參數(shù)資料
型號： LT1942EUF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Quad DCDC Converter for Triple Outputs TFT Supply Plus LED Driver
中文描述： 4 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PQCC24
封裝： 4 X 4 MM, 0.75 MM HEIGHT, PLASTIC, MO-220WGGD, QFN-24
文件頁數(shù)： 3/16頁
文件大小： 248K
代理商： LT1942EUF
LT1942
3
1942fa
LED1-LED2 Current Matching
Current Into Each Pin = 20mA, V
LED1
= V
LED2
Current Into Each Pin = 20mA, |V
LED1
-V
LED2
| = 1V
20mA Into Pin, V
LED2
= 2V, FB4 = 0
20mA Into Pin, V
LED1
= 2V, FB4 = 0
Into Either Pin, V
LEDX
< 1.5V, FB4 = 0
V
SHDN
= 0V, V
LEDX
= 45V
SW1 Pin
SW2 Pin
SW3 Pin
SW4 Pin
SW1 Pin (Note 4)
SW1 Pin (Note 4)
SW2 Pin (Note 4)
SW2 Pin (Note 4)
SW3 Pin (Note 4)
SW3 Pin (Note 4)
SW4 Pin (Note 4)
SW4 Pin (Note 4)
D2 Pin, I = 60mA
D2 Pin, V
D2
= –36V
D3 Pin, I = 60mA
V
D3
= 36V, SW3 = 0V, Output Disconnect PNP Off
I = 250mA
V
D4
= 36V, SW4 = 0V
0
1
1
1
1.5
2.5
1.2
1.2
%
%
V
V
LED1 Voltage
LED2 Voltage
LED1, LED2 Maximum Current
LED1, LED2 Leakage Current
AV
DD
Maximum Duty Cycle
V
OFF
Maximum Duty Cycle
V
ON
Maximum Duty Cycle
LED Maximum Duty Cycle
AV
DD
Switch Current Limit at Minimum DC (SW1)
AV
DD
Switch Current Limit at Maximum DC (SW1)
V
OFF
Switch Current Limit at Minimum DC (SW2)
V
OFF
Switch Current Limit at Maximum DC (SW2)
V
ON
Switch Current Limit at Minimum DC (SW3)
V
ON
Switch Current Limit at Maximum DC (SW3)
LED Switch Current Limit at Minimum DC (SW4)
LED Switch Current Limit at Maximum DC (SW4)
V
OFF
Schottky Diode Forward Drop
V
OFF
Schottky Diode Leakage Current
V
ON
Schottky Diode Forward Drop
V
ON
Schottky Diode Leakage Current
LED Schottky Diode Forward Drop
LED Schottky Diode Leakage Current
Switching Frequency
SHDN Pin Current
35
mA
μ
A
%
%
%
%
mA
mA
mA
mA
mA
mA
mA
mA
●
1
88
75
75
88
150
80
50
30
50
30
550
450
93
86
86
93
200
140
80
60
80
60
750
600
0.65
250
200
110
90
110
90
900
850
V
●
1
μ
A
V
μ
A
V
μ
A
0.65
●
1
0.75
●
1
0.8
1
1.2
100
30
60
–150
1
300
250
250
400
5
5
MHz
μ
A
nA
μ
A
nA
μ
A
mV
mV
mV
mV
μ
A
μ
A
V
SHDN
= 3V
V
SHDN
= 0V
V
CTRL4
= 3V
V
CTRL4
= 0V
V
SWX
= 36V
I
SW1
= 100mA (Note 5)
I
SW2
= 40mA (Note 5)
I
SW3
= 40mA (Note 5)
I
SW4
= 400mA (Note 5)
V
SS
= 0.5V
V
SS
= 0.5V
●
70
20
30
–60
0.01
200
150
150
280
3
3
CTRL4 Pin Current
●
SW1-SW4 leakage Current
SW1 V
CESAT
SW2 V
CESAT
SW3 V
CESAT
SW4 V
CESAT
SS1 Charging Current
SS4 Charging Current
SHDN Input Voltage High
SHDN Input Voltage Low
CTRL4 Input Voltage High
CTRL4 Input Voltage Low
●
1
1
1
V
V
V
V
0.4
0.25
0.1
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 3.3V, V
SHDN
= V
IN
, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ELECTRICAL CHARACTERISTICS
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相關代理商/技術(shù)參數(shù)
參數(shù)描述
LT1942EUF#PBF 功能描述:IC REG SW QUAD TFT LCD 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件
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