XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
Mar, 14 2003 Ver. 2
! Applications
# PDAs
# Palm Top Computers
# Portable Audio Systems
# Various Multi-Function Power Supplies
" 2ch DC/DC Controller (Step-up + Step-down)
" Input Voltage Range 0.9V ~ 10.0V
" Output Voltage Externally Set-Up
" Switching Frequency 180kHz (±15%)
" Maximum Duty Cycle
Step-up
80% (Typ.)
Step-down 100%
" PWM, PWM/PFM Switching Control
" High Efficiency
Step-up
85% (Typ.)
Step-down 92% (Typ.)
" Small MSOP-10 package
! Features
2ch DC/DC Controller
Output 1 : Step-up DC/DC Controller
Output 2 : Step-down DC/DC Controller
Power Supply Voltage Range : 2.0V ~ 10V
Output Voltage Range
Output 1 (Step-up) : 1.5V ~ 30.0V
Can be set freely with 0.9V
(±2.0%) of reference voltage supply
and external components.
! General Description
The XC9502 series are PWM controlled, PWM/PFM automatic
switching controlled, multi-functional, 2 channel step-up and
down 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 to 30V. Since the output 2 (stepdown DC/DC controller) has a built-in 0.9V reference voltage
(accuracy ±2%), 0.9V to 6.0V can be set using external
components. With a 180kHz frequency, the size of the
external components can be reduced. Switching frequencies
of 300kHz & 500kHz are also available as custom-designed
products.
The control of the XC9502 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.
Output 2 (Step-down) : 0.9V ~ 6.0V
Can be set freely with 0.9V
(±2.0%) of reference voltage supply
and external components.
±15%
Oscillation Frequency
: 180kHz
Output Current
Output 1
: more than 300mA (VIN=1.8V, VOUT=3.3V)
Output 2
: more than 1000mA (VIN=3.3V, VOUT=1.8V)
(300kHz, 500kHz custom)
Stand-By Function
Package
Soft-Start Time
: 3.0µA (MAX.)
: MSOP-10
: 10 ms (internally set)
! Typical Performance Characteristics
XC9502B093A (300kHz,VOUT1:3.3V,VOUT2:1.8V)
L1=15µH,L2=22µH(CDRH5D28),CL1,CL2=92µF(Tantalum)
SD1,SD2:CMS02, Tr1:XP161A1355P,Tr2:XP162A12A6P
Efficiency 1,2 EFFI1,2 (%)
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 10msec (Output 1) and offers protection
against in-rush currents when the power is switched. This also
prevents voltage overshoot.
! Typical Application Circuit
100
90
80
70
60
50
40
30
20
10
0
PWM/PFM Switching Control
VOUT1:3.3V
VOUT2:1.8V
PWM Control
VIN=2.7V
0.1
1
XC9502B092A Input :
2 cell, VOUT1 : 3.3V, VOUT2 : 1.8V
VOUT1:3.3V
SD1
:MA2Q737
RFB11
:200kΩ
CFB1
:62pF
Tr2:Pch
MOSFET
XP162A12A6P
L1:22µH
CDRH5D28
Tr2:Nch
MOSFET
:XP161A1355P
CL1
:47µFX2
VIN
=2.0V
~3.0V
L2:22µH
CDRH5D28
VOUT2:1.8V
SD2
:MA2Q737
CIN
:47µF
CFB2
:62pF
RFB21
:220kΩ
CL2
:47µFX2
1 EXT1 EXT2/ 10
VPW M1
RFB12
:75kΩ
VNE1
2 VDD
GND 9
3 FB1
FB2 8
4 PW M1 PW M2 7
VPW M2
5 EN1
VNE2
EN2 6
10
100
Output Current 1,2 IOUT1,2 (mA)
RFB22
:220kΩ
1
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
! Pin Configuration
1 EXT1
EXT2 10
2 VDD
GND 9
3 FB1
FB2 8
4 PWM1
PWM2 7
5 EN1
EN2 6
MSOP-10
(TOP VIEW)
! Pin Assignment
PIN NUMBER
PIN NAME
1
EXT 1
2
VDD
Supply Voltage
3
FB1
Channel 1 : Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage
can be set freely by connecting split resistors between VOUT1 and Ground.>
4
PWM1
Channel 1 : PWM/PFM Switching Pin <Control Output 1. PWM control when connected to
VDD, PWM / PFM auto switching when connected to Ground. >
5
EN1
Channel 1 : Enable Pin <Connected to Ground when Output 1 is in stand-by mode.
Connected to VDD when Output 1 is active. EXT1 is low when in stand-by mode.>
6
EN2
Channel 2 : Enable Pin <Connected to Ground when Output 2 is in stand-by mode.
Connected to VDD when Output 2 is active. EXT2/ is high when in stand-by mode.>
7
PWM2
Channel 2 : PWM/PFM Switching Pin <Control Output 2. PWM control when connected to
VDD, PWM / PFM auto switching when connected to Ground.>
8
FB2
Channel 2 : Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage
can be set freely by connecting split resistors between VOUT2 and Ground.>
9
GND
Ground
10
EXT2/
Channel 2 : External Transistor Drive Pin <Connected to Pch Power MOSFET Gate>
FUNCTIONS
Channel 1: External Transistor Drive Pin <Connected to Nch Power MOSFET Gate>
! Ordering Information
XC9502123456
DESIGNATOR
SYMBOL
1
2
3
B
Standard (10 Pin)
0
9
FB Voltage
4
2
3
5
A
180kHz
Package
MSOP-10
R
Embossed Tape
Standard Feed
L
Embossed Tape
Reverse Feed
5
6
DESCRIPTION
0.9V
Switching Frequency
300kHz (custom)
500kHz (custom)
2
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
! Absolute Maximum Ratings
Ta=25OC
PARAMETER
SYMBOL
RATINGS
UNITS
VDD Pin Voltage
VDD
- 0.3 ~ 12
V
FB1, 2 Pin Voltage
VFB
- 0.3 ~ 12
V
EN1, 2 Pin Voltage
VEN
- 0.3 ~ 12
V
PWM1,2 Pin Voltage
VPWM
- 0.3 ~ 12
V
EXT1, 2 Pin Voltage
VEXT
- 0.3 ~ VDD + 0.3
V
EXT1, 2 Pin Current
IEXT
± 100
mA
Power Dissipation
Pd
150
mW
Operating Ambient Temperature
Topr
- 40 ~ + 85
O
- 55 ~ + 125
O
Storage Temperature
Tstg
C
C
* Voltage goes to Ground.
! Block Diagram
PWM/PFM
Controller 1
EXT1
+
-
-
GND
+
+
+
Error
Amp1
EXT2
PWM
Comparator2
PW
Comparator1
M
VDD
FB1
PWM/PFM
Controller 2
FB2
Ramp Wave
Generator 1
Ramp Wave
Generator 2
Error
Amp2
PWM1
PWM2
OSC
Generator
EN1
Vref1 = 0.9V
with Soft Start1,
EN1
EN1 to
internal circuit
EN2 to
internal circuit
3
Vref2 = 0.9V
with Soft Start 1,
EN2
EN2
XC9502 Series
! Electrical Characteristics
2ch. Step-up / down DC/DC Controller ICs
XC9502B092
Common Characteristics
Ta=25OC
(FOSC=180kHz)
PARAMETER
SYMBOL
Supply Voltage (note 1)
Max. Input Voltage
VDD
VIN
CONDITIONS
VDD ≥ 2.0V, IOUT1, 2=1mA
VOUTSET VDD≠VOUT1
VIN ≥ 0.9V, IOUT1, 2=1mA
VDD=VOUT1
FB1, 2=0V
Supply Current 1
IDD1
Supply Current 1-1
IDD1-1
EN1=3.0V, EN2=0V, FB1=0V
Supply Current 1-2
IDD1-2
EN2=3.0V, EN1=0V, FB2=0V
Supply Current 1-3
IDD1-3
FB1=0V, FB2=1.0V
FB1=1.0V, FB2=0V
IDD1-4
Supply Current 1-4
Supply Current 2
IDD2
FB1, 2=1.0V
Stand-by Current
ISTB
Same as IDD1, EN1=EN2=0V
Switching Frequency
FOSC
Same as IDD1
EN1,2 "High" Voltage
VENH
FB1,2=0V
EN1,2 "Low" Voltage
VENL
FB1,2=0V
EN1,2 "High" Current
IENH
EN1,2=3.0V
EN1,2 "Low" Current
IENL
EN1,2=0V, FB1,2=3.0V
PWM1,2 "High" Current
IPWMH FB1, 2=3.0V, PWM=3.0V
PWM1,2 "Low" Current
IPWML
FB1, 2=3.0V, PWM=0V
IFBH
FB1, 2=3.0V
FB1,2 "High" Current
FB1,2 "Low" Current
FB1, 2=1.0V
VFBL
Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V
Output Voltage Range
(note 3)
Output 1 Characteristics
VOUT1
VOUT2
VOUT1
VOUT2
MIN.
TYP.
MAX.
UNITS
2.0
10.0
0.9
0.9
2.0
0.9
153
0.65
-
70
60
50
70
60
60
1.0
180
-
10.0
VIN
10.0
VIN
160
120
110
160
130
130
3.0
207
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
kHz
V
V
µA
µA
µA
µA
µA
µA
TEST
CIRCUIT
1
1
1
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Ta=25OC
Step-up Controller
TYP.
MAX.
