TOREX XC9210

XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
July 4 , 2003 Ver. 3
„ APPLICATIONS
‹Synchronous Step-Down DC/DC Conrollers
‹Input Voltage Range
2.0V ~ 10V
‹Maximum Duty Cycle
‹Output Voltage Externally Set-up
‹Oscillation Frequency
300kHz (Accuracy ±15%)
‹PWM, PWM/PFM Externally Selectable
100% (TYP.)
‹Synchronous Rectification Control
‹High Efficiency
95% (TYP.)
‹Small MSOP-8A Packaging
z PDAs
z Palmtop computers
z Portable audios
z Various power supplies
„ FEATURES
„ GENERAL DESCRIPTION
The XC9210 is a synchronous PWM, PWM/PFM controller designed
for low voltage step-down DC/DC converter applications. High
efficiency is obtained through the use of a synchronous rectification
topology. Efficiencies are maximised by using the low RDSon NChannel MOSFET switch which replaces the catch diode used in
standard buck circuits.
The operation of the XC9210 series can be switched between PWM
and PWM/PFM externally using the MODE pin. In PWM/PFM mode
the XC9210 automatically switches from PWM to PFM during light
loads and high efficiencies can be achieved over a wide range of load
conditions. Output noise is reduced in PWM operation as the
frequency is fixed.
Input Voltage Range
: 2.0V ~ 10V
Output Voltage Range
: 0.9V ~ 6.0V
Can be set freely with 0.9V
(±2.0%) of reference voltage supply
and external components.
Oscillation Frequency
: 300kHz
±15%
(180kHz is available as custom)
Output Current
: More than 2A
(VIN = 5.0V, VOUT=3.3V)
The XC9210 has an 0.9V (±2.0%) internal voltage, and using
externally connected components, the output voltage can be set
freely between 0.9V to 6.0V. With an internal switching frequency of
300kHz and 180kHz (custom) smaller, low cost external components
can also be used.
Stand-By Function
: 3.0µA (MAX.)
Package
: MSOP-8A
Soft-start internally set-up
: 10 ms (internally set-up)
Soft-start time is internally set to 10msec offering protection against
in-rush currents during start-up and preventing voltage overshoot.
„ TYPICAL APPLICATION CIRCUIT
„ TYPICAL PERFORMANCE CHARACTERISTICS
 Efficiency vs. Output Current
<XC9210B093, VOUT:3.3V)
XC9210B093K (300kHz, 3.3V)
L:22µH
CDRH125
Tr1:Pch MOSFET
:CPH3308
VOUT:3.3V
Tr2:Nch MOSFET
:CPH3408
100
90
CFB
:62pF
CE
VIN:3.3V~10V
EXT1
EXT2
VDD
GND
PWM
CE
Efficiency EFFI (%)
CIN:47µF
PWM
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), CL=94uF(Tantalum)
RFB1
:200kΩ
CL:
47µFX2
FB
MODE
MODE
RFB
:75kΩ
80
VIN=5.0V
70
8.0V
60
50
40
30
20
10
PWM/PFM Switching Control
Synchronous PWM Control
0
0.1
1
1
10
100
1000
Output Current IOUT (mA)
10000
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
„ PIN CONFIGURATION
1 EXT1
EXT2 8
2 VDD
GND 7
3 PWM
4 CE
FB 6
MODE 8
MSOP-8A
(TOP VIEW)
„ PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTIONS
1
EXT 1 /
2
VDD
Supply Voltage
3
PWM
PWM/PFM Switching Pin <PWM control when connected to VDD, PWM / PFM auto switching when connected
to Ground. >
4
CE
5
MODE
Synchronous / Non-Synchronous Rectification Switching Pin <Synchronous operation when MODE pin and
PWM pin are connected to VDD, Non-Synchronous operation when MODE pin and PWM pin are connected to
Ground. Regardless of MODE pin, Non-Synchronous operation when PWM pin is connected to Ground.
6
FB
Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage can be set freely by connecting
split resistors between VOUT and Ground.>
7
GND
Ground
8
EXT 2
External Transistor Drive Pin <Connected to Low side of Nch Power MOSFET Gate>
External Transistor Drive Pin <Connected to High Side of Pch Power MOSFET Gate>
Chip Enable Pin <Connected to Ground when output is stand-by mode. Connected to VDD when output is
active. EXT/1 is high and EXT2/ is low when in stand-by mode.>
„ ORDERING INFORMATION
XC9210123456
DESIGNATOR
SYMBOL DESCRIPTION
1
2
3
B
0
9
4
2
3
K
R
L
Standard
FB Voltage
0.9V
Switching Frequency
5
6
180kHz (custom)
300kHz
Package
MSOP-8A
Embossed Tape
Standard Feed
Reverse Feed
„ PACKAGE INFORMATION
 MSPO-8A
4.90 + 0.10
3.00 + 0.10
0.53 + 0.13
0.15 +0.08
-0.02
-
O
3.00 + 0.10
+0.11
0.86
-0.10
(0.65)
0.00 ~ 0.20
+0.08
-0.02
0.30
+0.20
1.02
-0.21
0~6
2
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
„ BLOCK DIAGRAM
MODE
Synchronous,
blank logic
EXT1/
Error Amp
FB
EXT2
PWM
Comparator
+
+
PWM/PFM
Controller
-
PWM
VIN
CE
Vref=0.9V
withSoft Start,
CE
Ramp Wave
Generator,
OSC
CE to
internal circuit
GND
„ ABSOLUTE MAXIMUM RATINGS
Ta=25OC
PARAMETER
SYMBOL
RATINGS
UNITS
VDD Pin Voltage
VDD
- 0.3 ~ 12
V
FB Pin Voltage
VFB
- 0.3 ~ 12
V
CE Pin Voltage
VCE
- 0.3 ~ 12
V
PWM Pin Voltage
VPWM
- 0.3 ~ 12
V
MODE Pin Voltage
VMODE
- 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
C
- 55 ~ +125
O
C
Storage Temperature
Tstg
3
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
„ ELECTRICAL CHARACTERISTICS
XC9210B093
CONDITIONS
PARAMETER
SYMBOL
Supply Voltage
VDD
MODE = 0V
Maximum Input Voltage
VIN
MODE = 0V
Output Voltage Range(note 1)
VOUTSET
VIN ≥ 2.0V, MODE = 0V, IOUT=1mA
(FOSC = 300kHz)
MIN.
VOUT
Ta=25OC
TEST
UNITS CIRCUIT
TYP.
MAX.
