ADP3208CJCPZ-RL データシートの表示（PDF） - ON Semiconductor

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ADP3208CJCPZ-RL

7-Bit, Programmable, Dual-Phase, Mobile, CPU, Synchronous Buck Controller

ON Semiconductor 

Preliminary

7-Bit,Programmable,Dual-

Phase,Mobile,CPU,Synchronous

Buck Controller

ADP3208C

FEATURES

Single-chip solution

Fully compatible with the Intel® IMVP-6+™ specifications

Integrated MOSFET drivers

Input Voltage Range of 3.3 V to 22 V

Selectable 1- or 2-phase operation with up to 1 MHz per

phase switching frequency

Guaranteed ±8 mV worst-case differentially sensed core

voltage error over temperature

Automatic power-saving mode maximizes efficiency with

light load during deeper sleep operation

Soft transient control reduces inrush current and audio noise

Active current balancing between output phases

Independent current limit and load line setting inputs for

additional design flexibility

Built-in power-good blanking supports

voltage identification (VID) on-the-fly transients

7-bit, digitally programmable DAC with 0.3 V to 1.5 V output

Short-circuit protection with latch-off delay

Clock enable output delays the CPU clock until the core

voltage is stable

Output load current monitor

48-lead LFCSP

APPLICATIONS

Notebook power supplies for next-generation Intel processors

GENERAL DESCRIPTION

The ADP3208C is a highly efficient, multiphase, synchronous

buck switching regulator controller. With its integrated drivers,

the ADP3208C is optimized for converting the notebook

battery voltage into the core supply voltage required by high

performance Intel processors. An internal 7-bit DAC is used to

read a VID code directly from the processor and to set the CPU

core voltage to a value within the range of 0.3 V to 1.5 V. The

phase relationship of the output signals ensures interleaved 2-

phase operation.

The ADP3208C uses a multimode architecture run at a

programmable switching frequency and optimized for efficiency

depending on the output current requirement. The ADP3208C

switches between single- and dual-phase operation to maximize

efficiency with all load conditions. The chip includes a

programmable load line slope function to adjust the output voltage

as a function of the load current so that the core voltage is always

optimally positioned for a load transient. The ADP3208C also

provides accurate and reliable short-circuit protection,

adjustable current limiting, and a delayed power-good output.

The IC supports on-the-fly output voltage changes requested by

the CPU.

The ADP3208C is specified over the extended commercial

temperature range of -10°C to 100°C and is available in a 48-lead

LFCSP.

May 2008– Rev. 1

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