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

LT1170 - 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators

Features

  • Wide Input Voltage Range: 3V to 60V
  • Low Quiescent Current: 6mA
  • Internal 5A Switch (2.5A for LT1171, 1.25A for LT1172)
  • Shutdown Mode Draws Only 50µA Supply Current
  • Very Few External Parts Required
  • Self-Protected Against Overloads
  • Operates in Nearly All Switching Topologies
  • Flyback-Regulated Mode Has Fully Floating Outputs
  • Comes in Standard 5-Pin Packages
  • LT1172 Available in 8-Pin MiniDIP and Surface Mount
    Packages
  • Can Be Externally Synchronized

Typical Application

LT1170
LT1170
Back to Top

Description

The LT1170/LT1171/LT1172 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward, inverting and “Cuk”. A high current, high efficiency switch is included on the die along with all oscillator,control and protection circuitry. Integration of all functions allows the LT1170/LT1171/LT1172 to be built in a standard 5-pin TO-3 or TO-220 power packages well as the 8-pin packages (LT1172). This makes them extremely easy to use and provides “bust proof” operation similar to that obtained with 3-pin linear regulators.

The LT1170/LT1171/LT1172 operate with supply voltages from 3V to 60V, and draw only 6mA quiescent current. They can deliver load power up to 100W with no external power devices. By utilizing current-mode switchingtechniques, they provide excellent AC and DC load andline regulation.

The LT1170/LT1171/LT1172 have many unique features not found even on the vastly more difficult to use lowpower control chips presently available.They use adaptive antisat switch drive to allow very wide ranging load current swith no loss in efficiency. An externally activated shutdown mode reduces total supply current to 50µA typically for standby operation.

Back to Top

Packaging

N-8, J8, SO-8, SW-16, T5, DD-5

Back to Top

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1170CQ DD PAK 5 C $7.58 $6.00 View
LT1170CQ#PBF DD PAK 5 C $7.58 $6.00 View
LT1170CQ#TR DD PAK 5 C   $6.12 View
LT1170CQ#TRPBF DD PAK 5 C   $6.12 View
LT1170CT TO-220 5 C $7.08 $5.60 View
LT1170CT#06PBF TO-220 5 C $7.08 $5.60 View
LT1170CT#PBF TO-220 5 C $7.08 $5.60 View
LT1170HVCQ DD PAK 5 C $8.60 $7.50 View
LT1170HVCQ#PBF DD PAK 5 C $8.60 $7.50 View
LT1170HVCQ#TR DD PAK 5 C   $7.62 View
LT1170HVCQ#TRPBF DD PAK 5 C   $7.62 View
LT1170HVCT TO-220 5 C $9.17 $7.25 View
LT1170HVCT#06PBF TO-220 5 C $9.17 $7.25 View
LT1170HVCT#PBF TO-220 5 C $9.17 $7.25 View
LT1170HVIT TO-220 5 I $11.90 $9.65 View
LT1170HVIT#PBF TO-220 5 I $11.90 $9.65 View
LT1170IQ DD PAK 5 I $9.50 $7.80 View
LT1170IQ#PBF DD PAK 5 I $9.50 $7.80 View
LT1170IQ#TR DD PAK 5 I   $7.92 View
LT1170IQ#TRPBF DD PAK 5 I   $7.92 View
LT1170IT TO-220 5 I $9.25 $7.60 View
LT1170IT#PBF TO-220 5 I $9.25 $7.60 View
Buy Now
Request Samples
* 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.

Back to Top

Applications

  • Logic Supply 5V at 10A
  • 5V Logic to ±15V Op Amp Supply
  • Battery Upconverter
  • Power Inverter (+ to -) or (- to +)
  • Fully Floating Multiple Outputs
Back to Top

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.

Back to Top