LM3370

LM3370 www.ti.com SNVS406N – NOVEMBER 2005 – REVISED MAY 2013 LM3370 Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function Check for Samples: LM3370 FEATURES 1 2 I2C-compatible interface – VOUT1 = 1V to 2V in 50 mV Steps – VOUT2 = 1.8V to 3.3V in 100 mV Steps – Automatic PFM/PWM Mode Switching and Forced PWM Mode for Low Noise Operation – Spread Spectrum Capability Using I2C 600mA Load Per Channel 2MHz PWM Fixed Switching Frequency (Typ.) The Bucks Operate 180° Out-of-Phase Timing Offset for Noise and Input Surge Current Abatement Internal Synchronous Rectification for High Efficiency Internal Soft Start Power-on-Reset Function for Both Outputs 2.7V ≤ VIN ≤ 5.5V Operates from a Single Li-Ion Cell or 3 Cell NiMH/NiCd Batteries and 3.3V/5.5V Fixed Rails 2.2µH Inductor, 4.7µF Input and 10µF Output Capacitor Per Channel 16-lead WSON Package (4 mm x 5 mm x 0.8 mm) 20-Bump DSBGA Package (3.0 mm x 2.0 mm x 0.6 mm) APPLICATIONS Baseband Processors Application Processors (Video, Audio) I/O Power FPGA Power and CPLD DESCRIPTION The LM3370 is a dual step-down DC-DC converter optimized for powering ultra-low voltage circuits from a single Li-Ion battery and input rail ranging from 2.7V to 5.5V. It provides two outputs with 600mA load per channel. The output voltage range varies from 1V to 3.3V and can be dynamically controlled using the I2Ccompatible interface. This dynamic voltage scaling function allows processors to achiev...