MIC2954
Micrel
Ordering Information
Part Number
MIC2954-02BT
MIC2954-03BT
MIC2954-02BS
MIC2954-03BS
MIC2954-02BZ
MIC2954-03BZ
MIC2954-07BM
MIC2954-08BM
Accuracy
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
Junc. Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
TO-220
TO-220
SOT-223
SOT-223
TO-92
TO-92
SOP-8
SOP-8
Pin Configuration
MIC2954
OUT
SNS
SHDN
GND
1
2
3
4
8
7
6
5
IN
FB
TAP
ERR
1
GND
TAB
2
3
IN
GND OUT
SOP-8 (M)
SOT-223 (S)
3
2
1
TAB
3
2
1
OUT
GND
IN
OUT
GND
IN
TO-92 (Z)
TO-220 (T)
Pin Description
Pin No.
SOT-223
1
2,
TAB
3
Pin No.
SOP-8
8
4
1
2
Pin No.
TO-220
1
2
3
Pin No.
TO-92
1
2
3
Pin Name
IN
GND
OUT
SNS
Pin Function
Supply Input
Ground
Regulator Output
Sense (Input): Output-sense-voltage end of internal resistive
divider. Connect to OUT (V
OUT
= 5V) for fixed 5V 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 5V
applied to SNS, V
TAP
is approximately 1.23V. Connect to
FB for 5V operation. Not used in adjustable configuration.
Feedback (Input): Error amplifier input. Compared to internal
1.23V reference. Connect to external voltage divider for
adjustable operation or internal voltage divider (TAP) for 5V
operation (see SNS, TAP).
3
5
SHDN
ERR
6
TAP
7
FB
MIC2954
2
August 1999
MICREL [ MICREL SEMICONDUCTOR ]
