4 A Synchronous Buck Regulator for DDR Termination

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Overview

The FAN23SV04TAMPX is a highly efficient, integrated synchronous buck regulator for use in tracking applications, such as DDR termination rails. The VDDQ input includes an internal 2:1 resistive voltage divider to reduce total circuit size and component count. The regulator operates with an input range from 7 V to 18 V and supports up to 4 A load currents. The device can operate from a 5 V rail (±10%) if VIN, PVIN, and PVCC are connected together to bypass the internal linear regulator.
This device utilizes ON Semiconductor’s constant on-time control architecture to provide excellent transient response and to maintain a relatively constant switching frequency.
Switching frequency and sourcing over-current protection can be programmed to provide a flexible solution for various applications.
Output over-current, and thermal shutdown protections help prevent damage during fault conditions. A hysteresis feature restarts the device when normal operating temperature is reached.

  • Servers, Desktop Computers
  • Notebooks, Netbooks
  • Game Consoles
  • Bus Termination
  • VIN Range: 7 V to 18 V Using Internal Linear Regulator for Bias
  • VIN Range: 4.5 V to 5.5 V with VIN/PVIN/PVCC Connected to Bypass Internal Regulator
  • High Efficiency
  • Continuous Output Current: 4 A
  • Internal Linear Bias Regulator
  • Internal VDDQ Resistor Divider
  • Excellent Line and Load Transient Response
  • Output Voltage Range: 0.5 to 1.5 V
  • Programmable Frequency: 200 kHz to 1.5 MHz
  • Programmable Soft-Start
  • Low Shutdown Current
  • Adjustable Sourcing Current Limit
  • Internal Boot Diode
  • Thermal Shutdown
  • Halogen and Lead Free, RoHS Compliant

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FAN23SV04TAMPX

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H

P

PQFN-34

1

260

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3000

N

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Hysteretic

null

18

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4

≥90%

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