S-1741G18-A4T2U4 datasheet(1/47 Pages) SII

Part #	S-1741G18-A4T2U4

Description	POWER MONITORING OUTPUT, 5.5 V INPUT, 100 mA CMOS VOLTAGE REGULATOR WITH 0.5 uA SUPER LOW CURRENT CONSUMPTION

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Manufacturer	SII [Seiko Instruments Inc]

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S-1740/1741 Series

POWER MONITORING OUTPUT,

5.5 V INPUT, 100 mA CMOS VOLTAGE REGULATOR

WITH 0.5

μA SUPER LOW CURRENT CONSUMPTION

www.sii-ic.com

Rev.1.2_00

1

The S-1740/1741 Series, developed using CMOS technology, is a positive voltage regulator with a power monitoring 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 power monitoring output is prepared in the S-1740/1741 Series. The power monitoring 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:

VOUT = 1.0 V to 3.5 V, selectable in 0.05 V step

• Input voltage:

VIN = 1.5 V to 5.5 V

• Output voltage accuracy:

±1.0% (1.0 V to 1.45 V output product: ±15 mV) (Ta = +25°C)

• Dropout voltage:

20 mV typ. (2.5 V output product, at IOUT = 10 mA) (Ta =

+25°C)

• Current consumption during operation:

ISS1 = 0.35

μA typ. (Ta = +25°C)

• Output current:

Possible to output 100 mA ( at VIN

≥ VOUT(S) + 1.0 V)

*1

• Input capacitor:

A ceramic capacitor can be used. (1.0

μF or more)

• Output capacitor:

A ceramic capacitor can be used. (1.0

μF to 100 μF)

• Built-in overcurrent protection circuit:

Limits overcurrent of output transistor.

Power monitor block

• Output voltage:

VPMOUT = VIN/2 (S-1740 Series)

VPMOUT = VIN/3 (S-1741 Series)

• Current consumption during operation:

ISS1P = 0.15

μA typ. (Ta = +25°C)

• Output capacitor:

A ceramic capacitor can be used. (100 nF to 220 nF)

• Built-in enable circuit:

Ensures long battery life.

Overall

• Operation temperature range:

Ta =

−40°C to +85°C

• Lead-free (Sn 100%), halogen-free

*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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