MP2905 datasheet(2/16 Pages) MPS

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MP2905- 3V to 28V INPUT, HYSTERETIC SYNCHRONOUS STEP-DOWN CONTROLLER

MP2905 Rev. 0.91

www.monolithicpower.com

4/18/2011

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

ORDERING INFORMATION

*For Tape & Reel, add suffix –Z (eg. MP2905EK–Z).

For RoHS compliant packaging, add suffix –LF (eg. MP2905EK–LF–Z)

PACKAGE REFERENCE

REF

GND

ILIM

BST

TOP VIEW

ABSOLUTE MAXIMUM RATINGS (1)

IN to GND ……... ….. …............-0.3V to +30V

REF to GND …………................-0.3V to +6.5V

IN to REF ……........ …................-0.3V to +25V

SS to GND …………..….. -0.3V to (REF + 0.3V)

LG to GND …………….. -0.3V to (REF + 0.3V)

BST to GND…………………….. -0.3V to 36.5V

BST to SW……………..…….….-0.3V to + 6.5V

SW to GND………..………….….-0.3V to +30V

HG to SW …………..….-0.3V to (BST + 0.3) V

FB to GND……………………..…-0.3V to +6.5V

ILIM to GND ......... …..........-0.3V to (IN + 0.3V)

ILIM to SW ………………….-0.6V to (IN + 0.3V)

HG and LG continuous current...±250mA RMS

Continuous Power Dissipation (TA = +25°C)

(2)

……………………………………………….0.77W

Junction Temperature.............................+140°C

Storage Temperature Range

. ……….....................................-65°C to +150°C

Lead Temperature (soldering, 10s)

……........................................................+300°C

Recommended Operating Conditions

(3)

Supply Voltage VIN.............................. 3V to 28V

Operating Temperature .............–20

°C to +85°C

Thermal Resistance

(4)

θJA

θJC

MSOP10-EP ............................. 150 65

°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 power dissipation at any ambient

temperature is calculated using: 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. Thermal

shutdown engages at TJ=140

oC(TYP) and disengages at

TJ=120

oC(TYP)

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

operating conditions.

4) Measured on JESD51-7 4-layer board.

Part Number*

Package

Top Marking

Temperature

MP2905EK

MSOP10

2905E

–20

°C to +85°C

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