XCL231B0K1H2_技术文档

XCL230/XCL231 Series

36V, 600mA Inductor Built-in Step-down “micro DC/DC” Converter

■GENERAL DESCRIPTION

ETR28019-002

The XCL230/XCL231 Series is a small (3.0mm×3.0mm, h=1.7mm) 36V, 600mA step-down DC/DC converter with an integrated

control IC and coil. Integrating the coil makes for easier circuit board layout and minimizes malfunction and noise from the

component and wiring layout.

The input voltage range is 3.0 to 36V, the switching frequency is 1.2MHz, and a synchronous rectification circuit is used to achieve

a stable power supply at high efficiency. The XCL230 Series fixes the operation frequency using PWM control to suppress output

ripple voltage.

The XCL231 Series automatically switches between PWM and PFM control to reduce loss by lowering the operation frequency

during low loads to achieve high efficiency across the entire range from low to high loads.

A 0.75V standard voltage supply is built in, and the output voltage can be set to 1.0V to 5.0V using an external resistance.

The soft start time is internally set to 2.0ms, and a time that is longer than the internal soft-start can be freely set depending on the

resistance and capacity connected to the EN/SS pin.

An overcurrent protection function and thermal shutdown function are built in as protective functions to ensure safe use in the

event of a short circuit.

■FEATURES

Input Voltage Range

Output Voltage Range

FB Voltage

■APPLICATIONS

● Electricity Meters

● Gas Detectors

:

3.0V ~ 36V (Absolute Max 40V)

1.0V ~ 5.0V

0.75V ± 1.5%

● Various Sensors

Output Current

600mA

● Industrial Equipment

● Home Appliances

Oscillation Frequency

Efficiency

1.2MHz

86%(V_IN=12V,V_OUT=5V, I_OUT=300mA)

PWM control (XCL230)

PWM/PFM Auto (XCL231)

Soft-start External settings

Control Methods

Function

Power good

Over Current Protection

(Automatic recovery)

Thermal Shutdown

Protection Circuits

:

Output Capacitor

Operating Ambient Temperature

Packages

:

Ceramic Capacitor

-40℃ ~ 105℃

DFN3030-10B

Environmentally Friendly

EU RoHS Compliant, Pb Free

■TYPICAL PERFORMANCE

■TYPICAL APPLICATION CIRCUIT

CHARACTERISTICS

XCL230/XCL231

V_IN=V_EN/SS=12V, V_OUT=5.0V

C

_IN1=4.7μF(UMK212BBJ475KG),

C

_IN2=0.1μF(UMK107BJ104MAHT)

100

90

80

70

60

50

40

30

20

10

0

R_PG

C_L=22μF(TMK212BBJ226MG)

Lx

L1

PG

L2

V_EN/SS

EN/SS

V_OUT

V_IN

C_FB

V_IN

C_L

R_FB1

FB

C_IN1

C_IN2

GND

R_FB2

XCL230

XCL231

0.1

1

10

100

1000

Output current : I_OUT[mA]

1/37

XCL230/XCL231 Series

■BLOCK DIAGRAM

L1

L2

Inductor

V_IN

Local

Reg

Each

Circuit

Under

Voltage

Lock Out

Gate

CLAMP

Current

SENSE

Thermal

Shutdown

Operation

Enable

Each

Circuit

CE

Controller

Logic

EN/SS

Current

Feed

Back

Current

Limit

PFM

Vref

Soft Start

Current

Limit

High

Side

Buffer

PWM/PFM

Controller

Logic

FB

Lx

Low

Side

Buffer

Error

Amp.

PWM

Comparator

Ramp Wave

Generator

Oscillator

PG

GND

Power-Good

Comparator

* "PWM/PFM Controller Logic" in the XCL230 series is fixed to PWM control.

"PWM/PFM Controller Logic" In the XCL231 series is fixed to PWM/PFM automatic switching control.

Diodes inside the circuit are an ESD protection diode and a parasitic diode.

2/37

XCL230/XCL231

Series

■PRODUCT CLASSIFICATION

●Ordering Information

XCL230①②③④⑤⑥ PWM Control

XCL231①②③④⑤⑥ PWM/PFM Automatic Switching Control

DESIGNATOR

ITEM

Type

SYMBOL

B

DESCRIPTION

Refer to Selection Guide

0.75V

①

②③

FB Voltage

0K

(Output voltage can be adjusted in 1.0V to 5.0V)

1.2MHz

④

Oscillation Frequency

Packages (Order Unit)

1

⑤⑥

H2

DFN3030-10B (3,000pcs/Reel)

●Selection Guide

FUNCTION

B TYPE

Yes

Chip Enable

UVLO

Yes

Thermal Shutdown

Soft Start

Yes

Power-Good

Current Limiter

Yes

(Automatic Recovery)

3/37

XCL230/XCL231 Series

■PIN CONFIGURATION

9 L1

V_IN

8

1 Lx

NC 7

EN/SS 6

PG 5

2 GND

3 NC

4 FB

10 L2

( BOTTOM VIEW )

* The dissipation pad for the DFN3030-10B package should be solder plated in recommended mount pattern

and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to

other pins, it should be connected to the GND (No.2) pin.

■PIN ASSIGNMENT

PIN NUMBER

PIN NAME

FUNCTION

Switching Output

Ground

1

2

LX

GND

NC

3

No Connection

Output Voltage Sense

Power good Output

Enable Soft-start

No Connection

Power Input

4

FB

5

PG

6

EN/SS

NC

7

8

V_IN

9

L1

Inductor Electrodes

10

L2

* The NC terminals (pin numbers 3 & 7) are not connected to the IC chip.

