SE5121 Datasheet, PDF (1/5 Pages) Seaward Electronics Inc. – 600mA CMOS Low Power Low Noise LDO Voltage Regulator

600mA CMOS Low Power Low
Noise LDO Voltage Regulator
SE5121
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.
Pin Configuration
Features
¾ Typical 175mV Dropout Voltage at 150mA.
¾ Excellent Line and Load Regulation.
¾ High Accuracy Output Voltage of 2%.
¾ Ultra-Low Ground Current at 35μA (Typ.)
¾ Over Current and thermal Protection.
¾ Standard SOT-89-3L Package.
¾ 100% Lead (Pb)-Free
Application
¾ USB removable devices
¾ MPEG4 devices
¾ Wireless LAN’s
¾ Hand-Held Instrumentation.
¾ Portable DVD players
¾ Digital camera
Ordering Information
SE5121 _ _ _
PIN (1=>3): 1. G: OUT/GND/IN
2. N: GND/IN/OUT
Package Type: 1. K: SOT-89-3L
Block Diagram
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
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