Datasheet XC9303 Datasheet (TOREX)

XC9303 Series

ETR0602_004

High Efficiency, Synchronous Step-Up & Down DC / DC Controller ICs

■GENERAL DESCRIPTION

The XC9303 series is highly efficient, synchronous PWM, PWM/PFM switchable step-up & down DC/DC controller ICs.
A versatile, large output current and high efficiency, step-up/down DC/DC controller can be realized using only basic
external components - transistors, coil, diode, capacitors, and resistors for detecting voltages. High efficiency is obtained
through the use of a synchronous rectification topology. The operation of the XC9303 series can be switched between PWM
and PWM/PFM (auto switching) externally using the PWM pin. In PWM/PFM mode, the XC9303 automatically switches
from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of output loads conditions.
Output noise can be easily reduced with PWM control since the frequency is fixed. Synchronous rectification control can be
switched to non-synchronous by using external signals (MODE pin). High efficiency can be regulated at heavy loads when
synchronous operation. The XC9303 has a 0.9V (±2.0%) internal voltage supply and using externally connected
components, output voltage can be set freely between 2.0V to 6.0V. With an internal 300kHz switching frequency smaller
external components can be used. Soft-start time is internally set to 10ms and offers protection against in-rush currents
when the power is switched on and prevents voltage overshoot.

■APPLICATIONS

●PDAs

●Palmtop computers

●Portable audios

●Various power supplies

■FEATURES

Input Voltage Range : 2.0V ~ 10V
Output Voltage Range : 2.0V ~ 6.0V

(set freely with VFB=0.9V)

Oscillation Frequency : 300kHz (±15%)
Output Current : 800mA(V
Stand-By Function : 3.0μA (MAX.)
Maximum Duty Cycle : 78% (TYP.)
High Efficiency : 84% (TYP.)
Soft-Start Time : 10ms (internally fixed)
Package : MSOP-8A

Environmentally Friendly: EU RoHS Compliant, Pb Free

■TYPICAL APPLICATION CIRCUIT

■TYPICAL PERFORMANCE

CHARACTERISTICS

●Efficiency vs. Output Current

<XC9303B093K OUTPUT= 3.3V>

Tr 1:Pch M OSF ET

:CPH 6315

PWM

CE

V IN :2.0V~10V

Tr 2:Nc h M OSFE T

:CPH 3409

CIN :47uF

EXT1

VDD

PWM

CE

EXT2

GND

CDRH127/LD

FB

NC

L:22uH

Tr 3:Nc h MO SFE T

:CPH 3409

SD:C MS02

CFB

:62pF

RFB

:200 kΩ

RFB

:75 kΩ

VOUT :3.3V

CL:

47uFX2

XC9303B093K (300kH z , V

L=2 2uH( CDRH127/LD), CL=94uF(Tantalum),SD:CMS02

100

PWM/PFM Switching Control

90

80

70

60

50

40

30

Efficiency EFFI (%)

20

10

0

0.1 1 10 100 1000 10000

☆Green Operation Compatible

IN = 4.2V, VOUT=3.3V)

=3.3V)

OUT

Tr1:CPH6315, Tr2:CPH3409, Tr3:CPH3409

VIN=2.7V

Output Current I

PW M Cont rol

OUT

4.2V

(mA )

1/20

XC9303 Series

■PIN CONFIGURATION

■PIN ASSIGNMENT

PIN NUMBER PIN NAME FUNCTIONS

■PRODUCT CLASSIFICATION

●Ordering Information

(*1)

1 EXT 1 / External Transistor Drive Pin <Connected to High Side of P-ch Power MOSFET Gate>

2 VDD Supply Voltage

3 PWM

4 CE

5 NC No Connection

6 FB

7 GND Ground

8 EXT2 External Transistor Drive Pin <Connected to Low side of N-ch Power MOSFET Gate>

XC9303①②③④⑤⑥-⑦

DESIGNATOR ITEM SYMBOL DESCRIPTION

① Type of DC/DC Controller B Standard type

②③ Output Voltage 09 FB Voltage: 0.9V

④ Oscillation Frequency 3 300kHz

⑤⑥-⑦

The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.