4/37

XCL230/XCL231

Series

■FUNCTION CHART

PIN NAME

SIGNAL

STATUS

Active

H

L

EN/SS

Stand-by

OPEN

Undefined State^(*1)

^(*1)Please do not leave the EN/SS pin open. Each should have a certain voltage

PIN NAME CONDITION

SIGNAL

V_FB> V_PGDET

H (High impedance)

L (Low impedance)

V_FB≦ V_PGDET

EN/SS = H

EN/SS = L

Thermal Shutdown

UVLO

PG

Undefined State

(V_IN< V_UVLOD

)

Stand-by

L (Low impedance)

■ABSOLUTE MAXIMUM RATINGS

PARAMETER

V_INPin Voltage

SYMBOL

V_IN

RATINGS

UNITS

V

-0.3 ~ 40

EN/SS Pin Voltage

FB Pin Voltage

V_EN/SS

V_FB

V

-0.3 ~ 6.2

V

PG Pin Voltage

V_PG

-0.3 ~ 6.2

V

PG Pin Current

I_PG

8

mA

V

Lx Pin Voltage

V_Lx

-0.3 ~ V_IN+ 0.3 or 40 ^(*1)

Power Dissipation (Ta=25℃)

Operating Ambient Temperature

Storage Temperature

Pd

1950 (JESD51-7 board) ^(*2)

-40 ~ 105

mW

℃

Topr

Tstg

-55 ~ 125

℃

All voltages are described based on the GND pin.

^(*1)The maximum value should be either V_IN+0.3V, or 40V, whichever is the lowest.

^(*2)The power dissipation figure shown is PCB mounted and is for reference only.

Please refer to PACKAGING INFORMATION for mounting conditions.

5/37

XCL230/XCL231 Series

■ELECTRICAL CHARACTERISTICS

XCL230/XCL231 Series

Ta=25℃

CIRCUIT

PARAMETER

SYMBOL

V_FBE

CONDITIONS

V_FB=0.739V→0.761V,

MIN.

TYP.

MAX.

UNIT

V

FB Voltage when Lx pin voltage changes

from"H" level to "L" level

FB Voltage

0.739 0.750 0.761

②

Output Voltage

Setting Range

-

V_OUTSET

1.0

3.0

-

5.0

V

-

Input Voltage

V_IN

36.0

Operating Range

V_EN/SS=12V,V_IN=2.8V→

Ta=25℃

2.6

2.53

2.7

-

2.8

2.87

2.9

2.6V,V_FB=0V

UVLO Detect Voltage

UVLO Release Voltage

V_UVLOD

V

②

V

_INVoltage which Lx pin

Ta=-40~105℃^(*1)

Ta=25℃

voltage holding "H" level

V_EN/SS=12V,V_IN=2.7V→

2.8

-

2.9V,V_FB=0V

V_UVLOR

V

②

④

V

_INVoltage which Lx pin

Ta=-40~105℃^(*1)

2.63

2.97

voltage holding "L" level

Quiescent Current

(XCL230)

V_FB=0.825V

I_q

-

180

350

μA

Quiescent Current

(XCL231)

V_FB=0.825V

I_q

-

12.5

1.65

21.0

2.50

μA

④

①

V_IN=12V, V_EN/SS=V_FB=0V

Stand-by Current

I_STBY

f_OSC

Connected to external components,

_OUT=150mA

Oscillation Frequency

1.098 1.200 1.302

MHz

I

Connected to external components

V_FB=0.825V

Minimum On Time

Minimum Duty Cycle

t_ONMIN

D_MIN

D_MAX

R_LxH

R_LxL

I_LIMH

t_SS1

-

85 ^(*1)

-

ns

%

Ω

①

②

⑤

-

0

V_FB=0.675V

Maximum Duty Cycle

100

-

1.38

-

V_FB=0.675V, I_Lx=200mA

Lx SW "H" On Resistance

Lx SW "L" On Resistance

High side Current Limit ^(*2)

Internal Soft-Start Time

1.20

0.60^(*1)

1.3

-

Ω

V_FB=V_FBE×0.98

V_FB=0.675V

1.0

1.6

-

A

⑤

②

2.0

2.4

ms

V_FB=0.675V

External Soft-Start Time

t_SS2

21

-

26

33

-

ms

③

R_SS=430kΩ, C_SS=0.47μF

Connected to external components,

V_IN=V_EN/SS=12V、I_OUT=1mA

PFM Switch Current

(XCL231)

I_PFM

450

mA

①

Connected to external components,

V_IN=12V, V_OUT=5V, I_OUT=300mA

Efficiency

EFFI

-

86

-

%

①

②

ΔV_FB

/

FB Voltage

-40℃≦T_opr≦105℃

±100

ppm/℃

(ΔT_opr・V_FBE

)

Temperature Characteristics

Test Condition: Unless otherwise stated, V_IN=12V, V_EN/SS=12V, PG=OPEN

Peripheral parts connection conditions (V_OUT=5.0V): R_FB1=680kΩ, R_FB2=120kΩ, C_FB=15pF, C_L=22μF, C_IN=4.7μF

^(*1)Design reference value. This parameter is provided only for reference.

^(*2)Current limit denotes the level of detection at peak of coil current.

6/37

XCL230/XCL231

Series

■ELECTRICAL CHARACTERISTICS (Continued)

XCL230/XCL231 Series

Ta=25℃

CIRCUIT

PARAMETER

SYMBOL

CONDITIONS

V_FB=0.712V→0.638V,

_PG:100kΩ pull-up to 5V

MIN.

TYP.

MAX.

