STMicroelectronics PM6681A
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. The PM6681A provides a selectable switching frequency, allowing three different values of switching frequencies for the two switching sections.| Part No. | PM6681A |
|---|---|
| Datasheet | PM6681A Download |
| Manufacturer |  STMicroelectronics |
| Description | Dual synchronous step-down controller |
| Buy | Stock & Price |
FEATURES
● 6 V to 36 V input voltage range● Adjustable output voltages
● 0.9 - 3.3 V LDO adjustable delivers 100 mA peak current
● 5 V LDO delivers 100 mA peak current
● 1.237 V ±1 % reference voltage available
● No RSENSE current sensing using low side MOSFETs' RDS(on)
● Negative current limit
● Soft-start internally fixed at 2 ms
● Soft output discharge
● Latched UVP
● Not-latched OVP
● Selectable pulse skipping at light loads
● Selectable minimum frequency (33 kHz) in pulse skip mode
● 5 mW maximum quiescent power
● Independent Power Good signals
● Output voltage ripple compensation
APPLICATIONS
● Embedded computer system● FPGA system power
● Industrial applications on 24 V
● High performance and high density DC-DC modules
● Notebook computer VFQFPN-32 (5 mm x 5 mm)
DESCRIPTION
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 33 kHz is selectable to avoid audio noise issues.
