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参数资料
| 型号： | LT3481EMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 17/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 10MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.27 V ~ 20 V |
| 输入电压： | 3.6 V ~ 34 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 300kHz ~ 2.8MHz |
| 电流 - 输出： | 2A |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3481
APPLICATIONS INFORMATION
Hot Plugging Safely
L1
V OUT
C2
R RT
C C
The small size, robustness and low impedance of ceramic
capacitors make them an attractive option for the input
bypass capacitor of LT3481 circuits. However, these capaci-
tors can cause problems if the LT3481 is plugged into a
live supply (see Linear Technology Application Note 88 for
a complete discussion). The low loss ceramic capacitor,
R C
R2
R1
combined with stray inductance in series with the power
source, forms an under damped tank circuit, and the
voltage at the V IN pin of the LT3481 can ring to twice the
D1
C1
GND
R PG
nominal input voltage, possibly exceeding the LT3481’s
rating and damaging the part. If the input supply is poorly
controlled or the user will be plugging the LT3481 into an
3481 F09
energized supply, the input network should be designed to
VIAS TO LOCAL GROUND PLANE
VIAS TO V OUT
VIAS TO RUN/SS
VIAS TO PG
VIAS TO V IN
OUTLINE OF LOCAL
GROUND PLANE
prevent this overshoot. Figure 10 shows the waveforms
that result when an LT3481 circuit is connected to a 24V
Figure 9. A Good PCB Layout Ensures Proper, Low EMI Operation
CLOSING SWITCH
supply through six feet of 24-gauge twisted pair. The
DANGER
SIMULATES HOT PLUG
I IN
V IN
LT3481
V IN
20V/DIV
RINGING V IN MAY EXCEED
+
4.7μF
ABSOLUTE MAXIMUM RATING
LOW
IMPEDANCE
ENERGIZED
STRAY
INDUCTANCE
DUE TO 6 FEET
I IN
10A/DIV
24V SUPPLY
(2 METERS) OF
TWISTED PAIR
0.7Ω
LT3481
(10a)
V IN
20V/DIV
20μs/DIV
+
0.1μF
4.7μF
I IN
10A/DIV
(10b)
V IN
20μs/DIV
LT3481
20V/DIV
+
22μF
35V
+
4.7μF
AI.EI.
I IN
10A/DIV
(10c)
20μs/DIV
3481 F10
Figure 10. A Well Chosen Input Network Prevents Input Voltage Overshoot and
Ensures Reliable Operation when the LT3481 is Connected to a Live Supply
3481fc
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3481EMSE-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 2A, 2.8MHz Step-Down Switching Regulator with 50μA Quiescent Current |
| LT3481EMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 2A, 2.8MHz Step-Down Switching Regulator with 50μA Quiescent Current |
| LT3481HDD | 制造商:Linear Technology 功能描述:SW REG 36V 2A 2.8MHZ SD 10DFN |
| LT3481HDD#PBF | 功能描述:IC REG BUCK ADJ 2A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3481HDD#PBF | 制造商:Linear Technology 功能描述:SW REG 36V 2A 2.8MHZ SD 10DFN |
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