WL2817DA12-8/TR_技术文档

WL2817DA

Http://www.sh-willsemi.com

Ultra low dropout, 500mA/1A, CMOS LDO

Descriptions

The WL2817DA series are ultra low dropout, Low

quiescent current, high PSRR CMOS LDO.

Using CMOS construction, the quiescent current

consumed by the WL2817DA is typically 160uA over

the entire input voltage range, making it attractive for

consumer, networking applications that demand high

output current. The WL2817DA series are available in

wide output voltage range version from 1.0V to 3.3V.

DFN1612-8L

The WL2817DA series offer thermal shutdown (OTP)

and current limit functions, to assure the stability of

chip and power system at wrong condition, and it uses

trimming technique to guarantee output voltage

accuracy within ±2%.

The WL2817DA series can choose the output current

limit between 1.0A or 500mA by alternating the LCON

pin between “H” or “L”.The WL2817DA regulators are

available in DFN1612-8L packages. Standard products

are Pb-free and Halogen-free.

Pin Configuration (Top View)

Features



Input voltage

: 2.5V~5.5V



Output voltage range :1.0V 1.1V 1.2V 1.5V 1.8V

2.7V 2.8V 2.9V 3V 3.3V



Output current

PSRR

: 500mA/1A

: 60dB(@ V_OUT=3V)

B

*

= Device code (3.0V)

Dropout voltage : 70mV @ I_OUT=0.5A

Output noise : 50μV_RMS

Quiescent current : 160μA Typ.

= Month code (N: 2015.01,

O:2015.02, and so on)

Marking

Applications



LCD TV

Order Information

For detail information, Please refer to page 15.

STB

Computer, Graphic card

Network communication equipments

Others portable electronics devices

Will Semiconductor Ltd.

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Apr. 2019 – Rev1.8

WL2817DA

Typical Application

Pin Description

Symbol Description

1

V_OUT

Output

2

Output Current Limit Alternate

3

LCON

Pin（“H”=1A，“L”=500mA）

4

5

6

7

8

outsense Feedback Pin

GND

CE

Ground

Min.

Typ.

4.7uF

1uF

Max.

Enable, Active High

Input

C_IN

V_IN

C_OUT

V_IN

Input

Block Diagram

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Apr. 2019 – Rev1.8

WL2817DA

Absolute Maximum Ratings

Parameter

Symbol

V_IN

Value

Unit

Input voltage range

EN voltage range

-0.3～6.5

V

V_EN

-0.3～V_IN

625

LCON voltage range

Output voltage range

Power dissipation *¹

Thermal resistance

Junction temperature

Lead temperature(10s)

Storage temperature

V_LCON

V_OUT

P_D

V

mW

^oC/W

^oC

V

R_θJA

T_J

165

150

T_L

260

Tstg

HBM

MM

-55 ~ 150

2000

ESD Ratings

200

V

Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum

Ratings” may cause substantial damage to the device. Functional operation of this device at other conditions

beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may

affect device reliability.

*1: Power dissipation is calculate by P_D= (V_IN-V_OUT) x I_OUT

Recommend Operating Ratings

Parameter

Symbol

V_IN

Value

Unit

V

^oC

Operating Supply voltage

Operating Temperature Range

2.5～5.5

-40～85

Topr

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Apr. 2019 – Rev1.8

WL2817DA

Electronics Characteristics (Ta=25^oC, V_IN=V_OUT+1V, C_IN=4.7uF, C_OUT=1uF，I_OUT=1mA，

LCON=EN=V_IN，unless otherwise noted)

Parameter

Symb

ol

Condition

Min.

Typ.

Max.

Unit

T=25℃

Voset*0.98 Voset

Voset*1.02

Voset*1.03

V

Output Voltage

Current Limit

V_OUT

-40℃≤T≤85℃

Voset*0.97 Voset

LCON=“H”

LCON=“L”

1

A

I_LIM

V_IN=Vset+0.5V

0.5

V_OUT=V_OUT*0.9

7

Dropout Voltage

V_DROP

70

3.5

1.5

mV

I_OUT=0.5A

LCON=“H”：

1mA≤I_OUT≤1A

LCON=“L”：

1mA≤I_OUT≤0.5A

Load Regulation

△V_Load

V_IN=Vset+0.5V

UVLO

2

5

V

mV

uA

V_uvlo

Line Regulation

Quiescent Current

Shut-down Current

V_OUTTemperature

Coefficient

△V_LINEVset+0.5V≤V_IN≤5.5V（V_IN≥UVLO）

10

220

3

I_OUT=0

I_Q

160

1

I_SHDN

ΔV_OUT

ΔT

V_EN= 0V

uA

/

ppm/

℃

-40℃≤T≤85℃

100

LCON=“H”

