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参数资料
| 型号： | LT3509IMSE#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件页数： | 1/24页 |
| 文件大小： | 271K |
| 代理商： | LT3509IMSE#TRPBF |
LT3509
1
3509fc
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual 36V, 700mA
Step-Down Regulator
The LT3509 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
has an independent shutdown and soft-start control pin.
When both converters are powered down, the common
circuitry enters a low current shutdown state.
3.3V and 5V Dual Output Step-Down Converter
n Two 700mA Switching Regulators with Internal
Power Switches
n Wide 3.6V to 36V Operating Range
n Overvoltage Lockout Protects Circuit Through 60V
Supply Transients
n Short-Circuit Robust
n Low Dropout Voltage: 95% Maximum Duty Cycle
n Adjustable 300kHz to 2.2MHz Switching Frequency
Synchronizable Over the Full Range
n Uses Small Inductors and Ceramic Capacitors
n Integrated Boost Diodes
n Internal Compensation
n Thermally Enhanced 14-Lead (4mm × 3mm)
DFN and 16 Lead MSOP Packages
n Automotive Electronics
n Industrial Controls
n Wall Transformer Regulation
n Networking Devices
n CPU, DSP, or FPGA Power
3509 TA01a
LT3509
GND
DA1
FB1
RUN/SS1
SYNC
DA2
FB2
RUN/SS2
RT
BD
VIN
BOOST2
BOOST1
SW2
SW1
10μH
fSW = 700kHz
0.1μF
6.5V TO 36V
(TRANSIENT TO 60V)
2.2μF
6.8μH
3.3V
700mA
5V
700mA
10μF
10.2k
31.6k
53.6k
MBRM140
1nF
22μF
10.2k
60.4k
1nF
LOAD CURRENT (A)
0.0
EFFICIENCY
(%)
70
75
80
0.7
3509 TA01b
60
65
50
55
0.1
0.2
0.6
90
85
0.5
0.4
0.3
VOUT = 3.3V
VOUT = 5V
VIN = 12V
fSW = 700kHz
Efciency
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.
相关PDF资料 |
PDF描述 |
|---|---|
| LT3509EMSE#TRPBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3509IDE#TRPBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO14 |
| LT3509IDE#PBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO14 |
| LT3509EDE#PBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO14 |
| LT3509EDE#TRPBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO14 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT350A | 功能描述:气体放电管 - GDT /气体等离子体避雷器 350V RoHS:否 制造商:Bourns 峰值脉冲电流: 直流击穿电压（标称）:4500 V 电极数量:2 系列:SA2 端接类型:Axial 故障安全保护 Y/N: 封装:Reel |
| LT350A-B | 功能描述:气体放电管 - GDT /气体等离子体避雷器 350V RoHS:否 制造商:Bourns 峰值脉冲电流: 直流击穿电压（标称）:4500 V 电极数量:2 系列:SA2 端接类型:Axial 故障安全保护 Y/N: 封装:Reel |
| LT350AK | 制造商:Linear Technology 功能描述:Standard Regulator Pos 3A 3-Pin(2+Tab) TO-3 |
| LT350AT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Positive Adjustable Voltage Regulator |
| LT350C | 功能描述:气体放电管 - GDT /气体等离子体避雷器 350V RoHS:否 制造商:Bourns 峰值脉冲电流: 直流击穿电压（标称）:4500 V 电极数量:2 系列:SA2 端接类型:Axial 故障安全保护 Y/N: 封装:Reel |
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