2.0
-
10.0
V
1
10.0
-
-
V
1
0.9
-
VIN
V
1
Supply Current 1
IDD1
FB = 0V
-
65
120
µA
2
Supply Current 2
IDD2
FB = 1.0V
-
65
120
µA
2
Stand-by Current
ISTB
Same as IDD1, CE = 0V
-
-
3.0
µA
2
Oscillation Frequency
FOSC
FB Voltage
VFB
Minimum Operation Voltage
VINmin
Maximum Duty Ratio
MAXDTY
Minimum Duty Ratio
MINDTY
No Load, VPWM=0V
255
300
345
kHz
2
0.882
0.900
0.918
V
3
-
-
2.0
V
1
Same as IDD1
100
-
-
%
2
Same as IDD2
-
-
0
%
2
22
30
38
%
4
-
96
-
%
4
5.0
10.0
20.0
mS
4
Same as IDD1
VIN=3.0V, IOUT=10mA
PFM Duty Ratio
PFMDTY
Efficiency1 (note 2 )
EFFI
IOUT1=300mA (note 3)
Soft-Start Time
TSS
VOUT × 0.95V, CE=0V→0.65V
EXT1 "High" ON Resistance
REXTBH1
CE1 = 0, EXT1= VDD - 0.4V
-
26
37
Ω
5
EXT1 "Low" ON Resistance
REXTBL1
FB = 0V, EXT1 = 0.4V
-
19
30
Ω
5
EXT2 "High" ON Resistance
REXTBH2
EXT2 = VDD - 0.4V
-
23
31
Ω
5
EXT2 "Low" ON Resistance
REXTBL2
CE = 0V, EXT2 = VDD - 0.4V
-
19
30
Ω
5
PWM "High" Voltage
VPWMH
No Load
0.65
-
-
V
4
PWM "Low" Voltage
VPWML
No Load
-
-
0.20
V
4
MODE "High" Voltage
VMODEH
No Load
0.65
-
-
V
4
MODE "Low" Voltage
VMODEL
No Load
-
-
0.20
V
4
CE "High" Voltage
VCEH
FB = 0V
0.65
-
-
V
2
CE "Low" Voltage
VCEL
FB = 0V
-
-
0.2
V
2
PWM "High" Current
IPWMH
-
-
0.5
µA
2
2
PWM "Low" Current
IPWML
MODE "High" Current
IMODEH
MODE "Low" Current
IMODEL
CE "High" Current
ICEH
CE "Low" Current
ICEL
FB "High" Current
IFBH
PWM=0V
MODE = 0V
CE = 0V
-
-
- 0.5
µA
-
-
0.5
µA
2
-
-
- 0.5
µA
2
-
-
0.5
µA
2
-
-
- 0.5
µA
2
-
-
0.50
µA
2
- 0.50
µA
2
IFBL
FB = 1.0V
FB "Low" Current
Unless otherwise stated, VDD = 3.0V, CE = 3.0V, PWM = 3.0V, FB = 3.0V, EXT1, 2=OPEN, MODE = 3.0V, VIN=4.2V
Notes 1) Please be careful not to exceed the breakdown voltage level of the peripheral parts.
2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
3)
Tr1 : CPH3308
(SANYO)
Tr2 : CPH3408
(SANYO)
L : 22µH
CL : 16V, 47µF x 2
CIN : 16V, 47µF
(SUMIDA CDRH125)
(NICHICEMI Tantalum MCE Series)
(NICHICEMI Tantalum MCE Series)
RFB1 : 200kΩ
RFB2 : 75kΩ
CFB : 62pF
4
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
XC9210B092
CONDITIONS
(FOSC = 180kHz)
MIN.
TYP.
PARAMETER
SYMBOL
Supply Voltage
VDD
MODE = 0V
2.0
-
10.0
V
1
Maximum Input Voltage
VIN
MODE = 0V
10.0
-
-
V
1
VIN ≥ 2.0V, MODE = 0V, IOUT=1mA
MAX.
Ta=25OC
TEST
UNITS CIRCUIT
Output Voltage Range(note 1)
VOUTSET
0.9
-
VIN
V
1
Supply Current 1
IDD1
FB = 0V
-
45
105
µA
2
Supply Current 2
IDD2
FB = 1.0V
-
45
105
µA
2
2
Stand-by Current
ISTB
Same as IDD1, CE = 0V
Oscillation Frequency
FOSC
Same as IDD1
FB Voltage
VFB
Minimum Operation Voltage
VINmin
Maximum Duty Ratio
MAXDTY
Same as IDD1
Minimum Duty Ratio
MINDTY
Same as IDD2
PFM Duty Ratio
PFMDTY
No Load, VPWM=0V
Efficiency1 (note 2)
EFFI
IOUT1=300mA (note 3)
Soft-Start Time
TSS
VOUT1 × 0.95V, CE=0V→0.65V
EXT1 "High" ON Resistance
REXTBH1
VOUT
VIN=3.0V, IOUT=10mA
CE1 = 0, EXT1= VDD - 0.4V
-
-
3.0
µA
153
180
207
kHz
2
0.882
0.900
0.918
V
3
-
-
2.0
V
1
100
-
-
%
2
-
-
0
%
2
22
30
38
%
4
-
96
-
%
4
5.0
10.0
20.0
mS
4
-
26
37
Ω
5
EXT1 "Low" ON Resistance
REXTBL1
FB = 0V, EXT1 = 0.4V
-
19
30
Ω
5
EXT2 "High" ON Resistance
REXTBH2
EXT2 = VDD - 0.4V
-
23
31
Ω
5
EXT2 "Low" ON Resistance
REXTBL2
CE = 0V, EXT2 = VDD - 0.4V
-
19
30
Ω
5
PWM "High" Voltage
VPWMH
No Load
0.65
-
-
V
4
PWM "Low" Voltage
VPWML
No Load
-
-
0.20
V
4
MODE "High" Voltage
VMODEH
No Load
0.65
-
-
V
4
MODE "Low" Voltage
VMODEL
No Load
-
-
0.20
V
4
CE "High" Voltage
VCEH
FB = 0V
0.65
-
-
V
2
FB = 0V
-
-
0.20
V
2
-
-
0.50
µA
2
-
-
- 0.50
µA
2
-
-
0.50
µA
2
-
-
- 0.50
µA
2
-
-
0.50
µA
2
2
CE "Low" Voltage
VCEL
PWM "High" Current
IPWMH
PWM "Low" Current
IPWML
MODE "High" Current
IMODEH
MODE "Low" Current
IMODEL
CE "High" Current
ICEH
CE "Low" Current
ICEL
FB "High" Current
IFBH
PWM=0V
MODE = 0V
CE = 0V
-
-
- 0.50
µA
-
-
0.50
µA
2
- 0.50
µA
2
FB "Low" Current
IFBL
FB = 1.0V
Unless otherwise stated, VDD = 3.0V, CE = 3.0V, PWM = 3.0V, FB = 3.0V, EXT1,2 = OPEN, MODE = 3.0V, VIN=4.2V
Notes 1) Please be careful not to exceed the breakdown voltage level of the peripheral parts.
