S-1711A2626-I6T1G Seiko Instruments Inc., S-1711A2626-I6T1G Datasheet - Page 20

• Manufacturer Part Number: S-1711A2626-I6T1G
• Description: Super-small Package 2-circuit High Ripple-rejection Low Dropout Cmos Voltage Regulator
• Manufacturer: Seiko Instruments Inc.

20
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1711 Series
Operation
1. Basic operation
2. Output transistor
The error amplifier compares the reference voltage (V
feedback resistors R
output voltage free of any fluctuations of input voltage and temperature.
The S-1711 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.
Figure 23 shows the block diagram of the S-1711 Series.
OUT
*1. Parasitic diode
Current
VSS
VIN
supply
does not exceed V
s
Reference voltage
and R
V
ref
circuit
f
. It supplies the output transistor with the gate voltage necessary to ensure a certain
IN
+ 0.3 V to prevent the voltage regulator from being damaged due to inverse
−
+
amplifier
Error
Seiko Instruments Inc.
Figure 23
ref
) with V
fb
, which is the output voltage resistance-divided by
R
R
s
f
V
*1
fb
VOUT
Rev.2.5
_00