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Eutech Microelectronics

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EUP3291 Datasheet

2.25MHz Synchronous Step-Down DC/DC Regulator

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1.5A, 2.25MHz Synchronous
Step-Down DC/DC Regulator
The EUP3291 is synchronous step-down DC-DC
converters optimized for battery powered portable
applications. The 2.7V to 5.5V input voltage range
makes EUP3291 ideal for powering portable equipment
that runs from 1-cell Li-Ion or 3-cell NiMH/NiCD
batteries. The device is also suitable to operate from a
standard 3.3V or 5V voltage rail.
The EUP3291 operates at 2.25MHz fixed switching
frequency allowing the use of small inductors and
capacitors to achieve a small solution size. The internal
synchronous switch increases efficiency and eliminates
the need for an external schottky diode. The EUP3291
has internal soft start and avoids inrush current during
The EUP3291 has a user selectable mode of forced
PWM and PFM/PWM mode. The forced PWM mode
operation provides the lowest ripple noise and the PFM
mode operation provides high efficiency at light loads.
The EUP3291 is available in TDFN-6 package and it
provides up to 1.5A output current.
High Efficiency Up to 95%
2.25MHz Constant Switching Frequency
1.5A Available Load Current
30µA Typical Quiescent Current
2.7V to 5.5V Input Voltage Range
Adjustable Output Voltage as Low as 0.6V
No Schottky Diode Required
Short Circuit and Thermal Protection
Internal Soft Start Function
Available in TDFN-6 Package
RoHS Compliant and 100% Lead(Pb)-Free
SSD Module
Smart Phones
Tablet PC
Portable Media Players
µC/µP, FPGA and DSP Power
Plug-in DC/DC Modules for Routers and
Typical Application Circuit
DS3291 Ver1.0 Mar. 2013
Figure 1.

Part Number EUP3291
Description 2.25MHz Synchronous Step-Down DC/DC Regulator
Maker Eutech Microelectronics
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