MPQ4459 datasheet(2/17 Pages) MPS

2 / 17 page

MPQ4459 – INDUSTRIAL GRADE, 1.5A, 4MHz, 36V STEP-DOWN CONVERTER

MPQ4459 Rev. 1.0

www.MonolithicPower.com

12/5/2012

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

ORDERING INFORMATION

Part Number*

Package

Top Marking

MPQ4459DQT

TQFN10(3mm x 3mm)

* For Tape & Reel, add suffix –Z (eg. MPQ4459DQT–Z)

For RoHS compliant packaging, add suffix –LF(eg. MPQ4459DQT–LF–Z)

PACKAGE REFERENCE

ABSOLUTE MAXIMUM RATINGS (1)

Supply Voltage (VIN).....................–0.3V to +40V

Switch Voltage (VSW)............ –0.3V to VIN + 0.3V

BST to SW .....................................–0.3V to +6V

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

Continuous Power Dissipation

(TA = +25°C)

(2)

……………………………………………….2.5W

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

°C

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

°C

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

°C

Recommended Operating Conditions

(3)

Supply Voltage VIN ...........................3.8V to 36V

Output Voltage VOUT.........................0.8V to 30V

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

Thermal Resistance

(4)

θJA

θJC

3x3 TQFN10 ...........................50 ...... 12 ...

°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

calculated

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.

TOP VIEW

COMP

BST

VIN

FREQ

GND

EXPOSED PAD

ON BACKSIDE

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