MIC2954_07 Datasheet, PDF (3/15 Pages) Micrel Semiconductor – 250mA Low-Dropout Regulator

Micrel, Inc.
Pin Configuration
OUT 1
SNS 2
SHDN 3
GND 4
8 IN
7 FB
6 TAP
5 ERR
8-Pin SOIC (M)
TO-92
3-Pin TO-92 (Z)
3 OUT
2 GND
1 IN
MIC2954
123
IN GND OUT
3-Pin SOT-223 (S)
3-Pin TO-220 (T)
3 OUT
2 GND
1 IN
Pin Description
Pin No.
SOIC-8
8
4
1
2
Pin No.
SOT-223
1
2, TAB
3
Pin No.
TO-92
1
2
3
3
5
6
7
Pin No.
TO-220
1
2
3
Pin Name Pin Name
IN
GND
OUT
SNS
SHDN
/ERR
TAP
FB
Supply Input.
Ground.
Regulator Output.
Sense (Input): Output-sense-voltage end of internal resistive divider.
Connect to OUT (V_OUT = 5V) for fixed5V operation; also see TAP.
Not used in adjustable configuration.
Shutdown (Input): Active-low input enables regulator.
(Low = enable; high = shutdown.)
Error Flag (Output): Open collector (active-low) output. Active state
indicates an output (V_OUT) undervoltage condition.
(Low = error, floating = normal.)
Divider Tap (Output): Resistive voltage divider tap. With 5Vapplied to
SNS, VTAP is approximately 1.23V. Connect to FB for 5V operation.
Not used in adjustable configuration.
Feedback (Input): Error amplifier input. Compared to internal1.23V
reference. Connect to external voltage divider for adjustable operation
or internal voltage divider (TAP) for 5V operation (see SNS, TAP).
September 2007
3
M9999-090607