UNITS
TEST
CIRCUIT
0.882 0.900
VDD=3.0V, VIN=1.5V, IOUT1=10mA
Using Tr: 2SD1628,
Operation Start-up Voltage1
VST1-1 IOUT1=1.0mA, RFB11=200kΩ, RFB12=75kΩ
(note 2)
VDD ≠ VOUT1: IOUT1=1mA
Oscillation Start-up Voltage1
VST2-1 FB1=0V
Maximum Duty Ratio1
MAXDTY1 Same as IDD1
75
80
Minimum Duty Ratio1
MINDTY1 Same as IDD2
PFM Duty Ratio1
PFMDTY1 No Load, VPWM1=0V
22
30
IOUT=130mA
Efficiency1 (note 4)
EFFI1
85
N-ch MOSFET:XP161A1355P
VOUT1 × 0.95V, EN1=0V→0.65V
Soft-Start Time1
TSS1
5.0
10.0
28
EXT1 "High" ON Resistance REXTBH1 FB1=0, EXT1=VDD-0.4V
EXT1 "Low" ON Resistance
REXTBL1 EN1=FB2=0V, EXT1=0.4V
22
0.65
PWM1 "High" Voltage
VPWMH1 No Load
PWM1 "Low" Voltage
VPWML1 No Load
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
0.918
V
4
PARAMETER
FB1 Voltage
SYMBOL
CONDITIONS
MIN.
VFB1
Output 2 Characteristics
0.9
V
2
2.0
0.8
85
0
38
V
V
%
%
%
1
3
3
3
5
-
%
5
20.0
47
30
0.20
mS
Ω
Ω
V
V
5
6
6
5
5
Ta=25OC
Step-down Controller
PARAMETER
SYMBOL
FB2 Voltage
Minimum Operation Voltage
Maximum Duty Ratio2
Minimum Duty Ratio2
PFM Duty Ratio2
VFB2
VINmin
MAXDTY2
MINDTY2
PFMDTY2
CONDITIONS
VIN=3.0V, IOUT2=10mA
MIN.
TYP.
MAX.
UNITS
TEST
CIRCUIT
0.882
100
22
0.900
30
0.918
2.0
0
38
V
V
%
%
%
7
1
3
3
8
Same as IDD1
Same as IDD2
No Load, VPWM2=0V
IOUT2=250mA
Efficiency2 (note 4)
EFFI2
92
%
8
P-ch MOSFET : XP162A12A6P
VOUT2 × 0.95V, EN2=0V→0.65V
Soft-Start Time2
8
10.0
TSS2
20.0
mS
5.0
28
47
6
EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V
Ω
22
30
Ω
6
EXT2 "Low" ON Resistance
REXTBL2 FB2=0V, EXT2=0.4V
8
0.65
V
PWM2 "High" Voltage
VPWMH2 No Load
V
8
PWM2 "Low" Voltage
VPWML2 No Load
0.20
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
Notes 1) Although the IC's step-up operations start from a VDD of 0.8V, the output voltage and switching frequency are stabilized at VDD ≥
2.0V. Therefore, a VDD of more than 2.0V is recommended when VDD is supplied from VIN or other power sources.
2) Although the IC's switching 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 VOUT1. With operations from V IN=0.9V, the 2nd channel's (output 2) EN2 pin should be set to chip
disable. Once ouput voltage VOUT1 is more than 2.0V, the EN2 pin should be set to chip enable.
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
4
XC9502 Series
! Electrical Characteristics
2ch. Step-up / down DC/DC Controller ICs
XC9502B093
Common Characteristics
(FOSC=300kHz)
PARAMETER
SYMBOL
Supply Voltage (note 1)
Max. Input Voltage
VDD
VIN
CONDITIONS
VDD ≥ 2.0V, IOUT1, 2=1mA
VOUTSET VDD≠VOUT1
VIN ≥ 0.9V, IOUT1, 2=1mA
VDD=VOUT1
Supply Current 1
IDD1
FB1, 2=0V
Supply Current 1-1
IDD1-1
EN1=3.0V, EN2=0V, FB1=0V
Supply Current 1-2
IDD1-2
EN2=3.0V, EN1=0V, FB2=0V
Supply Current 1-3
IDD1-3
FB1=0V, FB2=1.0V
Supply Current 1-4
IDD1-4
FB1=1.0V, FB2=0V
Supply Current 2
IDD2
FB1, 2=1.0V
ISTB
Same as IDD1, EN1=EN2=0V
Stand-by Current
Switching Frequency
FOSC
Same as IDD1
EN1,2 "High" Voltage
VENH
FB1,2=0V
EN1,2 "Low" Voltage
VENL
FB1,2=0V
IENH
FB1,2=3.0V
EN1,2 "High" Current
IENL
EN1,2=0V, FB1,2=3.0V
EN1,2 "Low" Current
PWM1,2 "High" Current
IPWMH FB1, 2=3.0V, PWM=3.0V
PWM1,2 "Low" Current
IPWML
FB1, 2=3.0V, PWM=0V
IFBH
FB1, 2=3.0V
FB1,2 "High" Current
VFBL
FB1, 2=1.0V
FB1,2 "Low" Current
Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V
Output Voltage Range
(note 3)
Output 1 Characteristics
VOUT1
VOUT2
VOUT1
VOUT2
MIN.
TYP.
MAX.
2.0
10.0
0.9
0.9
2.0
0.9
255
0.65
-
100
80
60
100
70
70
1.0
300
-
10.0
VIN
10.0
VIN
190
150
120
190
150
150
3.0
345
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
Step-up Controller
PARAMETER
SYMBOL
FB1 Voltage
VFB1
TYP.
MAX.
VDD=3.0V, VIN=1.5V, IOUT1=10mA
0.882 0.900
Using Tr: 2SD1628,
Operation Start-up Voltage1
VST1-1 IOUT1=1.0mA, RFB11=200kΩ, RFB12=75kΩ
(note 2)
VDD ≠ VOUT1: IOUT1=1mA
Oscillation Start-up Voltage1
VST2-1 FB1=0V
Maximum Duty Ratio1
MAXDTY1 Same as IDD1
75
80
Minimum Duty Ratio1
MINDTY1 Same as IDD2
PFM Duty Ratio1
PFMDTY1 No Load, VPWM1=0V
22
30
IOUT=130mA
85
Efficiency1 (note 4)
EFFI1
N-ch MOSFET:XP161A1355P
VOUT1
×
0.95V,
EN1=0V→0.65V
Soft-Start Time1
TSS1
5.0
10.0
28
EXT1 "High" ON Resistance REXTBH1 FB1=0, EXT1=VDD-0.4V
22
EXT1 "Low" ON Resistance
REXTBL1 EN1=FB2=0V, EXT1=0.4V
PWM1 "High" Voltage
VPWMH1 No Load
0.65
PWM1 "Low" Voltage
VPWML1 No Load
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
0.918
Output 2 Characteristics
CONDITIONS
MIN.
SYMBOL
FB2 Voltage
Minimum Operation Voltage
Maximum Duty Ratio2
Minimum Duty Ratio2
PFM Duty Ratio2
VFB2
VINmin
MAXDTY2
MINDTY2
PFMDTY2
CONDITIONS
VIN=3.0V, IOUT2=10mA
Notes
0.9
V
2
V
V
%
%
%
1
3
3
3
5
-
%
5
20.0
47
30
0.20
mS
Ω
Ω
V
V
5
6
6
5
5
MIN.
TYP.
MAX.
0.900
100
22
0.900
30
0.900
2.0
0
38
Same as IDD1
Same as IDD2
No Load, VPWM2=0V
IOUT2=250mA
Efficiency2
EFFI2
92
P-ch MOSFET : XP162A12A6P
VOUT2 × 0.95V, EN2=0V→0.65V
Soft-Start Time2
TSS2
5.0
10.0
28
EXT2 "High" ON Resistance REXTBH2 EN2=0V, EXT2=VDD-0.4V
22
EXT2 "Low" ON Resistance
REXTBL2 FB2=0V, EXT2=0.4V
PWM2 "High" Voltage
VPWMH2 No Load
0.7
PWM2 "Low" Voltage
VPWML2 No Load
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
Ta=25OC
TEST
UNITS
CIRCUIT
V
4
2.0
0.8
85
0
38
Step-down Controller
PARAMETER
Ta=25OC
TEST
UNITS
CIRCUIT
V
1
V
1
V
1
V
V
2
V
µA
3
µA
3
µA
3
µA
3
µA
3
µA
3
µA
3
kHz
3
V
3
V
3
µA
3
µA
3
µA
3
µA
3
µA
3
µA
3
Ta=25OC
TEST
UNITS
CIRCUIT
V
7
V
1
%
3
%
3
%
8
-
%
8
20.0
47
30
0.20
mS
Ω
Ω
V
V
8
6
6
8
8
1) Although the IC's step-up operations start from a VDD of 0.8V, the output voltage and switching frequency are stabilized at VDD ≥
2.0V. Therefore, a VDD of more than 2.0V is recommended when VDD is supplied from VIN or other power sources.
2) Although the IC's switching 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 VOUT1. With operations from V IN=0.9V, the 2nd channel's (output 2) EN2 pin should be set to chip
disable. Once ouput voltage VOUT1 is more than 2.0V, the EN2 pin should be set to chip enable.
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
5
XC9502 Series
! Electrical Characteristics
2ch. Step-up / down DC/DC Controller ICs
XC9502B095
Common Characteristics
PARAMETER
SYMBOL
Supply Voltage (note 1)
Max. Input Voltage
VDD
VIN
CONDITIONS
VDD ≥ 2.0V, IOUT1, 2=1mA
VOUTSET VDD≠VOUT1
VIN ≥ 0.9V, IOUT1, 2=1mA
VDD=VOUT1
Supply Current 1
IDD1
FB1, 2=0V
Supply Current 1-1
IDD1-1
EN1=3.0V, EN2=0V, FB1=0V
Supply Current 1-2
IDD1-2
EN2=3.0V, EN1=0V, FB2=0V
Supply Current 1-3
IDD1-3
FB1=0V, FB2=1.0V
Supply Current 1-4
IDD1-4
FB1=1.0V, FB2=0V
Supply Current 2
IDD2
FB1, 2=1.0V
ISTB
Same as IDD1, EN1=EN2=0V
Stand-by Current
Switching Frequency
FOSC
Same as IDD1
EN1,2 "High" Voltage
VENH
FB1,2=0V
EN1,2 "Low" Voltage
VENL
FB1,2=0V
IENH
EN1,2=3.0V
EN1,2 "High" Current
IENL
EN1,2=0V, FB1,2=3.0V
EN1,2 "Low" Current
PWM1,2 "High" Current
IPWMH FB1, 2=3.0V, PWM=3.0V
PWM1,2 "Low" Current
IPWML
FB1, 2=3.0V, PWM=0V
IFBH
FB1, 2=3.0V
FB1,2 "High" Current
VFBL
FB1, 2=1.0V
FB1,2 "Low" Current
Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V
Output Voltage Range
(note 3)
Output 1 Characteristics
SYMBOL
FB1 Voltage
VFB1
Oscillation Start-up Voltage1
Maximum Duty Ratio1
Minimum Duty Ratio1
PFM Duty Ratio1
VOUT1
VOUT2
VOUT1
VOUT2
MIN.
