EUP3475 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – 3A, 28V, 1MHz Synchronous Step-Down Converter

EUP3475
3A, 28V, 1MHz Synchronous
Step-Down Converter
DESCRIPTION
The EUP3475 is a 1MHz fixed frequency
synchronous current mode buck regulator. The device
integrates both 135m high-side switch and 90m
low-side switch that provide 3A of continuous load
current over a wide operating input voltage of 4.5V to
28V.The internal synchronous power switch increases
efficiency and eliminates the need for an external
Schottky diode. Current mode control provides fast
transient response and cycle-by-cycle current limit.
The EUP3475 features short circuit and thermal
protection circuits to increase system reliability.
Externally programmable soft-start allows for proper
power on sequencing with respect to other power
supllies and avoids input inrush current during startup.
In shutdown mode, the supply current drops below
1µA. The EUP3475 is available in SOP-8 package
with the exposed pad.
FEATURES
z 3A Continuous Output Current
z 110ns Minimum On Time
z Integrated 135m High Side Switch
z Integrated 90m Low Side Switch
z Wide 4.5V to 28V Operating Input Range
z Output Adjustable from 0.8V to 24V
z Up to 95% Efficiency
z Programmable Soft-Start
z <1µA Shutdown Current
z 1MHz Fixed Switching Frequency
z Thermal Shutdown and Over Current Protection
z Input Under Voltage Lockout
z Available in SOP-8 (EP) package
z RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
Typical Application Circuit
APPLICATIONS
z Distributed Power Systems
z Networking Systems
z FPGA, DSP, ASIC Power Supplies
EUP3475 Ver 1.1 Oct. 2009
Figure 1.
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