PM6681A Dual synchronous step down controller with adjustable LDO
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
技术特性
- 6V to 36V input voltage range
- Adjustable output voltages
- 0.9-3.3V LDO adjustable delivers 100mA peak current
- 5V LDO delivers 100mA peak current
- 1.237V ±1% reference voltage available
- NO RSENSE current sensing using low side MOSFETs' RDS(on)
- Negative current limit
- Soft start internally fixed at 2ms
- Soft output discharge
- Latched UVP
- Not-latched OVP
- Selectable pulse skipping atlight loads
- Selectable minimum frequency(33kHz) in pulse skip mode
- 5mW maximum quiescent power
- Independent Power Good signals
- Output voltage ripple compensation
|
功能框图
 |
PM6681A 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 |
| PM6681ATR |
Active |
|
1000 |
VFQFPN 32 5x5x1.0 |
Tape And Reel |
|
|
| PM6681A |
Active |
|
1000 |
VFQFPN 32 5x5x1.0 |
Tube |
|
|
DATASHEET
| 描述 |
版本 |
大小 |
| PM6681A : DS4968: Dual synchronous step-down controller with adjustable LDO |
3 |
2752KB |
APPLICATION NOTES
| 描述 |
版本 |
大小 |
| AN2833: Dual step-down controller with auxiliary voltages for industrial system power |
2 |
2278KB |
| AN2829: Dual step-down controller with auxilary voltages for notebook system power |
1 |
2093KB |
FLYERS
BOARDS AND TOOLS
| 型号 |
描述 |
| STEVAL-ISA067V1 |
Dual step-down controller with auxiliary voltages demonstration board based on the PM6681A for industrial system power |
