	UNITED STATES
	SECURITIES AND EXCHANGE COMMISSION
	Washington, D.C. 20549
	SCHEDULE 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b)

Under the Securities Exchange Act of 1934
(Amendment No. )*

Advanced Analogic Technologies Incorporated

(Name of Issuer)

Common Stock, $0.001 par value

(Title of Class of Securities)

00752J108

(CUSIP Number)

December 31, 2005

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o	Rule 13d-1(b)
o	Rule 13d-1(c)
ý	Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 00752J108

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Battery Ventures VI, L.P. (“BV6”)

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization Delaware

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,136,000 shares, except that Battery Partners VI, LLC (“BPVI LLC”), the general partner of BV6, may be deemed to have sole power to vote these shares; Richard D. Frisbie (“Frisbie”), a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Oliver D. Curme (“Curme”), a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Thomas J. Crotty (“Crotty”), a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Kenneth P. Lawler (“Lawler”) a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Morgan M. Jones (“Jones”), a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Mark H. Sherman (“Sherman”), a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; and Scott R. Tobin (“Tobin”), a managing member of BPVI LLC, may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,136,000 shares, except that BPVI LLC, the general partner of BV6, may be deemed to have sole power to vote these shares; Frisbie, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Curme, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Crotty, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Lawler, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Jones, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Sherman, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; and Tobin, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,136,000

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.27%

	12.	Type of Reporting Person (See Instructions) PN

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Battery Partners VI, LLC

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization Delaware

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,136,000 shares, except that Frisbie, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Curme, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Crotty, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Lawler, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Jones, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Sherman, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; and Tobin, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,136,000 shares, except that Frisbie, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Curme, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Crotty, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Lawler, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Jones, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; Sherman, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares; and Tobin, a managing member of BPVI LLC, may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,136,000

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.27%

	12.	Type of Reporting Person (See Instructions) OO

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Battery Investment Partners VI, LLC (“BIP6”)

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization Delaware

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 130,666 shares, except that except that Curme, a managing member of BIP6, may be deemed to have sole power to vote these shares; and Crotty, a managing member of BIP6, may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 130,666 shares, except that except that Curme, a managing member of BIP6, may be deemed to have sole power to vote these shares; and Crotty, a managing member of BIP6, may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 130,666

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 0.30%

	12.	Type of Reporting Person (See Instructions) OO

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Richard D. Frisbie

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization USA

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Frisbie is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Frisbie is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,136,000

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.27%

	12.	Type of Reporting Person (See Instructions) IN

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Oliver D. Curme

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization USA

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,266,666 shares, of which 3,136,000 are directly owned by BV6 and 130,666 are directly owned by BIP6. Curme is (i) a managing member of BPVI LLC, which is the general partner of BV6 and (ii) a managing member of BIP6, and may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,266,666 shares, of which 3,136,000 are directly owned by BV6 and 130,666 are directly owned by BIP6. Curme is (i) a managing member of BPVI LLC, which is the general partner of BV6 and (ii) a managing member of BIP6, and may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,266,666

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.57%

	12.	Type of Reporting Person (See Instructions) IN

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Thomas J. Crotty

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization USA

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,266,666 shares, of which 3,136,000 are directly owned by BV6 and 130,666 are directly owned by BIP6. Crotty is (i) a managing member of BPVI LLC, which is the general partner of BV6 and (ii) a managing member of BIP6, and may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,266,666 shares, of which 3,136,000 are directly owned by BV6 and 130,666 are directly owned by BIP6. Crotty is (i) a managing member of BPVI LLC, which is the general partner of BV6 and (ii) a managing member of BIP6, and may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,266,666

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.57%

	12.	Type of Reporting Person (See Instructions) IN

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Kenneth P. Lawler

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization USA

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Lawler is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Lawler is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,136,000

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.27%

	12.	Type of Reporting Person (See Instructions) IN

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Morgan M. Jones

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization USA

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Jones is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Jones is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,136,000

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.27%

	12.	Type of Reporting Person (See Instructions) IN

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Mark H. Sherman

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization USA

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Sherman is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Sherman is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,136,000

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.27%

	12.	Type of Reporting Person (See Instructions) IN

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Scott R. Tobin

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		ý

	3.	SEC Use Only

	4.	Citizenship or Place of Organization USA

Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Tobin is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			6.		Shared Voting Power See response to row 5

			7.		Sole Dispositive Power 3,136,000 shares, of which 3,136,000 are directly owned by BV6. Tobin is (i) a managing member of BPVI LLC, which is the general partner of BV6 and may be deemed to have sole power to vote these shares.

			8.		Shared Dispositive Power See response to row 7

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 3,136,000

	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) o

	11.	Percent of Class Represented by Amount in Row (9) 7.27%

	12.	Type of Reporting Person (See Instructions) IN

Item 1.
	(a)	Name of Issuer Advanced Analogic Technologies Incorporated
	(b)	Address of Issuer’s Principal Executive Offices 830 East Arques Ave. Sunnyvale, CA 94085

