LTC3738

PRODUCTION

3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning

Data Sheet Product Selection Table
Part Models
2
1ku List Price
Starting From $5.59
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Part Details

  • 3-Phase Controller with Onboard MOSFET Drivers
  • Programmable Active Voltage Positioning (AVP) with True Current Sensing
  • Programmable External Thermal Detection or Internal Thermal Sensing
  • Precise Output Current Matching Optimizes Thermal Performance and Solution Size
  • Supports Starting into Precharged VOUTS
  • Differential Amplifier Accurately Senses VOUT
  • PWM, Pulse Skip and Stage Shedding™ Operation
  • Synchronizable
  • 210kHz to 530kHz Per Phase, Fixed Frequency
  • Output Power Good Indicator with Adaptive Blanking
  • Adjustable Soft-Start Current Ramping
  • Short-Circuit Shutdown Timer with Defeat Option
  • OPTI-LOOP® Compensation Minimizes COUT
  • 38-Lead (5mm × 7mm) QFN Package
LTC3738
3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning
VRM10 Step-Down Controller Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Multiple Output Buck Regulators 1
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Evaluation Kits

eval board
schematic 1
DC721A-A

LTC3738CUHF/LTC3731CUH Demo Board | 6-Phase, 8V ≤ VIN ≤ 14V, VOUT = VRM9.X / 10.X @ 120A

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Product Details

Demonstration circuits 721A-A and 721A-B are high current step-down converters for Intel VRM/VRD10 and VRM9 processor power applications. The 6-phase DC721A-A features two current-mode PolyPhaseTM controllers, the LTC3738CUHF (3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning and the the LTC3731CUH (3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller) and provides up to 120A output current. The input voltage is from 8V to 14V and the output voltage is controlled by the VID setting.

eval board
schematic 2
DC721A-B

LTC3738CUHF Demo Board | 3-Phase, 8V ≤ VIN ≤ 14V, VOUT = VRM9.X/10.X @ 65A

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Product Details

Demonstration circuits 721A-A and 721A-B are high current step-down converters for Intel VRM/VRD10 and VRM9 processor power applications. The 6-phase DC721A-A features two current-mode PolyPhaseTM controllers, the LTC3738CUHF (3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning and the the LTC3731CUH (3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller). and provides up to 120A output current. The DC721A-B is a single LTC3738 3-phase 65A output supply. The input voltage range for both demo boards is from 8V to 14V, and the output voltage is controlled by the VID setting.
DC721A-A
LTC3738CUHF/LTC3731CUH Demo Board | 6-Phase, 8V ≤ VIN ≤ 14V, VOUT = VRM9.X / 10.X @ 120A
DC721A-A - Schematic
DC721A-B
LTC3738CUHF Demo Board | 3-Phase, 8V ≤ VIN ≤ 14V, VOUT = VRM9.X/10.X @ 65A
DC721A-A - Schematic

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