參數(shù)資料
型號(hào): LT3724MPFE#TR
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, PDSO16
封裝: 4.40 MM, PLASTIC, TSSOP-16
文件頁(yè)數(shù): 20/26頁(yè)
文件大小: 309K
代理商: LT3724MPFE#TR
LT3724
3
3724fd
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 20V, VCC = BOOST = BURST_EN = 10V, SHDN = 2V,
SENSE= SENSE+ = 10V, SGND = PGND = SW = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VBOOST
Operating Voltage Range
Operating Voltage Range (Note 5)
UVLO Threshold (Rising)
UVLO Threshold Hysteresis
VBOOST - VSW
l
5
400
75
20
V
mV
IBOOST
BOOST Supply Current (Note 6)
BOOST Burst Mode Current
BOOST Shutdown Current
VBURST_EN = 0V
VSHDN = 0V
1.4
0.1
mA
A
VCC
Operating Voltage Range (Note 5)
Output Voltage
UVLO Threshold (Rising)
UVLO Threshold Hysteresis
Over Full Line and Load Range
l
8
6.25
500
20
8.3
V
mV
IVCC
VCC Supply Current (Note 6)
VCC Burst Mode Current
VCC Shutdown Current
Short-Circuit Current
VBURST_EN = 0V
VSHDN = 0V
l
–30
1.7
80
20
–55
2.1
mA
A
mA
VFB
Error Amp Reference Voltage
Measured at VFB Pin
l
1.224
1.215
1.231
1.238
1.245
V
IFB
Feedback Input Current
25
nA
VSHDN
Enable Threshold (Rising)
Threshold Hysteresis
l
1.3
1.35
120
1.4
V
mV
VSENSE
Common Mode Range
Current Limit Sense Voltage
VSENSE+ – VSENSE–
l
0
140
150
36
175
V
mV
ISENSE
Input Current
(ISENSE+ + ISENSE–)
VSENSE(CM) = 0V
VSENSE(CM) = 2.5V
VSENSE(CM) > 4V
400
2
–150
A
fSW
Operating Frequency
MP Grade
l
190
175
165
200
210
220
225
kHz
VFB(SS)
Soft-Start Disable Voltage
Soft-Start Disable Hysteresis
VFB Rising
1.185
300
V
mV
ISS
Soft-Start Capacitor Control Current
2
A
gm
Error Amp Transconductance
l
275
340
400
mhos
AV
Error Amp DC Voltage Gain
62
dB
VC
Error Amp Output Range
Zero Current to Current Limit
1.2
V
IVC
Error Amp Sink/Source Current
±30
A
VTG
Gate Drive Output On Voltage (Note 7)
Gate Drive Output Off Voltage
CLOAD = 3300pF
9.8
0.1
V
tTG
Gate Drive Rise/Fall Time
10% to 90% or 90% to 10%, CLOAD = 3300pF
60
ns
tTG(OFF)
Minimum Switch Off Time
350
ns
tTG(ON)
Minimum Switch On Time
l
300
500
ns
ISW
SW Pin Sink Current
VSW = 2V
300
mA
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