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Description
The R1121N Series is a voltage regulator IC with high output voltage accuracy, low supply current, low ON resistance, and high ripple rejection by CMOS process. It consists of a voltage reference unit, an error amplifier, resistors, a current limit circuit, and a chip enable circuit. This IC performs with low dropout voltage and a chip enable function, making it suitable for power supply in hand-held communication equipment. It is designed with excellent line and load transient response. The output voltage is fixed with high accuracy. The package for this IC is SOT-23-5 (Mini-mold), allowing for high density mounting on boards.
Specifications and features
- Ultra-Low Supply Current: 35µA (Typ.)
- Standby Mode: 0.1µA (Typ.)
- Low Dropout Voltage: 0.2V (IOUT=100mA) (Typ.)
- High Ripple Rejection: 70dB (f = 1kHz) (Typ.)
- Low Temperature-Drift Coefficient of Output Voltage: ±100ppm/°C (Typ.)
- Excellent Line Regulation: 0.05%/V (Typ.)
- High Accuracy Output Voltage: ±2.0%
- Small Package: SOT-23-5 (Mini-mold)
- Output Voltage: Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.
- Built-in chip enable circuit (2 Types; A: active "L", B: active "H")
- Pinout: Similar to the TK112, TK111
Application Scenarios
The R1121N Series voltage regulator IC is specifically designed for power supply applications in hand-held communication equipment. Its low dropout voltage, high accuracy output voltage, and excellent line and load transient response make it an ideal choice for ensuring stable power supply in such devices.
Comparison
Advantages- High output voltage accuracy
- Low supply current
- Low ON resistance
- High ripple rejection
- Excellent line and load transient response
- Small package for high-density mounting on boards
Disadvantages- Output voltage setting range limited to 1.5V to 5.0V
- Requires a chip enable circuit for operation
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Datasheet
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- Last Updated: 2024/10/01 14:42 +0800
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