TYP.
MAX.
UNITS
2.0
10.0
0.9
0.9
2.0
0.9
425
0.65
-
130
110
80
130
90
90
1.0
500
-
10.0
VIN
10.0
VIN
250
220
150
240
190
190
3.0
575
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
kHz
V
V
µA
µA
µA
µA
µA
µA
CONDITIONS
VDD=3.0V, VIN=1.5V, IOUT1=10mA
Using Tr: 2SD1628,
VST1-1 IOUT1=1.0mA, RFB11=200kΩ, RFB12=75kΩ
VDD ≠ VOUT1: IOUT1=1mA
VST2-1 FB1=0V
MAXDTY1 Same as IDD1
MINDTY1 Same as IDD2
PFMDTY1 No Load, VPWM1=0V
EFFI1
Output 2 Characteristics
SYMBOL
FB2 Voltage
Minimum Operation Voltage
Maximum Duty Ratio2
Minimum Duty Ratio2
PFM Duty Ratio2
VFB2
VINmin
MAXDTY2
MINDTY2
PFMDTY2
Efficiency2
EFFI2
VIN=3.0V, IOUT2=10mA
Same as IDD1
Same as IDD2
No Load, VPWM2=0V
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
UNITS
TEST
CIRCUIT
0.882
0.900
0.918
V
4
-
-
0.9
V
2
75
22
80
30
2.0
0.8
85
0
38
V
V
%
%
%
1
3
3
3
5
-
%
5
20.0
47
30
0.20
mS
Ω
Ω
V
V
5
6
6
5
5
Ta=25OC
MIN.
TYP.
MAX.
UNITS
TEST
CIRCUIT
0.882
100
22
0.900
30
0.918
2.0
0
38
V
V
%
%
%
7
1
3
3
8
-
%
8
20.0
47
30
0.20
mS
Ω
Ω
V
V
8
6
6
8
8
IOUT2=250mA
91
P-ch MOSFET : XP162A12A6P
VOUT2 × 0.95V, EN2=0V→0.65V
Soft-Start Time2
TSS2
5.0
10.0
28
EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V
22
EXT2 "Low" ON Resistance
REXTBL2 FB2=0V, EXT2=0.4V
PWM2 "High" Voltage
VPWMH2 No Load
0.65
PWM2 "Low" Voltage
VPWML2 No Load
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
Notes
2
MAX.
IOUT=130mA
CONDITIONS
1
TYP.
Step-down Controller
PARAMETER
1
1
MIN.
83
N-ch MOSFET:XP161A1355P
VOUT1 × 0.95V, EN1=0V→0.65V
Soft-Start Time1
TSS1
5.0
10.0
28
EXT1 "High" ON Resistance REXTBH1 FB1=0, EXT1=VDD-0.4V
22
EXT1 "Low" ON Resistance
REXTBL1 EN1=FB2=0V, EXT1=0.4V
PWM1 "High" Voltage
VPWMH1 No Load
0.65
PWM1 "Low" Voltage
VPWML1 No Load
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
Efficiency1 (note 4)
TEST
CIRCUIT
Ta=25OC
Step-up Controller
PARAMETER
Operation Start-up Voltage1
(note 2)
Ta=25OC
(FOSC=500kHz)
1) Although the IC's step-up operations start from a VDD of 0.8V, the output voltage and switching frequency are stabilized at VDD ≥
2.0V. Therefore, a VDD of more than 2.0V is recommended when VDD is supplied from VIN or other power sources.
2) Although the IC's switching 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 VOUT1. With operations from V IN=0.9V, the 2nd channel's (output 2) EN2 pin should be set to chip
disable. Once ouput voltage VOUT1 is more than 2.0V, the EN2 pin should be set to chip enable.
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
6
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
! Operational Description
The XC9502 series are multi-functional, 2 channel step-up and down DC/DC converter controller ICs with built-in high speed, low
ON resistance drivers.
<Error Amp>
The Error Amplifier is designed to monitor the output voltage and it compares the feedback voltage (FB) with the reference
voltage. In response to feedback of a voltage lower than the reference voltage, the output voltage of the error amp. decreases.
<OSC Generator>
This circuit generates the Switching Frequency which in turn generates the reference clock.
<Ramp Wave Generator 1, 2>
The Ramp Wave Generator generates a saw-tooth waveform based on outputs from the Phase Shift 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 switch 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 external 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 switching 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 problems associated with the
PFM mode in stand-by).
<Vref with Soft Start 1, 2>
The reference voltage, Vref (FB pin voltage)=0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please refer
to the notes on page 8). To protect against inrush 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
(CL) from inrush current. With the Vref voltage limited and depending upon the input to the error amps, the operation maintains a
balance between the two inputs of the error amps and controls the EXT pin's ON time so that it doesn't increase more than is
necessary.
<Chip Enable Function>
This function controls the operation and shutdown of the IC. When the voltage of the EN1 or EN2 pins is 0.2V or less, the mode
will be chip disable, the channel's operations will stop and the EXT1 pin will be kept at a low level (the external N-type MOSFET
will be OFF) and the EXT2 pin will be kept at a high level (the external P-type MOSFET will be OFF). When both EN1 and EN2
are in a state of chip disable, current consumption will be no more than 3.0 µA.
When the EN1 or EN2 pin's voltage is 0.65V or more, the mode will be chip enable and operations will recommence. With softstart, 95% of the set output voltage will be reached within 10mS (TYP) from the moment of chip enable.
Although IC starts oscillation from a VIN of 0.9V, the IC's power supply pin (VDD) and the output voltage monitor pin (FB1) should
be connected to VOUT1. The start-up sequence for EN1 and EN2 is required when operations begin with a power supply voltage
of VDD=0.9V, and channel two's (output 2) EN2 pin should be set to chip disable and turn it to enable when VOUT1 is more than
2.0V.
For power supply voltages of V DD<2.0V, oscillation may occur irrespective of the FB pin voltage. Should this happen, you may
find that output voltage will be higher than the set voltage. The FB pin voltage and the reference voltage Vref will be compared
and output voltage will be controlled when the power supply voltage is V DD>2.0V or more. With power supply voltages of
VDD>2.0V, the start-up sequence for EN1 and EN2 will not be required.
7
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
<Setting of Output Voltage>
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the
values of RFB11(RFB21) and RFB12(RFB22). The sum of RFB11(RFB21) and RFB12(RFB22) should normally be 1 M Ω or less.
VOUT=0.9 × (RFB11+RFB12) /RFB12
The value of CFB1(CFB2), speed-up capacitor for phase compensation, should be fzfb= 1 / (2 × π × CFB1 × RFB11) which is
equal to 12kHz. Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of
load capacity (CL).
[Example of Calculation]
When RFB11=200kΩ and RFB12=75kΩ, VOUT1=0.9 × (200K+75k) / 75k=3.3V.
[Typical Example]
VOUT RFB11 RFB12 CFB1
(V)
(pF)
(kΩ)
(kΩ)
VOUT RFB11 RFB12 CFB1
(V)
(pF)
(kΩ)
(kΩ)
VOUT RFB11 RFB12 CFB1
(V)
(pF)
(kΩ)
(kΩ)
2.5
390
220
8.0
120
15
100
30
270
430
33
33
13
82
220
330
62
2.7
360
180
12.0
160
3.0
560
240
24
220
220
62
3.3
200
75
62
330
270
39
390
270
33
5.0
82
18
160
The same method can be adopted for channel two (output 2) also.
[External Components]
Output 1 (Step-up DC/DC controller)
Output 2 (Step-down DC/DC controller)
1.0
1.5
1.8
2.0
2.2
Tr 1 :
* MOSFET
XP161A1355PR
Tr 2 :
(TOREX N-Channel Power MOSFET)
Note : VGS Breakdown Voltage of this Tr. is 8V so
please be careful with the power supply voltage. For 6V
power supply voltage, XP161A1265PR which VGS
breakdown voltage is 12V is recommended.
VST1 of XP161A1355PR is 1.2V (max.) and that of
XP161A1265PR is 1.5V (max.)
SD 1 : MA2Q737
(Schottky , MATSUSHITA)
CMS02
(Schottky, TOSHIBA)
L 1:
10µH
(SUMIDA, CDRH5D28, FOSC = 500kHz)
15µH
(SUMIDA, CDRH5D28, FOSC = 300kHz)
22µH
(SUMIDA, CDRH5D28, FOSC = 180kHz)
CL1 : 16V, 47µF
(Tantalum)
Increase capacity according to the equation below
when the step-up voltage ratio is large and output
current is high.
* MOSFET
XP162A12A6P (TOREX P-Channel Power MOSFET)
Note : VGS Breakdown Voltage of this Tr. is 12V so
please be careful with the power supply voltage.
SD 2 : MA2Q737 (Schottky , MATSUSHITA)
CMS02
(Schottky, TOSHIBA)
L 2:
10µH
(SUMIDA, CDRH5D28, FOSC = 500kHz)
22µH
(SUMIDA, CDRH5D28, FOSC = 300kHz)
47µH
(SUMIDA, CDRH5D28, FOSC = 180kHz)
CL2 : 16V, 47µF (Tantalum)
Increase capacity according to the equation below
when the step-up voltage ratio is large and output
current is high.
