LT1020 Datasheet, PDF (10/16 Pages) Linear Technology – Micropower Regulator and Comparator

LT1020
TYPICAL APPLICATI S
1 Amp Low Dropout Regulator
V_IN
2.2k
3
V_IN
2
V_OUT
LT1020
11
GND
C_L ^FB
9
10
0.01µF
MJE2955
*
10k* 100k
0.001µF
V_OUT
5V
220µF^†
150Ω* 100k
* FOR CURRENT LIMIT ≈ 1.5A
† _{MUST HAVE LOW ESR.}
SEVERAL 100µF CAPACITORS
CAN BE PARALLELED.
SEE LT1129 DATA SHEET FOR 700mA OUTPUT
1020 TA06
Dual Output Regulator
9
GND
8
–INPUT
V_IN > 5.2V
3
V_IN
2
V_OUT
5 _COMP
PNP
+INPUT
7
LT1020
REF
OUT
4
COMP _FB ¹¹
NPN
6
500k
500k
0.001µF
1M
500k
100k
10µF
0.001µF
2N3904
51k
–V_IN
5V
10µF
–5V REG
10mA
1020 TA09
Maintaining Lowest I_Q at Dropout
3
V_IN
2
V_OUT
LT1020
GND
DROP-
OUT
FB
11
0.001µF _1M
9
13
1M
2N3904*
5V
10µF
1M
NC
* TRANSISTOR USED BECAUSE OF
LOW LEAKAGE CHARACTERISTICS
1020 TA11
Dual Output 150mA Regulator
9
GND
8
–INPUT
V_IN > 5.2V
3
V_IN
V_OUT ²
5 _COMP
PNP
+INPUT
7
LT1020
REF
OUT
4
COMP _FB ¹¹
NPN
6
500k
500k
0.001µF
200k
100k
100k
10µF
0.001µF
2N3904
51k*
4.7k
0.0047µF 51k*
2N3904
* FOR TEMPERATURES GREATER THAN
70°C, REDUCE 51k RESISTORS TO 15k.
I_Q WILL INCREASE.
–V_IN
5V
10µF
–5V REG
150mA
1020 TA10
12V_OUT
Dual Output Positive Regulator
51k
2N2907
6
0.01µF 190k
10µF
50k
3 ^{VIN ≥ 12.3V}
V_IN
2
V_OUT
LT1020
11
FB
+IN –IN
78
REF GND
49
5
0.001µF 1M
1M
5V
10µF
1020 TA12
10