PM6685 STMicroelectronics, PM6685 Datasheet - Page 2

IC CTLR DUAL SYNC STDN 5X5VFQFPN

PM6685

Manufacturer Part Number
PM6685
Description
IC CTLR DUAL SYNC STDN 5X5VFQFPN
Manufacturer
STMicroelectronics
Datasheets

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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Contents
Contents
1
2
3
4
5
6
7
8
2/48
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
2.2
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1
3.2
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
Monitoring and protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.1
8.2
8.3
Internal linear regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Constant on time PWM control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Constant on time architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Output ripple compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Pulse skip mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
No-audible skip mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Soft start and soft end . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Gate drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Reference voltage and bandgap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Power up sequencing and operative modes . . . . . . . . . . . . . . . . . . . . . . . 28
Power good signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Doc ID 11674 Rev 8
PM6685

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