S-1132 Seiko Instruments, S-1132 Datasheet - Page 13

• Manufacturer Part Number: S-1132
• Description: High Ripple Rejection Low Dropout Middle Output Current CMOS Voltage Regulator
• Manufacturer: Seiko Instruments

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DataSheet
4
Rev.2.0
U
Operation
.com
1. Basic operation
2. Output transistor
Figure 13 shows the block diagram of the S-1132 Series.
The error amplifier compares the reference voltage (V
feedback resistors R
output voltage free of any fluctuations of input voltage and temperature.
The S-1132 Series uses a low on-resistance P-channel MOS FET as the output transistor.
Be sure that V
current flowing from the VOUT pin through a parasitic diode to the VIN pin.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
_00
OUT
does not exceed V
s
and R
*1.
VSS
VIN
Current
supply
f
. It supplies the output transistor with the gate voltage necessary to ensure a certain
Parasitic diode
Reference
V
ref
voltage
IN
+ 0.3 V to prevent the voltage regulator from being damaged due to inverse
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amplifier
−
+
Seiko Instruments Inc.
Error
Figure 13
ref
) with V
R
R
fb
s
, which is the output voltage resistance-divided by
f
V
*1
fb
VOUT
S-1132 Series
13