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FAN23SV04TAMPX — 4 A Synchronous Buck Regulator for DDR Termination
September 2015
FAN23SV04TAMPX
4 A Synchronous Buck Regulator for DDR Termination
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
Continuous Output Current: 4 A
Internal Linear Bias Regulator
Internal V
DDQ
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
Description
The FAN23SV04TA is a highly efficient, synchronous
buck regulator for use in tracking applications, such as
DDR termination rails. The V
DDQ
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 V
IN
, P
VIN
, and P
VCC
are connected together to bypass the internal linear
regulator.
This device utilizes Fairchild’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
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