xcl231b0k1h2 evaluation board user manualtest result (1) output voltage vs output current @ta=25 (2)...

XCL231B0K1H2 Evaluation Board User Manual

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

CAUTIONENGINEERING EVALUATION PURPOSES ONLY

This evaluation board is made for the purpose of the product evaluation.It is strictly prohibited to use this evaluation board for any other purpose.

Torex Semiconductor does not guarantee that all samples will perform in exactly the same way and we recommend that you always consult our product data sheets for the minimum and maximum specifications.

It is also important that you evaluate all our products carefully before mass

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Evaluation Board Picture

Evaluation Board SPEC

XCL230/XCL231 Series Features

・ Input Voltage Range ・・・・・・・・・・・・・・・・・・ 3.6V ~ 36.0V

・ Output Voltage Range ・・・・・・・・・・・・・・・・・・ 1.0V ~ 5.0V

・ Max Output Current ・・・・・・・・・・・・・・・・・・ 600mA max.

・ Switching frequency ・・・・・・・・・・・・・・・・・・ 1.2MHz

・ Max Duty Cycle ・・・・・・・・・・・・・・・・・・ 100%

・ Small Solution Size

・ Low EMI Noise

・ Built-in Inductor

・ Sequence Control is possible. (Power Good and Soft Start functions)

XCL231B0K1H2 Evaluation Board

1 / 11XCL231B0K1H-3.3V-EVB-01

Ta=25℃

CONDITON. MIN. TYP. MAX. UNIT

Vin Input Voltage Range - 3.0 - 36.0 V

Vout Setting Output Voltage - - 5.0 - V

Iout Output Current - 0.0 - 600.0 mA

fosc Switching frequency - - 1.2 - MHz

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Quick Start Procedure


2 / 11XCL231B0K1H-3.3V-EVB-01

A

Vout

Rout

Multimeter

VMultimeter

Iout

Vin

V

AMultimeter

Multimeter

DC Power Supply

Iin

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Schematic

BOM

Required Circuit Component

Additional Demo Board Circuit ComponentsManufacture

RPG 100kΩ Resistor - -

3.3V 510kΩ 150kΩ 22pF

TDK

Vout Setting TableVout Setting RFB1 RFB2 CFB

Item Value

RFB1 510kΩ Resistor 1005 -

CL2 10uF Ceramic cap., 10V 2012

-

Item Value Description


IC

1608 C1608X7R1H104K080AE

-

RSS Jumper Resistor - - -

CSS - -

C2012X7R1A106K125AC

CFB 22pF Ceramic cap. , 50V, CH

3 / 11XCL231B0K1H-3.3V-EVB-01

Resistor 1005 -

CBLK 10uF Ceramic cap., 50V/10uF 3225 CGA6P3X7S1H106K

1005

RFB2 150kΩ

Size [mm] Part Number

5.0V 680kΩ 120kΩ 15pF

CIN1 4.7uF Ceramic cap., 50V 2012 C2012X7R1H475K125AC TDK

CIN3 0.1uF Ceramic cap., 50V

- -

Manufacture

- Step-Down micro DC/DC Converters DFN3030-10B XCL231B0K1H2 TOREX

TDK

TDK

-

-

-

Description Size [mm] Part Number

TDK

CIN2 4.7uF Ceramic cap., 50V 2012 C2012X7R1H475K125AC TDK

CL1 10uF Ceramic cap., 10V 2012 C2012X7R1A106K125AC

CIN1-3

VIN

L1

GND

L2

CL1

VOUT

GND

IC

EN/SS

EN/SS

CBLK

LX PG

CL2

FB

PG

VPULL

RPG

CFB

RFB1

RFB2

VIN

CSS

RSS

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PCB Layout

Layer 1 Layer 2

Layer 3 Layer 4


XCL231B0K1H-3.3V-EVB-01 4 / 11

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Test Result

(1) Output Voltage vs Output Current @Ta=25℃

(2) Efficiency vs Output Current Ta=25℃

(3) Ripple Voltage vs Output Current Ta=25℃

5 / 11XCL231B0K1H-3.3V-EVB-01


0

20

40

60

80

100

0.1 1 10 100 1000

Eff

icie

ncy : E

FF

I (%

)

