ST L7800AB User Manual

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Feature summary

■ Output current in excess of 1A

■ Output voltages of 5; 6; 8; 9; 12; 15; 18; 20; 24V

■ Thermal overload protection

■ Output transition SOA protection

■ 2% Output voltage tolerance

■ Guaranteed in extended temperature range

L7800AB/AC series

Precision 1A regulators

TO-220

TO-220FP

Description

The L7800A series of three terminal positive
regulators is available in TO-220, TO-220FP, and

2

D

PAK packages and several fixed output
voltages, making it useful in a wide range of
applications. These regulators can provide local
on-card regulation, eliminating the distribution
problem associated with single point regulation.
Each type employs internal current limiting,
thermal shut-down and safe area protection,
making it essentially indestructible. If adequate
heat sinking is provided, they can

Schematic diagram

D2PAK

deliver over 1A output current, Although designed
primarily as fixed voltage regulators, these
devices can be used with external components to
obtain adjustable voltage and currents.

January 2007 Rev. 11 1/28

www.st.com

28

L7800AB/AC series

Contents

1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1 Design consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2/28

L7800AB/AC series Pin configuration

1 Pin configuration

Figure 1. Pin connections (top view)

TO-220

Figure 2. Schematic diagram

TO-220FP

D2PAK

3/28

Maximum ratings L7800AB/AC series

2 Maximum ratings

Table 1. Absolute maximum ratings

Symbol Parameter Value Unit

for V

= 5 to 18V 35

O

= 20, 24V 40

for V

O

for L7800AC 0 to 150

for L7800AB -40 to 125

V

°C

T

P

T

V

I

STG

OP

DC Input voltage

I

Output current Internally Limited mA

O

Power dissipation Internally Limited mW

D

Storage temperature range -65 to 150 °C

Operating junction temperature range

Note: Absolute Maximum Ratings are those values beyond which damage to the device may

occur. Functional operation under these condition is not implied

Table 2. Thermal Data

Symbol Parameter TO-220 TO-220FP D2PA K U ni t

R

R

thJC

thJA

Thermal resistance junction-case 3 5 3 °C/W

Thermal resistance junction-ambient 50 60 62.5 °C/W

Figure 3. Application circuits

4/28

L7800AB/AC series Test circuits

3 Test circuits

Figure 4. DC Parameter

Figure 5. Load regulation

Figure 6. Ripple rejection

5/28

Electrical characteristics L7800AB/AC series

4 Electrical characteristics

Table 3. Electrical characteristics of L7805A (VI = 10V, IO=1A, TJ = 0 to 150°C (L7805AC),

T

= -40 to 125°C (L7805AB), unless otherwise specified)

J

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

V

∆V

Output voltage TJ = 25°C 4.9 5 5.1 V

O

O

(1)

O

Output voltage

Line regulation

IO = 5mA to 1A, PO ≤15W
V

= 7.5 to 20V

I

V

= 7.5 to 25V, IO = 500 mA 7 50 mV

I

V

= 8 to 12V 10 50 mV

I

4.855.2V

VI = 8 to 12V, TJ = 25°C 2 25 mV

V

= 7.3 to 20V, TJ = 25°C 7 50 mV

I

IO = 5mA to 1A 25 100 mV

∆V

(*) Load regulation

O

I

Quiescent current

q

∆I

Quiescent current change

q

IO = 5mA to 1.5A, TJ = 25°C 30 100 V

I

= 250 to 750mA 8 50 V

O

T

= 25°C 4.3 6 mA

J

6mA

= 8 to 25V, IO = 500 mA 0.8 mA

V

I

V

= 7.5 to 20V, TJ = 25°C 0.8 mA

I

IO = 5mA to 1A 0.5 mA

SVR Supply voltage rejection V

V

Dropout voltage IO = 1A, TJ = 25°C 2 V

d

= 8 to 18V, f = 120Hz, IO = 500mA 68 dB

I

eN Output noise voltage TA = 25°C, B =10Hz to 100KHz 10 µV/V

R

I

I

∆V

1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Output resistance f =1KHz 17 mΩ

O

Short circuit current VI = 35V, TA = 25°C 0.2 A

sc

Short circuit peak current TJ = 25°C 2.2 A

scp

/∆T Output voltage drift -1.1 mV/°C

O

O

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L7800AB/AC series Electrical characteristics

Table 4. Electrical characteristics of L7806A (VI = 11V, IO=1A, TJ = 0 to 150°C (L7806AC),

T

= -40 to 125°C (L7806AB), unless otherwise specified)

J

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

V

∆V

Output voltage TJ = 25°C 5.88 6 6.12 V

O

O

(1)

O

Output voltage

Line regulation

IO = 5mA to 1A, PO ≤15W
V

= 8.6 to 21V

I

V

= 8.6 to 25V, IO = 500 mA 9 60 mV

I

V

= 9 to 13V 11 60 mV

I

5.7666.24V

VI = 9 to 13V, TJ = 25°C 3 30 mV

V

= 8.3 to 21V, TJ = 25°C 9 60 mV

I

IO = 5mA to 1A 25 100 mV

(1)