C=(CL standard value)×(IOUT1(mA)/300mA×VOUT1/VIN
C=(CL standard value)×(IOUT2 (mA)/500mA×VOUT2/VIN
Tr :
* NPN MOSFET
2SD1628 (SANYO)
RB 1 : 500Ω ( Adjust in accordance with load & Tr.'s HFE.)
Set according to the equation below.
RB1 ≤ (VIN-0.7) x hFE / IC-REXTBH
Tr :
* PNP MOSFET
2SA1213
(SANYO)
RB 2 : 500Ω ( Adjust in accordance with load & Tr.'s HFE.)
Set according to the equation below.
RB2 ≤ (VIN-0.7) x hFE / IC-REXTBH
CB1 :
CB1 :
2200pF (Ceramic)
Set according to the equation below.
CB1 ≤ (2 π x RB2 x FOSC x 0.7)
8
2200pF (Ceramic)
Set according to the equation below.
CB2 ≤ (2 π x RB2 x FOSC x 0.7)
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
! Test Circuits
Circuit 5
Circuit 1
SBD1
VIN
RFB11
A
Nch
MOSFET1
2200pF
1 EXT1
2200pF
CFB1
2 VDD
510Ω
A
3 FB1
4 PWM1
1 EXT1
EXT2 10
VIN
CIN
62pF
CFB2
V
CL1
FB2 8
CL2
2 VDD
GND 9
3 FB1
FB2 8
RL
RL2
4 PWM1
PWM2 7
PWM2 7
75kΩ
RFB22
RFB12
5 EN1
EXT2 10
200kΩ
RFB21
SBD2
GND 9
1µF
CL1
L1
VOUT1
VOUT2
CIN
510Ω
NPN
Tr1
SBD1
L2
PNP
Tr2
L1
VOUT1
5 EN1
OSC
EN2 6
VPW M1
EN2 6
VEN1
Circuit 6
Circuit 2
SBD1
510Ω
NPN
Tr1
2200pF
1 EXT1
2200pF
CFB1
VOUT2
CIN
VIN
RFB11
L2
PNP
Tr2
L1
VOUT1
1 EXT1
510Ω
EXT2 10
2 VDD
GND 9
3 FB1
FB2 8
2 VDD
SBD2
CFB2
3 FB1
Rp
CL1
4 PWM1
CL2
4 PWM1
RL2
GND 9
A
FB2 8
PWM2 7
OSC
PWM2 7
1µF
RFB22
RFB12
5 EN1
EXT2 10
RFB21
VPW M1
VDD
5 EN1
VPW M2
EN2 6
VEXT2
EN2 6
VFB1
VEXT1
VFB2
VEN2
VEN1
Circuit 7
Circuit 3
Pch
MOSFET2
1 EXT1
GND 9
3 FB1
FB2 8
A
VIN
CIN
A
4 PWM1
A
A
5 EN1
EN2 6
1 EXT1
2 VDD
3 FB1
PWM2 7
OSC
A
A
A
4 PWM1
5 EN1
VFB1
VPW M1
VEN1
VEN2
VPW M2
SBD2
GND 9
V
FB2 8
CL2
RL
PWM2 7
EN2 6
VFB2
Circuit 4
Circuit 8
L1
VOUT1
EXT2 10
OSC
A
1µF
VDD
VOUT2
A
EXT2 10
2 VDD
L2
Nch
MOSFET1
Pch
MOSFET2
L2
VOUT2
A
A
1 EXT1
SBD1
CL1
V
EXT2 10
VIN
VIN
CIN
2 VDD
CIN
RL
3 FB1
4 PWM1
1 EXT1
GND 9
FB2 8
3 FB1
4 PWM1
PWM2 7
EXT2 10
SBD2
200kΩ
2 VDD
GND 9
FB2 8
62pF
V
CL2
PWM2 7
75kΩ
5 EN1
VDD
5 EN1
EN2 6
1µF
9
EN2 6
RL
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
! Peripheral Components Used for Test Circuits
Circuits 1, 2
L1, L2 :
SD1, SD2 :
CL1, CL2 :
CIN :
NPN Tr1 :
PNP Tr1 :
RFB :
CFB :
22µH (SUMIDA CDRH5D28) : XC9502B092A
15µH (SUMIDA CDRH5D28) : XC9502B093A
10µH (SUMIDA CDRH5D28) : XC9502B095A
CRS02 (Schottky diode, TOSHIBA)
EC10QS06 (Schottky diode, NIHON INTER)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
35MCE335MB2 x 3 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
2SD1628 (SANYO)
2SA1213 (TOSHIBA)
Please use by the conditions as below.
RFB11 + RFB12 ≤ 1MΩ
RFB21 + RFB22 ≤ 1MΩ
RFB11 / RFB12 = (Setting Output Voltage / 0.9) -1
VOUT2=(0.9-VOUT1) X (RFB21/RFB22) + 0.9V
Please adjust as below:
fzfb=1/(2 x π x CFB1 x RFB11) = 1kHz ~50kHz ( 12kHz usual)
fzfb=1/(2 x π x CFB2 x RFB21) = 1kHz ~50kHz ( 12kHz usual)
Circuits 4
L1 :
SD1 :
CL1 :
CIN :
N-ch MOSFET1 :
22µH (SUMIDA CDRH5D28)
MA2Q737 (Schottky diode, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP161A1355P (TOREX)
Circuits 5
L1 :
SD1 :
CL1 :
CIN :
N-ch MOSFET1 :
22µH (SUMIDA CDRH5D28) : XC9502B092A
15µH (SUMIDA CDRH5D28) : XC9502B093A
10µH (SUMIDA CDRH5D28) : XC9502B095A
MA2Q737 (Schottky, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP161A1355P (TOREX)
Circuit 7
L1 :
SD1 :
CL1 :
CIN :
P-ch MOSFET1 :
22µH (SUMIDA CDRH5D28)
MA2Q737 (Schottky diode, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP162A12A6P (TOREX)
Circuit 8
L2 :
SD2 :
CL2 :
CIN :
P-ch MOSFET1 :
22µH (SUMIDA CDRH5D28) : XC9502B092A
15µH (SUMIDA CDRH5D28) : XC9502B093A
10µH (SUMIDA CDRH5D28) : XC9502B095A
MA2Q737 (Schottky, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP161A12A6P (TOREX)
10
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
! NoteS on Use
1. Checking for Intermittent Oscillation
The XC9502 series is subject to intermittent oscillation in the proximity of the maximum duty if the step-down ratio is low (e.g.,
from 4.2 V to 3.3 V) or a heavy load is applied where the duty ratio becomes high. Check waveforms at EXT under your operating
conditions. A remedy for this problem is to raise the inductance of coil L or increase the load capacitance CL.
2. PWM/PFM Automatic Switching
If PWM/PFM automatic switching control is selected and the step-up ration is low (e.g., from 4.5V to 5.0V) or the step-down ratio is
high (e.g., from 10.0V to 1.0 V), the control mode remains in PFM setting in the whole load range, since the duty ratio under
continuous-duty condition is smaller than the PFM duty ratio of the XC9502 series. The output voltage's ripple voltage becomes
substantially high under heavy load conditions, with the XC9502 series appearing to be producing an abnormal oscillation. If this
operation becomes a concern, set pins PWM1 and PWM2 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 IOUT = 100 mA.
3. Ratings
Use the XC9502 series and peripheral components within the limits of their ratings.
