- 您现在的位置：买卖IC网 > PDF目录14458 > LT3430IFE-1#PBF (Linear Technology)IC REG BUCK ADJ 3A 16TSSOP PDF资料下载
参数资料
| 型号： | LT3430IFE-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3A 16TSSOP |
| 标准包装： | 95 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.2 V ~ 54 V |
| 输入电压： | 5.5 V ~ 60 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-TSSOP-EP |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
LT3430/LT3430-1
APPLICATIONS INFORMATION
LT3430
TO FREQUENCY
SHIFTING
V SW
L1
OUTPUT
5V
ERROR
1.4V
Q1
AMPLIFIER
+
1.2V
R1
–
R3
1k
R4
2k
FB
+
C1
BUFFER
Q2
TO SYNC CIRCUIT
R2
V C
GND
3430 F02
Figure 2. Frequency and Current Limit Foldback
tion should be used if resistors are increased beyond the
suggested values and short-circuit conditions occur with
high input voltage. High frequency pickup will increase
and the protection accorded by frequency and current
foldback will decrease.
Choosing the Inductor
For most applications, the output inductor will fall into
the range of 5μH to 47μH (10μH to 100μH for LT3430-1).
20mV/DIV
20mV/DIV
V OUT USING
100 μ F CERAMIC
OUTPUT
CAPACITOR
V OUT USING
100 μ F 0.08 ?
TANTALUM
OUTPUT
CAPACITOR
Lower values are chosen to reduce physical size of the
inductor. Higher values allow more output current because
V IN = 40V
V OUT = 5V
L = 22 μ H
2 μ s/DIV
3430 F03
they reduce peak current seen by the LT3430/LT3430-1
switch, which has a 3A limit. Higher values also reduce
output ripple voltage.
When choosing an inductor you will need to consider
output ripple voltage, maximum load current, peak induc-
tor current and fault current in the inductor. In addition,
other factors such as core and copper losses, allowable
component height, EMI, saturation and cost should also
be considered. The following procedure is suggested
as a way of handling these somewhat complicated and
con?icting requirements.
Output Ripple Voltage
Figure 3 shows a comparison of output ripple voltage for
the LT3430/LT3430-1 using either a tantalum or ceramic
output capacitor. It can be seen from Figure 3 that output
ripple voltage can be signi?cantly reduced by using the
Figure 3. LT3430 Output Ripple Voltage Waveforms.
Ceramic vs Tantalum Output Capacitors
ceramic output capacitor; the signi?cant decrease in out-
put ripple voltage is due to the very low ESR of ceramic
capacitors.
Output ripple voltage is determined by ripple current (I LP-P )
through the inductor and the high frequency impedance of
the output capacitor. At high frequencies, the impedance
of the tantalum capacitor is dominated by its effective
series resistance (ESR).
Tantalum Output Capacitor
The typical method for reducing output ripple voltage
when using a tantalum output capacitor is to increase the
inductor value (to reduce the ripple current in the inductor).
The following equations will help in choosing the required
34301fa
9
相关PDF资料 |
PDF描述 |
|---|---|
| LT1374HVCR#PBF | IC REG BUCK ADJ 4.5A D2PAK |
| LT1941EFE#PBF | IC REG MULTI CONFIG TRPL 28TSSOP |
| LT1506CR-3.3#PBF | IC REG BUCK 3.3V 4.5A D2PAK |
| RCA35DTAN | CONN EDGECARD 70POS R/A .125 SLD |
| EBM10DTAT-S273 | CONN EDGECARD 20POS R/A .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3430IFEPBF | 制造商:Linear Technology 功能描述:Sw. Regulator 3A 200kHz 60V TSSOP16EP |
| LT3431 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage, 3A,500kHz Step-Down Switching Regulator |
| LT3431EFE | 功能描述:IC REG BUCK ADJ 3A 16TSSOP RoHS:否 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 |
| LT3431EFE#PBF | 功能描述:IC REG BUCK ADJ 3A 16TSSOP 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 |
| LT3431EFE#TR | 功能描述:IC REG BUCK ADJ 3A 16TSSOP RoHS:否 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 |
发布紧急采购，3分钟左右您将得到回复。