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S1172 Datasheet, PDF (1/35 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT | |||
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S-1172 Series
www.sii-ic.com
© Seiko Instruments Inc., 2007-2015
HIGH RIPPLE-REJECTION LOW DROPOUT
HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.2_01
The S-1172 Series, developed by using CMOS technology, is a positive voltage regulator with a super low dropout voltage,
high-accuracy output voltage and low current consumption.
The S-1172 Series provides the very low dropout voltage and the large output current due to the built-in transistor with low
on-resistance. The S-1172 Series includes an overcurrent protection circuit that prevents the load current from exceeding
the current capacitance of the output transistor, a thermal shutdown circuit that prevents damage due to overheating, and
an inrush current limit circuit to limit the excessive inrush current generated at power-on.
The ON/OFF circuit ensures longer battery life. Compared with the voltage regulators using the conventional CMOS
technology, a large variety of capacitors are available, including small ceramic capacitors.
High heat radiation HSOP-6 and small SOT-89-5 packages realize high-density mounting.
ï® Features
⢠Output voltage:
⢠Input voltage:
⢠Output voltage accuracy:
⢠Dropout voltage:
⢠Current consumption:
⢠Output current:
⢠Input and output capacitors:
⢠Ripple rejection:
⢠Built-in overcurrent protection circuit:
⢠Built-in thermal shutdown circuit:
⢠Built-in inrush current limit circuit:
⢠Built-in ON/OFF circuit:
⢠Operation temperature range:
⢠Lead-free, Sn 100%, halogen-free*2
1.0 V to 5.0 V, selectable in 0.05 V step
1.5 V to 5.5 V
±1.0% (1.0 V to 1.45 V output product: ±15 mV)
70 mV typ. (3.0 V output product, IOUT = 300 mA)
During operation: 70 μA typ., 90 μA max. (3.0 V output product)
During power-off: 0.1 μA typ., 1.0 μA max.
Possible to output 1000 mA (3.0 V output product, VIN ⥠VOUT(S) + 1.0 V)*1
A ceramic capacitor of 4.7 μF or more can be used.
70 dB typ. (1.0 V output product, f = 1.0 kHz)
Limits overcurrent of output transistor.
Prevents damage caused by heat.
Limits excessive inrush current at power-on.
Ensures Long battery life.
Ta = â40°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 âï® Product Name Structureâ for details.
ï® Applications
⢠Constant-voltage power supply for battery-powered device
⢠Constant-voltage power supply for TV, notebook PC and home electric appliance
⢠Constant-voltage power supply for portable equipment
ï® Packages
⢠SOT-89-5
⢠HSOP-6
Seiko Instruments Inc.
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