RICOH R1171x SERIES 2.0A 1.5A LDO REGULATOR Data Manual
Summary
The R1171x Series is a high-performance CMOS LDO voltage regulator featuring low dropout voltage, high accuracy, and minimal standby power consumption. Designed to extend battery life, these regulators are ideal for portable electronic applications, including notebook PCs, cameras, and home appliances. This manual provides comprehensive technical details, covering electrical characteristics, package options (HSOP-6J/TO-252), pin configurations, and application guidelines for engineers selecting optimal stable power solutions.
Page 1 Text Content
R1171x SERIES
2.0A/1.5A LDO REGULATOR
NO. EA-125-111027
OUTLINE The R1171x Series are CMOS-based positive voltage regulator ICs. The R1171x Series have features of 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 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-P1, high density mounting of the ICs on boards is possible.
FEATURES • Supply Current Typ. 130μA • Standby Current Typ. 0.1μA • Output Current Min. 1.5A (VIN=VOUT+1.0V, R1171Sxx1A/B)
Min. 2.0A (VIN=VOUT+1.0V, R1171Jxx1C/D)
• Input Voltage 2.1V to 6.0V • Output Voltage 1.5V to 5.0V (0.1V steps) (R1171Sxx1A/B)
1.8V to 5.0V (0.1V steps) (R1171Jxx1C/D)
(For other voltages, please refer to MARK INFORMATIONS.) • Output Voltage Accuracy.............................................. ± 2.0% • Dropout Voltage Typ. 0.09V (VOUT=3.0V, IOUT=300m A) • Temperature-drift Coefficient of Output Voltage........... Typ. ± 100ppm/°C • Line Regulation Typ. 0.05%/V • Packages HSOP-6J, TO-252-5-P1 • Built-in Current Limit Circuit • Built-in Thermal Shutdown Circuit • Ceramic capacitor for phase compensation CIN=COUT=Ceramic 10μF (VOUT<1.8V) CIN=COUT=Ceramic 4.7μF (VOUT 1.8V)
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.
Page Summary Contents For RICOH R1171x SERIES 2.0A 1.5A LDO REGULATOR Data Manual
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 24 |
| File Size | 514.85 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What capacitors are required for phase compensation?
A ceramic capacitor must be used: 10μF if VOUT < 1.8V, or 4.7μF if VOUT ≥ 1.8V.
How does the regulator handle overheating and overcurrent conditions?
The R1171x Series features built-in thermal shutdown circuitry and a current limit circuit at short mode for protection.
What is the approximate standby power consumption?
The typical measured standby current is 0.1μA, which helps prolong the battery life of connected devices.