Output Current : IOUT (mA)

Vin=5V

Vin=8V

Vin=12V

Vin=24V

3.1

3.2

3.3

3.4

3.5

0.1 1 10 100 1000

Outp

ut V

oltage : V

OU

T (

V)


Vin=5V

Vin=8V

Vin=12V

Vin=24V

0

50

100

150

200

0.1 1 10 100 1000

Rip

ple

Vo

lta

ge

: V

r (m

V)


Vin=5V

Vin=8V

Vin=12V

Vin=24V

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Test Result

(4) Output Voltage Waveform @ Ta=25℃

(4-1) Vin = 12V, Iout = 1mA (4-2) Vin = 12V, Iout = 300mA


6 / 11XCL231B0K1H-3.3V-EVB-01


100us/div

Lx (5V/div)

Vout (10mV/div)

400ns/div

Lx (5V/div)

Vout (10mV/div)

400ns/div Lx (5V/div)

Vout (10mV/div)

100us/div Lx (5V/div)

Vout (10mV/div)

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Test Result

(5) Start-up Waveform @ Ta=25℃



XCL231B0K1H-3.3V-EVB-01 7 / 11


1ms/div

Vout (2V/div)

CE(5V/div)

Input Current(100mA/div)

1ms/div

Vout (2V/div)

CE(5V/div)


1ms/div

Vout (2V/div)

CE(5V/div)


1ms/div

Vout (2V/div)

CE(5V/div)


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Test Result

(6) Load Transient Waveform @ Ta=25℃

(6-1) Vin = 12V, Iout = 1mA ⇔ 200mA

(6-2) Vin = 24V, Iout = 1mA ⇔ 200mA


XCL231B0K1H-3.3V-EVB-01 8 / 11

400us/div

Vout (200mV/div)

Output Current (100mA/div)

400us/div

Vout (200mV/div)

Output Current (100mA/div)

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Test Result

(7) Radiation EMI : VCCI 10mCondition

IC : XCL230B0K1H2-GVin : 12VVout : 5VIout : 300mA

XCL231B0K1H-3.3V-EVB-01 9 / 11


30 100050 100 5000

70

10

20

30

40

50

60

周波数

レベル

[MHz]

[dB(μ V/m)]

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【Appendix】 How to calculate DC/DC Converter or DC/DC Controller.

It can be calculated by the following "WEB DC/DC Simulation".

日本語 :English :简体中文 :


10 / 11

https://www.torex.co.jp/technical-support/dcdc-simulation/https://www.torexsemi.com/technical-support/dcdc-simulation/https://www.torex.com.cn/technical-support/dcdc-simulation/

XCL231B0K1H-3.3V-EVB-01

www.torex.co.jp

https://www.torex.co.jp/technical-support/dcdc-simulation/

https://www.torexsemi.com/technical-support/dcdc-simulation/

https://www.torex.com.cn/technical-support/dcdc-simulation/


【Appendix】 How to reduce the spike noise caused by measurement (Probing method with oscilloscope)

* Condition : XC9236, Vin=3.6V/Vout=1.8V/100mA

English : https://www.torexsemi.com/technical-support/tips/reduction-spike-noise/日本語 : https://www.torex.co.jp/technical-support/tips/reduction-spike-noise/


XCL231B0K1H-3.3V-EVB-01 11 / 11

1us/div 1us/div

Vout (10mV/div) Vout (10mV/div)

Vout

GND

GND

Vout

Probing method : Before improvement Probing method : After

OutputCapacitor

Spike Noise : 35mV

Spike Noise: 10mV

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https://www.torexsemi.com/technical-support/tips/reduction-spike-noise/

https://www.torex.co.jp/technical-support/tips/reduction-spike-noise/

xcl231b0k1h2 evaluation board user manualtest result (1) output voltage vs output current @ta=25 (2)...

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