(*１)

1 EXT1

2 VDD

3 PWM FB 6

4 CE NC 5

EXT2 8

GND 7

MSOP-8A

(TOP VIEW)

PWM/PFM Switching Pin <PWM control when connected to V
switching when connected to Ground. >

Chip Enable Pin <Connected to Ground when output is stand-by mode. Connected to

DD when output is active. EXT/1 is high and EXT2/ is high when in stand-by mode. >

V

Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage can be set
freely by connecting split resistors between V

(*1)

Packages (Order Unit)

OUT and Ground. >

KR MSOP-8A (1,000/Reel)

KR-G MSOP-8A (1,000/Reel)

DD, PWM / PFM auto

2/20

■ BLOCK DIAGRAM

EX T1 /

■ ABSOLUTE MAXIMUM RATINGS

FB

Vref=0.9V

CE

with Soft-Start,

CE

PAR AMETER SYMBOL RATINGS UNITS

VDD Pin Voltage VDD - 0.3 ~ 12.0 V

FB Pin Voltage VFB - 0.3 ~ 12.0 V

CE Pin Voltage VEN - 0.3 ~ 12.0 V

PWM Pin Voltage VPWM - 0.3 ~ 12.0 V

Erro r Am p

+

-

CE to

inte rnal ci rcu it

EXT1, 2 Pin Voltage VEXT - 0.3 ~ VDD + 0.3 V

EXT1, 2 Pin Current IEXT ±100 mA

Power Dissipation Pd 150 mW

Operating Temperature Range Topr - 40 ~ + 85

Storage Temperature Range Tstg - 55 ~ +125

Synchronous

Blank Logic

PWM

Comparator

+

-

RampWave

Ge ne rator,

OSC

PWM/PFM

Control ler

XC9303

Series

EX T2

PWM

VIN

GND

Ta = 2 5 ℃

℃

℃

3/20

(

(

)

p

XC9303 Series

■ ELECTRICAL CHARACTERISTICS

XC9303B093

PAR AMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS

Supply Voltage VDD 2.0 - 10.0 V

Maximum Input Voltage VIN 10.0 - - V

Output Voltage Range (*1) VOUTSET

IN≧2.0V, IOUT=1mA

V

V

OUT 2.0 - 6.0 V

Supply Current 1 IDD1 FB = 0V - 90 170

Supply Current 2 IDD2 FB = 1.0V - 55 110

Stand-by Current ISTB Same as IDD1, CE = 0V - - 3.0

Oscillation Frequency FOSC Same as IDD1 255 300 345 kHz

FB Voltage VFB VIN=3.0V, IOUT=10mA 0.882 0.900 0.918 V

Minimum Operation Voltage VINmin - - 2.0 V

Maximum Duty Ratio MAXDTY Same as IDD1 72 78 88 %

Minimum Duty Ratio MINDTY Same as IDD2 - - 0 %

PFM Duty Ratio PFMDTY No Load, VPWM=0V 22 30 38 %

Efficiency (*2) EFFI IOUT1=100mA (*3) - 84 - %

Soft-Start Time TSS

OUT×0.95V, CE=0V→0.65V

V

EXT1 "High" ON Resistance REXTBH1 CE = 0, EXT1= VDD - 0.4V - 26 37

EXT1 "Low" ON Resistance REXTBL1 FB = 0V, EXT1 = 0.4V - 19 30

EXT2 "High" ON Resistance REXTBH2 EXT2 = VDD - 0.4V - 23 31

EXT2 "Low" ON Resistance REXTBL2 CE = 0V, EXT2 = VDD - 0.4V - 19 30

PWM "High" Voltage VPWMH No Load 0.65 - - V

PWM "Low" Voltage VPWML No Load - - 0.20 V

CE "High" Voltage VCEH FB = 0V 0.65 - - V

CE "Low" Voltage VCEL FB = 0V - - 0.2 V

CE "High" Current ICEH - - 0.5

CE "Low" Current ICEL CE = 0V - - - 0.5

PWM "High" Current IPWMH - - 0.5

PWM "Low" Current IPWML PWM=0V - - - 0.5

FB "High" Current IFBH - - 0.50

FB "Low" Current IFBL FB = 1.0V - - - 0.50

NOTE *1: Please be careful not to exceed the breakdown voltage level of the external components.
*2: EFFI={ [ (output voltage) x (output current) ] / [ (input voltage) x (input current) ] } x 100
*3: Tr1: CPH6315 (SANYO)

Tr2: CPH3409 (SANYO)

Tr3: CPH3409 (SANYO)
SD: CMS02 (TOSHIBA)

L: 22μH (CDRH127/LD, SUMIDA)
C
C

RFB1: 200kΩ
R
C

L: 16V, 47μF x 2 (Tantalum MCE Series, NICHICEMI)
IN: 16V, 47μF

FB2: 75kΩ
FB: 62

F

Tantalum MCE Series, NICHICEMI

FOSC = 300kHz) Ta =2 5 ℃

μA ②

μA ②

μA ②

5.0 10.0 20.0 ms

Ω ⑤

Ω ⑤

Ω ⑤

Ω ⑤

μA ②

μA ②

μA ②

μA ②

μA ②

μA ②

CIRCUIT

①

①

①

②

③

①

②

②

④

④

④

④

④

②

②

4/20

XC9303

Series

■ OPERATIONAL EXPLANATION

The XC9303 series are synchronous step-up & 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 penetration of the transistor connected to EXT1 and EXT2.

