ADP3210 Datasheet, PDF (10/38 Pages) ON Semiconductor – 7-Bit Programmable Multiphase Mobile CPU Synchronous

ADP3210
Pin No.
16
17
18
19
20
21 to 23
24 to 26
27
28
29
30
31
32
33
34 to 40
Mnemonic
LLINE
CSREF
CSSUM
CSCOMP
GND
SW3 to SW1
PWM3 to
PWM1
OD
DCM
Description
Output Load Line Programming Input. The center point of a resistor divider between CSREF and CSCOMP is
connected to this pin to set the load line slope.
Current-Sense Reference Voltage Input. The voltage on this pin is used as the reference for the current-sense
amplifier and the power-good and crowbar functions. This pin should be connected to the common point of the
output inductors.
Current-Sense Summing Node. External resistors from each switch node to this pin sum the inductor currents
together to measure the total output current.
Current-Sense Compensation Point. A resistor and capacitor from this pin to CSSUM determine the gain of the
current-sense amplifier and the positioning loop response time.
Ground. All internal biasing and the logic output signals of the device are referenced to this ground.
Current Balance Inputs. Inputs for measuring the current level in each phase. The SW pins of unused phases
should be left open.
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
ADP3210 to operate as a 1-, 2-, or 3-phase controller.
Multiphase Output Disable Logic Output. This pin is actively pulled low when the ADP3210 enters single-phase mode
or during shutdown. Connect this pin to the SD inputs of the Phase-2 and Phase-3 MOSFET drivers.
Discontinuous Current Mode Enable Output 1. This pin actively pulled low when the single-phase inductor
current crosses zero.
VRTT
TTSN
VCC
NC
PSI
VID6 to
VID0
Voltage Regulator Thermal Throttling Logic Output. This pin goes high if the temperature at the monitoring point
connected to TTSN exceeds the programmed VRTT temperature threshold.
Thermal Throttling Sense Input. 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. Connect TTSN to VCC if this function is not used.
Supply Voltage for the Device.
Not Connected.
Power State Indicator Input. Pulling this pin to GND forces the ADP3210 to operate in single-phase mode.
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 5).
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