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参数资料
| 型号： | LT3757MPMSE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/36页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 10-MSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 电源电压： | 2.9 V ~ 40 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
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LT3757/LT3757A
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T A = 25°C. V IN = 24V, SHDN /UVLO = 24V, SENSE = 0V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INTV CC Voltage to Bypass Internal LDO
Logic Inputs
7.5
V
SHDN /UVLO Threshold Voltage Falling
V IN = INTV CC = 8V
l
1.17
1.22
1.27
V
SHDN /UVLO Input Low Voltage
I(V IN ) Drops Below 1μA
0.4
V
SHDN /UVLO Pin Bias Current Low
SHDN /UVLO Pin Bias Current High
SHDN /UVLO = 1.15V
SHDN /UVLO = 1.30V
1.7
2
10
2.5
100
μA
nA
Gate Driver
t r Gate Driver Output Rise Time
t f Gate Driver Output Fall Time
Gate V OL
Gate V OH
C L = 3300pF (Note 5), INTV CC = 7.5V
C L = 3300pF (Note 5), INTV CC = 7.5V
INTV CC –0.05
22
20
0.05
ns
ns
V
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3757E/LT3757AE are guaranteed to meet performance
specifications from the 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 LT3757I/LT3757AI are guaranteed over the full –40°C to
125°C operating junction temperature range. The LT3757H/LT3757AH are
guaranteed over the full –40°C to 150°C operating junction temperature
range. High junction temperatures degrade operating lifetimes. Operating
lifetime is derated at junction temperatures greater than 125°C. The
LT3757MP/LT3757AMP are 100% tested and guaranteed over the full
–55°C to 150°C operating junction temperature range.
Note 3: The LT3757/LT3757A are tested in a feedback loop which servos
V FBX to the reference voltages (1.6V and –0.8V) with the V C pin forced
to 1.3V.
Note 4: FBX overvoltage lockout is measured at V FBX(OVERVOLTAGE) relative
to regulated V FBX(REG) .
Note 5: Rise and fall times are measured at 10% and 90% levels.
Note 6: For V IN below 6V, the SHDN /UVLO pin must not exceed V IN .
Note 7: SHDN /UVLO = 1.33V when V IN = 2.9V.
Note 8: The LT3757/LT3757A include overtemperature protection that
is intended to protect the device during momentary overload conditions.
Junction temperature will exceed the maximum operating junction
temperature when overtemperature protection is active. Continuous
operation above the specified maximum operating junction temperature
may impair device reliability.
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C, unless otherwise noted.
1605
Positive Feedback Voltage
vs Temperature, V IN
–788
Negative Feedback Voltage
vs Temperature, V IN
1.8
Quiescent Current
vs Temperature, V IN
1600
1595
1590
1585
V IN = 40V
V IN = 24V
V IN = 8V
V IN = INTV CC = 2.9V
SHDN /UVLO = 1.33V
–790
–792
–794
–796
–798
–800
V IN = INTV CC = 2.9V
SHDN /UVLO = 1.33V
V IN = 8V
V IN = 24V
V IN = 40V
1.7
1.6
1.5
V IN = 40V
V IN = 24V
–802
V IN = INTV CC = 2.9V
1580
–75 –50 –25
0
25
50 75 100 125 150
–804
–75 –50 –25
0
25
50 75 100 125 150
1.4
–75 –50 –25
0
25
50 75 100 125 150
TEMPERATURE (°C)
3757 G01
TEMPERATURE (°C)
3757 G02
TEMPERATURE (°C)
3757 G03
3757afd
4
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