Power Monitoring Output, 5.5V Input, 100mA CMOS Voltage Regulator With 0.5μA Super Low Current Consumption S-1740/1741 Series

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