LR8N3-GP005 [SUPERTEX]

Adjustable Positive Standard Regulator,;


型号：	LR8N3-GP005
厂家：	Supertex, Inc
描述：	Adjustable Positive Standard Regulator, 输出元件调节器
文件：	总10页 (文件大小：918K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Supertex inc.

LR8

High Input Voltage,

Adjustable 3-Terminal Linear Regulator

Features

General Description

► 13.2 - 450V input voltage range

► Adjustable 1.20 - 440V output regulation

► 5% output voltage tolerance

► Output current limiting

The Supertex LR8 is a high voltage, low output current, adjustable

linear regulator. It has a wide operating input voltage range of

13.2 - 450V. The output voltage can be adjusted from 1.20 - 440V

provided that the input voltage is at least 12V greater than the

output voltage. The output voltage can be adjusted by means of

two external resistors R1 and R2 as shown in the typical application

circuits. The LR8 regulates the voltage difference between VOUT

and ADJ pins to a nominal value of 1.20V. The 1.20V is ampliﬁed

by the external resistor ratio R1 and R2. An internal constant

bias current of typically 10µA is connected to the ADJ pin. This

increases V_OUTby a constant voltage of 10µA times R2.

► 10µA typical ADJ current

► Internal junction temperature limiting

Applications

► Off-line SMPS startup circuits

► Adjustable high voltage constant current source

► Industrial controls

► Motor controls

The LR8 has current limiting and temperature limiting. The output

current limit is typically 20mA and the minimum temperature limit

is 125°C. An output short circuit current will therefore be limited

to 20mA. When the junction temperature reaches its temperature

limit, the output current and/or output voltage will decrease to

keep the junction temperature from exceeding its temperature

limit. For SMPS start-up circuit applications, the LR8 turns off

when an external voltage greater than the output voltage of the

LR8 is applied to VOUT of the LR8. To maintain stability, a bypass

capacitor of 1.0µF or larger and a minimum DC output current of

500µA are required.

► Battery chargers

► Power supplies

The device is available in TO-243AA (SOT-89), TO-252 (D-PAK),

and TO-92 packages.

Typical Application Circuit

V_OUT

VIN

VOUT

V_IN

R₁

ADJ

C₁

C₂

LR8

R_LOAD

R₂

* Required for conditions where V_INis less than V_OUT

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

Ordering Information

Pin Conﬁguration

Part Number

Package Options

Packing

VOUT

LR8K4-G

TO-252 (D-PAK)

TO-92

2000/Reel

1000/Bag

2000/Reel

ADJ

LR8N3-G

VIN

LR8N3-G P002

LR8N3-G P003

LR8N3-G P005

LR8N3-G P013

LR8N3-G P014

LR8N8-G

TO-92

ADJ

VOUT

TO-92

TO-252 (D-PAK)

TO-92

VOUT

TO-92

ADJ

VOUT

TO-243AA (SOT-89)

VIN

-G denotes a lead (Pb)-free / RoHS compliant package

TO-243AA (SOT-89)

Absolute Maximum Ratings

Parameter

Product Marking

Value

YY = Year Sealed

WW = Week Sealed

L = Lot Number

Si YYWW

LR8K4

LLLLLLL

V_INinput voltage (voltages ref to ADJ)

Output voltage range

-0.5V to +480V

-0.5V to +470V

-40°C to +85°C

-40°C to +125°C

-65°C to +150°C

= “Green” Packaging

Operating ambient temperature range

Operating junction temperature range

Storage temperature range

Package may or may not include the following marks: Si or

TO-252 (D-PAK)

Y = Last Digit of Year Sealed

SiLR

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent

damage to the device. These are stress ratings only, and functional operation of the

device at these or any other conditions beyond those indicated in the operational sections

of the speciﬁcations is not implied. Exposure to absolute maximum rating conditions for

extended periods may affect device reliability.

