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参数资料
| 型号： | LT3957EUHE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 36VQFN |
| 特色产品： | LT?3957/LT?3958 Converters |
| 标准包装： | 61 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.6 V ~ 40 V |
| 输入电压： | 3 V ~ 40 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz ~ 1MHz |
| 电流 - 输出： | 5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 36-QFN-EP（6x5） |
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LT3957
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating temp-
erature range, otherwise speci?cations are at T A ≈ T J = 25°C. V IN = 24V, EN/UVLO = 24V, SENSE2 = 0V, unless otherwise noted.
PARAMETER
INTV CC Current Limit
CONDITIONS
V IN = 40V
MIN
32
TYP
40
MAX
55
UNITS
mA
V IN = 15V
95
mA
INTV CC Load Regulation ( Δ V INTVCC / V INTVCC )
0 < I INTVCC < 20mA, V IN = 8V
–1
–0.5
%
INTV CC Line Regulation ( Δ V INTVCC / [ Δ V IN ? V INTVCC ]) 6V < V IN < 40V
0.02
0.05
%/V
Dropout Voltage (V IN – V INTVCC )
INTV CC Current in Shutdown
INTV CC Voltage to Bypass Internal LDO
V IN = 5V, I INTVCC = 20mA, VC = 0V
EN/UVLO = 0V, INTV CC = 6V
450
17
5.5
mV
μA
V
Logic Inputs
EN/UVLO Threshold Voltage Falling
V IN = INTV CC = 6V
l
1.17
1.22
1.27
V
EN/UVLO Voltage Hysteresis
20
mV
EN/UVLO Input Low Voltage
I VIN Drops Below 1μA
0.4
V
EN/UVLO Pin Bias Current Low
EN/UVLO Pin Bias Current High
EN/UVLO = 1.15V
EN/UVLO = 1.33V
1.7
2
20
2.5
100
μA
nA
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 LT3957E is guaranteed to meet performance speci?cations
from the 0°C to 125°C operating junction temperature. Speci?cations over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LT3957I is guaranteed over the full –40°C to 125°C operating junction
temperature range.
Note 3: The LT3957 is tested in a feedback loop which servos V FBX to the
reference voltages (1.6V and –0.8V) with the VC pin forced to 1.3V.
Note 4: FBX overvoltage lockout is measured at V FBX(OVERVOLTAGE) relative
to regulated V FBX(REG) .
Note 5: For 3V ≤ V IN < 6V, the EN/UVLO pin must not exceed V IN .
Note 6: EN/UVLO = 1.33V when V IN = 3V.
TYPICAL PERFORMANCE CHARACTERISTICS
T A ≈ T J = 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
V IN = 40V
–790
V IN = INTV CC = 3V
SHDN/UVLO = 1.33V
1600
1590
V IN = 24V
V IN = 8V
–792
–794
–796
V IN = 8V
1.7
1.6
V IN = 40V
V IN = 24V
–798
1585
V IN = INTV CC = 3V,
SHDN /UVLO = 1.33V
–800
V IN = 24V
V IN = 40V
1.5
V IN = INTV CC = 3V
–802
1580
–50
–25
0
25
50
75
100
125
–804
–50
–25
0
25
50
75
100
125
1.4
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
3957 G01
TEMPERATURE (°C)
3957 G02
TEMPERATURE (°C)
3957 G03
3957f
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3957EUHETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch |
| LT3957IUHE#PBF | 功能描述:IC REG MULTI CONFIG ADJ 36VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3957IUHE#TRPBF | 功能描述:IC REG MULTI CONFIG ADJ 36VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3957IUHEPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch |
| LT3957IUHETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch |
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