UNIT

V

R

PG Detect Voltage

V_PGDET

0.638 0.675 0.712

⑤

FB Voltage when PG pin voltage changes

from"H" level to "L" level

V_FB=0.6V, I_PG=1mA

PG Output Voltage

FB "H" Current

FB "L" Current

V_PG

I_FBH

I_FBL

-

0.3

0.1

V

②

④

V_IN=V_EN/SS=36V, V_FB=3.0V

V_IN=V_EN/SS=36V, V_FB=0V

-0.1

0.0

μA

V_EN/SS=0.3V→2.5V,

Ta=25℃

V

_FB=0.71V

EN/SS Voltage when Lx

pin voltage changes from

"L" level to "H" level

EN/SS "H" Voltage

EN/SS "L" Voltage

V_EN/SSH

2.5

-

36.0

0.3

V

②

Ta=-40~105℃^(*1)

Ta=25℃

V_EN/SS=2.5V→0.3V,

V

_FB=0.71V

EN/SS Voltage when Lx

pin voltage changes from

"H" level to "L" level

V_EN/SSL

GND

Ta=-40~105℃^(*1)

V_IN=V_EN/SS=36V, V_FB=0.825V

EN/SS "H" Current

EN/SS "L" Current

I_EN/SSH

I_EN/SSL

-

0.1

0.0

0.3

0.1

μA

④

V_IN=36V, V_EN/SS=0V, V_FB=0.825V

-0.1

Thermal Shutdown

Temperature

Junction Temperature

T_TSD

-

150

25

-

℃

-

Thermal Shutdown

Hysteresis Width

Junction Temperature

T_HYS

Test Freq.=1MHz

Inductance

L

-

4.7

1.8

-

μH

-

⊿T=+40℃

Inductor Rated Current

I_DC

A

Test Condition: Unless otherwise stated, V_IN=12V, V_EN/SS=12V, PG=OPEN

^(*1)Design reference value. This parameter is provided only for reference.

7/37

XCL230/XCL231 Series

■TEST CIRCUITS

Circuit No.①

Probe

V_IN

L2

A

EN/SS

PG

L1

Lx

V

V_OUT

C_IN

V

R_FB1

A

C_FB

C_L

FB

V

R_FB2

GND

Circuit No.②

V_IN

L2

V

Probe

EN/SS

PG

L1

Lx

C_IN

R_PG=100kΩ

V

FB

V

GND

V

100kΩ

Circuit No.③

V_IN

L2

R_SS=430kΩ

Probe

EN/SS

PG

L1

Lx

C_IN

V

C_SS

FB

0.47μF

V

GND

V

100kΩ

8/37

XCL230/XCL231

Series

■TEST CIRCUITS (Continued)

Circuit No.④

V_IN

L2

A

EN/SS

PG

L1

Lx

A

V

FB

A

V

GND

Circuit No.⑤

V_IN

L2

V

EN/SS

L1

Lx

C_IN

R_PG=100kΩ

V

PG

FB

V

GND

Probe

9/37

XCL230/XCL231 Series

■TYPICAL APPLICATION CIRCUIT / Parts Selection Method

R_PG

Lx

L1

PG

L2

V_EN/SS

EN/SS

V_OUT

V_IN

C_FB

V_IN

C_L

R_FB1

FB

C_IN1

C_IN2

GND

R_FB2

* The inductor is dedicated to this product. Please do not use it for purposes other than this product.

【Typical Example】

VALUE

PRODUCT NUMBER

Notes

V_IN<20V

UMK212BBJ475KG (Taiyo Yuden)

V_IN≧20V, 2 parallel

V_IN<20V

(*1)

C_IN1

50V/4.7μF

C2012X7R1H475K125AC (TDK)

V_IN≧20V, 2 parallel

C1608X7R1H104K080AE (TDK)

UMK107BJ104MAHT (Taiyo Yuden)

C2012X7R1A106K125AC (TDK)

C3216X7R1E106K160AB (TDK)

TMK212BBJ226MG (Taiyo Yuden)

C_IN2

50V/0.1μF

10V/10μF

35V/10μF

25V/22μF

2 parallel

(*2)

C_L

Select parts considering the DC bias characteristics and rated voltage of ceramic capacitors.

^(*1)For C_IN1, use a capacitor with the same or higher effective capacity value as the recommended components.

^(*2)For C_L, use a capacitor with the same or higher effective capacity value as the recommended components.

If a capacitor with a low effective capacity value is used, the output voltage may become unstable.

However, if large capacity capacitors, such as electrolytic capacitors, are connected in parallel, the inrush current

during startup could increase or the output could become unstable.

10/37

XCL230/XCL231

Series

■TYPICAL APPLICATION CIRCUIT / Parts Selection Method (Continued)

< Output Voltage Setting Value V_OUTSETSetting >

The output voltage can be set by adding an external dividing resistor.

The output voltage is determined by the equation below based on the values of R_FB1and R_FB2

.

V_OUTSET= 0.75V × (R_FB1+ R_FB2) / R_FB2

With R_FB2≦ 200kΩ and R_FB1+ R_FB2≦ 1MΩ

< C_FBSetting >

Adjust the value of the phase compensation speed-up capacitor C_FBusing the equation below.

1

C_FB

=

2π × fzfb× R_FB1

1

fzfb =

2π C_L× L

【Setting Example】

When the output voltage setting is 5V with fosc=1.2MHz, CL=22μF, L=4.7μH,

V_OUTSET= 0.75V × (680kΩ + 120kΩ) / 120kΩ = 5.0V,

From the above formula, fzfb = 15.66kHz is targeted,

C_FB= 1 / (2 × π × 15.66kHz × 680kΩ) = 14.95pF, which is 15pF for the E24 series.

