XC9101 Series

PWM Controlled, Step-Up DC/DC Controller

The XC9101series are step-up multiple current and voltage feedback DC/DC controller ICs. Current sense, clock frequencies and amp feedback gain can all be externally regulated.

A stable power supply is possible with output currents of up to 1.5A and output voltage is selectable in 0.1V steps within a 2.2V - 16.0V (+-2.5% accuracy) range (internal). Further, a type which has a 0.9V internal reference voltage and which allows output voltage to be set-up freely via the external components is also available (FB type).

Switching frequencies can be regulated externally within a range of 100 ~600 kHz and therefore frequencies suited to your particular application are selectable.

Further, the drive transistor's current limit can be applied via the current sense functionand soft-start times can be regulated by the external resistors and capacitors.

During shutdown (CE pin =L), consumption current can be reduced to as little as 0.5μA or less.

Typical Application Circuit


Input Voltage Range 2.5V~20V
Output Voltage Range 2.5V~16V(Fixed Voltage Type),30V+(Adjustable Type)
Oscillation Frequency 100kHz~600kHz
Output Current Up to1.5A
Capacitor Low ESR Ceramic


Package MSOP-8A Number of Pins 8
Pcs/Reel 1,000 Package Size(mm) 4.9 x 3.0 x 1.22


Quality Reports


QuestionWhat is the soft-start function?

The function to soften the rise to prevent the inrush current.

QuestionWhat is the standby current?

The current that flows through the IC in the standby mode. The standby mode means the state where the IC has been turned off by the CE function.