Power Management Switching Regulator Step-Down (Buck) Regulators Multiple Output Buck
Power Management Switching Regulator Step-Down (Buck) Regulators Poly-Phase Buck Controllers
Power Management Switching Regulator Step-Down (Buck) Regulators External Power Switch Buck Controllers

LTC1702A - Dual 550kHz Synchronous 2-Phase Switching Regulator Controller

Features

  • Pin Compatible with the LTC1702 with Improved Current Limit Control
  • Two Sides Run Out-of-Phase to Minimize CIN
  • No External Current Sense Resistors
  • Excellent Output Regulation: 1% Total Output Accuracy
  • Two Independent Controllers in One Package
  • All N-Channel External MOSFET Architecture
  • 550kHz Switching Frequency Minimizes External Component Size
  • 1A to 25A Output Current per Channel
  • High Efficiency over Wide Load Current Range
  • Less Than 100µA Shutdown Current
  • Small 24-Pin Narrow SSOP Package

Typical Application

LTC1702A Typical Application

Description

The LTC1702A is a dual switching regulator controller optimized for high efficiency with low input voltages. It includes two complete, on-chip,independent switching regulator controllers each designed to drive a pair of external N-channel MOSFETs in a voltage mode feedback,synchronous buck configuration. The LTC1702A uses a constant-frequency, true PWM design switching at 550kHz, minimizing external component size and cost and maximizing load transient performance. The synchronous buck architecture automatically shifts to discontinuous and then to Burst Mode® operation as the output load decreases, ensuring maximum efficiency over a wide range of load currents.

The LTC1702A features an onboard reference trimmed to 0.5% and can provide better than 1% regulation at the converter outputs. Open-drain logic outputs indicate whether either output has risen to within 5% of the final output voltage and an optional latching FAULT mode protects the load if the output rises 15% above the intended voltage. Each channel can be enabled independently; with both channels disabled, the LTC1702A shuts down and supply current drops below 100µA.

Packaging

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

SSOP-24

LTC1702A Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC1702ACGN SSOP 24 C $5.62 $4.75 View
LTC1702ACGN#PBF SSOP 24 C $5.62 $4.75 View
LTC1702ACGN#TR SSOP 24 C $4.85 View
LTC1702ACGN#TRPBF SSOP 24 C $4.85 View
LTC1702AIGN SSOP 24 I $6.33 $5.35 View
LTC1702AIGN#PBF SSOP 24 I $6.33 $5.35 View
LTC1702AIGN#TR SSOP 24 I $5.45 View
LTC1702AIGN#TRPBF SSOP 24 I $5.45 View
LTC1702CGN SSOP 24 C $5.45 $4.75 View
LTC1702CGN#PBF SSOP 24 C $5.45 $4.75 View
LTC1702CGN#TR SSOP 24 C $4.85 View
LTC1702CGN#TRPBF SSOP 24 C $4.85 View
LTC1702IGN SSOP 24 I $6.33 $5.35 View
LTC1702IGN#PBF SSOP 24 I $6.33 $5.35 View
LTC1702IGN#TR SSOP 24 I $5.45 View
LTC1702IGN#TRPBF SSOP 24 I $5.45 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.

Demo Boards

Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request 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
DC275A LTC1702ACGN | Dual Output Buck Regulators, Vin = 5.0V, Fswitch = 550kHz, Vout1 = jmpr sel @ 15A, Vout2 = 3.3V @ 15A Contact Factory
DC473A LTC1702ACGN | High Efficiency Dual Output Power Supply, 3V~7Vin, 1.8Vout @ 5A and 2.5Vout @ 5A $150.00
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Applications

  • Microprocessor, DSP Core and I/O Supplies
  • Multiple Logic Supply Generator
  • Distributed Power Applications
  • High Efficiency Power Conversion

Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Related models available in LTspice IV
LTC1702
LTC1702A

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