产品概述
描述
This evaluation board is based on the PM6675AS device, which consists of a single high efficiency step-down controller and an independent lowdropout (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.
Selectable low-consumption mode allows the highest efficiency over a wide range of load conditions. The low-noise mode sets the minimum switching 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 and ±2 A) can be chosen.
An active soft-end is independently performed on both the switching and the linear regulator outputs when disabled.
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所有功能
- Fixed 3 ms soft-start
- Latched OVP, UVP and thermal shutdown
- Selectable no-audible (33 kHz) pulse-skip mode
- Selectable pulse-skipping at light load
- Output voltage ripple compensation
- All ceramic output capacitors application supported
- Output soft-end
- No RSENSE current sensing using RDS(ON) of the low-side MOSFETs
- Very fast load transient response using constant on-time (COT) control loop
- 4.5 V to 36 V input voltage range
- 1.5 V fixed output voltage
- 0.6 V, ±1% voltage reference
- 1.237 V ±1% reference voltage available
- Negative current limit
- 0.6 V to 3.3 V adjustable output voltage
所有资源
| 资源标题 | 版本 | 更新时间 |
|---|
MCSDK Board Description (1)
| 资源标题 | 版本 | 更新时间 | |||
|---|---|---|---|---|---|
| ZIP | 1.0 | 01 Aug 2015 | 01 Aug 2015 |
Schematic Pack (1)
| 资源标题 | 版本 | 更新时间 | |||
|---|---|---|---|---|---|
| 1.0 | 01 Aug 2015 | 01 Aug 2015 |