Microchip MCP1623T-I/CHY

Преобразователь, микроконтроллеры PIC®0,8 В ~ 5,5 В2 В ~ 5,5 В

Overview

The Microchip MCP1623T-I/CHY and MCP1624 are Adjustable, Fixed Frequency, Synchronous Step-Up DC-DC Converters. Primarily they are designed to offer a compact and highly efficient power supply solution for PIC Microcontrollers in one-, two- and three-cell battery powered applications. The desired output voltage of the device is set by the application of a small external resistor divider.The design allows the regulator to start up without high inrush current or output voltage overshoot from a low 0.65 V input. Combined is a low-resistance N-Channel Boost Switch and Synchronous P-Channel Switch to offer high efficiency. All compensation and protection circuitry is integrated into the device to minimise the required external components.Also featured is a Load Disconnect mode that provides input to output isolation while disabled. This mode consumes less than 1 μA of input current.

Up to 96% Typical Efficiency425 mA Typical Peak Input Current LimitLow Start Up Voltage: 0.65 V (typical) @ 3.3 V VOUT, 1 mALow Operating Input Voltage: 0.35 V (typical) @ 3.3 V VOUT, 1 mAAdjustable Output Voltage Range: 2.0 V to 5.5 VAutomatic PFM/PWM Operation – MCP1624 model onlyPWM-only Operation – MCP1623T-I/CHY model only500 kHz PWM FrequencyLow Device Quiescent Current: 19 μA (typical, PFM mode)Internal Synchronous RectifierInternal CompensationInrush Current Limiting and Internal Soft-StartTrue Load DisconnectShutdown Current: < 1 μALow Noise, Anti-Ringing ControlOver-temperature Protection

Features

Applications

• GSM Base Station
• LCD-TV/PDP-TV
• Copier/Printer
• Set-Top Box
• DDR Vooo and Vπ Voltage Generation
• PC Dual Power Supply
• Server DDR Power
• Desktop Computer
• Graphics Cards
• Cell Phones