R1170X Datasheet, PDF (1/16 Pages) RICOH electronics devices division – 800mA LDO REGULATOR

2001.Jul.21
800mA LDO REGULATOR
R1170X series
s 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 or HSON6, high density mounting of the ICs on
boards is possible.
s FEATURES
qUltra-Low Supply Current• • • • • • • • TYP. 80µA
qLow Standby Current • • • • • • • • • • • TYP. 0.1µA
qOutput Current • • • • • • • • • • • • • • • MIN. 800mA(VIN=VOUT+1.0V)
qOutput Voltage • • • • • • • • • • • • Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V
qHigh Output Voltage Accuracy• • • • ±2.0%
qLow Dropout Voltage• • • • • • • • • • • • TYP. 0.12V(VOUT=3.0V, IOUT=300mA)
qLine Regulation• • • • • • • • • • • • TYP. 0.05%/V
qSmall Package • • • • • • • • • • • • • • • • SOT-89-5, HSON6
qBuilt-in Current Limit Circuit
qBuilt-in Thermal Shunt Circuit
qLow Temperature-drift Coefficient of Output Voltage • • • • • • • • • TYP.±100ppm/°C
s APPLICATIONS
qLocal Power source for Notebook PC.
qLocal Power source for portable appliances, cameras, and videos.
qLocal Power source for equipment of battery-use.
qLocal Power source for home appliances.
Rev. 1.10
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