ltc3824 Linear Technology Corporation, ltc3824 Datasheet - Page 4

• Manufacturer Part Number: ltc3824
• Description: High Voltage Step-down Controller With 40?a Quiescent Current
• Manufacturer: Linear Technology Corporation

LTC3824
TYPICAL PERFORMANCE CHARACTERISTICS
4
–0.2
–0.4
8.5
8.4
8.3
8.2
8.1
8.0
7.9
7.8
7.7
7.6
0.4
0.2
0
0
0
(V
V
REF
CC
-V
10
Change vs V
10
CAP
INDUCTOR
10mV/DIV
CURRENT
) vs I
20
1A/DIV
V
20
OUT
I
GATE
V
GATE
CC
30
Burst Mode Disabled at
I
LOAD
CC
(V)
(mA)
I
LOAD
at V
30
40
= 200mA
= 200mA, V
DRIVE
40
50
Low
3824 G04
4μs/DIV
3824 G01
60
50
OUT
= 5V
700
600
200
100
500
400
300
3
0
2
1
100
0
I
Switching Frequency vs R
CC
3824 G10
vs V
10
CC
200
20
R
V
SET
INDUCTOR
CC
50mV/DIV
CURRENT
30
(kΩ)
(V)
1A/DIV
V
V
FB
FB
V
OUT
= 0.75V
= 0.85V
300
40
Burst Mode Operation V
V
IN
SET
=12V, V
50
T
3824 G02
A
3824 G05
= 25°C unless otherwise noted.
OUT
400
60
?= 3V, I
20μs/DIV
LOAD
–1
–2
–3
–1
–2
3
2
1
0
2
1
0
= 200mA
–40
0
Switching Frequency Change
vs V
ΔV
OUT
REF
–20
CC
10
= 3V
vs Temperature
at R
3824 G08
DIE TEMPERATURE (°C)
0
20
SET
25
V
= 392kΩ
CC
30
(V)
50
40
75
50
100
3824 G03
3824 G06
3824fb
125
60