ST7808 View Datasheet(PDF) - Semtech Electronics LTD.
Part Name
Description
Manufacturer
ST7808 Datasheet PDF : 3 Pages
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ST 7808
3-terminal 1 A positive voltage regulator
Features
• Output Current up to 1 A
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection
Absolute Maximum Ratings (Ta = 25 OC)
Parameter
Input Voltage
Thermal Resistance Junction-Cases
Thermal Resistance Junction-Air
Operating Temperature Range
Storage Temperature Range
TO-220 Plastic Package
Symbol
VI
RθJC
RθJA
TOPR
TS
Value
35
5
65
0 to +125
-65 to +150
Units
V
OC/W
OC/W
OC
OC
Electrical Characteristics
(0 OC < TJ < 125 OC, IO = 500 mA, VI = 14 V, CI = 0.33 µF, CO = 0.1 µF, unless otherwise specified)
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
Output Voltage
Line Regulation 1)
Load Regulation 1)
TJ = + 25 OC
7.7 8 8.3
VO 5 mA ≤ IO ≤ 1 A, PO ≤ 15 W
VI = 10.5 V to 23 V
V
7.6 8 8.4
Regline TJ = + 25 OC VI = 10.5 V to 25 V
VI = 11.5 V to 17 V
-
- 160
mV
-
-
80
Regload TJ = + 25 OC IO = 5 mA to 1.5 A
-
- 160
mV
IO = 250 mA to 750 mA
-
-
80
Quiescent Current
IQ
TJ = + 25 OC
-
-
8
mA
Quiescent Current Change
ΔIQ
IO = 5 mA to 1 A
VI = 10.5 V to 25 V
-
- 0.5
mA
-
-
1
Output Voltage Drift
ΔVO/ΔT IO = 5 mA
- -0.8 - mV/OC
Output Noise Voltage
VN f = 10 Hz to 100 KHz, TA = + 25 OC
- 52 -
µV
Ripple Rejection
RR f = 120 Hz, VI = 11.5 V to 21.5 V
56 -
-
dB
Dropout Voltage
VDrop IO = 1 A, TJ = + 25 OC
-
2
-
V
Output Resistance
RO f = 1 KHz
-
17
-
mΩ
Short Circuit Current
ISC VI = 35 V, TA = + 25 OC
- 230 -
mA
Peak Current
IPK
TJ = + 25 OC
- 2.2 -
A
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 is used.
SEMTECH ELECTRONICS LTD.
(Subsidiary of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 21/06/2006
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