3-MODE 300mA LDO REGULATOR
The R1161x Series are CMOS-based voltage regulator ICs with high output voltage accuracy,
low supply
current, and low ON-resistance. Each of these voltage regulator ICs consists of a voltage reference unit, an
error
amplifier, resistors for setting output voltage, a current limit circuit, and a chip enable circuit.
These ICs perform with low dropout voltage and a chip enable function. To prevent
the destruction by over current, current limit circuit is included. The R1161x Series have 3-mode. One
is standby mode with CE or standby control pin. Standby mode realizes ultra small consumption current off
mode. Other two modes are realized with ECO pin TM.
Fast Transient Mode (FT mode) and Low Power Mode (LP mode) are alternative with.
Consumption current is reduced at Low Power Mode compared with Fast Transient Mode. Output voltage is maintained
between FT mode and LP mode.
The output voltage of these ICs is internally fixed with high accuracy. Since the packages for these ICs are SOT-23-5, SON-6, and HSON-6, high density mounting of the ICs on boards is possible. |
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 Ultra-Low
Supply Current |
Typ. 3.5µA
(Low Power Mode, Vout<1.6V),
Typ. 80µA
(Fast Transient Mode, Vout<1.8V)
Typ. 60µA
(Fast Transient Mode, Vout≥1.8V) |
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| Standby
Mode |
Typ. 0.1µA |
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| Low
Dropout Voltage |
Typ. 0.48V (IOUT=300mA Output Voltage=1.0V Type)
Typ. 0.31V (IOUT=300mA Output Voltage=1.5V Type)
Typ. 0.23V (IOUT=300mA Output Voltage=3.0V Type) |
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| High
Ripple Rejection |
Typ. 65dB (f=1kHz, FT Mode) |
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| Low
Temperature-Drift Coefficient of Output Voltage |
Typ. ±100ppm/°C |
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| Excellent
Line Regulation |
Typ. 0.01%/V (at Fast Transient Mode) |
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| High
Output Voltage Accuracy |
±2.0% (±3.0% at LP Mode) |
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| Small
Package |
SOT-23-5 (Super Mini-mold), SON-6, HSON-6 |
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| Output
Voltage |
Stepwise setting with a step of 0.1V in the range of 0.8V to 3.3V is possible |
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| Input
Voltage |
Min. 1.40V (Vout≥1.0V), 1.45V (Vout<1.0V) |
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| Built-in
fold-back protection circuit |
Typ. 50mA (Current at short mode) |
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| External
Capacitors |
CIN=COUT=Tantalum 1.0µF (VOUT<1.0V)
CIN=COUT=Ceramic 1.0µF (VOUT≥1.0V) |
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Precision Voltage References.
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Power source for electrical appliances such as cameras, VCRs and hand-held
communication equipment.
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Power source for battery-powered equipment.
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| * 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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R1161x
Series
