LTC3458 Linear Technology, LTC3458 Datasheet - Page 4
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LTC3458
Manufacturer Part Number
LTC3458
Description
1.4A/ 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
Manufacturer
Linear Technology
Datasheet
1.LTC3458.pdf
(16 pages)
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LTC3458
4
TYPICAL PERFOR A CE CHARACTERISTICS
1200
1000
1.05
1.03
1.01
0.99
0.95
0.97
800
600
400
200
0
–45
1.5
Frequency Accuracy
Maximum Load Current
1.8 to 5.5V
R
RT = 200k
–30
ILIM
2.0
–15
= 124k
2.5
IN
TEMPERATURE (°C)
0
at 700kHz
3.0
15
V
IN
3.5
(V)
30
4.0
45
3.3V
7.5V
5V
4.5
60
OUT
W
OUT
OUT
5.0
75
3458 G07
3458 G10
U
90
5.5
1.24
1.22
1.20
1.25
1.23
1.21
0.9
0.8
0.7
0.5
1.0
0.6
95
93
91
89
87
85
500
–45
–45
Efficiency vs Frequency
SHDN Pin Threshold and
Hysteresis
FB Voltage
V
V
IN
OUT
–30
–30
= 3.3V
= 5V at 100mA
700
–15
–15
SHUTDOWN
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY (kHz)
0
0
900
OPERATING
15
15
30
30
1100
45
45
1300
60
60
75
75
(T
3458 G08
3458 G11
3458 G13
A
1500
90
90
= 25°C unless otherwise specified)
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.5
0.4
0.3
0.2
0.1
0
–45
–40
N-Channel and P-Channel R
SYNC Pin Threshold
V
V
–30
IN
OUT
= 3.3V
= 5V
–15
–15
P-CHANNEL
www.DataSheet4U.com
TEMPERATURE (°C)
TEMPERATURE (°C)
0
10
15
30
N-CHANNEL
35
45
60
60
DS(ON)
75
3458 G09
3458 G12
3458f
90
85