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FAN23SV56 — 6 A Synchronous Buck Regulator
September 2015
FAN23SV56
6 A Synchronous Buck Regulator
Features
V
IN
Range: 7 V to 24 V Using Internal Linear
Regulator for Bias
V
IN
Range: 4.5 V to 5.5 V with V
IN
/P
VIN
/P
VCC
Connected to Bypass Internal Regulator
High Efficiency: Over 96% Peak
Continuous Output Current: 6 A
Accurate Enable Facilitates V
IN
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
Description
The FAN23SV56 is a highly efficient 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 V
IN
, P
VIN
, and P
VCC
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
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Embedded System
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