MPQ4485 datasheet(4/22 Pages) MPS

4 / 22 page

MPQ4485

– STEP-DOWN CONVERTER WITH DUAL USB CHARGING PORTS

MPQ4485 Rev.1.0

www.MonolithicPower.com

9/18/2017

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

ABSOLUTE MAXIMUM RATINGS (1)

Supply voltage (VIN) ..................... -0.4V to +40V

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

to VIN + 0.3V (43V for <10ns)

VBST ..................................................VSW + 5.5V

VEN ..........................................-0.3V to +10V

(2)

VOUT, VUSB

......................................................................................

-0.3V to +6.5V

All other pins............................... -0.3V to +5.5V

Continuous power dissipation (TA = +25°C)

(3)

QFN-26 (5mmx5mm) ...............................6.25W

Junction temperature ............................... 150°C

Lead temperature .................................... 260°C

Storage temperature................ -65°C to +150°C

Recommended Operating Conditions

(4)

Operation input voltage range............ 6V to 36V

Output current........3A for USB1, 2.5A for USB2

Operating junction temp. (TJ)... -40°C to +125°C

Thermal Resistance

θJA

θJC

QFN-26 (5mmx5mm)

JESD51-7

(5) ......................... 44........ 9 .... °C/W

50mmx50mm 4-Layer PCB ... 20........ 2 .... °C/W

NOTES:

1) Absolute maximum ratings are rated under room temperature

unless otherwise noted. Exceeding these ratings may

damage the device.

2) For details on EN

’s ABS max rating, please refer to the EN

Control section on page 13.

3) The maximum allowable power dissipation is a function of the

maximum junction temperature TJ (MAX), the junction-to-

ambient thermal resistance θ

JA, 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 produces an excessive die temperature, causing

the regulator to go into thermal shutdown. Internal thermal

shutdown circuitry protects the device from permanent

damage. Measured on a 4-layer PCB (50mmx50mm).

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

operating conditions.

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

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