MP28256EL datasheet(2/13 Pages) MPS

2 / 13 page

MP28256 – 21V, 3A, 500kHz SYNCHRONOUS STEP-DOWN CONVERTER

MP28256 Rev. 1.0

www.MonolithicPower.com

11/3/2011

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

ORDERING INFORMATION

Part Number*

Package

Top Marking

Free Air Temperature (TA)

MP28256EL

QFN14 (3x4mm)

28256

-20

C to +85C

* For Tape & Reel, add suffix –Z (e.g. MP28256EL–Z);

For RoHS, compliant packaging, add suffix –LF (e.g. MP28256EL–LF–Z).

PACKAGE REFERENCE

ABSOLUTE MAXIMUM RATINGS (1)

VIN ..................................................-0.3V to 22V

VSW..................................................-0.3V to 23V

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

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

Junction Temperature...............................150

C

Lead Temperature ....................................260

C

Continuous Power Dissipation (TA = +25°C)

(2)

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

Junction Temperature...............................150

C

Operating Temperature.............. -20

C to +85C

Recommended Operating Conditions

(3)

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

Output Voltage VOUT.........................0.6V to 18V

Maximum Junction Temp. (TJ) ............... +125C

Thermal Resistance

(4)

θJA

θJC

QFN14 (3x4mm)..................... 48 ...... 11...

C/W

Notes:

1) Exceeding these ratings may damage the device.

2) 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.

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

operating conditions.

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

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