Datasheet

8
LT1120
1120fc
TYPICAL APPLICATIO S
U
Regulator with Output Voltage Monitor
+
V
IN
V
OUT
FB
GNDREF
LT1120
4
0.001µF 98k
500k
5V
LOGIC
LOGIC
OUTPUT
100k
2k
10µF
V
OUT
V
OUT
5V
1120 TA03
2
–INPUT 8
16
5
7
+
–
LOGIC OUTPUT GOES LOW WHEN V
OUT
DROPS BY 100mV
PIN 7
LOGIC
OUTPUT
Compensating the Comparator as an Op Amp
1A Low Dropout Regulator
+
V
OUT
FB
GND
LT1120
4
0.001µF100k
MJE2955
10k*
2.2k
V
IN
*
100k150Ω*
220µF
†
V
OUT
5V
1120 TA05
2
1
V
IN
5
* FOR CURRENT LIMIT ≈ 1.5A
†
MUST HAVE LOW ESR. SEVERAL 100µF CAPACITORS CAN BE PARALLELED.
C1
50
µA
AT Av = 100,
SLEW RATE = +0.05V/µs
–6V/µs
–
+
R2
6
8
7
R1
1M
C2
1120 TA04
Av R1 C1 C2 R2
133Ω 0.1µF 0.001µF—
10 100Ω 0.047µF — 100k
100 10k 0.002µF — 10k