<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 next page). 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 (C
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 high level (the external P-ch MOSFET will be
OFF) and the EXT2 pin will be kept at a high level (the external N-ch MOSFET will be ON). 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.

<Output Voltage Setting>
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on
the values of R

The value of CFB1(CFB2), speed-up capacitor for phase compensation, should be fzfb= 1 / (2

to 12kHz. Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of load
capacity (C

L) from inrush current. With the Vref voltage limited and depending upon the input to the error amps, the operation

FB11 (RFB21) and RFB12 (RFB22). The sum of RFB11 (RFB21) and RFB12 (RFB22) should normally be 1 MΩor less.

OUT = 0.9

V

L).

×

( RFB11 + RFB12 ) / RFB12

×π×

CFB1×RFB11) which is equal

5/20

V

V

(

)

)

XC9303 Series

■ OPERATIONAL EXPLANATION (Continued)

<Output Voltage Setting (Continued)>

[Example of Calculation: When RFB11 = 200kΩand RFB12 = 75kΩ,

[Typical Example]

[External Components]

■EXTERNAL COMPONENTS

VOUT

(V)

RFB11

(kΩ)

RFB12

(kΩ)

2.0 330 270 39 3.3 200 75 62

2.2 390 270 33 5.0 82 18 160

2.5 390 220 33

2.7 360 180 33

3.0 560 240 24

Tr1: CPH6315 (P-ch MOSFET: SANYO), IRLMS6702 (P-ch MOSFET: IR)
Tr2: CPH3409 (N-ch MOSFET: SANYO), IRLMS1902 (N-ch MOSFET: IR)
Tr3: CPH3409 (N-ch MOSFET: SANYO), IRLMS1902 (N-ch MOSFET: IR)
Note: Vgs Breakdown Voltage of CHPH6315 and CPH3409 is 10V so please be

careful with the power supply voltage.
For the power supply voltage more than 8V, CPH3308 (P-ch MOSFET: SANYO)
or CPH3408 (N-ch MOSFET: SANYO) which breakdown voltage is 20V are
recommended.

L :

22μH

(CDRH127/LD, SUMIDA)

SD : CMS02 (Schottky Barrier Diode, TOSHIBA)

CIN :

16V, 47μF

(Tantalum MCE Series, NICHICEMI)

●COIL
PART NUMBER MANUFACTURER L VALUE (μH)

SERIAL

RESISTANCE (Ω)

CDRH127/LD-220 SUMIDA 22 36.4m 4.7 12.3 x 12.3 8

●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

CMS02 TOSHIBA 30 3 0.4 (IF=3A) 0.5m (VR=30V) 2.4 x 4.7 0.98±0.1

●TRANSISTOR

P-ch MOSFET

ABSOLUTE MAX.

PART NUMBER MANUFACTURER

RATINGS

Rds(ON) MAX.(mΩ) Ciss TYP. (pF) VGS (off) (V) PKG.

VDSS (V) VGSS (V) ID (A)
CPH6315 SANYO - 20 ±10 - 3 150 (VGS= -4.0V) 410 (VGS= -10V) -1.4 (MAX.) CPH6
CPH3308 SANYO - 30 ±20 - 4 140 (VGS= -4.0V) 560 (VGS= -10V) -2.4 (MAX.) CPH3

IRLMS6702 IR - 20 ±12 - 2.3 200 (VGS= -4.5V) 210 (VGS= -15V) -0.7 (MAX.) Micro6

●TRANSISTOR (N-ch MOSFET
PART NUMBER MANUFACTURER VDSS (V) VGSS (V) ID (A) Rds(ON) MAX.(mΩ) Ciss TYP. (pF) VGS (off) (V) PKG.

