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SG78xxA/78xx

TM

®

Positive Fixed Voltage Regulator

P

RODUCT

D

ATASHEET

DESCRIPTION

The SG78xxA/SG78xx series of

positive regulators offer self contained,

fixed-voltage capability with up to 1.5A of

load current and input voltage up to 50V

(SG78xxA series only). These units

feature a unique on-chip trimming system

to set the output voltages to within ±1.5%

of nominal on the SG78xxA series, ±2.0%

on the SG78xx series. The SG78xxA

versions also offer much improved line

and load regulation characteristics.

Utilizing an improved bandgap reference

design, problems have been eliminated

that are normally associated with the Zener

diode references, such as drift in output

voltage and large changes in the line and

load regulation.

All protective features of thermal

shutdown, current limiting, and safe-area

control have been designed into these units

and since these regulators require only a

small output capacitor for satisfactory

performance, ease of application is assured.

Although designed as fixed-voltage

regulators, the output voltage can be

increased through the use of a simple

voltage divider. The low quiescent drain

current of the device insures good regulation

when this method is used. Product is

available in hermetically sealed TO-257

(both case grounded ‘G’ and isolated ‘IG’),

TO-3, TO-39 and LCC packages.

KEY FEATURES

Output Voltage Set Internally to

±1.5% on SG78xxA

Input Voltage Range to 50V max.

on SG78xxA

Two Volt Input-Output Differential

Excellent Line and Load Regulation

Foldback Current Limiting

Thermal Overload Protection

Voltages Available: 5V, 12V, 15V

Contact Factory for Other Voltage

Options

Available in Surface Mount

Package

HIGH RELIABILITY FEATURES

- SG78xxA/78xx

Available to MIL-STD – 883, ¶ 1.2.1

MIL-M38510/10702BXA - JAN7805T

MIL-M38510/10703BXA - JAN7812T

MIL-M38510/10704BXA - JAN7815T

MIL-M38510/10706BYA - JAN7805K

MIL-M38510/10707BYA - JAN7812K

MIL-M38510/10708BYA - JAN7815K

Radiation Data Available

MSC-AMSG level "S" Processing Available

Available to DSCC

– Standard Microcircuit Drawing (SMD)

WWW .

Microsemi

.C

OM

IMPORTANT:

For the most current data, consult

MICROSEMI’s

website:

http://www.microsemi.com

PRODUCT HIGHLIGHT

SCHEMATIC DIAGRAM

*

SG78

XX

SG78

XX

* For normal operation the (V ) sense pin must be externally connected to the load.

OS

Copyright

©

1997

Rev. 1.5, 2010-07-13

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 1

SG78xxA/78xx

TM

®

Positive Fixed Voltage Regulator

P

RODUCT

D

ATASHEET

ABSOLUTE MAXIMUM RATINGS

WWW .

Microsemi

.C

OM

Device Output Voltage

5V

12V

15V

Input Voltage

35V

Input Voltage

(Transient)(Note 3)

50V

Input Voltage Differential

(Output Shorted to Ground)

35V

Operating Junction Temperature .........................................................................................................................................................150°C

Storage Temperature Range ................................................................................................................................................. -65°C to 150°C

Lead Temperature (Soldering 10 seconds) ..........................................................................................................................................300°C

Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of

specified terminal

.

Note 3: Operation at high input voltages is dependent upon load current. When load current is less than 5mA, output will rise out of regulation as input-

output differential increases beyond 30V. Note also from figure 1, that maximum load current is reduced at high voltages. The 50V input rating of the

SG78xxA series refers to ability to withstand high line or transient conditions without damage. Since the regulator’s maximum current capability is

reduced, the output may fall out of regulation at high input voltages under nominal loading.

THERMAL DATA

K

TO-3 3-Terminal Metal Can (Two pins and case)

3.0°C/W

35°C/W

THERMAL RESISTANCE

-

JUNCTION TO

C

ASE

,

θ

JC

THERMAL RESISTANCE

-

JUNCTION TO

A

MBIENT

,

θ

JA

T

TO-39 3-Pin Metal Can

15°C/W

120°C/W

THERMAL RESISTANCE

-

JUNCTION TO

C

ASE

,

θ

JC

THERMAL RESISTANCE

-

JUNCTION TO

A

MBIENT

,

θ

JA

G

TO-257 3-Pin Hermetic

3.5°C/W

42°C/W

THERMAL RESISTANCE

-

JUNCTION TO

C

ASE

,

θ

JC

THERMAL RESISTANCE

-

JUNCTION TO

A

MBIENT

,

θ

JA

IG

TO-257 3-Pin Hermetic (Isolated)

4.0°C/W

42°C/W

THERMAL RESISTANCE

-

JUNCTION TO

C

ASE

,

θ

JC

THERMAL RESISTANCE

-

JUNCTION TO

A

MBIENT

,

θ

JA

L

Leadless Chip Carrier 20-Pin Ceramic

35°C/W

120°C/W

P

ACKAGE

D

ATA

P

ACKAGE

D

ATA

THERMAL RESISTANCE

-

JUNCTION TO

C

ASE

,

θ

JC

THERMAL RESISTANCE

-

JUNCTION TO

A

MBIENT

,

θ

JA

Junction Temperature Calculation: T

J

= T

A

+ (P

D

x

θ

JA

).

