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Description
The R1224N502E-F is a CMOS-based PWM step-down DC/DC converter controller that belongs to the R1224N series of IC chips. It is specially designed for low supply current and provides efficient and low ripple step-down DC/DC conversion. The controller consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, a phase compensation circuit, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, a chip enable circuit, and resistors for output voltage detect and input voltage detect circuit. The output voltage of the R1224N502E-F can be fixed or adjusted with external resistors. This IC chip can easily constitute a step-down DC/DC converter with only several external components, such as a power-transistor, an inductor, a diode, and capacitors.
Specifications and features
- Supply Current: Typ. 20µA
- Standby Current: Typ. 0µA
- Input Voltage Range: 2.3V~18.5V
- Output Voltage Range: 1.2V to 6.0V (R1224Nxx2x), 1.0V to VIN (R1224N102x)
- Output Voltage Accuracy: ±2.0%
- Oscillator Frequency: Typ. 180kHz (R1224Nxx2M, R1224N102M), Typ. 300kHz (R1224Nxx2E/G, R1224N102G), Typ. 500kHz (R1224Nxx2F/H, R1224N102H)
- Efficiency: Typ. 90%
- Low Temperature-Drift Coefficient of Output Voltage: Typ. ±100ppm/°C
- Package: SOT-23-5
- Built-in Soft-start Function: Typ. 10ms
- Built-in Current Limit Circuit
Application Scenarios
The R1224N502E-F can be applied as a power source for hand-held communication equipment, cameras, video instruments such as VCRs and camcorders, battery-powered equipment, and household electrical appliances.
Comparison
Advantages- Low ripple, high efficiency step-down DC/DC conversion
- Low supply current design
- Wide input voltage range
- Fixed or adjusted output voltage with external resistors
- Built-in protection circuit, PWM/VFM alternative circuit, chip enable circuit, and current limit circuit
Disadvantages- None were mentioned in the article
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Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
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- Datasheet: Download R1224N502E-F
- Chipdatas Part: CD92-R1224N502E-F
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/01 09:05 +0800
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