R1170H Series
800mA LDO Regulator for Automotive Applications
NO.EC-084-131206
OUTLINE
The R1170x Series are positive voltage regulator ICs by CMOS process. The R1170x Series have features of
high ripple rejection, low dropout voltage, high output voltage accuracy, and 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 R1170x Series are suitable for various power sources for portable appliances.
This device is packaged in SOT-89-5 that achieves high-density mounting on boards.
FEATURES
• Input Voltage Range (Maximum Rating)...................... Max. 6V (7.0V)
• Supply Current............................................................. Typ. 80μA
• Standby Current........................................................... Typ. 0.1μA
• Output Current ............................................................. Min. 800mA (VIN=VOUT+1.0V)
• Dropout Voltage ........................................................... Typ. 0.12V (VOUT=3.0V, IOUT=300mA)
• Output Voltage Accuracy.............................................. ±2.0%
• Temperature-Drift Coefficient of Output Voltage.......... Typ.±100ppm/°C
• Line Regulation............................................................ Typ. 0.05%/V
• Output Voltage ............................................................. 1.5V to 5.0V (0.1V steps)
• Ripple Rejection........................................................... TYP. 50 dB
• Package ....................................................................... SOT-89-5
• Built-in Current Limit Circuit
• Built-in Thermal Shutdown Circuit
• Ceramic capacitors are recommended to be used with this IC
APPLICATIONS
• Power source for accessories such as car audios, car navigation systems, and ETC systems
• Power source for ECUs such as EV inverter and battery charge control unit
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