EUP3419
Dual 1.5MHz, 1A Synchronous
Step-Down Converter
DESCRIPTION
The EUP3419 contains two independent 1.5MHz
constant frequency, current mode, PWM step-down
converters. Each converter integrates a main switch and
a synchronous rectifier for high efficiency without an
external Schottky diode. The EUP3419 is ideal for
powering portable equipment that runs from a single
cell Lithium-Ion (Li+) battery. Each converter can
supply 1A of load current from a 2.5V to 5.5V input
voltage. The output voltage can be regulated as low as
0.6V. The EUP3419 can also run at 100% duty cycle
for low dropout applications. 25µA per channel
quiescent current at light loads increases efficiency and
battery life.
FEATURES
25µA Quiescent Current per Channel at Light
Load
Up to 96% Efficiency
1.5MHz Constant Switching Frequency
1A Load Current on Each Channel
2.5V to 5.5V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Short Circuit Protection
Thermal Fault Protection
<1µA Shutdown Current
Soft Start Function
3mm
×
3mm TDFN-10 Package
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
APPLICATIONS
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs and Portable Media Players
Wireless and DSL Modems
Digital Still and Video Cameras
Typical Application Circuit
Figure 1. Adjustable Voltage Regulator
DS3419
Ver1.0
Feb. 2010
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
