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R1170H3.8A-T1

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R1170H3.8A-T1 数据手册

2002.Apr.1

800mA LDO REGULATOR

R1170X series

■ OUTLINE

The R1170 Series are positive voltage regulator ICs by CMOS process. The R1170 Series have features of

high ripple rejection, low dropout voltage, high output voltage accuracy, low consumption current. Each of these ICs

consists of a voltage reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at

short mode, a chip enable circuit, and thermal-shunt circuit. Output Voltage of R1170 is fixed in the IC.

Low consumption current by the merit of CMOS process and built-in transistors with low ON-resistance make

low dropout voltage and chip enable function prolong the battery life. These regulators are remarkable improvement

on the current regulators in terms of ripple rejection, input transient response, and load transient response.

Maximum Output Current is large for its compact size.

Thus, the R1170 Series are suitable for various power sources for portable appliances.

Since the packages for these ICs are the SOT-89-5 package, HSON6, or SC-84(Under Development), high

density mounting of the ICs on boards is possible.

■ FEATURES

■Ultra-Low Supply Current^{• • • • • • • •}TYP. 80µA

■Low Standby Current ^{• • • • • • • • • • •}TYP. 0.1µA

■Output Current ^{• • • • • • • • • • • • • • •}MIN. 800mA(VIN=VOUT+1.0V)

■Output Voltage ^{• • • • • • • • • • • •}Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V

■High Output Voltage Accuracy^{• • • •}±2.0%

■Low Dropout Voltage^{• • • • • • • • • • • •}TYP. 0.12V(VOUT=3.0V, IOUT=300mA)

■Line Regulation^{• • • • • • • • • • • •}TYP. 0.05%/V

■Small Package ^{• • • • • • • • • • • • • • • •}SOT-89-5, HSON6, SC-84(Under Development)

■Built-in Current Limit Circuit

■Built-in Thermal Shunt Circuit

■Low Temperature-drift Coefficient of Output Voltage ^{• • • • • • • • •}TYP.±100ppm/°C

■ APPLICATIONS

■Local Power source for Notebook PC.

■Local Power source for portable appliances, cameras, and videos.

■Local Power source for equipment of battery-use.

■Local Power source for home appliances.

Rev. 1.11

- 1 -

12 3 4 5 6 7...20

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