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參數資料
| 型號： | LT3957IUHE#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PQCC36 |
| 封裝： | 5 X 6 MM, LEAD FREE, PLASTIC, QFN-36 |
| 文件頁數： | 23/28頁 |
| 文件大?。?/td> | 359K |
| 代理商： | LT3957IUHE#PBF |
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LT3957
4
3957f
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating temp-
erature range, otherwise specications are at TA ≈ TJ = 25°C. VIN = 24V, EN/UVLO = 24V, SENSE2 = 0V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
INTVCC Current Limit
VIN = 40V
VIN = 15V
32
40
95
55
mA
INTVCC Load Regulation (ΔVINTVCC /VINTVCC)
0 < IINTVCC < 20mA, VIN = 8V
–1
–0.5
%
INTVCC Line Regulation (ΔVINTVCC /[ΔVIN VINTVCC]) 6V < VIN < 40V
0.02
0.05
%/V
Dropout Voltage (VIN – VINTVCC)VIN = 5V, IINTVCC = 20mA, VC = 0V
450
mV
INTVCC Current in Shutdown
EN/UVLO = 0V, INTVCC = 6V
17
μA
INTVCC Voltage to Bypass Internal LDO
5.5
V
Logic Inputs
EN/UVLO Threshold Voltage Falling
VIN = INTVCC = 6V
l
1.17
1.22
1.27
V
EN/UVLO Voltage Hysteresis
20
mV
EN/UVLO Input Low Voltage
IVIN Drops Below 1μA
0.4
V
EN/UVLO Pin Bias Current Low
EN/UVLO = 1.15V
1.7
2
2.5
μA
EN/UVLO Pin Bias Current High
EN/UVLO = 1.33V
20
100
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 specications
from the 0°C to 125°C operating junction temperature. Specications 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 VFBX 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 VFBX(OVERVOLTAGE) relative
to regulated VFBX(REG).
Note 5: For 3V ≤ VIN < 6V, the EN/UVLO pin must not exceed VIN.
Note 6: EN/UVLO = 1.33V when VIN = 3V.
TYPICAL PERFORMANCE CHARACTERISTICS
Positive Feedback Voltage
vs Temperature, VIN
Negative Feedback Voltage
vs Temperature, VIN
Quiescent Current
vs Temperature, VIN
TA ≈ TJ = 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
1580
REGULATED
FEEDBACK
VOLTAGE
(mV)
1590
1600
1605
0
50
75
1585
–25
25
100
125
3957 G01
VIN = 40V
VIN = 24V
VIN = 8V
VIN = INTVCC = 3V,
SHDN/UVLO = 1.33V
TEMPERATURE (°C)
–50
–804
REGULATED
FEEDBACK
VOLTAGE
(mV)
–802
–800
–796
–798
–794
–788
–790
0
50
75
–792
–25
25
100
125
3957 G02
VIN = 40V
VIN = 24V
VIN = 8V
VIN = INTVCC = 3V
SHDN/UVLO = 1.33V
TEMPERATURE (°C)
–50
1.4
QUIESCENT
CURRENT
(mA)
1.6
1.8
0
50
75
1.5
1.7
–25
25
100
125
3957 G03
VIN = 40V
VIN = 24V
VIN = INTVCC = 3V
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LT3957IUHETRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch |
| LT3958 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic High Voltage Isolated Flyback Converter No External Start-Up Resistor |
| LT3958EUHE#PBF | 功能描述:IC REG MULTI CONFIG ADJ 36VQFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT3958EUHE#PBF | 制造商:Linear Technology 功能描述:IC BOOST/FLYBACK/SEPIC/INVERT CTRL QFN36 |
| LT3958EUHE#TRPBF | 功能描述:IC REG MULTI CONFIG ADJ 36VQFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
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