DC-DC Converter. GS5159 Datasheet
24V 1.5A 1.4MHz Asynchronous Step-Down DC-DC
The GS5159 is a monolithic step-down switch
mode converter with a built-in power MOSFET. It
achieves 1.5A peak output current over a wide
input supply range with excellent load and line
regulation. Current mode operation provides fast
transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown.
The GS5159 requires a minimum number of
readily available standard external components.
The GS5159 is available in SOT23-6L packages.
1.5A Peak Output Current
0.3Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Up to 92% Efficiency
Fixed 1.4MHz Frequency
Current Mode Operation
Over Temperature Protection
Cycle-by-Cycle Over Current Protection
Wide 4.5V to 24V Operating Input Range
Output Adjustable from 0.81V to 15V
0.1uA Shutdown Current
Distributed Power Systems
Pre-Regulator for Linear Regulators
Functional Block Diagram
Packages & Pin Assignments
Bootstrap. A 10nF capacitor is connected between SW and BS pins to
drive the power switch’s gate above the supply voltage.
Ground. This pin is the voltage reference for the regulated output
voltage. For this reason care must be taken in its layout.
Feedback. An external resistor divider from the output to GND, tapped
to the FB pin sets the output voltage.
On/Off Control Input. Pull EN above 1.5V to turn the device on.
Power Supply Input. Drive 4.5V to 24V voltage to this pin to power on
this chip. Connecting a 10uF ceramic bypass capacitor between VIN
and GND to eliminate noise.
Switch Output. Connect this pin to the switching end of the inductor.
Q’ty / Reel