ST 7812
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) Input Voltage Thermal Resistance Junction-Cases Thermal Resistance Junction-Air Operating Temperature Range Storage Temperature Range
TO-220 Plastic PackageParameter Symbol Value Units VI 35 V O
RθJC 5 C/W ORθJA 65 C/W
TOPR TS
0 to + 125 - 65 to + 150
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 Symbol
Output Voltage
VO
Conditions
Min. Typ. Max.
Unit V
TJ = + 25 OC 11.5 12 12.55 mA ≤ IO ≤ 1 A, PO ≤ 15 W VI = 14.5 V to 27 V
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
11.4 12 12.6- - - - - - - 55 -
- - - - - - -1 - 18
2401202401200.5 1 - - -
Line Regulation Regline TJ = + 25 OCLoad Regulation Regload TJ = + 25 OCQuiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Output Resistance Short Circuit Current Peak Current
1)
1)
mV mV
1)
IQ ΔIQ
TJ = + 25 OC - - 8 mA IO = 5 mA to 1 A VI = 14.5 V to 30 V
mA mV/OCdB mΩ
ΔVO/ΔT IO = 5 mA VN RR VDrop RO ISC IPK
f = 120 Hz, VI = 15 V to 25 V f = 1 KHz TJ = + 25 OC
f = 10 Hz to 100 KHz, TA = + 25 OC - 76 - µV IO = 1 A, TJ = + 25 OC - 2 - V VI = 35 V, TA = + 25 OC - 230 - mA - 2.2 - A 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
元器件交易网www.cecb2b.com
ST 7812
Typical Performance Characteristics
® 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
元器件交易网www.cecb2b.com
ST 7812
TO-220 PACKAGE OUTLINE
Dated : 21/06/2006® SEMTECH ELECTRONICS LTD.
(Subsidiary of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
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