Linear Technology LTC1624, Руководство пользователя

Страница: 3 / 28

3
LTC1624
TYPICAL PERFOR M A N CE CHARACTERISTICS
U W
Efficiency vs Load Current
V
OUT
= 3.3V
LOAD CURRENT (A)
EFFICIENCY (%)
100
95
90
85
80
75
70
0.001 0.1 1 10
1624 G08
0.01
V
OUT
= 5V
V
IN
= 10V
R
SENSE
= 0.033
Ω
LOAD CURRENT (A)
EFFICIENCY (%)
100
95
90
85
80
75
70
0.001 0.1 1 10
1624 G07
0.01
V
OUT
= 3.3V
R
SENSE
= 0.033
Ω
V
IN
= 5V
V
IN
= 10V
Efficiency vs Input Voltage
V
OUT
= 3.3V
INPUT VOLTAGE (V)
0
EFFICIENCY (%)
100
95
90
85
80
75
70
15 25
1624 G09
5 10
20 30
I
LOAD
= 1A
V
OUT
= 3.3V
R
SENSE
= 0.033
Ω
I
LOAD
= 0.1A
Efficiency vs Load Current
V
OUT
= 5V
Efficiency vs Input Voltage
V
OUT
= 5V
Input Supply Current vs
Input Voltage
Boost Line Regulation
INPUT VOLTAGE (V)
0
BOOST VOLTAGE (V)
6
5
4
3
2
1
0
15 25
1624 G04
5 10 20 30 35
I
BOOST
= 1mA
V
SW
= 0V
BOOST LOAD CURRENT (mA)
0
BOOST VOLTAGE (V)
6
5
4
3
2
1
0
15 25
1624 G06
5 10
20 30
V
SW
= 0V
V
IN
= 15V
V
IN
= 5V
Boost Load Regulation
TEMPERATURE (
°
C)
–40
BOOST VOLTAGE (V)
6.0
5.5
5.0
4.5
4.0
35 85
1624 G15
–15 10
60 110 135
I
LOAD
= 1mA
LOAD CURRENT (A)
V
IN
– V
OUT
(V)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1624 G11
0
0.5
1.0 1.5 2.0 2.5 3.0
R
SENSE
= 0.033
Ω
V
OUT
DROP OF 5%
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (
µ
A)
700
600
500
400
300
200
100
0
15 25
1624 G05
5 10
20 30 35
SLEEP MODE
V
FB
= 1.21V
SHUTDOWN
INPUT VOLTAGE (V)
0
EFFICIENCY (%)
100
95
90
85
80
75
70
15 25
1624 G10
5 10
20 30
I
LOAD
= 1A
V
OUT
= 5V
R
SENSE
= 0.033
Ω
I
LOAD
= 0.1A
V
IN
– V
OUT
Dropout Voltage
vs Load Current
Boost Voltage vs Temperature