
XC9504
Series 
1/53
2 ch. Step-Up / Inverting DC/DC Controller ICs 
GENERAL DESCRIPTION 
The XC9504 series are PWM control, PWM/PFM switching, 2 channel (step-up and inverting) DC/DC controller ICs.   
With 0.9V of standard voltage supply internal, and using externally connected components, the output 1 voltage (step-up 
DC/DC controller) can be set freely within a range of 1.5V ~ 30V.  Since output 2 (inverting DC/DC controller) has a built-in 
0.9V reference voltage (accuracy ±2%), a negative voltage can be set with the external components. 
With a 180kHz frequency, the size of the external components can be reduced.  Oscillation frequencies of 300kHz are also 
available as custom designed products. 
The control of the XC9504 series can be switched between PWM control and PWM/PFM automatic switching control using 
external signals.  Control switches from PWM to PFM during light loads when automatic switching is selected and the series 
is highly efficient from light loads through to large output currents.  Noise is easily reduced with PWM control since the 
frequency is fixed.  
The series gives freedom of control selection so that control suited to the application can be selected.   
Soft-start time is internally set to 10ms (output 1) which offers protection against rush currents and voltage overshoot when 
the power is switched on. 
APPLICATIONS 
Power supplies for LCD 
PDAs 
Palm top computers 
Portable audio systems 
Various multi-function power supplies
FEATURES
2ch. DC/DC Controller (Step-Up + Inverting) 
<Output 1: Step-Up DC/DC Controller> 
Output Voltage Range : 1.5V ~ 30V (set by FB1 pin) 
Output Current 
: More than 20mA 
 (V
IN
=3.3V, V
OUT
=15V) 
Soft-Start Internally Set-Up 
<Output 2: Inverting DC/DC Controller > 
Output Voltage Range : -30V ~ 0V (set by FB2 pin) 
Output Current 
: 
 (V
IN
=3.3V, V
OUT
=-7.0V)
<Common> 
Supply Voltage Range : 2.0V ~ 10.0V 
  Input Voltage Range  : 0.9V ~ 10.0V 
Oscillation Frequency : 180kHz (±15%) 
 *300kHz, 500kHz custom 
Maximum Duty Cycle : 80% (TYP.)   
Control Method       : PWM or PWM/PFM Selectable 
Stand-by Function 
: 3.0
Packages 
: MSOP-10, USP-10 
-20mA 
F(MAX.) 
TYPICAL PERFORMANCE
CHARACTERISTICS 
●
Output Voltage vs. Output Current 
TYPICAL APPLICATION CIRCUIT
XC9504B092A  Input: 3.3V, Output 
: 15V, Output 
: -7V
Green Operation Compatible
ETR0704_001