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reference designLT7852 | Demoboard LTC7852/LTC7852-1

Analog Devices LT7852 | Demoboard LTC7852/LTC7852-1

Dual Output, 6-Phase, Multiphase Current Mode Synchronous Controller with Current Monitoring

Overview

TopologyBuck Converter
Input voltage4.5-5.5 V
Switching frequency215-1225 kHz
Output 12 V / 330 A
IC revision00

Description

The LT C®7852/LTC7852-1 is a six-phase, dual output current mode synchronous step-down switching regu-lator controller that works in conjunction with external power train devices such as DrMOS, power blocks or discrete N-channel MOSFETs and associated gate drivers. Its flexible design enables 1-, 2-, 3-, 4-, 5-, and 6-phase configurations. The LTC7852 offers a unique feature that enhances the signal-to-noise ratio of the current sense signal, allowing the use of inductors with very low DC winding resistances for maximum efficiency. The controller achieves a minimum on-time of just 40ns, permitting the use of high switching frequency at high step-down ratios. 8-, 10- or 12 phases with two ICs can be paralleled for very high current requirements up to 400A.

Features

  • Sub-Milliohm DCR Sensing or DrMOS with CurrentSense Improves Efficiency
  • Operates with Power Blocks, DrMOS or External Gate Drivers and MOSFETs
  • ±0.5% Total Output Voltage Accuracy
  • Flexible Phase Configuration
  • Dual Output Current Monitoring
  • tON(MIN) = 40ns, Capable of Very Low Duty Cycles atHigh Frequency
  • Dual Differential Remote Sensing Amplifiers
  • Programmable Frequency Range of 250kHz to 1.2MHz
  • VIN Range Is Not Limited by IC
  • VCC Range: 4.5V to 5.5V
  • VOUT Range: 0.5V to 2.0V
  • 48 Lead (5mm × 6mm) GQFN for LTC7852
  • 36 Lead (4mm × 5mm) QFN for LTC7852-1

Typical applications

  • DC Power Distribution Systems
  • Computer Systems
  • Telecom and Datacom Systems

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
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Status
Product series
L(nH)
LR(nH)
IR(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
SamplesAvailability & Sample
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744309025
SPECWE-HCM SMT High Current Flat Wire Inductor, 250 nH, 245 nH

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Inductance250 nH
Rated Inductance245 nH
Rated Current47.5 A
Saturation Current @ 10%75.6 A
Saturation Current @ 30%88.5 A
DC Resistance0.165 mΩ
Self Resonant Frequency37 MHz
MaterialMnZn 
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