LTC3458L Linear Technology, LTC3458L Datasheet - Page 3

• Manufacturer Part Number: LTC3458L
• Description: 1.7A/ 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
PARAMETER
SHDN Input High
SHDN Input Low
BURST Mode Peak Current (I
BURST Threshold Voltage
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.
TYPICAL PERFOR A CE CHARACTERISTICS
2200
2000
1800
1600
1400
1200
1000
–200
800
600
400
200
160
140
120
100
80
60
40
20
0
0
2.0
50
I
Typical Burst Mode Threshold and
Hysteresis vs R
LIMIT
BURST
INTO
I
I
BURSTPEAK
ZERO
2.5
I
LIMIT
, I
100
BURSTPEAK
OUT OF
BURST
3.0
150
R
3.5
BURST
V
BURST
IN
, I
(V)
4.0
(kΩ)
BURSTPEAK
ZERO
200
4.5
V
L = 7.4µH
R
Currents
OUT
LIM
W
250
= 84.5k
= 5V
)
5.0
3458L G01
3458L G04
U
5.5
300
2.25
2.15
2.05
1.85
1.95
300
250
200
150
100
50
0
1.5
–45
A
Maximum Load Current in Burst
Current Limit Accuracy
= 25°C. V
R
R
ILIM
ILIMIT
–30
CONDITIONS
R
ILIM
2.0
= 84.5k
The
–15
= 84.5k
3.3V
= 84.5k
TEMPERATURE (°C)
●
IN
2.5
OUT
0
denotes the specifications which apply over the full operating
= 3.3V, V
15
V
IN
3.0
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.
(V)
30
3.5
OUT
45
5V
= 5V, R
60
OUT
4.0
(T
75
3458L G05
3458L G02
A
T
4.5
= 25°C unless otherwise specified)
90
= 200k, unless otherwise noted.
600
550
500
450
400
350
300
250
200
150
100
●
●
20
10
15
5
0
400
–40
Oscillator Programming Resistor
Burst Mode Quiescent Current
V
V
1.25
MIN
IN
OUT
= 3.3V
600
OSCILLATOR FREQUENCY (kHz)
= 5V
–15
www.DataSheet4U.com
TEMPERATURE (°C)
800
0.55
1.10
TYP
LTC3458L
10
I
I
VIN
VOUT
1000
MAX
35
0.3
1200
60
UNITS
1400
3458L G06
3458L G03
3
3458lf
V
V
A
V
85