W = Code for Week Sealed

L = Lot Number

YWLL

= “Green” Packaging

Package may or may not include the following marks: Si or

TO-92

Typical Thermal Resistance

W = Code for Week Sealed

LR8W

Package

θ_ja

= “Green” Packaging

Package may or may not include the following marks: Si or

TO-243AA (SOT-89)

TO-252 (D-PAK)

TO-92

81^OC/W

132^OC/W

133^OC/W

TO-243AA (SOT-89)

Electrical Characteristics

(Test conditions unless otherwise speciﬁed: -40°C < T_A< 85°C.)

Sym

Parameter

Min

Typ

Max Units Conditions

V_IN- V_OUTInput to output voltage difference

450

1.26

425

---

13.2V < V_IN< 400V,

R₁= 2.4kΩ, R₂= 0

1.14

375

1.20

400

V_OUT

Overall output voltage regulation

R₁= 2.4kΩ, R₂= 782kΩ

17V < V_IN< 400V, V_OUT= 5V,

I_OUT= 0.5mA

ΔV_OUT

Line regulation

0.003

0.01

%/V

V_IN= 17V, V_OUT= 5V,

0.5mA <I_OUT< 10mA

Load regulation

1.4

3.0

V_IN= 17V, V_OUT= 5V, I_OUT= 10mA,

-40°C < T_A< 85°C

Temperature regulation

-1

mA T_J< 85°C, V_IN- V_OUT= 12V

mA T_J> 125°C, V_IN- V_OUT= 450V

I_OUT

Output current limit

0.5

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

Electrical Characteristics (cont.)

(Test conditions unless otherwise speciﬁed: -40°C < T_A< 85°C.)

Sym

I_OUT

I_ADJ

Parameter

Min

Typ

0.3

Max Units Conditions

Minimum output current

Adjust output current

Minimum output load capacitance

0.5

mA Includes R1 and load current

5.0

1.0

µA

µF

°C

---

DV_OUT/DV_INRipple rejection ratio

T_LIMITJunction temperature limit

120Hz, V_OUT= 5V

---

125

Thermal Characteristics

Power Dissipation

θ_jc

°C/W

θ_ja

°C/W

Package

@ T_A= 25°C

0.74W

1.6W

TO-92

125

170

78^†

50^†

TO-243AA

TO-252

2.5W

6.25

Note:

†

Mounted on FR4 board, 25mm x 25mm x 1.57mm.

Functional Block Diagram

Pass

VOUT

ADJ

VIN

Element

Overtemp &

Overcurrent

1.2V

10µA

LR8

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

Typical Application Circuits

Figure 1: High Input Voltage, 5.0V Output Linear Regulator

_OUT= 5.0V

V_IN=

17 to 450V

VIN

VOUT

ADJ

R₁

6.04kΩ

LR8

C₂

1.0µF

C₁

R_LOAD≤16.5kΩ

R₂

18.2kΩ

R₂

V_OUT= 1.20V 1+

+ I_ADJ

* Required for conditions where V_INis less than V_OUT

R₁

Figure 2: SMPS Start-Up Circuit

V_IN= (V_OUT+ 12V) to 450V

V_AUXILIARY

V_OUT

VIN

VOUT

_OUT1

LR8 ADJ

V_CC

PWM IC

Figure 3: High Voltage Adjustable Constant Current Source

1.20V

I_OUT

VIN

VOUT

LR8 ADJ

V_IN=

Load

(V_OUT+ 12V) to 450V

1.0µF

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

Typical Performance Curves

Temperature Variation

1.30

1.25

1.20

1.15

1.10

V_IN

V_OUT= 1.2V

LR8

ADJ

12V

2.4k

1.0µF

1.05

1.00

-50

-25

100

125

T (junction) (^OC)

Adjustment Current

V_IN

V_{OUT = 1.2V}

LR8

V_IN= 400V

_IN= 12V

ADJ

12V,

200V

400V

1.0ΩF

2.4kΩ

I_ADJ

V_IN= 200V

-50

-25

100

125

T (junction) (^OC)

Load Regulation

5.2

5.1

5.0

V_IN

V_OUT= 5.0V

I_OUT

LR8

6.04kΩ

ADJ

25V

1.0µF

R_LOAD

18.2kΩ

4.9

4.8

I_OUT(mA)

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

Typical Performance Curves (cont.)

