8A 180KHz 40V Buck DC to DC Converter XL4016 Features

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8A 180KHz 40V Buck DC to DC Converter XL4016

Features n Wide 8V to 40V Input Voltage Range n Output Adjustable from 1.25V to 36V n Maximum Duty Cycle 100% n Minimum Drop Out 0.3V n Fixed 180KHz Switching Frequency n 8A Constant Output Current Capability n Internal Optimize Power MOSFET n High e fficiency up to 96% n Excellent line and load regulation n Built in thermal shutdown function n n n n

Built in current limit function

Built in output short protection function

Built in input over voltage protection

Available in TO220-5L package

Applications n LCD Monitor and LCD TV n Portable instrument power supply n Telecom / Networking Equipment

General Description

The XL4016 is a 180 KHz fixed frequency

PWM buck (step-down) DC/DC converter, capable of driving a 8A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal and a frequency compensation fixed-frequency oscillator.

The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An over current protection function is built inside.

When short protection function happens, the operation frequency will be reduced from

180KHz to 48KHz. An internal compensation block is built in to minimize external component count.

Figure1. Package Type of XL4016

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8A 180KHz 40V Buck DC to DC Converter XL4016

Pin Configurations

Table 1 Pin Description

Figure2. Pin Configuration of XL4016 (Top View)

Pin Number Pin Name Description

1

2

3

4

5

GND

FB

SW

VC

VIN

Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL4016.

Feedback Pin (FB). Through an external resistor divider network, FB senses the output voltage and regulates it. The feedback threshold voltage is 1.25V.

Power Switch Output Pin (SW). SW is the switch node that supplies power to the output.

Internal Voltage Regulator Bypass Capacity. In typical system application, The VC pin connect a 1uf capacity to VIN.

Supply Voltage Input Pin. XL4016 operates from a 8V to 40V

DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.

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8A 180KHz 40V Buck DC to DC Converter XL4016

Function Block

Figure3. Function Block Diagram of XL4016

Typical Application Circuit

Figure4. XL4016 Typical Application Circuit (VIN=8V~40V, VOUT=5V/8A)

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8A 180KHz 40V Buck DC to DC Converter XL4016

Ordering Information

Package

Temperature

Range

Part Number

Lead Free

XL4016E1

Marking ID

Lead Free

XL4016E1

Packing Type

XLSEMI Pb-free products, as designated with “E1” suffix in the par number, are RoHS compliant.

Tube

Absolute Maximum Ratings（Note1）

Input Voltage

Parameter Symbol

Vin

Value

-0.3 to 45

Unit

V

Feedback Pin Voltage

Output Switch Pin Voltage

Power Dissipation

V

FB

V

Output

P

D

-0.3 to Vin

-0.3 to Vin

Internally limited

V

V mW

Thermal Resistance (TO220-5L)

(Junction to Ambient, No Heatsink, Free Air)

R

JA

30 ºC/W

Operating Junction Temperature

Storage Temperature

Lead Temperature (Soldering, 10 sec)

ESD (HBM)

T

T

J

STG

T

LEAD

-40 to 125

-65 to 150

260

>2000

ºC

ºC

ºC

V

Note1: Stresses greater than those listed under Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

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8A 180KHz 40V Buck DC to DC Converter XL4016

XL4016 Electrical Characteristics

T a

= 25℃;unless otherwise specified.

Symbol Parameter Test Condition Min. Typ. Max. Unit

System parameters test circuit figure4

VFB

Efficiency

Efficiency

Feedback

Voltage ŋ ŋ

Vin = 8V to 40V, Vout=5V

Iload=0.5A to 8A

Vin=12V ,Vout=5V

Iout=6A

Vin=24V ,Vout=12V

Iout=6A

1.225 1.25 1.275 V

-

-

87

93

-

-

%

%

Electrical Characteristics (DC Parameters)

Vin = 12V, GND=0V, Vin & GND parallel connect a 470uf/50V capacitor; Iout=500mA, T a

=

25℃; the others floating unless otherwise specified.

Parameters Symbol Test Condition Min. Typ. Max. Unit

Input operation voltage Vin 8 40 V

Quiescent Supply Current I q

V

FB

=Vin 2.1 5 mA

Oscillator Frequency Fosc 144 180 216 KHz

Output Short Frequency

Switch Current Limit

Max. Duty Cycle

Output Power PMOS

Vin Over Voltage Protection

Fosp

I

L

D

MAX

Rdson

OVP

V

FB

=0

V

FB

=0V

V

FB

=0V, Vin=12V,

I

SW

=8A

48

10

100

40 50 mohm

45

KHz

A

%

V

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8A 180KHz 40V Buck DC to DC Converter XL4016

Typical System Application (VOUT=5V/8A)

Figure5. XL4016 System Parameters Test Circuit (VIN=8V~40V, VOUT=5V/8A)

Efficiency VS Load current

100

95

90

85

80

75

70

65

60

Vin=8V,Vout=5V

Vin=12V,Vout=5V

Vin=24V,Vout=5V

Vin=36V,Vout=5V

55

50

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0

Load current(A)

Figure6. XL4016 System Efficiency Curve

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8A 180KHz 40V Buck DC to DC Converter XL4016

Typical System Application (VOUT=12V/6A)

Figure7. XL4016 System Parameters Test Circuit (VIN=15V~40V, VOUT=12V/6A)

Efficiency VS Load current

100

95

90

85

80

75

70

65

Vin=15V,Vout=12V

Vin=24V,Vout=12V

Vin=36V,Vout=12V

60

55

50

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Load current(A)

Figure8. XL4016 System Efficiency Curve

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8A 180KHz 40V Buck DC to DC Converter XL4016

Schottky Diode Selection Table

Current Surface

Mount

Through

Hole

VR (The same as system maximum input voltage)

1A √

20V

1N5817

30V

1N5818

40V

1N5819

50V

√ 1N5820 1N5821 1N5822

√

√ MBR320 MBR330 MBR340 MBR350 MBR360

SK32 SK33 SK34 SK35

60V

SK36

3A

√

√

30WQ03 30WQ04 30WQ05

31DQ03 31DQ04 31DQ05

√

√

SR302

1N5823

SR303

1N5824

SR304 SR305

1N5825

SR306

√ SR502 SR503 SR504 SR505 SR506

5A

√

√ SB520 SB530 SB540 SB550

50WQ03 50WQ04 50WQ05

SB560

8A √ SR820 SR830 SR840 SR850 SR860

16A √ SR1620 SR1630 SR1640 SR1650 SR1660

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8A 180KHz 40V Buck DC to DC Converter XL4016

Package Information

TO220-5L

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