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参数资料
| 型号： | LT1939EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/24页 |
| 文件大小： | 349K |
| 描述： | IC REG DL BUCK/LINEAR 12DFN |
| 标准包装： | 121 |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 500kHz ~ 2.4MHz |
| 电压/电流 - 输出 1： | 0.8 V ~ 24.25 V，2A |
| 电压/电流 - 输出 2： | 0.8 V ~ 24.25 V，1A |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 3 V ~ 25 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN |
| 包装： | 管件 |
LT1939
2
1939f
The l denotes the speci cations which apply over the full operating
temperature range, otherwise speci cations are at T
J
= 25癈. V
VIN
= 15V, V
RT/SYNC
= 2V, unless otherwise speci ed.
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
IN
, PG, PG Operating ....................................25V/0.3V
SW .............................................................................V
IN
BST ................................................................45V/0.3V
BST Pin Above SW ....................................................25V
LDRV, SHDN ..............................................................15V
FB, LFB, R
T
/SYNC .......................................................5V
SS, V
C
......................................................................2.5V
Operating Junction Temperature Range (Notes 2, 6)
LT1939EDD ........................................40癈 to 125癈
LT1939IDD .........................................40癈 to 125癈
Storage Temperature Range ...................65癈 to 150癈
(Note 1)
TOP VIEW
DD PACKAGE
12-LEAD
3mm ?3mm PLASTIC DFN
12
13
11
8
9
10
4
5
3
2
1
SW
BST
LDRV
LFB
FB
PG
V
IN
SHDN
SS
PG
V
C
R
T
/SYNC
6
7
?/DIV>
JA
= 45癈/W, ?/DIV>
JC(PAD)
= 10癈/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT1939EDD#PBF
LT1939IDD#PBF
LT1939EDD#TRPBF
LT1939IDD#TRPBF
LDJZ
LDJZ
12-Lead (3mm ?3mm) Plastic DFN
12-Lead (3mm ?3mm) Plastic DFN
40癈 to 125癈
40癈 to 125癈
Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based nish parts.
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/
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SHDN Threshold
l
710 760 780 mV
SHDN Source Current
1.5 2.5 3.5 糀
SHDN Current Hysterisis
1.25 2 3.25 糀
Minimum Input Voltage (Note 3)
V
FB
= 0V
l
2.4 2.8
V
Supply Shutdown Current
V
SHDN
= 0V
l
12 30
糀
Supply Quiescent Current
V
FB
= 0.9V
2.5 3.5 mA
FB Voltage
V
VC
= 1V
V
VC
= 0.6V to 1.6V, V
IN
= 3V to 25V
l
l
0.784
0.776
0.8
0.8
0.816
0.824
V
V
FB Bias Current
V
FB
= 0.8V, V
VC
= 1V
50 150 nA
Error Ampli er g
m
V
VC
= 1V, I
VC
= ?0糀
150 250 350 糾ho
Error Ampli er Source Current
V
FB
= 0.6V, V
VC
= 1V
12 16 20
糀
Error Ampli er Sink Current
V
FB
= 1V, V
VC
= 1V
14 18 22
糀
Error Ampli er High Clamp
V
FB
= 0.6V
1.8 2.0 2.2
V
Error Ampli er Switching Threshold
V
FB
= 0.6V
0.6 0.8 1.0
V
SS Source Current
V
SHDN
= 1V, V
SS
= 0.4V, V
FB
= 0.9V
2.25 2.75 3.75 糀
ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1939EDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
| LT1939IDD#PBF | 功能描述:IC REG DL BUCK/LINEAR 12DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LT1939IDD#TRPBF | 功能描述:IC REG DL BUCK/LINEAR 12DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LT1939IDD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
| LT1939IDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
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