LCON=“L”

LCON=“H”

LCON=“L”

160

80

mA

Short Current Limit

Inrush Current Limit

Reverse Current

I_sc

V_OUT=0V

CC mode

500

250

*1

I_rush

V_OUT=Voset+1V；EN=0；

*2

I_rev

4.5

10

uA

0≤V_IN≤Vrev_del

Detector offset

voltage in reverse

current protection

mode

*3

V_{rev_det}

V_OUT=Voset+1V；EN=0

0.5

V

Release offset

voltage in reverse

current protection

mode

*4

V_{rev_rel}

0.35

V

*5

Max reverse Current

Discharge resistance

Power Supply Ripple

Rejection

I_revmax

R_dis

V_OUT=Voset+1V；EN=0

EN=0

70

60

uA

Ω

V_IN=(V_OUT+1V)_DC+0.2V_P-P

F=1KHz ,I_OUT=10mA

PSRR

e_NO

60

dB

40

Output noise voltage

（V_OUT=3V）

BW=10Hz to 100KHz I_OUT=0

BW=10Hz to 100KHz I_OUT=10mA

BW=10Hz to 100KHz I_OUT=0

BW=10Hz to 100KHz I_OUT=10mA

V_IN=5.5V, I_OUT=1mA

μV_RMS

60

20

Output noise voltage

（V_OUT=1.0V）

EN logic high voltage

e_NO

μV_RMS

V

35

V_ENH

1.2

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Apr. 2019 – Rev1.8

WL2817DA

EN logic low voltage

EN pull-down current

LCON pull-down current

EN logic high voltage

EN logic low voltage

LCON logic high

voltage

V_ENL

I_en

V_IN=5.5V, I_OUT=0mA

0.4

V

uA

V

0.2

1

I_LCON

V_ENH

V_ENL

1.2

0.4

V

V_ENH

V

LCON logic low

voltage

V_ENL

0.4

Thermal shutdown

threshold

^oC

T_SD

165

30

Thermal shutdown

hysteresis

△ T_SD

*1: For CC (Constant Current) mode, please refer to Start-up Characteristics.

*2 *3 *4 *5: Please refer to reverse current protection mode

Start-up Characteristics

Constant slope circuit is included in the WL2817DA to prevent the overshoot of the output voltage. If inrush current

increases due to the large capacitance of C_OUT, the operation mode will be shift from Constant Slope (CS) mode to

Constant Current (CC) mode. The CC mode maintains a constant inrush current. In the CC mode, t_onvaries with the size

of C_OUTand the load current.

Reverse Current Protection Circuit

The WL2817DA include a Reverse Current Protection Circuit, which stop the reverse current from V_OUTpin to V_INpin

or GND pin when V_OUTbecomes higher than V_IN.

Following figure shows the load characteristics of each mode. When giving the V_OUTpin a constant voltage and

decreasing the V_INvoltage,the V_INvoltage will become lower than V_OUT-V_{rev_det}, the reverse current protection starts to

function to stop the load current. By increasing the V_INvoltage higher than V_OUT-V_{rev_rel}, the protection mode will be

released to let the load current to flow. When V_INvoltage is between V_OUTand V_{rev_det}, the parasitic diode between V_INpin

and V_OUTpin becomes forward direction. As a result, the current flows from V_OUTpin to V_INpin, and the maximum of the

current is I_revmax

.

Figure1.Detection/Release Threshold value of Reverse Current Protection

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Apr. 2019 – Rev1.8

WL2817DA

Typical characteristics (Ta=25^oC, V_IN=4V, V_OUT=3V，C_IN=4.7uF，C_OUT=1uF, unless otherwise noted)

200

180

160

140

120

IO=1mA

100

-40

-20

0

20

40

60

80

100

120

140

Temperature(^oC)

Quiescent current vs. Input voltage

Quiescent current vs. Temperature

3.04

80

75

70

65

60

55

50

3.03

3.02

3.01

3.00

2.99

2.98

2.97

2.96

IO=1mA

IO=500mA

-40

-20

0

20

40

60

80

100

120

140

-40

-20

0

20

40

60

80

100

120

140

Temperature(^oC)

Dropout Voltage vs. Temperature

Output Voltage vs. Temperature

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

LCON=1

LCON=0

-40

-20

0

20

40

60

80

100

120

140

Temperature(^oC)

