2.0A/1.5A LDO REGULATOR
The R1171x Series are CMOS-based positive voltage regulator ICs. The R1171x Series
have features of 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, thermal shutdown circuit. The output voltage of R1171
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 prolongs the battery life. These regulators are remarkable improvement
on the current regulators in terms of input transient response, and load transient response.
Thus, the R1171x Series are suitable for various power sources.
Since the packages for these ICs are high wattage
HSOP-6J package, TO 252-5, high density mounting of the ICs on boards is possible. |
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 Supply
Current |
Typ. 130µA |
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| Standby
Current |
Typ. 0.1µA |
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| Output
Current |
Min. 1.5A (VIN=VOUT+1.0V, R1171Sxxx1A/B)
Min. 2.0A (VIN=VOUT+1.0V, R1171Jxxx1C/D) |
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| Input
Voltage |
2.1V to 6.0V |
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| Output
Voltage |
1.5V to 5.0V (R1171Sxxx1A/B)
1.8V to 5.0V (R1171Jxxx1C/D) |
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| Output
Voltage Accuracy |
± 2.0% |
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| Low
Dropout Voltage |
Typ. 0.09V (VOUT=3.0V, IOUT=300mA) |
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Low
Temperature-drift Coefficient of Output Voltage |
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Typ. ± 100ppm/°C |
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| Line
Regulation |
Typ. 0.05%/V |
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| Packages |
HSOP-6J, TO-252-5 |
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| Built-in
Current Limit Circuit |
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| Built-in
Thermal Shutdown Circuit |
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Ceramic
capacitor for phase compensation |
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CIN=COUT=Ceramic 10µF (VOUT<1.8V)
CIN=COUT=Ceramic 4.7µF (VOUT≥1.8V ) |
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Local Power source for Notebook PC.
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Local Power source for portable appliances,
cameras, and videos. |
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Local Power source for equipment of battery-use. |
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Local Power source for home appliances. |
| * All PDF files are less than 1MB unless otherwise stated. |
| * If you don't have Adobe Reader, you can download free. |
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Technical Info.
Technical Information on Ricoh Power Management ICs.
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Product Catalog
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| Selection guide is available for download in PDF format. |
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R1171x
Series
