XC9504 Series
ETR0704_002b
2 ch. Step-Up / Inverting DC/DC Controller ICs
☆GreenOperation Compatible
■GENERAL DESCRIPTIO N
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 con nected 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 bet ween PWM control and PWM/PFM automatic switching control usi ng
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
■TYPICAL APPLICATION CIRCUIT
＜XC9504B092A Input: 3.3V, Output ①: 15V, Output ②: -7V＞
■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
Soft-Start Internally Set-Up
<Output 2: Inverting DC/DC Controller >
Output Voltage Range : -30V ~ 0V (set by FB2 pin)
Output Current : ≧-20mA
(V
<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 : 3.0μF(MAX.)
Packages : MSOP-10, USP-10
Environmentally Friendly
IN=3.3V, VOUT=15V)
IN=3.3V, VOUT=-7.0V)
:EU RoHS Compliant, Pb Free
■TYPICAL PERFORMANCE
CHARACTERISTICS
●Output Voltage vs. Output Current
1/53
XC9504 Series
■PIN CONFIGURATION
■PIN ASSIGNMENT
PIN NUMBER PIN NAME FUNCTION
(*1)
(*2)
1 EXT 1
2 VDD
3 FB1
4 PWM1
5 EN1
6 EN2
7 PWM2
8 FB2
9 GND
10 EXT2/
■PRODUCT CLASSIFICATION
●Ordering Information
XC9504 ①②③④⑤⑥-⑦
DESIGNATOR DESCRIPTION SYMBOL DESCRIPTION
①
②③
④
⑤⑥-⑦
The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.
The device orientation is fixed in its embossed tape pocket. For reverse orientation, please contact your local Torex sales office or
representative. (Standard orientation: ⑤R-⑦, Reverse orientation: ⑤L-⑦)
Type of DC/DC Controller B Standard type (10 pi n)
Oscillation Frequency
Channel 1: External Transistor Drive Pin
<Connected to N-ch Power MOSFET Gate>
Supply Voltage
Channel 1: Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage
can be set freely by connecting split resistor between V
Channel 1: PWM/PFM Switching Pin <Control Output 1. PMW control when connected
to V
DD, PWM/PFM auto switching when connected to GND.>
Channel 1: Enable Pin <Connected to GND when Output 1 is in stand-by mode.
Connected to V
DD when Output 1 is active. EXT1 is low when in stand-by mode.>
Channel 2: Enable Pin <Connected to GND when Output 2 is in stand-by mode.
Connected to V
DD when Output 2 is active. EXT1 is high when in stand-by mode.>
Channel 2: PWM/PFM Switching Pin <Control Output 2．PMW control when connected
to V
DD, PWM/PFM auto switching when connected to GND.>
Channel 2: Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage
can be set freely by connecting split resistor between V
Ground
Channel 2: External Transistor Drive Pin <Connected to P-ch Power MOSFET Gate>
(*1)
Output Voltage 09
Packages
Taping Type
(*2)
2/53
USP-10
(BOTTOM VIEW)
OUT1 and GND.>
OUT2 and GND.>
FB productsD②=0, ③=9 fixed
2 180kHz
3 300kHz (custom)
5 500kHz (custom)
AR MSOP-10
AR-G MSOP-10
DR USP-10
DR-G USP-10
←
13mm
→
A
■BLOCK DIAGRAM
■
BSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL RATINGS UNITS
VDD Pin Voltage VDD - 0.3 ~ 12.0 V
FB1, 2 Pin Voltage VFB - 0.3 ~ 12.0 V
EN1, 2 Pin Voltage VEN - 0.3 ~ 12.0 V
PWM1, 2 Pin Voltage VPWM - 0.3 ~ 12.0 V
EXT1, 2 Pin Voltage VEXT - 0.3 ~ VDD + 0.3 V
EXT1, 2 Pin Current IEXT
Power Dissipation
Operating Temperature Range Topr - 40 ~ + 85
Storage Temperature Range Tstg - 55 ~ + 125
MSOP-10 150
USP-10
Pd
±100
150
XC9504
Series
Ta=25℃
mA
mW
℃
℃
3/53
XC9504 Series
■ELECTRICAL CHARACTERISTICS
XC9504B092A Common Characteristics
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
Supply Voltage (*1) VDD 2.0 - 10.0 V -
VDD ≧2.0V IOUT=1mA
Output Voltage Range (*3) VOUTSET
