SPX1121_05 Datasheet, PDF (1/9 Pages) Sipex Corporation – 150mA Low Dropout Voltage Regulator

®
SPX1121
150mA Low Dropout Voltage Regulator
FEATURES
■ 5.0V and 3.3V output versions
■ 1% Output Accuracy
■ Very Low Quiescent Current
■ Low Dropout: 300mV @ 150mA
■ Very Tight Load & Line Regulation
■ Very Low Temperature Coefficient
■ Current and Thermal Limiting
■ Requires only 1µF for Stability
■ Equivalent Replacement for LT1121
■ Industry Standard SOT-223 and TO-92
3 lead packages
V_IN
I_IN
+
0.1µF
I_IN= I _L+ I _G
IN
OUT
SPX1121
GND
I_G
5V
I_L
+
2.2µF
LOAD
Figure 1. Fixed +5V Regulator Circuit
DESCRIPTION
The SPX1121 is a low power voltage regulator. It is an excellent choice for use in battery-powered
applications such as cordless telephones, radio control systems, and portable computers. The
SPX1121 features very low quiescent current and low dropout voltage (typ. 20mV at 100µA and
300mV at 150mA). A tight initial tolerance (1%), extremely good load and line regulation (0.05%
typ.), and very low output temperature coefficient (20 ppm/°C typ.), make the SPX1121 useful
as a low power voltage reference.
PACKAGE PINOUOTS
SOT-223 Package (M3)
GND
SPX1121
123
V GND V
IN
OUT
Front View
TO-92 (N)
123
INPUT
OUTPUT
GND
Bottom View
Date: 12/20/05
SPX1121 150mA Low DropoutVoltage Regulator
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