EUP3455 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – 1.5A,40V,200KHz Step-Down Converter

EUP3455
1.5A,40V,200KHz Step-Down Converter
DESCRIPTION
The EUP3455 is current mode, step-down switching
regulator capable of driving 1.5A continuous load with
excellent line and load regulation. The EUP3455
operates with an input voltage range from 4.75V to
40V and the output voltage is externally set from
0.92V to 15V with a resistor divider. The output
current threshold is programmed by an external resistor.
The EUP3455 enters into the CC (constant current)
mode when output reaches over current threshold. The
OV (over voltage) threshold is programmed by an
external resistor divider. The EUP3455 stops switching
when output reaches over voltage threshold.
Fault condition protection includes secondary
cycle-by-cycle current limit and thermal shutdown. In
shutdown mode the regulator draws 3µA of supply
current. Internal soft-start minimizes the inrush supply
current and the output overshoot at initial startup.
The EUP3455 require a minimum number of external
components.
FEATURES
4.75V to 40V Wide Input Operating Range
Output Adjustable from 0.92V to 15V
Up to 1.5A Output Current
Programmable Output Current Threshold
Programmable Output Over Voltage Threshold
3µA Low Shutdown Current
0.1Ω Internal DMOS Output Switch
Up to 95% Efficiency
Fixed 200kHz Switching Frequency
Internal Soft Start
Secondary Cycle-by-Cycle Current Limit
Thermal Shutdown
Input Supply Undervoltage Lockout
Available SOP-8 Package
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
APPLICATIONS
Car Charger/Adaptor
Rechargeable Portable Devices
Distributive Power Systems
Pre-regulator for Linear Regulators
Typical Application Circuit
DS3455 Ver1.0 Nov. 2011
Figure 1. 5V Application Circuit
1