XCL230 Series

V_OUTSET

1.2V

R_FB1

12kΩ

51kΩ

68kΩ

R_FB2

20kΩ

15kΩ

12kΩ

C_FB

Target fzfb

15.66kHz

820pF

220pF

150pF

3.3V

5.0V

XCL231 Series

V_OUTSET

1.2V

R_FB1

R_FB2

C_FB

Target fzfb

15.66kHz

120kΩ

510kΩ

680kΩ

200kΩ

150kΩ

120kΩ

82pF

22pF

15pF

3.3V

5.0V

11/37

XCL230/XCL231 Series

■OPERATIONAL EXPLANATION

The XCL230/XCL231 series consists internally of a reference voltage supply with soft-start function, a ramp wave circuit, an

error amp, a PWM comparator, a High side driver FET, a Low side driver FET, a High side buffer circuit, a Low side buffer circuit,

a current sense circuit, a phase compensation (Current feedback) circuit, a current limiting circuit, an under voltage lockout

(UVLO) circuit, an internal power supply (Local Reg) circuit, a gate clamp (CLAMP) circuit and other elements.

The control method is the current mode control method for handling low ESR ceramic capacitors.

L1

L2

Inductor

V_IN

Local

Reg

Each

Circuit

Under

Voltage

Lock Out

Gate

CLAMP

Current

SENSE

Thermal

Shutdown

Operation

Enable

Each

Circuit

CE

Controller

Logic

EN/SS

Current

Feed

Back

Current

Limit

PFM

Vref

Soft Start

Current

Limit

High

Side

Buffer

PWM/PFM

Controller

Logic

FB

Lx

Low

Side

Buffer

Error

Amp.

PWM

Comparator

Ramp Wave

Generator

Oscillator

PG

GND

Power-Good

Comparator

12/37

XCL230/XCL231

Series

■OPERATIONAL EXPLANATION (Continued)

< Normal Operation >

The standard voltage Vref and FB pin voltage are compared using an error amplifier and then the control signal to which phase

compensation has been added to the error amplifier output is input to the PWM comparator. The PWM comparator compares the

above control signal and lamp wave to control the duty width during PWM control. Continuously conducting these controls

stabilizes the output voltage.

In addition, the current detecting circuit monitors the driver FET current for each switching and modulates the error amplifier

output signal into a multiple feedback signal (current feedback circuit). This achieves stable feedback control even when low ESR

capacitors, such as ceramic capacitors, are used to stabilize the output voltage.

XCL230 Series

The XCL230 Series (PWM control) performs switching at a set switching frequency f_OSCregardless of the output current. At light

loads the on time is short and the circuit operates in discontinuous mode, and as the output current increases, the on time becomes

longer and the circuit operates in continuous mode.

f_OSC

t_ON

Lx

0V

I_OUT

Coil

Current

Coil

Current

I_OUT

0mA

XCL230 series: Example of light load operation

XCL230 series: Example of heavy load operation

XCL231 Series

The XCL231 Series (PWM/PFM automatic switching control) lowers the switching frequency during light loads by turning on the

High side driver FET when the coil current reaches the PFM current (I_PFM). This operation reduces the loss during light loads and

achieves high efficiency from light to heavy loads. As the output current increases, the switching frequency increases proportional

to the output current, and when the switching frequency increases f_OSC, the circuit switches from PFM control to PWM control and

the switching frequency becomes fixed.

f_OSC

t_ON

Lx

0V

I_PFM

I_OUT

Coil

Current

Coil

Current

I_OUT

0mA

XCL231 series: Example of light load operation

XCL231 series: Example of heavy load operation

< 100% Duty Cycle Mode >

When the dropout voltage is low or there is a transient response, the circuit might change to the 100% Duty cycle mode where

the High side driver FET is continuously on.

The 100% Duty cycle mode operation makes it possible to maintain the output current even when the dropout voltage is low

such as when the input voltage declines due to cranking, etc.

13/37

XCL230/XCL231 Series

■OPERATIONAL EXPLANATION (Continued)

< CE Function >

When an “H” voltage (V_EN/SSH) is input to the EN/SS pin, normal operation is performed after the output voltage is started up by

the soft start function, normal operation is performed. When the “L” voltage (V_EN/SSL) is input to the EN/SS pin, the circuit enters

the standby state, the supply current is suppressed to the standby current I_STB(TYP. 1.65μA), and the High side driver FET and

Low side driver FET are turned off.

< Soft Start Function >

This function gradually starts up the output voltage to suppress the inrush current.

The soft start time is the time until the output voltage from V_EN/SSHreaches 90% of the output voltage set value, and when the

output voltage increases further, the soft start function is cancelled to switch to normal operation.

Internal Soft Start Time

The internal soft start time (t_SS1) is configured so that after the “H” voltage (V_EN/SSH) is input to the EN/SS pin, the standard voltage

connected to the error amplifier increases linearly during the soft-start period. This causes the output voltage to increase

proportionally to the standard voltage increase. This operation suppresses the inrush current and smoothly increases the output

voltage.

t_ss1

EN/SS

V1

90% of setting voltage

V_OUT

< Overview of internal soft start >

< Internal soft start EN/SS circuit >

External Setting Soft Start Time

The external setting soft start time (t_SS2) can adjust the increase speed of the standard voltage in the IC by adjusting the EN/SS

pin voltage inclination during startup using externally connected component R_SSand C_SS. This makes it possible to externally

adjust the soft start time.

Soft start time (t_SS2) is approximated by the equation below according to values of V1, R_SS, and C_SS

When t_ss2is shorter than t_ss1, the output voltage rises at the internal soft start time.

t_ss2=C_ss×R_ss× ln ( V1 / (V1-1.45V) )

【Setting Example】

C_SS= 0.47μF, R_SS= 430kΩ, V1 = 12V

t_SS2= 0.47μF x 430kΩ x ( ln (12V/(12V-1.45V)) = 26ms

t_ss2

V1

R_SS

EN/SS

C_SS

V1

1.45V

EN/SS

V_OUT

90% of setting voltage

< External soft start EN/SS circuit >

< Overview of external soft start >

14/37

XCL230/XCL231

Series

■OPERATIONAL EXPLANATION (Continued)

< Power Good >

The output state can be monitored using the power good function. The PG pin is an Nch open drain output, therefore a pull-up

resistor (approx. 100kΩ) must be connected to the PG pin.

