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ADP3207 Datasheet(PDF) 9 Page - ON Semiconductor

Part No. ADP3207
Description  CPU Synchronous Buck Controller
Download  29 Pages
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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ADP3207 Datasheet(HTML) 9 Page - ON Semiconductor

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ADP3207
Rev. 1 | Page 9 of 29 | www.onsemi.com
Pin No.
Mnemonic
Description
21 to 23
SW3 to SW1
Current Balance Inputs. Inputs for measuring the current level in each phase. The SW pins of unused phases
should be left open.
24 to 26
PWM3 to
PWM1
Logic-Level PWM Outputs. Each output is connected to the input of an external MOSFET driver such as the
ADP3419. Connecting the PWM2 and/or PWM3 outputs to VCC causes that phase to turn off, allowing the
ADP3207 to operate as a 1-, 2-, or 3-phase controller.
27
OD
Multiphase Output Disable Logic Output. This pin is actively pulled low when the ADP3207 enters single-phase mode
or during shutdown. Connect this pin to the SD inputs of the Phase-2 and Phase-3 MOSFET drivers.
28
DCM
Discontinuous Current Mode Enable Output. This pin is actively pulled low when the single-phase inductor
current crosses zero.
29
VRTT
Voltage Regulator Thermal Throttling Logic Output. This pin goes high if the temperature at the monitoring point
connected to TTSENSE exceeds the programmed VRTT temperature threshold.
30
TTSENSE
Thermal Throttling Sense Input and OVP Disable. The center point of a resistor divider (where the lower resistor is
an NTC thermistor) between VCC and GND is connected to this pin to remotely sense the temperature at the
desired thermal monitoring point. Grounding TTSENSE disables OVP function.
31
VCC
Supply Voltage for the Device.
32
PSI
Power State Indicator Input. Pulling this pin to GND forces the ADP3207 to operate in single-phase mode.
33
DPRSTP
Deeper Stop Control Input.
34 to 40
VID6 to
VID0
Voltage Identification DAC Inputs. When in normal operation mode, the DAC output programs the FB regulation
voltage from 0.3 V to 1.5 V (see Table 6).


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