MPQ8632 HIGH EFFICIENCY 18V SYNCHRONOUS STEP-DOWN CONVERTER FAMILY FOR 4A TO 20A
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
.......................................21V
V
SW
....................................... -0.3V to V
IN
+ 0.3V
V
SW
(30ns) ..................................-3V to V
IN
+ 3V
V
BST
.....................................................V
SW
+ 6V
V
BST
(30ns) ........................................V
SW
+ 6.5V
Enable Current I
EN(2)
................................ 2.5mA
All Other Pins ................................ –0.3V to +6V
(3)
Continuous Power Dissipation (T
A
=+25)
QFN3X4……………………….…..…………2.7W
QFN5X4……………………….…..…………3.3W
Junction Temperature .............................. 150C
Lead Temperature ................................... 260C
Storage Temperature ............... -65C to +150C
Thermal Resistance
(5)
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 T
J
(MAX), the junction-to-
ambient thermal resistance θ
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by P
D
(MAX)=(T
J
(MAX)-
T
A
)/θ
JA
. 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
operating conditions.
5) Measured on JESD51-7, 4-layer PCB.
θ
JA
θ
JC
Recommended Operating Conditions
(4)
Supply Voltage V
IN
.......................... 4.5V to 18V
Output Voltage V
OUT
.................... 0.611V to 13V
Enable Current I
EN
...................................... 1mA
Operating Junction Temp. (T
J
).-40°C to +125°C
MPQ8632 Rev.1.24
www.MonolithicPower.com
8/28/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
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