LP2951-4.8BM Micrel Semiconductor, LP2951-4.8BM Datasheet - Page 10

• Manufacturer Part Number: LP2951-4.8BM
• Description: 100mA Low-Dropout Voltage Regulator
• Manufacturer: Micrel Semiconductor

LP2950/2951
*MINIMUM INPUT-OUTPUT VOLTAGE RANGES FROM 40mV TO 400mV,
Typical Applications
DEPENDING ON LOAD CURRENT. CURRENT LIMIT IS TYPICALLY 160mA.
* SEE APPLICATIONS INFORMATION
ERROR
OUTPUT
SHUTDOWN
INPUT
Wide Input Voltage Range Current Limiter
VOLTAGE
VOLTAGE
OUTPUT
ERROR
INPUT
Figure 1. ERROR Output Timing
5
3
VALID
NOT
ERROR
SO
GND
*
4.75V
4
LP2951
+V IN
+V IN
1.3V
8
FB
5V
V
OUT
7
1
*V
OUT
*
VALID
NOT
V IN
3-44
NOTE: PINS 2 AND 6 ARE LEFT OPEN
*HIGH INPUT LOWERS V
ERROR
OUTPUT
ON
ON
*SLEEP
INPUT
SHUTDOWN
INPUT
ERROR
OUTPUT
SHUTDOWN
INPUT
5 V Regulator with 2.5 V Sleep Function
OFF
47k
5
3
OFF
Figure 2. Adjustable Regulator
100k
SD
ERROR
5
3
GND
4
OUT
ERROR
SD
MIC2951
LP2951
+V IN
+V IN
TO 2.5V
GND
8
LP2951
4
LP2951
+V
V
8
V
7
FB
OUT
IN
IN
V
FB
REF
V
7
1
OUT
1.23V
C-MOS
GATE
100pF
2N3906
1
*SEE APPLICATIONS
INFORMATION
470 k
R 100
R
V
1.2
1
OUT
2
February 1999
200k
1%
100k
1%
100k
pF
V
x (1 +
OUT
30V
+V OUT
3.3µF
+
= V
R
R
Micrel
1
2
870 23
3.3 F
REF
)