XC9119 Series

1MHz, PWM Controlled, Step-Up DC/DC Converter, Ceramic Capacitor Compatible

The XC9119D01A series is 1MHz, PWM controlled step-up DC/DC converter, designed to allow the use of ceramic capacitors. With a built-in 2.0Ω switching transistor, the XC9119D01A series can easily provide a step-up operation by using only a coil, a diode, a capacitor, and a resistor, connected externally.

Since output voltage up to 19.5V (Maximum Lx operating voltage: 20V) can be derived with reference voltage supply of 1.0V (±2.0%) and external components, the series can easily supply high voltage for various general-purpose power supplies, LCD panels and organic EL displays.

With a high switching frequency of 1.0MHz, a low profile and small board area solution can be achieved using a chip coil and an ultra small ceramic output capacitor.

With the current limit function (400mA (TYP.):VDD=3.6V), a peak current, which flows through built-in driver transistors can be limited.

Soft-start time can be adjusted by external resistors and capacitors. The stand-by function enables the output to be turned off (CE ’L’), that is, the quiescent current will be less than 1.0μA.

Typical Application Circuit


High Efficiency 86%(VOUT=15V,VDD=3.6V,IOUT=10mA)
Stand-by Current ISTB=1.0mA(MAX.)
Load Capacitors Low ESR capacitors compatible
Current Limit 400mA(VDD=3.6V)
Control PWMControl
Operating Voltage Range 2.5V~6.0V
Output Voltage Range Up to 19.5V externally set-up
Reference voltage1.0V+2.0%
Oscillation Frequency 1.0MHz±20%
On Resistance 2.0W(VDD=3.6V,VDS=0.4V)



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.

QuestionWhat does the FB product mean?

An IC for which any output voltage can be set by the reference voltage of the FB pins and the external dividing resistor. The output voltage is determined by the RFB1 and RFB2 values, using the following formula: VOUT = Vref × (RFB1 + RFB2)/RFB2