CPH3409 SANYO 30 +10 5.0 42@VGS=4.0V 630@VGS=10V 1.3 (MAX.) CPH3

CPH3408 SANYO 30 +20 5.0 68@VGS=4.0V 480@VGS=10V 2.4 (MAX.) CPH3

IRLMS1902 IR 20 +12 3.2 100@VGS=4.5V 300@VGS=15V 0.7 (MIN.) Micro6

IRLML2502 IR 20 +12 4.2 45@VGS=4.5V 740@VGS=15V 1.2 (MAX.) Micro3

OUT1 = 0.9

CFB1

(pF)

×

( 200k + 75k ) / 75k = 3.3

VOUT

(V)

RFB11

(kΩ)

RATED CURRENT

(A)

RFB12

(kΩ)

W x L (mm)

.]

CFB1

(pF)

VFmax (V) IRmax (A) W x L (mm) H (mm)

H (mm)

6/20

■TEST CIRCUITS

Circuit ①

Circuit ③

Circuit ⑤

External Components:
Circuit ①
L: 22μH (CDRH127/LD, SUMIDA)
SD: CMS02 (Schottky Barriar Diode, TOSHIBA)
CL: 16MCE476MD2 (Tantalum Type, NIHONCHEMICON)
CIN: 16MCE476MD2 (Tantalum Type, NIHONCHEMICON)
PNP Tr1: 2SA1213 (TOSHIBA)
Tr2: CPH3409 (SANYO)
Tr3: 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×CFB×RFB1) =1kHz ~ 50kHz (12kHz usual)

Circuit ③
L: 22μH (CDRH127/LD, SUMIDA)
SD: CMS02 (Schottky Barriar Diode, TOSHIBA)
CL: 16MCE476MD2 (Tantalum Type, NIHONCHEMICON)
CIN: 16MCE476MD2 (Tantalum Type, NIHONCHEMICON)
Tr1: CPH6315 (SANYO)
Tr2: CPH3409 (SANYO)
Tr3: CPH3409 (SANYO)

Circuit ④
L: 22μH (CDRH127 / LD, SUMIDA)
SD: CMS02 (Schottky Barriar Diode, TOSHIBA)
CL: 16MCE476MD2 (Tantalum Type, NIHONCHEMICON)
CIN: 16MCE476MD2 (Tantalum Type, NIHONCHEMICON)
Tr1: CPH6315 (SANYO)
Tr2: CPH3409 (SANYO)

Circuit ②

Circuit ④

XC9303

Series

7/20

XC9303 Series

■NOTES ON USE

1. 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 XC9303 series. The output voltage's ripple voltage becomes substantially high under heavy
load conditions, with the XC9303 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.

2. Ratings

Use the XC9303 series and peripheral components within the limits of their ratings.

3. Notes on How to Select Transistor
Synchronous rectification operation prepares fixed time when switching changes so that the high side P-ch MOSFET and
the low side N-ch MOSFET do not oscillate simultaneously. Also it is designed to prevent the penetration 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 P-ch MOSFET and the low side N-ch MOSFET.
(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.)

<The check method of whether selected MOSFET is oscillating simultaneously>

In order to check that MOSFET is not oscillating simultaneously, please observe Lx terminal waveform of coil current at the
time of the continuation mode. If the MOSFET parasitism diode waveform on Lx terminal waveform can be formed in the
period EXT 1 is 'H' and EXT2 is 'L', it can be thought that MOSFETs are not oscillating simultaneously.

4. Instruction on Layout
(1) The performance of the XC9303 DC/DC converter is greatly influenced by not only its own characteristics, but also by

those of the external components it is used with. We recommend that you refer to the specifications of each
component to be used and take sufficient care when selecting components.

(2) Please mount each external component as close to the IC as possible. Wire external components as close to the IC as

possible and use thick, short connecting wires to reduce wiring impedance. In particular, minimize the distance
between the EXT2 pin and the Gate pin of the low side N-ch MOSFET. It may decrease efficiency.

(3) Make sure that the GND wiring is as strong as possible as variations in ground potential caused by ground current at the

time of switching may result in unstable operation of the IC. Specifically, strengthen the ground wiring in the proximity

of the V
(4) For stable operation, please connect by-pass capacitor between the V
(5) Wiring between the GND pin of C

It may result in unstable operation of the IC.

SS pin.

DD and the GND.

IN and the Sauce pin of the low side N-ch MOSFET connect to the GND pin of the IC.

