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参数资料
| 型号： | LT3434IFE |
| 厂商： | Linear Technology |
| 文件页数： | 1/24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： | 1.25 V ~ 54 V |
| 输入电压： | 3.3 V ~ 60 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 200kHz |
| 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 |
LT3434
High Voltage 3A, 200kHz
Step-Down Switching Regulator
with 100 μ A Quiescent Current
FEATURES
DESCRIPTIO
■
■
■
■
■
■
Wide Input Range: 3.3V to 60V
3A Peak Switch Current
Burst Mode ? Operation: 100 μ A Quiescent Current**
Low Shutdown Current: I Q < 1 μ A
Power Good Flag with Programmable Threshold
Load Dump Protection to 60V
The LT ? 3434 is a 200kHz monolithic buck switching
regulator that accepts input voltages up to 60V. A high
efficiency 3A, 0.1 ? switch is included on the die along with
all the necessary oscillator, control and logic circuitry.
Current mode topology is used for fast transient response
and good loop stability.
■ 200kHz Switching Frequency
■ Saturating Switch Design: 0.1 ?
■ Peak Switch Current Maintained Over
Full Duty Cycle Range*
■ 1.25V Feedback Reference Voltage
■ Easily Synchronizable
■ Soft-Start Capability
■ Small 16-Pin Thermally Enhanced TSSOP Package
APPLICATIO S
Innovative design techniques integrated in a new high
voltage process achieve high efficiency over a wide input
range. Efficiency is maintained over a wide output current
range by employing Burst Mode operation at low currents,
utilizing the output to bias the internal circuitry, and by
using a supply boost capacitor to fully saturate the power
switch. Patented circuitry maintains peak switch current
over the full duty cycle range.* Shutdown reduces input
supply current to less than 1 μ A. External synchronization
can be implemented by driving the SYNC pin with logic-level
■
■
■
■
■
High Voltage Power Conversion
14V and 42V Automotive Systems
Industrial Power Systems
Distributed Power Systems
Battery-Powered Systems
inputs. A single capacitor from the C SS pin to the output
provides a controlled output voltage ramp (soft-start). The
device also has a power good flag with a programmable
threshold and time-out, and thermal shutdown protection.
The LT3434 is available in a 16-pin TSSOP package with
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Burst Mode is a registered
trademark of Linear Technology Corporation. *Protected by U.S. Patents including
6498466. **See Burst Mode Operation section for conditions.
TYPICAL APPLICATIO
Exposed Pad leadframe for low thermal resistance.
Supply Current vs
Efficiency and Power Loss
100V
SW
C SS
V IN
14V to 3.3V Step-Down Converter with
100 μ A No Load Quiescent Current
V IN BOOST
4.7 μ F 0.68 μ F 33 μ H 4148
SHDN
CER LT3434 0.1 μ F
30MQ100
V C
V OUT
3.3V
2A
150
125
100
75
Input Voltage
V OUT = 3.3V
100
75
50
vs Load Current
V IN = 12V
V OUT = 5V
EFFICIENCY
V OUT = 3.3V
10
1
0.1
4700pF
10k
1 μ F
470pF
C T
SYNC
GND
V BIAS
FB
PGFB
PG
27pF
165k
1%
100k
1%
100 μ F
6.3V
TANT
50
25
25
TYPICAL POWER
LOSS
0.01
0
0
0.001
3434 TA01
0
10
20
30 40
50
60
0.0001
0.001
0.01
0.1
1
10
INPUT VOLTAGE (V)
3434 TA02a
LOAD CURRENT (A)
3434 TA02b
3434fb
1
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相关代理商/技术参数 |
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| LT3434IFE#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:- 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 |
| LT3434IFE#PBF | 制造商:Linear Technology 功能描述:IC, STEP-DOWN REGULATOR, 16-TSSOP |
| LT3434IFE#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 |
| LT3434IFE#TRPBF | 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:- 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 |
| LT3434IFEPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 60V TSSOP16EP |
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