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| 型号： | LT3509EMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.7A DL 16MSOP |
| 标准包装： | 37 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 35.3 V |
| 输入电压： | 3.6 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 260kHz ~ 2.15MHz |
| 电流 - 输出： | 700mA |
| 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-TFSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-MSOP，裸露焊盘 |
| 产品目录页面： | 1332 (CN2011-ZH PDF) |
LT3509
Dual 36V, 700mA
Step-Down Regulator
FEATURES
DESCRIPTION
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Two 700mA Switching Regulators with Internal
Power Switches
Wide 3.6V to 36V Operating Range
Overvoltage Lockout Protects Circuit Through 60V
Supply Transients
Short-Circuit Robust
Low Dropout Voltage: 95% Maximum Duty Cycle
Adjustable 300kHz to 2.2MHz Switching Frequency
Synchronizable Over the Full Range
Uses Small Inductors and Ceramic Capacitors
Integrated Boost Diodes
Internal Compensation
Thermally Enhanced 14-Lead (4mm × 3mm)
DFN and 16 Lead MSOP Packages
The LT ? 3509 is a dual, current mode, step-down switching
regulator, with internal power switches each capable of
providing 700mA output current. This regulator provides a
compact and robust solution for multi-rail systems in harsh
environments. It incorporates several protection features
including overvoltage lockout and cycle-by-cycle current
limit. Thermal shutdown provides additional protection.
The loop compensation components and the boost diodes
are integrated on-chip. Switching frequency is set by a
single external resistor. External synchronization is also
possible. The high maximum switching frequency allows
the use of small inductors and ceramic capacitors for low
ripple. Constant frequency operation above the AM band
avoids interference with radio reception, making the LT3509
well suited for automotive applications. Each regulator
APPLICATIONS
has an independent shutdown and soft-start control pin.
When both converters are powered down, the common
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Automotive Electronics
Industrial Controls
Wall Transformer Regulation
Networking Devices
CPU, DSP, or FPGA Power
circuitry enters a low current shutdown state.
L , LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
TYPICAL APPLICATION
6.5V TO 36V
(TRANSIENT TO 60V)
3.3V and 5V Dual Output Step-Down Converter
90
Ef?ciency
2.2μF
V IN
BD
85
V OUT = 5V
3.3V
700mA
6.8μH
0.1μF
BOOST1 BOOST2
SW1 SW2
LT3509
0.1μF 10μH
5V
700mA
80
75
V OUT = 3.3V
31.6k
53.6k
70
MBRM140
DA1
FB1
DA2
FB2
MBRM140
22μF
65
10μF
RUN/SS1 RUN/SS2
60
10.2k
1nF
SYNC
GND
RT
60.4k
1nF
10.2k
55
50
0.0
V IN = 12V
f SW = 700kHz
0.1 0.2
0.3
0.4
0.5
0.6
0.7
f SW = 700kHz
3509 TA01a
LOAD CURRENT (A)
3509 TA01b
3509fc
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3509EMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 36V, 700mA Step-Down Regulator |
| LT3509HMSE#PBF | 功能描述:IC REG BUCK ADJ 0.7A DL 16MSOP 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 |
| LT3509HMSE#TRPBF | 功能描述:IC REG BUCK ADJ 0.7A DL 16MSOP 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 |
| LT3509IDE#PBF | 功能描述:IC REG BUCK ADJ 0.7A DL 14DFN 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 |
| LT3509IDE#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.2MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.2MHZ, DFN-14 |
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