2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
3)
Tr1 : CPH3308
(SANYO)
Tr2 : CPH3408
(SANYO)
L : 22µH
CL : 16V, 47µF x 2
CIN : 16V, 47µF
(SUMIDA CDRH125)
(NICHICEMI Tantalum MCE Series)
(NICHICEMI Tantalum MCE Series)
RFB1 : 200kΩ
RFB2 : 75kΩ
CFB : 62pF
5
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
„ OPERATIONAL DESCRIPTION
The XC9210 series are 2 channel step-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 oscillation frequency which in turn generates the source clock.
<Ramp Wave Generator>
The Ramp Wave Generator generates a saw-tooth waveform based on outputs from the Phase Shift Generator.
<PWM Comparator>
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>
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 PWM 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 PWM 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).
<Synchronous, blank logic>
The Synchronous, blank logic circuit is to prevent penetraton of the transistor connected to EXT1 and EXT2. Synchronous can be switched between
Synchronous rectification and Non-Synchronous rectification automatically by using external signals. When the MODE pin's voltage is 0.2V or less, the
mode will be non-synchronous rectification and operations will recommence. The EXT2 pin will be kept at a lowlevel (the external N-type MOSFET will
be OFF). When the MODE pin's and PWM pin's voltage is 0.65V or more, the mode will be synchronous rectification and operations will recommence.
<Vref with Soft Start>
The reference voltage, Vref (FB pin voltage)=0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please refer to 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 CE pin is 0.2V or less, the mode will be chip disable, the channel's
operations will stop. The EXT1 pin will be kept at a highlevel (the external P-type MOSFET will be OFF) and the EXT2 pin will be kept at a lowlevel (the
external N-type MOSFET will be OFF). When CE pin is in a state of chip disable, current consumption will be no more than 3.0µA.
When the CE pin's voltage is 0.65V or more, the mode will be chip enable and operations will recommence. With soft-start, 95% of the set output
voltage will be reached within 10mS (TYP) from the moment of chip enable.
6
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
„ HOW TO USE
<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 MΩ 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]
[External Components]
VOUT
(V)
RFB11
(kΩ)
RFB12
(kΩ)
CFB1
(pF)
VOUT
(V)
RFB11
(kΩ)
RFB12
(kΩ)
CFB1
(pF)
1.2
110
330
100
2.5
390
220
33
1.5
220
330
62
2.7
360
180
33
1.8
220
220
62
3.0
560
240
24
2.0
330
270
39
3.3
200
75
62
2.2
390
270
33
5.0
82
18
160
Transistor :
 Low Input Voltage
(2.0V ≤ VIN ≤
5.0V, IOUT ≤ 2A)
EXT1: CPH6315 (Pch MOSFET : SANYO), IRLMS6702 (Pch MOSFET : IR)
EXT2: CPH3409 (Nch MOSFET : SANYO), IRLMS1902 (Pch MOSFET : IR)
 High Input Voltage (5.0V ≤ VIN ≤ 10.0V, IOUT ≤ 2A)
EXT1: CPH3308 (Pch MOSFET : SANYO), IRLMS5703 (Pch MOSFET : IR)
EXT2: CPH3408 (Nch MOSFET : SANYO), IRLMS1503 (Pch MOSFET : IR)
L:
22µH
(SUMIDA CDRH125)
CIN :
16V, 47µF
(NICHICEMI Tantalum MCE Series)
CL :
16V, 47µF x 2
(NICHICEMI Tantalum MCE Series)
SD :
CMS02
(TOSHIBA, Schottky Barrier Diode)
„ EXTERNAL COMPONENTS
 COIL
PART NUMBER
MANUFACTURER
L VALUE (µH)
CDR125-220
SUMIDA
22
SERIAL
RATED CURRENT
(A)
RESISTANCE (Ω)
36m
2.8
W x L (mm)
H (mm)
12.3 x 12.3
6.0
 INPUT / OUTPUT CAPACITANCE
PART NUMBER
MANUFACTURER
VOLTAGE (V)
CAPACITANCE
(µF)
W x L (mm)
H (mm)
16MCE476MD2
NICHICHEMI
16.0
47
4.6 x 5.8
3.2±0.2
 SCHOTTKY BARRIER DIODE
PART NUMBER
MANUFACTURER
REVERSE
CURRENT
FORWARD
CURRENT
Vfmax (V)
Irmax (A)
W x L (mm)
H (mm)
CMS02
TOSHIBA
30
3
0.4 (IF=3A)
0.5m (VR=30V)
2.4 x 4.7
0.98±0.1
 TRANSISTOR (Pch MOSFET)
PART NUMBER
MANUFACTURER
CPH6315
CPH3308
IRLMS6702
IRLMS5703
SANYO
SANYO
IR
IR
ABSOLUTE MAX. RATINGS
VDSS (V) VGSS (V)
ID (A)
±10
- 20
-3
±20
- 30
-4
±12
- 20
- 2.3
±20
- 30
- 2.3
Rds (ON)
MAX.(mΩ)
Cisss typ (pF)
VGS (off) (V)
PKG.
150 (VDS= - 4.0V)
140 (VDS= - 4.0V)
200 (VDS= - 4.5V)
400 (VDS= - 4.5V)
410 (VDC= - 10V)
560 (VDC= - 10V)
210 (VDC= - 15V)
170 (VDC= - 25V)
- 1.4 (MAX.)
- 2.4 (MAX.)
- 0.7 (MAX.)
- 1.0 (MAX.)
CPH6
CPH3
Micro6
Micro6
Rds (ON)
MAX.(mΩ)
Cisss typ (pF)
VGS (off) (V)
PKG.
42 (VDS=4.0V)
68 (VDS=4.0V)
100 (VDS=4.5V)
200 (VDS=4.5V)
630 (VDC= 10V)
480 (VDC= 10V)
300 (VDC= 15V)
210 (VDC= 25V)
1.3 (MAX.)
2.4 (MAX.)
0.7 (MAX.)
1.0 (MAX.)