IN ≧0.9V IOUT=1mA
V
Supply Current 1 IDD1 FB=0V, FB2=0.1 - 90 190 μA ③
Supply Current 1-1 IDD1-1
Supply Current 1-2 IDD1-2
Supply Current 2 IDD2 FB1=1.2V, FB2=0V - 70 132 μA ③
Stand-by Current ISTB Same as IDD1, EN1=EN2=0V - 1.0 3.0 μA ③
Oscillation Frequency FOSC Same as IDD1 153 180 207 kHz ③
EN1, 2 "High" Voltage VENH FB1=3.0V, FB2=0V 0.65 - - V ③
EN1, 2 "Low" Voltage VENL FB1=3.0V, FB2=0V - - 0.20 V ③
EN1, 2 "High" Current IENH FB1=3.0V, FB2=0V - - 0.50 μA ③
EN1, 2 "Low" Current IENL EN1, 2=0V, FB1=3.0V, FB2=0V - - -0.50 μA ③
PWM1, 2 "High" Current IPWMH FB1=3.0V, FB2=0V, PWM1, 2=3.0V - - 0.50 μA ③
PWM1, 2 "Low" Current IPWML FB1=3.0V, FB2=0V, PWM1, 2=0V - - -0.50 μA ③
FB1, 2 "High" Current IFBH FB1=3.0V, FB2=0.8V - - 0.50 μA ③
FB1, 2 "Low" Current VFBL FB1=1.0V, FB2=0V - - -0.50 μA ③
Unless otherwise stated, VDD=3.0V, PWM1, 2=3.0V, EN1, 2 = 3.0V
EN1=3.0V, EN2=0V, FB1=0V
EN2=3.0V, EN1=0V, FB2=1.2V
FB1=0V, FB2=0V
FB1=1.2V, FB2=1.2V
(*2)
VOUT1 0.9 - - V
V
OUT2 - - 0.0 V
VOUT1 2.0 - 10.0 V
V
OUT2 - - 0.0 V
Output 1 Characteristics Step-Up Controller
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
FB1 Voltage VFB1 VDD=3.0V, VIN=1.5V, IOUT=10mA 0.882 0.900 0.918 V
Operating Start Voltage 1
Oscillation Start Voltage 1 VST2-1 FB1=0V - - 0.8 V
Maximum Duty Ratio 1 MINDTY1 Same as IDD1 75 80 87 %
Minimum Duty Ratio 1 MAXDTY1 Same as IDD2 --0 %
PFM Duty Ratio 1 PFMDTY1 No Load, VPWM1=0V 22 30 38 %
Efficiency 1 EFFI1 IOUT1= 130mA, N-ch MOSFET: XP161A1355P - 85 - %
Soft-Start Time 1 TSS1
EXT1 "High" ON Resistance
EXT1 "Low" ON Resistance REXTBL1 EN1=FB1=1.2V, EXT1=0.4V - 22 30
PWM1 "High" Voltage VPWMH1 No Load 0.65 - - V
PWM1 "Low" Voltage VPWML1 No Load - - 0.20 V
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
(*2)
VST1-1
REXTBH1 FB1=0V, EXT1=VDD -0.4V - 28 47
Using Tr: 2SD1628,
I
OUT=1.0mA, RFB11=200kΩ, RFB12=75kΩ
DD≠VOUT1 : IOUT1=10mA
V
V
OUT1×0.95V, EN1=0V→0.65V
Output 2 Characteristics Inverting DC/DC Controller
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
FB2 Voltage VFB2 VDD=3.0V 0.882 0.900 0.918 V ③
Operation Start Voltage 2 VST1-2
Oscillating Start Voltage 2 VST2-2 FB2=1.2V - - 2.0 V ③
Maximum Duty Ratio 2 MAXDTY2 Same as IDD1 75 80 87 % ③
Minimum Duty Ratio 2 MINDTY2 Same as IDD2 - - 0 % ③
PFM Duty Ratio 2 PFMDTY2 No Load, VPWM2=0V 22 30 38 % ⑦
Efficiency 2 EFFI2 IOUT2=-150mA, P-ch MOSFET: XP162A12A6P - 76 - % ⑦
EXT2 "High" ON Resistance REXTBH2 EN2=FB2= 0V, EXT2=VDD-0.4V - 28 47 Ω ⑥
EXT2 "Low" ON Resistance REXTBL2 FB2=3.0V, EXT2=0.4V - 22 30 Ω ⑥
PWM2 "High" Voltage VPWMH2 No Load 0.65 - - V ⑦
PWM2 "Low" Voltage VPWML2 No Load - - 0.20 V ⑦
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=3.0V
IOUT=1.0mA, RFB11=200kΩ, RFB12=75kΩ
R
FB21=17.5kΩ, RFB22=10kΩ,
EN1=P
WM1=3.0V
(FOSC = 180kHz)
- 60 120 μA ③
- 80 150 μA ③
(FOSC = 180kHz)
- - 0.9 V
- - 2.0 V
5.0 10.0 20.0 ms
(FOSC = 180kHz)
- - 2.0 V ①②
4/53
Ta=25℃
Ta=25℃
Ω ⑥
Ω ⑥
Ta=25℃
①
②
④
②
①
③
③
③
⑤
⑤
⑤
⑤
⑤
■ELECTRICAL CHARACTERISTICS (Continued)
XC9504B093A Common Characteristics
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
Supply Voltage
Output Voltage Range
Supply Current 1 IDD1 FB=0V, FB2=1.2V - 110 250 μA ③
Supply Current 1-1 IDD1-1
Supply Current 1-2 IDD1-2
Supply Current 2 IDD2 FB1=1.2V, FB2=0V - 80 160 μA ③
Stand-by Current ISTB Same as IDD1, EN1=EN2=0V - 1.0 3.0 μA ③
Oscillation Frequency FOSC Same as IDD1 255 300 345 kHz ③
EN1, 2 "High" Voltage VENH FB1=0V, FB2=3.0V 0.65 - - V ③
