s-1313a13-n4t1u3 Seiko Instruments Inc., s-1313a13-n4t1u3 Datasheet - Page 19

• Manufacturer Part Number: s-1313a13-n4t1u3
• Description: S-1313 Series Voltage Regulator
• Manufacturer: Seiko Instruments Inc.

Rev.1.0
SUPER LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Operation
1. Basic operation
2. Output transistor
Figure 17 shows the block diagram of S-1313 Series.
The error amplifier compares the reference voltage (V
feedback resistors R
not influenced by the input voltage and temperature change, to the output transistor.
In the S-1313 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that V
current flowing from the VOUT pin through a parasitic diode to the VIN pin.
_00
OUT
*1. Parasitic diode
Current
VSS
does not exceed V
VIN
supply
s
and R
Reference voltage
V
ref
f
. It supplies the gate voltage necessary to maintain the constant output voltage which is
circuit
IN
+ 0.3 V to prevent the voltage regulator from being damaged due to inverse
−
+
amplifier
Seiko Instruments Inc.
Error
Figure 17
ref
) with V
fb
, which is the output voltage resistance-divided by
R
R
s
f
V
*1
fb
VOUT
S-1313 Series
19