CPH6
CPH3
Micro6
Micro6
 TRANSISTOR (Nch MOSFET)
PART NUMBER
MANUFACTURER
CPH3409
CHP3408
IRLMS1902
IRLMS1503
SANYO
SANYO
IR
IR
ABSOLUTE MAX. RATINGS
VDSS (V) VGSS (V)
ID (A)
±10
30
5
±20
30
5
±12
20
3.2
±20
30
3.2
7
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
„ TEST CIRCUITS
Circuit 1
Circuit 2
PNP
Tr1
L
VOUT
Tr2:Nch MOSFET
2200pF
510 Ω
SBD
VDD
RFB 1
C FB
EXT1
A
VDD
CE
V
GND
GND
PWM
EXT2
PWM
CIN
EXT2
EXT1
A
CIN
CL
A
OSC
A
RL
FB
FB
CE
MODE
A
A
OSC
A
1µF
MODE
VDD
RFB2
VPWM
VCE
VMODE
V FB
VIN
Circuit 3
Circuit 4
+
Tr1:Pch MOSFET
L
VOUT
SBD
EXT1
V DD
SBD
A
CE
A
CIN
EXT2
EXT1
A
CL
200k Ω
EXT2
62 pF
V
V
GND
PWM
CIN
V OUT
Tr2:Nch MOSFET
Tr2:Nch MOSFET
CIN
A
L
Tr1:Pch MOSFET
VDD
RL
CIN
FB
PWM
GND
CL
RL
FB
VP WM
MODE
CE
OSC
VIN
VIN
VCE
MODE
75kΩ
VMODE
Circuit 5
EXT1
V DD
A
PWM
CE
VEXT1
1µF
EXT2
GND
V CE
VDD
A
FB
MODE
V PWM
VMODE
V EX T2
VFB
Circuit 1 :
L:
22µH (SUMIDA CDRH125)
CL:
16MCE476MD2 (NIHONCHEMICON, Tantalum Type)
CIN:
16MCE476MD2 (NIHONCHEMICON, Tantalum Type)
PNP Tr 1 : 2SA1213 (TOSHIBA)
Tr 2 :
CPH3409 (SANYO)
RFB :
Please use by the conditions as below.
RFB1 + RFB2 ≤1MΩ
RFB1 / RFB2 = (Setting Output Voltage / 0.9) -1
CFB :
fztb = 1 / (2 x π x CFB x RFB1) =1kHz ~ 50kHz (12kHz usual)
Circuit 2 :
L:
22µH (SUMIDA CDRH125)
CL:
16MCE476MD2 (NIHONCHEMICON, Tantalum Type)
CIN:
16MCE476MD2 (NIHONCHEMICON, Tantalum Type)
Tr 1 :
CPH6315 (SANYO)
Tr 2 :
CPH3409 (SANYO)
Circuit 1 :
L:
22µH (SUMIDA CDRH125)
CL:
16MCE476MD2 (NIHONCHEMICON, Tantalum Type)
CIN:
16MCE476MD2 (NIHONCHEMICON, Tantalum Type)
Tr 1 :
CPH3308 (SANYO)
Tr 2 :
CPH3409 (SANYO)
8
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
„ NOTES ON USE
1. Checking for Intermittent Oscillation
The XC9210 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 and use OS-CON for the load capacitance CL. When using OS-CON for the load
capacitance and setting output voltage low, the series could produce an abnormal oscillation. In such case, please test with the actual device.
2. PWM/PFM Automatic Switching
If PWM/PFM automatic switching control is selected and the step-down ratio is high (e.g., from 10 V to 1.0 V), the control mode remains in PFM setting
over the whole load range, since the duty ratio under continuous-duty condition is smaller than the PFM duty ratio of the XC9210 series. The output
voltage's ripple voltage becomes substantially high under heavy load conditions, with the XC9210 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 abovementioned 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 XC9210 series and peripheral components within the limits of their ratings.
Reverse Current
4. Reverse Current
Reverse current is produced under the
conditions of synchronous operation and light
load (current flows from the output to the input ).
If this reverse current becomes a concern,
operate under synchronous rectification during
heavy load conditions, or move input
capacitance CIN closer to the IC to reduce the
reverse current to the power supply.
Lx
VOUT
CL
CIN
VIN
L
EXT 1
EXT 2
IC
GND
* The light load condition mentioned above means that the load current when the coil current being discontinuous at non-synchronous operation. The heavy
load condition means that the load current when the coil current being continuous at non-synchronous operation. The DC/DC simulation on the TOREX
website is useful to determine whether the coil current is non-synchronous or synchronous under your operating conditions. After the simulation, please test
with the actual device.
IL
IL
ILmax
ILmax
ILmax
Reverse
Current
0mA
0mA
ILmin
ILmin
Coil Current When Non-Synchronous
(Discontinuous Mode)
Coil Current When Synchronous
Coil Current with no reverse current
Comparison among non-synchronous operation (left), synchronous operation (center) and the coil current on a like-for-like
basis. Synchronous of the current IL< 0mA becomes reverse current.
To prevent the reverse current, operate in the condition of ILmin > 0mA (right).
5. Switching Method of Operational Mode / Control
OPERATIONAL MODE / CONTROL
PWM
MODE
'H'
'H'
Synchronous, PWM Control
'H'
'L'
Non-Synchronous, PWM Control
'L'
'H'
Non-Synchronous, PFM / PWM Automatic Switching Control
'L'
'L'
Non-Synchronous, PFM / PWM Automatic Switching Control
9
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
6. Notes on How to Select Transistor
Synchronous rectification operation prepares fixed time when switching changes so that the high side PchMOSFET and the low side NchMOSFET do
not oscillate simultaneously. Also it is designed to prevent the penetratation current when the both MOSFET oscillate at the same time. However, some
MOSFET may oscillate simultaneously and worsen efficiency. Please select MOSFET with high Vth with small input capacity on high side PchMOSFET
and the low side NchMOSFET. (When using with large current, please note that there is a tendency for ON resistance to become large when the input
capacity of MOSFET is small and Vth is high.)
CH1:EXT1
CH2:EXT2
Diode Wave
CH3:Lx
„ TYPICAL APPLICATION CIRCUIT
L
Lx Pin
Tr1:Pch MOSFET
VOUT
Tr2:Nch MOSFET
SBD
CIN
CFB
PWM
CE
EXT1
EXT2
VDD
GND
PWM
CE
RFB1
CL
FB
MODE
MODE
RFB2
VIN
10
Semiconductor Ltd.
XC9210 Series
TYPICAL PERFORMANCE CHARACTERISTCS
(1) Output Voltage vs. Output Current
FOSC=300kHz, VOUT=1.2V
Synchronous PWM Control
PWM/PFM Switching Control
Synchronous PWM Control
PWM/PFM Switching Control
1.3
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
1.4
Output Voltage VOUT (V)
Output Voltage VOUT (V)
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
1.4
1.2
1.1
VIN=2.7V,3.3V,4.2V
1.0
0.1
1.2
1.1
VIN=4.2V 5.0V
1.0
1
10
100
1000
0.1
10000
1
FOSC=300kHz, VOUT=1.8V
100
1000
10000
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
2.0
10
Output Current I OUT (mA)
Output Current I OUT (mA)
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
2.0
Synchronous PWM Control
PWM/PFM Switching Control
1.9
4.2V
Output Voltage VOUT (V)
Output Voltage VOUT (V)
8.0V 10.0V
1.3
0.9
0.9
1.8
1.7
VIN=2.7V 3.3V
1.6
1.5
8.0V 10.0V
Synchronous PWM Control
PWM/PFM Switching Control
1.9
1.8
1.7
VIN=4.2V 5.0V
1.6
1.5
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
10000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=300kHz, VOUT=3.3V
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
3.5
5.2
Synchronous PWM Control
PWM/PFM Switching Control
3.4
Output Voltage VOUT (V)
Output Voltage VOUT (V)
!
