MIC2950/2951
The MIC2950 is available as either an -05 or -06 version. The
-05 and -06 versions are guaranteed for junction temperatures
from –40°C to +125°C; the -05 version has a tighter output and
reference voltage specification range over temperature. The
MIC2951 is available as an -02 or -03 version.
Micrel
The MIC2950 and MIC2951 have a tight initial tolerance
(0.5% typical), a very low output voltage temperature coefficient
which allows use as a low-power voltage reference, and
extremely good load and line regulation (0.04% typical). This
greatly reduces the error in the overall circuit, and is the result
of careful design techniques and process control.
Ordering Information
Part Number
MIC2950-05BZ
MIC2950-06BZ
MIC2951-02BM
MIC2951-03BM
MIC2951-02BN
MIC2951-03BN
MIC2951-03BMM
MIC2951-3.3BM
MIC2951-4.8BM
* junction temperature
Voltage
5.0V
5.0V
5.0V
5.0V
5.0V
5.0V
5.0V
3.3V
4.85V
Accuracy Temperature Range*
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
1.0%
1.0%
1.0%
–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
–40°C to +125°C
Package
TO-92
TO-92
8-pin SOIC
8-pin SOIC
8-pin plastic DIP
8-pin plastic DIP
8-lead MM8™
8-pin SOIC
8-pin SOIC
Pin Configuration
MIC2951-xx
OUT 1
MIC2950-xx
3
2
1
8
7
6
5
IN
FB
TAP
ERR
SNS 2
SHDN 3
IN
OUT
GND
GND 4
TO-92 (Z)
(Bottom View)
DIP (N), SOIC (M), MM8™ (MM)
(Top View)
Pin Description
Pin #
MIC2950
3
Pin #
MIC2951
1
2
3
2
4
5
6
7
1
8
Pin Name
OUT
SNS
SHDN
GND
ERR
TAP
FB
IN
Pin Function
Regulated Output
Sense (Input): Output-voltage sensing end of internal voltage divider for
fixed 5V operation. Not used in adjustable configuration.
Shutdown/Enable (Input): TTL compatible input. High = shutdown,
low or open = enable.
Ground
Error Flag (Output): Active low, open-collector output (low = error,
floating = normal).
3.3V/4.85/5V Tap: Output of internal voltage divider when the regulator is
configured for fixed operation. Not used in adjustable configuration.
Feedback (Input): 1.235V feedback from internal voltage divider’s TAP (for
fixed operation) or external resistor network (adjustable configuration).
Unregulated Supply Input
3-50
February 1999
MICREL [ MICREL SEMICONDUCTOR ]
