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S-1701 Series
www.sii-ic.com
HIGH RIPPLE-REJECTION LOW DROPOUT
CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
© SII Semiconductor Corporation, 2004-2015
Rev.3.1_01
The S-1701 Series, developed based on CMOS technology, is a voltage regulator with a reset function and integrates a
high-accuracy voltage detector with on-chip delay circuit and a positive voltage regulator with a low dropout voltage and high
output voltage on one chip.
The S-1701 Series is available in many types according to the selection of the voltage detector block of the voltage detector,
including a SENSE pin input product. A built-in low on-resistance transistor provides a low dropout voltage and large output
current.
Small ceramic capacitors are available and an external capacitor for delay is needless. Small SOT-23-5 and SOT-89-5
packages realize high-density mounting.
Features
Regulator block
Output voltage:
Input voltage:
Output voltage accuracy:
Current consumption
Output current:
Input and output capacitors:
Ripple rejection:
Built-in overcurrent protection circuit:
Built-in ON/OFF circuit:
1.5 V to 5.0 V, selectable in 0.1 V step
2.0 V to 6.5 V
±1.0%
During power-off: 0.1 μA typ., 1.0 μA max.
Possible to output 400 mA (VIN VOUT(S) + 2.0 V)*1
A ceramic capacitor of 1.0 μF or more can be used.
70 dB typ. (f = 1.0 kHz)
Limits overcurrent of output transistor.
Ensures long battery life.
Detector block
Detection voltage:
1.5 V to 5.5 V, selectable in 0.1 V step
Detection voltage accuracy:
±1.0%
Input voltage:
0.8 V to 6.5 V
Output mode:
Nch open-drain active low output
No need of an external capacitor for delay
Three delay time settings:
No delay (60 μs), 50 ms, 100 ms
Whole regulator
Current consumption
Operation temperature range:
Lead-free, Sn 100%, halogen-free*2
During operation: 85 μA typ.
Ta = 40°C to +85°C
*1. Attention should be paid to the power dissipation of the package when the output current is large.
*2. Refer to “Product Name Structure” for details.
Applications
Constant-voltage power supply and reset circuit for battery-powered device
Constant-voltage power supply for personal communication device
Constant-voltage power supply for home appliance
Packages
SOT-23-5
SOT-89-5
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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
Rev.3.1_01
Block Diagrams
1. S-1701 Series A/B/C/G/H/J types
ON/OFF
Overcurrent
protection circuit
ON/OFF
circuit
+
Reference
voltage circuit
*1
VOUT
ON/OFF pin :
SENSE pin :
Provided
VIN connection
VIN
Reference
voltage circuit
+
Oscillating
counter timer
(Delay circuit)
VSS
VDOUT
*1
*1. Parasitic diode
2. S-1701 Series D/E/F/K/L/M types
ON/OFF
Overcurrent
protection circuit
ON/OFF
circuit
+
Reference
voltage circuit
Figure 1
*1
VOUT
ON/OFF pin :
SENSE pin :
Provided
VOUT connection
VIN
Reference
voltage circuit
*1. Parasitic diode
2
+
Oscillating
counter timer
(Delay circuit)
VSS
VDOUT
*1
Figure 2

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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.3.1_01
S-1701 Series
3. S-1701 Series N/P/Q types
SENSE
Overcurrent
protection circuit
ON/OFF
circuit
+
Reference
voltage circuit
*1
VOUT
ON/OFF pin :
SENSE pin :
VIN connection
Provided
VIN
Reference
voltage circuit
+
Oscillating
counter timer
(Delay circuit)
VSS
VDOUT
*1
*1. Parasitic diode
4. S-1701 Series R/S/T types
SENSE
Overcurrent
protection circuit
ON/OFF
circuit
+
Reference
voltage circuit
Figure 3
*1
VOUT
ON/OFF pin :
SENSE pin :
VDOUT connection
Provided
VIN
Reference
voltage circuit
*1. Parasitic diode
+
Oscillating
counter timer
(Delay circuit)
VSS
VDOUT
*1
Figure 4
3

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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
Rev.3.1_01
5. S-1701 Series U/V/W types
*1
Overcurrent
protection circuit
ON/OFF
circuit
+
Reference
voltage circuit
VOUT
ON/OFF pin :
SENSE pin :
VIN connection
VOUT connection
VIN
Reference
voltage circuit
+
Oscillating
counter timer
(Delay circuit)
VSS
VDOUT
*1
*1. Parasitic diode
6. S-1701 Series X/Y/Z types
Figure 5
*1
Overcurrent
protection circuit
ON/OFF
circuit
+
Reference
voltage circuit
VOUT
ON/OFF pin :
SENSE pin :
VIN connection
VIN connection
VIN
Reference
voltage circuit
*1. Parasitic diode
4
+
Oscillating
counter timer
(Delay circuit)
VSS
VDOUT
*1
Figure 6

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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.3.1_01
S-1701 Series
Product Name Structure
Users can select the product type, output voltage, detection voltage, and package type for the S-1701 Series. Refer to
the “1. Product name” regarding the contents of product name, “2. Function list according to product type” regarding
the product types, “3. Package” regarding the package drawings, and “4. Product name list” regarding details of the
product name.
1. Product name
S-1701 x xx xx - xxxx x
Environmental code
U : Lead-free (Sn 100%), halogen-free
G : Lead-free (for details, please contact our sales office)
Package name (abbreviation) and packing specifications*1
M5T1 : SOT-23-5, Tape
U5T1 : SOT-89-5, Tape
Detection voltage*2
15 to 55
(e.g., when the output voltage is 1.5 V, it is expressed as 15.)
Output voltage
15 to 50
(e.g., when the output voltage is 1.5 V, it is expressed as 15.)
Product type*3
A to Z (I and O are not provided)
*1. Refer to the tape drawing.
*2. In the S-1701D to S-1701F, S-1701K to S-1701M, and S-1701U to S-1701W types (that detect output
voltage), a reset signal may be output due to the under shoot of the output voltage when the input voltage or
load current changes transiently. Therefore, set the detection voltage after sufficient evaluation using actual
devices.
*3. Refer to the “2. Function list according to product type”.
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