LTC1709
Info: : PRODUCTION
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LTC1709

2-Phase, 5-Bit Adjustable,High Efficiency, Synchronous Step-Down Switching Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $6.87
Features
  • Two Ouput Stages Operate Antiphase Reducing Input Capacitance and Power Supply Noise
  • 5-Bit VID Control (VRM 8.4 Compliant)
    VOUT: 1.3V to 3.5V in 50mV/100mV Steps
  • Current Mode Control Ensures Current Sharing
  • True Remote Sensing Differential Amplifier
  • OPTI-LOOP Compensation Minimizes COUT
  • Programmable Fixed Frequency: 150kHz to 300kHz—Effective 300kHz to 600kHz Switching Frequency
  • ±1% Output Voltage Accuracy
  • Wide VIN Range: 4V to 36V Operation
  • Adjustable Soft-Start Current Ramping
  • Internal Current Foldback
  • Short-Circuit Shutdown Timer with Defeat Option
  • Overvoltage Soft-Latch Eliminates Nuisance Trips
  • Low Shutdown Current: 20µA
  • Small 36-Lead Narrow (0.209") SSOP Package
Additional Details
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The LTC1709 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a fixed frequency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient response while operating each channel at a optimum frequency for efficiency. Thermal design is also simplified.

An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output terminals as required in high current applications.

The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipaton during short-circuit conditions when overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values.

Vout Range VRM
LTC1709 1.3V to 3.5V VRM8.4
LTC1709-7 0.925V to 2V Mobile
LTC1709-8 1.3V to 3.5V VRM8.4
LTC1709-85 1.05V to 1.825V VRM8.5
LTC1709-9 1.1V to 1.85V VRM9.0

Applications

  • Desktop Computers
  • Internet/Network Servers
  • Large Memory Arrays
  • DC Power Distribution Systems
  • Battery Chargers
Part Models 2
1ku List Price Starting From $6.87

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC1709EG#PBF
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Product Lifecycle

PCN

Nov 18, 2019

- 19_0266

Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

LTC1709EG#PBF

PRODUCTION

LTC1709EG#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Nov 18, 2019

- 19_0266

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Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

LTC1709EG#PBF

PRODUCTION

LTC1709EG#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

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.

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