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Union UM3510DA

1A, 2.25MHz, Synchronous Step-Down DC-DC Converter


TopologyBuck Converter
Input voltage2.5-6 V
Switching frequency1950-2550 kHz
Output 11.8 V / 1 A
IC revision02


The UM3510 is a high efficiency pulse-width-modulated (PWM) synchronous step-down DC-DCconverter with an input voltage range of 2.5V to 6.0V. It provides up to 1000mA output currentfrom a single Li-ion cell. The UM3510 operates at 2.25MHz fixed switching frequency and entersPower Save Mode to maintain high efficiency at light load condition.For low noise applications, the device can be forced into fixed frequency PWM mode by pullingthe MODE pin high.


 High Efficiency: Up to 95% 2.25MHz Constant Switching Frequency 1000mA Output Current Integrated Main Switch and SynchronousRectifier. No Schottky Diode Required. 2.5V to 6.0V Input Voltage Range Low Quiescent Current: 56μA Thermal Fault Protection <1μA Shutdown Current

Typical applications

  • Wireless and DSL Modems, Microprocessors and DSP Core
  • Cellular and Smart Phones, PDAs, GPS, WLAN
  • Portable Instruments