S-1702 Datasheet, PDF (1/45 Pages) Seiko Instruments Inc – Built-in overcurrent protection circuit

S-1702 Series
SUPER-LOW CURRENT CONSUMPTION 150 mA VOLTAGE REGULATOR WITH
www.sii-ic.com
BUILT-IN HIGH-ACCURACY VOLTAGE DETECTOR AND RESET INPUT FUNCTION
© SII Semiconductor Corporation, 2008-2015
Rev.2.2_01
The S-1702 Series, developed based on CMOS technology, is a 150 mA output positive voltage regulator with a low
dropout voltage, a high-accuracy output voltage, and low current consumption.
The S-1702 Series includes a voltage regulator with high-accuracy output voltage of ±1.0% allowing to use a ceramic
capacitor of 1.0 μF or more, and a voltage detector that monitors the output/input voltage of the regulator. It also includes
an overcurrent protection circuit that prevents the output current from exceeding the current capacitance of the output
transistor and an output forcible discharge circuit for the regulator operation off.
Small SNT-6A package is available for the S-1702 Series. And an external small capacitor can be used, enabling
high-density mounting. Its super-low current consumption makes the S-1702 Series ideal for mobile devices.
 Features
Regulator block
• Output voltage:
• Output voltage accuracy:
• Current consumption:
• Output current:
• Built-in overcurrent protection circuit:
• Built-in ON / OFF forcible discharge circuit:
• Ripple rejection:
1.5 V to 5.5 V, selectable in 0.05 V step
±1.0%
Current consumption of regulator block: 9 μA typ., 16 μA max.
Possible to output 150 mA (VIN ≥ VOUT(S) + 1.0 V)^*1
Limits overcurrent of output transistor.
Ensures long battery life, discharges output load instantaneously.
70 dB typ. (f = 1.0 kHz)
Detector block
• Detection voltage:
• Built-in high-accuracy voltage detection circuit:
• External reset input:
1.3 V to 5.2 V, selectable in 0.05 V step
±1.0%
Monitoring output/input or monitoring external input by option
(detector output)
Forcible assertion of detector output by external reset pin
(RESX) input
Overall
• Correlation temperature gradient in the regulator and the detector blocks
• Current consumption:
During operation^*2: 10 μA typ., 18 μA max.
• Operation temperature range:
Ta = −40°C to +85°C
• Lead-free (Sn 100%), halogen-free
*1. Attention should be paid to the power dissipation of the package when the output current is large.
*2. Excluding current flowing in pull-up and pull-down resistors connected to the ON / OFF or RESX pins
 Applications
• Wireless power supply circuit block for cellular phone
• Power supply circuit block for health care product
• Power supply circuit block for various mobile device
 Package
• SNT-6A
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