Products - Step-Down

The XC9711 series is 60V bootstrap synchronous step-down DC/DC converter with built-in Nch-Nch driver FETs.

The XC9711 series has operating voltage range of 4.5V~60.0V, the output voltage can be set from 2.5V to 15.0V. It can support 1.0A as an output current with high-efficiency and stable voltage.

The switching frequency is 800kHz, and the operation mode can be selected between PWM control and PWM/PFM control with the MODE pin. When PWM control is operated, the frequency is constant regardless of the load, so noise countermeasures are easy. PWM/PFM control can achieve high efficiency from light loads to heavy loads.

The same part number can be used for multiple power supply lines because the set value of the output voltage can be changed using an external resistor.  It is possible to externally adjust the soft-start time longer than the internal soft-start using an external resistor and capacitor connected to EN/SS pin.

In addition, the power good function monitors the state of the output voltage. The soft start external adjustment function and power good function make it easy to configure the power supply sequence.   Built-in protection functions include current limit, over voltage protection, thermal shutdown and Lx short protection for safety operation.

• Input Voltage Range : 4.5V ~ 60.0V (Absolute Max 61.5V)
• Output Voltage Range : 2.5V ~ 18.0V FB Voltage : 0.75V±1.5%
• Maximum Output Current : 1.0A
• Oscillation Frequency : 800kHz
• Control Methods : PWM control (MODE=”H”) PWM/PFM control (MODE=”L”)
• Protection Functions : Current Limit (Foldback) Output Over Voltage Protection Thermal Shutdown Lx short protection
• Functions : Power Good, UVLO Soft-start (external adjustment)
• DFN3030-12A (3.0x3.0x 0.75mm) HSOP-8N Packages