S-1701A3327-U5T1G Seiko Instruments, S-1701A3327-U5T1G Datasheet - Page 40
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S-1701A3327-U5T1G
Manufacturer Part Number
S-1701A3327-U5T1G
Description
IC DETECT/REG 400MA 3.3V SOT89-5
Manufacturer
Seiko Instruments
Datasheet
1.S-1701A1815-M5T1G.pdf
(71 pages)
Specifications of S-1701A3327-U5T1G
Applications
Converter, Battery Powered Devices
Voltage - Input
2 ~ 6.5 V
Number Of Outputs
1
Voltage - Output
3.3V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-89-5
Polarity
Positive
Input Voltage Max
6.5 V
Output Voltage
3.3 V
Output Type
Fixed
Dropout Voltage (max)
0.21 V at 100 mA
Output Current
0.4 A
Line Regulation
0.2 % / V
Load Regulation
40 mV
Voltage Regulation Accuracy
1 %
Maximum Power Dissipation
1000 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
40
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
Regulator block
1. Basic operation
2. Output transistor
Operation
Figure 34 shows the block diagram of the regulator block.
The error amplifier compares the reference voltage (V
feedback resistors R
output voltage free of any fluctuations of input voltage and temperature.
Output voltage is selectable from the range of 1.5 to 5.0 V in the S-1701 Series.
The S-1701 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.
OUT
*1. Parasitic diode
Current
supply
VSS
does not exceed V
VIN
s
Reference voltage
and R
V
ref
circuit
f
. It supplies the output transistor with the gate voltage necessary to ensure a certain
Figure 34 Block Diagram (Regulator Block)
IN
Error amplifier
+ 0.3 V to prevent the voltage regulator from being damaged due to inverse
−
+
Seiko Instruments Inc.
ref
) with V
fb
, which is the output voltage resistance divided by
R
R
s
f
V
*1
fb
VOUT
Rev.3.0
_00