MP8642 datasheet(2/12 Pages) MPS

2 / 12 page

MP8642 — DUAL 3A, 23V, 600kHz STEP-DOWN CONVERTER

MP8642 Rev. 1.0

www.MonolithicPower.com

9/13/2012

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

ORDERING INFORMATION

Part Number*

Package

Top Marking

Free Air Temperature (TA)

MP8642DU

QFN32 (5mm x5mm)

M8642DU

–40

C to +85C

* For Tape & Reel, add suffix –Z (e.g. MP MP8642DU–Z);

For RoHS compliant packaging, add suffix –LF; (e.g. MP8642DU–LF–Z)

PACKAGE REFERENCE

IN2

N/C

EN/SYNC2

PG2

FB2

IN2

SW1

BST1

VCC1

BG1

GND1

SW1

910

ABSOLUTE MAXIMUM RATINGS (1)

Supply Voltage VIN ....................................... 25V

VSW.........................-0.3V(-5V for < 10ns) to 26V

VBS ....................................................... VSW + 6V

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

Continuous Power Dissipation (TA = +25°C)

(2)

........................................................... 3.47W

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

C

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

C

Storage Temperature.............. –65

C to +150C

Recommended Operating Conditions

(3)

Supply Voltage VIN ...........................4.5V to 23V

Output Voltage VOUT.........................0.8V to 20V

Operating Junct. Temp (TJ)..... –40C to +125C

Thermal Resistance

(4)

θJA

θJC

5x5 QFN32 ……………………36………8…

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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