The pull-up voltage should be 5.5V or less. When not using the power good function, connect the PG terminal to GND or leave

it open.

CONDITION

SIGNAL

V_FB> V_PGDET

H (High impedance)

L (Low impedance)

Undefined State

V_FB≦ V_PGDET

EN/SS = H

EN/SS = L

Thermal Shutdown

UVLO (V_IN< V_UVLOD

Stand-by

)

L (Low impedance)

< UVLO Function >

When the V_INpin voltage falls below V_UVLOD(TYP. 2.7V), the high side driver FET and low side driver FET are forcibly turned off

to prevent false pulse output due to instable operation of the internal circuits. When the V_INpin voltage rises above V_UVLOR(TYP.

2.8V), the UVLO function is released, the soft start function activates, and output start operation begins. Stopping by UVLO is not

shutdown; only pulse output is stopped and the internal circuits continue to operate.

< Thermal Shutdown Function >

Athermal shutdown (TSD) function is built in for protection from overheating. When the junction temperature reaches the thermal

shutdown detection temperature T_TSD, the High side driver FET and Low side driver FET are compulsorily turned off.

If the driver FET continues in the off state, the junction temperature declines, and when the junction temperature falls to the

thermal shutdown cancel temperature, the thermal shutdown function is cancelled and the soft-start function operates to start up

the output voltage.

15/37

XCL230/XCL231 Series

■OPERATIONAL EXPLANATION (Continued)

< Current Limit Function >

The current limiting circuit of the XCL230/XCL231 series monitors the current that flows through the High side driver FET and

Low side driver FET, and when over current is detected, the current limiting function activates.

① High side driver FET current limiting

The current in the High side driver FET is detected to equivalently monitor the peak value of the coil current. The High side driver

FET current limiting function forcibly turns off the High side driver FET when the peak value of the coil current reaches the High

side driver current limit value I_LIMH

.

High side driver FET current limit value I_LIMH=1.3A (TYP.)

② Low side driver FET current limiting

The current in the Low side driver FET is detected to equivalently monitor the bottom value of the coil current. The Low side

driver FET current limiting function operates when the High side driver FET current limiting value reaches I_LIMH. The Low side

driver FET current limiting function prohibits the High side driver FET from turning on in an over current state where the bottom

value of the coil current is higher than the Low side driver FET current limit value I_LIML

.

Low side driver FET current limit value I_LIML=0.9A (TYP.)

When the output current increases and reaches the current limit value, the current foldback circuit operates and lowers the

output voltage and FB voltage. The I_LIMHand I_LIMLdecline accompanying the FB voltage decrease to restrict the output current.

When the overcurrent state is removed, the foldback circuit operation increases the I_LIMHand I_LIMLtogether with output voltage

to return the output to the output voltage set value.

Current Limit

I_LIMH=1.3A(TYP.)

I_LIML=0.9A(TYP.)

Coil

Current

0A

Lx

0V

V_OUT

0V

R_LOAD

0Ω

16/37

XCL230/XCL231

Series

■NOTES ON USE

1) In the case of a temporary and transient voltage drop or voltage rise.

If the absolute maximum ratings are exceeded, the IC may deteriorate or be destroyed.

If a voltage exceeding the absolute maximum voltage is applied to the IC due to chattering caused by a mechanical switch or

an external surge voltage, please use a protection element such as a TVS and a protection circuit as a countermeasure.

R_PG

Lx

L1

PG

L2

V_EN/SS

EN/SS

V_OUT

V_IN

C_FB

V_IN

C_L

R_FB1

C_IN1C_IN2

FB

TVS

GND

R_FB2

When the input voltage decreases below the output voltage, there is a possibility that an overcurrent will flow in the IC’s

internal parasitic diode and Lx pin. If the current is pulled into the input side by the low impedance between V_IN-GND, then

countermeasures, such as adding an SBD between V_OUT-V_IN,should be taken.

SBD

R_PG

Lx

L1

PG

L2

V_EN/SS

EN/SS

V_OUT

V_IN

C_FB

V_IN

C_L

R_FB1

C_IN1C_IN2

FB

GND

R_FB2

When a negative voltage is applied to the input voltage by a reverse connection or chattering, an overcurrent could flow in

the IC’s parasitic diode and damage the IC. Take countermeasures, such as adding a reverse touching protection diode.

R_PG

Lx

L1

PG

L2

V_EN/SS

EN/SS

V_OUT

Reverse Touching

Protection Diode

V_IN

C_FB

V_IN

C_L

R_FB1

FB

C_IN1

C_IN2

GND

R_FB2

17/37

XCL230/XCL231 Series

■NOTES ON USE (Continued)

2)

Make sure that the absolute maximum ratings of the external components and of this IC are not exceeded.

3)

The DC/DC converter characteristics depend greatly on the externally connected components as well as on the

characteristics of this IC, so refer to the specifications and standard circuit examples of each component when carefully

considering which components to select.

Be especially careful of the capacitor characteristics and use X7R or X5R (EIA standard) ceramic capacitors.

The capacitance decrease caused by the bias voltage may become large depending on the external size of the

capacitor.

4)

The current limit value is the coil current peak value when switching is not conducted.

The coil current peak value when the actual current limit function begins to operate may exceed the current limit of the

electrical characteristics due to the effect of the propagation delay inside the circuit.

5)

6)

7)

When the On time is less than the Min On Time (t_ONMIN) and the dropout voltage is large or the load is low, the PWM control

operates intermittently and the ripple voltage may become large or the output voltage may become unstable.

