LTC6908 - Dual Output Oscillator with Spread Spectrum Modulation
LTC6909 - 1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation

LT1374 - 4.5A, 500kHz Step-Down Switching Regulator

Features

  • Click Here For LT1374 Evaluation Kits
  • Constant 500kHz Switching Frequency
  • High Power 16-Pin TSSOP Package Available
  • Uses All Surface Mount Components
  • Inductor Size Reduced to 1.8µH
  • Saturating Switch Design: 0.07Ω
  • Effective Supply Current: 2.5mA
  • Shutdown Current: 20µA
  • Cycle-by-Cycle Current Limiting
  • Easily Synchronizable

Typical Application

LT1374
LT1374
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Description

The LT1374 is a 500kHz monolithic buck mode switching regulator. A 4.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. High switching frequency allows a considerable reduction in the size of external components. The topology is current mode for fast transient response and good loop stability. Both fixed output voltage and adjustable parts are available.

A special high speed bipolar process and new design techniques achieve high efficiency at high switching frequency. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch.

The LT1374 is available in standard 7-pin DD, TO-220, fused lead SO-8 and 16-pin exposed pad TSSOP packages. Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts may be used, including the inductor and capacitors. There is the optional function of shutdown or synchronization. A shutdown signal reduces supply current to 20µA. Synchronization allows an external logic level signal to increase the internal oscillator from 580kHz to 1MHz.