EN1, 2 "Low" Voltage VENL FB1=0V, FB2=3.0V - - 0.20 V ③
EN1, 2 "High" Current IENH FB1=3.0V, FB2=0V - - 0.50 μA ③
EN1, 2 "Low" Current IENL EN1, 2=0V, FB1=3.0V, FB2=0V - - -0.50 μA ③
PWM1, 2 "High" Current IPWMH FB1=3.0V, FB2=0V, PWM1, 2=3.0V - - 0.50 μA ③
PWM1, 2 "Low" Current IPWML FB1=3.0V, FB2=0V, PWM1, 2=0V - - -0.50 μA ③
FB1, 2 "High" Current IFBH FB1=3.0V, FB2=0.8V - - 0.50 μA ③
FB1, 2 "Low" Current VFBL FB1=1.0V, FB2=0V - - -0.50 μA ③
Unless otherwise stated, VDD=3.0V, PWM1, 2=3.0V, EN1, 2 = 3.0V
(*1)
VDD 2.0 - 10.0 V -
VDD ≧2.0V, IOUT=1mA VOUT1 0.9 - -
(*3)
VOUTSET
VDD ≠VOUT VOUT2 - - 0.0
VIN ≧0.9V, IOUT=1mA
V
DD=VOUT VOUT2 - - 0.0
EN1=3.0V, EN2=0, FB1=0V
EN2=3.0V, EN1=0V, FB2=1.2V
FB1=0V, FB2=0V
FB1=1.2V, FB2=1.2V
(*2)
VOUT1 2.0 - 10.0
Output 1 Characteristics Step-Up Controller
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
FB 1 Voltage VFB1 VDD=3.0V, VIN=1.5V, IOUT1=10mA 0.882 0.900 0.918 V ④
Operating Start Voltage 1
Oscillation Start Voltage 1 VST2-1 FB1=0V - - 0.8 V ③
Maximum Duty Ratio 1 MINDTY1 Same as IDD1 75 80 87 % ③
Minimum Duty Ratio 1 MAXDTY2 Same as IDD2 - - 0 % ③
PFM Duty Ratio 1 PFMDTY1 No Load, VPWM1=0V 22 30 38 % ⑤
Efficiency 1 EFFI1 IOUT1= 130mA, N-ch MOSFET: XP161A1355P - 85 - % ⑤
Soft-Start Time 1 TSS1 VOUT1×0.95V, EN1=0V→0.65V 5.0 10.0 20.0 ms ⑤
EXT1 "High" ON Resistance REXTBH1 FB1=0V, EXT1=VDD -0.4V - 28 47 Ω ⑥
EXT1 "Low" ON Resistance REXTBL1 EN1=FB1=1.2V, EXT1=0.4V - 22 30 Ω ⑥
PWM1 "High" Voltage VPWMH1 No Load 0.65 - - V ⑤
PWM1 "Low" Voltage VPWML1 No Load - - 0.20 V ⑤
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
(*2)
VST1-1
Using Tr: 2SD1628,
I
OUT=1.0mA, RFB11=200kΩ, RFB12=75kΩ
V
DD ≠VOUT1 : IOUT1=10mA - - 2.0 V ①
Output 2 Characteristics Inverting DC/DC Controller
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
FB 2 Voltage VFB2 VDD=3.0V 0.882 0.900 0.918 V ③
Operating Start Voltage 2 VST1-2
Oscillation Start Voltage 2 VST2-2 FB2=1.2V - - 2.0 V ③
Maximum Duty Ratio 2 MAXDTY2 Same as IDD1 75 80 87 % ③
Minimum Duty Ratio 2 MINDTY3 Same as IDD2 - - 0 % ③
PFM Duty Ratio 2 PFMDTY2 No Load, VPWM2=0V 22 30 38 % ⑦
Efficiency 2 (*4) EFFI2 IOUT2= -150mA, P-ch MOSFET: XP162A12A6P - 75 - % ⑦
EXT2 "High" ON Resistance REXTBH2 EN2=FB2= 0V, EXT2=VDD-0.4V - 28 47 Ω ⑥
EXT2 "Low" ON Resistance REXTBL2 FB2=3.0V, EXT2=0.4V - 22 30 Ω ⑥
PWM2 "High" Voltage VPWMH2 No Load 0.65 - - V ⑦
PWM2 "Low" Voltage VPWML2 No Load - - 0.20 V ⑦
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=3.0V
IOUT2=1.0mA, RFB11=200kΩ, RFB12=75kΩ
FB21=17.5kΩ,RFB22=10k, EN1=PWM1=3.0V
R
(FOSC = 300kHz)
V ①
V ②
- 80 150 μA ③
- 90 200 μA ③
(FOSC = 300kHz)
- - 0.9 V ②
(FOSC = 300kHz)
- - 2.0 V ①②
XC9504
Series
Ta=25℃
Ta=25℃
Ta=25℃
CIRCUIT
5/53
XC9504 Series
■ELECTRICAL CHARACTERISTICS (Continued)
XC9504B095A Common Characteristics
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
Supply Voltage (*1) VDD 2.0 - 10.0 V -
VDD≧2.0V, IOUT=1mA VOUT1 0.9 - -
Output Voltage Range (*3) VOUTSET
Supply Current 1 IDD1 FB=0V, FB2=1.2V - 165 350 μA ③
Supply Current 1-1 IDD1-1
Supply Current 1-2 IDD1-2
Supply Current 2 IDD2 FB1=1.2V, FB2=0V - 100 200 μA ③
Stand-by Current ISTB Same as IDD1, EN1=EN2=0V - 1.0 3.0 μA ③
Oscillation Frequency FOSC Same as IDD1 425 500 575 kHz ③
EN1, 2 "High" Voltage VENH FB1=0V, FB2=3.0V 0.65 - - V ③
EN1, 2 "Low" Voltage VENL FB1=0V, FB2=3.0V - - 0.20 V ③
EN1, 2 "High" Current IENH FB1=3.0V, FB2=0V - - 0.50 μA ③
EN1, 2 "Low" Current IENL EN1, 2=0V, FB1=3.0V, FB2=0V - - -0.50 μA ③