Synchronous Step-Down DC / DC Controller ICs
3.3
3.2
VIN=4.2V 5.0V 8.0V 10.0V
3.1
Synchronous PWM Control
PWM/PFM Switching Control
5.1
5.0
4.9
VIN=8.0V 10.0V
4.8
4.7
3.0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
10000
Output Current I OUT (mA)
Output Current I OUT (mA)
* Dotted arrow
PWM/PFM Switching Control Only
11
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(1) Output Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT=1.2V
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:IRLMS5703, Tr2:IRLMS1503
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:IRLMS6702, Tr2:IRLMS1902
1.4
5.2
Output Voltage VOUT (V)
Output Voltage VOUT (V)
Synchronous PWM Control
PWM/PFM Switching Control
1.3
1.2
1.1
VIN=2.7V,3.3V,4.2V
1.0
Synchronous PWM Control
PWM/PFM Switching Control
5.1
5.0
4.9
VIN=8.0V 10.0V
4.8
4.7
0.9
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
10000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.2V
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
1.4
Synchronous PWM Control
PWM/PFM Switching Control
1.3
Output Voltage VOUT (V)
Output Voltage VOUT (V)
1.4
1.2
1.1
VIN=2.7V 3.3V 4.2V
Synchronous PWM Control
PWM/PFM Switching Control
1.3
1.2
1.1
VIN=4.2V 5.0V
1.0
1.0
0.9
0.9
0.1
0.1
1
10
100
1000
1
10000
10
100
1000
10000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.8V
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
2.0
1.9
Output Voltage VOUT (V)
Output Voltage VOUT (V)
2.0
4.2V
1.8
1.7
VIN=2.7V 3.3V
Synchronous PWM Control
PWM/PFM Switching Control
1.9
1.8
1.7
VIN=4.2V 5.0V
1.6
1.6
Synchronous PWM Control
PWM/PFM Switching Control
1.5
1.5
0.1
0.1
1
10
100
1000
10000
1
10
100
1000
10000
Output Current I OUT (mA)
Output Current I OUT (mA)
* Dotted arrow
PWM/PFM Switching Control Only
12
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(1) Output Voltage vs. Output Current (Continued)
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
Output Voltage VOUT (V)
3.5
Synchronous PWM Control
PWM/PFM Switching Control
3.4
3.3
3.2
3.1
VIN=4.2V 5.0V
3.0
0.1
1
10
100
1000
10000
Output Current I OUT (mA)
13
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(2) Efficiency vs. Output Current
FOSC=300kHz, VOUT=1.2V
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
Synchronous PWM Control
100
3.3V
80
Efficiency EFFI (%)
Efficiency EFFI (%)
90
80
4.2V
70
VIN=2.7V
60
VIN=2.7V
4.2V
40
PWM/PFM Switching Control
0
50
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=300kHz, VOUT=1.2V
FOSC=300kHz, VOUT=1.2V
100
100
PWM/PFM Switching Control
5.0V
Synchronous PWM Control
5.0V
80
Efficiency EFFI (%)
90
VIN=4.2V
80
10.0V
8.0V
70
10000
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
VIN=4.2V
60
8.0V
40
10.0V
20
60
0
50
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=300kHz, VOUT=1.8V
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
10000
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
Synchronous PWM Control
PWM/PFM Switching Control
3.3V
90
80
80
Efficiency EFFI (%)
Efficiency EFFI (%)
3.3V
20
60
Efficiency EFFI (%)
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
4.2V
70
VIN=2.7V
VIN=2.7V
60
3.3V
4.2V
40
20
60
50
0
0.1
1
10
100
1000
0.1
10000
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
14
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(2) Efficiency vs. Output Current (Continued)
FOSC=300kHz, VOUT=1.8V
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
80
5.0V
80
Efficiency EFFI (%)
Efficiency EFFI (%)
PWM/PFM Swtching Control
VIN=4.2V
90
10.0V
8.0V
70
60
5.0V
60
10.0V
8.0V
20
50
0
0.1
1
10
100
1000
0.1
10000
1
100
1000
Output Current I OUT (mA)
FOSC=300kHz, VOUT=3.3V
FOSC=300kHz, VOUT=3.3V
100
Synchronous PWM Control
VIN=4.2V
80
10.0V
5.0V
Efficiency EFFI (%)
90
10000
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
Efficiency EFFI (%)
10
Output Current I OUT (mA)
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
8.0V
80
70
60
10.0
5.0V
60
8.0V
VIN=4.2V
40
20
50
PWM/PFM Switching Control
0
0.1
1
10
100
1000
10000
0.1
1
10
100
1000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=300kHz, VOUT=5.0V
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
10000
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
PWM/PFM Switching Control
90
80
10.0V
VIN=8.0V
Efficiency EFFI (%)
Efficiency EFFI (%)
VIN=4.2V
40
80
70
60
8.0V
10.0V
60
40
20
50
0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
10000
Output Current I OUT (mA)
Output Current I OUT (mA)
15
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(2) Efficiency vs. Output Current (Continued)
FOSC=300kHz, VOUT=1.2V
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:IRLMS6702, Tr2:IRLMS1902
100
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:IRLMS6702, Tr2:IRLMS1902
100
Synchronous PWM Control
3.3V
80
Efficiency EFFI (%)
Efficiency EFFI (%)
90
VIN=2.7V
80
4.2V
70
60
60
3.3V
VIN=2.7V
4.2V
40
20
PWM/PFM Switching Control
50
0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=300kHz, VOUT=5.0V
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:IRLMS5703, Tr2:IRLMS1503
10000
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:IRLMS5703, Tr2:IRLNS1503
100
100
Synchronous PWM Control
80
Efficiency EFFI (%)
Efficiency EFFI (%)
90
VIN=8.0V
80
10.0V
70
60
10.0V
VIN=8.0V
60
40
PWM/PFM Switching Control
20
50
0
0.1
1
10
100
1000
0.1
10000
1
100
1000
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.2V
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
10000
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
Synchronous PWM Control
PWM/PFM Switching Control
3.3V
90
80
Efficiency EFFI (%)
Efficiency EFFI (%)
