XCL208_技术文档

XCL208/XCL209 Series

ETR28003-001a

400mA Inductor Built-in Step-Down “micro DC/DC” Converters

☆GreenOperation Compatible

■GENERAL DESCRIPTION

The XCL208/XCL209 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in

one tiny package (2.5mm×2.15mm, h=1.05mm). A stable power supply with an output current of 400mA is configured using only

two capacitors connected externally.

An internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring.

A wide operating voltage range of 1.8V (2.0V) to 6.0V enables support for applications that require an alkaline battery (2-cell) or

AC adapter (5V) power supply. An internally fixed output voltage (0.8V to 4.0V) or an externally set output voltage can be selected.

The XCL208/XCL209 series uses synchronous rectification at an operating frequency of 3.0MHz. PWM control (XCL208) or

automatic PWM/PFM switching control (XCL209) can be selected. The XCL208 series has a fixed frequency, enabling the

suppression of output ripple. The XCL209 series achieves high efficiency while holding down output ripple across the full range of

loads, from light to heavy, enabling the extension of battery operation time.

Soft start and on/off functions with C_Ldischarge are provided, and the IC can be put in the standby state by inputting a Low level

signal into the CE pin.

■FEATURES

■APPLICATIONS

●Mobile phones, Smart phones

●Bluetooth Headsets

●Tablet PCs

Input Voltage

: 1.8V ~ 6.0V (Type F)

: 2.0V ~ 6.0V (Type A/B)

: 0.8V ~ 4.0V (±2.0%)

: 90% (V_IN=4.2V, V_OUT=3.3V)

: 400mA

Fixed Output Voltage

High Efficiency

●PND

Output Current

●PC peripheral devices

●DSC, Camcorders

Oscillation Frequency

CE Function

: 3.0MHz (±15%)

: Active High

Soft-start Circuit Built-in

C_LHigh Speed Auto Discharge

: Current Limiter Built-in

(Constant Current & Latching)

: PWM (XCL208)

Protection Circuits

Control Methods

■TYPICAL APPLICATION CIRCUIT

PWM/PFM (XCL209)

Operating Ambient Temperature : -40℃～+85℃

Package

: USP-10B03

Environmentally Friendly

: EU RoHS Compliant, Pb Free

■TYPICAL PERFORMANCE

CHARACTERISTICS

●Efficiency vs. Output Current

XCL208x333DR/XCL209x333D

XCL208A / XCL208B / XCL209A / XCL209B Type

100

XCL209(PWM/PFM)

80

60

V_IN= 4.2V

40

5.0V

XCL208(PWM)

V_OUT=3.3V

20

0

0.01

0.1

1

10

100

1000

Output Current:I_OUT(mA)

XCL208F / XCL209F Type

1/22

XCL208/XCL209 Series

■BLOCK DIAGRAM

1)XCL208A / XCL209A Type

2) XCL208B / XCL209B Type

L1

L2

L1

L2

V_OUT

L_X

V_IN

PV_SS

AV_SS

CE

3)XCL208F / XCL209F Type

L1

L2

FB

L_X

V_IN

PV_SS

AV_SS

CE

NOTE:

The XCL208 offers a fixed PWM control, a signal from CE Control Logic to PWM/PFM Selector is fixed to "L" level inside. The XCL209 control

scheme is PWM/PFM automatic switching, a signal from CE Control Logic to PWM/PFM Selector is fixed to "H" level inside. The diodes placed

inside are ESD protection diodes and parasitic diodes.

2/22

XCL208/XCL209

Series

■PRODUCT CLASSIFICATION

XCL208①②③④⑤⑥ Fixed PWM

XCL209①②③④⑤⑥ PWM/PFM Auto Switching

DESIGNATOR

ITEM

Type

SYMBOL

A

DESCRIPTION

V_IN≧2.0V Fixed Output Voltage

Standard soft-start , No C_Lauto discharge

V_IN≧2.0V Fixed Output Voltage

①

B

F

C_Lauto discharge, High speed soft-start

V_IN≧1.8V Output Voltage External Setting

C_Lauto discharge, High speed soft-start

10

12

15

18

25

28

2L

30

33

08

3

1.0V

1.2V

1.5V

1.8V

2.5V

②③

Output Voltage ^(*1)

2.8V

2.85V

3.0V

3.3V

External Setting 0.8V (XCL208F/XCL209F)

3.0MHz

④

Oscillation Frequency

Package (Order Unit)

(*2)

⑤⑥

DR

USP-10B03 (3,000/Reel)

^(*1)When other output voltages (semi-custom) are needed, please contact your local Torex sales office for more information.

Output voltage range is 0.8~4.0V.

^(*2)Halogen free and RoHS compliant.

3/22

XCL208/XCL209 Series

■PIN CONFIGURATION

VIN 8

L1

9

PVSS

LX

1

2

NC

CE

7

6

3

4

NC

10

AVSS 5

VOUT

L2

(BOTTOM VIEW)

■PIN ASSIGNMENT

PIN NUMBER

PIN NAME

FUNCTIONS

USP-10B03

PVSS

LX

1

2

3

(Power) Ground

Switching Output

No Connection

NC

FB

Output Voltage Sense Pin (Type F)

4

VOUT

AVSS

CE

Fixed Output Voltage Pin (Type A/B)

(Analog) Ground

5

6

Active High Enable

No Connection

NC

7

VIN

L1

8

Power Supply Input

Inductor Electrodes

9

L2

10

■FUNCTION

PIN NAME

SIGNAL

CONDITIONS

AV_SS≦V_CE≦0.25V

0.65V≦V_CE≦6V

STATUS

L

Stand-by

Active

CE

H

* When the CE pin is left open, the IC may operate unstable. Please do not leave the CE pin open.

