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参数资料
| 型号： | LT1943EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC REG SW QUAD TFT LCD 28-TSSOP |
| 标准包装： | 2,000 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 4.5 V ~ 22 V |
| 输出数： | 4 |
| 输出电压： | 1.25 V ~ 40 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
LT1943
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. RUN-SS, SS-234 = 2.5V unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SWITCH 4 (350mA INVERTER)
FB4 Voltage
FB4 Voltage Line Regulation
4.5V < V IN < 22V
●
1.23
1.22
1.25
0.01
1.27
1.27
0.03
V
V
%/V
FB4 Pin Bias Current
NFB4 Voltage (V FB4 -V NFB4 )
NFB4 Voltage Line Regulation
NFB4 Pin Bias Current
(Note 4)
4.5V < V IN < 22V
(Note 5)
●
●
1.215
1.205
100
1.245
0.01
100
600
1.275
1.275
0.03
600
nA
V
V
%/V
nA
Error Amplifier 4 Voltage Gain
200
V/V
Error Amplifier 4 Transconductance
? I = 5 μ A
450
μ mhos
Switch 4 Current Limit
Switch 4 V CESAT
Switch 4 Leakage Current
I SW4 = 0.3A
FB4 = 1.5V
●
0.35
0.5
260
0.1
0.7
390
1
A
mV
μ A
BIAS Pin Current due to SW4
Maximum Duty Cycle (SW4)
I SW4 = 0.3A
●
84
83
15
88
mA
%
%
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1943E is guaranteed to meet performance specifications
from 0 ° C to 70 ° C. Specifications over the –40 ° C to 85 ° C operating
temperature range are assured by design, characterization, and correlation
with statistical process controls.
Note 4: Current flows into FB1, FB2, FB3 and FB4 pins.
Note 5: Current flows out of NFB4 pin.
Note 6: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at high duty cycle.
Note 7: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 3: The C T pin is held low until FB1, FB2, FB3 and FB4 all ramp above
the FB threshold offset.
TYPICAL PERFOR A CE CHARACTERISTICS
Maximum Output Current
for V LOGIC = 3.3V
SW1 Current Limit vs Duty Cycle
SW1 Current Limit
2.8
T A = 25 ° C
5
T A = 25 ° C
4.5
2.6
4
2.4
2.2
2.0
L1 = 4.7 μ H
L1 = 3.3 μ H
3
TYPICAL
4.0
3.5
1.8
1.6
1.4
2
1
MINIMUM
3.0
1.2
0
5
10
15
20
0
0
20
40 60
80
100
2.5
–50
–25
0
25
50
75
100
125
INPUT VOLTAGE (V)
1943 G01
DUTY CYCLE (%)
1943 G02
TEMPERATURE ( ° C)
1943 G03
1943fa
4
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相关代理商/技术参数 |
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|---|---|
| LT1944 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad DCDC Converter for Triple Outputs TFT Supply Plus LED Driver |
| LT1944-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Micropower Step-Up DC/DC Converter |
| LT1944-1EMS | 功能描述:IC REG BST ADJ 0.1A/175MA 10MSOP RoHS:否 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT1944-1EMS#PBF | 功能描述:IC REG BST ADJ 0.1A/175MA 10MSOP 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT1944-1EMS#TR | 功能描述:IC REG BST ADJ 0.1A/175MA 10MSOP RoHS:否 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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