ADP3207 ANALOG DEVICES, ADP3207 Datasheet - Page 8

• Manufacturer Part Number: ADP3207
• Description: 7-Bit Programmable Multiphase Mobile CPU Synchronous Buck Controller
• Manufacturer: ANALOG DEVICES

ADP3207
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 to 23
Mnemonic
EN
PWRGD
PGDELAY
CLKEN
FBRTN
FB
COMP
SS
STSET
DPRSLP
ILIMIT
VRPM
RRPM
RT
RAMPADJ
LLSET
CSREF
CSSUM
CSCOMP
GND
SW3 to SW1
Description
Power Supply Enable Input. Pulling this pin to GND disables the PWM outputs and pulls the PWRGD output low.
Power-Good Output. Open drain output that signals when the output voltage is outside of the proper operating
range. The pull-high voltage on this pin cannot be higher than VCC.
Power-Good Delay Setting Input. A capacitor between this pin and GND sets the power-good delay time.
Clock Enable Output. The pull-high voltage on this pin cannot be higher than VCC.
Feedback Return. VID DAC and error amplifier reference for remote sensing of the output voltage.
Feedback Input. Error amplifier input for remote sensing of the output voltage.
Error Amplifier Output and Compensation Point.
Soft-Start Delay Setting Input. An external capacitor connected between this pin and GND sets the soft-start
ramp-up time and the current-limit latch-off delay time.
Soft Transient Slew Rate Timing Input. A capacitor from this pin to GND sets the slew rate of the output voltage
when transitioning between the boot voltage and the programmed VID voltage, and when transitioning
between active mode and deeper sleep mode.
Deeper Sleep Control Input.
Current-Limit Setpoint. An external resistor from this pin to GND sets the current-limit threshold of the converter.
RPM Mode Reference Voltage Output.
RPM Mode Timing Control Input. A resistor between this pin and VRPM sets the RPM mode turn-on threshold voltage.
Multiphase Frequency Setting Input. An external resistor connected between this pin and GND sets the oscillator
frequency of the device when operating in multiphase PWM mode.
PWM Ramp Current Input. An external resistor from the converter input voltage to this pin sets the internal PWM
ramp.
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.
PGDELAY
DPRSLP
PWRGD
CLKEN
FBRTN
STSET
COMP
EN
FB
SS
10
1
2
3
4
5
6
7
8
9
PIN 1
INDICATOR
40
11
Figure 5. Pin Configuration
39
12
Rev. 0 | Page 8 of 32
38
13
(Not to Scale)
37
14
ADP3207
TOP VIEW
15
36
35
16
34
17
33
18
32
19
31
20
30
29
28
27
26
25
24
23
22
21
TTSENSE
VRTT
DCM
PWM1
PWM2
PWM3
SW1
SW2
SW3
OD
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