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reference designLTC3372 | Demoboard DC2419A

Analog Devices LTC3372 | Demoboard DC2419A

4-Channel 8A Configurable Buck Plus Low IQ High Voltage Buck Supply

Overview

TopologyBuck Converter
Input voltage2.25-5.5 V
Switching frequency1000-3000 kHz
Output 11.8 V / 2 A

Description

Demonstration circuit 2419A features the LTC®3372 in a multi-output step-down converter. The controller portion of the LTC3372 drives a high output voltage (HV) buck converter which has an input voltage range of 6V to 60V.Its output voltage (VOUT_HV) is nominally 5V but can be configured for either 5V or 3.3V with the VOUTPRG pin. VOUT_HV supplies power to the configurable buck regulator. This regulator provides four low voltage (LV) outputs labelled VOUT1-4. These outputs are 1.2V/2A, 1.8V/2A, 2.5V/2A and 3.3V/2A respectively. When VOUT_HV is configured for 5V, it can supply 6A to the external loads with full load on VOUT1-4. With no load on VOUT1-4, VOUT_HV can supply 10A to the external loads. See Figure 3 for the Block Diagram.

Features

  • Selectable light load operating modes of:
    • FCM
    • Pulse-skipping (HV) and Burst Mode operation (LV)
    • Burst Mode operation
  • PLLIN pin to synchronize the LV regulators over a 1MHz to 3MHz range (166kHz to 500kHz for the HV converter)
  • Watch dog circuit
  • TEMP pin to monitor the junction temperature of the LTC3372
  • PGOOD pin for the HV converter and RST pin for the LV regulators

Typical applications

  • General Purpose Multi-Channel Power Supplies
  • Automotive and Industrial Always-On Systems

More information

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
SamplesAvailability & Sample
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74438357010
SPECWE-MAPI SMT Power Inductor, 1 µH, 10.25 A

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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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance1 µH
Performance Rated Current10.25 A
Saturation Current @ 30%12.5 A
DC Resistance11.6 mΩ
Self Resonant Frequency59 MHz
Operating Voltage80 V
MountSMT 
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