Step-Down DC/DC Converters - Analog Technologies, Inc.

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Analog Technologies, Inc.
1161 Ringwood Ct, #110
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U.S.A.

Tel.: 408-748-9100

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Home > Integrated Circuits > Step-Down DC/DC Converters > AT9451

40V 600mA DC-DC Step-Down Converter AT9451

Part #	5-9 PCs	10-49 PCs	50-99 PCs	100-499	500-999	≥100 PCs	Buy Now	Datasheet
AT9451	$0.48	$0.46	$0.44	$0.42	$0.40	$0.38			0

Part Number	Unit Price	Datasheet
AT9451	$0.48

FEATURES

Input Voltage Range: 4.2V to 40V
500mΩ Internal Power MOSFET
1.8MHz Fixed Switching Frequency
Internally Compensated
Stable with Ceramic Output Capacitors
Internal Soft-start
Precision Current Limit without Current Sensing Resistor
High Efficiency: >90%
230μA Operating Quiescent Current
Output Peak Current: 0.6A
Low Shutdown Mode Current: <1μA
SOT23-6 Package

DESCRIPTION:

The AT9451 is a high frequency (1.8MHz) step-downswitching regulator with integrated internal high-sidehigh voltage power MOSFET. It provides single 0.6A (orless) highly efficient output with current mode controlfor fast loop response. The wide input range (4.2V to 40V) accommodates avariety of step-down applications under mobileenvironment input conditions. Low shutdown modequiescent current of 1μA is suitable for battery poweredapplications. High efficiency at light load condition isachieved by scaling down the switching frequency toreduce the switching and gate driving losses. Thefrequency folding technique helps prevent theinductance current from running out of control atstartup. Hot shutdown provides reliable, fault tolerantoperation.