ZHCSLI5 September 2020 LM34966-Q1
PRODUCTION DATA
The LM34966-Q1 is a wide input range, non-synchronous boost controller that uses peak-current-mode control. The device can be used in boost, SEPIC, and flyback topologies.
The device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V. The internal VCC regulator also supports BIAS pin operation up to 40 V (45-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable with an external resistor from 100 kHz to 500 kHz.
The device features a 1.0-A standard MOSFET driver and a low 100-mV current limit threshold. The device also supports the use of an external VCC supply to improve efficiency. Low operating current and pulse skipping operation improve efficiency at light loads.
The device has built-in protection features such as cycle-by-cycle current limit, overvoltage protection, line UVLO, thermal shutdown, and hiccup mode overload protection. Additional features include low shutdown IQ, programmable soft start, programmable slope compensation, precision reference, power good indicator, and external clock synchronization.