LTC1628

PRODUCTION

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator

Data Sheet Product Selection Table
Part Models
12
1ku List Price
Starting From $5.60
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Part Details

  • Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
  • OPTI-LOOP® Compensation Minimizes COUT
  • Dual N-Channel MOSFET Synchronous Drive
  • ±1% Output Voltage Accuracy
  • Power Good Output Voltage Monitor (LTC1628-PG)
  • DC Programmed Fixed Frequency 150kHz to 300kHz
  • Wide VIN Range: 3.5V to 36V Operation
  • Very Low Dropout Operation: 99% Duty Cycle
  • Adjustable Soft-Start Current Ramping
  • Foldback Output Current Limiting
  • Latched Short-Circuit Shutdown with Defeat Option
  • Output Overvoltage Protection
  • Remote Output Voltage Sense
  • Low Shutdown IQ: 20µA
  • 5V and 3.3V Standby Regulators
  • Small 28-Lead SSOP Package
  • Selectable Constant Frequency or Burst Mode® Operation
  • Available in 5mm × 5mm QFN and 28-Pin SSOP Packages
LTC1628
High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
Figure 1. High Efficiency Dual 5V/3.3V Step-Down Converter Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 5

Application Note 2

Design Note 9

Technical Articles 6

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC1628
  • LTC1628-PG
  • LTC1628-SYNC
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC543A

LTC2920-2CMS8 LTC1628CG | LTC2920 with Dual DC to DC Converter, 7V to 24V Input, 5V @ 12A max = VOUT1, 3.3V @ 12A max = VOUT2

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Product Details

DC543A Demo Board for:
LTC1628 High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
LTC2920 Single/Dual Power Supply Margining Controller

eval board
schematic 2
DC236C-A

LTC1628CG | High Efficiency, Multi-Phase 2-Output, Current Mode Controller, 5-30 VIN, 5V/4A and 3.3V/4A Output

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Product Details

DC236C-A: Demo Board for the LTC1628 High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator.

eval board
schematic 3
DC264A

LTC1628CG | Multi-Phase, 3 Output Regulator, 7-28VIN; 5V @ 3A, 3.3V @ 4A and a Linear 12V @ 150mA

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Product Details

DC264A: Demo Board for the LTC1628 High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator.

eval board
schematic 4
DC265A

LTC1628CG | Multi-Phase, 3 Output Regulator, 7-28VIN; 5V @ 3A, 3.3V @ 4A and a Synchronous 12V @ 200mA

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Product Details

DC265A: Demo Board for the LTC1628 High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator.

eval board
schematic 5
DC236C-C

LTC1628CG-PG | High Efficiency, Multi-Phase 2-Output, Current Mode Controller, 5-30 VIN, 5V/4A and 3.3V/4A Output

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Product Details

DC236C-C: Demo Board for the LTC1628 High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator.

eval board
schematic 6
DC271A

LTC1628CG | Dual Phase Multi-Output High Current Converter, 7V to 24V Input, VOUT1 = 5V @ 12A Max., VOUT2 = 3.3V @ 12A Max.

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Product Details

DC271A: Demo Board for the LTC1628 High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator.

eval board
schematic 7
DC392A-A

LTC1628CUH Demo Board | Dual Output, 5V to 24VIN, 5VOUT1 @ 4A, 3.3VOUT2 @ 5A

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Product Details

Demonstration circuit 392 is a dual output, step-down, synchronous buck converter featuring either the 150kHz to 300kHz LTC1628EUH controller (DC392A-A), the 250kHz to 550kHz LTC3728EUH (DC392A-B) or 250kHz to 550kHz LTC3728LUH (DC392A-C). It operates with an input voltage range of 7V to 24V and provides 3.3V @ 5A and 5V @ 4A at its output.
DC543A
LTC2920-2CMS8 LTC1628CG | LTC2920 with Dual DC to DC Converter, 7V to 24V Input, 5V @ 12A max = VOUT1, 3.3V @ 12A max = VOUT2
DC543A - Schematic
DC236C-A
LTC1628CG | High Efficiency, Multi-Phase 2-Output, Current Mode Controller, 5-30 VIN, 5V/4A and 3.3V/4A Output
DC236C-A - Schematic
DC264A
LTC1628CG | Multi-Phase, 3 Output Regulator, 7-28VIN; 5V @ 3A, 3.3V @ 4A and a Linear 12V @ 150mA
DC264A - Schematic
DC265A
LTC1628CG | Multi-Phase, 3 Output Regulator, 7-28VIN; 5V @ 3A, 3.3V @ 4A and a Synchronous 12V @ 200mA
DC265A - Schematic
DC236C-C
LTC1628CG-PG | High Efficiency, Multi-Phase 2-Output, Current Mode Controller, 5-30 VIN, 5V/4A and 3.3V/4A Output
DC236C-A - Schematic
DC271A
LTC1628CG | Dual Phase Multi-Output High Current Converter, 7V to 24V Input, VOUT1 = 5V @ 12A Max., VOUT2 = 3.3V @ 12A Max.
DC271A - Schematic
DC392A-A
LTC1628CUH Demo Board | Dual Output, 5V to 24VIN, 5VOUT1 @ 4A, 3.3VOUT2 @ 5A
DC392A-A - Schematic

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