MIC2238 Datasheet, PDF (3/16 Pages) Micrel Semiconductor – Dual Synchronous 800mA/800mA Step-Down DC/DC Regulator

Micrel, Inc.
Pin Out (cont.)
Pin Number
Adjustable
11
12
-
-
EP
Pin Number
Fixed
11
-
1
12
EP
MIC2238
Pin Name Pin Name
EN1
FB1
OUT2
OUT1
EP
Enable 1 input. Logic low powers down regulator 1. Logic
high powers up regulator 1. MIC2238 features built-in soft-
start circuitry that reduces in-rush current and prevents the
output voltage from overshooting at start up.
Feedback 1: For adjustable voltage options connect to the
external resistor divider network to FB1 to set the output
voltage of regulator 1. Nominal value is 0.8V.
Output Voltage 2. For fixed output voltage options connect
OUT2 to the output voltage of regulator 2.
Output Voltage 1. For fixed output voltage options connect
OUT1 to the output voltage of regulator 1.
Back-side pad.
July 2007
3
M9999-071307