SI91821 Datasheet, PDF (5/10 Pages) Vishay Siliconix – Micropower 300-mA CMOS LDO Regulator With Error Flag

BLOCK DIAGRAM
Si91821
Vishay Siliconix
2
V_IN
C_IN
2.2 mF
5 SET
6
C_NOISE
Switches shown for device in normal operating mode (SD = HIGH)
7
SD
ON
OFF
6 MW
RFB2
RFB1
+
−
To V_IN
60 mV
+
2 mA
+
−
3
GND
+
1.215 V
−
V_{REF −}
+
Figure 5. 300-mA CMOS LDO Regulator
1, 4
C_OUT
2.2 mF
8
V_OUT
R_EXT
ERROR
2
V_IN
C_IN
2.2 mF
5 SET
7
SD
ON
OFF
6 MW
6
C_NOISE
+
−
To V_IN
60 mV
+
2 mA
+
−
V_SET
1, 4
C_OUT
2.2 mF
3
GND
Document Number: 71614
S-51147–Rev. E, 20-Jun-05
+
1.215 V
−
8
V_{REF −}
+
Figure 6. 300-mA CMOS LDO Regulator (Adjustable Output)
R₂
R₁
V_OUT
R_EXT
ERROR
www.vishay.com
5