MP9943 datasheet(3/20 Pages) MPS

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MP9943 – 36V, 3A PEAK SYNCHRONOUS STEP-DOWN CONVERTER

MP9943 Rev.1.1

www.MonolithicPower.com

7/4/2017

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

ABSOLUTE MAXIMUM RATINGS (1)

VIN ..................................................-0.3V to 40V

VSW..................................................-0.3V to 41V

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

All Other Pins................................ -0.3V to 6V (2)

Continuous Power Dissipation (TA = +25°C)

(3)

QFN-8 (3mmx3mm)................................. 2.27W

Junction Temperature...............................150°C

Lead Temperature ....................................260°C

Storage Temperature................. -65°C to 150°C

Recommended Operating Conditions(4)

Continuous Supply Voltage VIN...........4V to 36V

Output Voltage VOUT..................0.8V to DMaxхVIN

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

Thermal Resistance

(5)

θJA

θJC

QFN-8 (3mmx3mm)............... 55 ...... 13... °C/W

Notes:

1) Absolute maximum ratings are rated under room temperature

unless otherwise noted. Exceeding these ratings may

damage the device.

2) About the details of EN/SYNC pin’s ABS MAX rating, please

refer to page 12, Enable/SYNC control section.

3) 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.

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

operation condition.

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

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