Features

• Wide Operating Input Voltage Range: 4V to 65V
• Synchronous Operation for Highest Efficiency
• Internal High Side and Low Side Power MOSFETs
• No Compensation Required
• Adjustable 50mA to 500mA Maximum Output Current
• Low Dropout Operation: 100% Duty Cycle
• Low Quiescent Current: 12μA
• Wide Output Range: 0.8V to V_IN
• 0.8V ±1% Feedback Voltage Reference
• Precise RUN Pin Threshold
• Internal and External Soft-Start
• Programmable 1.8V, 3.3V, 5V or Adjustable Output
• Few External Components Required
• Low Profile (0.75mm) 3mm × 5mm DFN and Thermally-Enhanced MSE16 Packages

Typical Application

Description

The LTC®3630 is a high efficiency step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load.

The LTC3630 can supply up to 500mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC3630’s combination of Burst Mode® operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.

With its wide input range of 4V to 65V, the LTC3630 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3630 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment. A feedback comparator output enables multiple LTC3630s to be paralleled in higher current applications.

The LTC3630 is available in the thermally-enhanced 3mm × 5mm DFN and the MSE16 packages.