Protected by U.S. Patents, Including 6111439, 5668493, 5656965

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Packaging

SO-8, DD-7, T5, TSSOP-16

LT1374
LT1374
LT1374
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1374CFE TSSOP 16 C $5.38 $4.55 View
LT1374CFE#PBF TSSOP 16 C $5.38 $4.55 View
LT1374CFE#TR TSSOP 16 C   $4.67 View
LT1374CFE#TRPBF TSSOP 16 C   $4.67 View
LT1374CR DD PAK 7 C $5.50 $4.70 View
LT1374CR#PBF DD PAK 7 C $5.50 $4.70 View
LT1374CR#TR DD PAK 7 C   $4.82 View
LT1374CR#TRPBF DD PAK 7 C   $4.82 View
LT1374CR-5 DD PAK 7 C $5.50 $4.70 View
LT1374CR-5#PBF DD PAK 7 C $5.50 $4.70 View
LT1374CR-5#TR DD PAK 7 C   $4.82 View
LT1374CR-5#TRPBF DD PAK 7 C   $4.82 View
LT1374CR-5SYNC DD PAK 7 C $5.50 $4.70 View
LT1374CR-5SYNC#PBF DD PAK 7 C $5.50 $4.70 View
LT1374CR-5Sync#TR DD PAK 7 C   $4.82 View
LT1374CR-5Sync#TRPBF DD PAK 7 C   $4.82 View
LT1374CR-SYNC DD PAK 7 C $5.50 $4.70 View
LT1374CR-SYNC#PBF DD PAK 7 C $5.50 $4.70 View
LT1374CR-Sync#TR DD PAK 7 C   $4.82 View
LT1374CR-Sync#TRPBF DD PAK 7 C   $4.82 View
LT1374CS8 SO 8 C $5.00 $4.40 View
LT1374CS8#PBF SO 8 C $5.00 $4.40 View
LT1374CS8#TR SO 8 C   $4.46 View
LT1374CS8#TRPBF SO 8 C   $4.46 View
LT1374CS8-5 SO 8 C $5.00 $4.40 View
LT1374CS8-5#PBF SO 8 C $5.00 $4.40 View
LT1374CS8-5#TR SO 8 C   $4.46 View
LT1374CS8-5#TRPBF SO 8 C   $4.46 View
LT1374CS8-5SYNC SO 8 C $5.00 $4.40 View
LT1374CS8-5SYNC#PBF SO 8 C $5.00 $4.40 View
LT1374CS8-5Sync#TR SO 8 C   $4.46 View
LT1374CS8-5Sync#TRPBF SO 8 C   $4.46 View
LT1374CS8-SYNC SO 8 C $5.00 $4.40 View
LT1374CS8-SYNC#PBF SO 8 C $5.00 $4.40 View
LT1374CS8-Sync#TR SO 8 C   $4.46 View
LT1374CS8-Sync#TRPBF SO 8 C   $4.46 View
LT1374CT7 TO-220 7 C $5.35 $4.60 View
LT1374CT7#PBF TO-220 7 C $5.35 $4.60 View
LT1374CT7-5 TO-220 7 C $5.35 $4.60 View
LT1374CT7-5#PBF TO-220 7 C $5.35 $4.60 View
LT1374HVCFE TSSOP 16 C $5.92 $5.00 View
LT1374HVCFE#PBF TSSOP 16 C $5.92 $5.00 View
LT1374HVCFE#TR TSSOP 16 C   $5.12 View
LT1374HVCFE#TRPBF TSSOP 16 C   $5.12 View
LT1374HVCR DD PAK 7 C $6.15 $5.10 View
LT1374HVCR#PBF DD PAK 7 C $6.15 $5.10 View
LT1374HVCR#TR DD PAK 7 C   $5.22 View
LT1374HVCR#TRPBF DD PAK 7 C   $5.22 View
LT1374HVCS8 SO 7 C $5.75 $4.85 View
LT1374HVCS8#PBF SO 7 C $5.75 $4.85 View
LT1374HVCS8#TR SO 8 C   $4.91 View
LT1374HVCS8#TRPBF SO 8 C   $4.91 View
LT1374HVIFE TSSOP 16 I $6.74 $5.70 View
LT1374HVIFE#PBF TSSOP 16 I $6.74 $5.70 View
LT1374HVIFE#TR TSSOP 16 I   $5.82 View
LT1374HVIFE#TRPBF TSSOP 16 I   $5.82 View
LT1374HVIR DD PAK 7 I $7.00 $5.90 View
LT1374HVIR#PBF DD PAK 7 I $7.00 $5.90 View
LT1374HVIR#TR DD PAK 7 I   $6.02 View
LT1374HVIR#TRPBF DD PAK 7 I   $6.02 View
LT1374HVIS8 SO 8 I $6.60 $5.55 View
LT1374HVIS8#PBF SO 8 I $6.60 $5.55 View
LT1374HVIS8#TR SO 8 I   $5.61 View
LT1374HVIS8#TRPBF SO 8 I   $5.61 View
LT1374IFE TSSOP 16 I $6.15 $5.20 View
LT1374IFE#PBF TSSOP 16 I $6.15 $5.20 View
LT1374IFE#TR TSSOP 16 I   $5.32 View
LT1374IFE#TRPBF TSSOP 16 I   $5.32 View
LT1374IR DD PAK 7 I $6.30 $5.40 View
LT1374IR#PBF DD PAK 7 I $6.30 $5.40 View
LT1374IR#TRPBF DD PAK 7 I   $5.52 View
LT1374IR-5 DD PAK 7 I $6.30 $5.40 View
LT1374IR-5#PBF DD PAK 7 I $6.30 $5.40 View
LT1374IR-5#TRPBF DD PAK 7 I   $5.52 View
LT1374IR-5SYNC DD PAK 7 I $6.30 $5.40 View
LT1374IR-5SYNC#PBF DD PAK 7 I $6.30 $5.40 View
LT1374IR-SYNC DD PAK 7 I $6.30 $5.40 View
LT1374IR-SYNC#PBF DD PAK 7 I $6.30 $5.40 View
LT1374IS8 SO 8 I $5.75 $5.05 View
LT1374IS8#PBF SO 8 I $5.75 $5.05 View
LT1374IS8#TR SO 8 I   $5.11 View
LT1374IS8#TRPBF SO 8 I   $5.11 View
LT1374IS8-5 SO 8 I $5.75 $5.05 View
LT1374IS8-5#PBF SO 8 I $5.75 $5.05 View
LT1374IS8-5#TR SO 8 I   $5.11 View
LT1374IS8-5#TRPBF SO 8 I   $5.11 View
LT1374IS8-5SYNC SO 8 I $5.75 $5.05 View
LT1374IS8-5SYNC#PBF SO 8 I $5.75 $5.05 View
LT1374IS8-SYNC SO 8 I $5.75 $5.05 View
LT1374IS8-SYNC#PBF SO 8 I $5.75 $5.05 View
LT1374IT7 TO-220 7 I $6.15 $5.30 View
LT1374IT7#PBF TO-220 7 I $6.15 $5.30 View
LT1374IT7-5 TO-220 7 I $6.15 $5.30 View
LT1374IT7-5#PBF TO-220 7 I $6.15 $5.30 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Evaluation Kits

Part Number Description Price
DC474A LT1374CFE | 4A, 500KHz Step Down Switching Regulator, 5-25Vin up to 4A, Jmpr Selectable 3.3 or 5Vout $100.00
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Applications

  • Portable Computers
  • Battery-Powered Systems
  • Battery Chargers
  • Distributed Power
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Simulate

To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.

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