Dual 200mA CMOS
LDO Voltage Regulator
(Preliminary)
Description
SE5221
is a
dual-channel
low dropout
regulator supplying up to 200mA at each channel.
The output voltages are selectable between
2.8V/3.3V
for
Channel-1
and
1.3V/1.8V
for
Channel-2 with 3% accuracy.
The SE5221 uses internal PMOS transistors
as the pass devices to regulate the output voltages.
The IC consumes 120μA supply current when both
channels are turned on, and is nearly independent
of load currents and dropout conditions. The EN1
and EN2 pins allows for individual channel controls.
When both outputs are shut down simultaneously,
the chip will be turned off and consumes nearly zero
operating current which is suitable for battery-power
devices. Other features include a current limiting,
and over temperature protection.
SE5221
Features
Typical 256mV Dropout Voltage at 200mA
Up to 200mA Output Current (Each Channel)
Low Ground Current at 120uA (Typ.)
Dual Shutdown Pins to Control Each Output
Current Limiting and Thermal Protection
Two LDOs in SOT-23-6L Package
100% Lead (Pb)-Free
Application
Cellular Phones.
Laptop, Notebook, and Palmtop Computers.
Battery-Powered Equipments.
Hand-held Equipments.
Wireless LAN Devices.
Ordering Information
SE5221 _ _ L G
Pin (1=>6):
G: V
out2
/GND/EN2/EN1/V
IN
/V
OUT1
L: SOT23-6L
D: V
OUT2
= 1.8V
G: V
OUT2
= 1.3V
A: V
OUT1
= 3.3V
Pin Configuration
Application Diagram
B: V
OUT1
= 2.8V
Chip enable
3
Chip enable
EN2
EN1
6
1
VOUT2 VOUT1
4
VIN
GND
2
5
2.2uF
2.2uF
2.2uF
Revision 9/4/2008
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 1
SEAWARD [ Seaward Electronics Inc. ]
