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参数资料
| 型号： | LT1945IMS#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, PDSO8 |
| 封装： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件页数： | 2/8页 |
| 文件大小： | 121K |
| 代理商： | LT1945IMS#PBF |
LT1945
2
1945fa
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
VIN, SHDN1, SHDN2 Voltage.....................................15V
SW1, SW2 Voltage....................................................36V
NFB1 Voltage ............................................................–3V
FB2 Voltage............................................................... VIN
Current into NFB1 Pin ............................................–1mA
Current into FB2 Pin................................................1mA
Junction Temperature ........................................... 125°C
Operating Temperature Range (Note 2).... –40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
1
2
3
4
5
NFB1
SHDN1
GND
SHDN2
FB2
10
9
8
7
6
SW1
PGND
VIN
PGND
SW2
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 160°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT1945EMS#PBF
LT1945EMS#TRPBF
LTTS
10-Lead Plastic MSOP
–40°C to 85°C
LT1945IMS#PBF
LT1945IMS#TRPBF
LTTS
10-Lead Plastic MSOP
–40°C to 125°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT1945EMS
LT1945EMS#TR
LTTS
10-Lead Plastic MSOP
–40°C to 85°C
LT1945IMS
LT1945IMS#TR
LTTS
10-Lead Plastic MSOP
–40°C to 125°C
Consult LTC Marketing for parts specied with wider operating temperature ranges. *The temperature grade is identied by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specications, go to: http://www.linear.com/tapeandreel/
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
1.2
V
Quiescent Current, (per Converter)
Not Switching
VSHDN = 0V
20
30
1
μA
NFB1 Comparator Trip Point
–40°C < TJ < 85°C
–40°C < TJ < 125°C
–1.205
–1.195
–1.23
–1.255
1.255
V
FB2 Comparator Trip Point
–40°C < TJ < 85°C
–40°C < TJ < 125°C
1.205
1.195
1.23
1.255
V
FB Comparator Hysteresis
8mV
NFB1, FB2 Voltage Line Regulation
1.2V < VIN < 12V
0.05
0.1
%/V
NFB1 Pin Bias Current (Note 3)
VNFB1= –1.23V
l
1.3
2
2.9
μA
FB2 Pin Bias Current (Note 4)
–40°C < TJ < 85°C
–40°C < TJ < 125°C
30
80
300
nA
Switch Off Time, Switcher 1 (Note 5)
400
ns
Switch Off Time, Switcher 2 (Note 5)
VFB2 > 1V
VFB2 < 0.6V
400
1.5
ns
μs
Switch VCESAT
ISW = 300mA
250
350
mV
Switch Current Limit
250
350
400
mA
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.
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| 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 |
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