150mA CMOS Low Noise
LDO Voltage Regulator
(Preliminary)
Description
The SE5508 series of fixed output low dropout
linear regulators are designed for portable battery
powered applications, which require low noise
environment, fast enable response time, and low
dropout voltage. An optional bypass capacitor can
be added for better low-noise performance. Each
device contains a voltage reference unit, an error
amplifier, a PMOS power transistor, and resistors
for setting output voltage, and current limit and
temperature limit protection circuits.
The SE5508 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, and 3.3V.
SE5508
Features
Excellent Noise Rejection at 62 dB.
Typical Low Dropout Voltage of 200mV at
75mA.
Fast Enable Turn-On Time of 20μs (Typ.)
Excellent Line and Load Regulation.
High Accuracy Output Voltage of 2%.
Typical Low Ground Current at 50μA
Typical Disable Current Less than 0.1μA
Thermal Protection.
Standard SOT23-5L and SC70 (SOT353)
Package.
Available in Lead-Free Packages.
Applications
Cellphones.
Wireless LAN’s.
Hand-Held Instrumentation.
Portable Video Game Devices.
Digital Cameras.
Pin Configuration
Ordering Information
SE5508
_
__
Pin (1=>5):
G: V
IN
/GND/EN/BYPASS/V
OUT
Package: L: SOT-23-5L
P: SC70 (SOT353)
Output Voltage: A: V
OUT
= 3.3V
B: V
OUT
= 2.8V
C: V
OUT
= 2.5V
D: V
OUT
= 1.8V
E: V
OUT
= 1.5V
F: V
OUT
= 3.0V
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. ]