■ABSOLUTE MAXIMUM RATINGS

Ta=25℃

PARAMETER

SYMBOL

RATINGS

UNITS

Input Voltage

Lx Pin Voltage

V_IN

V_Lx

-0.3～6.5

-0.3～V_IN+0.3≦6.5

-0.3～6.5

V

Output Voltage

V_OUT

V_CE

I_LX

V

CE Input Voltage

-0.3～6.5

V

Lx Pin Current

±1500

mA

mW

℃

Power Dissipation ^(*1)

Operating Ambient Temperature

Storage Temperature

Pd

500

Topr

Tstg

-40～+85

-40～+125

Each voltage rating uses the V_SSpin as a reference.

^(*1)The value is an example data which is taken with the PCB mounted.

4/22

XCL208/XCL209

Series

■ELECTRICAL CHARACTERISTICS

Ta=25℃

1) XCL208Axx3DR/XCL209Axx3DR

PARAMETER

Output Voltage

SYMBOL

V_OUT

CONDITIONS

MIN.

TYP.

MAX.

<E-3>

6.0

UNIT

V

CIRCUIT

When connected to external components,

V_IN=V_CE=5.0V, I_OUT=30mA

<E-1> <E-2>

①

Operating Voltage Range

V_IN

2.0

-

V

V_IN=V_OUT(T)+2.0V, V_CE=1.0V,

Maximum Output Current

UVLO Voltage

I_OUTMAX

400

-

mA

V

①

③

When connected to external components ^(*8)

V_CE=V_IN, V_OUT=0V, Voltage which Lx pin holding

“L” level ^(*1),(*10)

V_UVLO

1.00

1.40

1.78

Supply Current (XCL208)

Supply Current (XCL209)

Stand-by Current

-

46

21

0

65

35

1

I_DD

I_STB

f_OSC

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×1.1

μA

②

①

V_IN=5.0V, V_CE=0V, V_OUT=V_OUT(T)×1.1

When connected to external components,

V_IN=V_OUT(T)+2.0V, V_CE=1.0V, I_OUT=100mA

Oscillation Frequency

2.55

3.00

3.45

MHz

When connected to external components,

V_IN=V_OUT(T)+2.0V, V_CE=V_IN, I_OUT=1mA

PFM Switching Current ^(*11)

I_PFM

<E-4> <E-5>

<E-6>

mA

⑩

PFM Duty Limit ^(*11)

Maximum Duty Cycle

Minimum Duty Cycle

DTY_{LIMIT_PFM}V_CE=V_IN=<C-1>, I_OUT=1mA

-

100

-

200

300

%

①

③

D_MAX

D_MIN

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×0.9

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×1.1

-

0

When connected to external components,

V_CE=V_IN=V_OUT(T)+1.2V, I_OUT=100mA

Efficiency ^(*2)

EFFI

-

<E-7>

-

%

①

L_XSW "H" ON Resistance 1

L_XSW "H" ON Resistance 2

L_XSW "L" ON Resistance 1

L_XSW "L" ON Resistance 2

R_LxH1

R_LxH2

R_LxL1

R_LxL2

V_IN=V_CE=5.0V, V_OUT=0V, I_LX=100mA ^(*3)

V_IN=V_CE=3.6V, V_OUT=0V, I_LX=100mA ^(*3)

V_IN=V_CE=5.0V ^(*4)

-

0.35

0.42

0.45

0.52

0.55

0.67

0.65

0.77

Ω

④

-

V_IN=V_CE=3.6V ^(*4)

-

L_XSW "H" Leakage Current ^(*5)

I_LeakH

V_IN=V_OUT=5.0V, V_CE=0V, V_LX=0V

-

0.01

1.00

μA

⑤

L_XSW "L" Leakage Current ^(*5)

I_LeakL

V_IN=V_OUT=5.0V, V_CE= 0V, V_LX=5.0V

-

600

-

0.01

800

1.00

1000

-

μA

⑤

⑥

①

Current Limit ^(*9)

Output Voltage Temperature

Characteristics

I_LIM

ΔV_OUT

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×0.9V ^(*7)

I_OUT=30mA,

mA

/

±100

ppm/

V

℃

(V_OUT

･

ΔTopr) -40℃≦Topr≦85℃

V_OUT=0V, Applied voltage to V_CE

,

CE "H" Voltage

CE "L" Voltage

V_CEH

0.65

V_SS

-

V_IN

③

Voltage changes Lx to “L” level ^(*10)

V_OUT=0V, Applied voltage to V_CE,

Voltage changes Lx to “L” level ^(*10)

V_CEL

0.25

V

CE "H" Current

CE "L" Current

I_CEH

I_CEL

V_IN=V_CE= 5.0V, V_OUT=0V

-0.1

-

0.1

μA

⑤

V_IN=5.0V, V_CE=0V, V_OUT=0V

When connected to external components,

V_CE=0V→V_IN, I_OUT=1mA

Soft-start Time

Latch Time

t_SS

0.5

1

0.90

-

2.50

20

ms

①

⑦

V_IN=V_CE=5.0V, V_OUT=0.8×V_OUT(T)

Short Lx at 1Ω resistance ^(*6)

Sweeping V_OUT, V_IN=V_CE=5.0V,

,

t_LAT

Short Protection Threshold Voltage

V_SHORT

<E-8> <E-9> <E-10>

V

⑦

Short Lx at 1Ω resistance, V_OUTvoltage which

Lx becomes “L” level within 1ms

Test Frequency=1MHz

Inductance Value

L

-

1.5

-

μH

-

Allowed Inductor Current

I_DC

ΔT=+40℃

700

mA

Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(T)=Nominal Voltage

NOTE:

^(*1)Including hysteresis operating voltage range.

^(*2)EFFI={ (output voltage×output current) / (input voltage×input current) }×100

^(*3)ON resistance (Ω)=(VIN - Lx pin measurement voltage) / 100mA

^(*4)Design value

^(*5)When temperature is high, a current of approximately 10μA (maximum) may leak.

^(*6)Time until it short-circuits VOUT with GND via 1Ω of resistor from an operational state and is set to Lx=0V from current limit pulse generating.

^(*7)When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.

^(*8)When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

^(*9)Current limit denotes the level of detection at peak of coil current.

^(*10)“H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V

^(*11)IPFM and DTY_{LIMIT_PFM}are defined only for the XCL209 series.

