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Description
The R1121N321B-TR is a voltage regulator IC from the R1121N Series. It is designed using CMOS process and offers high output voltage accuracy, low supply current, low ON resistance, and high ripple rejection. This IC consists of a voltage reference unit, an error amplifier, resistors, a current limit circuit, and a chip enable circuit. It has a low dropout voltage and a chip enable function. The R1121N321B-TR is suitable for power supply applications in hand-held communication equipment, thanks to its excellent line and load transient response. It comes in a SOT-23-5 (Mini-mold) package, allowing for high density mounting on boards.
Specifications and Features
- Ultra-Low Supply Current: TYP. 35µA
- Standby Mode: TYP. 0.1µA
- Low Dropout Voltage: TYP. 0.2V (IOUT=100mA)
- High Ripple Rejection: TYP. 70db (f = 1kHz)
- Low Temperature-Drift Coefficient of Output Voltage: TYP. ±100ppm/°C
- Excellent Line Regulation: TYP. 0.05%/V
- 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 R1121N321B-TR IC is primarily used as a power supply component in hand-held communication equipment. Its low dropout voltage, high ripple rejection, and excellent line regulation make it ideal for such applications.
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
- Stepwise output voltage setting
- Built-in chip enable circuit
Disadvantages- Output voltage range limited to 1.5V to 5.0V
- Package type may not be suitable for all applications
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Similar parts: 430483 , Click to view
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Datasheet
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Popular parts of the same kind
- Datasheet: Download R1121N321B-TR
- Chipdatas Part: CD94-R1121N321B-TR
- Warehouse: China, Hong Kong
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- Last Updated: 2024/09/28 22:52 +0800
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