DESCRIPTION
The LT®7200S is a quad-channel, high efficiency
monolithic synchronous buck regulator, capable of
sinking/sourcing 5A to the load per channel. Its multichannel
flexibility is ideal for powering complex
systems with the compact layout. The operating
supply voltage range is from 2.9V to 18V, making it
suitable for various supply applications from a 3.3V,
5V to 12V supply.
The operating frequency is programmable from
400kHz to 3MHz with an external resistor, or externally
synchronized for switching noise sensitive
applications. The unique “phase lockable, controlled
on-time, constant frequency, current mode”
architecture, is ideal for high frequency, high stepdown
applications while demanding fast transient
responses. The high frequency capability allows
smaller surface mount inductors and capacitors. The
MODE/SYNC pin selects low noise Forced Continuous
Mode (FCM) or high efficiency Discontinuous Mode
(DCM). The PHMODE pin allows to run out-of-phase
among 4 channels, which lessens the required input
and output capacitors. The LT7200S uses second
generation Silent Switcher technology with
integrated bypass capacitors to deliver a highly
efficient solution at high frequencies with excellent
EMI performance.

FEATURES
 Silent Switcher 2 Architecture:
 Ultralow EMI
 Eliminated PCB Layout Sensitivity
 Internal Bypass Caps Reduce Radiated EMI
 Wide SVIN Range: 2.9V to 18V; PVIN: 1.5V to 18V
 Wide VOUT Range: 0.5V to 0.9VIN
 Output Current: ±5A/ Channel; up to ±20A
 Accurate Reference: 0.5V ± 0.8% Over Temp
 High Efficiency: Up to 96%
 12ns Min on-time: True 12V to 1V at 2MHz
 Programmable Multi-phase, Synchronizable
Frequency: 400kHz to 3MHz
 Current Mode: Excellent Line and Load
Transient Response
 User Selectable Discontinuous Mode® (DCM) or
Forced Continuous Mode (FCM) Operation
 Flexible Individual Internal Compensation for
Ease of Use; External for Fast Transient
 Accurate Individual 1.2V EN/ Run Pin Threshold
 Individual Output Tracking and Soft-Start
 Individual Power Good Status Output
 Low Profile 5mm x 6mm 48-Lead LQFN Package

APPLICATIONS
 Distributed Power Systems, Server Power
 Point of Load Supply for ASIC, FPGA, Etc.