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ON Semiconductor FAN23SV56

6 A Synchronous Buck Regulator

Overview

TopologyBuck Converter
Input voltage19 V
Switching frequency200-1500 kHz
Output 11.2 V / 6 A
IC revision1.11

Description

The FAN23SV56 TinyBuck™ is a highly efficient integrated synchronous buck regulator. The regulator is capable of operating with an input range from 7 V to 24 V and supporting 6 A continuous 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.

The FAN23SV56 utilizes Fairchild’s constant on-time control architecture to provide excellent transient response and maintain a relatively constant switching frequency. Pulse Frequency Modulation (PFM) Mode maximizes light-load efficiency by reducing switching frequency when the inductor is operating in Discontinuous Conduction Mode (DCM) at light loads, while clamping the minimum frequency above the audible range with Ultrasonic Mode.

Switching frequency and over-current protection can be programmed to provide a flexible solution for various applications. Output over-voltage, under-voltage, over-current, and thermal shutdown protections help prevent damage to the device during fault conditions. A hysteresis feature restarts the device when normal operating temperature is reached.

Features

  • VIN Range: 7 V to 24 V UsingInternal Linear Regulator for Bias
  • VIN Range: 4.5 V to 5.5 V withVIN/PVIN/PVCC Connected to Bypass Internal Regulator
  • High Efficiency: Over 96% Peak
  • Continuous Output Current: 6 A
  • Accurate Enable Facilitates VIN UVLO Functionality
  • PFM Mode for Light-Load Efficiency
  • Excellent Line and Load Transient Response
  • Precision Reference: ±1% Over Temperature
  • Output Voltage Range: 0.6 to 5.5 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

Typical applications

  • Mainstream Notebooks
  • Strorage
  • Base Stations
  • Game Consoles
  • Servers and Desktop Computers
  • Telecommunications

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
LR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Samples
744325120
STE ALT EAG CAD LTS PSP SPE IGS CADWE-HCI SMT Flat Wire High Current Inductor 1.2 20 1 25 1.8 75 Superflux SMT
Order Code Data­sheet
744325120
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
LR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Samples