PWM1, 2 "High" Current IPWMH FB1=3.0V, FB2=0V, PWM1, 2=3.0V - - 0.50 μA ③
PWM1, 2 "Low" Current IPWML FB1=3.0V, FB2=0V, PWM1, 2=0V - - -0.50 μA ③
FB1, 2 "High" Current IFBH FB1=3.0V, FB2=0.8V - - 0.50 μA ③
FB1, 2 "Low" Current VFBL FB1=1.0V, FB2=0V - - -0.50 μA ③
Unless otherwise stated, VDD=3.0V, PWM1, 2=3.0V, EN1, 2 = 3.0V
VDD≠VOUT VOUT2 - - 0.0
VIN≧0.9V, IOUT=1mA (note 2) VOUT1 2.0 - 10.0
V
DD=VOUT VOUT2 - - 0.0
EN1=3.0V, EN2=0, FB1=0V
EN2=3.0V, EN1=0V, FB2=1.2V
FB1=0V, FB2=0V
FB1=1.2V, FB2=1.2V
Output 1 Characteristics Step-Up Controller
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUIT
FB 1 Voltage VFB1 VDD=3.0V, VIN=1.5V, IOUT1=10mA 0.882 0.900 0.918 V ④
Operating Start Voltage 1
Oscillation Start Voltage 1 VST2-1 FB1=0V - - 0.8 V ③
Maximum Duty Ratio 1 MINDTY1 Same as IDD1 75 80 87 % ③
Minimum Duty Ratio 1 MAXDTY2 Same as IDD2 - - 0 % ③
PFM Duty Ratio 1 PFMDTY1 No Load, VPWM1=0V 22 30 38 % ⑤
Efficiency 1 EFFI1 IOUT1= 130mA, N-ch MOSFET: XP161A1355P - 83 - % ⑤
Soft-Start Time 1 TSS1 VOUT1×0.95V, EN1=0V→0.65V 5.0 10.0 20.0 ms ⑤
EXT1 "High" ON Resistance REXTBH1 FB1=0V, EXT1=VDD -0.4V - 28 47 Ω ⑥
EXT1 "Low" ON Resistance REXTBL1 EN1=FB1=1.2V, EXT1=0.4V - 22 30 Ω ⑥
PWM1 "High" Voltage VPWMH1 No Load 0.65 - - V ⑤
PWM1 "Low" Voltage VPWML1 No Load - - 0.20 V ⑤
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
(*2)
VST1-1
Using Tr: 2SD1628,
IOUT=1.0mA, RFB11=200kΩ, RFB12=75kΩ
V
DD ≠VOUT1 : IOUT1=10mA - - 2.0 V ①
(FOSC = 500kHz)
V ①
V ②
- 110 220 μA ③
- 130 270 μA ③
(FOSC = 500kHz)
- - 0.9 V ②
Ta=25℃
Ta=25℃
Output 2 Characteristics Inverting DC/DC Controller Ta=25℃
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
FB 2 Voltage VFB2 VDD=3.0V 0.882 0.900 0.918 V ③
Operating Start Voltage 2 VST1-2
Oscillation Start Voltage 2 VST2-2 FB2=1.2V - - 2.0 V ③
Maximum Duty Ratio 2 MAXDTY2 Same as IDD1 75 80 87 % ③
Minimum Duty Ratio 2 MINDTY2 Same as IDD2 - - 0 % ③
PFM Duty Ratio 2 PFMDTY2 No Load, VPWM2=0V 22 30 38 % ⑦
Efficiency 2
EXT2 "High" ON Resistance REXTBH2 EN2=FB2= 0V, EXT2=VDD-0.4V - 28 47 Ω ⑥
EXT2 "Low" ON Resistance REXTBL2 FB2=3.0V, EXT2=0.4V - 22 30 Ω ⑥
PWM2 "High" Voltage VPWMH2 No Load 0.65 - - V ⑦
PWM2 "Low" Voltage VPWML2 No Load - - 0.20 V ⑦
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=3.0V
(*4)
EFFI2 IOUT2= -150mA, P-ch MOSFET: XP162A12A6P - 71 - % ⑦
IOUT2=1.0mA, RFB11=200kΩ, RFB12=75kΩ
R
FB21=17.5kΩ, RFB22=10kΩ,
EN1=PWM1=3.0V
(FOSC = 500kHz)
TEST CIRCUIT
- - 2.0 V ①②
6/53
XC9504
Series
■ELECTRICAL CHARACTERISTICS (Continued)
NOTE:
*1 Although the IC's step-up switching operations start from a V
stabilized at V
power sources.
*2 Although the IC's operations start from a VIN of 0.9V, the IC's power supply pin (VDD) and output voltage monitor pin (FB1)
should be connected to V
Once output voltage V
*3 Please be careful not to exceed the breakdown voltage level of the peripheral parts.
*4 EFFI={ [ (output voltage) x (output current) ] / [ (input voltage) x (input current) ] } x 100
DD ≧2.0V. Therefore, a VDD of more than 2.0V is recommended when VDD is supplied from VIN or other
OUT1. With operations from VIN=0.9V, the 2nd channel's (output 2) EN2 pin should be disabled.
OUT1 is more than 2.0V, the EN2 pin should be enabled.
DD of 0.8V, the output voltage and oscillation frequency are
7/53
XC9504 Series
■OPERATIONAL EXPLANATION
The XC9504 series are dual DC/DC (step-up + inverting) converter controller ICs with built-in high speed, low ON resistance
buffers.
