PM6685 STMicroelectronics, PM6685 Datasheet - Page 40
PM6685
Manufacturer Part Number
PM6685
Description
IC CTLR DUAL SYNC STDN 5X5VFQFPN
Manufacturer
STMicroelectronics
Specifications of PM6685
Applications
Controller, Notebook Power System
Voltage - Input
6 ~ 28 V
Number Of Outputs
2
Voltage - Output
-3.3V, 5V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-VFQFN, 32-VFQFPN
Output Voltage
5 V, 3.3 V
Output Current
0.1 A
Input Voltage
5.5 V to 28 V
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 10 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Other parts design
40/48
Figure 40. Bootstrap circuit
The bootstrap circuit capacitor value CBOOT must provide the total gate charge to the high
side MOSFET during turn on phase. A typical value is 100 nF.
The bootstrap diode D must charge the capacitor during the off time phases. The maximum
rated voltage must be higher than VINmax.
A resistor RBOOT on the BOOT pin could be added in order to reduce noise when the
phase node rises up, working like a gate resistor for the turn on phase of the high side
MOSFET.
Doc ID 11674 Rev 8
PM6685