MCP1256/7/8/9
Regulated 3.3V, Low-Ripple Charge Pump with LowOperating Current SLEEP Mode or BYPASS Mode
Features
• In...
MCP1256/7/8/9
Regulated 3.3V, Low-Ripple Charge Pump with LowOperating Current SLEEP Mode or BYPASS Mode
Features
Inductorless 1.5x, 2x Boost DC/DC Converter Output
Voltage: 3.3V High Output
Voltage Accuracy:
- ±3.0% (VOUT Fixed) Output Current Up To 100 mA 20 mVPP Output
Voltage Ripple Thermal Shutdown and Short Circuit Protection Uses Small Ceramic
Capacitors Switching Frequency: 650 kHz Low-Power SLEEP Mode: MCP1256/7 BYPASS Mode: MCP1258/9 Low-Power Shutdown Mode: 0.1 µA (Typical) Shutdown Input Compatible with 1.8V Logic VIN Range: 1.8V to 3.6V Soft-Start Circuitry to Minimize Inrush Current Temperature Range: -40°C to +125°C Packaging:
- 10-Pin, 3 mm x 3 mm DFN - 10-Pin, MSOP
Applications
Pagers Portable Measurement Instruments Home Automation Products PIC® MCU Bias
Typical Application
INPUT 1.8V to 3.6V
CIN 10 µF
C1 1 µF
ON / OFF
MCP1256
7 VIN VOUT 5
10 SHDN PGOOD
1
4 C1+ 8 C1-
C2+ 6 C2- 3
2 SLEEP GND 9
OUTPUT 3.3V
R1
COUT 10 µF
C2 1 µF
Power-Good Indication
Typical Application with Power-Good Indication
Description
The MCP1256, MCP1257, MCP1258 and MCP1259 are inductorless, positive regulated charge pump DC/DC converters. The devices generate a regulated 3.3V output
voltage from a 1.8V to 3.6V input. The devices are specifically designed for applications operating from 2-cell alkaline, Ni-Cd, or Ni-MH batteries or by one primary lithium MnO2 (or similar) coin cell battery.
The MCP1256, MCP1257, MCP1258 and MCP...