<Error Amp. 1>
Error amplifier 1 is designed to monitor the output voltage and it compares the feedback voltage1 (FB1) with the reference
voltage Vref1. In response to feedback of a voltage lower than the reference voltage Vref1, the output voltage of the error
amp. decreases
<Error Amp. 2>
Error amplifier 2 is designed to monitor the output voltage and it compares the feedback voltage 2 (FB2) with the r eference
voltage Vref 2. In response to feedback of a voltage lower than the reference voltage Vref2, the output voltage of the error
amp. decreases.
<OSC Generator>
This circuit generates the internal reference clock.
<Ramp Wave Generator 1, 2>
The ramp wave generator generates a saw-tooth waveform based on outputs from the OSC generator.
<PWM Comparator 1, 2>
The PWM comparator compares outputs from the error amp. and saw-tooth waveform. When the voltage from the error
amp's output is low, the external will be set to ON.
<PWM/PFM Controller 1, 2>
This circuit generates PFM pulses.
Control can be switched between PWM control and PWM/PFM automatic switching control using extern al signals.
The PWM/PFM automatic switching mode is selected when the voltage of the PWM1 (2) pin is less than 0.2V, and the control
switches between PWM and PFM automatically depending on the load. As the PFM circuit generates pulses based on
outputs from the PWM comparator, shifting between modes occurs smoothly. PWM control mode is selected when the
voltage of the PWM1 (2) pin is more than 0.65V. Noise is easily reduced with PWM control since the oscillation frequency is
fixed. Control suited to the application can easily be selected which is useful in audio applications, for example, where
traditionally, efficiencies have been sacrificed during stand-by as a result of using PWM control (due to the noise probl ems
associated with the PFM mode in stand-by).
<Vref 1 with Soft Start 1>
The reference voltage, Vref1 (FB1 pin voltage)=0.9V, is adjusted and fixed b y laser trimming (for output voltage settings,
please refer to the functional settings notes below.). To protect against inr ush current, when the power is switched on, and
also to protect against voltage overshoot, soft-start time is set internally to 10ms. It should be noted, however, that this
circuit does not protect the load capacitor (C
input to error amp 1, the operation maintains a balance between the two inputs of error amps and controls the EXT pin's ON
time so that it doesn't increase more than is necessary.
<Vref 2>
The reference voltage, Vref2 (FB2 pin voltage)=0.9V, is adj usted and fixed by laser trimming.
<Enable Function 1,2>
This function controls the operation and shutdown of the IC. When the voltage of the EN1 or EN 2 pins is 0.2V or less, th e
mode will be disable, the channel's operations will stop and the EXT1 pin will be kept at a low level (the external N-ch
MOSFET will be OFF) and the EXT2 pin will be kept at a high level (the external P-ch MOSFET will be OFF). When both EN1
and EN2 are in a state of chip disable, current consumption will be no more than 3.0μA.
When the EN1 or EN2 pin's voltage is 0.65V or more, the mode will be enable and operations will recommence. With
channel one (output 1) soft-start, 95% of the set output voltage will be reached within 10msec (TYP.) from the moment of
enable.
8/53
L) from inrush current. With the Vref voltage limited, and depending upon the
R
R
2
V
(
XC9504
■OPERATIONAL EXPLANATION (Continued)
< Output Voltage Setting, Ch.1 (Step-Up DC/DC Converter Controller) >
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based
on the values of R
The speed-up capacitor for phase compensation's (CFB1) value should be adjusted using the formula fzfb=1/(2
×
RFB11) so that it equals 12kHz. Depending on the application, the inductance value L, and the load capacity value CL,
adjustments to this value are suggested so that the value is somewhere between 1kHz to 50kHz.
[Calculation Example]
When
[Typical Example]
< Output
Output voltage can be set by adding reference voltage and split resistors externally. Output voltage is determined using the
following equation and is based on the values of R
or less. The equation uses Ch 1's (V
[Calculation Example]
When R
The value of speed-up capacitor for phase compensation CFB21:
[Conditions: Heavy load (when coil current is continuous.)]
fzfb2 = 1/2
Depending on the application, the inductance value L, and the load capacity value C
suggested so that the value is somewhere between 1kHz to 50kHz.
[Conditions: Light load (when coil current is discontinuous.)]
Less than C
Depending on the application, the inductance value L, and the load capacity value C
> Example Circuit 1: Using voltage of Ch 1 (Step-Up)
> Example Circuit 2: Using a positive regulator
FB11 = 470k
VOUT
(V)
1.5 220 330 62 2.7 360 180 33 10.0 680 68 18
1.8 220 220 62 3.0 560 240 24 12.0 160 13 82
2.0 330 330 39 3.3 200 75 62 15.0 470 30 27
2.2 390 390 33 5.0 82 18 160 20.0 470 22 27
2.5 390 390 33 8.0 120 15 100 30.0 390 12 34
Voltage Setting, Ch. 2 (Inverting DC/DC Converter) >
FB21 =17.5k
Inside of XC9504 IC
Inside of
XC9504 IC
FB11 and RFB12. The sum of RFB11 and RFB12 should normally be 1 MΩ or less.
VOUT1=0.9×(RFB11+RFB12)/RFB12
Ω
and
FB1
RFB11
(kΩ)
RFB12
(kΩ)
= 30kΩ :
CFB1
(pF)
OUT1) output voltage calculation method for the reference voltage.
OUT1 = 0.9
VOUT
(V)
×
470k+30k) / 30k = 15.0V.
