产品概述
描述
PM6681A is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with lossless current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation. An embedded integrator control loop compensates the DC voltage error due to the output ripple. Pulse skipping technique increases efficiency at very light load. Moreover a minimum switching frequency of 33kHz is selectable to avoid audio noise issues. The PM6681A provides a selectable switching frequency, allowing three different values of switching frequencies for the two switching sections. The output voltages OUT1 and OUT2 can be adjusted from 0.9V to 5V and from 0.9V to 3.3V respectively. The device provides also 2 LDOs, 5V fixed and 0.9V-3.3V adjustable.
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所有功能
- Latched UVP
- Soft output discharge
- Selectable pulse skipping atlight loads
- Not-latched OVP
- 5mW maximum quiescent power
- Selectable minimum frequency(33kHz) in pulse skip mode
- Output voltage ripple compensation
- Independent Power Good signals
- Negative current limit
- NO RSENSE current sensing using low side MOSFETs' RDS(on)
- 6V to 36V input voltage range
- 0.9-3.3V LDO adjustable delivers 100mA peak current
- Adjustable output voltages
- 1.237V ±1% reference voltage available
- Soft start internally fixed at 2ms
- 5V LDO delivers 100mA peak current
EDA符号、封装和3D模型
意法半导体 - PM6681A
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