■TYPICAL APPLICATION CIRCUIT

8/20

)

)

)

)

■TYPICAL PERFORMANCE CHARACTERISTICS

(1) Output Voltage vs. Output Current

3.5

3.4

3.3

FOSC=300kHz, VOUT=3.3 V

L=22μH(CDRH127/LD), CL=94μF(Tantalum ),SD: CMS02

PWM/PF M Switching Control
PWM Contr ol

Tr1:CPH 6315, Tr2:C PH3409, Tr3: CPH3409

4.2V 5.0V

L=22μH(CDRH127/LD), CL=94μF(Tantalum ),SD: CMS02

5.2

5.1

5

PWM/PF M Switching Control
PWM Contr ol

3.2
VIN=2.7V 3.3V

Output Voltage VOUT (V)

3.1

4.9

Efficiency EFFI ( %

4.8

3.0

0.1 1 10 100 1000 10000

Output Current IOUT (mA)

3.5

3.4

3.3

3.2

Output Voltage VOUT (V)

3.1

3.0

0.1 1 10 100 1000 10000

FOSC=300kHz, VOUT=3.3V

L=22μH(CDRH127/LD), CL=94Fμ(Tantalum),SD :CMS02

Tr1:IR LMS6702, Tr2:IR LMS1902, Tr3:IR LML2502

PWM/PF M Switching Control
PWM C ontr ol

Output Current IOUT (mA)

VIN=2.7V

4.2V

4.7

0.1 1 10 100 1000 10000

(2) Efficiency vs. Output Current

L=22μH(CDRH127/LD), CL=94μF(Tantalum ),SD: CMS02

100

PWM/PFM Switching Control

90

PWM Control

80

70

60

50

40

30

Efficiency EFF I (%

20

10

0

0.1 1 10 100 1000 10000

FOSC=300kHz, VOUT=5.0 V

Tr1:CPH 6315, Tr2:C PH3409, Tr3: CPH3409

VIN=3.0V

4.2V

6.0V

Output Current IOUT (mA)

FOSC=300kHz, VOUT=3.3V

Tr1:CPH 6315, Tr2:C PH3409, Tr3:CPH 3409

VIN=2.7V

Output Current IOUT (mA )

3.3V

XC9303

Series

5.0V

4.2V

FOSC=300kHz, VOUT=5.0V

L=22μH(C DRH 127/LD ), C L=94μF(Tantalum),SD: CMS02

100

PWM/PFM Switching Control

90

PWM C ontr ol

80

70

60

50

40

30

Efficiency EFFI ( %

20

10

0

0.1 1 10 100 1000 10000

Tr1:CPH 6315, Tr2:C PH3409, Tr3:CPH 3409

VIN=3.0V

Output Current IOUT (mA )

6.0V

4.2V

100

PWM/PF M Switching Control

90

PWM C ontr ol

80

70

60

50

40

30

Efficiency EFFI (%

20

10

0

0.1 1 10 100 1000 10000

FOSC=300kHz, VOUT=3.3V

L=22μH(CDRH127/LD), CL=94μF(Tantalum ),SD: CMS02

Tr1:IR LMS6702, Tr2:IR LMS1902, Tr3:IR LML2502

4.2V

VIN=2.7V

Output Current IOUT (mA)

9/20

XC9303 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(3) Ripple Voltage vs. Output Current

10/20

FOSC=300kHz, VOUT=3.3V

L=22μH(CDRH127/LD), CL=94μF(Tantalum ),SD: CMS02

100

80

60

40

Ripple Voltage (mV)

20

0

0.1 1 10 100 1000 10000

L=22μH(CDRH127/LD), CL=94μF(Tantalum ),SD: CMS02

100

80

60

40

Ripple Voltage (mV)

20

0

0.1 1 10 100 1000 10000

L=22μH(CDRH127/LD), CL=94μF(Tantalum ),SD: CMS02

100

PWM C ontr ol

80

60

40

Ripple Volt age (mV)

20

0

0.1 1 10 100 1000 10000

Tr1:CPH 6315, Tr2:C PH3409, Tr3:CPH 3409

PWM Control

VIN=2.7V

3.3V

4.2V

5.0V

Output Curr ent IOUT ( mA)

FOSC=300kHz, VOUT=5.0V

Tr1:CPH 6315, Tr2:C PH3409, Tr3:CPH 3409

PWM C ontr ol

VIN=3.0V

4.2V

6.0V

Output Current IOUT (mA)

FOSC=300kHz, VOUT=3.3V

Tr1:IR LMS6702, Tr2:IR LMS1902, Tr3:IR LML2502

4.2V

VIN=2.7V

Output Curr ent IOUT ( mA)

100

80

60

40

Ripple Voltage (mV)

