UM3501_15 Datasheet, PDF (2/11 Pages) Union Semiconductor, Inc. – 600mA, 1.2MHz, Synchronous Step-Down DC-DC Converter

UM3501
Pin Configurations
Top View
VIN 1
GND 2
EN 3
5 SW
4 FB
(Top View)
5
4
5CA
1
2
3
UM3501
M: Month Code
SOT23-5
NC 1
EN 2
6 FB
5 GND
AAE
VIN 3
4 SW
UM3501DA
M: Month Code
DFN6 2.0×2.0
Pin Description
Pin Number
SOT23-5 DFN6 2.0×2.0
1
3
2
5
3
2
4
6
5
4
-
1
Symbol
Function
VIN
GND
EN
FB
SW
NC
Supply input pin. Must be closely decoupled to GND,
Pin2, with a 4.7μF or greater ceramic capacitor.
Ground.
Regulator enable control input. Drive EN above 1.0V
to turn on the part. Drive EN below 0.4V to turn it
off. In shutdown, all functions are disabled drawing
<1μA supply current. Do not leave EN floating.
Feedback input pin. Connect FB to the center point of
the external resistor divider.
Power switch output. It is the switch node connection to
Inductor.
This pin connects to the drains of the internal P-CH and
N-CH MOSFET switches.
Not connected.
Ordering Information
Part Number
UM3501
UM3501DA
Packaging Type
SOT23-5
DFN6 2.0×2.0
Marking Code
5CA
AAE
Shipping Qty
3000pcs/7Inch
Tape & Reel
3000pcs/7Inch
Tape & Reel
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http://www.union-ic.com Rev.06 Feb.2015
2/11