11
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
! Typical Performance Characteristics
< 1ch Step-up DC/DC Controller >
(1) Output Voltage vs. Output Current
FOSC=180kHz, VOUT1= 1.5V
FOSC=180kHz, VOUT1= 2.5V
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
1.7
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
2.7
PWM/PFM Switching Control
PWM Control
Output Voltage1 VOUT1 (V)
Output Voltage1 VOUT1 (V)
PWM/PFM Switching Control
PWM Control
1.6
1.5
VIN=0.9V
1.4
1.2V
1.3
1.2
2.5
VIN=0.9V
2.4
1.2V
2.3
2.2
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
Output Voltage1 VOUT1 (V)
3.3
VIN=0.9V
3.2
100
1.2V,1.5V
3.1
3.0
4.2V
5.1
5.0
VIN=1.5V
4.9
2.7V
3.3V
4.8
4.7
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
1
10
100
Output Current 1 I OUT1 (mA)
FOSC=180kHz, VOUT1= 8.0V
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1265P
8.2
5.0V
PWM/PFM Switching Control
PWM Control
Output Voltage1 VOUT1 (V)
1000
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
5.2
2.7V
3.4
10
FOSC=180kHz, VOUT1= 5.0V
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
3.5
1
Output Current 1 I OUT1 (mA)
FOSC=180kHz, VOUT1= 3.3V
Output Voltage1 VOUT1 (V)
1.5V
2.6
8.1
8.0
VIN=3.3V
4.2V
7.9
7.8
7.7
0.1
1
10
100
1000
Output Current 1 I OUT1 (mA)
Dotted Arrowhead
12
PWM/PFM Switching Control
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 1ch Step-up DC/DC Controller >
(1) Output Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT1= 3.3V
FOSC=300kHz, VOUT1= 2.5V
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
Output Voltage1 VOUT1 (V)
PWM/PFM Switching Control
PWM Control
3.5
PWM/PFM Switching Control
PWM Control
1.5V
Output Voltage1 VOUT1 (V)
2.7
2.6
2.5
2.4
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
VIN=0.9V
1.2V
2.3
3.3
VIN=0.9V
3.2
1.2V
0.1
3.1
1
10
100
0.1
1000
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
1000
2.7
PWM/PFM Switching Control
PWM Control
Output Voltage1 VOUT1 (V)
3.3V
4.2V
5.0
4.9
100
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
PWM/PFM Switching Control
PWM Control
5.1
10
FOSC=500kHz, VOUT1= 2.5V
FOSC=300kHz, VOUT1= 5.0V
5.2
1
Output Current 1 I OUT1 (mA)
Output Current 1 I OUT1 (mA)
Output Voltage1 VOUT1 (V)
1.5V
3.0
2.2
VIN=1.2V
2.7V
1.5V
4.8
1.5V
2.6
2.5
VIN=0.9V
2.4
1.2V
2.3
2.2
4.7
0.1
1
10
100
0.1
1000
FOSC=500kHz, VOUT1= 3.3V
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
Output Voltage1 VOUT1 (V)
1.5V
3.3
3.2
100
1000
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
5.2
2.7V
3.4
10
FOSC=500kHz, VOUT1= 5.0V
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
3.5
1
Output Current 1 I OUT1 (mA)
Output Current 1 I OUT1 (mA)
Output Voltage1 VOUT1 (V)
2.7V
3.4
VIN=0.9V 1.2V
3.1
3.0
4.2V
5.1
3.3V
5.0
4.9
VIN=0.9V
1.2V
4.8
2.7V
1.5V
4.7
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
1
10
100
Output Current 1 I OUT1 (mA)
Dotted Arrowhead
13
PWM/PFM Switching Control
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 1ch Step-up DC/DC Controller >
(2) Efficiency vs. Output Current
FOSC=180kHz, VOUT1= 1.5V
FOSC=180kHz, VOUT1= 2.5V
L1=22µH(CDRH5D28), C L1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
80
Efficiency1 EFFI 1 (%)
80
Efficiency1 EFFI 1 (%)
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
60
VIN=0.9V
1.2V
40
20
60
VIN=0.9V 1.2V
40
20
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
Efficiency1 EFFI 1 (%)
Efficiency1 EFFI 1 (%)
1.2V 1.5V
60
100
1000
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
2.7V
80
10
FOSC=180kHz, VOUT1= 5.0V
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
1
Output Current 1 I OUT1 (mA)
FOSC=180kHz, VOUT1= 3.3V
VIN=0.9V
40
20
80
4.2V
3.3V
60
2.7V
VIN=1.5V
40
20
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
0.1
1000
1
10
100
Output Current 1 I OUT1 (mA)
Output Current 1 I OUT1 (mA)
FOSC=180kHz, VOUT1= 8.0V
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1265P
100
Efficiency1 EFFI 1 (%)
1.5V
80
VIN=3.3V
4.2V
60
5.0V
40
20
PWM/PFM Switching Control
PWM Control
0
0.1
1
10
100
1000
Output Current 1 I OUT1 (mA)
Dotted Arrowhead
14
PWM/PFM Switching Control
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 1ch Step-up DC/DC Controller >
(2) Efficiency vs. Output Current (Continued)
FOSC=300kHz, VOUT1= 2.5V
FOSC=300kHz, VOUT1= 3.3V
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
80
Efficiency1 EFFI 1 (%)
Efficiency1 EFFI 1 (%)
2.7V
1.5V
60
VIN=0.9V
1.2V
40
20
80
1.2V
VIN=0.9V 1.5V
60
40
20
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
FOSC=300kHz, VOUT1= 5.0V
10
100
1000
FOSC=500kHz, VOUT1= 2.5V
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
1
Output Current 1 I OUT1 (mA)
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
PWM/PFM Switching Control
PWM Control
Efficiency1 EFFI 1 (%)
Efficiency1 EFFI 1 (%)
80
4.2V
60
3.3V
VIN=1.2V
2.7V
1.5V
40
20
80
1.5V
60
1.2V
VIN=0.9V
40
20
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
0.1
1000
Output Current 1 I OUT1 (mA)
FOSC=500kHz, VOUT1= 3.3V
100
1000
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
PWM/PFM Switching Control
PWM Control
4.2V
80
80
Efficiency1 EFFI 1 (%)
Efficiency1 EFFI 1 (%)
10
FOSC=500kHz, VOUT1= 5.0V
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
1
Output Current 1 I OUT1 (mA)
2.7V
60
VIN=0.9
1.2V
40
1.5V
20
3.3V
60
1.2V
40
2.7V
VIN=0.9V 1.5V
20
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
1
10
100
Output Current 1 I OUT1 (mA)
Dotted Arrowhead
15
PWM/PFM Switching Control
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 1ch Step-up DC/DC Controller >
(3) Ripple Voltage vs. Output Current
FOSC=180kHz, VOUT1= 2.5V
FOSC=180kHz, VOUT1= 1.5V
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
PWM/PFM Switching Control
PWM Control
80
Ripple Voltage1 (mV)
Ripple Voltage1 (mV)
PWM/PFM Switching Control
PWM Control
60
1.2V
VIN=0.9V
40
80
VIN=0.9V
1.2V
1.5V
60
40
20
20
0
0
0.1
1
10
100
0.1
1000
Output Current 1 I OUT1 (mA)
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
100
PWM/PFM Switching Control
PWM Control
Ripple Voltage1 (mV)
80
60
1000
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
PWM/PFM Switching Control
PWM Control
Ripple Voltage1 (mV)
10
FOSC=180kHz, VOUT1= 5.0V
FOSC=180kHz, VOUT1= 3.3V
100
1
Output Current 1 I OUT1 (mA)
1.5V
VIN=0.9V
40
2.7V
4.2V
80
2.7V
60
VIN=1.5V
40
20
20
3.3V
1.2V
0
0
0.1
1
10
100
0.1
1000
1
10
100
Output Current 1 I OUT1 (mA)
Output Current 1 I OUT1 (mA)
FOSC=180kHz, VOUT1= 8.0V
L1=22µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1265P
100
PWM/PFM Switching Control
PWM Control
Ripple Voltage1 (mV)
80
4.2V
60
5.0V
VIN=3.3
V
40
20
0
0.1
1
10
100
1000
Output Current 1 I OUT1 (mA)
Dotted Arrowhead
16
PWM/PFM Switching Control
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 1ch Step-up DC/DC Controller >
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT1= 2.5V
FOSC=300kHz, VOUT1= 3.3V
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
1.2V
60
VIN=0.9V
40
20
1.2V
60
VIN=0.9V
40
2.7V
20
0
0
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
1.5V
60
1000
PWM/PFM Switching Control
PWM Control
2.7V
80
100
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
4.2V
3.3V
Ripple Voltage1 (mV)
Ripple Voltage1 (mV)
PWM/PFM Switching Control
PWM Control
10
FOSC=500kHz, VOUT1= 2.5V
L1=15µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
1
Output Current 1 I OUT1 (mA)
FOSC=300kHz, VOUT1= 5.0V
VIN=1.2V
40
20
80
1.2V
60
VIN=0.9V
1.5V
40
20
0
0
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
100
PWM/PFM Switching Control
PWM Control
2.7V
Ripple Voltage1 (mV)
1.2
60
VIN=0.9V
40
20
1000
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
PWM/PFM Switching Control
PWM Control
80
10
FOSC=500kHz, VOUT1= 5.0V
L1=10µH(CDRH5D28), CL1=94µF(Tantalum)
SD1:CMS02, Tr1:XP161A1355P
100
1
Output Current 1 I OUT1 (mA)
FOSC=500kHz, VOUT1= 3.3V
