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Description
The R5323x Series is a CMOS-based voltage regulator IC with high output voltage accuracy, low supply current, low dropout, and high ripple rejection. It 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 due to a built-in transistor with low ON resistance, and a chip enable function prolongs the battery life of each system. The line and load transient responses of the R5323x Series are excellent, making them suitable for the power supply of handheld communication equipment. The output voltage is internally fixed with high accuracy, and the ICs are available in SOT-23-6, PLP1820-6, and WL-CSP-6 packages, allowing for high density mounting on boards.
Specifications and features
The R5323x Series features:
- Low Supply Current: Typ. 90µA (VR1, VR2)
- Standby Mode: Typ. 0.1µA (VR1, VR2)
- Low Dropout Voltage: Typ. 0.22V (IOUT=150mA, Output Voltage Type)
- High Ripple Rejection: Typ. 75dB (VOUT<=2.4V), Typ. 70dB (VOUT<=2.5V) (f=1kHz), Typ. 65dB (VOUT<=2.4V), Typ. 60dB (VOUT<=2.5V) (f=10kHz)
- Low Temperature-drift Coefficient of Output Voltage: Typ. ±100ppm/°C
- Excellent Line Regulation: Typ. 0.02%/V
- High Output Voltage Accuracy: ±2.0%
- Small Packages: SOT-23-6, PLP1820-6, WL-CSP-6
- Output Voltage Stepwise Setting: Step of 0.1V in the range of 1.5V to 4.0V
- Built-in Chip Enable Circuit (A/B: active high)
- Built-in Fold-back Protection Circuit: Typ. 40mA (Current at short mode)
- Ceramic Capacitor Recommended: 1.0µF or more
Application Scenarios
The R5323x Series is suitable for the following applications:
- Power source for handheld communication equipment
- Power source for electrical appliances such as cameras, VCRs, and camcorders
- Power source for battery-powered equipment
Comparison
Advantages:
- High output voltage accuracy
- Low supply current
- Low dropout voltage
- High ripple rejection
- Excellent line and load transient responses
- Small packages for high density mounting
- Stepwise output voltage setting
- Built-in chip enable and fold-back protection circuits
- Ceramic capacitor recommended
Disadvantages:
- No major disadvantages
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Datasheet
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- Datasheet: Download R5323K001B-TR
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