V_OUTvs. V_IN

V_OUT= 5.0V

V_IN

LR8

6.04kΩ

±±1

ADJ

±kΩ

R_LOAD

±.0µF

0V to 50V

±8.2kΩ

±±1

±0

V_IN(V)

Ripple Rejection

-65

-64

-63

-62

I_OUT

V_IN

V_OUT= 5.0V

LR8

ADJ

6.04kΩ

±1

20V_P-P

@ 60Hz

±.0µF

65V

±8.2kΩ

±1

-6±

-60

±0

I_OUT(mA)

±5

±0

-40

-20

±00

Temperature (^OC)

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

Typical Performance Curves (cont.)

Load Transient Response

V_OUT= 5.0V

V_IN

LR8

Closed

Open

6.04kΩ

±±1

ADJ

±.0µF

±0kΩ

25V

±8.2kΩ

±±1

532Ω

V_OUT

Load Transient Response

Line Transient Response

400V

V_IN

V_OUT= 5.0V

V_IN

400V

V_IN

LR8

6.04kΩ

±±1

ADJ

±.0µF

±0kΩ

±8.2kΩ

±±1

V_OUT

Line Transient Response

400V

V_IN

5.0V

V_OUT

Line Power Down Transient

Line Power Up Transient

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

3-Lead TO-252 D-PAK Package Outline (K4)

θ1

Note 1

View B

Front View

Rear View

Side View

Gauge

Plane

A1 Seating

Plane

View B

Note:

1. Although 4 terminal locations are shown, only 3 are functional. Lead number 2 was removed.

Symbol

.086 .000* .025 .030 .195 .018 .235 .205 .250 .170

.240

θ1

0^O

MIN

.370 .055

.060

.410 .070

.035 .025* .035^†0^O

Dimen-

sion

(inches)

.090

BSC

.108 .020

REF BSC

NOM

MAX .094 .005 .035 .045 .215 .035 .245 .217* .265 .200*

.050 .040 .060 10^O15^O

JEDEC Registration TO-252, Variation AA, Issue E, June 2004.

* This dimension is not speciﬁed in the JEDEC drawing.

†

This dimension differs from the JEDEC drawing.

Drawings not to scale.

Supertex Doc. #: DSPD-3TO252K4, Version F040910.

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

3-Lead TO-92 Package Outline (N3)

Seating

Plane

Side View

Front View

Bottom View

Symbol

.170

.014^†

.175

.125

.080

.045

.500

MIN

NOM

MAX

.014^†

.095

Dimensions

(inches)

.210

.022^†

.205

.165

.105

.055

.610*

JEDEC Registration TO-92.

* This dimension is not speciﬁed in the JEDEC drawing.

† This dimension differs from the JEDEC drawing.

Drawings not to scale.

Supertex Doc.#: DSPD-3TO92N3, Version E041009.

Doc.# DSFP-LR8

B080113

Supertex inc.

www.supertex.com

LR8

3-Lead TO-243AA (SOT-89) Package Outline (N8)

Top View

Side View

Symbol

1.40

0.44

0.36

0.35

1.62

2.00^†

3.94

0.73^†

MIN

NOM

MAX

4.40

2.29

Dimensions

(mm)

1.50

BSC

3.00

BSC

1.60

0.56

0.48

0.44

4.60

1.83

2.60

2.29

4.25

1.20

JEDEC Registration TO-243, Variation AA, Issue C, July 1986.

† This dimension differs from the JEDEC drawing

Drawings not to scale.

Supertex Doc. #: DSPD-3TO243AAN8, Version F111010.

(The package drawing(s) in this data sheet may not reﬂect the most current speciﬁcations. For the latest package outline

information go to http://www.supertex.com/packaging.html.)

Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives

an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability

to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and

specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com)

Supertex inc.

1235 Bordeaux Drive, Sunnyvale, CA 94089

Tel: 408-222-8888

www.supertex.com

Doc.# DSFP-LR8

B080113

LR8N3-GP005 [SUPERTEX]

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