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參數(shù)資料
| 型號(hào)： | LT3800 |
| 廠商： | Linear Technology Corporation |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開(kāi)關(guān)穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 3/24頁(yè) |
| 文件大?。?/td> | 240K |
| 代理商： | LT3800 |
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LT3724
3
3724f
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LT3724 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 LT3724E is guaranteed to meet performance specifications
from 0
°
C to 125
°
C junction temperature. Specifications over the –40
°
C to
125
°
C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3724I is guaranteed over the full –40
°
C to 125
°
C operating junction
temperature range.
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 20V, V
CC
= BOOST = BURST_EN = 10V, SHDN = 2V,
SENSE
–
= SENSE
+
= 10V, SGND = PGND = SW = 0V, unless otherwise noted.
The
●
denotes the specifications which apply over the full operating
Note 4:
V
IN
voltages below the start-up threshold (7.5V) are only
supported when the V
CC
is externally driven above 6.5V.
Note 5:
Operating range is dictated by MOSFET absolute maximum V
GS
.
Note 6:
Supply current specification does not include switch drive
currents. Actual supply currents will be higher.
Note 7:
DC measurement of gate drive output “ON” voltage is typically
8.6V. Internal dynamic bootstrap operation yields typical gate “ON”
voltages of 9.8V during standard switching operation. Standard operation
gate “ON” voltage is not tested but guaranteed by design.
SYMBOL
V
FB
PARAMETER
Error Amp Reference Voltage
CONDITIONS
Measured at V
FB
Pin
MIN
1.224
1.215
TYP
1.231
MAX
1.238
1.245
UNITS
V
V
●
I
FB
V
SHDN
Feedback Input Current
Enable Threshold (Rising)
Threshold Hysteresis
Common Mode Range
Current Limit Sense Voltage
Input Current
(I
SENSE+
+ I
SENSE–
)
25
1.35
120
nA
V
mV
●
1.3
1.4
V
SENSE
●
●
0
36
175
V
V
SENSE+
– V
SENSE–
V
SENSE(CM)
= 0V
2V < V
SENSE(CM)
< 3.5V
V
SENSE(CM)
> 4V
140
150
400
2
–150
200
mV
μ
A
μ
A
μ
A
kHz
kHz
I
SENSE
f
SW
Operating Frequency
190
175
210
220
●
V
FB(SS)
Soft-Start Disable Voltage
Soft-Start Disable Hysteresis
Soft-Start Capacitor Control Current
Error Amp Transconductance
Error Amp DC Voltage Gain
Error Amp Output Range
Error Amp Sink/Source Current
Gate Drive Output On Voltage (Note 7) C
LOAD
= 3300pF
Gate Drive Output Off Voltage
Gate Drive Rise/Fall Time
Minimum Switch Off Time
Minimum Switch On Time
SW Pin Sink Current
V
FB
Rising
1.185
300
2
340
62
1.2
±
30
9.8
0.1
60
350
300
300
V
mV
μ
A
I
SS
g
m
A
V
V
C
I
VC
V
TG
●
275
400
μ
mhos
dB
V
μ
A
V
V
ns
ns
ns
mA
Zero Current to Current Limit
C
LOAD
= 3300pF
10% to 90% or 90% to 10%, C
LOAD
= 3300pF
t
TG
t
TG(OFF)
t
TG(ON)
I
SW
●
500
V
SW
= 2V
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