參數(shù)資料
型號: LT3957EUHE#TRPBF
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(shù): 22/28頁
文件大?。?/td> 359K
代理商: LT3957EUHE#TRPBF
LT3957
3
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
VIN Operating Range
340
V
VIN Shutdown IQ
EN/UVLO = 0V
EN/UVLO = 1.15V
0.1
1
6
μA
VIN Operating IQ
VC = 0.3V, RT = 41.2k
1.7
2.3
mA
VIN Operating IQ with Internal LDO Disabled
VC = 0.3V, RT = 41.2k, INTVCC = 5.5V
350
400
μA
SW Pin Current Limit
l
5
5.9
6.8
A
SW Pin On Voltage
ISW = 3A
100
mV
SENSE2 Input Bias Current
Current Out of Pin
–65
μA
Error Amplier
FBX Regulation Voltage (VFBX(REG))
FBX > 0V (Note 3)
FBX < 0V (Note 3)
l
1.569
–0.816
1.6
–0.800
1.631
–0.784
V
FBX Overvoltage Lockout
FBX > 0V (Note 4)
FBX < 0V (Note 4)
6
7
8
11
10
14
%
FBX Pin Input Current
FBX = 1.6V (Note 3)
FBX = –0.8V (Note 3)
–10
70
100
10
nA
Transconductance gm (ΔIVC/ΔFBX)
(Note 3)
230
μS
VC Output Impedance
(Note 3)
5
VFBX Line Regulation (ΔVFBX/[ΔVIN VFBX(REG)])
FBX > 0V, 3V < VIN < 40V (Notes 3, 6)
FBX < 0V, 3V < VIN < 40V (Notes 3, 6)
0.04
0.03
0.06
%/V
VC Current Mode Gain (
ΔVVC/ΔVSENSE)
10
V/V
VC Source Current
VC = 1.5V, FBX = 0V, Current Out of Pin
–15
μA
VC Sink Current
FBX = 1.7V
FBX = –0.85V
12
11
μA
Oscillator
Switching Frequency
RT = 140k to SGND, FBX = 1.6V, VC = 1.5V
RT = 41.2k to SGND, FBX = 1.6V, VC = 1.5V
RT = 10.5k to SGND, FBX = 1.6V, VC = 1.5V
80
270
850
100
300
1000
120
330
1200
kHz
RT Voltage
FBX = 1.6V
1.2
V
SW Minimum Off-Time
220
275
ns
SW Minimum On-Time
240
320
ns
SYNC Input Low
0.4
SYNC Input High
1.5
SS Pull-Up Current
SS = 0V, Current Out of Pin
–10
μA
Low Dropout Regulator
INTVCC Regulation Voltage
l
5
5.2
5.45
V
INTVCC Undervoltage Lockout Threshold
Falling INTVCC
UVLO Hysteresis
2.6
2.7
0.15
2.85
V
相關(guān)PDF資料
PDF描述
LT3957IUHE#PBF SWITCHING REGULATOR, PQCC36
LT3958IUHE#PBF SWITCHING REGULATOR, PQCC36
LT3958EUHE#PBF SWITCHING REGULATOR, PQCC36
LT3958EUHE#TRPBF SWITCHING REGULATOR, PQCC36
LT4180MPGN#PBF POWER SUPPLY SUPPORT CKT, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3957IUHE#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(guān)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(shù):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(guān):- 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
LT3957IUHE#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(guān)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(shù):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(guān):- 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
LT3957IUHEPBF 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
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