Power Management Switching Regulator Step-Down (Buck) Regulators External Power Switch Buck Controllers

LTC1530 - High Power Synchronous Switching Regulator Controller

Features

  • High Power Buck Converter from 5V or 3.3V Input
  • Adjustable Current Limit in S0-8 with Topside FET RDS(ON) Sensing
  • No External Sense Resistor Required
  • Hiccup Mode Current Limit Protection
  • Adjustable, Fixed 1.9V, 2.5V, 2.8V and 3.3V Output
  • All N-Channel MOSFET Synchronous Driver
  • Excellent Output Regulation: +/-2% over Line, Load and Temperature Variations
  • High Efficiency: Over 95% Possible
  • Fast Transient Response
  • Fixed 300kHz Frequency Operation
  • Internal Soft Start Circuit
  • Quiescent Current: 1mA, 45µA in Shutdown

Typical Application

LTC1530 Typical Application
LTC1530 Typical Application

Description

The LTC1530 is a high power synchronous switching regulator controller optimized for 5V to 1.3V-3.5V output applications.Its synchronous switching architecture drives two external N-channel MOSFET devices to provide high efficiency. The LTC1530 contains a precision trimmed reference and feedback system that provides worst-case output voltage regulation of ±2% over temperature, load current and line voltage shifts. Current limit circuitry senses the output current through the on-resistance of the topside N-channel MOSFET, providing an adjustable current limit without requiring an external low value sense resistor.

The LTC1530 includes a fixed frequency PWM oscillator that free runs at 300kHz, providing greater than 90%efficiency in converter designs from 1A to 20A of output current. Shutdown mode drops the LTC1530 supply current to 45µA.

The LTC1530 is specified for commercial and industrial temperature ranges and is available in the S0-8 package.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC1530CS8-1.9#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530CS8-2.5#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530CS8-2.5#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530CS8-2.8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530CS8-3.3#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530CS8-3.3#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1530IS8-1.9#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1530IS8-1.9#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1530IS8-2.8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1530IS8-2.8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1530IS8-3.3#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1530IS8-3.3#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1530IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1530IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LTC1530 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC1530CS8-1.9#PBF SO-8 C $3.35 $3.05 Yes
LTC1530CS8-2.5#PBF SO-8 C $3.35 $3.05 Yes
LTC1530CS8-2.5#TRPBF SO-8 C $3.11 Yes
LTC1530CS8-2.8#PBF SO-8 C $3.35 $3.05 Yes
LTC1530CS8-3.3#PBF SO-8 C $3.35 $3.05 Yes
LTC1530CS8-3.3#TRPBF SO-8 C $3.11 Yes
LTC1530CS8#PBF SO-8 C $3.35 $3.05 Yes
LTC1530CS8#TRPBF SO-8 C $3.11 Yes
LTC1530IS8-1.9#PBF SO-8 I $3.99 $3.35 Yes
LTC1530IS8-1.9#TRPBF SO-8 I $3.41 Yes
LTC1530IS8-2.8#PBF SO-8 I $3.99 $3.35 Yes
LTC1530IS8-2.8#TRPBF SO-8 I $3.41 Yes
LTC1530IS8-3.3#PBF SO-8 I $3.99 $3.35 Yes
LTC1530IS8-3.3#TRPBF SO-8 I $3.41 Yes
LTC1530IS8#PBF SO-8 I $3.99 $3.35 Yes
LTC1530IS8#TRPBF SO-8 I $3.41 Yes
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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.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC235A LTC1530CS8 | High Efficiency Boost Regulator, 3.3Vin, 5Vout @ 5A Contact Factory
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Click here to view our complete list of demo boards

Applications

  • Power Supply for Pentium II, AMD-K6-2, SPARC, ALPHA and PA-RISC Microprocessors
  • High Power 5V to 1.3V-3.5V Regulators

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1530
LTC1530-1.9
LTC1530-2.5
LTC1530-2.8
LTC1530-3.3

Technical Support