SEMTECH_ELEC ST7812R

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
Symbol
Value
VI
35
Thermal Resistance Junction-Cases
RθJC
5
O
Thermal Resistance Junction-Air
RθJA
65
O
Operating Temperature Range
TOPR
0 to + 125
O
TS
- 65 to + 150
O
Input Voltage
Storage Temperature Range
Units
V
C/W
C/W
C
C
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
Min.
Typ.
Max.
11.5
12
12.5
11.4
12
12.6
VI = 14.5 V to 30 V
-
-
240
VI = 16 V to 22 V
-
-
120
IO = 5 mA to 1.5 A
-
-
240
IO = 250 mA to 750 mA
-
-
120
Conditions
TJ = + 25 OC
Output Voltage
VO
5 mA ≤ IO ≤ 1 A, PO ≤ 15 W
VI = 14.5 V to 27 V
Line Regulation
1)
Load Regulation
1)
Quiescent Current
Quiescent Current Change
Output Voltage Drift
Unit
V
mV
Regline
TJ = + 25 OC
Regload
TJ = + 25 OC
IQ
TJ = + 25 OC
-
-
8
IO = 5 mA to 1 A
-
-
0.5
VI = 14.5 V to 30 V
-
-
1
IO = 5 mA
-
-1
-
mV/OC
-
76
-
µV
55
-
-
dB
IO = 1 A, TJ = + 25 C
-
2
-
V
-
18
-
mΩ
ΔIQ
ΔVO/ΔT
Output Noise Voltage
VN
f = 10 Hz to 100 KHz, TA = + 25 OC
Ripple Rejection
RR
f = 120 Hz, VI = 15 V to 25 V
Dropout Voltage
VDrop
O
mV
mA
mA
Output Resistance
RO
f = 1 KHz
Short Circuit Current
ISC
VI = 35 V, TA = + 25 C
-
230
-
mA
Peak Current
IPK
TJ = + 25 OC
-
2.2
-
A
1)
O
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
ST 7812R
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
ST 7812R
TO-252 PACKAGE OUTLINE
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