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FAN23SV15MAMPX — 15 A Synchronous Buck Regulator
November 2015
FAN23SV15MAMPX
15 A Synchronous Buck Regulator
Features
V
IN
Range: 7 V to 18 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: 15 A
Internal Linear Bias Regulator
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 MHz
Programmable Soft-Start
Low Shutdown Current
Adjustable Sourcing Current Limit
Internal Boot Diode
Thermal Shutdown
Halogen and Lead Free, RoHS Compliant
Description
The FAN23SV15MA is a highly efficient synchronous
buck regulator. The regulator is capable of operating
with an input range from 7 V to 18 V and supporting up
to 15 A 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 FAN23SV15MA utilizes Fairchild’s constant on-time
control architecture to provide excellent transient
response and to maintain a relatively constant switching
frequency. The device utilizes Pulse Frequency
Modulation (PFM) mode to maximize light-load
efficiency by reducing switching frequency when the
inductor is operating in discontinuous conduction mode
at light loads.
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. After thermal shutdown is activated, a
hysteresis feature restarts the device when normal
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