RFB11
(kΩ)
FB21 and RFB22. The sum of RFB21 and RFB22 should normally be 200kΩ
RFB12
(kΩ)
CFB1
(pF)
VOUT2 = (0.9-VOUT1) × (RFB21/RFB22) + 0.9V
Ω
, RFB22 =10kΩ, VOUT1 =3.3V, VOUT2 = - 3.3V
×π×
CFB21×RFB21) = 10kHz
FB21=0.1μF
L, adjustments to this value are suggeste d.
VOUT1
Channel 1 (Step-Up) circuits should be enable by setting EN1 to
High level so that a stable voltage is provided. Inrush current to the
inverter when the supply voltage V
be controlled by setting EN 1 and EN 2 to enable (“H” level)
simultaneously.
A stable positive voltage produced by a positive voltage regulator or
by other means is usable.
OUT2 = (0.9 - VROUT) x (RFB21 / RFB22) + 0.9V
V
FB2
FB2
SBD2
RFB22
CL2
RFB21
VR_OUT
VR
CL2
RFB21
VOUT2
To the other
circuit
RFB22
CFB21
CFB21
×π×
VOUT
(V)
DD of the IC is 2.0 V or higher can
RFB11
(kΩ)
L, adjustments to this value are
RFB12
(kΩ)
CFB1
Series
CFB1
(pF)
SBD2
VOUT2
9/53
XC9504 Series
■NOTES ON USE
●External Components
Conditions: Light load (when coil current is discontinuous.)
Channel One: Step-Up DC/DC Converter Controller ICs Channel Two: Inverter DC/DC Converter
* MOSFET * MOSFET
Tr.1: XP151A12A2 (N-ch Power MOSFET, TOREX) Tr.2: XP151A12C0 (P-ch Power MOSFET, TOREX)
Note: V
GS break down voltage of the XP151A12A2
is 12V so please be careful with the power supply
voltage.
SD1: MA2Q737 (Schottky diode, MATSUSHITA) SD2: MA2Q737 (Schottky diode, MATSUSHITA)
L1:
15μH
22μH
(D412F, TOKO, FOSC=300kHz) L2:
(D412F, TOKO, FOSC=180kHz)
Please set so that the coil current is discontinuous. Please set so that the coil current is discontinuous.
CL1:
25V, 4.7μF
(Ceramic) CL2:
* NPN Tr. * PNP Tr.
Tr.1: 2SD1628 (SANYO) Tr.2: 2SA1213 (TOSHIBA)
RB1:
500Ω
Adjust in accordance with load &
Tr.’s hFE.
B1<(VIN - 0.7) x (hFE/IC - REXTBH)
R
CB1: 2200pF (Ceramic) CB2: 2200pF (Ceramic)
CB1< (2 π x RB1 x FOSC x 0.7)
Conditions: Light load (when coil current is discontinuous.)
Channel One: Step-Up DC/DC Converter Controller ICs Channel Two: Inverter DC/DC Converter
* MOSFET * MOSFET
Tr.1: XP151A12A2 (N-ch Power MOSFET, TOREX) Tr.2: XP151A12C0 (P-ch Power MOSFET, TOREX)
Note: V
GS break down voltage of the XP151A12A2
is 12V so please be careful with the power supply
voltage.
SD1: MA2Q737 (Schottky diode, MATSUSHITA) SD2: MA2Q737 (Schottky diode, MATSUSHITA)
CRS02,
L1:
15μH
(CDRH5D28, SUMIDA,
FOSC=300kHz)
22μH
(CDRH5D28, SUMIDA,
FOSC=180kHz)
CL1:
16V, 4.7μF
Increase capacity according to the equation below
(Tantalum) CL2:
when the step-up voltage ratio is large and output
current is high.
CL=(CL standard value) x (IOUT1 (mA) / 300mA x
V
OUT1 / VIN
* NPN Tr. * PNP Tr.
Tr.1:
2SD1628 (SANYO)
RB1: 500Ω Adjust in accordance with load &
Tr.’s hFE.
CB1:
RB1<(VIN - 0.7) x (hFE/IC - REXTBH)
C
B1< (2 π x RB1 x FOSC x 0.7)
Note: V
GS break down voltage of the XP151A12C0 is
12V so please be careful with the power supply
voltage.
(D412F, TOKO, FOSC=300kHz)
(D412F, TOKO, FOSC=180kHz)
(Ceramic)
Adjust in accordance with load &
RB2:
22μH
44μH
10V, 4.7μF
500Ω
Tr.’s hFE.
RB2<(VIN - 0.7) x (hFE/IC - REXTBL)
CB2< (2 π x RB2 x FOSC x 0.7)
Note: V
GS break down voltage of the XP151A12C0 is
12V so please be careful with the power supply
voltage.
(Schottky diode, TOSHIBA)
CMS02
L2:
15μH
(CDRH5D28, SUMIDA,
FOSC=300kHz)
22μH
(CDRH5D28, SUMIDA,
FOSC=180kHz)
16V, 4.7μF
(Tantalum)
Increase capacity according to the equation below
when the step-up voltage ratio is large and output
current is high.
C
L=(CL standard value) x (IOUT2 (mA) / 300mA x
V
OUT2 / VIN
Tr.2: 2SA1213 (TOSHIBA)
RB2: 500Ω Adjust in accordance with load &
Tr.’s hFE.
