參數(shù)資料
型號(hào)： LTC3728
廠商： Linear Technology Corporation
英文描述： 2-Phase Step-Up DC/DC Controller
中文描述： 2相升壓型DC / DC控制器
文件頁數(shù)： 3/16頁
文件大小： 200K
代理商： LTC3728
LT3782
3
3782fa
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC
= 13V, R
SET
= 80k, operating maximum V
CC
= 24V, no load on any
outputs, unless otherwise noted.
The
●
denotes the specifications which apply over the full operating
SYMBOL
Current Amplifier CA1, CA2
Voltage Gain
V
C
/
V
SENSE
Current Limit (V
SENSE1+
– V
SENSE1–
) (V
SENSE2+
– V
SENSE2–
)
Input Current (I
SENSE1+
, I
SENSE1–
, I
SENSE2+
, I
SENSE2–
)
Oscillator
Switching Frequency
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LT3782 is guaranteed to meet performance specifications
from 0
°
C to 70
°
C. Specifications over the –40
°
C to 125
°
C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
4
50
62
60
80
mV
μ
A
V
SENSE
= 0V
R
SET
= 130k
R
SET
= 80k
R
SET
= 40k
Rising Edge V
SYNC
R
SET
= 130k
R
SET
= 80k
R
SET
= 40k
R
SET
= 80k
V
FB
= V
REF
– 25mV, R
SET
> 80K
●
●
●
130
212
386
0.8
180
290
550
154
250
465
1.2
177
288
533
2
240
392
715
kHz
kHz
kHz
Synchronization Pulse Threshold on SYNC Pin
Synchronization Frequency Range
(Note: Operation Switching Frequency Equals
Half of the Synchronization Frequency)
V
RSET
Maximum Duty Cycle
V
kHz
kHz
kHz
2.3
94
90
50
75
V
●
●
90
83
%
%
%
%
R
SET
= 40K
Duty Cycle Limit
R
SET
= 80k , V
DCL
≤
0.3V
V
DCL
= 1.2V
V
DCL
= V
RSET
Max Duty Cycle
–0.1
DCL Pin Input Current
Gate Driver
V
GBIAS
BGATE1, BGATE2 High Voltage
V
DCL
= 0.3V
●
–0.3
μ
A
I
GBIAS
< 70mA
13V
≤
V
CC
≤
24V, I
BGATE
= –100mA
V
CC
= 8V, I
BGATE
= –100mA
Capacitive Load >22
μ
F
Capacitive Load >50
μ
F
8V
≤
V
CC
≤
24V, I
BGATE
= 100mA
Capacitive Load >22
μ
F
Capacitive Load >50
μ
F
8V
≤
V
CC
≤
24V, I
SGATE
= –20mA
8V
≤
V
CC
≤
24V, I
SGATE
= 20mA
500pF Load
DELAY Pin and R
SET
Pin Shorted
V
DELAY
= 1V
V
DELAY
= 0.5V
V
DELAY
= 0.25V
V
DELAY
= 0.25V
●
10.2
7.8
3.8
11
9.2
5
3
4
0.5
3
4
5.5
0.5
100
100
150
250
500
–0.1
11.7
10.5
V
V
V
A
A
V
A
A
V
V
●
●
BGATE1, BGATE2 Source Current (Peak)
BGATE1, BGATE2 Low Voltage
BGATE1, BGATE2 Sink Current (Peak)
●
0.7
SGATE1, SGATE2 High Voltage
SGATE1, SGATE2 Low Voltage
SGATE1, SGATE2 Peak Current
Delay of BGATE High
●
4.5
6.7
0.7
mA
ns
ns
ns
ns
μ
A
Delay Pin Input Current
●
–0.3
Note 3:
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.
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