10
Output Current I OUT (mA)
4.2V
80
VIN=2.7V
70
60
3.3V
VIN=2.7V
4.2V
40
20
60
50
0
0.1
1
10
100
1000
0.1
10000
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
16
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(2) Efficiency vs. Output Current (Continued)
FOSC=180kHz, VOUT=1.2V
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
80
VIN=4.2V
Efficiency EFFI (%)
Efficiency EFFI (%)
90
PWM/PFM Switching Control
5.0V
80
70
60
60
5.0V
VIN=4.2V
40
20
50
0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
Output Current I OUT (mA)
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.8V
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
10000
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
Synchronous PWM Control
80
VIN=2.7V
Efficiency EFFI (%)
Efficiency EFFI (%)
90
3.3V
80
4.2V
70
60
VIN=2.7V 3.3V
60
4.2V
40
PWM/PFM Switching Control
20
50
0
0.1
1
10
100
1000
0.1
10000
1
100
1000
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.8V
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
10000
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
PWM/PFM Switching Control
90
80
Efficiency EFFI (%)
Efficiency EFFI (%)
10
Output Current I OUT (mA)
VIN=4.2V
80
5.0V
70
60
VIN=4.2V
60
5.0V
40
20
50
0
0.1
1
10
100
1000
10000
0.1
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
17
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(2) Efficiency vs. Output Current (Continued)
FOSC=180kHz, VOUT=3.3V
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
80
5.0V
80
VIN=4.2V
70
Efficiency EFFI (%)
Efficiency EFFI (%)
90
10.0V
8.0V
60
60
5.0V
40
20
50
8.0V 10.0V
VIN=4.2V
PWM/PFM Switching Control
0
0.1
1
10
100
1000
0.1
10000
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
18
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(3) Ripple Voltage vs. Output Current
FOSC=300kHz, VOUT=1.2V
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
Synchronous PWM Control
PWM/PFM Switching Control
80
Ripple Voltage (mV)
Ripple Voltage (mV)
80
60
40
4.2V
VIN=2.7V 3.3V
60
40
20
4.2V
0
0.1
1
10
100
1000
10000
0.1
1
10
Output Current I OUT (mA)
100
1000
10000
Output Current I OUT (mA)
FOSC=300kHz, VOUT=1.2V
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
PWM/PFM Switching Control
Synchronous PWM Control
80
Ripple Voltage (mV)
80
Ripple Voltage (mV)
3.3V
20
0
60
40
VIN=4.2V 5.0V
8.0V
10.0V
20
10.0V
60
8.0V
5.0V
VIN=4.2V
40
20
0
0
0.1
1
10
100
1000
10000
0.1
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
FOSC=300kHz, VOUT=1.8V
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
L=22uH(CDRH125), CL=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
Synchronous PWM Control
PWM/PFM Switching Control
80
Ripple Voltage (mV)
80
Ripple Voltage (mV)
VIN=2.7V
60
40
VIN=2.7V
3.3V
4.2V
60
40
4.2V
VIN= 2.7V
3.3V
20
20
0
0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
10000
Output Current I OUT (mA)
Output Current I OUT (mA)
19
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT=1.8V
FOSC=300kHz, VOUT=1.8V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
PWM/PFM Switching Control
80
Ripple Voltage (mV)
Ripple Voltage (mV)
80
60
40
5.0V
VIN=4.2V
8.0V
10.0V
20
60
5.0V
40
0
0.1
1
10
100
1000
10000
0.1
1
Output Current I OUT (mA)
10
100
1000
10000
Output Current I OUT (mA)
FOSC=300kHz, VOUT=3.3V
FOSC=300kHz, VOUT=3.3V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
PWM/PFM Switching Control
Synchronous PWM Control
80
60
VIN=4.2V
5.0V
8.0V
Ripple Voltage (mV)
80
Ripple Voltage (mV)
10.0V
20
0
10.0V
40
20
60
VIN=4.2V
8.0V
10.0V
10
100
5.0V
40
20
0
0
0.1
1
10
100
1000
10000
0.1
1
Output Current I OUT (mA)
1000
10000
Output Current I OUT (mA)
FOSC=300kHz, VOUT=5.0V
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
PWM/PFM Switching Control
80
80
60
Ripple Voltage (mV)
Ripple Voltage (mV)
8.0V
VIN=4.2V
10.0V
VIN=8.0V
40
20
60
10.0V
VIN=8.0V
40
20
0
0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
10000
Output Current IOUT (mA)
Output Current I OUT (mA)
20
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT=1.2V
FOSC=300kHz, VOUT=1.2V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:IRLMS6702, Tr2:IRLMS1902
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:IRLMS6702, Tr2:IRLMS1902
100
100
PWM/PFM Switching Control
Synchronous PWM Control
80
Ripple Voltage (mV)
Ripple Voltage (mV)
80
60
VIN=2.7V
40
4.2V
3.3V
20
VIN=2.7V
3.3V
4.2V
60
40
20
0
0
0.1
1
10
100
1000
10000
0.1
1
10
Output Current I OUT (mA)
100
1000
10000
Output Current I OUT (mA)
FOSC=300kHz, VOUT=5.0V
FOSC=300kHz, VOUT=5.0V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:IRLMS5703, Tr2:IRLMS1503
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:IRLMS5703, Tr2:IRLMS1503
100
100
Synchronous PWM Control
PWM/PFM Switching Control
80
60
Ripple Voltage (mV)
Ripple Voltage (mV)
80
10.0V
VIN=8.0V
40
20
60
40
20
0
0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
10000
Output Current IOUT (mA)
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.2V
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
Synchronous PWM Control
80
PWM/PFM Switching Control
VIN=2.7V
3.3V
4.2V
80
Ripple Voltage (mV)
Ripple Voltage (mV)
10.0V
VIN=8.0V
60
40
20
60
4.2V
3.3V
VIN= 2.7V
40
20
0
0
0.1
1
10
100
1000
10000
0.1
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
21
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=180kHz, VOUT=1.2V
FOSC=180kHz, VOUT=1.2V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
PWM/PFM Switching Control
Synchronous PWM Control
80
Ripple Voltage (mV)
Ripple Voltage (mV)
80
VIN=4.2V
5.0V
60
40
20
60
40
20
0
0
0.1
1
10
100
1000
10000
0.1
1
