MPQ28261 datasheet(2/20 Pages) MPS

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MPQ28261 – 21V, 3A, 500kHz SYNCHRONOUS STEP-DOWN CONVERTER

MPQ28261 Rev. 1.12

www.MonolithicPower.com

10/10/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

ORDERING INFORMATION

Part Number*

Package

Top Marking

Operation Junction Temperature (Tj)

MPQ28261DL

QFN14 (3x4mm)

28261

-40

°C to +125°C

* For Tape & Reel, add suffix –Z (e.g. MPQ28261DL–Z);

For RoHS, compliant packaging, add suffix –LF (e.g. MPQ28261DL–LF–Z).

PACKAGE REFERENCE

ABSOLUTE MAXIMUM RATINGS (1)

VIN ................................................-0.3V to +23V

VSW.............. -0.3V(-5V for <10ns) to (VIN +0.3V)

VBST ...................................................... VSW + 6V

Enable Current IEN

(2)................................. 0.2mA

All Other Pins..................................-0.3V to +6V

Continuous Power Dissipation (TA = 25°C)

(3)

............................................................. 2.6W

Junction Temperature...............................150°C

Lead Temperature ....................................260°C

Storage Temperature............... -65°C to +150°C

Recommended Operating Conditions

(4)

Supply Voltage VIN ...........................4.5V to 21V

Output Voltage VOUT.....................0.603V to 18V

Thermal Resistance

(5)

θJA

θJC

QFN14 (3x4mm)..................... 48 ...... 11... °C/W

Notes:

1) Exceeding these ratings may damage the device.

2) Refer to the section “Configuring the EN Control”.

3) The maximum allowable power dissipation is a function of the

maximum junction temperature TJ (MAX), the junction-to-

ambient thermal resistance θJA, and the ambient temperature

TA. The maximum allowable continuous power dissipation at

any ambient temperature is calculated by PD (MAX) = (TJ

(MAX)-TA)/θJA. Exceeding the maximum allowable power

dissipation will cause excessive die temperature, and the

regulator will go into thermal shutdown. Internal thermal

shutdown circuitry protects the device from permanent

damage.

4) The device is not guaranteed to function outside of its

operating conditions.

5) Measured on JESD51-7, 4-layer PCB.

Maximum Junction Temp. (TJ) ................ 125°C

PIN 1 ID

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