5/22

XCL208/XCL209 Series

■ELECTRICAL CHARACTERISTICS (Continued)

Ta=25℃

2) XCL208Bxx3DR/XCL209Bxx3DR

PARAMETER

SYMBOL

CONDITIONS

When connected to external components,

V_IN=V_CE=5.0V, I_OUT=30mA

MIN.

<E-1>

2.0

TYP.

<E-2>

-

MAX.

<E-3>

6.0

UNIT CIRCUIT

Output Voltage

V_OUT

V

①

Operating Voltage Range

V_IN

V_IN=V_OUT(T)+2.0V, V_CE=1.0V,

Maximum Output Current

UVLO Voltage

I_OUTMAX

V_UVLO

400

-

mA

V

①

③

When connected to external components ^(*8)

V_CE=V_IN, V_OUT=0V,

1.00

1.40

1.78

Voltage which Lx pin holding “L” level ^(*1),(*10)

Supply Current (XCL208)

Supply Current (XCL209)

Stand-by Current

-

46

21

0

65

35

1

I_DD

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×1.1

μA

②

I_STB

V_IN=5.0V, V_CE=0V, V_OUT=V_OUT(T)×1.1

When connected to external components,

V_IN=V_OUT(T)+2.0V, V_CE=1.0V, I_OUT=100mA

Oscillation Frequency

f_OSC

2.55

3.00

3.45

MHz

mA

①

⑩

When connected to external components,

V_IN=V_OUT(T)+2.0V, V_CE=V_IN, I_OUT=1mA

PFM Switching Current ^(*11)

I_PFM

<E-4>

<E-5>

<E-6>

PFM Duty Limit ^(*11)

Maximum Duty Cycle

Minimum Duty Cycle

DTY_{LIMIT_PFM}V_CE=V_IN=<C-1>, I_OUT=1mA

-

100

-

200

-

300

-

0

%

①

③

D_MAX

D_MIN

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×0.9

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×1.1

When connected to external components,

V_CE=V_IN=V_OUT(T)+1.2V, I_OUT=100mA

Efficiency ^(*2)

EFFI

-

<E-7>

-

%

①

L_XSW "H" ON Resistance 1

L_XSW "H" ON Resistance 2

L_XSW "L" ON Resistance 1

L_XSW "L" ON Resistance 2

R_LxH1

R_LxH2

R_LxL1

R_LxL2

V_IN=V_CE=5.0V, V_OUT=0V, I_LX=100mA ^(*3)

V_IN=V_CE=3.6V, V_OUT=0V, I_LX=100mA ^(*3)

V_IN=V_CE=5.0V ^(*4)

-

0.35

0.42

0.45

0.52

0.55

0.67

0.65

0.77

Ω

④

-

V_IN=V_CE=3.6V ^(*4)

-

L_XSW "H" Leakage Current ^(*5)

Current Limit ^(*9)

I_LeakH

V_IN=V_OUT=5.0V, V_CE=0V, V_LX=0V

V_IN=V_CE=5.0V, V_OUT=V_OUT(T)×0.9V ^(*7)

I_OUT=30mA, -40℃≦Topr≦85℃,

-

600

-

0.01

800

1.00

1000

-

μA

⑨

⑥

①

I_LIM

ΔV_OUT

mA

Output Voltage Temperature

Characteristics

/

±100

ppm/℃

(V_OUT

･

ΔTopr)

V_OUT=0V, Applied voltage to V_CEVoltage

changes Lx to “L” level

CE "H" Voltage

CE "L" Voltage

V_CEH

0.65

V_SS

-

V_IN

V

③

*10

）

（

V_OUT=0V, Applied voltage to V_CEVoltage

V_CEL

0.25

*10

）

（

changes Lx to “L” level

V_IN=V_CE=5.0V, V_OUT=0V

-

CE "H" Current

CE "L" Current

I_CEH

I_CEL

-0.1

-

0.1

μA

⑤

V_IN=5.0V, V_CE=0V, V_OUT=0V

When connected to external components,

V_CE=0V→V_IN, I_OUT=1mA

Soft-start Time

Latch Time

t_SS

-

<E-11> <E-12>

ms

①

⑦

V_IN=V_CE=5.0V, V_OUT=0.8×V_OUT(T)

Short Lx at 1Ω resistance^(*6)

Sweeping V_OUT, V_IN=V_CE=5.0V,

,

t_LAT

1

-

20

Short Protection Threshold Voltage

V_SHORT

<E-8>

<E-9>

<E-10>

V

⑦

Short Lx at 1Ω resistance, V_OUTvoltage which

Lx becomes “L” level within 1ms

CL Discharge

R_DCHG

V_IN=5.0V, L_X=5.0V, V_CE=0V, V_OUT=Open

200

300

450

Ω

⑧

Inductance Value

Allowed Inductor Current

L

I_DC

Test Frequency=1MHz

ΔT=+40℃

-

1.5

700

-

μH

mA

-

Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T)=Nominal Voltage

NOTE:

^(*1)Including hysteresis operating voltage range.

^(*2)EFFI={ ( output voltage×output current ) / ( input voltage×input current) }×100

^(*3)ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA

^(*4)Design value

^(*5)When temperature is high, a current of approximately 10μA (maximum) may leak.

^(*6)Time until it short-circuits VOUT with GND via 1Ω of resistor from an operational state and is set to Lx=0V from current limit pulse generating.

^(*7)When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.

^(*8)When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

^(*9)Current limit denotes the level of detection at peak of coil current.

^(*10)“H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V

^(*11)IPFM and DTY_{LIMIT_PFM}are defined only for the XCL209 series which have PFM control function. (Not for the XCL 208 series)

6/22

XCL208/XCL209

Series

■ELECTRICAL CHARACTERISTICS (Continued)

Ta=25℃

3) XCL208F083DR/XCL209F083DR

PARAMETER

FB Voltage

SYMBOL

V_FB

CONDITIONS

MIN.

TYP.

MAX.