Ripple Voltage1 (mV)
1.5V
80
1.5V
Ripple Voltage1 (mV)
Ripple Voltage1 (mV)
80
2.7V
80
1.5V
1.2V
60
VIN=0.9V
40
4.2V
20
1.5V
3.3V
0
0
0.1
1
10
100
1000
0.1
Output Current 1 I OUT1 (mA)
1
10
100
Output Current 1 I OUT1 (mA)
Dotted Arrowhead
17
PWM/PFM Switching Control
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(4) Output Voltage vs. Output Current
FOSC=180kHz, VOUT2=1.0V
FOSC=180kHz, VOUT2=1.0V
L2=47µH(CDRH6D38), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
1.2
L2=47µH(CDRH6D38), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
1.2
PWM/PFM Switching Control
1.1
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
PWM Control
10V
1.0
0.9
VIN=2.7V 3.3V 4.2V
5.0V 6.0V 8.0V
0.8
0.7
1.1
10V
1.0
0.9
4.2V 5.0V 6.0V 8.0V
VIN=2.7V 3.3V
0.8
0.7
0.1
1
10
100
1000
0.1
1
Output Current2 I OUT2 (mA)
L2=47µH(CDRH6D38), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
5.2
PWM/PFM Switching Control
PWM Control
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
1000
L2=47µH(CDRH6D38), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
PWM/PFM Switching Control
PWM Control
3.4
3.3
3.2
VIN=4.2V 5.0V 6.0V 8.0V 10V
3.1
3.0
5.1
5.0
4.9
VIN= 6.0V 8.0V 10V
4.8
4.7
0.1
1
10
100
1000
0.1
Output Current2 I OUT2 (mA)
100
1000
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
1.2
PWM Control
Output Voltage2 VOUT2 (V)
PWM/PFM Switching Control
1.1
1.0
0.9
10
FOCS=300kHz, VOUT2=1.0V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
1.2
1
Output Current2 I OUT2 (mA)
FOSC=300kHz, VOUT2=1.0V
Output Voltage2 VOUT2 (V)
100
FOSC=180kHz, VOUT2=5.0V
FOSC=180kHz, VOUT2=3.3V
3.5
10
Output Current2 I OUT2 (mA)
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
0.8
0.7
VIN=2.7V 3.3V
5.0V
1.1
1.0
0.9
4.2V 6.0V 8.0V 10V
0.8
0.7
0.1
1
10
100
Output Current2 I OUT2 (mA)
1000
0.1
1
10
100
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
18
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(4) Output Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT2=1.8V
FOSC=300kHz, VOUT2=1.8V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
2.0
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
2.0
PWM/PFM Switching Control
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
PWM Control
1.9
1.8
1.7
VIN= 2.7V 3.3V 4.2V
5.0V 6.0V 8.0V 10V
1.6
6.0V 8.0V 10V
1.9
1.8
1.7
VIN= 2.7V 3.3V 4.2V 5.0V
1.6
1.5
1.5
0.1
1
10
100
0.1
1000
FOSC=300kHz, VOUT2=2.5V
1000
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
2.7
PWM/PFM Switching Control
2.6
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
100
FOSC=300kHz, VOUT2=2.5V
PWM Control
10.0V
2.5
2.4
VIN= 2.7V 3.3V 4.2V
5.0V 6.0V 8.0V
2.3
2.2
10V
2.6
8.0V
2.5
2.4
3.3V 4.2V 5.0V 6.0V
VIN=2.7V
2.3
2.2
0.1
1
10
100
1000
0.1
Output Current2 I OUT2 (mA)
FOSC=300kHz, VOUT2=3.3V
10
100
1000
FOSC=300kHz, VOUT2=3.3V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
PWM Control
3.5
VIN=4.2V 5.0V 6.0V 8.0V
3.4
1
Output Current2 I OUT2 (mA)
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
3.5
PWM/PFM Switching Control
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
10
Output Current2 I OUT2 (mA)
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
2.7
1
Output Current2 I OUT2 (mA)
3.3
10.0V
3.2
3.1
3.0
0.1
1
10
100
3.4
VIN=4.2V 5.0V 6.0V 8.0V
3.3
3.2
10.0V
3.1
1000
Output Current2 I OUT2 (mA)
3.0
0.1
1
10
100
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
19
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(4) Output Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT2=5.0V
FOSC=300kHz, VOUT2=5.0V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
5.2
PWM Control
PWM/PFM Switching Control
10.0V
5.1
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
5.2
5.0
VIN= 6.0V 8.0V
4.9
4.8
4.7
10.0V
5.1
5.0
VIN= 6.0V 8.0V
4.9
4.8
4.7
0.1
1
10
100
1000
0.1
Output Current2 I OUT2 (mA)
FOSC=500kHz, VOUT2=1.0V
1.2
1000
PWM/PFM Switching Control
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
100
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
PWM Control
1.1
1.0
0.9
10
FOSC=500kHz, VOUT2=1.0V
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
1.2
1
Output Current2 I OUT2 (mA)
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
0.8
0.7
VIN=2.7V 3.3V 4.2V 5.0V
1.1
1.0
0.9
6.0V 8.0V 10V
0.8
0.7
0.1
1
10
100
1000
0.1
1
Output Current2 I OUT2 (mA)
FOSC=500kHz, VOUT2=3.3V
100
1000
FOSC=500kHz, VOUT2=3.3V
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
3.5
10
Output Current2 I OUT2 (mA)
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
3.5
PWM Control
PWM/PFM Switching Control
Output Voltage2 VOUT2 (V)
Output Voltage2 VOUT2 (V)
10V
3.4
3.3
VIN=4.2V 5.0V 6.0V 8.0V 10V
3.2
3.1
3.0
3.4
3.3
VIN=4.2V 5.0V 6.0V 8.0V
3.2
3.1
3.0
0.1
1
10
100
Output Current2 I OUT2 (mA)
1000
0.1
1
10
100
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
20
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(4) Output Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT2=5.0V
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
5.2
Output Voltage2 VOUT2 (V)
PWM/PFM Switching Control
PWM Control
5.1
5.0
VIN= 6.0V 8.0V 10V
4.9
4.8
4.7
0.1
1
10
100
1000
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
21
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(5) Efficiency vs. Output Current
FOSC=180kHz, VOUT2=1.0V
FOSC=180kHz, VOUT2=1.0V
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
100
VIN=5.0V
80
Efficiency2 EFFI12 (%)
Efficiency2 EFFI12 (%)
PWM/PFM Switching Control
PWM Control
60
4.2V
40
3.3V
VIN=2.7V
20
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
0
80
8.0V
60
6.0V
40
10V
20
PWM/PFM Switching Control
PWM Control
0
0.1
1
10
100
1000
0.1
10
100
Output Current2 I OUT2 (mA)
FOSC=180kHz, VOUT2=3.3V
FOSC=180kHz, VOUT2=5.0V
1000
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
1
Output Current2 I OUT2 (mA)
100
VIN=4.2V
Efficiency2 EFFI12 (%)
Efficiency2 EFFI12 (%)
5.0V
80
10V
60
8.0V
6.0V
40
20
80
10V
60
8.0V
VIN=6.0V
40
20
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
1000
0.1
100
FOSC=300kHz, VOUT2=1.0V
FOSC=300kHz, VOUT2=1.0V
100
Efficiency2 EFFI12 (%)
80
60
4.2
3.3V
40
VIN=2.7V
20
1000
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
Efficiency2 EFFI12 (%)
10
Output Current2 I OUT2 (mA)
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
1
Output Current2 I OUT2 (mA)
10V
80
8.0V
6.0V
60
40
20
VIN=5.0V
0
0
0.1
1
10
100
1000
0.1
Output Current2 I OUT2 (mA)
1
10
100
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
22
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(5) Efficiency vs. Output Current (Continued)
FOSC=300kHz, VOUT2=1.8V
FOSC=300kHz, VOUT2=1.8V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
Efficiency2 EFFI12 (%)
Efficiency2 EFFI12 (%)
100
VIN= 2.7V
60
3.3V
40
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
4.2V
20
0
PWM/PFM Switching Control
PWM Control
80
10V
60
VIN=5.0V
8.0V
40
6.0V
20
0
0.1
1
10
100
1000
0.1
1
Output Current2 I OUT2 (mA)
FOSC=300kHz, VOUT2=2.5V
Efficiency2 EFFI12 (%)
Efficiency2 EFFI12 (%)
80
VIN=2.7V
3.3V
40
4.2V
20
PWM/PFM Switching Control
PWM Control
0
PWM/PFM Switching Control
PWM Control
80
10V
60
VIN=5.0V
40
8.0V
6.0V
20
0
0.1
1
10
100
1000
0.1
Output Current2 I OUT2 (mA)
Efficiency2 EFFI12 (%)
60
8.0V
40
6.0V
VIN=4.2V
1000
PWM/PFM Switching Control
PWM Control
10V
20
100
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
10
FOSC=300kHz, VOUT2=5.0V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
1
Output Current2 I OUT2 (mA)
FOSC=300kHz, VOUT2=3.3V
Efficiency2 EFFI12 (%)
1000
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
60
100
FOSC=300kHz, VOUT2=2.5V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr:2XP162A12A6P
100
10
Output Current2 I OUT2 (mA)
5.0V
80
60
10V
40
8.0V
VIN=6.0V
20
0
0
0.1
1
10
100
0.1
1000
1
10
100
Output Current2 I OUT2 (mA)
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
