3-terminal 1 A positive voltage regulator
Description
ST 7812R
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 Symbol VI RθJC RθJA TOPR TS Value 35 5 65 0 to + 125 - 65 to + 150
O O
Units V C/W C/W
O
C C
O
Electrical Characteristics
(0 OC < TJ < 125 OC, IO = 500 mA, VI = 19 V, CI = 0.
33 µF, CO = 0.
1 µF, unless otherwise specified)
Parameter Output Voltage
Symbol TJ = + 25 OC VO
Conditions 5 mA ≤ IO ≤ 1 A, PO ≤ 15 W
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Min.
11.
5 11.
4 55 -
Typ.
12 12 -1 76 2 18 230 2.
2
Max.
12.
5 12.
6 240 120 240 120 8 0.
5 1 -
Unit V
VI = 14.
5 V to 27 V Line Regulation
1)
Regline Regload IQ ΔIQ ΔVO/ΔT VN RR VDrop RO ISC IPK
TJ = + 25 OC TJ = + 25 OC TJ = + 25 OC
VI = 14.
5 V to 30 V VI = 16 V to 22 V IO = 5 mA to 1.
5 A IO = 250 mA to 750 mA
mV mV mA mA mV/OC µV dB V mΩ mA A
Load Regulation
1)
Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
1)
IO = 5 mA to 1 A VI = 14.
5 V to 30 V IO = 5 mA f = 10 Hz to 100 KHz, TA = + 25 OC f = 120 Hz, VI = 15 V to 25 V IO = 1 A, TJ = + 25 C
O
f = 1 KHz VI = 35 V, TA = + 25 C
O
TJ = + 25 OC
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
Datasheet pdf - http://www.
DataSheet4U.
co.
kr/
ST 7812R
Typical Performance Characteristics
www.
DataSheet.
net/
SEMTECH ELECTRONICS LTD.
®
(Subsidiary of Sino-Tech International Holdings Limite...
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