Document
S-1740/1741 Series
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5.5 V INPUT, 100 mA VOLTAGE REGULATOR WITH SUPPLY VOLTAGE DIVIDED OUTPUT
Rev.1.3_00
The S-1740/1741 Series, developed using CMOS technology, is a positive voltage regulator with the supply voltage divided output, which features super low current consumption and low dropout voltage. The regulator block has low current consumption of 0.35 μA typ. and high-accuracy output voltage of ±1.0%. The function of the supply voltage divided output is prepared in the S-1740/1741 Series. The supply voltage divided output is a function that divides the input voltage (VIN) of the regulator into VIN/2 or VIN/3 and outputs the voltage. For example, this function makes it possible that the IC connects to a low voltage microcontroller A/D converter directly and the microcontroller monitors a battery voltage.
Features
Regulator block • Output voltage: • Input voltage: • Output voltage accuracy: • Dropout voltage: • Current consumption during operation: • Output current: • Input capacitor: • Output capacitor: • Built-in overcurrent protection circuit:
VOUT = 1.0 V to 3.5 V, selectable in 0.05 V step VIN = 1.5 V to 5.5 V ±1.0% (1.0 V to 1.45 V output product: ±15 mV) (Ta = +25°C) 20 mV typ. (2.5 V output product, at IOUT = 10 mA) (Ta = +25°C) ISS1 = 0.35 μA typ. (Ta = +25°C) Possible to output 100 mA ( at VIN ≥ VOUT(S) + 1.0 V)*1 A ceramic capacitor can be used. (1.0 μF or more) A ceramic capacitor can be used. (1.0 μF to 100 μF) Limits overcurrent of output transistor.
Supply voltage divider block • Output voltage:
• Current consumption during operation: • Output capacitor: • Built-in enable circuit:
VPMOUT = VIN/2 (S-1740 Series) VPMOUT = VIN/3 (S-1741 Series) ISS1P = 0.15 μA typ. (Ta = +25°C) A ceramic capacitor can be used. (100 nF to 220 nF)
Ensures long battery life.
Overall • Operation temperature range: • Lead-free (Sn 100%), halogen-free
Ta = −40°C to +85°C
*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.
Applications
• Constant-voltage power supply and battery voltage monitoring support for battery-powered device • Constant-voltage power supply for portable communication device, digital camera, and digital audio player • Constant-voltage power supply for home electric appliance
Packages
• SOT-23-5 • HSNT-6(1212) • HSNT-4(1010)
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5.5 V INPUT, 100 mA VOLTAGE REGULATOR WITH SUPPLY VOLTAGE DIVIDED OUTPUT
S-1740/1741 Series
Rev.1.3_00
Block Diagram
1. S-1740/1741 Series A / C type (SOT-23-5, HSNT-6(1212))
VIN SW
*1
Overcurrent protection circuit + −
VOUT PMOUT
PMEN VSS
Enable circuit
+
−
Reference voltage circuit
Product Type S-1740 Series A type S-1740 Series C type S-1741 Series A type S-1741 Series C type
*1. Parasitic diode
Output Voltage (VPMOUT) VIN/2 VIN/3
PMEN Pin Logic Active "H" Active "L" Active "H" Active "L"
Figure 1
2
5.5 V INPUT, 100 mA VOLTAGE REGULATOR WITH SUPPLY VOLTAGE DIVIDED OUTPUT
Rev.1.3_00
S-1740/1741 Series
2. S-1740/1741 Series G type (HSNT-4(1010))
*1
VIN
Overcurrent protection circuit + −
VOUT PMOUT
VSS
+ −
Reference voltage circuit
Product Type S-1740 Series G type S-1741 Series G type
*1. Parasitic diode
Output Voltage (VPMOUT) VIN/2 VIN/3
PMEN Pin Logic Without PMEN pin
Figure 2
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5.5 V INPUT, 100 mA VOLTAGE REGULATOR WITH SUPPLY VOLTAGE DIVIDED OUTPUT
S-1740/1741 Series
Rev.1.3_00
Product Name Structure
Users can select supply voltage divider block output voltage, product type, regulator block output voltage, and package type for the S-1740/1741 Series. Refer to "1. Product name" regarding the contents of product name, "2. Function list of product type" regarding the product type, "3. Packages" regarding the package drawings and "4. Product name list" for details of product names.
1. Product name
S-174x x xx - xxxx U 4
Environmental code U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1 M5T1: SOT-23-5, Tape A6T2: HSNT-6(1212), Tape A4T2: HSNT-4(1010), Tape*2
Regulator block output voltage*3 10 to 35 (e.g., when the output voltage is 1.0 V, it is expressed as 10.)
Product type*4 A, C, G
Supply voltage divider block output voltage*4 0: VIN/2 1: VIN/3
*1. Refer to the tape drawing. *2. Only S-1740/1741 Series G type *2. Contact our sales office when the product which has 0.05 V step is necessary. *3. Refer to "2. Function list of product type" and "2. 2 PMEN pin" in "2. Supply voltage divider
block" in " Operation".
2. Function list of product type
Product Type S-1740 Series A type S-1740 Series C type S-1740 Series G type S-1741 Series A type S-1741 Series C type S-1741 Series G type
Table 1 Output Voltage (VPMOUT)
VIN/2
VIN/3
PMEN Pin Logic Active "H" Active "L"
Without PMEN pin Active "H" Active "L"
Without PMEN pin
Package
HSNT-6(1212), SOT-23-5 HSNT-4(1010) HSNT-6(1212.