Products - Step-Up

PWM/PFM Step-Up DC/DC Controller

This part is not recommended for new designs, please use XC9121

 The XC6367/68 series are multi-functional step-up DC/DC converter controllers with built-in high speed, low ON resistance drivers. Large output currents are possible using an externally connected transistor, coil, diode and capacitor. Output voltage is selectable in 100mV steps within a range of 1.5V ~ 6.5V (± 2.5%). For output voltages outside this range, we recommend FB version, which has a 1.0V internal reference voltage. Using the FB version, the required output voltage can be set-up using 2 external resistors. With a 300kHz oscillation frequency, the size of the external components can be reduced. Control switches from PWM to PFM during light loads with the XC6368 (PWM/PFM switchable) and the series is highly efficient from light loads to large output currents. Soft start time of XC6367/68A, B, and C series is internally set to 10msec and XC6367/68C, D, and F series regulate soft-start time by connecting resistors and capacitors externally. During stand-by (CE pin "Low"), supply current is reduced to less than 0.5μA.

Features:

• Input Voltage Range : 0.9V ~ 10V
• Operating Voltage Range : 2.0V ~ 10V
• Output voltage Range : 1.5V ~ 6.5V programmable in 100mV steps (±2.5%)
• Oscillation Frequency : 300kHz, 100kHz (±15%)
• Custom products for 180kHz, 500kHz
• Output Current : More than 200mA (VIN=1.8V, VOUT=3.3V)
• High Efficiency : 84% (TYP.)
• Stand-by capability : ISTB=0.5A (MAX.)
• Selection : Soft-start set-up external
• Output voltage set-up internal (VOUT)
• Output voltage set-up external (FB)