ST MICROELECTRONICS uA 78S075 Datasheet
Feature summary
■ Output current to 2A
■ Output voltages of 5; 7.5; 9; 10; 12; 15; 18; 24V
■ Thermal overload protection
■ Short circuit protection
■ Output transition SOA protection
Description
The L78S00 series of three-terminal positive
regulators is available in TO-220 and TO-3
packages and with several fixed output voltages,
making it useful in a wide range of applications.
These regulators can provide local on-card
regulation, eliminating the distribution problems
associated with single point regulation. Each type
employs internal current limiting, thermal shutdown and safe area protection, making it
essentially indestructible. If adequate heat sinking
is provided, they can deliver over 2A output
L78S00 series
2A Positive voltage regulators
TO-220
TO-3
current. Although designed primarily as fixed
voltage regulators, these devices can be used
with external components to obtain adjustable
voltages and currents.
Schematic diagram
September 2006 Rev. 2 1/35
www.st.com
35
L78S00 series
Contents
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
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L78S00 series Pin configuration
1 Pin configuration
Figure 1. Pin connections (top view)
TO-220
Figure 2. Schematic diagram
TO-3
3/35
Maximum ratings L78S00 series
2 Maximum ratings
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
for V
= 5 to 18V 35
O
= 24V 40
for V
O
for L78S00 -55 to 150
for L78S00C 0 to 150
V
°C
T
P
T
V
I
STG
OP
DC Input voltage
I
Output current Internally Limited
O
Power dissipation Internally Limited
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-3 Unit
R
thJC
R
thJA
Thermal resistance junction-case 5 4 °C/W
Thermal resistance junction-ambient 50 35 °C/W
Figure 3. Application circuits
4/35
L78S00 series Test circuits
3 Test circuits
Figure 4. DC Parameter
Figure 5. Load regulation
Figure 6. Ripple rejection
5/35
Electrical characteristics L78S00 series
4 Electrical characteristics
Table 3. Electrical characteristics of L78S05 (refer to the test circuits, TJ = 25°C, VI = 10V, IO = 500
mA, unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
∆V
∆V
∆I
Output voltage 4.8 5 5.2 V
O
Output voltage IO = 1A, VI = 7V 4.75 5 5.25 V
O
V
= 7 to 25V 100
Line regulation
O
Load regulation IO = 20 mA to 2A 100 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 8 to 25V 50
V
I
I
= 20mA to 1A 0.5
O
= 7 to 25 V, IO = 20mA 1.3
V
I
mV
mA
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1.1 mV/°C
eN Output noise voltage B =10Hz to 100KHz 40 µV
SVR Supply voltage rejection f = 120Hz 60 dB
V
R
I
Dropout voltage IO ≤ 1A 8 V
d
Output resistance f = 1 KHz 17 mΩ
O
I
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
6/35
L78S00 series Electrical characteristics
Table 4. Electrical characteristics of L78S75 (refer to the test circuits, TJ = 25°C, VI = 12.5V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
∆V
∆V
∆I
Output voltage 7.15 7.5 7.9 V
O
Output voltage IO = 1A, VI = 9.5V 7.1 7.5 7.95 V
O
V
= 9.5 to 25V 120
Line regulation
O
Load regulation IO = 20 mA to 2A 120 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 10.5 to 20V 60
V
I
I
= 20mA to 1A 0.5
O
= 20mA, VI = 9.5 to 25V 1.3
I
O
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -0.8 mV/°C
eN Output noise voltage B =10Hz to 100KHz 52 µV
SVR Supply voltage rejection f = 120Hz 54 dB
V
R
I
I
Dropout voltage IO ≤ 1.5A 10.5 V
d
Output resistance f = 1 KHz 16 mΩ
O
Short circuit current VI =27V 500 mA
sc
Short circuit peak current 3 A
scp
Table 5. Electrical characteristics of L78S09 (refer to the test circuits, TJ = 25°C, VI = 14V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
mV
mA
V
V
∆V
∆V
∆I
Output voltage 8.65 9 9.35 V
O
Output voltage IO = 1A, VI = 11V 8.6 9 9.4 V
O
V
= 11 to 25V 130
Line regulation
O
Load regulation IO = 20 mA to 2A 130 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 11 to 20V 65
V
I
I
= 20mA to 1A 0.5
O
= 11 to 25 V, IO = 20mA 1.3
V
I
mV
mA
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C
eN Output noise voltage B =10Hz to 100KHz 60 µV
SVR Supply voltage rejection f = 120Hz 53 dB
V
R
I
I
Dropout voltage IO ≤ 1.5A 12 V
d
Output resistance f = 1 KHz 17 mΩ
O
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
7/35
Electrical characteristics L78S00 series
Table 6. Electrical characteristics of L78S10 (refer to the test circuits, TJ = 25°C, VI = 15V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
∆V
∆V
∆I
Output voltage 9.5 10 10.5 V
