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MCP1603
  • MCP1603
  • MCP1603

MCP1603

In Production

The MCP1603 is a high efficiency fully integrated 500 mA 2.0 MHz synchronous buck regulator ideally suited for Li-Ion/NiMH Battery powered application powered. At heavy loads, the MCP1603 operates in the 2.0 MHz fixed frequency PWM mode which provides a low noise, low output ripple, small-size solution. When the load is reduced to light levels, the MCP1603 automatically changes operation to a PFM mode to minimize quiescent current draw from the battery. No intervention is necessary for a smooth transition from one mode to another. These two modes of operation allow the MCP1603 to achieve the highest efficiency over the entire operating current range....

Microchip Technology MCP1603 Product Info

16 April 2026 0

Parameters

VIN Min V (volt)

2.7

VIN Max V (volt)

5.5

IOUT Max mA (milliampere)

500

Switching Frequency Max kHz (kilohertz)

2000

VOUT Min V (volt)

0.8

VOUT Max V (volt)

4.5

Features

  • Small packages: TSOT-23 and 2x3 DFN
  • PWM/PFM automatic transistion
  • Over current and temperature protection
  • Automatic PWM/PFM mode transition
  • Eff. 90%, Shutdown Current 100 nA
  • Small passives 4.5 microhenry, 4.5 microfarad

Description

The MCP1603 is a high efficiency fully integrated 500 mA 2.0 MHz synchronous buck regulator ideally suited for Li-Ion/NiMH Battery powered application powered. At heavy loads, the MCP1603 operates in the 2.0 MHz fixed frequency PWM mode which provides a low noise, low output ripple, small-size solution. When the load is reduced to light levels, the MCP1603 automatically changes operation to a PFM mode to minimize quiescent current draw from the battery. No intervention is necessary for a smooth transition from one mode to another. These two modes of operation allow the MCP1603 to achieve the highest efficiency over the entire operating current range.

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