The

θ

JA

numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.

Copyright

©

1997

Rev. 1.5, 2010-07-13

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 2

SG78xxA/78xx

TM

®

Positive Fixed Voltage Regulator

P

RODUCT

D

ATASHEET

CHARACTERISTIC CURVES

WWW .

Microsemi

.C

OM

Figure 1 –

Peak Output Current vs.

Input – Output Differential

Figure 2 –

Minimum Input – Output Voltage vs.

Load Current

Figure 3 –

Ripple Rejection vs. Frequency

Figure 4 –

Temperature Coefficient of Output Voltage

G

RAPHS

G

RAPHS

Copyright

©

1997

Rev. 1.5, 2010-07-13

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 3

SG78xxA/78xx

TM

®

Positive Fixed Voltage Regulator

P

RODUCT

D

ATASHEET

APPLICATIONS

WWW .

Microsemi

.C

OM

Figure 5 –

Fixed Output Regulator

Figure 6 –

Circuit for Increasing Output Voltage

Figure 7 –

High Output Current, Short Circuit Protected

Figure 8 –

Adjustable Output Regulator, 7V to 30V

RECOMMENDED OPERATING CONDITIONS

Parameter

Operating Junction Temperature Range (Note 2)

Note 2: Range over which the device is functional.

SG78xx / 78xxA

Min

Typ

Max

55

150

Units

°C

A

PPLICATIONS

A

PPLICATIONS

Copyright

©

1997

Rev. 1.5, 2010-07-13

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 4

SG78xxA/78xx

TM

®

Positive Fixed Voltage Regulator

P

RODUCT

D

ATASHEET

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG7805A / SG7805 with -55°C < T

A

<

125°C, V

IN

= 10V, I

O

= 500mA for the K, G and IG – Power Packages, I

O

= 100mA for the T and L packages, C

IN

= 0.33µF, and C

OUT

=

0.1µF. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient

temperature.

Parameter

Output Voltage

Line Regulation (Note 1)

Load Regulation (Note 1)

Total Output Voltage

Tolerance

Quiescent Current

Quiescent Current Change

Dropout Voltage

Peak Output Current

Short Circuit Current

Ripple Rejection

Output Noise Voltage (rms)

Long Term Stability

Thermal Shutdown

Note

Test Conditions

T

J

= 25°C

V

IN

= 7.5V to 20V, T

J

= 25°C

V

IN

= 8V to 12V, T

J

= 25°C

Power Pkgs: I

O

= 5mA to 1.5A, T

J

= 25°C

I

O

= 250mA to 750mA, T

J

= 25°C

T – Pkg: I

O

= 5mA to 500mA, T

J

= 250°C

VIN = 8V to 20V

Power Pkgs: I

O

= 5mA to 1.0A, P < 20W

T – Pkg: I

O

=5mA to 500mA, P < 20W

Over Temperature Range

T

J

= 25°C

With Line: V

IN

= 8V to 25V

With Load: I

O

= 5mA to 1.0A (Power Pkgs.)

I

O

= 5mA to 500mA (T)

∆V

O

= 100mV, T

J

= 25°C

Power Pkgs: I

O

= 1.0A, T-Pkg: I

O

= 500mA

Power Pkgs: V

IN

= 10V, T

J

= 25°C

T – Pkg: V

IN

= 10V, T

J

= 25°C

Power Pkgs: V

IN

= 35V, T

J

= 25°C

T – Pkg: V

IN

= 35V, T

J

= 25°C

∆V

IN

= 10V, f = 120Hz, T

J

= 25°C

f = 10Hz to 100kHz (Note 2)

1000 hours @ T

J

= 125°C

I

O

= 5mA

SG7805A

Typ

Max

5.00

5.08

5

25

2

12

15

50

5

25

5

25

5.00

4

5.15

7

6

0.8

0.5

2.5

3.3

2.0

1.2

0.7

40

20

175

20

175

SG7805

Typ

5.00

5

2

15

5

20

5.00

4

Units

Max

5.20

25

50

25

5.35

7

6

0.8

0.5

2.5

3.3

2.0

1.2

0.7

40

V

mV

V

mA

V

A

dB

µV/V

mV

°C

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Microsemi

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OM

Min

4.92

Min

4.80

4.85

4.65

1.5

0.5

68

2

2.0

1.0

1.5

0.5

68

2

2.0

1.0

1: All regulation tests are made at constant junction temperature with low duty cycle testing.

2: This test is guaranteed but is not tested in production.

E

LECTRICALS

E

LECTRICALS

Copyright

©

1997

Rev. 1.5, 2010-07-13

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 5

SG7815AGDESC

SG7815AGDESC概述

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