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参数资料
| 型号： | LT3724MPFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST INV PWM 16TSSOP |
| 标准包装： | 95 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 225kHz |
| 占空比： | 100% |
| 电源电压： | 4 V ~ 60 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -55°C ~ 125°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 管件 |
LT3724
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
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.
SYMBOL
V BOOST
I BOOST
V CC
PARAMETER
Operating Voltage Range
Operating Voltage Range (Note 5)
UVLO Threshold (Rising)
UVLO Threshold Hysteresis
BOOST Supply Current (Note 6)
BOOST Burst Mode Current
BOOST Shutdown Current
Operating Voltage Range (Note 5)
Output Voltage
UVLO Threshold (Rising)
UVLO Threshold Hysteresis
CONDITIONS
V BOOST - V SW
V BOOST - V SW
V BOOST - V SW
V BURST_EN = 0V
V SHDN = 0V
Over Full Line and Load Range
l
l
l
l
MIN
TYP
5
400
1.4
0.1
0.1
8
6.25
500
MAX
75
20
20
8.3
UNITS
V
V
V
mV
mA
μA
μA
V
V
V
mV
I VCC
V FB
V CC Supply Current (Note 6)
V CC Burst Mode Current
V CC Shutdown Current
Short-Circuit Current
Error Amp Reference Voltage
V BURST_EN = 0V
V SHDN = 0V
Measured at V FB Pin
l
l
l
–30
1.224
1.215
1.7
80
20
–55
1.231
2.1
1.238
1.245
mA
μA
μA
mA
V
V
I FB
Feedback Input Current
25
nA
V SHDN
Enable Threshold (Rising)
Threshold Hysteresis
l
1.3
1.35
120
1.4
V
mV
V SENSE
Common Mode Range
Current Limit Sense Voltage
V SENSE+ – V SENSE–
l
l
0
140
150
36
175
V
mV
I SENSE
Input Current
(I SENSE+ + I SENSE– )
V SENSE(CM) = 0V
V SENSE(CM) = 2.5V
V SENSE(CM) > 4V
400
2
–150
μA
μA
μA
f SW
Operating Frequency
MP Grade
l
l
190
175
165
200
200
210
220
225
kHz
kHz
kHz
V FB(SS)
I SS
Soft-Start Disable Voltage
Soft-Start Disable Hysteresis
Soft-Start Capacitor Control Current
V FB Rising
1.185
300
2
V
mV
μA
g m
Error Amp Transconductance
l
275
340
400
μmhos
A V
Error Amp DC Voltage Gain
62
dB
V C
Error Amp Output Range
Zero Current to Current Limit
1.2
V
I VC
V TG
Error Amp Sink/Source Current
Gate Drive Output On Voltage (Note 7) C LOAD = 3300pF
Gate Drive Output Off Voltage C LOAD = 3300pF
±30
9.8
0.1
μA
V
V
t TG
t TG(OFF)
Gate Drive Rise/Fall Time
Minimum Switch Off Time
10% to 90% or 90% to 10%, C LOAD = 3300pF
60
350
ns
ns
t TG(ON)
I SW
Minimum Switch On Time
SW Pin Sink Current
V SW = 2V
l
300
300
500
ns
mA
3724fd
3
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