EUP3291 EUTECH | Alldatasheet
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Technical content
DS3291 Ver1.0 Mar. 2013 1.5A, 2.25MHz Synchronous Step-Down DC/DC Regulator
DESCRIPTION
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 startup. 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. Typical Application Circuit
FEATURES
/circle6 High Efficiency Up to 95% /circle6 2.25MHz Constant Switching Frequency /circle6 1.5A Available Load Current /circle6 30µA Typical Quiescent Current /circle6 2.7V to 5.5V Input V oltage Range /circle6 Adjustable Output V oltage as Low as 0.6V /circle6 No Schottky Diode Required /circle6 Short Circuit and Thermal Protection /circle6 Internal Soft Start Function /circle6 Available in TDFN-6 Package /circle6 RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free
APPLICATIONS
/circle6 SSD Module /circle6 Smart Phones /circle6 Tablet PC /circle6 Portable Media Players /circle6 µC/ µP, FPGA and DSP Power /circle6 Plug-in DC/DC Modules for Routers and Switchers Figure 1.