ADP3210 Datasheet, PDF (9/38 Pages) ON Semiconductor – 7-Bit Programmable Multiphase Mobile CPU Synchronous

ADP3210
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Figure 5. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1
EN
Power Supply Enable Input. Pulling this pin to GND disables the PWM outputs and pulls the PWRGD output low.
2
PWRGD
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.
3
IMON
Current Monitor Output. This pin sources a current proportional to the output load current. A resistor to FBRTN
sets the current monitor gain.
4
CLKEN
Clock Enable Output. The pull-high voltage on this pin cannot be higher than VCC.
5
FBRTN
Feedback Return. VID DAC and error amplifier reference for remote sensing of the output voltage.
6
FB
Feedback Input. Error amplifier input for remote sensing of the output voltage.
7
COMP
Error Amplifier Output and Compensation Point.
8
NC
Not Connected.
9
TRDET#
Transient Detect Output. This pin is pulled low when a load release transient is detected. A capacitor to ground
is connected to TRDET# pin and a resistor from FB pin to TRDET# is connected. During repetitive load transients
at high frequencies, this circuit optimally positions the maximum and minimum output voltage into a specified
loadline window.
10
DPRSLP
Deeper Sleep Control Input.
11
ILIM
Current-Limit Setpoint. An external resistor from this pin to CSCOMP sets the current-limit threshold of the
converter.
12
IREF
This pin sets the internal bias currents. A 80kOhm resistor is connected from this pin to ground.
13
RPM
RPM Mode Timing Control Input. A resistor between this pin to ground sets the RPM mode turn-on threshold voltage.
14
RT
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.
15
RAMP
PWM Ramp Current Input. An external resistor from the converter input voltage to this pin sets the internal PWM
ramp.
Rev. 0.3 | Page 9 of 38