0.816

UNIT

V

CIRCUIT

V_IN=V_CE=5.0V, V_FBvoltage which Decrease

V_FBfrom 0.9V, Lx becomes “L” ^(*10)level

0.784

0.800

③

Operating Voltage Range

Maximum Output Current

V_IN

1.8

-

6.0

-

V

①

V_IN=3.2V, V_CE=1.0V,

I_OUTMAX

400

mA

When connected to external components ^(*8)

V_CE=V_IN, V_FB=0.4V,

Voltage which Lx pin holding “L” level ^{(*1), (*10)}

UVLO Voltage

V_UVLO

1.00

1.40

1.78

V

③

Supply Current (XCL208)

Supply Current (XCL209)

Stand-by Current

-

46

21

0

65

35

I_DD

I_STB

f_OSC

V_IN=V_CE= 5.0V, V_FB=0.88V

μA

②

③

①

V_IN=5.0V, V_CE=0V, V_FB=0.88V

1.0

When connected to external components,

V_IN=3.2V, V_CE=1.0V, I_OUT=100mA

Oscillation Frequency

2.55

3.00

3.45

MHz

When connected to external components,

V_IN=3.2V, V_CE= V_IN, I_OUT=1mA

PFM Switching Current ^(*11)

I_PFM

<E-4>

<E-5>

<E-6>

mA

⑩

PFM Duty Limit ^(*11)

Maximum Duty Cycle

Minimum Duty Cycle

DTY_{LIMIT_PFM}V_IN=V_CE=2.2V, I_OUT=1mA

-

100

-

200

300

%

①

③

MAXDTY

MINDTY

V_IN=V_CE=5.0V, V_FB=0.72V

V_IN=V_CE=5.0V, V_FB=0.88V

-

0

When connected to external components,

V_CE=V_IN=2.4V, I_OUT=100mA

Efficiency ^(*2)

EFFI

-

<E-7>

-

%

①

L_XSW "H" ON Resistance 1

L_XSW "H" ON Resistance 2

L_XSW "L" ON Resistance 1

L_XSW "L" ON Resistance 2

R_LxH1

R_LxH2

R_LxL1

R_LxL2

V_IN=V_CE=5.0V, V_FB=0.72V, I_LX=100mA ^(*3)

V_IN=V_CE=3.6V, V_FB=0.72V, I_LX=100mA ^(*3)

V_IN=V_CE=5.0V ^(*4)

-

0.35

0.42

0.45

0.52

0.55

0.67

0.65

0.77

Ω

④

-

V_IN=V_CE=3.6V ^(*4)

-

LX SW "H" Leakage Current ^(*5)

I_LeakH

V_IN=V_FB=5.0V, V_CE=0V, V_LX=0V

V_IN=V_CE=5.0V, V_FB=0.72V ^(*7)

I_OUT=30mA, -40℃≦Topr≦85℃,

-

600

-

0.01

800

1.00

1000

-

μA

mA

⑨

⑥

①

PFM Duty Limit ^(*9)

Output Voltage Temperature

Characteristics

I_LIM

ΔV_OUT

(V_OUTΔTopr)

/

±100

ppm/

V

℃

･

V_FB=0.72V, Applied voltage to V_CE

Voltage changes L_Xto “L” level ^(*10)

V_FB=0.72V, Applied voltage to V_CE

,

CE "H" Voltage

CE "L" Voltage

V_CEH

0.65

V_SS

-

V_IN

③

,

V_CEL

0.25

V

Voltage changes L_Xto “L” level ^(*10)

CE "H" Current

CE "L" Current

I_CEH

I_CEL

V_IN=V_CE=5.0V, V_FB=0.72V

-0.1

-

0.1

μA

⑤

V_IN=5.0V, V_CE=0V, V_FB=0.72V

When connected to external components,

V_CE=0V→V_IN, I_OUT=1mA

Soft-start Time

Latch Time

t_SS

-

0.25

-

0.40

20

ms

①

⑦

V_IN=V_CE=5.0V, V_FB=0.64V,

t_LAT

1

Short Lx at 1Ω resistance^(*6)

V_IN=V_CE=5.0V, V_FBvoltage which Decrease

V_FBfrom 0.9V, Lx becomes “L” ^(*10)level

V_IN=5.0V, L_X=5.0V, V_CE=0V, V_FB=Open

Test Frequency=1MHz

Short Protection Threshold Voltage

V_SHORT

0.150

0.200

0.250

V

⑦

C_LDischarge

Inductance Value

R_DCHG

L

200

300

1.5

450

Ω

⑧

-

μH

mA

Allowed Inductor Current

I_DC

ΔT=40℃

700

-

Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(T)=Nominal Voltage, and the order of voltage application is V_FB→V_IN→V_CE

NOTE:

^(*1)Including hysteresis operating voltage range.

^(*2)EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100

^(*3)ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA

^(*4)Design value

^(*5)When temperature is high, a current of approximately 10μA (maximum) may leak.

^(*6)Time until it short-circuits VOUT with GND via 1Ω of resistor from an operational state and is set to Lx=0V from current limit pulse generating.

^(*7)When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.

^(*8)When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

^(*9)Current limit denotes the level of detection at peak of coil current.

^(*10)“H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V

^(*11)IPFM and DTY_{LIMIT_PFM}are defined only for the XCL209 series which have PFM control function.

7/22

XCL208/XCL209 Series

■ELECTRICAL CHARACTERISTICS (Continued)

PFM

V_OUT(V)

I_PFM(mA)

EFFI (%)

V_SHORT(ms)

tss (ms)

TYP. MAX.

Duty

V_OUT

MIN.

TYP.

MAX.

MIN.

TYP.

MAX.

TYP.

MIN.

TYP. MAX.

