ADP3164 Analog Devices, ADP3164 Datasheet - Page 4

• Manufacturer Part Number: ADP3164
• Description: 5-Bit Programmable 4-Phase Synchronous Buck Controller
• Manufacturer: Analog Devices

ADP3164
Pin Mnemonic
1–5 VID4 –
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CS+
VID0
SHARE
COMP
GND
FB
CT
PWRGD
CS–
PGND
PWM4
PWM3
PWM2
PWM1
REF
VCC
Function
Voltage Identification DAC Inputs. These pins are pulled up to an internal 3 V reference, providing a
Logic 1 if left open. The DAC output programs the FB regulation voltage from 1.1 V to 1.85 V. Leaving all five
DAC inputs open results in the ADP3164 going into a “No CPU” mode, shutting off its PWM outputs.
Current Sharing Output. This pin is connected to the SHARE pins of other ADP3164s in multiple VRM systems
to ensure proper current sharing between the converters. The voltage at this output programs the output current
control level between CS+ and CS–.
Error Amplifier Output and Compensation Point.
Ground. FB, REF, and the VID DAC of the ADP3164 are referenced to this ground. This is a low current ground
that can also be used as a return for the FB pin in remote voltage sensing applications.
Feedback Input. Error amplifier input for remote sensing of the output voltage.
External capacitor CT connection to ground sets the frequency of the device.
Open drain output that signals when the output voltage is outside of the proper operating range or when a phase
is not supplying current even if the output voltage is in specification.
Current Sense Positive Node. Positive input for the current comparator. The output current is sensed as a voltage
at this pin with respect to CS–.
Current Sense Negative Node. Negative input for the current comparator.
Power Ground. All internal biasing and logic output signals of the ADP3164 are referenced to this ground.
Logic-Level Output for the Phase 4 Driver.
Logic-Level Output for the Phase 3 Driver.
Logic-Level Output for the Phase 2 Driver.
Logic-Level Output for the Phase 1 Driver.
3.0 V Reference Output.
Supply Voltage for the ADP3164.
100nF
100
5-BIT CODE
PIN FUNCTION DESCRIPTIONS
10
1
2
3
4
5
6
7
8
9
VID4
VID3
VID2
VID1
VID0
SHARE
COMP
GND
FB
CT
AD820
ADP3164
PWRGD
PWM1
PWM2
PWM3
PWM4
PGND
VCC
REF
CS–
CS+
1.2V
19
18
17
16
15
14
13
12
11
20
20k
V
FB
+
1 F
100nF
12V