23
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(5) Efficiency vs. Output Current (Continued)
FOSC=500kHz, VOUT2=1.0V
FOSC=500kHz, VOUT2=1.0V
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
Efficiency2 EFFI12 (%)
Efficiency2 EFFI12 (%)
PWM/PFM Switching Control
PWM Control
60
4.2V
40
3.3V
VIN=2.7V
20
0
VIN=5.0V
60
10V
40
8.0V
6.0V
20
0
0.1
1
10
100
1000
0.1
80
1
100
Output Current2 I OUT2 (mA)
FOSC=500kHz, VOUT2=3.3V
FOSC=500kHz, VOUT2=3.3V
Efficiency2 EFFI12 (%)
8.0V
60
6.0V
5.0V
40
VIN=4.2V
20
80
60
10V
40
8.0V
VIN=6.0V
20
PWM/PFM Switching Control
PWM Control
0
PWM/PFM Switching Control
PWM Control
0
1
10
100
1000
0.1
Output Current2 I OUT2 (mA)
1
10
100
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
24
1000
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
10V
0.1
10
Output Current2 I OUT2 (mA)
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
Efficiency2 EFFI12 (%)
80
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(6) Ripple Voltage vs. Output Current
FOSC=180kHz, VOUT2=1.0V
FOSC=180kHz, VOUT2=1.0V
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
80
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
60
40
60
VIN=2.7V
40
4.2V 10V 5.0V 6.0V
8.0V
3.3V
20
20
0
0
0.1
1
10
100
0.1
1000
1
10
100
1000
Output Current2 I OUT2 (mA)
Output Current2 I OUT2 (mA)
FOSC=180kHz, VOUT2=3.3V
FOSC=180kHz, VOUT2=3.3V
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM Control
PWM/PFM Switching Control
60
10V
40
8.0V
5.0V
VIN=4.2V 6.0V
20
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
80
80
60
VIN=4.2V
40
5.0V
6.0V
8.0V
10V
20
0
0.1
1
10
100
0
1000
0.1
Output Current2 I OUT2 (mA)
1
10
100
1000
Output Current2 I OUT2 (mA)
FOSC=180kHz, VOUT2=5.0V
FOSC=180kHz, VOUT2=5.0V
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
L2=47µH(CDRH6D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
80
80
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
PWM Control
60
40
10V
8.0V
VIN=6.0V
20
60
40
VIN=6.0V
8.0V
10V
20
0
0
0.1
1
10
100
Output Current2 I OUT2 (mA)
1000
0.1
1
10
100
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
25
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(6) Ripple Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT2=1.0V
FOSC=300kHz, VOUT2=1.0V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM Control
PWM/PFM Switching Control
80
60
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
80
VIN=2.7V 3.3V 5.0V 6.0V
40
8.0V 10V
4.2V
20
VIN=2.7V
60
40
6.0V 5.0V 10V 4.2V
8.0V 3.3V
20
0
0
0.1
1
10
100
1000
0.1
10
100
Output Current2 I OUT2 (mA)
FOSC=300kHz, VOUT2=1.8V
FOSC=300kHz, VOUT2=1.8V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
1
Output Current2 I OUT2 (mA)
1000
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM Control
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
PWM/PFM Switching Control
80
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
60
40
20
80
60
5.0V 4.2V
10V 8.0V 6.0V
3.3V VIN=2.7V
40
20
0
0
0.1
1
10
100
1000
0.1
100
FOSC=300kHz, VOUT2=2.5V
FOSC=300kHz, VOUT2=2.5V
PWM/PFM Switching Control
Ripple Voltage2 (mV)
80
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
60
1000
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM Control
Ripple Voltage2 (mV)
10
Output Current2 I OUT2 (mA)
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
1
Output Current2 I OUT2 (mA)
40
80
60
VIN=2.7V
10V 8.0V 6.0V 5.0V
40
4.2V
3.3V
20
20
0
0
0.1
1
10
100
0.1
1000
1
10
100
Output Current2 I OUT2 (mA)
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
26
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(6) Ripple Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT2=3.3V
FOSC=300kHz, VOUT2=3.3V
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
80
VIN=4.2V 5.0V 6.0V
8.0V 10V
60
40
60
VIN=4.2V
5.0V
20
20
0
0
0.1
1
10
100
0.1
1000
10
100
Output Current2 I OUT2 (mA)
FOSC=300kHz, VOUT2=5.0V
FOSC=300kHz, VOUT2=5.0V
1000
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
80
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
1
Output Current2 I OUT2 (mA)
L2=22µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
60
VIN=6.0V
40
8.0V
10V
60
40
VIN=6.0V
10.0V
8.0V
20
20
0
0
0.1
1
10
100
0.1
1000
10
100
1000
FOSC=500kHz, VOUT2=1.0V
FOSC=500kHz, VOUT2=1.0V
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
1
Output Current2 I OUT2 (mA)
Output Current2 I OUT2 (mA)
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
80
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
6.0V 8.0V 10.0V
40
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
60
40
60
VIN=2.7V
40
8.0V 10V 5.0V 6.0V
4.2V
3.3V
20
20
0
0
0.1
1
10
100
0.1
1000
1
10
100
Output Current2 I OUT2 (mA)
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
27
1000
XC9502 Series
2ch. Step-up / down DC/DC Controller ICs
< 2ch Step-down DC/DC Controller >
(6) Ripple Voltage vs. Output Current (Continued)
FOSC=500kHz, VOUT2=3.3V
FOSC=500kHz, VOUT2=3.3V
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
80
60
8.0V 10V
6.0V
40
5.0V
VIN=4.2V
20
60
VIN=4.2V
5.0V
40
8.0V
6.0V
10V
20
0
0
0.1
1
10
100
0.1
1000
1
Output Current2 I OUT2 (mA)
FOSC=500kHz, VOUT2=5.0V
100
1000
FOSC=500kHz, VOUT2=5.0V
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
10
Output Current2 I OUT2 (mA)
L2=10µH(CDRH5D28), CL2=94µF(Tantalum)
SD2:CMS02, Tr2:XP162A12A6P
100
PWM Control
Ripple Voltage2 (mV)
Ripple Voltage2 (mV)
PWM/PFM Switching Control
80
60
40
10V
8.0V
VIN=6.0V
20
80
60
40
VIN=6.0V
8.0V
10V
20
0
0
0.1
1
10
100
1000
0.1
Output Current2 I OUT2 (mA)
1
10
100
Output Current2 I OUT2 (mA)
* When setting VOUT = 1.0V, VIN = 8.0V, 10.0V
CL should be 94µF (Tantalum) + 100µF (OS capacitor)
28
1000
XC9502 Series
2ch. Step-up / down DC/DC Controllers
Typical Performance Characteristics
(7) Supply Current vs. Supply Voltage
(8) Supply Current 1-1 vs. Supply Voltage
XC9502B092 (180kHz)
XC9502B092 (180kHz)
Supply Current 1-1 IDD1-1 (µA)
Supply Current 1 IDD1 (µA)
350
Topr=85o C
25o C
-40o C
300
250
200
150
100
50
0
0
2
4
6
8
250
Topr=85o C
25o C
-40o C
200
150
100
50
0
0
10
(9) Supply Current 1-2 vs. Supply Voltage
Supply Current 1-3 IDD1-3 (µA)
Power Supply 1-2 IDD1-2 (µA)
150
100
50
0
2
4
6
8
350
250
200
150
100
50
0
10
0
4
6
8
10
(12) Supply Current 2 vs. Supply Voltage
XC9502B092 (180kHz)
XC9502B092 (180kHz)
250
Topr=85o C
25o C
-40o C
Supply Current 2 IDD2 (µA)
Supply Current 1-4 IDD1-4 (µA)
2
Supply Voltage VDD (V)
(11) Supply Current 1-4 vs. Supply Voltage
200
10
Topr=85o C
25o C
-40o C
300
Supply Voltage VDD (V)
250
8
XC9502B092 (180kHz)
Topr=85o C
25o C
-40o C
0
6
(10) Supply Current 1-3 vs. Supply Voltage
XC9502B092 (180kHz)
200
4
Supply Voltage VDD (V)
Supply Voltage VDD (V)
250
2
150
100
50
0
Topr=85o C
25o C
-40o C
200
150
100
50
0
0
2
4
6
8
10
0
Supply Voltage VDD (V)
2
4
6
8
Supply Voltage VDD (V)
29
10
XC9502 Series
2ch. Step-up / down DC/DC Controllers
(13) Oscillation Frequency vs. Supply Voltage
(14) Standby Current vs. Supply Voltage
XC9502B092 (180kHz)
210
200
Topr=25OC
190
180
85OC
170
160
10
Standby Current ISTB (µA)
Oscillation Frequency Fosc
(kHz)
XC9502B092 (180kHz)
- 40OC
8
6
4
2
0
150
0
2
4
Topr=85o C
25o C
-40o C
6
8
0
10
Supply Voltage VDD (V)
(15) PWM1, 2 'H' 'L' Voltage vs. Supply Voltage
EN1, 2 'H' 'L' Voltage VEN1, 2 (V)
PWM1, 2 H' L' Voltage Vpwm1, 2 (V)
-40OC
0.4
85OC
Topr=25OC
0
0
2
4
6
8
8
10
0.8
0.6
-40OC
0.4
85o C
o
Topr=25 C
0.2
0
10
0
Supply Voltage VDD (V)
2
4
6
8
10
Supply Voltage VDD (V)
(17) Maximum Duty Ratio 1 vs. Supply Voltage
(18) PFM Duty Ratio 1, 2 vs. Supply Voltage
XC9502B092 (180kHz)
XC9502B092(180kHz)
40
85
PFM Duty Ratio 1, 2(%)
Max. Duty Ratio 1 Maxdty 1 (%)
6
XC9502B092 (180kHz)
0.8
0.2
4
(16) EN1, 2 'H' 'L' Voltage vs. Supply Voltage
XC9502B092 (180kHz)
0.6
2
Supply Voltage VDD (V)
80
75
70
Topr=85o C
25o C
-40o C
65
Topr=85o C
25o C
-40o C
35
30
25
20
60
0