The ripple voltage could be increased when switching from discontinuous conduction mode to continuous conduction mode

and when switching to 100% Duty cycle.

The PWM/PFM auto series may cause superimposed ripple voltage by continuous pulses if used in high temperature and

no load conditions. It is necessary to set an idle current of higher than 100μA from V_OUTif used at no load.

It can have the same effect as when R_FB2is lower than 7.5kΩ. Please refer to the

< Output Voltage Setting Value V_OUTSETSetting > section under TYPICAL APPLICATION CIRCUIT.

8)

9)

If the voltage at the EN/SS Pin does not start from 0V but is at the midpoint potential when the power is switched on, the

soft start function may not work properly and it may cause larger inrush current and bigger ripple voltages.

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.

18/37

XCL230/XCL231

Series

■NOTES ON USE (Continued)

10) Pattern Layout Instructions

(1) The operation may become unstable due to noise and/or phase lag from the output current when the wire impedance is

high. Please place the input capacitor (C_IN1, C_IN2) and the output capacitor (C_L) as close to the IC as possible.

(2) In order to stabilize the V_INvoltage level, we recommend that a bypass capacitor (C_IN1, C_IN2) be connected as close as

possible to the V_INand GND pins.

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

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

impedance.

(5) Make sure that the 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.

(6) This product has a built in driver FET, which causes heat generation from the on resistance, so take measures to dissipate

the heat when necessary.

< Reference Pattern Layout >

< Layer2 >

< Layer1 >

< Layer4 >

< Layer3 >

19/37

XCL230/XCL231 Series

■HANDLING OF THIS PRODUCT

(1) The coil complies with the general surface-mounted type chip coil (inductor) specifications and could have scratches,

be dirty with flux, etc.

(2) Please do not use this product in the following environments:

Areas where it could come in to contact with water or salt water. Areas where it could be affected by condensation.

Areas where it could come in contact with toxic gases (Hydrogen Sulfide, Sulfurous Acid, Chlorine, Ammonia, etc.)

(3) This product should not be washed in a solvent.

■ABOUT IMPLEMENTATION

(1) This product is only suitable for reflow soldering (it is not suitable for flow soldering).

(2) This product uses solder to mount the coil on top of the package. This is no problem for regular circuit board mounted reflow,

but if excessive impact is applied during reflow, the mounted coil could be moved out of position or the coil could fall off. Be

careful not to strike the circuit board during circuit board mounting reflow.

20/37

XCL230/XCL231

Series

■TYPICAL PERFORMANCE CHARACTERISTICS

(1) Efficiency vs. Output Current

XCL230B0K1H2

(V_IN=12V, V_OUT=3.3V)

XCL230B0K1H2

(V_IN=12V, V_OUT=5V)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

100

90

80

70

60

50

40

30

20

10

0

100

90

80

70

60

50

40

30

20

10

0

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current :I_OUT[mA]

XCL231B0K1H2

(V_IN=12V, V_OUT=3.3V)

(V_IN=12V, V_OUT=5V)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

100

90

80

70

60

50

40

30

20

10

0

100

90

80

70

60

50

40

30

20

10

0

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current :I_OUT[mA]

21/37

XCL230/XCL231 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(2) Output Voltage vs. Output Current

XCL230B0K1H2

(V_IN=12V, V_OUT=3.3V)

(V_IN=12V, V_OUT=5V)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

3.6

3.5

3.4

3.3

3.2

3.1

3.0

5.3

5.2

5.1

5.0

4.9

4.8

4.7

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current :I_OUT[mA]

XCL231B0K1H2

(V_IN=12V, V_OUT=5V)

(V_IN=12V, V_OUT=3.3V)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

5.3

5.2

5.1

5.0

4.9

4.8

4.7

3.6

3.5

3.4

3.3

3.2

3.1

3.0

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current :I_OUT[mA]

22/37

XCL230/XCL231

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(3) Ripple Voltage vs. Output Current

XCL230B0K1H2

(V_IN=12V, V_OUT=3.3V)

(V_IN=12V, V_OUT=5V)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

100

90

80

70

60

50

40

30

20

10

0

100

90

80

70

60

50

40

30

20

10

0

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current :I_OUT[mA]

XCL231B0K1H2

(V_IN=12V, V_OUT=3.3V)

(V_IN=12V, V_OUT=5V)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

100

90

80

70

60

50

40

30

20

10

0

100

90

80

70

60

50

40

30

20

10

0

0.1

1

10

100

1000

0.1

1

10

100

1000

Output Current :I_OUT[mA]

23/37

XCL230/XCL231 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(4) FB Voltage vs. Ambient Temperature

(5) UVLO Voltage vs. Ambient Temperature

XCL230/XCL231

V_IN=12V

3.0

0.760

2.9

0.755

0.750

0.745

0.740

V_UVLOR(Release Voltage)

2.8

2.7

V_UVLOD(Detect Voltage)

2.6

2.5

-50 -25

0

25

50

75

100 125

-50

-25

0

25

50

75

100 125

Ambient Temperature :Ta[℃]

(6) Oscillation Frequency vs. Ambient Temperature

XCL230/XCL231

(7) Lx SW On Resistance vs. Ambient Temperature

XCL230/XCL231

V_IN=12V

2.0

1.44

1.36

1.28

1.20

1.12

1.04

0.96

1.5

R_LXH

1.0

0.5

R_LXL

0.0

-50

-25

0

25

50

75

100 125

-50

-25

0

25

50

75

100 125

Ambient Temperature :Ta[℃]

(8) Quiescent Current vs. Ambient Temperature

XCL230B0K1H2

XCL231B0K1H2

V_IN=12V

400

30

25

20

15

10

5

350

300

250

200

150

100

50

0

-50 -25

0

25

50

75

100 125

-50 -25

0

25

50

75

100 125

Ambient Temperature :Ta[℃]

