SPX2954 Datasheet, PDF (1/15 Pages) Sipex Corporation – 250 mA Low Drop Out Voltage Regulator

SPX2954
250mA Low Dropout Voltage Regulator
Description
The SPX2954 and SPX2954A are low power voltage regulators.
These devices are an excellent choice for use in battery-powered
applications such as cordless telephones, radio control systems,
and portable computers. The SPX2954 and SPX2954A feature low
quiescent current and low dropout voltage (typ. 20mV at 100µA and
310mV at 250mA). This includes a tight initial tolerance (0.5% for
SPX2954A), extremely good load and line regulation (0.05% typ.),
and very low output temperature coefficient (20 ppm/°C typ.), making
the SPX2954/SPX2954A useful as a low-power voltage reference.
The error flag output feature is used as a power-on reset for warning
of a low output voltage, due to a falling input voltage. The logic-
compatible shutdown feature enables the regulator to be switched
ON and OFF. The SPX2954/SPX2954A is offered in a 3-pin SOT-223
package and an 8-pin SOIC package.
FEATURES
■■ 5.0V and 3.3V versions at 250mA output
■■ Accurate 0.5% for SPX2954A
■■ Very low quiescent current
■■ Low dropout: 310mV at 250mA
■■ Extremely tight load and line regulation
■■ Very low temperature coefficient
■■ Current and thermal limiting
■■ Need only 1µF for stability
■■ _{Direct replacement for LP2954}
■■ Error flag warns of output dropout
■■ Logic-controlled electronic shutdown
■■ Programmable output from 1.24V to 30V
Typical Application
V_IN
100K
ERROR
OUTPUT
SHUTDOWN
INPUT
5
ERROR
8
VIN
1
VOUT
SPX2954
3
SD
GND
4
FB
7
1.23V
1.2 to 30V
+
R₁
3.3μF
.01μF
V_REF
R₂
Typical Application
REV1A
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