BLOCK DIAGRAM
LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
SHDN
9
SHUTDOWN
200mV
BIAS CURRENT
AND
REFERENCE
GENERATOR
213mV
NOTE:
FOR LT3022 ADJ PIN (5) IS
CONNECTED TO THE ADJ PIN,
R1 AND R2 ARE EXTERNAL.
FOR LT3022-1.X PIN (5) IS
CONNECTED TO THE SENSE PIN,
R1 AND R2 ARE INTERNAL.
TIE PGND, AGND AND THE EXPOSED
PAD TOGETHER.
IDEAL
DIODE
THERMAL
SHUTDOWN
–
ERROR
+ AMP
–
NO-LOAD
R+ECOVERY
CURRENT
GAIN
R3
D1
Q1
PGND
10, 11
D2
Q2
25k
FIXED
VOUT
1.2V
1.5V
1.8V
R1 R2
3.92k 19.6k
3.92k 25.5k
3.92k 31.4k
IN
12, 13, 14
Q3
OUT
3, 4
SENSE
5
R2
R1
3022 BD
ADJ
5
AGND
6, 7
3022fb
11