24/37

XCL230/XCL231

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(9) Stand-by Current vs. Ambient Temperature

(10) EN/SS Voltage vs. Ambient Temperature

XCL230/XCL231

V

_IN=12V

V_IN=12V

2.5

2.0

1.5

1.0

0.5

0.0

4

EN/SS"H"

EN/SS"L"

3

2

1

0

-50 -25

0

25

50

75

100 125

-50

-25

0

25

50

75

100 125

Ambient Temperature :Ta[℃]

(11) Internal Soft-Start Time vs. Ambient Temperature

XCL230/XCL231

(12) External Soft-Start Time vs. Ambient Temperature

XCL230/XCL231

V_IN=12V, R_SS=430kΩ, C_SS=0.47μF

V_IN=12V

2.6

31

2.4

2.2

2.0

1.8

1.6

1.4

29

27

25

23

21

19

-50 -25

0

25

50

75

100 125

-50 -25

0

25

50

75

100 125

Ambient Temperature :Ta[℃]

(13) PG Detect Voltage vs. Ambient Temperature

XCL230/XCL231

(14) PG Output Voltage vs. Ambient Temperature

XCL230/XCL231

V_IN=12V, I_PG=1mA

V_IN=12V

0.75

0.4

0.3

0.2

0.1

0.0

0.70

0.65

0.60

-50 -25

0

25

50

75

100 125

-50 -25

0

25

50

75

100 125

Ambient Temperature :Ta[℃]

25/37

XCL230/XCL231 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(15) V_IN-V_OUTOperation Area

XCL230B0K1H2

XCL231B0K1H2

I_{O T}≦50mA

Iout≦50mA

I

＞50mA

Iout＞50mA

U

OUT

40

35

30

25

20

15

10

5

40

35

30

25

20

15

10

5

Operation Area

0

1

2

3

4

5

6

0

1

2

3

4

5

6

Output Voltage:V_out[V]

(16) Output Current Operation Area

XCL230/XCL231

V_OUT=5.0V, θja=50℃/W

700

600

500

Operation Area

400

V

=12V

300

200

100

0

系列1

IN

系列2

V_IN=24V

系列3

V_IN=36V

-40 -20

0

20 40 60 80 100 120

Ambient Temperature :Ta[℃]

26/37

XCL230/XCL231

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(17) Load Transient Response (XCL230)

XCL230B0K1H2

V_IN=24V, V_OUT=3.3V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

XCL230B0K1H2

V_IN=12V, V_OUT=3.3V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

I_OUT=10mA⇔300mA

V_OUT: 200mV/div

1.0ms/div

XCL230B0K1H2

V_IN=12V, V_OUT=5.0V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

XCL230B0K1H2

V_IN=24V, V_OUT=5.0V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

I_OUT=10mA⇔300mA

V_OUT: 200mV/div

1.0ms/div

I_OUT=10mA⇔300mA

V_OUT: 200mV/div

1.0ms/div

27/37

XCL230/XCL231 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(17) Load Transient Response (XCL231)

XCL231B0K1H2

V_IN=12V, V_OUT=3.3V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

XCL231B0K1H2

V_IN=24V, V_OUT=3.3V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

I_OUT=10mA⇔300mA

V_OUT: 500mV/div

1.0ms/div

XCL231B0K1H2

V_IN=24V, V_OUT=5.0V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

XCL231B0K1H2

V_IN=12V, V_OUT=5.0V, I_OUT=10mA⇔300mA (t_r, t_f=5μs)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

I_OUT=10mA⇔300mA

V_OUT: 500mV/div

1.0ms/div

28/37

XCL230/XCL231

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(18) Input Transient Response (XCL230)

XCL230B0K1H2

V_IN=8V⇔16V (t_r, t_f=50μs), V_OUT=3.3V, I_OUT=300mA

XCL230B0K1H2

V_IN=16V⇔32V (t_r, t_f=50μs), V_OUT=3.3V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=16V⇔32V

V_IN=8V⇔16V

V_OUT: 200mV/div

1.0ms/div

V_OUT: 200mV/div

1.0ms/div

XCL230B0K1H2

V_IN=8V⇔16V (t_r, t_f=50μs), V_OUT=5.0V, I_OUT=300mA

XCL230B0K1H2

V_IN=16V⇔32V (t_r, t_f=50μs), V_OUT=5.0V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=16V⇔32V

V_IN=8V⇔16V

V_OUT: 200mV/div

1.0ms/div

29/37

XCL230/XCL231 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(18) Input Transient Response (XCL231)

XCL231B0K1H2

V_IN=8V⇔16V (t_r, t_f=50μs), V_OUT=3.3V, I_OUT=300mA

XCL231B0K1H2

V_IN=16V⇔32V (t_r, t_f=50μs), V_OUT=3.3V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=16V⇔32V

V_IN=8V⇔16V

V_OUT: 200mV/div

1.0ms/div

XCL231B0K1H2

V_IN=16V⇔32V (t_r, t_f=50μs), V_OUT=5.0V, I_OUT=300mA

XCL231B0K1H2

V_IN=8V⇔16V (t_r, t_f=50μs), V_OUT=5.0V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=16V⇔32V

V_IN=8V⇔16V

V_OUT: 200mV/div

1.0ms/div

30/37

XCL230/XCL231

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) EN/SS Rising Response (XCL230)

XCL230B0K1H2

V_IN=24V, V_EN/SS=0V→24V(tr=50μs), V_OUT=3.3V, I_OUT=300mA

XCL230B0K1H2

V_IN=12V, V_EN/SS=0V→12V(tr=50μs), V_OUT=3.3V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_EN/SS=0V→12V

