LTC1628
Info: : PRODUCTION
searchIcon
cartIcon

LTC1628

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

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 12
1ku List Price Starting From $5.60
Features
  • 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
Additional Details
show more Icon

The LTC1628/LTC1628-PG are high performance dual step-down switching regulator controllers that drive all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows adjustment of the frequency up to 300kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.

OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The precision 0.8V reference and power good output indicator are compatible with future microprocessor generations, and a wide 3.5V to 30V (36V maximum) input supply range encompasses all battery chemistries.

A RUN/SS pin for each controller provides both soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when overcurrent latchoff is disabled. Output overvoltage protection circuitry latches on the bottom MOSFET until VOUT returns to normal. The FCB mode pin can select among Burst Mode, constant frequency mode and continuous inductor current mode or regulate a secondary winding. The LTC1628-PG includes a power good output pin that replaces the FLTCPL, fault coupling control pin of the LTC1628.

Applications

  • Notebook and Palmtop Computers, PDAs
  • Battery Chargers
  • Portable Instruments
  • Battery-Operated Digital Devices
  • DC Power Distribution Systems
Part Models 12
1ku List Price Starting From $5.60

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC1628CG#PBF
  • HTML
  • HTML
LTC1628CG#TRPBF
  • HTML
  • HTML
LTC1628CG-PG#PBF
  • HTML
  • HTML
LTC1628CG-PG#TRPBF
  • HTML
  • HTML
LTC1628CUH#PBF
  • HTML
  • HTML
LTC1628CUH#TRPBF
  • HTML
  • HTML
LTC1628IG#PBF
  • HTML
  • HTML
LTC1628IG#TRPBF
  • HTML
  • HTML
LTC1628IG-PG#PBF
  • HTML
  • HTML
LTC1628IG-PG#TRPBF
  • HTML
  • HTML
LTC1628IUH#PBF
  • HTML
  • HTML
LTC1628IUH#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC1628CG#PBF

PRODUCTION

LTC1628CG#TRPBF

PRODUCTION

LTC1628CG-PG#PBF

PRODUCTION

LTC1628CG-PG#TRPBF

PRODUCTION

LTC1628IG#PBF

PRODUCTION

LTC1628IG#TRPBF

PRODUCTION

LTC1628IG-PG#PBF

PRODUCTION

LTC1628IG-PG#TRPBF

PRODUCTION

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC1628CUH#PBF

PRODUCTION

LTC1628CUH#TRPBF

PRODUCTION

LTC1628IUH#PBF

PRODUCTION

LTC1628IUH#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

arrow down

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC1628CG#PBF

PRODUCTION

LTC1628CG#TRPBF

PRODUCTION

LTC1628CG-PG#PBF

PRODUCTION

LTC1628CG-PG#TRPBF

PRODUCTION

LTC1628IG#PBF

PRODUCTION

LTC1628IG#TRPBF

PRODUCTION

LTC1628IG-PG#PBF

PRODUCTION

LTC1628IG-PG#TRPBF

PRODUCTION

Jan 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC1628CUH#PBF

PRODUCTION

LTC1628CUH#TRPBF

PRODUCTION

LTC1628IUH#PBF

PRODUCTION

LTC1628IUH#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 7

reference details image

DC265A

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

reference details image

DC236C-C

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

zoom

DC236C-C

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

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

Product Detail

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

reference details image

DC271A

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

zoom

DC271A

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

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

Product Detail

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

reference details image

DC392A-A

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

zoom

DC392A-A

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

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

Product Detail

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.

reference details image

DC543A

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

zoom

DC543A

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

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

Product Detail

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

reference details image

DC236C-A

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

zoom

DC236C-A

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

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

Product Detail

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

reference details image

DC264A

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

Tools & Simulations

Tools & Simulations 1

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.

Recently Viewed