Description

The RI41404P-34HK is a VFM (Chopper) Step-Up DC/DC converter IC from the RH5RI××1B/××2B/××3B Series designed by CMOS Process. With just three external components, including an inductor, a diode, and a capacitor, this IC can offer a low ripple, high efficiency Step-Up DC/DC converter. A few other features of this IC include ultra-low supply current, high output voltage accuracy, low ripple and noise, low start-up voltage, high efficiency, low temperature-drift coefficient of output voltage, and small packages.

Specifications and features

• Product Category: IC Chips
• VFM (Chopper) Step-Up DC/DC converter ICs with ultra-low supply current by CMOS process.
• 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.
• Requires only an inductor, a diode, and a capacitor as external components for its construction.
• An ultra-low input current of TYP. 4µA (RH5RI301B/303B at no load, with 1.5V input)
• High Output Voltage Accuracy of ±2.5%
• Low Ripple and Low Noise
• Low Start-Up Voltage (When the output current is 1mA) of MAX. 0.9V
• High Efficiency of TYP.80%
• Low Temperature-Drift Coefficient of Output Voltage of TYP. ±50 ppm/˚C
• Small Packages like SOT-89 (RH5RI××1B, RH5RI××2B) and SOT-89-5 (RH5RI××3B)

Application Scenarios

• Power source for battery-powered equipment.
• Power source for cameras, camcorders, VCRs, PDAs, electronic data banks, and handheld communication equipment.
• Power source for appliances that require a higher cell voltage than the batteries used in the appliances.

Comparison

• Ultra-low input current
• High output voltage accuracy
• Low temperature-drift coefficient of output voltage
• Small packages

• None mentioned