V_EN/SS=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

XCL230B0K1H2

V_IN=12V, V_EN/SS=0V→12V(tr=50μs), V_OUT=5.0V, I_OUT=300mA

XCL230B0K1H2

V_IN=24V, V_EN/SS=0V→24V(tr=50μs), V_OUT=5.0V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_EN/SS=0V→12V

V_EN/SS=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

31/37

XCL230/XCL231 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(19) EN/SS Rising Response (XCL231)

XCL231B0K1H2

V_IN=24V, V_EN/SS=0V→24V(tr=50μs), V_OUT=3.3V, I_OUT=300mA

XCL231B0K1H2

V_IN=12V, V_EN/SS=0V→12V(tr=50μs), V_OUT=3.3V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_EN/SS=0V→12V

V_EN/SS=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

XCL231B0K1H2

V_IN=12V, V_EN/SS=0V→12V(tr=50μs), V_OUT=5.0V, I_OUT=300mA

XCL231B0K1H2

V_IN=24V, V_EN/SS=0V→24V(tr=50μs), V_OUT=5.0V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_EN/SS=0V→12V

V_EN/SS=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

32/37

XCL230/XCL231

Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(20) V_INRising Response (XCL230)

XCL230B0K1H2

V_IN=0V→24V(tr=50μs), V_EN/SS=V_IN, V_OUT=3.3V, I_OUT=300mA

XCL230B0K1H2

V_IN=0V→12V(tr=50μs),V_EN/SS=V_IN, V_OUT=3.3V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=0V→12V

V_IN=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

XCL230B0K1H2

V_IN=0→24V(tr=50μs), V_EN/SS=V_IN, V_OUT=5.0V, I_OUT=300mA

XCL230B0K1H2

V_IN=0→12V(tr=50μs), V_EN/SS=V_IN, V_OUT=5.0V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=0V→12V

V_IN=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

33/37

XCL230/XCL231 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(20) V_INRising Response (XCL231)

XCL231B0K1H2

V_IN=0→12V(tr=50μs), V_EN/SS=V_IN, V_OUT=3.3V, I_OUT=300mA

XCL231B0K1H2

V_IN=0→24V(tr=50μs), V_EN/SS=V_IN, V_OUT=3.3V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=0V→12V

V_IN=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

XCL231B0K1H2

V_IN=0→12V(tr=50μs), V_EN/SS=V_IN, V_OUT=5.0V, I_OUT=300mA

XCL231B0K1H2

V_IN=0→24V(tr=50μs), V_EN/SS=V_IN, V_OUT=5.0V, I_OUT=300mA

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

C_IN1=4.7μF(UMK212BBJ475KG), C_IN2=0.1μF(UMK107BJ104MAHT)

C_L=22μF(TMK212BBJ226MG)

V_IN=0V→12V

V_IN=0V→24V

V_OUT: 2V/div

1.0ms/div

V_OUT: 2V/div

1.0ms/div

34/37

XCL230/XCL231

Series

■PACKAGING INFORMATION

For the latest package information go to, www.torex.co.jp/technical-support/packages/

PACKAGE

OUTLINE / LAND PATTERN

THERMAL CHARACTERISTICS

JESD51-7 Board DFN3030-10B Power Dissipation

DFN3030-10B

DFN3030-10B PKG

35/37

XCL230/XCL231 Series

■MARKING RULE

●DFN3030-10B

Mark ①,②, represents product series, products type.

SYMBOL

Product

Type

PRODUCT NAME

Number

①

②

T

N

T

XCL230

XCL231

B

XCL230B0K1H2

XCL231B0K1H2

Mark ③,④, represents production lot number.

01~09, 0A~0Z, 11~9Z, A1~A9, AA~B1~ZZ, repeated.

(G，I，J，O，Q，W excluded) No character inversion used.

36/37

XCL230/XCL231

Series

1. The product 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. The information in this datasheet is intended to illustrate the operation and characteristics of our

products. We neither make warranties or representations with respect to the accuracy or

completeness of the information contained in this datasheet nor grant any license to any intellectual

property rights of ours or any third party concerning with the information in this datasheet.

3. Applicable export control laws and regulations should be complied and the procedures required by

such laws and regulations should also be followed, when the product or any information contained in

this datasheet is exported.

4. The product is neither intended nor warranted for use in equipment of systems which require

extremely high levels of quality and/or reliability and/or a malfunction or failure which may cause loss

of human life, bodily injury, serious property damage including but not limited to devices or equipment

used in 1) nuclear facilities, 2) aerospace industry, 3) medical facilities, 4) automobile industry and

other transportation industry and 5) safety devices and safety equipment to control combustions and

explosions. Do not use the product for the above use unless agreed by us in writing in advance.

5. Although we make continuous efforts to improve the quality and reliability of our products;

nevertheless Semiconductors are likely to fail with a certain probability. So in order to prevent personal

injury and/or property damage resulting from such failure, customers are required to incorporate

adequate safety measures in their designs, such as system fail safes, redundancy and fire prevention

features.

6. Our products are not designed to be Radiation-resistant.

7. Please use the product listed in this datasheet within the specified ranges.

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

Semiconductor Ltd in writing in advance.

TOREX SEMICONDUCTOR LTD.

37/37


型号：	XCL231B0K1H2
厂家：	Torex Semiconductor
描述：	36V, 600mA Inductor Built-in Step-down âmicro DC/DCâ Converter
文件：	总37页 (文件大小：1494K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

XCL231B0K1H2 [TOREX]

相关型号：

XCL303

XCL303A052KR-G

XCL304

XCL304A052KR-G

XCLA00811001C

XCLA00811102B

XCLA00812702C

XCLA00817401B

XCLA0082100BF

XCLA0082430BD

XCLA00828001B

XCLA00844202F