JAJSPC6 November 2023 TPS61377
PRODUCTION DATA
The TPS61377 is a fully-integrated high voltage synchronous boost converter with a low side 50 mΩ power switch and a 40 mΩ high side rectifier switch to provide a high efficiency and small size solution. The TPS61377 has a wide input voltage range of 2.9 V to 23 V, and can delivery up to 25 V output voltage with a peak switching current of typical 6 A. The peak switching current is programmable by a resistor connected between the ILIM pin and GND.
The TPS61377 uses the adaptive constant off-time peak current control topology to regulate the output voltage. Under moderate to heavy load condition, the TPS61377 operates in pulse width modulation (PWM) mode. As with conventional adaptive off-time converters, the device varies the off-time as a function of input and output voltage to maintain a near constant frequency. At light load, the device has two operating modes that can be selected via the MODE pin. When the MODE pin is low, the device operates in pulse frequency modulation (PFM) mode to improve light load efficiency. The off-time is modulated by the feedback loop and is extended as the load becoms lighter. When the MODE pin is high, the device operates in forced PWM mode to avoid audible noise and other application problems caused by low switching frequency. The TPS61377 uses external loop compensation, giving the flexibility to use different inductors and output capacitors.
The TPS61377 implements a soft-start function and provides output overvoltage protection, cycle-by-cycle overcurrent protection, and thermal shutdown protection.