O
Output voltage IO = 1A, VI = 12.5V 9.4 10 10.6 V
O
V
= 12.5 to 30V 200
Line regulation
O
Load regulation IO = 20 mA to 2A 150 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 14 to 22V 100
V
I
I
= 20mA to 1A 0.5
O
= 12.5 to 30 V, IO = 20mA 1
V
I
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C
eN Output noise voltage B =10Hz to 100KHz 65 µV
SVR Supply voltage rejection f = 120Hz 53 dB
V
R
I
I
Dropout voltage IO ≤ 1.5A 13 V
d
Output resistance f = 1 KHz 17 mΩ
O
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
Table 7. Electrical characteristics of L78S12 (refer to the test circuits, TJ = 25°C, VI = 19V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
mV
mA
V
V
∆V
∆V
∆I
Output voltage 11.5 12 12.5 V
O
Output voltage IO = 1A, VI = 14.5V 11.41212.6 V
O
V
= 14.5 to 30V 240
Line regulation
O
Load regulation IO = 20 mA to 2A 160 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 16 to 22V 120
V
I
I
= 20mA to 1A 0.5
O
= 14.5 to 30 V, IO = 20mA 1
V
I
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C
eN Output noise voltage B =10Hz to 100KHz 75 µV
SVR Supply voltage rejection f = 120Hz 53 dB
V
R
I
I
Dropout voltage IO ≤ 1.5A 15 V
d
Output resistance f = 1 KHz 18 mΩ
O
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
8/35
mV
mA
L78S00 series Electrical characteristics
Table 8. Electrical characteristics of L78S15 (refer to the test circuits, TJ = 25°C, VI = 23V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
∆V
∆V
∆I
Output voltage 14.4 15 15.6 V
O
Output voltage IO = 1A, VI = 17.5V 14.25 15 15.75 V
O
V
= 17.5 to 30V 300
Line regulation
O
Load regulation IO = 20 mA to 2A 180 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 20 to 26V 150
V
I
I
= 20mA to 1A 0.5
O
= 17.5 to 30 V, IO = 20mA 1
V
I
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C
eN Output noise voltage B =10Hz to 100KHz 90 µV
SVR Supply voltage rejection f = 120Hz 52 dB
V
R
I
I
Dropout voltage IO ≤ 1.5A 18 V
d
Output resistance f = 1 KHz 19 mΩ
O
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
Table 9. Electrical characteristics of L78S18 (refer to the test circuits, TJ = 25°C, VI = 26V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
mV
mA
V
V
∆V
∆V
∆I
Output voltage 17.1 18 18.9 V
O
Output voltage IO = 1A, VI = 20.5V 17 18 19 V
O
V
= 20.5 to 30V 360
Line regulation
O
Load regulation IO = 20 mA to 2A 200 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 22 to 28V 180
V
I
I
= 20mA to 1A 0.5
O
= 20.5 to 30 V, IO = 20mA 1
V
I
mV
mA
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1 mV/°C
eN Output noise voltage B =10Hz to 100KHz 110 µV
SVR Supply voltage rejection f = 120Hz 49 dB
V
R
I
I
Dropout voltage IO ≤ 1.5A 21 V
d
Output resistance f = 1 KHz 22 mΩ
O
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
9/35
Electrical characteristics L78S00 series
Table 10. Electrical characteristics of L78S24 (refer to the test circuits, TJ = 25°C, VI = 33V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
∆V
∆V
∆I
Output voltage 23 24 25 V
O
Output voltage IO = 1A, VI = 27V 22.82425.2 V
O
V
= 27 to 38V 480
Line regulation
O
Load regulation IO = 20 mA to 2A 250 mV
O
I
Quiescent current 8 mA
d
Quiescent current change
d
I
= 30 to 36V 240
V
I
I
= 20mA to 1A 0.5
O
= 27 to 38 V, IO = 20mA 1
V
I
mV
mA
∆VO/∆T Output voltage drift IO = 5mA, TJ = -55°C to 150°C -1.5 mV/°C
eN Output noise voltage B =10Hz to 100KHz 170 µV
SVR Supply voltage rejection f = 120Hz 48 dB
V
R
I
I
Dropout voltage IO ≤ 1.5A 27 V
d
Output resistance f = 1 KHz 23 mΩ
O
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
10/35
L78S00 series Electrical characteristics
Table 11. Electrical characteristics of L78S05C (refer to the test circuits, TJ = 25°C, VI = 10V,
I
= 500 mA, unless otherwise specified)
O
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
∆V
∆V
∆I
∆V
Output voltage 4.8 5 5.2 V
O
Output voltage IO = 1A, VI = 7V 4.75 5 5.25 V
O
V
= 7 to 25V 100
Line regulation
O
Load regulation
O
I
Quiescent current 8 mA
d
Quiescent current change
d
/∆T Output voltage drift IO = 5mA, TJ = 0°C to 70°C -1.1 mV/°C
O
I
= 8 to 25V 50
V
I
= 20 mA to 1.5A 100
I
O
IO = 2A 80
= 20mA to 1A 0.5
I
O
VI = 7 to 25 V, IO = 20mA 1.3
eN Output noise voltage B =10Hz to 100KHz 40 µV
SVR Supply voltage rejection f = 120Hz 54 dB
V
R
I
I
Dropout voltage IO ≤ 1A 8 V
d
Output resistance f = 1 KHz 17 mΩ
O
Short circuit current VI = 27V 500 mA
sc
Short circuit peak current 3 A
scp
mV
mV
mA
11/35
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