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參數(shù)資料
| 型號(hào)： | LTC3458L |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| 中文描述： | 1.7A，1.5MHz同步升壓型DC / DC轉(zhuǎn)換器輸出斷開 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 389K |
| 代理商： | LTC3458L |
LTC3458L
2
3458lf
V
IN
, SS, SYNC Voltages.................................–0.3 to 7V
BURST, SHDN, V
OUT
Operating Temperature Range
(Notes 2, 3) .........................................–40
°
C to 85
°
C
Storage Temperature Range..................–65
°
C to 125
°
C
SW Voltage
DC ........................................................... –0.3V to 7V
Pulsed <100ns ........................................ –0.3V to 8V
ORDER PART
NUMBER
T
JMAX
= 125
°
C,
θ
JA
= 45
°
C/W
LTC3458LEDE
ABSOLUTEW
(Note 1)
W
W
U
PACKAGE/ORDER IU
U
W
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 3.3V, V
OUT
= 5V, R
T
= 200k, unless otherwise noted.
The
●
denotes the specifications which apply over the full operating
PARAMETER
Minimum V
IN
Operating Voltage
CONDITIONS
T
A
= 0
°
C to 85
°
C
T
A
= –40
°
C to 0
°
C
MIN
TYP
1.4
1.4
MAX
1.5
1.7
6
1.25
1.25
UNITS
V
V
V
V
V
%
nA
μ
A
μ
A
μ
A
μ
A
mA
μ
A
μ
A
Output Voltage Adjust Range
Feedback Voltage
●
2
0
°
C to 85
°
C, V
OUT
= 3.3V
–40
°
C to 0
°
C
Below Feedback Voltage
V
FB
= 1.23V
V
IN
Current at 3.3V
V
OUT
Current at 5V
V
IN
Current at 3.3V
V
OUT
Current at 0V
V
IN
Current Switching
1.21
1.20
1.225
Undervoltage (Exit Burst Mode Operation)
Feedback Input Current
Quiescent Current – Burst Mode Operation
–4
1
12
5
0.5
1
1
0.05
0.05
0.2
0.3
2.1
90
50
30
10
1
3
3
5
5
Quiescent Current – Shutdown
Quiescent Current – Active
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
Fixed NMOS Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
Frequency Accuracy
Error Amplifier Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
SYNC Input High
SYNC Input Low
●
●
V
OUT
= 5V
V
OUT
= 5V
R
ILIM
= 84.5k
V
IN
= 3.3V, f
OSC
= 1MHz
●
1.7
80
A
%
%
●
●
0
R
T
= 200k
●
0.85
1
1.15
MHz
μ
A/V
μ
A
μ
A
60
7
7
●
1.5
V
V
●
0.35
Consult LTC Marketing for parts specified with wider operating temperature ranges.
12
11
10
9
8
7
1
2
3
4
5
6
V
OUT
BURST
SS
GND
COMP
FB
SW
V
IN
SYNC
SHDN
I
LIM
R
T
TOP VIEW
DE PACKAGE
12-LEAD (4mm
×
3mm) PLASTIC DFN
EXPOSED PAD IS PGND (PIN 13),
MUST BE SOLDERED TO PCB
13
DE PART MARKING
3458L
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