20

0

0.1 1 10 100 1000 10000

100

80

60

40

Ripple Voltage (mV)

20

0

0.1 1 10 100 1000 10000

100

80

60

40

Ripple Voltage (mV)

20

0

0.1 1 10 100 1000 10000

FOSC=300kHz, VOUT=3.3V

L=22μH(C DRH 127/LD ), C L=94μF(Tantalum ),SD: CMS02

PWM/PF M Switching Control

L=22μH(C DRH 127/LD ), C L=94μF(Tantalum ),SD: CMS02

L=22μH(C DRH 127/LD ), C L=94μF(Tantalum ),SD: CMS02

PWM/PF M Switching Control

Tr1:CPH 6315, Tr2:C PH3409, Tr3: CPH 3409

VIN=2.7V

3.3V

4.2V

5.0V

Output Curr ent IOUT ( mA)

FOSC=300kHz, VOUT=5.0V

Tr1:CPH 6315, Tr2:C PH3409, Tr3:CPH 3409

PWM/PF M Switching Control

VIN=3.0V

4.2V

6.0V

Output Current IOUT (mA)

FOSC=300kHz, VOUT=3.3V

Tr1:IR LMS6702, Tr2:IR LMS1902, Tr3:IRLML2502

4.2V

VIN=2.7V

Output Current I

OUT

(mA)

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(4) Supply Current 1 vs. Supply Voltage (5) Supply Current 2 vs. Supply Voltage

XC9303B093 (300kHz )

XC9303B093 (300kHz )

600

300

500

250

400

300

200

Supply Current 1: IDD1 (μ A)

100

0

Topr=85o C

25

-40

0246810

o

C

o

C

Supply Voltage: VDD (V)

200

150

100

50

Supply Current 2: IDD2 (μ A)

0

0246810

Topr=85o C

o

25

-40

Supply Voltage: VDD (V)

C

o

C

(6) Stand-by Current vs. Supply Voltage

(7) Soft-start Time vs. Supply Voltage

10

XC9303B093 (300kHz )

25

XC9303B093 (300kHz )

8

6

Topr=85o C

25

-40

o

o

C

C

20

15

4

10

Stand-by Current: IS TB (μA)

2

5

Soft-Start Time: TSS (msec)

Topr=85o C

25

-40

0

0246810

Supply Voltage: VDD (V)

(8) CE 'H' 'L' Voltage vs. Supply Voltage

XC9303B093 (300kHz )

0

0246810

Supply Voltage: VDD (V)

(9) PWM 'H' 'L' Voltage vs. Supply Voltage

XC9303B093 (300kHz )

0.8

0.8

(V)

0.6

CE

-40

o

C

0.4

Topr=25o C

0.2

CE 'H' 'L' Voltage: V

85o C

0

0246 810

Supply Voltage: VDD (V)

(V)

0.6

PWM

0.4

Topr=25o C

0.2

PWM 'H' 'L' Voltage: V

0

0246 810

Supply Voltage: VDD (V)

-40

85o C

XC9303

Series

o

C

o

C

o

C

11/20

)

X

XC9303 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued

(10) Maximum Duty Ratio vs. Supply Voltage

90

85

80

75

70

Max.Duty Ratio: Maxdty (%)

65

0246810

(12) EXT1 High ON Resistance vs. Supply Voltage

80

60

40

REXTBH1 (Ω)

20

EXT1 'H' ON Resistance:

0

0246810

(14) EXT2 High ON Resistance vs. Supply Voltage

80

60

）

40

RESTBH2 (Ω

20

EXT2 'H' ON Resistance:

0

0246810

XC9303B093 (300kHz )

Topr=85o C

25

-40

Supply Voltage: V

XC9303B093 (300kHz )

EXT1 'H' ON Re s istance

Supply Voltage: VDD (V)

XC9303B093 (300kHz )

EXT2 'H' ON Re s istance

Supply Voltage: VDD (V)

DD

Topr=85o C

25

-40

Topr=85o C

25

-40

(V)

o

o

o

C

o

C

o

C

o

C

C

C

(11) Oscillation Frequency vs. Supply Voltage

XC9303B093 (300kHz )

360

330

300

Topr=25o C

270

Osc illation Frequency: Fosc (kHz)

240

0246810

Supply Voltage: VDD (V)

(13) EXT1 Low ON Resistance vs. Supply Voltage

C9303B093 (300kHz)

EXT1 'L' ON Re s istance

80

60

Topr=85o C

40

REXTBL1 (Ω)

20

EXT1 'L' ON Resistance:

0

0246810

Supply Voltage: VDD (V)

25

-40

(15) EXT2 Low ON Resistance vs. Supply Voltage

XC9303B093 (300kHz )

80

60

40

RESTBL2 (Ω)

20

EXT2 'L' ON Resistance:

0

0246 810

EXT2 'L' ON Re s istance

Supply Voltage: VDD (V)

85o C

o

C

-40

o

o

Topr=85o C

25

-40

C

C

o

C

o

C

12/20

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(16) Output Voltage vs. Ambient Temperature 1 (17) Output Voltage vs. Ambient Temperature 2

3.5

3.4

3.3

3.2

XC9303B093 (300kHz )

L=22uH (CDRH127/LD), CL=94uF (Tantalum)

Tr1:CPH6315, Tr2:CPH3409,Tr3:CPH3409

VIN=5.0V
IOUT=200mA

1.1

1.0

0.9

0.8

XC9303B093 (300kHz )

L=22uH (CDRH127/LD), CL=94uF (Tantalum)

Tr1:CPH6315, Tr2:CPH3409,Tr3:CPH3409

VIN=3.3V
IOUT=200mA

3.1

Output Voltage: VOUT (V)

0.7

Output Voltage: VOUT (V)

3.0

-50 -20 10 40 70 100
Ambient Temperature: Ta (

0

C)

0.6

-50 -20 10 40 70 100
Ambient Temperaure: Ta (

(18) PFM Duty Ratio vs. Supply Voltage

40

XC9303B093 (300kHz)

35

Topr=85o C

25

-40

o

o

C

C

30

25

PFM Duty Ratio: PFMDTY (%)

20

0246810

Supply Voltage: VDD (V)

0

C)

XC9303

Series

13/20

XC9303 Series

(19) Load Transient Response

OUT1, 2 =3.3V, VIN=5.0V, IOUT1, 2 =100μA⇔100mA>

<V

●Synchronous PWM Control

CH1

CH2

●Synchronous PWM/PFM Switching Control

CH1

CH2

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=100mA→100μA

10msec/div
CH1: VOUT, AC-COUPLED,100mV/div
CH2: IOUT, 50mA/div

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=100mA→100μA

10msec/div

CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 50mA/div

3.3V

100mA

100μA

3.3V

100mA

100μA

CH1

CH2

CH1

CH2

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=100μA→100mA

3.3V

100mA

100μA

200μsec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 50mA/div

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=100μA→100mA

3.3V

100mA

100μA

200μsec/div

CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 50mA/div

14/20

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) Load Transient Response (Continued)

OUT1, 2 =3.3V, VIN=2.7V, IOUT1, 2 =100μA⇔300mA>

<V

●Synchronous PWM Control

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=300mA

CH1

CH2

10msec/div

CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 150mA/div

→

100μA

●Synchronous PWM/PFM Switching Control

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=300mA

CH1

CH2

10msec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 150mA/div

→

100μA

3.3V

300mA

100μA

3.3V

300mA

100μA

CH1

CH2

CH1

CH2

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=100μA→300mA

200μsec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 150mA/div

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=100μA

200μsec/div

CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 150mA/div

300mA

→

XC9303

Series

3.3V

300mA

100μA

3.3V

300mA

100μA

15/20

XC9303 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) Load Transient Response (Continued)

16/20

OUT1, 2 =3.3V, VIN=2.7V, IOUT1, 2 =100μA⇔300mA>

<V

●Synchronous PWM Control

FOSC=300k Hz, VOUT=3.3V

VIN=2.7V, IOUT=100mA

CH1

CH2

10msec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 50mA/div

→

100μA

●Synchronous PWM/PFM Switching Control

FOSC=300k Hz, VOUT=3.3V

VIN=2.7V, IOUT=100mA

CH1

CH2

10msec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 50mA/div

→

100μA

3.3V

100mA

100μA

3.3V

300mA

100μA

CH1

CH2

CH1

CH2

FOSC=300k Hz, VOUT=3.3V

VIN=2.7V, IOUT=100μA

200μsec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 50mA/div

FOSC=300k Hz, VOUT=3.3V

VIN=2.7V, IOUT=100μA

200μsec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 50mA/div

→

100mA

→

100mA

3.3V

100mA

100μA

3.3V

100mA

100μA

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) Load Transient Response (Continued)

