LM3678
www.ti.com SNVS464C – APRIL 2008 – REVISED MAY 2013 High-Performance Miniature 1.5-A Step-Down DC-DC Converter for Handheld Applications
Check for Samples: LM3678 FEATURES DESCRIPTION The LM3678 step-down DC-DC converter is
optimized for powering low-voltage circuits from a
single Li-Ion cell battery and input voltage rails from
2.5 V to 5.5 V. It provides up to 1.5-A load current,
over the entire input voltage range. LM3678 offers a
0.8V or 1.2V option. One of the pair of voltages is set
through the VSELECT pin. 1 2 VOUT = 0.8 V or 1.2 V
VIN = 2.5 V to 5.5 V
1.5-A Maximum Load Capability
3.3-MHz (Typical) PWM Fixed Switching
Frequency Allows Use of 1-ВµH Inductor
В±3% DC Output Voltage Precision
0.01-ВµA (Typical) Shutdown Current
Internal Synchronous Rectification for High
Efficiency
Internal Soft Start
Current Overload and Thermal Shutdown
Protection LM3678 operates in PWM mode with a fixed
frequency of 3.3 MHz. Internal synchronous
rectification provides high efficiency during PWM
mode operation. In shutdown mode, the device turns …