C
B2: 2200pF (Ceramic)
B2<(VIN - 0.7) x (hFE/IC - REXTBL)
R
B2< (2 π x RB2 x FOSC x 0.7)
C
10/53
■NOTES ON USE (Continued)
●Hint on application
1. Channel 1 (Step-Up) How to shut down the output voltage during standby mode
If the circuit configuration shown as an example of typical application circuits is used, voltage V
the IC is in standby, the diode being bypassed. This can cause circuits connected to V
> Example of typical application circuit 1:
VOUT1
RFB11
CL1
RFB12
Pch
MOSFET1
CFB1
MOSFET2
Nch
ON/OFF
signal
SBD1
R1
Inside of
XC9504 IC
FB1
EN1
Set R1 so as to prevent leakage current of N-ch MOSFET 2.
IN will occur at VOUT1 when
OUT1 to malfunction.
> Example of typical application circuit 2: Power Ready Function
MOSFET1
NPN
Bip1
Pch
R1
RFB11
R2
C1
Nch
MOSFET2
ON/OFF
signal
CL1
RFB12
VOUT1
Time to make power ready is calculated by the equation below.
Time = - R2 x C1 x Ln (1 - 0.7 / [ON / OFF Signal Voltage ]
Set R1 so as to prevent leakage current of NPN (Bip 1).
N-ch MOSFET 2 and the inverter enables power to be turned off quickly.
CFB1
SBD1
Inside of
XC9504 IC
FB1
EN1
The combination of R 2, C 1, and the threshold
voltage of approximately 0.7 V of NPN Bip 1 is
used to produce a delay time between the
circuits being enabled and P-ch MOSFET 1
being switched on. Delay time set to 20ms
ensures power to be made ready in a favorable
manner, as soft start of this product is
completed during the delay time.
Set Value (Example)
VOLTAGE (V)
R2 (kΩ)
C1 (μF)
2.5 430
3.3 470
5.0 430
2. Channel 2 (Inverting): Soft start circuit
Channel 2 (inverting) is subject to the overshoot of output voltage 2 (VOUT2) at start-up. It is possible to control the
overshoot of output voltage 2 (V
“Function Settings.” In this circuit configuration, EN 1 and EN 2 are enabled (set to “H” level) simultaneously. T his lets
output voltage 1 (V
> Example of typical application circuit: Improved Soft start
This example is effective when EN 1 and EN 2 are enabled with different timings under light load condition (the coil current
being discontinuous).
Inside of
XC9504 IC
VOUT1
OUT1) of channel 1 increase gently as soft start, thereby controlling the overshoot.
Pch
MOSFET1
R1
FB2
EN2
SBD2
Nch
MOSFET2
ON/OFF
signal
3. Channel 2 (Inverting): Withstand voltage of transistor
The voltage applied between the drain and source is the sum of V
rating that is suitable for your operating conditions. Example: The voltage applied across V
VIN = 5.0 V and VOUT2 = -15.0 V. Under this condition, a transistor with VDSS higher than 20.0V should be selected. (Use
a transistor with V
DSS that is 1.5 times the applied voltage or more, as a standard.)
OUT2), as shown by circuit example 1 in “Output Voltage Settings for Channel 2” in
Time to make soft start time is calculated by the equation below.
RFB22
ss2 = -RFB21
Time
×
CFB21 / Ln 1 –
(0.9-VOUT2)×RFB22)
OUT1 – 0.9)
(V
×
RFB21)
Example)
OUT1 = 15V and VOUT2 = - 7.5V,
FB21 = 59.6kΩ, RFB22 = 100kΩ by the equation below.
OUT2 = (0.9 - VOUT1) x (RFB21 / RFB22) + 0.9
FB21=0.027μF,
OUT2 = 95% of setting value
IN and VOUT2. Select a transistor with an absolute VDSS
DS of a transistor will be 20.0V if
CL2
RFB21
VOUT2
CFB21
When V
R
V
When the light load, CFB21=0.1μF or lower value can be used.
Therefore, when C
Time_ss2 = 5.0ms and V
XC9504
Series
0.15
0.18
0.33
11/53
XC9504 Series
■TEST CIRCUITS
12/53
■TEST CIRCUITS(Continued)
XC9504
Series
13/53
XC9504 Series
■EXTERNAL COMPONENTS USED FOR THE TEST CIRCUITS
Circuit 1, Circuit 2
Circuit 4
■NOTE ON USE
1. PWM/PFM Automatic Switching
2. Ratings
N-ch MOSFET : XP161A1355P (TOREX)
Circuit 5
N-ch MOSFET : XP161A1355P (TOREX)
Circuit 7
P-ch MOSFET : XP162A12A6P (TOREX)
If PWM/PFM automatic switching control is selected and the step-up ratio is low (e.g., from 4.5 V to 5.0 V), the control
mode remains in PFM setting over the whole load range, since the duty ratio under co ntinuous-duty condition is smaller
than the PFM duty ratio of the XC9504 series. The output voltage's ripple voltage becomes substantially high under
heavy load conditions, with the XC9504 series appe aring to be producing an abnormal oscillation. If this operation
becomes a concern, set pins PWM to High to set the control mode to PWM setting. For use under the
above-mentioned condition, measured data of PWM/PFM automatic switching control shown on the data sheets are
available up to I
Use the XC9504 series and peripheral components within the limits of their ratings.