<VOUT1, 2 =3.3V, VIN=2.7V, IOUT1, 2 =100μA⇔300mA>

●Synchronous PWM Control

CH1

●Synchronous PWM/PFM Switching Control

FOSC=300k Hz, VOUT=3.3V

VIN=2.7V, IOUT=300mA

10msec/div
CH1: VOUT, AC-COUPLED,100mV/div
CH2: IOUT, 150mA/div

FOSC=300k Hz, VOUT=2.7V

VIN=2.7V, IOUT=300mA

→

→

100μA

100μA

3.3V

300mA

100μA

CH1

CH2CH2

FOSC=300k Hz, VOUT=3.3V

VIN=2.7V, IOUT=100μA

200μsec/div
CH1: VOUT, AC-COUPLED, 100mV/div
CH2: IOUT, 150mA/div

FOSC=300k Hz, VOUT=2.7V

VIN=2.7V, IOUT=100μA

300mA

→

300mA

→

XC9303

Series

3.3V

300mA

100μA

CH1

CH2

10msec/div
CH1: VOUT, AC-COUPLED, 20mV/div
CH2: IOUT, 150mA/div

3.3V

300mA

100μA

CH1

CH2

3.3V

300mA

100μA

200μsec/div
CH1: VOUT, AC-COUPLED, 20mV/div
CH2: IOUT, 150mA/div

17/20

XC9303 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) Load Transient Response (Continued)

<PWM Control ⇔ PWM/PFM Switching Control>

CH1

CH2

<Soft-Start Wave Form>

CH1

CH2

CH3

18/20

FOSC=300k H, V OUT=3.3V

VIN=5.0V, IOUT=1mA PWM ’H’→’L’

CH1:VOUT , AC-COUPLED ,20mV/div
CH2:PW M , 0.3V/div

FOSC=300k Hz, VOUT=3.3V

VIN=2.7V, IOUT=300mA, CE ’L’→’H’

CH1: VOUT, DC-COUPLED, 2.0V/div
CH2: IIN, 200mA/div
CH3: CE, 0.5V/div

1msec/div

CIN=47μF

10ms/div

3.3V

0.65V

0V

3.3V

410mA

0.65V

CH1

CH2

CH1

CH2

CH3

FOSC=300k Hz, VOUT=3.3V

VIN=5.0V, IOUT=1mA PWM ’L’→’H’

CH1: VOUT, AC-COUPLED, 20mV/div
CH2: PW M, 0.3V/div

FOSC=300k Hz, VOUT=3.3V

VIN=4.2V, IOUT=300mA, CE ’L’→’H’

CH1: VOUT, DC-COUPLED, 2.0V/div
CH2: IIN, 100mA/div
CH3: CE, 0.5V/div

1msec/div

CIN=47μF

10ms/div

3.3V

0.65V

0V

3.3V

230mA

0.65V

■ PACKAGE INFORMATION

●MSOP-8A

■MARKING RULE

●MSOP-8A

① represents product series

MARK PRODUCT SERIES

6 XC9303B093Kx

② represents type of DC/DC Controller

MARK PRODUCT SERIES

B XC9303B093Kx

MSOP-8A

(TOP VIEW)

③,④ represents out FB voltage

MARK

③ ④

VOLTAGE (V) PRODUCT SERIES

0 9 0.9 XC9303B093Kx

⑤ represents oscillation frequency

MARK OSCILLATION FREQUENCY (kHz)

3 300 XC9303B093Kx

⑥ represents production lot number

0 to 9,A to Z repeated (G, I, J, O, Q, W excluded)
Note: No character inversion used

XC9303

Series

PRODUCT SERIES

19/20

XC9303 Series

1. The products and product specifications contained herein are subject to change without

notice to improve performance characteristics. Consult us, or our representatives

before use, to confirm that the information in this datasheet is up to date.

2. We assume no responsibility for any infringement of patents, patent rights, or other

rights arising from the use of any information and circuitry in this datasheet.

3. Please ensure suitable shipping controls (including fail-safe designs and aging

protection) are in force for equipment employing products listed in this datasheet.

4. The products in this datasheet are not developed, designed, or approved for use with

such equipment whose failure of malfunction can be reasonably expected to directly

endanger the life of, or cause significant injury to, the user.

(e.g. Atomic energy; aerospace; transport; combustion and associated safety

equipment thereof.)

5. Please use the products listed in this datasheet within the specified ranges.

Should you wish to use the products under conditions exceeding the specifications,

please consult us or our representatives.

6. We assume no responsibility for damage or loss due to abnormal use.

7. All rights reserved. No part of this datasheet may be copied or reproduced without the

prior permission of TOREX SEMICONDUCTOR LTD.

20/20