MIC2954 Micrel Semiconductor, MIC2954 Datasheet - Page 2

• Manufacturer Part Number: MIC2954
• Description: 250mA Low-Dropout Regulator
• Manufacturer: Micrel Semiconductor

MIC2954
Ordering Information
Pin Configuration
Pin Description
MIC2954
SOT-223
Pin No.
2,
1
3
TAB
SHDN
Pin No.
GND
SOP-8
OUT
SNS
OUT
8
4
1
2
3
5
6
7
1
2
3
4
SOP-8 (M)
Part Number
MIC2954-02BT
MIC2954-03BT
MIC2954-02BS
MIC2954-03BS
MIC2954-02BZ
MIC2954-03BZ
MIC2954-07BM
MIC2954-08BM
TO-92 (Z)
Pin No.
TO-220
MIC2954
3
1
2
3
GND
2
1
8
7
6
5
Pin No.
TO-92
1
2
3
IN
FB
TAP
ERR
IN
Accuracy
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
Pin Name
SHDN
GND
OUT
SNS
ERR
TAP
FB
IN
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
2
Pin Function
Supply Input
Ground
Regulator Output
Sense (Input): Output-sense-voltage end of internal resistive
divider. Connect to OUT (V
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
(Low = error, floating = normal.)
Divider Tap (Output): Resistive voltage divider tap. With 5V
applied to SNS, V
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).
TAP
is approximately 1.23V. Connect to
Package
SOT-223
SOT-223
IN
TO-220
TO-220
1
SOP-8
SOP-8
TO-92
TO-92
SOT-223 (S)
TO-220 (T)
OUT
OUT
GND
GND
TAB
) undervoltage condition.
2
= 5V) for fixed 5V operation;
OUT
3
August 1999
3
2
1
OUT
GND
IN
Micrel