MPQ8632 HIGH EFFICIENCY 18V SYNCHRONOUS STEP-DOWN CONVERTER FAMILY FOR 4A TO 20A
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance (5)
θJA θJC
Supply Voltage VIN .......................................21V
VSW .......................................-0.3V to VIN + 0.3V
VSW (30ns) ..................................-3V to VIN + 3V
VBST .....................................................VSW + 6V
VBST (30ns)........................................VSW + 6.5V
Enable Current IEN(2)................................ 2.5mA
All Other Pins................................ –0.3V to +6V
QFN (3x4mm) ........................ 46....... 9.... C/W
QFN (5x4mm) ........................ 38....... 6.... C/W
Notes:
1) Exceeding these ratings may damage the device.
2) Refer to the section “Configuring the EN Control”.
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.
(3)
Continuous Power Dissipation (TA=+25)
QFN3X4……………………….…..…………2.7W
QFN5X4……………………….…..…………3.3W
Junction Temperature..............................150C
Lead Temperature ...................................260C
Storage Temperature...............-65C to +150C
4) The device is not guaranteed to function outside of its
operating conditions.
5) Measured on JESD51-7, 4-layer PCB.
Recommended Operating Conditions (4)
Supply Voltage VIN .......................... 4.5V to 18V
Output Voltage VOUT.................... 0.611V to 13V
Enable Current IEN...................................... 1mA
Operating Junction Temp. (TJ).-40°C to +125°C
MPQ8632 Rev.1.24
8/28/2013
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