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参数资料
| 型号： | LT1945IMS#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, PDSO8 |
| 封装： | PLASTIC, MSOP-8 |
| 文件页数： | 3/8页 |
| 文件大小： | 121K |
| 代理商： | LT1945IMS#TR |
LT1945
3
1945fa
ELECTRICAL CHARACTERISTICS The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 1.2V, VSHDN = 1.2V unless otherwise noted.
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 LT1945E is guaranteed to meet performance specications
from 0°C to 70°C junction temperature. Specications over the –40°C
to 85°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT1945I is guaranteed over the full –40°C to 125°C operating junction
temperature range.
Note 3: Bias current ows out of the NFB1 pin.
Note 4: Bias current ows into the FB2 pin.
Note 5: See Figure 1 for Switcher 1 and Switcher 2 locations.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SHDN Pin Current
VSHDN = 1.2V
VSHDN = 5V
2
8
3
12
μA
SHDN Input Voltage High
0.9
V
SHDN Input Voltage Low
0.25
V
Switch Leakage Current
Switch Off, VSW = 5V
0.01
5
μA
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
SWITCH
VOLTAGE
(V)
1945 G01
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
ISWITCH = 500mA
ISWITCH = 300mA
TEMPERATURE (°C)
–50
FEEDBACK
VOLTAGE
(V)
1945 G02
1.25
1.24
1.23
1.22
1.21
1.20
BIAS
CURRENT
(nA)
50
40
30
20
10
0
CURRENT
VOLTAGE
–25
0
25
50
75
100
TEMPERATURE (°C)
FEEDBACK
VOLTAGE
(V)
1945 G03
–1.25
–1.24
–1.23
–1.22
–1.21
–1.20
–50
–25
0
1
2
3
4
5
25
50
75
100
VOLTAGE
CURRENT
BIAS
CURRENT
(mA)
TEMPERATURE (°C)
SWITCH
OFF
TIME
(ns)
1945 G04
550
500
450
400
350
300
250
–50
–25
0
25
50
75
100
VIN = 1.2V
VIN = 12V
TEMPERATURE (°C)
PEAK
CURRENT
(mA)
1945 G05
400
350
300
250
200
150
100
50
0
–50
–25
0
25
50
75
100
VIN = 12V
VIN = 1.2V
TEMPERATURE (°C)
QUIESCENT
CURRENT
(μA)
1945 G06
25
23
21
19
17
15
–50
–25
0
25
50
75
100
VIN = 12V
VIN = 1.2V
VFB = 1.23V
NOT SWITCHING
Switch Off Time
Switch Current Limit
Quiescent Current
Switch Saturation Voltage
(VCESAT)
FB2 Pin Voltage and
Bias Current
NFB1 Pin Voltage and
Bias Current
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1946 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start |
| LT1946/LT1946A | 制造商:LINER 制造商全称:Linear Technology 功能描述:4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN |
| LT1946A | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2MHz Step-Up DC/DC Converter in SOT-23 |
| LT1946AEMS8E | 功能描述:IC REG BOOST ADJ 1.5A 8MSOP 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:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 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:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
| LT1946AEMS8E#PBF | 功能描述:IC REG BOOST ADJ 1.5A 8MSOP 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 |
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