V_IN(V)

<C-1> <E-1> <E-2> <E-3> <E-4> <E-5> <E-6>

<E-7>

79

<E-8> <E-9> <E-10> <E-11> <E-12>

1.00

1.20

1.50

1.80

2.50

2.80

2.85

3.00

3.30

2.0V

2.20

2.50

2.80

3.50

3.80

3.85

4.00

4.30

0.980 1.000 1.020

1.176 1.200 1.224

1.470 1.500 1.530

1.764 1.800 1.836

2.450 2.500 2.550

2.744 2.800 2.856

2.793 2.850 2.907

2.940 3.000 3.060

3.234 3.300 3.366

190

180

170

260

240

220

350

300

270

0.375 0.500

0.450 0.600

0.563 0.750

0.675 0.900

0.938 1.250

1.050 1.400

1.069 1.425

1.125 1.500

1.238 1.650

0.625

0.750

0.938

1.125

1.563

1.750

1.781

1.875

2.063

0.25

0.32

0.40

0.50

82

84

85

86

The output voltage can be set by adding external dividing resistors. The output voltage is determined by R1 and R2 in the

equation below. The sum of R1 and R2 is normally kept 1MΩ or less. The output voltage range can be set from 0.9V to 6.0V

based on the 0.8V ±2.0% reference voltage source.

Note that when the input voltage (V_IN) is less than or equal to the set output voltage, an output voltage (V_OUT) higher than the

input voltage (V_IN) cannot be output.

V_OUT=0.8×(R1+R2)/R2

Adjust the value of the phase compensation speedup capacitor C_FBso that fzfb=1/(2×π×C_FB×R1) is 10kHz or less. It is

optimum to adjust to a value from 1kHz to 20kH based on the components used and the board layout.

[Calculation example]

When R1=470kΩ, R2=150kΩ, V_OUT=0.8×(470k+150k)/150k=3.3V

e.g.

V_OUT(V)

Circuit (XCL208F/XCL209F Type)

R1 (kΩ)

100

R2 (kΩ)

820

300

150

240

120

150

30

C_FB(pF)

150

0.9

1.2

1.5

1.8

2.5

3.0

3.3

4.0

150

100

130

220

300

150

510

100

330

150

470

100

120

470

8/22

XCL208/XCL209

Series

■TEST CIRCUITS

9/22

XCL208/XCL209 Series

■OPERATIONAL DESCRIPTION

The XCL208/XCL209 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator,

phase compensation circuit, output voltage adjustment resistors, P-ch MOSFET driver transistor, N-ch MOSFET switching

transistor for the synchronous switch, current limiter circuit, UVLO circuit with control IC, and an inductor. (See the block

diagram below.) Using the error amplifier, the voltage of the internal voltage reference source is compared with the feedback

voltage from the V_OUTpin through split resistors, R1 and R2. Phase compensation is performed on the resulting error amplifier

output, to input a signal to the PWM comparator to determine the turn-on time during PWM operation. The PWM comparator

compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and

delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle.

This process is continuously performed to ensure stable output voltage. The current feedback circuit monitors the P-ch MOS

driver transistor current for each switching operation, and modulates the error amplifier output signal to provide multiple

feedback signals. This enables a stable feedback loop even when a low ESR capacitor such as a ceramic capacitor is used

ensuring stable output voltage.

Type A

L1

L2

V_OUT

L_X

V_IN

PV_SS

AV_SS

CE

The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.

The ramp wave circuit determines switching frequency. The frequency is fixed internally 3.0MHz. Clock pulses generated in

this circuit are used to produce ramp waveforms needed for PWM operation, and to synchronize all the internal circuits.

The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback

(Type F: FB pin voltage) divided by the internal split resistors, R1 and R2. When a feed back voltage is lower than the reference

voltage, the output voltage of the error amplifier is increased. The gain and frequency characteristics of the error amplifier

output are fixed internally to deliver an optimized signal to the mixer.

The current limiter circuit of the XCL208/XCL209 series monitors the current flowing through the P-ch MOS driver transistor

connected to the Lx pin, and features a combination of the current limit mode and the operation suspension mode.

① When the driver current is greater than a current limit level, the current limit function operates to turn off the pulses from the

Lx pin at any given timing.

② When the driver transistor is turned off, the limiter circuit is then released from the current limit detection state.

③ At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of an over

current state.

④ When the over current state is eliminated, the IC resumes its normal operation.

The IC waits for the over current state to end by repeating the steps ① through ③. If an over current state continues for a latch

time and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the driver

transistor, and goes into operation suspension state. Once the IC is in suspension state, operations can be resumed by either

turning the IC off via the CE pin, or by restoring power to the V_INpin. The suspension state does not mean a complete shutdown,

but a state in which pulse output is suspended; therefore, the internal circuitry remains in operation. The current limit of the

XCL208/XCL209 series can be set at 800mA at typical. Depending on the state of the PC Board, latch time may become longer

and latch operation may not work. In order to avoid the effect of noise, an input capacitor is placed as close to the IC as possible.

Limit＜#ms

Limit＞#ms

Current Limit Level

0mA

ILx

V_OUT

V_SS

Lx

V_CE

Restart

V_IN

10/22

XCL208/XCL209

Series

■OPERATIONAL DESCRIPTION(Continued)

<Short-Circuit Protection>

The short-circuit protection circuit monitors the internal R1 and R2 divider voltage (Type F: FB pin voltage). In case where

output is accidentally shorted to the Ground and when the FB point voltage decreases less than half of the reference voltage

(Vref) and a current more than the I_LIMflows to the driver transistor, the short-circuit protection quickly operates to turn off

and to latch the driver transistor. In the latch state, the operation can be resumed by either turning the IC off and on via the

CE pin, or by restoring power supply to the V_INpin.

Also, when sharp load transient happens, a voltage drop at the V_OUTis propagated through C_FB, as a result, short circuit

protection may operate in the voltage higher than short-circuit protection voltage.

When the VIN pin voltage becomes 1.4V (TYP.) or lower, the P-channel output driver transistor is forced OFF to prevent false

pulse output caused by unstable operation of the internal circuitry. When the V_INpin voltage becomes 1.8V or higher, by

releasing the UVLO state then the soft-start function initiates output startup operation. The soft-start function operates even

when the VIN pin voltage falls momentarily below the UVLO operating voltage same as releasing the UVLO function. The

UVLO circuit does not cause a complete shutdown of the IC, but causes pulse output to be suspended; therefore, the internal

circuitry remains in operation.

