LTC1709-8
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LTC1709-8

2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulators

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $5.97
Features
  • Single Controller Operates Two Output Stages Antiphase Reducing Required Input Capacitance and Power Supply Induced Noise
  • Two 5-Bit Desktop VID Codes:
    • LTC1709-8 For VRM8.4 (VOUT from 1.3V to 3.5V)
    • LTC1709-9 For VRM9.0 (VOUT from 1.1V to 1.85V)
  • Current Mode Control Ensures Best Current Sharing
  • True Remote Sensing Differential Amplifier
  • Power Good Output Indicator
  • OPTI-LOOP Compensation Minimizes COUT
  • Programmable Fixed Frequency: 150kHz to 300kHz
  • ±1% Output Voltage Accuracy
  • Wide VIN Range: 4V to 36V Operation
  • Adjustable Soft-Start Current Ramping
  • Internal Current Foldback and Short-Circuit Shutdown
  • Overvoltage Soft Latch Eliminates Nuisance Trips
  • Low Shutdown Current: 20µA
  • Available in 36-Lead Narrow SSOP Package
Additional Details
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The LTC1709-8/LTC1709-9 are 2-phase, VID programmable, synchronous step-down switching regulator controllers that drive two 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 from 150kHz 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 an 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 for high current applications.

The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipation during short-circuit conditions when the overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values. The LTC1709-8/LTC1709-9 implement two different VID tables compliant with VRM8.4 and VRM9.0 respectively.

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

  • Workstations
  • Internet Servers
  • Large Memory Arrays
  • DC Power Distribution Systems

Part Models 2
1ku List Price Starting From $5.97

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC1709EG-8#PBF
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LTC1709EG-8#TRPBF
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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-8#PBF

PRODUCTION

LTC1709EG-8#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-8#PBF

PRODUCTION

LTC1709EG-8#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC292B-B

LTC1709EG-8 | High Current VRM 8.4 CPU Power Supply, 12VIN, 1.6VOUT @ 45A, (mostly Surface Mount Caps)

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DC292B-B

LTC1709EG-8 | High Current VRM 8.4 CPU Power Supply, 12VIN, 1.6VOUT @ 45A, (mostly Surface Mount Caps)

LTC1709EG-8 | High Current VRM 8.4 CPU Power Supply, 12VIN, 1.6VOUT @ 45A, (mostly Surface Mount Caps)

Product Detail

DC292B-B: Demo Board for the LTC1709-8 2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulators.

reference details image

DC292A

LTC1709EG-8 | High Current Microprocessor Supply, 12VIN, 1.6VOUT @ 52A, (10mm × 20mm Thru-hole Sanyo Caps)

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DC292A

LTC1709EG-8 | High Current Microprocessor Supply, 12VIN, 1.6VOUT @ 52A, (10mm × 20mm Thru-hole Sanyo Caps)

LTC1709EG-8 | High Current Microprocessor Supply, 12VIN, 1.6VOUT @ 52A, (10mm × 20mm Thru-hole Sanyo Caps)

Product Detail

DC292A: Demo Board for the LTC1709-8 2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulators.

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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