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参数资料
| 型号： | LT1941EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/24页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG TRPL 28TSSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压），升压（升压），反相，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 3 |
| 输出电压： | 1.25 V ~ 40 V |
| 输入电压： | 3.5 V ~ 25 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.1MHz |
| 电流 - 输出： | 3A |
| 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： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
LT1941
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
V IN Pin ........................................................(–0.3V), 25V
BOOST Pin Voltage ...................................................35V
BOOST Above SW Pin ...............................................25V
BIAS1, BIAS2 Pins ....................................................25V
PGOOD, 5GOOD, 12GOOD Pins.................................25V
RUN/SS, V C , FB, NFB Pins ..........................................3V
SW1, SW2 Voltage .....................................................V IN
SW3 Voltage .............................................................40V
Maximum Junction Temperature (Note 6) ............ 125°C
V IN
V IN
SW1
SW1
BOOST1
PGOOD1
V C1
FB1
PGOOD2
1
2
3
4
5
6
7
8
9
TOP VIEW
29
28 BIAS2
27 SW3
26 PGND
25 V IN
24 BOOST2
23 SW2
22 V IN
21 PGOOD3
20 FB3
Operating Ambient Temperature Range
(Note 2).................................................... –40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
V C2 10
FB2 11
RUN/SS1 12
RUN/SS2 13
RUN/SS3 14
19 NFB
18 V C3
17 5GOOD
16 12GOOD
15 BIAS1
FE PACKAGE
28-LEAD PLASTIC TSSOP
T JMAX = 125°C, θ JA = 25°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT1941EFE#PBF
LEAD BASED FINISH
LT1941EFE
TAPE AND REEL
LT1941EFE#TRPBF
TAPE AND REEL
LT1941EFE#TR
PART MARKING
LT1941EFE
PART MARKING
LT1941EFE
PACKAGE DESCRIPTION
28-LEAD PLASTIC TSSOP
PACKAGE DESCRIPTION
28-LEAD PLASTIC TSSOP
TEMPERATURE RANGE
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
Consult LTC Marketing for parts speci?ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speci?cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating temperature
range, otherwise speci?cations are at T A = 25°C. V IN , V BIAS1 , V BIAS2 = 5V, V BOOST1 , V BOOST2 = 8V, unless otherwise noted. (Note 2)
PARAMETER
Minimum Operating Voltage
V IN Quiescent Current
BIAS1 Quiescent Current
BIAS2 Quiescent Current
Shutdown Current
Reference Voltage Line Regulation
V C Source Current
V C Sink Current
CONDITIONS
Not Switching
Not Switching
Not Switching
V RUNSS1,2,3 = 0V
5V < V IN < 25V
V C = 0.6V
V C = 0.6V
l
MIN
TYP
3.3
2
5
1.6
50
0.01
100
100
MAX
3.5
3.5
7.5
2.2
75
UNITS
V
mA
mA
mA
μA
%/V
μA
μA
V C Clamp Voltage
1.7
V
Switching Frequency
l
0.9
1.1
1.35
MHz
1941fb
2
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