∆V

∆I

Load regulation

O

I

Quiescent current

q

Quiescent current change

q

IO = 5mA to 1.5A, TJ = 25°C 30 100 V

I

= 250 to 750mA 10 50 V

O

T

= 25°C 4.3 6 mA

J

6mA

= 9 to 25V, IO = 500 mA 0.8 mA

V

I

V

= 8.6 to 21V, TJ = 25°C 0.8 mA

I

IO = 5mA to 1A 0.5 mA

SVR Supply voltage rejection V

V

Dropout voltage IO = 1A, TJ = 25°C 2 V

d

= 9 to 19V, f = 120Hz, IO = 500mA 65 dB

I

eN Output noise voltage TA = 25°C, B =10Hz to 100KHz 10 µV/V

R

I

I

∆V

1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Output resistance f =1KHz 17 mΩ

O

Short circuit current VI = 35V, TA = 25°C 0.2 A

sc

Short circuit peak current TJ = 25°C 2.2 A

scp

/∆T Output voltage drift -0.8 mV/°C

O

O

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Electrical characteristics L7800AB/AC series

Table 5. Electrical characteristics of L7808A (VI = 14V, IO=1A, TJ = 0 to 150°C (L7808AC),

T

= -40 to 125°C (L7808AB), unless otherwise specified)

J

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

V

∆V

Output voltage TJ = 25°C 7.84 8 8.16 V

O

O

(1)

O

Output voltage

Line regulation

IO = 5mA to 1A, PO ≤15W
V

= 10.6 to 23V

I

V

= 10.6 to 25V, IO = 500 mA 12 80 mV

I

V

= 11 to 17V 15 80 mV

I

7.788.3V

VI = 11 to 17V, TJ = 25°C 5 40 mV

V

= 10.4 to 23V, TJ = 25°C 12 80 mV

I

IO = 5mA to 1A 25 100 mV

(1)

∆V

∆I

Load regulation

O

I

Quiescent current

q

Quiescent current change

q

IO = 5mA to 1.5A, TJ = 25°C 30 100 V

I

= 250 to 750mA 10 50 V

O

T

= 25°C 4.3 6 mA

J

6mA

= 11 to 25V, IO = 500 mA 0.8 mA

V

I

V

= 10.6 to 23V, TJ = 25°C 0.8 mA

I

IO = 5mA to 1A 0.5 mA

= 11.5 to 21.5V, f = 120Hz,

V

SVR Supply voltage rejection

V

Dropout voltage IO = 1A, TJ = 25°C 2 V

d

eN Output noise voltage T

R

I

I

∆V

1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Output resistance f =1KHz 18 mΩ

O

Short circuit current VI = 35V, TA = 25°C 0.2 A

sc

Short circuit peak current TJ = 25°C 2.2 A

scp

/∆T Output voltage drift -0.8 mV/°C

O

I

= 500mA

I

O

= 25°C, B =10Hz to 100KHz 10 µV/V

A

62 dB

O

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L7800AB/AC series Electrical characteristics

Table 6. Electrical characteristics of L7809A (VI = 15V, IO=1A, TJ = 0 to 150°C (L7809AC),

T

= -40 to 125°C (L7809AB), unless otherwise specified)

J

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

V

∆V

Output voltage TJ = 25°C 8.82 9 9.18 V

O

O

(1)

O

Output voltage

Line regulation

IO = 5mA to 1A, PO ≤15W
V

= 10.6 to 23V

I

V

= 10.6 to 25V, IO = 500 mA 12 90 mV

I

V

= 11 to 17V 15 90 mV

I

8.6599.35V

VI = 11 to 17V, TJ = 25°C 5 45 mV

V

= 10.4 to 23V, TJ = 25°C 12 90 mV

I

IO = 5mA to 1A 25 100 mV

(1)

∆V

∆I

Load regulation

O

I

Quiescent current

q

Quiescent current change

q

IO = 5mA to 1.5A, TJ = 25°C 30 100 V

I

= 250 to 750mA 10 50 V

O

T

= 25°C 4.3 6 mA

J

6mA

= 11 to 25V, IO = 500 mA 0.8 mA

V

I

V

= 10.6 to 23V, TJ = 25°C 0.8 mA

I

IO = 5mA to 1A 0.5 mA

= 11.5 to 21.5V, f = 120Hz,

V

SVR Supply voltage rejection

V

Dropout voltage IO = 1A, TJ = 25°C 2 V

d

eN Output noise voltage T

R

I

I

∆V

1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be

taken into account separately. Pulse testing with low duty cycle is used.

Output resistance f =1KHz 18 mΩ

O

Short circuit current VI = 35V, TA = 25°C 0.2 A

sc

Short circuit peak current TJ = 25°C 2.2 A

scp

/∆T Output voltage drift -0.8 mV/°C

O

I

= 500mA

I

O

= 25°C, B =10Hz to 100KHz 10 µV/V

A

61 dB

O

9/28