In PFM control operation, until coil current reaches to IPFM, the IC keeps the P-ch MOSFET on.

In this case, on-time (t_ON) that the P-ch MOSFET is kept on can be given by the following formula.

t

_ON= L×IPFM / (VIN－VOUT) →IPFM①

In the PFM control operation, the maximum PFM Duty Limit is set to 200% (TYP.). Therefore, under the condition that the

step-down ratio is small, it’s possible for P-ch MOSFET to be turned off even when coil current doesn’t reach to IPFM. →IPFM②

I_PFM①

I_PFM②

<C_LHigh Speed Discharge>

The XCL208B/XCL209B and the XCL208F/XCL209F can quickly discharge the electric charge at the output capacitor (C_L)

when a low signal to the CE pin which enables a whole IC circuit put into OFF state, is inputted via the N-ch transistor located

between the L_Xpin and the V_SSpin. When the IC is disabled, electric charge left at the output capacitor (C_L) is quickly

discharged so that it may avoid application malfunction. Discharge time is set by the C_Lauto-discharge resistance (R_DCHG) and

the output capacitance (C_L). By setting time constant as τ(τ=C_Lx R_DCHG), discharge time of the output voltage is calculated

by the following formula.

V = V_OUT(T)x e ^–t/or t=τln (V_OUT(T)/ V)

τ

V : Output voltage after discharge

100

CL=10uF

CL=20uF

CL=50uF

90

80

70

60

50

40

30

20

10

0

V

_OUT(T): Output voltage

t: Discharge time,

τ: C_Lx R_DCHG

C_L: Output capacitance (C_L)

R

_DCHG: C_Lauto-discharge resistance

0

10

20

30

40

50

60

70

80

90 100

11/22

XCL208/XCL209 Series

■OPERATIONAL DESCRIPTION(Continued)

The operation of the XCL208/XCL209 series will enter into the stand-by mode when a low level signal is input to the CE pin.

During the stand-by mode, the current consumption of the IC becomes 0μA (TYP.), with a state of high impedance at the Lx pin

and VOUT pin. The IC starts its operation by inputting a high level signal to the CE pin. The input to the CE pin is a CMOS input

and the sink current is 0μA (TYP.).

(A)

(B)

(A)

使用例A

使用例B

V_DD

SW_CE

ON

OPERATIONAL STATES

Stand-by

V_DD

V_IN

CE

V_IN

CE

SW_CE

R1

OFF

Active

(B)

SW_CE

R2

SW_CE

ON

OPERATIONAL STATES

Active

< IC inside >

IC内部

< IC inside >

IC内部

OFF

Stand-by

<Soft-Start>

Soft-start time is internally set. Soft-start time is defined as the time to reach 90% of the output nominal voltage when the CE pin

is turned on.

t_SS

V_CEH

0V

90% of setting voltage

設定電圧の90%

V_OUT

0V

12/22

XCL208/XCL209

Series

■NOTE ON USE

1. For temporary, transitional voltage drop or voltage rising phenomenon, the IC is liable to malfunction should the ratings be

exceeded.

2. The XCL208/XCL209 series is designed for use with ceramic output capacitors. If, however, the potential difference is too

large between the input voltage and the output voltage, a ceramic capacitor may fail to absorb the resulting high switching

energy and oscillation could occur on the output. In this case, increase 10μF to the output capacitance for adding

insufficient capacitance. Also, if the output capacitance is too large, the output voltage is slowly rising and the IC may not

operate. Adjust the output capacitance so that the output voltage can go up within the soft-start time.

3. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced by

external component selection, such as the coil inductance, capacitance values, and board layout of external components.

Once the design has been completed, verification with actual components should be done.

4. Depending on the input-output voltage differential, or load current, some pulses may be skipped as 1/2, 1/3 and the ripple voltage

may increase.

5. When the difference between input and output is large in PWM control, very narrow pulses will be outputted, and there is the

possibility that 0% duty cycles may be continued during some cycles.

6. When the difference between input and output is small, and the load current is heavy, very wide pulses will be outputted and

there is the possibility that 100% duty cycles may be continued during some cycles.

7. With the IC, the peak current of the coil is controlled by the current limit circuit. Since the peak current of the coil increases

when dropout voltage or load current is high, current limit starts operation, and this can lead to instability. When peak current

becomes high, please adjust the coil inductance value and fully check the circuit operation. In addition, please calculate the

peak current according to the following formula:

Ipk = (VIN - VOUT) x OnDuty / (2 x L x f_OSC) + IOUT

L: Coil Inductance Value

f_OSC: Oscillation Frequency

8. When the peak current which exceeds limit current flows within the specified time, the built-in P-ch driver transistor turns off.

During the time until it detects limit current and before the built-in transistor can be turned off, the current for limit current

flows; therefore, care must be taken when selecting the rating for the external components such as a coil.

9. When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.

10. Depending on the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid

the effect of noise, the board should be laid out so that input capacitors are placed as close to the IC as possible.

11. Use of the IC at voltages below the minimum operating voltage range may lead to instability.

12. This IC should be used within the stated absolute maximum ratings of external components in order to prevent damage to

the device.

13. When the IC is used in high temperature, output voltage may increase up to input voltage level at no load because of the

leak current of the driver transistor.

14. The current limit is set to 1000mA (MAX.) at typical. However, the current of 1000mA or more may flow.

In case that the current limit functions while the VOUT pin is shorted to the GND pin, when P-ch MOSFET is ON, the potential

difference for input voltage will occur at both ends of a coil. For this, the time rate of coil current becomes large. By

contrast, when N-ch MOSFET is ON, there is almost no potential difference at both ends of the coil since the VOUT pin is

shorted to the GND pin. Consequently, the time rate of coil current becomes quite small. According to the repetition of this

operation, and the delay time of the circuit, coil current will be converged on a certain current value, exceeding the amount of

current, which is supposed to be limited originally. Even in this case, however, after the over current state continues for

several ms, the circuit will be latched. A coil should be used within the stated absolute maximum rating in order to prevent

damage to the device.

