FAN2519S285X Datasheet FAN2518S26X, FAN2518S27X, FAN2518S25X | P1-P3

March 2014 Rev. 1.0 www.microsemi.com 1

1.5 Amp Negative Adjustable Regulator

Typical Application

C

2

5 µF

SOLID

TANTALUM

C

3

1 µF

SOLID

TANTALUM

*R2 = R1(│V

OUT

│/1.25V-1)

-V

IN

R2*

R1

121W

+ +

-V

OUT

= 1.25 V (1+R2/R1)V

IN

SGR137A

V

OUT

ADJ

Figure 1 · Typical Application

Features

 1% Output Voltage Tolerance

 0.01%/V Line Regulation

 0.5% Load Regulation

 0.02%/W Thermal Regulation

 Available in Hermetic TO-220

High Reliability Features -

SGR137/SGR137A

 Rad-tolerance:(Test data available)

 TID to a Minimum of 50krad(Si)

 ELDRS to a Minimum of 50krad(Si)

 SEL Immunity to a Minimum of 87MeV-cm

2

/mg

Description

The SGR137/SGR137A is fit, form and function

compatible to the SG137/SG137A with the addition of

guaranteed performance after radiation exposure to

Total Ionizing Dose (TID), Enhanced Low Dose Rate

Sensitivity (ELDRS), and Single Event Latch-up (SEL)

conditions. The SGR137A family of negative

adjustable regulators deliver up to 1.5A output current

over an output voltage range of -1.2V to -37V. The

device includes significant improvements, such as

better line and load regulation, and a maximum output

voltage error of 1%. The SGR137 family uses the

same chip design and guarantees maximum output

voltage error of ±2%.

Every effort is made to make these devices easy to use

and difficult to damage. Internal current and power

limiting coupled with true thermal limiting prevents

device damage due to overloads or shorts even if the

regulator is not fastened to a heat sink.

The SGR137/SGR137A family of products are ideal

complements to the SGR117A/117 adjustable positive

voltage regulators.

SGR137 / SGR137A

1.5 Amp Negative Adjustable Regulator

2

2% RESISTORS

12

OUTPUT VOLTAGE ERROR (%)

OUTPUT VOLTAGE

11

10

9

8

7

6

5

3

2

1

10

100

4

SGR137A

SGR137

2% RESISTORS

1% RESISTORS

2

4 6 20

40

Figure 2 · Resistor Precision vs. Output Voltage Error

Connection Diagrams and Ordering Information

* EV is Microsemi’s “Equivalent V” flow that follows MIL-PRF-38535 requirements for Class V processing.

Ambient

Temperature

Type

Package

Part Number

Packaging

Type

Connection Diagram

-55°C to

125°C

K

3-Terminal

Metal Can

SGR137AK

TO-3

SGR137AK-EV*

SGR137K

SGR137K-EV*

-55°C to

125°C

T

3-Terminal

Metal Can

SGR137AT

TO-39

SGR137AT-EV*

SGR137T

SGR137T-EV*

-55°C to

125°C

IG

3-Pin Hermetic

To-257

SGR137AIG

TO-257

(Isolated)

SGR137AIG-EV*

SGR137IG

SGR137IG-EV*

ADJ

CASE IS V

IN

V

OUT

1

2

ADJ

1

2

3

V

OUT

V

IN

CASE IS V

IN

ADJ

V

OUT

V

IN

Connection Diagrams and Ordering Information

3

Connection Diagrams and Ordering Information

* EV is Microsemi’s “Equivalent V” flow that follows MIL-PRF-38535 requirements for Class V processing.

Ambient

Temperature

Type

Package

Part Number

Packaging

Type

Connection Diagram

-55°C to

125°C

L

20-Pin

CERAMIC

SGR137AL

Ceramic

(LCC)

Leadless

Chip Carrier

L PACKAGE

(Top View)

1. V

OUT

*

2. V

OUT

*

3. N.C.

4. N.C.

5.

6. N.C.

7.

8.

9. N.C.

10. N.C.

11. V

IN

12.

13. N.C.

14. N.C.

15. N.C

16. ADJ

17. N.C

18. N.C

19.

N.C

20.

N.C

N.C.

4

5

6

7

8

18

17

16

15

14

9

10 11 12

13

3

2 1 20

19

PbSn Lead Finish

N.C.

* Both V

OUT

pins must be externally

connected together at the device terminals.

SGR137AL-EV*

SGR137L

SGR137L-EV*

Notes:

All parts are viewed from the top.

FAN2519S285X

FAN2519S285X

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