MCP1253
MCP1253 is Low Noise / Positive-Regulated Charge Pump manufactured by Microchip Technology.
- Part of the MCP1252 comparator family.
- Part of the MCP1252 comparator family.
Features
:
- Inductorless, Buck/Boost, DC/DC Converter
- Low Power: 80 µA (Typical)
- High Output Voltage Accuracy:
- ±2.5% (VOUT Fixed)
- 120 m A Output Current
- Wide Operating Temperature Range:
- Industrial Temperature (I): -40°C to +85°C
- Extended Temperature (E): -40°C to +125°C
- Thermal Shutdown and Short-Circuit Protection
- Uses Small Ceramic Capacitors
- Switching Frequency:
- MCP1252: 650 k Hz
- MCP1253: 1 MHz
- Low-Power Shutdown Mode: 0.1 µA (Typical)
- Shutdown Input patible with 1.8V Logic
- VIN Range: 2.0V to 5.5V
- Selectable Output Voltage (3.3V or 5.0V) or Adjustable Output Voltage
- Space-Saving, 8-Lead MSOP
- Soft-Start Circuitry to Minimize In-Rush Current
- AEC-Q100 Qualified
Applications:
- White LED Backlighting
- Color Display Bias
- Local 3V-to-5V Conversions
- Flash Memory Supply Voltage
- SIM Interface Supply for GSM Phones
- Smart Card Readers
- PCMCIA Local 5V Supplies
Description
:
The MCP1252/3 are inductorless, positive-regulated charge pump DC/DC converters. The devices generate a regulated fixed (3.3V or 5.0V) or adjustable output voltage. They are specifically designed for applications requiring low noise and high efficiency and are able to deliver up to 120 m A output current. The devices allow the input voltage to be lower or higher than the output voltage, by automatically switching between buck/ boost operation.
The MCP1252 has a switching frequency of 650 k Hz, avoiding interference with sensitive IF bands. The MCP1253 has a switching frequency of 1 MHz and allows the use of smaller capacitors than the MCP1252, thus saving board space and cost.
Both devices feature a power-good output that can be used to detect out-of-regulation conditions. Extremely low supply current and low external parts count (three capacitors) make these devices ideal for small, batterypowered applications. A shutdown mode is also provided for further power reduction. The MCP1252 and MCP1253 feature thermal and short-circuit protection and are offered in...
