MP4473GL datasheet(3/21 Pages) MPS

3 / 21 page

MP4473–HIGH-EFFICIENCY, FAST-TRANSIENT, SYNCHRONOUS, STEP-DOWN CONVERTER

MP4473 Rev. 1.0

www.MonolithicPower.com

12/15/2014

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

ABSOLUTE MAXIMUM RATINGS (1)

Supply Voltage VIN ....................................... 40V

VSW........................................-0.3V to VIN + 0.3V

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

VPGOOD....................................-0.3V to VCC+0.6V

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

Continuous Power Dissipation

(TA = +25°C)

(2)

………………………………… …………….2.6W

Operating 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 36V

Output Voltage VOUT................... 0.8V to 0.9×VIN

Operating Junction Temp. (TJ). -40°C to +125°C

Thermal Resistance

(4)

θJA

θJC

QFN-20 (3mm×4mm)..............48 ...... 10 ... °C/W

Notes:

1) Absolute maximum ratings are rated under room temperature

unless otherwise noted. 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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