[Active-Semi, Inc.]
GENERAL DESCRIPTION
The ACT4070 is a current-mode step-down DC/DC converter that generates up to 3A output current at 400kHz switching frequency. The device utilizes Active- Semi’s proprietary ISOBCD30 process for operation with input voltage up to 30V. Consuming only 6μA in shutdown mode, the ACT4070 is highly efficient with peak efficiency at 95% when in operation. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency fold back at short circuit. The device also includes an internal soft start function to prevent overshoot.
FEATURES
3A Output Current
Up to 95% Efficiency
4.5V to 30V Input Range
6µA Shutdown Supply Current
400kHz Switching Frequency
Adjustable Output Voltage
Cycle-by-Cycle Current Limit Protection
Thermal Shutdown Protection
Internal Soft Start Function
Frequency Fold Back at Short Circuit
Stability with Wide Range of Capacitors,
Including Low ESR Ceramic Capacitors
SOP-8/EP (Exposed Pad) Package