Item 2.
	(a)	Name of Person Filing Battery Ventures VI, L.P. (“BV6”), Battery Partners VI, LLC (“BPVI LLC”), Battery Investment Partners VI, LLC (“BIP6”), Richard D. Frisbie (“Frisbie”), Oliver D. Curme (“Curme”), Thomas J. Crotty (“Crotty”), Kenneth P. Lawler (“Lawler”), Morgan M. Jones (“Jones”), Mark H. Sherman (“Sherman”), and Scott R. Tobin (“Tobin”). The foregoing entities and individuals are collectively referred to as the “Reporting Persons.” Frisbie, Curme, Crotty, Lawler, Jones, Sherman, and Tobin are the sole managing members of BPVI LLC, the sole general partner of BV6. BIP6 invests alongside BV6 in all investments made by BV6. Curme and Crotty are the sole managing members of BIP6.
	(b)	Address of Principal Business Office or, if none, Residence The address for each of the Reporting Persons is: Battery Ventures 20 William Street Wellesley, MA 02481
	(c)	Citizenship Frisbie, Curme, Crotty, Lawler, Jones, Sherman, and Tobin are United States citizens. BV6 is a limited partnership organized under the laws of the State of Delaware. BPVI LLC and BIP6 are limited liability companies organized under the laws of the State of Delaware.
	(d)	Title of Class of Securities Common Stock, $0.001 par value per share
	(e)	CUSIP Number 00752J108

Item 3.	If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
	(a)	o	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
	(b)	o	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
	(c)	o	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
	(d)	o	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8).
	(e)	o	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
	(f)	o	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
	(g)	o	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
	(h)	o	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
	(i)	o	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
	(j)	o	Group, in accordance with §240.13d-1(b)(1)(ii)(J).
			Not Applicable

Item 4.	Ownership
The approximate percentages of Common Stock reported as beneficially owned by the Reporting Persons is based upon 43,131,361 shares of Common Stock outstanding as of October 31, 2005, as reported in the Issuer’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2005.

The following information with respect to the ownership of the ordinary shares of the issuer by the Reporting Persons filing this Statement is provided as of December 31, 2005:

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
	(a)	Amount beneficially owned: See Row 9 of cover page for each Reporting Person.
	(b)	Percent of class: See Row 11 of cover page for each Reporting Person.
	(c)	Number of shares as to which the person has:
		(i)	Sole power to vote or to direct the vote See Row 5 of cover page for each Reporting Person.
		(ii)	Shared power to vote or to direct the vote See Row 6 of cover page for each Reporting Person.
		(iii)	Sole power to dispose or to direct the disposition of See Row 7 of cover page for each Reporting Person.
		(iv)	Shared power to dispose or to direct the disposition of See Row 8 of cover page for each Reporting Person.

Item 5.	Ownership of Five Percent or Less of a Class
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following o.
	Not applicable.

Item 6.	Ownership of More than Five Percent on Behalf of Another Person
	Under certain circumstances set forth in the limited partnership agreement of BV6 and the limited liability company agreement of BIP6, the general and limited partners of each such entity may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the issuer owned by each such entity of which they are a partner.

Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person
	Not applicable.

Item 8.	Identification and Classification of Members of the Group
	Not applicable.

Item 9.	Notice of Dissolution of Group
	Not applicable.

Item 10.	Certification
	Not applicable.

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: February 9, 2005

	BATTERY VENTURES VI, L.P.

	By:	Battery Partners VI, LLC

	By:	*
		Managing Member

	BATTERY PARTNERS VI, LLC

	By:	*
		Managing Member

	BATTERY INVESTMENT PARTNERS VI, LLC

	By:	*
		Managing Member

	RICHARD D. FRISBIE

	By:	*
		Richard D. Frisbie

	OLIVER D. CURME

	By:	*
		Oliver D. Curme

	THOMAS J. CROTTY

	By:	*
		Thomas J. Crotty

	KENNETH P. LAWLER

	By:	*
		Kenneth P. Lawler

	MORGAN M. JONES

	By:	*
		Morgan M. Jones

	MARK H. SHERMAN

	By:	*
		Mark H. Sherman

	SCOTT R. TOBIN

	By:	*
		Scott R. Tobin

*By:	/s/ Christopher Hanson
Name:	Christopher Hanson
	Attorney-in-Fact

This Schedule 13G was executed pursuant to a Power of Attorney. Note that copies of the applicable Powers of Attorney are already on file with the appropriate agencies.

EXHIBIT I

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required on Schedule 13G need be filed with respect to ownership by each of the undersigned of shares of Common Stock of Advanced Analogic Technologies Incorporated.

This Agreement may be executed in any number of counterparts, each of which shall be deemed an original.

Dated February 9, 2005

	BATTERY VENTURES VI, L.P.

	By: Battery Partners VI, LLC

	By:	*
		Managing Member

	BATTERY PARTNERS VI, LLC

	By:	*
		Managing Member

	BATTERY INVESTMENT PARTNERS VI, LLC

	By:	*
		Managing Member

	RICHARD D. FRISBIE

	By:	*
		Richard D. Frisbie

	OLIVER D. CURME

	By:	*
		Oliver D. Curme

	THOMAS J. CROTTY

	By:	*
		Thomas J. Crotty

	KENNETH P. LAWLER

	By:	*
		Kenneth P. Lawler

	MORGAN M. JONES

	By:	*
		Morgan M. Jones

	MARK H. SHERMAN

	By:	*
		Mark H. Sherman

	SCOTT R. TOBIN

	By:	*
		Scott R. Tobin

*By:	/s/ Christopher Hanson
Name:	Christopher Hanson
	Attorney-in-Fact

This Schedule 13G was executed pursuant to a Power of Attorney. Note that copies of the applicable Powers of Attorney are already on file with the appropriate agencies.