PM6685 Dual step-down controller with auxiliary voltages for notebook system power

PM6685 is a dual step-down controller specifically designed to provide extremely high efficiency conversion with loss-less 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. The pulse skipping technique increases efficiency for very light loads. Moreover, a minimum switching frequency of 33kHz is selectable in order to avoid audio noise issues.

The PM6685 provides a selectable switching frequency, allowing either 200 kHz/300 kHz, 300 kHz/400 kHz, or 400 kHz/500 kHz operation of the 5 V/3.3 V switching sections

技术特性

6 V to 28 V input voltage range
Fixed 5 V - 3.3 V output voltages
5 V and 3.3 V voltage always available to deliver 100 mA of peak current
1.230 V ±1% reference voltage available
Lossless current sensing using low side
MOSFETs' RDS(on)
Negative current limit
Soft-start internally fixed at 2 ms
Soft output discharge
Latched OVP and UVP
Selectable pulse skipping at light loads
Selectable minimum frequency (33 kHz) in pulse skip mode
4 mW maximum quiescent power
Independent power good signals
Output voltage ripple compensation

功能框图

PM6685 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
PM6685TR	Active		1000	VFQFPN 32 5x5x1.0	Tape And Reel
PM6685	Active		1000	VFQFPN 32 5x5x1.0	Tube

DATASHEET

描述	版本	大小
PM6685 : DS4429: Dual step-down main supply controller with auxilary voltages for notebook system power	8	4892KB