Output voltage vs. Input voltage

Current Limit vs. Temperature

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Apr. 2019 – Rev1.8

WL2817DA

Short Current Limit vs. Temperature

Inrush Current Limit vs. Temperature

Output Voltage vs. Load Current

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Apr. 2019 – Rev1.8

WL2817DA

1.Start up

A：Different Load

LCON=0

LCON=1

V_IN=4V,I_OUT=0mA

V_IN=4V,I_OUT=100mA

V_IN=4V,I_OUT=300mA

V_IN=4V,I_OUT=0mA

V_IN=4V,I_OUT=100mA

V_IN=4V,I_OUT=600mA

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Apr. 2019 – Rev1.8

WL2817DA

B：Different Cout

V_IN=4V，C_OUT=1uF

LCON=0

LCON=1

V_IN=4V，C_OUT=1uF

V_IN=4V，C_OUT=4.7uF

V_IN=4V，C_OUT=10uF

V_IN=4V，C_OUT=4.7uF

V_IN=4V，C_OUT=10uF

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Apr. 2019 – Rev1.8

WL2817DA

V_IN=4V，C_OUT=22uF

V_IN=4V，C_OUT=47uF

V_IN=4V，C_OUT=100uF

V_IN=4V，C_OUT=22uF

V_IN=4V，C_OUT=47uF

V_IN=4V，C_OUT=100uF

2.Shut down

V_IN=4V，I_OUT=0mA

V_IN=4V，I_OUT=30mA

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Apr. 2019 – Rev1.8

WL2817DA

V_IN=4V，I_OUT=150mA

3.Load Step

V_IN=4V,I_OUT=50mA-100mA

V_IN=4V,I_OUT=1mA-250mA

V_IN=4V,I_OUT=1mA-500mA

V_IN=4V,I_OUT=1mA-1A

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Apr. 2019 – Rev1.8

WL2817DA

4.LCON Line Step

V_IN=4V，I_OUT=0mA

V_IN=4V，I_OUT=150mA

V_IN=4V，I_OUT=500mA

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Apr. 2019 – Rev1.8

WL2817DA

PACKAGE OUTLINE DIMENSIONS

DFN1612-8L

D

e

b

PIN 1

D2

TOP VIEW

BOTTOM VIEW

SIDE VIEW

Dimensions in Millimeters

Symbol

Min.

0.50

-

Typ.

0.55

Max.

0.60

0.05

A

A1

A3

D

-

0.15 Ref.

1.60

1.55

1.15

1.25

0.25

0.13

1.65

1.25

1.35

0.35

0.23

E

1.20

D2

E2

b

1.30

0.30

0.18

e

0.40 BSC

0.20

L

0.15

0.25

Recommend PCB Layout (Unit: mm)

Notes:

This recommended land pattern is for reference

purposes only. Please consult your manufacturing

group to ensure your PCB design guidelines are met.

Will Semiconductor Ltd.

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Apr. 2019 – Rev1.8

WL2817DA

TAPE AND REEL INFORMATION

Reel Dimensions

Tape Dimensions

P1

Quadrant Assignments For PIN1 Orientation In Tape

Q1

Q3

Q2

Q4

Q1

Q3

Q2

Q4

User Direction of Feed

RD

W

Reel Dimension

7inch

13inch

12mm

4mm

Q2

1

Overall width of the carrier tape

8mm

2mm

Q1

16mm

8mm

Q3

P1

Pitch between successive cavity centers

Q4

Pin1 Pin1 Quadrant

Will Semiconductor Ltd.

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Apr. 2019 – Rev1.8

WL2817DA

ORDER INFORMATION

Operating

Ordering No.

V_OUT(V)

1.0

Package

Marking

C*

Shipping

Temperature

3000/Tape and

Reel

WL2817DA10-8/TR

WL2817DA11-8/TR

WL2817DA12-8/TR

WL2817DA15-8/TR

WL2817DA18-8/TR

WL2817DA27-8/TR

WL2817DA28-8/TR

WL2817DA29-8/TR

WL2817DA30-8/TR

WL2817DA33-8/TR

DFN1612-8L

-40 ~ +85°C

3000/Tape and

Reel

1.1

J*

3000/Tape and

Reel

1.2

K*

3000/Tape and

Reel

1.5

L*

3000/Tape and

Reel

1.8

D*

3000/Tape and

Reel

2.7

M*

E*

3000/Tape and

Reel

2.8

3000/Tape and

Reel

2.9

N*

3000/Tape and

Reel

3.0

B*

3000/Tape and

Reel

3.3

I*

Will Semiconductor Ltd.

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Apr. 2019 – Rev1.8


型号：	WL2817DA12-8/TR
厂家：	WILLSEMI
描述：	Ultra low dropout, 500mA/1A, CMOS LDO
文件：	总15页 (文件大小：2916K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

WL2817DA12-8/TR [WILLSEMI]

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