①Current flows into P-ch MOSFET to reach the current limit (ILIM).

②The current of ILIM or more flows since the delay time of the circuit occurs during from the detection of the current limit to OFF of P-ch MOSFET.

③Because of no potential difference at both ends of the coil, the time rate of coil current becomes quite small.

④Lx oscillates very narrow pulses by the current limit for several ms.

⑤The circuit is latched, stopping its operation.

②

①

③

④

⑤

Limit ＞#ms

Delay

Lx

I_LIM

I_Lx

13/22

XCL208/XCL209 Series

■NOTE ON USE (Continued)

15. In order to stabilize V_INvoltage level and oscillation frequency, we recommend that a by-pass capacitor (C_IN) be connected

as close as possible to the V_IN& V_SSpins.

16. High step-down ratio and very light load may lead an intermittent oscillation when PWM mode.

17. For the XCL209, when PWM/PFM automatic switching goes into continuous mode, the IC may be in unstable operation for

the range of MAXDUTY area with small input/output differential. Once the design has been completed, verification with

actual components should be done.

18. Torex places an importance on improving our products and their reliability.

We request that users incorporate fail-safe designs and post-aging protection treatment when using Torex products in their

systems.

19. Instructions of pattern layouts

(1) In order to stabilize V_INvoltage level, we recommend that a by-pass capacitor (C_IN) be connected as close as possible to

the V_IN(No.8) and PV_SS(No.1) pins.

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

(3) Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit

impedance.

(4) Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground

currents at the time of switching may result in instability of the IC.

(5) Internal driver transistors bring on heat because of the output current and ON resistance of the driver transistors.

(6) Please connect Lx (No.2) pin and L1 (No.9) pin on the PCB layout.

(7) Please connect V_OUT(No.4) pin and L2 (No.10) pin on the PCB layout. (Type A/B)

（PCB mounted TOP VIEW）

（TOP VIEW）

（BOTTOM VIEW）

（PCB mounted TOP VIEW）

（TOP VIEW）

（BOTTOM VIEW）

XCL208/209

GND

CE

VOUT

CFB

GND

CE

VOUT

CFB

CL

RFB1

IC

LX

CIN

GND

VIN

GND

VIN

TOREX

FB

TOREX

FB

USP-10B03

: IC

: Ceramic Cap

: Chip Resistance

14/22

XCL208/XCL209

Series

■NOTE ON USE (Continued)

20. Typical application circuit

< Typical application circuits Type F>

Example of external components

Example of external components (V_OUT=1.8V)

C_IN: 10V/4.7μF（LMK107BJ475KA TAIYO YUDEN）

C_L: 10V/10μF（LMK107BBJ106MA TAIYO YUDEN）

C_IN: 10V/4.7μF（LMK107BJ475KA TAIYO YUDEN）

C_L: 10V/10μF（LMK107BBJ106MA TAIYO YUDEN）

R

C

_FB1: 300kΩ

_FB2: 240kΩ

_FB: 150pF（C1005CH1H151J TDK）

NOTE:

The integrated Inductor can be used only for this DC/DC converter. Please do not use this inductor for other reasons.

Please use B, X5R, and X7R grades in temperature characteristics for the C_INand C_Lcapacitors.

These grade ceramic capacitors minimize capacitance-loss as a function of voltage stress.

If necessary, increase capacitance by adding or replacing.

Examples of external components

PART NUMBER

LMK107BJ475KA

LMK212B7475KG

LMK107BBJ106MA

LMK212B7106MG

MANUFACTURE RATED VOLTAGE / INDUCTANCE / FEATURES

Size (L×W)

TAIYO YUDEN

10V/4.7μF/X5R

10V/4.7μF/X7R

10V/10μF/X5R

10V/4.7μF/X7R

1.6mm×0.8mm

2.0mm×1.25mm

1.6mm×0.8mm

2.0mm×1.25mm

C_IN

C_L

15/22

XCL208/XCL209 Series

■TYPICAL PERFORMANCE CHARACTERISTICS

(1) Efficiency vs. Output Current

(2) Output Voltage vs. Output Current

XCL208B183DR/XCL209B183DR

XCL209(PWM/PFM)

XCL208B183DR/XCL209B183DR

100

80

60

40

20

0

2.1

2.0

1.9

1.8

1.7

1.6

1.5

XCL208/XCL209

V_IN=4.2V,3.6V,2.4V

2.4V

3.6V

ꢀꢀꢀꢀ

V_IN= 4.2V

XCL208

(PWM)

0.1

1

10

100

1000

0.1

1

10

100

1000

100

Output Current:I_OUT(mA)

(3) Ripple Voltage vs. Output Current

(4) Oscillation Frequency vs. Ambient Temperature

XCL208B183DR/XCL209B183DR

3.5

XCL208B183DR/XCL209B183DR

100

80

60

40

20

0

3.4

3.3

3.2

3.1

3.0

2.9

2.8

2.7

2.6

2.5

V_IN=3.6V

XCL208

V_IN=2.4

XCL209

V_IN=2.4V

V

3.6V,4.2V

3.6V,4.2

0.1

1

10

100

-50

-25

0

25

50

75

100

Output Current:I_OUT(mA)

Ambient Temperature: Ta (

)

℃

(5) Supply Current vs. Ambient Temperature

(6) Output Voltage vs. Ambient Temperature

XCL209B183DR

40

XCL208B183DR/XCL209B183DR

2.1

2.0

1.9

1.8

1.7

1.6

1.5

V_IN=6.0V

35

30

25

20

15

10

5

4.0V

V_IN=3.6V

2.0V

0

-50

-25

0

25

50

75

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

16/22

XCL208/XCL209

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(7) UVLO Voltage vs. Ambient Temperature

(8) CE "H" Voltage vs. Ambient Temperature

XCL208B183DR/XCL209B183DR

1.8

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

CE=V_IN

1.5

1.2

0.9

0.6

0.3

0.0

V_IN=5.0V

3.6V

2.4V

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

Ambient Temperature: Ta (

)