Output Current I OUT (mA)
100
1000
10000
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
PWM/PFM Switching Control
Synchronous PWM Control
80
Ripple Voltage (mV)
80
Ripple Voltage (mV)
10
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.8V
60
40
VIN=2.7V
3.3V
4.2V
20
60
40
3.3V
4.2V
VIN= 2.7V
20
0
0
0.1
1
10
100
1000
10000
0.1
1
Output Current I OUT (mA)
10
100
1000
10000
Output Current I OUT (mA)
FOSC=180kHz, VOUT=1.8V
FOSC=180kHz, VOUT=1.8V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
Synchronous PWM Control
PWM/PFM Switching Control
80
80
Ripple Voltage (mV)
Ripple Voltage (mV)
5.0V
VIN=4.2V
60
5.0V
VIN=4.2V
40
20
60
5.0V
VIN=4.2V
40
20
0
0
0.1
1
10
100
1000
10000
0.1
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
22
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=180kHz, VOUT=3.3V
FOSC=180kHz, VOUT=3.3V
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH3308, Tr2:CPH3408
100
100
PWM/PFM Switching Control
Synchronous PWM Control
80
Ripple Voltage (mV)
Ripple Voltage (mV)
80
60
VIN=4.2V
8.0V
5.0V
10.0V
40
20
60
5.0V
40
10.0V
8.0V
VIN=4.2V
20
0
0
0.1
1
10
100
1000
10000
0.1
1
Output Current I OUT (mA)
10
100
1000
10000
Output Current I OUT (mA)
(4) Breakdown of Coil Inductance Value
FOSC=300kHz, VIN=5.0V VOUT=3.3V
FOSC=300Hz, VIN=5.0V VOUT=3.3V
L=CDRH125, C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
L=CDRH125, C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
100
100
Synchronous PWM Control
Synchronous PWM Control
22uH
80
Ripple Voltage (mV)
95
Efficiency EFFI (%)
10uH
90
85
68uH
80
22uH
60
10uH
68uH
40
20
75
0
0.1
1
10
100
1000
10000
0.1
Output Current I OUT (mA)
1
10
100
1000
10000
Output Current I OUT (mA)
23
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(5) Supply Current 1 vs. Supply Voltage
(6) Supply Current 2 vs. Supply Voltage
XC9210B093(300kHz)
XC9210B093(300kHz)
250
Supply Current IDD2 (uA)
Supply Current IDD1 (uA)
250
Topr=85OC
25OC
- 40OC
200
150
100
50
Topr=85OC
25OC
- 40OC
200
150
100
50
0
0
0
2
4
6
8
0
10
2
Supply Voltage VDD (V)
(7) Standby Current vs Supply Voltage
Soft start time TSS (msec)
Standby Current ISTB (uA)
O
Topr=85 C
25OC
- 40OC
4
2
0
0
2
4
6
8
20
15
10
10
5
0
0
2
PWM 'H' 'L' Voltage V PWM
(V)
CE 'H' 'L' Voltage VCE (V)
- 40OC
0.4
85OC
0
0
2
4
6
8
0.6
- 40OC
0.4
85OC
0.2
O
Topr=25 C
0
10
0
Oscillation Frequency Fosc
(kHz)
MODE 'H' 'L' Voltage VMODE
(V)
- 40OC
0.4
85OC
Topr=25OC
0
4
6
8
6
8
10
XC9210B093(300kHz)
0.8
2
4
(13) Oscillation Frequency vs. Supply Voltage
XC9210B093 (300kHz)
0
2
Supply Voltage VDD (V)
(12) MODE 'H' 'L' Voltage vs. Supply Voltage
0.2
10
0.8
Supply Voltage VDD (V)
0.6
8
XC9210B093 (300kHz)
0.8
Topr=25 C
6
(11) PWM 'H' 'L' Voltage vs. Supply Voltage
XC9210B093 (300kHz)
0.2
4
Supply Voltage VDD (V)
(10) CE 'H' 'L' Voltage vs. Supply Voltage
O
10
25
Supply Voltage VDD (V)
0.6
8
XC9210B093 (300kHz)
10
6
6
(8) Softstart Time vs. Supply Voltage
XC9210B093(300kHz)
8
4
Supply Voltage VDD (V)
360
330
85OC
300
Topr=25OC
270
- 40OC
240
0
10
2
4
6
8
10
Supply Voltage VDD (V)
Supply Voltage VDD (V)
24
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
(14) EXT 1 H ON Resistance vs. Supply Voltage
(15) EXT L ON Resisntace vs. Supply Voltage
XC9210B093(300kHz)
XC9210B093(300kHz)
EXT1 'L' ON Resistance
80
EXT1 L ON Resistance (Ω)
EXT1 H ON Resistance (Ω)
EXT1 'H' ON Resistance
Topr=85OC
25OC
- 40OC
60
40
20
0
0
2
4
6
8
80
Topr=85OC
25OC
- 40OC
60
40
20
0
0
10
2
XC9210B093(300kHz)
EXT2 L ON Resistance (Ω)
EXT2 H ON Resistance (Ω)
Topr=85OC
25OC
- 40OC
40
20
0
4
6
8
80
Topr=85OC
25OC
- 40OC
60
40
20
0
0
10
(18) Output Voltage vs. Ambient Temperature 1
6
8
10
XC9210B093(300kHz)
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
L=22uH(CDRH125), C L=94uF(Tantalum)
Tr1:CPH6315, Tr2:CPH3409
1.1
Output Voltage VOUT (V)
Output Voltage VOUT (V)
4
(19) Output Voltage vs. Ambient Temperature 2
XC9210B093(300kHz)
3.4
3.3
3.2
VIN=5.0V
IOUT=200mA
3.1
2
Supply Voltage VDD (V)
Supply Voltage VDD (V)
3.5
10
EXT2 'L' ON Resistance
80
2
8
XC9210B093(300kHz)
EXT2 'H' ON Resistance
0
6
(17) EXT2 L ON Resistance vs. Supply Voltage
(16) EXT2 H ON Resistance vs. Supply Voltage
60
4
Supply Voltage VDD (V)
Supply Voltage VDD (V)
3.0
1.0
0.9
0.8
VIN=3.3V
IOUT=200mA
0.7
0.6
-50
-20
10
40
70
100
-50
Ambient Temperature Ta ( OC)
-20
10
40
70
100
O
Ambient Temperature Ta ( C)
(20) PFM Duty Ratio vs. Supply Voltage
XC9210B093(300kHz)
PFM Duty Ratio (%)
40
35
30
Topr=85OC
25OC
- 40OC
25
20
0
2
4
6
8
10
Supply Voltage VDD (V)
25
Semiconductor Ltd.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
LOAD TRANSIENT RESPONSE
< VOUT = 3.3 V, VIN = 5.0V
IOUT = 100µA Q 300mA >
Synchronous PWM Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 100µA D 300mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA D 100µA
3.3V
CH1
3.3V
CH1
300mA
300mA
100µA
CH2
CH2
20µsec/div
CH1:VOUT, AC-COUPLED,20mV/div
CH2:IOUT, 150mA/div
100µA
20µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
PWM Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 100µA D 300mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA D 100µA
CH1
3.3V
3.3V
CH1
300mA
300mA
100µA
CH2
CH2
100µA
20µsec/div
20msec/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 150mA/div
CH1:VOUT, AC-COUPLED, 100mV/div
CH2:IOUT, 150mA/div
PWM/PFM Switching Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 100µA D 300mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA D 100µA
3.3V
CH1
CH1
3.3V
300mA
300mA
100µA
CH2
100µA
CH2
20µsec/div
20msec/div
CH1:VOUT, AC-COUPLED, 100mV/div
CH2:IOUT, 150mA/div
CH1:VOUT, AC-COUPLED, 100mV/div
CH2:IOUT, 150mA/div
26
Semiconductor Ltd.
