EUP3420
2A/1.5MHz, Synchronous
Step-Down Converter with Soft Start
DESCRIPTION
The EUP3420 is a synchronous current mode
step-down dc-dc converter, capable of delivering 2A
load current with excellent line and load regulation.
Operating with an input voltage range between 2.7V
and 5.5V, the device is ideal for portable applications
powered by a single Li-Ion battery cell or by 3-cell
NiMH/NiCd batteries. The EUP3420 operates at
1.5MHz fixed frequency PWM mode and provides very
low output ripple voltage for noise sensitive
applications. The internal integrated synchronous
switch increases efficiency while eliminates the need
for an external Schottky diode. The EUP3420 is
available in the 10-pin MSOP and 10-pin TDFN
package.
FEATURES
High Efficiency up to 96%
Up to 2A Load Current
300µA Typical Quiescent Current
1.5MHz Constant Switching Frequency
2.7V to 5.5V Input Voltage Range
Adjustable Output Voltage as Low as 0.7V
100% Duty Cycle Low Dropout Operation
No Schottky Diode Required
Short Circuit and Thermal Protection
Excellent Line and Load Transient Response
＜1µA
Shutdown Current
Built-In Soft-Start
Available in MSOP-10 and TDFN-10 Package
RoHS Compliant and 100% Lead(Pb)-Free
APPLICATIONS
Cellular and Smart Phones
Portable Media Players/ MP3 Players
Digital Still and Video Cameras
Portable Instruments
WLAN PC Cards
Typical Application Circuit
Figure 1.
DS3420
Ver1.2
Mar. 2009
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
