ADP3197 查看數據表（PDF） - Analog Devices

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ADP3197

6-Bit Programmable 2-/3-Phase Synchronous Buck Controller

Analog Devices 

ADP3197

Pin No.

21 to 23

24

25 to 30

31

32

Mnemonic

PWM3 to

PMW1

VCC

VID5 to VID0

TTSENSE

VRHOT

Description

Logic Level PWM Outputs. Each output is connected to the input of an external MOSFET driver, such as the

ADP3120. Connecting the PWM3 output to VCC causes that phase to turn off, allowing the ADP3197 to operate

as a 2-phase or 3-phase controller.

A 340 Ω resistor should be placed between the 12 V system supply and the VCC pin. The internal shunt regulator

maintains VCC = 5 V.

Voltage Code DAC Inputs. These six pins are pulled down to GND, providing a Logic 0 if left open. When in normal

operation mode, the DAC output programs the FB regulation voltage from 0.3750 V and 1.55 V (see Table 4).

VR Hot Thermal Throttling Sense Input. An NTC thermistor between this pin and GND is used to remotely sense

the temperature at the desired thermal monitoring point.

Open-Drain Output. This output signals when the temperature at the monitoring point connected to TTSENSE

exceeds the maximum operating temperature. This can be connected to the PROCHOT# (a PC system signal)

output from the CPU.

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