SPX2920 Datasheet, PDF (1/10 Pages) Sipex Corporation – 400mA Low Drop Out Voltage Regulator with Shutdown

®
SPX2920
400mA Low Drop Out Voltage Regulator with Shutdown
FEATURES
■ Output 3.3V, 5.0V, at 400mA Output
■ Very Low Quiescent Current
■ Low Dropout Voltage
■ Extremely Tight Load And Line Regulation
■ Very Low Temperature Coefficient
■ Current & Thermal Limiting
■ Error Flag Warns Of Output Dropout
(for SO-8)
■ Logic-Controlled Electronic Shutdown
(for SO-8)
■ Output Programmable From 1.24V to 20V
(for SO-8)
■ Equivalent Replacement for MIC2920A and
MIC2904
+V_IN
100K
SHUTDOWN
INPUT
OFF
ON
8 _+VIN
1
V_OUT
SPX2920 FB ⁷
SD
3
______
ERROR
GND
5
4
1.2V to 20V
+
R₁ ^{0.01µF 10µF}
V_REF
R₂
ERROR
OUTPUT
Adjustable Regulator
V_IN
+
0.1 µF
IN
OUT
SPX2920
GND
IG
5V
+
2.2 µF
5V Regulator Circuit
DESCRIPTION
The SPX2920 is a low power voltage regulator. This device is an excellent choice for use in battery-powered
applications such as cordless telephones, radio control systems, and portable computers. The SPX2920
features very low quiescent current (140µA Typ.) and very low dropout voltage. This includes a tight initial
tolerance of 1% max and very low output temperature coefficient, making the SPX2920 useful as a low-
power voltage reference.
The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling
voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the
regulator to be switched on and off. The SPX2920 is offered in 3-pin TO-220 package, SO-8 (same pin
out as SPX2951), SOT-223, and surface mount and 3-pin TO-263 packages.
The regulator output voltage (of the SO-8) may be pin-strapped for a 3.3V and 5.0V or programmed from
1.24V to 20V with an external pair of resistors.
TO-220-3 (U)
SPX2920
123
TO-263-3 (T)
SPX2920
1
2
3
8-Pin Surface Mount
SOT-223 (M3)
V_OUT
SENSE
SHUTDOWN
GND
1
8
2
7
SPX2920
3
6
4
5
V_IN
FEEDBACK
5V/ 3.3V TAP
ERROR
SPX2920
1 23
V_{IN GND} V_OUT
V_IN GND V_OUT
Front View
V_IN GND V_OUT
Top View
Top View
Top View
Rev: A Date: 03/30/04
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
1
©Copyright 2004 Sipex Corporation