2
4
6
8
0
10
2
4
6
8
Supply Voltage VDD (V)
Supply Voltage VDD (V)
30
10
XC9502 Series
2ch. Step-up / down DC/DC Controllers
(19) EXT 1, 2 High ON Resistance vs. Supply Voltage
(20) EXT 1, 2 Low ON Resistance vs. Supply Voltage
XC9502B092 (180kHz)
50
EXT1, 2 L ON Resistance (Ω)
EXT1, 2 H ON Resistance (Ω)
XC9502B092 (180kHz)
Topr=85o C
25o C
-40o C
40
30
20
10
0
0
2
4
6
8
50
Topr=85o C
25o C
-40o C
40
30
20
10
0
10
0
Supply Voltage VDD (V)
(21) Output Voltage vs. Ambient Temperature
8
10
1
Oscillation Starting Voltage
VST2(V)
Output Voltage VOUT(V)
6
XC9502B092 (180kHz,VOUT1=2.0V)
L=22µH(CDRH5D28), CL=94µF(Tantalum)
Tr:XP161A1265P, SD:CMS02
3.4
3.3
3.2
VIN=1.8V
IOUT=200mA
3.1
4
(22) Oscillation Start-up Voltage vs. Ambient Temperature
XC9502B093(300kHz)
3.5
2
Supply Voltage VDD (V)
0.8
0.6
0.4
0.2
3.0
0
-50
-20
10
40
70
100
-40 -20
Ambient Temperature Ta(0 C)
0
20
40
60
80 100
Ambient Temperature Ta(o C)
(23) Operation Retention Voltage vs. Ambient Temperature
(24) Operation Start-up Voltage vs. Ambient Temperature
XC9502B092(180kHz,VOUT1=3.3V)
L=22µH(CDRH5D28), CL=47µF(Tantalum)
SD:MA2Q737, Tr:2SD1628G
L=22µH(CDRH5D28), CL=47µF(Tantalum)
SD:MA2Q737, Tr:2SD1628G
0.8
1.2
Operation Start-up Voltage
VST1(V)
Operation Retention Voltage
VHLD (V)
XC9502B092(180kHz,VOUT1=3.3V)
0.6
0.4
0.2
IOUT=1mA
1
0.8
0.6
0.4
IOUT=1mA
0.2
0
0
-40 -20
0
20
40
60
-40 -20
80 100
0
20 40 60 80 100
Ambient Temperature Ta(o C)
Ambient Temperature Ta (o C)
31
XC9502 Series
2ch. Step-up / down DC/DC Controllers
(25) Soft-Start Time 1, 2 vs. Supply Voltage
Soft-Start Time 1, 2 TSS1, 2(msec)
XC9502B092 (180kHz)
25
20
15
10
5
0
0
2
4
6
8
10
Supply Voltage VDD (V)
32
XC9502 Series
2ch. Step-up / down DC/DC Controllers
Load Transient Response
[1 channel : Step-up DC/DC Controller]
< VOUT1 = 3.3V, VIN = 2.0V
IOUT1, 2 =100µA Q 100mA >
PWM Control
FOSC=180kHz, VOUT1=3.3V
FOSC=180kHz, VOUT1=3.3V
VIN=2.0V, IOUT1=100µA→ 100mA
VIN=2.0V, IOUT1=100mA→ 100µA
CH1
3.3V
CH1
3.3V
100mA
100mA
100µA
CH2
100µA
CH2
10msec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1 , 50mA/div
200µsec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1 , 50mA/div
PWM/PFM Switching Control
CH1
FOSC=180kHz, VOUT1=3.3V
FOSC=180kHz, VOUT1=3.3V
VIN=2.0V, IOUT1=100µA→ 100mA
VIN=2.0V, IOUT1=100mA→ 100µA
3.3V
3.3V
CH1
100mA
CH2
100µA
100mA
100µA
CH2
10msec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1 , 50mA/div
200µsec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1 , 50mA/div
33
XC9502 Series
2ch. Step-up / down DC/DC Controllers ICs
Load Transient Response
[1 channel : Step-up DC/DC Controller]
< VOUT1 = 3.3V, VIN = 2.0V
IOUT1, 2 =10mA Q 100mA >
PWM Control
FOSC=180kHz, VOUT1=3.3V
FOSC=180kHz, VOUT1=3.3V
VIN=2.0V, IOUT1=10mA→ 100mA
VIN=2.0V, IOUT1=100mA→ 10mA
CH1
3.3V
CH1
3.3V
100mA
100mA
CH2
10mA
10mA
CH2
200µsec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1, 50mA/div
200µsec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1, 50mA/div
PWM/PFM Switching Control
FOSC=180kHz, VOUT1=3.3V
FOSC=180kHz, VOUT1=3.3V
VIN=2.0V, IOUT1=100mA→ 10mA
VIN=2.0V, IOUT1=10mA→ 100mA
CH1
3.3V
CH1
3.3V
100mA
CH2
10mA
100mA
CH2
10mA
200µsec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1, 50mA/div
200µsec/div
CH1:VOUT1 , AC-COUPLED, 50mV/div
CH2:IOUT1, 50mA/div
34
XC9502 Series
2ch. Step-up / down DC/DC Controllers ICs
Load Transient Response
[1 channel : Step-up DC/DC Controller]
<PWM Control D PWM/PFM Switching Control>
FOSC=180kHz, VOUT1=3.3V
FOSC=180kHz, VOUT1=3.3V
VIN=2.0V, IOUT1=1mA PWM1 ’L'J’H’
VIN=2.0V, IOUT1=1mA PWM1 ’H’J’L’
CH1
3.3V
CH1
3.3V
0.65V
0.65V
0V
CH2
CH2
1msec/div
CH1:VOUT1, AC-COUPLED ,10mV/div
CH2:PWM1, 0.5V/div
1msec/div
CH1:VOUT1 , AC-COUPLED ,10mV/div
CH2:PWM1 , 0.5V/div
<Soft Start Wave Form>
FOSC=180kHz, VOUT1=3.3V
VIN=2.0V, IOUT1=100mA EN1 ’L’J’H’
CIN=47µF
3.3V
CH1
300mA
CH2
0.65V
CH3
4ms/div
CH1:VOUT1, 1.0V/div
CH2:IIN1, 100mA/div
CH3:EN1 , 0.5V/div
0V
* EN2=GND
35
XC9502 Series
2ch. Step-up / down DC/DC Controllers ICs
Load Transient Response
[2 channel : Step-down DC/DC Controller]
< VOUT2=3.3V, VIN=5.0V
IOUT2=100µA Q 300mA>
PWM Control
FOSC=300kHz, VOUT2=3.3V
FOSC=300kHz, VOUT2=3.3V
VIN=5.0V, IOUT2=100µA→ 300mA
VIN=5.0V, IOUT2=300mA→100µA
CH1
3.3V
CH1
3.3V
300mA
100µA
CH2
300mA
100µA
CH2
200µsec/div
CH1:VOUT2 , AC-COUPLED, 100mV/div
CH2:IOUT2 , 150mA/div
10msec/div
CH1:VOUT2 , AC-COUPLED, 50mV/div
CH2:IOUT2 , 150mA/div
PWM/PFM Switching Control
FOSC=300kHz, VOUT2=3.3V
FOSC=300kHz, VOUT2=3.3V
VIN=5.0V, IOUT2=100µA→ 300mA
VIN=5.0V, IOUT2=300mA→100µA
3.3V
CH1
CH1
3.3V
300mA
300mA
100µA
100µA CH2
CH2
10msec/div
CH1:VOUT2 , AC-COUPLED, 100mV/div
CH2:IOUT2 , 150mA/div
200µsec/div
CH1:VOUT2 , AC-COUPLED, 100mV/div
CH2:IOUT2 , 150mA/div
36
XC9502 Series
2ch. Step-up / down DC/DC Controllers ICs
Load Transient Response
[2 channel : Step-down DC/DC Controller]
< VOUT2=3.3V, VIN=5.0V
IOUT2=10mA Q 300mA>
PWM Control
FOSC=300kHz, VOUT2=3.3V
FOSC=300kHz, VOUT2=3.3V
VIN=5.0V, IOUT2=10mA→ 300mA
VIN=5.0V, IOUT2=300mA→10mA
CH1
3.3V
3.3V
CH1
300mA
CH2
10mA
300mA
10mA
CH2
400µsec/div
CH1:VOUT2 , AC-COUPLED, 50mV/div
CH2:IOUT2 , 150mA/div
200µsec/div
CH1:VOUT2 , AC-COUPLED, 50mV/div
CH2:IOUT2 , 150mA/div
PWM/PFM Switching Control
FOSC=300kHz, VOUT2=3.3V
FOSC=300kHz, VOUT2=3.3V
VIN=5.0V, IOUT2=10mA→ 300mA
CH1
VIN=5.0V, IOUT2=300mA→10mA
3.3V
3.3V
CH1
300mA
10mA
CH2
300mA
10mA
CH2
200µsec/div
CH1:VOUT2 , AC-COUPLED, 100mV/div
CH2:IOUT2 , 150mA/div
200µsec/div
CH1:VOUT2 , AC-COUPLED, 50mV/div
CH2:IOUT2 , 150mA/div
37
XC9502 Series
2ch. Step-up / down DC/DC Controllers ICs
Load Transient Response
[2 channel : Step-down DC/DC Controller]
< VOUT2=0.9V, VIN=3.3V
IOUT2=100µA Q 300mA>
PWM Control
FOSC=300kHz, VOUT2=0.9V
FOSC=300kHz, VOUT2=0.9V
IN=3.3V, IOUT2=100µA→ 300mA
VIN=3.3V, IOUT2=300mA→100µA
CH1
0.9V
CH1
0.9V
300mA
CH2
300mA
100µA
CH2
100µA
200µsec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
4msec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
PWM/PFM Switching Control
FOSC=300kHz, VOUT2=0.9V
FOSC=300kHz, VOUT2=0.9V
VIN=3.3V, IOUT2=100µA→ 300mA
VIN=3.3V, IOUT2=300mA→100µA
0.9V
CH1
CH1
0.9V
300mA
300mA
CH2
100µA
CH2
100µA
4msec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
200µsec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
38
XC9502 Series
2ch. Step-up / down DC/DC Controllers ICs
Load Transient Response
[2 channel : Step-down DC/DC Controller]
< VOUT2=0.9V, VIN=3.3V
IOUT2=10mA Q 300mA>
PWM Control
FOSC=300kHz, VOUT2=0.9V
FOSC=300kHz, VOUT2=0.9V
VIN=3.3V, IOUT2=300mA→ 10mA
VIN=3.3V, IOUT2=10mA→ 300mA
CH1
0.9V
0.9V
CH1
300mA
300mA
CH2
10mA
10mA
CH2
100µsec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
100µsec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
PWM/PFM Switching Control
FOSC=300kHz, VOUT2=0.9V
FOSC=300kHz, VOUT2=0.9V
VIN=3.3V, IOUT2=10mA→ 300mA
VIN=3.3V, IOUT2=300mA→ 10mA
CH1
0.9V
CH1
0.9V
300mA
300mA
10mA
CH2
CH2
10mA
200µsec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
200µsec/div
CH1:VOUT2 , AC-COUPLED, 20mV/div
CH2:IOUT2 , 150mA/div
39
XC9502 Series
2ch. Step-up / down DC/DC Controllers ICs
Load Transient Response
[2 channel : Step-down DC/DC Controller]
<PWM Control D PWM/PFM Switching Control>
FOSC=300kHz, VOUT2=3.3V
FOSC=300kHz, VOUT2=3.3V
VIN=5.0V, IOUT2=5mA PWM2 ’L’J’H’
VIN=5.0V, IOUT2=5mA PWM2 ’H’J’L’
CH1
3.3V
CH1
3.3V
0.65V
CH2
0.65V
CH2
0V
0V
200µsec/div
CH1:VOUT2, AC-COUPLED ,20mV/div
CH2:PWM2, 0.5V/div
400µsec/div
CH1:VOUT2 , AC-COUPLED ,10mV/div
CH2:PWM2 , 0.5V/div
<Soft Start Wave Form>
FOSC=300kHz, VOUT2=3.3V
FOSC=300kHz, VOUT2=3.3V
VIN=5.0V, IOUT2=300mA EN2 ’L’→’H’
CIN=47µF
VIN=5.0V, IOUT2=100mA EN2 ’L’→’H’
CIN=47µF
3.3V
3.3V
CH1
CH1
200mA
75mA
CH2
CH2
0.65V
0.65V
CH3
CH3
4ms/div
CH1:VOUT2 , 2.0V/div
CH2:IIN2, 50mA/div
CH3:EN2 , 0.5V/div
4ms/div
CH1:VOUT2 , 2.0V/div
CH2:IIN2, 100mA/div
CH3:EN2 , 0.5V/div
* EN1=GND
40