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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 11.2 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

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(mm)
f
(mm)
λDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
L
(µH)
IRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
fres
(MHz)
V
(V)
MountPinsRowsH
(mm)
GenderTypeIR
(A)
Packaging Samples
150060RS75000SPEC
25 files WL-SMCW SMT Mono-color Chip LED Waterclear 1.6 625 Red 630 250 2 AlInGaP 140 SMT 0.7 Tape and Reel
74438357010SPEC
9 files WE-MAPI SMT Power Inductor 4 1 10.25 12.5 11.6 59 80 SMT 2 3.1 7.4
62000311121SPEC
6 files WR-PHD 2.00 mm THT Pin Header 6 THT 3 Single Pin Header Straight 2 Bag
62000411121SPEC
6 files WR-PHD 2.00 mm THT Pin Header 8 THT 4 Single Pin Header Straight 2 Bag
702933000SPEC
3 files WA-SNSR Self-Retaining Spacer 9.5 4.8
60800213421SPEC
3 files WR-PHD 2.00 mm Jumper with Test Point 2 Jumper 3 Bag
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(mm)
f
(mm)
λDom typ.
(nm)
Emitting ColorλPeak typ.
(nm)
IV typ.
(mcd)
VF typ.
(V)
Chip Technology50% typ.
(°)
L
(µH)
IRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
fres
(MHz)
V
(V)
MountPinsRowsH
(mm)
GenderTypeIR
(A)
Packaging Samples