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Description
The RH5RI303B-T1 is a VFM (Chopper) Step-up DC/DC converter IC in the RH5RI××1B/××2B/××3B Series. It is designed with ultra low supply current using CMOS process. This IC consists of an oscillator, a VFM control circuit, a driver transistor (Lx switch), a reference voltage unit, an error amplifier, resistors for voltage detection, and an Lx switch protection circuit. With only three external components (an inductor, a diode, and a capacitor), the RH5RI303B-T1 can construct a low ripple, high efficiency step-up DC/DC converter.
Specifications and features
- Small Number of External Components: Only an inductor, a diode, and a capacitor (RH5RI××1B)
- Ultra Low Input Current: TYP. 4µA (RH5RI301B/303B at no load, with 1.5V input)
- High Output Voltage Accuracy: ±2.5%
- Low Ripple and Low Noise
- Low Start-up Voltage (When the output current is 1mA): MAX. 0.9V
- High Efficiency: TYP. 80%
- Low Temperature-Drift Coefficient of Output Voltage: TYP. ±50 ppm/˚C
- Small Packages: SOT-89 (RH5RI××1B, RH5RI××2B), SOT-89-5 (RH5RI××3B)
Application Scenarios
The RH5RI303B-T1 is commonly used as a power source for battery-powered equipment such as cameras, camcorders, VCRs, PDAs, electronic data banks, and hand-held communication equipment. It is also suitable for appliances that require a higher cell voltage than that of batteries used in the appliances.
Comparison
Advantages- Small number of external components required.
- Ultra low input current.
- High output voltage accuracy.
- Low ripple and low noise.
- Low start-up voltage.
- High efficiency.
- Low temperature-drift coefficient of output voltage.
- Compact and small package sizes.
Disadvantages- None noted.
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Datasheet
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Shopping guide
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Popular parts of the same kind
- Datasheet: Download RH5RI303B-T1
- Chipdatas Part: CD86-RH5RI303B-T1
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/01 09:09 +0800
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