XC9210 Series
< VOUT = 3.3 V, VIN = 5.0V
Synchronous Step-Down DC / DC Controller ICs
IOUT = 10mA Q 300mA >
Synchronous PWM Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 10mA D 300mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA D 10mA
CH1
3.3V
3.3V
CH1
300mA
300mA
10mA
CH2
10mA
CH2
10µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
20µsec/div
CH1:VOUT, AC-COUPLED,20mV/div
CH2:IOUT, 150mA/div
PWM Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 10mA D 300mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA D 10mA
3.3V
CH1
CH1
3.3V
300mA
300mA
CH2
CH2
10mA
10mA
200µsec/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 150mA/div
400µsec/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 150mA/div
PWM/PFM Switching Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 10mA D 300mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA D 10mA
3.3V
CH1
CH1
3.3V
300mA
300mA
CH2
CH2
10mA
10mA
200µsec/div
200µsec/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 150mA/div
CH1:VOUT, AC-COUPLED, 100mV/div
CH2:IOUT, 150mA/div
27
Semiconductor Ltd.
XC9210 Series
< VOUT = 3.3 V, VIN = 5.0V
Synchronous Step-Down DC / DC Controller ICs
IOUT = 100µA Q 1000mA >
Synchronous PWM Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 100µA D 1000mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 1000mA D 100µA
CH1
3.3V
CH1
3.3V
1000mA
CH2
1000mA
10µsec/div
20µsec/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 500mA/div
< VOUT = 3.3 V, VIN = 5.0V
100µA
CH2
100µA
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 500mA/div
IOUT = 10mA Q 1000mA >
Synchronus PWM Control
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 10mA D 1000mA
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 1000mA D 10mA
CH1
3.3V
3.3V
1000mA
1000mA
CH1
CH2
10mA
CH2
10mA
10µsec/div
10µsec/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 500mA/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 500mA/div
28
Semiconductor Ltd.
XC9210 Series
< VOUT = 0.9 V, VIN = 3.3V
Synchronous Step-Down DC / DC Controller ICs
IOUT = 100µA Q 300mA >
Synchronous PWM Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 300mA D 100µA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 100µA D 300mA
0.9V
CH1
CH1
0.9V
300mA
100µA
CH2
300mA
CH2
10µsec/div
100µA
20µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
PWM Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 300mA D 100µA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 100µA D 300mA
0.9V
CH1
CH1
0.9V
300mA
300mA
100µA
100µA
CH2
CH2
200µsec/div
4msec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
PWM/PFM Switching Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 300mA D 100µA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 100µA D 300mA
0.9V
CH1
CH1
0.9V
300mA
300mA
100µA
100µA
CH2
CH2
200µsec/div
10msec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
29
Semiconductor Ltd.
XC9210 Series
< VOUT = 0.9 V, VIN = 3.3V
Synchronous Step-Down DC / DC Controller ICs
IOUT = 10mA Q 300mA >
Synchronous PWM Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 300mA D 10mA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 10mA D 300mA
0.9V
CH1
CH1
0.9V
300mA
300mA
10mA
CH2
10mA
CH2
20µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
10µsec/div
CH1:VOUT, AC-COUPLED,20mV/div
CH2:IOUT, 150mA/div
PWM Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 300mA D 10mA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 10mA D 300mA
0.9V
CH1
CH1
0.9V
300mA
300mA
CH2
10mA
CH2
10mA
100µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
200µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
PWM/PFM Switching Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 300mA D 10mA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 10mA D 300mA
CH1
0.9V
0.9V
CH1
300mA
300mA
CH2
10mA
CH2
10mA
100µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
200µsec/div
CH1:VOUT, AC-COUPLED, 20mV/div
CH2:IOUT, 150mA/div
30
Semiconductor Ltd.
XC9210 Series
< VOUT = 0.9 V, VIN = 3.3V
Synchronous Step-Down DC / DC Controller ICs
IOUT = 100µA Q 1000mA >
Synchronous PWM Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 100µA D 1000mA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 1000mA D 100µA
0.9V
CH1
CH1
0.9V
1000mA
100µA
CH2
1000mA
20µsec/div
CH1:VOUT, AC-COUPLED, 100mV/div
CH2:IOUT, 500mA/div
< VOUT = 0.9 V, VIN = 3.3V
100µA
CH2
10µsec/div
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 500mA/div
IOUT = 10mA Q 1000mA >
Synchronous PWM Control
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 10mA D 1000mA
FOSC = 300kHz, VOUT = 0.9V
VIN = 3.3V, IOUT = 1000mA D 10mA
CH1
0.9V
CH1
0.9V
1000mA
1000mA
CH2
10mA
CH2
10mA
10µs/ecdiv
CH1:VOUT, AC-COUPLED, 50mV/div
CH2:IOUT, 500mA/div
20µsec/div
CH1:VOUT, AC-COUPLED, 100mV/div
CH2:IOUT, 500mA/div
31
Semiconductor Ltd.
XC9210 Series
< PWM Control
Synchronous Step-Down DC / DC Controller ICs
Q Synchronous PWM Control>
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA MODE 'H' D 'L'
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA MODE 'L' D 'H'
3.3V
CH1
3.3V
CH1
0.65V
0V
CH2
0.65V
CH2
20µsec/div
CH1:VOUT, AC-COUPLED ,20mV/div
CH2:MODE, 0.5V/div
20µsec/div
CH1:VOUT , AC-COUPLED ,20mV/div
CH2:MODE , 0.5V/div
< PWM Control
0V
Q PWM / PFM Switching Control>
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 1mA PWM 'H' D 'L'
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 1mA PWM 'L' D 'H'
3.3V
CH1
CH1
3.3V
0.65V
0.65V
0V
CH2
CH2
0V
1msec/div
CH1:VOUT, AC-COUPLED ,10mV/div
CH2:PWM, 0.5V/div
1msec/div
CH1:VOUT , AC-COUPLED ,10mV/div
CH2:PWM , 0.5V/div
< Softstart Wave Form >
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 300mA CE 'H' D 'L'
CIN=100µF
FOSC = 300kHz, VOUT = 3.3V
VIN = 5.0V, IOUT = 1000mA CE 'L' D 'H'
CIN=100µF
3.3V
3.3V
CH1
CH1
200mA
700mA
CH2
CH2
0.65V
0.65V
CH3
CH3
4ms/div
CH1:VOUT , DC-COUPLED , 2.0V/div
CH2:IIN, 100mA/div
CH3:CE , 0.5V/div
32
4ms/div
CH1:VOUT , DC-COUPLED , 2.0V/div
CH2:IIN, 500mA/div
CH3:CE , 0.5V/div
Semiconductor Ltd.