STMicroelectronics PM6675S

Description

The PM6675S device consists of a single hig efficiency step-down controller and an independent Low Drop-Out (LDO) linear regulator.The Constant On-Time (COT) architecture assures fast transient response supporting both electrolytic and ceramic output capacitors. An embedded integrator control loop compensates the DC voltage error due to the output ripple.A selectable low-consumption mode allows the highest efficiency over a wide range of load conditions. The low-noise mode sets the minimumswitching frequency to 33 kHz for audio-sensitive applications.The LDO linear regulator can sink and source up to 2 Apk. Two fixed current limits (±1 A-±2 A) can be chosen.An active soft-end is independently performed on both the switching and the linear regulators outputs when disabled.

Features

• Switching section
• 4.5 V to 28 V input voltage range
• 0.6 V, ±1 % voltage reference
• Selectable 1.5 V fixed output voltage
• Adjustable 0.6 V to 3.3 V output voltage
• 1.237 V ±1 % reference voltage available
• Very fast load transient response using
• constant on-time control loop
• No RSENSE current sensing using low side
• MOSFETs' RDS(ON)
• Negative current limit
• Latched OVP and UVP
• Soft-start internally fixed at 3 ms
• Selectable pulse skipping at light load
• Selectable No-Audible (33 kHz) pulse skip mode
• Ceramic output capacitors supported
• Output voltage ripple compensation
• Output soft-end
• LDO regulator section
• Adjustable 0.6 V to 3.3 V output voltage
• Selectable ±1 Apk or ±2 Apk current limit
• Dedicated power-good signal
• Ceramic output capacitors supported
• Output soft-endREMARKS:-REFERPAGE NO 41Table 11.EVALUTED INDUCTORS

Typical applications

• Graphic cards
• Notebook computers
• Embedded computers

More information

• Datasheet
• IC product information