℃

(9) CE "L" Voltage vs. Ambient Temperature

(10) Soft Start Time vs. Ambient Temperature

XCL208B183DR/XCL209B183DR

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

5.0

4.0

3.0

2.0

1.0

0.0

V_IN=5.0V

3.6V

V_IN=3.6V

2.4V

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

℃

Ambient Temperature: Ta (

)

℃

(11) "Pch / Nch" Driver on Resistance vs. Input Voltage

(12) Rise Wave Form

XCL208B333DR/XCL209B333DR

XCL208B183DR/XCL209B183DR

1.0

V_IN= 5.0V

0.9

0.8

I_OUT= 1.0mA

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

Nch on Resistance

2ch

V_OUT

Pch on Resistance

1ch

CE:0.0V⇒1.0V

1ch:1V/div

2ch:1V/div

0

1

2

3

4

5

6

Input Voltage : V_IN(V)

Time:100μs/div

17/22

XCL208/XCL209 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(13) Soft-Start Time vs. Ambient Temperature

(14) C_LDischarge Resistance vs. Ambient Temperature

XCL208B333DR/XCL209B333DR

500

XCL208B333DR/XCL209B333DR

600

500

400

300

200

100

400

V_IN=5.0V

2.0V

I_OUT=1.0mA

V_IN=6.0V

300

200

100

0

4.0V

-50

-25

0

25

50

75

100

-50

-25

0

25

50

75

100

Ambient Temperature: Ta (

)

℃

Ambient Temperature: Ta (

)

℃

(15) Load Transient Response

MODE：PWM/PFM Automatic Switching Control

XCL209B183DR

V_IN=3.6V,V_OUT=1.8V

I_OUT=1mA

100mA

I_OUT=1mA

300mA

⇒

1ch

2ch

1ch

V_OUT

2ch

1ch:100mA/div 2ch:50mV/div

Time:100μs/div

XCL209B183DR

V_IN=3.6V,V_OUT=1.8V

I_OUT=100mA ⇒1mA

I_OUT=300mA ⇒1mA

1ch

2ch

1ch

2ch

V_OUT

1ch:100mA/div 2ch:50mV/div

Time:100μs/div

18/22

XCL208/XCL209

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) Load Transient Response (Continued)

MODE：PWM Control

XCL208B183DR

V_IN=3.6V,V_OUT=1.8V

I_OUT=1mA

100mA

I_OUT=1mA

300mA

⇒

1ch

2ch

1ch

2ch

V_OUT

1ch:100mA/div 2ch:50mV/div

Time:100μs/div

XCL208B183DR

V_IN=3.6V,V_OUT=1.8V

I_OUT=100mA ⇒1mA

I

_OUT=300mA ⇒1mA

1ch

2ch

1ch

2ch

V_OUT

1ch:100mA/div 2ch:50mV/div

Time:100μs/div

19/22

XCL208/XCL209 Series

■PACKAGING INFORMATION

●USP-10B03 (unit: mm)

2.5±0.05

1PIN INDENT

(0.5) 0.9±0.05

(0.6)

0.4±0.05

(0.05)

1

2

3

4

9

10

8

7

(0.65)

6

5

0.3±0.05

(0.05)

●USP-10B03 Reference Pattern Layout (unit: mm)

●USP-10B03 Reference Metal Mask Design (unit: mm)

20/22

XCL208/XCL209

Series

■MARKING RULE

① represents products series

USP-10B03

MARK

PRODUCT SERIES

XCL208******

8

9

1

2

3

4

8

7

6

5

XCL209******

② represents integer of output voltage and oscillation frequency

XCL20*F***** (FB Product)

MARK

OUTPUT VOLTAGE(V)

OSCILLATION FREQUENCY=3.0MHz

(XCL20*F**3**)

0.x

F

XCL20*A*****

MARK

OUTPUT VOLTAGE (V)

OSCILLATION FREQUENCY=3.0MHz

(XCL20*A**3**)

0.x

1.x

2.x

3.x

4.x

0

1

2

3

4

XCL20*B*****

MARK

OUTPUT VOLTAGE (V)

OSCILLATION FREQUENCY=3.0MHz

(XCL20*B**3**)

0.x

1.x

2.x

3.x

4.x

A

B

C

D

E

③ represents the decimal part of output voltage

OUTPUT

MARK

PRODUCT SERIES

MARK

PRODUCT SERIES

VOLTAGE (V)

X.0

X.1

X.2

X.3

X.4

X.5

X.6

X.7

X.8

X.9

0

1

2

3

4

5

6

7

8

9

XCL20***0***

XCL20***1***

XCL20***2***

XCL20***3***

XCL20***4***

XCL20***5***

XCL20***6***

XCL20***7***

XCL20***8***

XCL20***9***

X.05

X.15

X.25

X.35

X.45

X.55

X.65

X.75

X.85

X.95

A

B

C

D

E

F

XCL20***A***

XCL20***B***

XCL20***C***

XCL20***D***

XCL20***E***

XCL20***F***

XCL20***H***

XCL20***K***

XCL20***L***

XCL20***M***

H

K

L

M

Example （Mark ②, ③）

MARK

OSCILLATION

FREQUENCY

XCL20*F08***

XCL20*A18***

XCL20*B3D***

②

③

②

③

②

③

3.0MHz

F

8

1

8

D

④,⑤ represents production lot number

01～09, 0A～0Z, 11～9Z, A1～A9, AA～AZ, B1～ZZ in order.

(G, I, J, O, Q, W excluded)

*No character inversion used.

21/22

XCL208/XCL209 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.

prior permission of TOREX SEMICONDUCTOR LTD.

22/22


型号：	XCL208
厂家：	Torex Semiconductor
描述：	400mA Inductor Built-in Step-Down âmicro DC/DCâ Converters 400毫安电感内置步下了????微型DC / DCA ????转换器转换器
文件：	总22页 (文件大小：824K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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