600mA CMOS Low Power Low
Noise LDO Voltage Regulator
Description
The SE5121 series of fixed output low dropout
linear regulators are designed for portable battery
powered applications, which require low power
consumption, low noise environment, and low
dropout voltage. Each device contains a bandgap
voltage reference, an error amplifier, a PMOS
power transistor, and resistors for setting output
voltage, and current limit and temperature limit
protection circuits.
The SE5121 has been designed to be used
with low cost capacitors and requires a minimum
output capacitor of 1.0μF. Standard voltage versions
are 1.5, 1.8, 2.5, 2.8, 3.0, 3.3, 3.5and 3.6V.
SE5121
Features
Typical 175mV Dropout Voltage at 150mA.
Excellent Line and Load Regulation.
High Accuracy Output Voltage of 2%.
Ultra-Low Ground Current at 35μA (Typ.)
Over Current and thermal Protection.
Standard SOT-89-3L Package.
100% Lead (Pb)-Free
Application
USB removable devices
MPEG4 devices
Wireless LAN’s
Hand-Held Instrumentation.
Portable DVD players
Digital camera
Pin Configuration
Ordering Information
SE5121 _ _ _
PIN (1=>3): 1. G: OUT/GND/IN
2. N: GND/IN/OUT
Package Type: 1. K: SOT-89-3L
Output Voltage: 1. A: V
OUT
= 3.3V
2. B: V
OUT
= 2.8V
3. C: V
OUT
= 2.5V
4. D: V
OUT
= 1.8V
5. E: V
OUT
= 1.5V
6. F: V
OUT
= 3.0V
7. Y: V
OUT
= 3.5V
8. Q: V
OUT
= 3.6V
Block Diagram
Revision 12/4/2008
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2005. • www.seawardinc.com.cn • Page 1
SEAWARD [ Seaward Electronics Inc. ]
