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LTC3458LEDE 数据表(PDF) 3 Page - Linear Technology

部件名 LTC3458LEDE
功能描述  1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3458LEDE 数据表(HTML) 3 Page - Linear Technology

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LTC3458L
3
3458lf
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SHDN Input High
●
1.25
V
SHDN Input Low
●
0.3
V
BURST Mode Peak Current (IBURSTPEAK)RILIM = 84.5k
0.55
A
BURST Threshold Voltage
1.10
V
The
● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, VOUT = 5V, RT = 200k, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125
°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 3: The LTC3458LE is guaranteed to meet performance specifications
from 0
°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
ILIMIT, IBURSTPEAK, IZERO Currents
Burst Mode Quiescent Current
Maximum Load Current in Burst
Oscillator Programming Resistor
Current Limit Accuracy
Typical Burst Mode Threshold and
Hysteresis vs RBURST
(TA = 25°C unless otherwise specified)
TEMPERATURE (
°C)
TEMPERATURE (
°C)
VIN (V)
–40
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
10
15
60
3458L G03
3458L G01
3458L G02
5
0
–15
10
35
85
20
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
0
–200
ILIMIT
IBURSTPEAK
IZERO
IVIN
IVOUT
VIN = 3.3V
VOUT = 5V
3458L G04
3458L G05
3458L G06
RBURST (kΩ)
50
200
300
100
150
250
160
140
120
100
80
60
40
20
0
VIN (V)
1.5
300
250
200
150
100
50
0
3.0
4.0
4.5
2.0
2.5
3.5
OSCILLATOR FREQUENCY (kHz)
400
600
550
500
450
400
350
300
250
200
150
100
1200
600
800
1000
1400
OUT OF
BURST
INTO
BURST
3.3VOUT
5VOUT
RILIM = 84.5k
–45
1.85
1.95
2.15
2.25
–15
15
30
90
2.05
–30
0
45
60
75
RILIMIT = 84.5k
VOUT = 5V
L = 7.4
µH
RLIM = 84.5k



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