MPQ28261 – 21V, 3A, 500kHz SYNCHRONOUS STEP-DOWN CONVERTER
ORDERING INFORMATION
Part Number*
Package
Top Marking
Operation Junction Temperature (Tj)
MPQ28261DL
QFN14 (3x4mm)
28261
-40°C to +125°C
* For Tape & Reel, add suffix –Z (e.g. MPQ28261DL–Z);
For RoHS, compliant packaging, add suffix –LF (e.g. MPQ28261DL–LF–Z).
PACKAGE REFERENCE
TOP VIEW
PIN 1 ID
1
2
3
4
5
6
7
14
13
12
11
10
9
8
ABSOLUTE MAXIMUM RATINGS (1)
VIN ................................................-0.3V to +23V
Thermal Resistance (5)
QFN14 (3x4mm).....................48...... 11... °C/W
θJA
θJC
V
V
SW.............. -0.3V(-5V for <10ns) to (VIN +0.3V)
BST ......................................................VSW + 6V
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.
Enable Current IEN(2)................................. 0.2mA
All Other Pins..................................-0.3V to +6V
Continuous Power Dissipation (TA = 25°C) (3)
............................................................. 2.6W
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature............... -65°C to +150°C
Recommended Operating Conditions (4)
Supply Voltage VIN ...........................4.5V to 21V
Output Voltage VOUT.....................0.603V to 18V
Maximum Junction Temp. (TJ) ................ 125°C
4) The device is not guaranteed to function outside of its
operating conditions.
5) Measured on JESD51-7, 4-layer PCB.
MPQ28261 Rev. 1.12
10/10/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
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