Product Summary

The ADP3181J is a highly efficient multiphase synchronous buck-switching regulator controller optimized for converting a 12 V main supply into the core supply voltage required by high performance Intel processors. It uses an internal 6-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage. The ADP3181J includes programmable no-load offset and slope functions to adjust the output voltage as a function of the load current so that it is always optimally positioned for a system transient. The applications of it include: desktop PC power supplies for next-generation Intel processors, VRM modules.

Parametrics

ADP3181J absolute maximim ratings: (1)VCC: -0.3 V to 15 V; (2)FBRTN: -0.3 V to +0.3 V; (3)VID0 to VID4, CPUID, EN, DELAY, ILIMIT, CSCOMP, RT, PWM1 to PWM4, COMP: -0.3 V to 5.5 V; (4)SW1 to SW4: -5 V to +25 V; (5)All Other Inputs and Outputs: -0.3 V to VCC +0.3 V; (6)Storage Temperature: -65℃ to +150℃; (7)Operating Ambient Temperature Range: 0℃ to +85℃; (8)Operating Junction Temperature: 125℃; (9)Thermal Impedance (θJA): 100℃/W; (10)Lead Temperature Soldering (10 sec): 300℃; (11)Infrared (15 sec): 260℃.

Features

ADP3181J features: (1)Selectable 2-, 3-, or 4-phase operation at up to 1 MHz per phase; (2)±14.5 mV worst-case mV differential sensing error over temperature; (3)Logic-level PWM outputs for interface to external high power drivers; (4)Active current balancing between all output phases; (5)Built-in power good/crowbar blanking supports on-the-fly VID code changes; (6)Digitally programmable output can be switched between VRM 9 (5-bit); (7)Programmable short circuit protection with programmable latch off delay.

Diagrams

ADP3181J block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
ADP3181JRQZ-RL
ADP3181JRQZ-RL

IC CTRLR BUCK 5/6BIT 28QSOP
Data Sheet
Negotiable 
ADP3181JRUZ-REEL
ADP3181JRUZ-REEL

IC REG BUCK 6BIT 2-4PHS 28-TSSOP
Data Sheet
Negotiable