S1721 Datasheet, PDF (1/42 Pages) Seiko Instruments Inc – SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION

S-1721 Series
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION
www.sii-ic.com
LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
© Seiko Instruments Inc., 2007-2010
Rev.2.0_00
S-1721 Series, developed using the CMOS technology, is a 2-channel positive voltage regulator IC which has the low
dropout voltage, the high-accuracy output voltage and the low output current consumption of 150 mA.
Users are able to use a small ceramic capacitor of 1.0 μF for this IC. This IC includes two regulator circuits in the package
SOT-23-6 or super-small SNT-6A.
S-1721 Series has much lower current consumption than S-1711 Series, this IC is ideal for mobile devices.
„ Features
• Output voltage:
1.2 V to 5.0 V, selectable in 0.05 V step.
• A ceramic capacitor of 1.0 μF or more can be used as the I/O capacitor.
• Wide input voltage range:
1.7 V to 6.5 V
• High-accuracy output voltage:
±1.0%
• Low dropout voltage:
• Low current consumption:
130 mV typ. (products having the output of 3.0 V, I_OUT = 100 mA)
During operation: 25 μA typ., 45 μA max. (products having the output of
3.0 V, per circuit)
• Output current:
• High ripple rejection:
During shutdown: 0.1 μA typ., 1.0 μA max.
Possible to output 150 mA (at V_IN ≥ V_OUT(S) + 1.0 V)^*1 (per circuit)
80 dB typ. (products having the output under 1.8 V, at 1.0 kHz)
• Built-in overcurrent protector:
limits overcurrent of output transistor
• Built-in ON/OFF circuit:
Ensures long battery life.
• Pull-up or pull-down resistor can be selected.
• Lead-free, Sn 100%, halogen-free^*2
*1. Attention should be paid to the power dissipation of the package when the output current is large.
*2. Refer to “„ Product Name Structure” for details.
„ Applications
• Power supply for cellular phones
• Power supply for battery-powered devices
„ Packages
• SNT-6A
• SOT-23-6
Seiko Instruments Inc.
1