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| 型号： | LT3433IFE |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST ADJ 0.5A 16TSSOP |
| 标准包装： | 95 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 3.3 V ~ 20 V |
| 输入电压： | 4 V ~ 60 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 500mA |
| 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 |
LT3433
High Voltage
Step-Up/Step-Down
DC/DC Converter
FEATURES
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
s
s
s
s
Automatic Step-Up and Step-Down Conversion
Uses a Single Inductor
Wide 4V to 60V Input Voltage Range
V OUT from 3.3V to 20V
Dual Internal 500mA Switches
100 μ A No-Load Quiescent Current
Low Current Shutdown
± 1% Output Voltage Accuracy
200kHz Operating Frequency
Boosted Supply Pin to Saturate High Side Switch
Frequency Foldback Protection
Current Limit Foldback Protection
Current Limit Unaffected by Duty Cycle
16-lead Thermally Enhanced TSSOP Package
The LT ? 3433 is a 200kHz fixed-frequency current mode
switching regulator that provides both step-up and step-
down regulation using a single inductor. The IC operates
over a 4V to 60V input voltage range making it suitable for
use in various wide input voltage range applications such
as automotive electronics that must withstand both load
dump and cold crank conditions.
Internal control circuitry monitors system conditions and
converts from single switch buck operation to dual switch
bridged operation when required, seamlessly changing
between step-down and step-up voltage conversion.
Optional Burst Mode ? operation reduces no-load quies-
cent current to 100 μ A and maintains high efficiencies with
APPLICATIO S
light loads.
Current limit foldback and frequency foldback help pre-
s
s
s
12V Automotive Systems
Wall Adapter Powered Systems
Battery Power Voltage Buffering
vent inductor current runaway during start-up. Program-
mable soft-start helps prevent output overshoot at start-up.
The LT3433 is available in a 16-lead thermally enhanced
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
U.S. patent number: 5731694
TYPICAL APPLICATIO
4V to 60V to 5V DC/DC Converter
TSSOP package.
Maximum Output
with Burst Mode Operation
1N4148
500
Current vs V IN
90
Efficiency
V IN
2.2 μ F
V IN
V BST
0.1 μ F
BUCK
V OUT = 5V
80
0.01 μ F
SHDN SWH
LT3433
B160A
400
70
V IN = 13.8V
330pF
SS
100 μ H
B120A
300
60
1nF
68k
V C
SWL
V OUT
V BIAS
1N4148
0.1 μ F
+
309k
V OUT
47 μ F
200
100
BRIDGED
50
40
30
V IN = 4V
BURST_EN
V FB
SGND PGND
100k
0
0
10
20
30
40
50
60
20
0.1
1
10 100
1000
3433 TA01
V IN (V)
3433 TA01c
OUTPUT CURRENT (mA)
3433 TA01b
3433f
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3433IFE#PBF | 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP 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 |
| LT3433IFE#TR | 功能描述:IC REG BUCK BST ADJ 0.5A 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 |
| LT3433IFE#TRPBF | 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP 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 |
| LT3433IFEPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Up/Down 60V TSSOP16 |
| LT3434 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage 3A, 200kHz Step-Down Switching Regulator with 100uA Quiescent Current |
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