14/53
L1, L2: 22μH (CDRH5D28, SUMIDA) : XC9504B092A
15μH (CDRH5D28, SUMIDA) : XC9504B093A
10μH (CDRH5D28, SUMIDA) : XC9504B095A
SD1, SD2 : CRS02 (Schottky, TOSHIBA)
EC10QS06 (Schottky, NIHON INTER)
L1, CL2 : 16MCE476MD2 (Tantalum, NIHON CHEMICON)
C
35MCE335MB x 3 (Tantalum, NIHON CHEMICON)
IN : 16MCE476MD2
C
NPN Tr 1 : 2SD1628 (SANYO)
PNP Tr 2 : 2SA1213 (TOSHIBA)
FB : Please use by the conditions as below.
R
RFB11 + RFB12≦1MΩ
RFB21 + RFB22≦1MΩ
RFB11 / RFB12 = (Setting Output Voltage / 0.9) - 1
OUT2 = (0.9 - VOUT1) / (RFB21 / RFB22) + 0.9
V
C
FB : fzfb = 1 /(2
fzfb = 1 /(2
×π×
CFB1×RFB11) = 1kHz to 50kHz (12kHz usual)
×π×
CFB2×RFB21) = 1kHz to 50kHz (12kHz usual).
L1 : 22μH (CDRH5D28 SUMIDA)
SD 1 : MA2Q737 (Schottky, MATSUSHITA)
L 1 : 16MCE476MD2 (Tantalum, NIHONCHEMICON)
C
CIN : 16MCE476MD2 (Tantalum, NIHONCHEMICON)
L1 : 22μH (CDRH5D28, SUMIDA) : XC9504B092A
15μH (CDRH5D28, SUMIDA) : XC9504B093A
10μH (CDRH5D28, SUMIDA) : XC9504B095A
SD 1 : MA2Q737 (Schottky, MATSUSHITA)
L 1 : 16MCE476MD2 (Tantalum, NIHONCHEMICON)
C
CIN : 16MCE476MD2 (Tantalum, NIHONCHEMICON)
L2 : 22μH (CDRH5D28, SUMIDA) : XC9504B092A
15μH (CDRH5D28, SUMIDA) : XC9504B093A
10μH (CDRH5D28, SUMIDA) : XC9504B095A
SD 2 : MA2Q737 (Schottky, MATSUSHITA)
L 2 : 16MCE476MD2 (Tantalum, NIHONCHEMICON)
C
C
IN : 16MCE476MD2 (Tantalum, NIHONCHEMICON)
OUT = 100 mA.
■TYPICAL PERFORMANCE CHARACTERISTICS
< 1 ch. Step-Up DC/DC Controller >
(1) Output Voltage vs. Output Current (Ceramic capacitor and compact Inductor use )
XC9504
Series
15/53
XC9504 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
< 1 ch. Step-Up DC/DC Controller > (Continued)
(1) Output Voltage vs. Output Current (Continued)
)
V
(
Output Voltage1 V OUT1
)
V
(
Output Voltage1 VOUT1
)
V
(
Output Voltage1 VOUT1
16/53
FOSC=180kHz, VO UT1= 10. 0V
L1=100μH(CDRH4D18C), CL1=10μF(ceramic)
10.4
PWM/PFM S witch i ng Control
PWM Control
10.2
10.0
9.8
9.6
9.4
0.1 1 10 100
Output Current 1 IO UT1 (mA)
SD1: C R S02, Tr1:XP151A12A2MR
5.0V
4.2V
VIN=2.7V
3.3V
FOSC=180kHz, VO UT1= 10. 0V
L1=22μH(CDRH4D18C), CL1=10μF(ceramic)
10.4
PWM/PFM S witch i ng Control
PWM Control
10.2
10.0
9.8
9.6
9.4
0.1 1 10 100 1000
Output Current 1 IOUT1 (mA)
SD1: C RS 02, Tr1:XP151A12A2MR
VIN=2.7V 3.3V
4.2V
5.0V
FOSC=180kHz, V OUT1= 20.0V
L1=22μH(CDRH4D18C), CL1=4.4μF(ceramic)
21.0
PWM/PFM Switching Control
PWM Control
20.5
20.0
19.5
19.0
18.5
0.1 1 10 100
Output Current 1 IOUT1 (mA)
SD1: C R S02, Tr1:XP151A11B0MR
VIN=3.3V
5.0V
(Ceramic capacitor use)
FOSC=180kHz, VO UT1= 15. 0V
L1=68μH(CDRH4D18C), CL1=10μF(ceramic)
15.4
)
V
(
Output Voltage1 VOUT1
PWM/PFM S witch i ng Control
PWM Control
15.2
15.0
14.8
14.6
14.4
0.1 1 10 100
Output Current 1 IOUT1 (mA)
FOSC=180kHz, VO UT1= 15. 0V
L1=22μH(CDRH4D18C), CL1=10μF(ceramic)
15.4
PWM/PFM Switching Control
PWM Control
15.2
)
V
(
15.0
14.8
14.6
Output Voltage1 V OUT1
14.4
0.1 1 10 100
Output Current 1 IOUT1 (mA)
FOSC=180kHz, V OUT1= 30.0V
L1=22μH(CDRH4D18C), CL1=2μF(ceramic)
31.0
PWM/PFM S witch i ng Control
)
30.5
V
(
30.0
29.5
29.0
Output Voltage1 VOUT1
28.5
PWM Control
0.1 1 10 100
Output Current 1 IOUT1 (mA)
SD1:C R S02, Tr1:XP151A12A2MR
VIN=2.7V
SD1:C R S02, Tr1:XP151A12A2MR
VIN=2.7V
SD1: C R S02, Tr1:2SK2857
VIN=3.3V 5.0V
4.2V 5.0V
3.3V
4.2V 5.0V
3.3V
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