LT8582IDKD#PBF - Dual 3A DC/DC Converter | Analog Devices
料号： LT8582IDKD#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
LT8582IDKD#PBF 概述
A PWM DC/DC converter is a switching regulator that transfers energy between voltage rails using controlled transistor switching, inductors, capacitors, and feedback loops. The LT8582 belongs to the switching-regulator hierarchy within power-management semiconductors, where it offers greater topology flexibility than a fixed-output converter. Its two independent channels can generate separate positive or negative outputs, making it suitable for dual-rail and bipolar systems.
Key features include a power-good signal for event-based sequencing, external-clock synchronization, output short-circuit protection, and a high-gain shutdown input that accepts slowly changing signals. Each channel uses a master switch and a slave switch rated to 42 V. The verified distributor data identifies a maximum switch current of 3.3 A and a 3 A per-channel current capability, while the manufacturer describes tied switches for a 3 A total current limit.
The LT8582’s configurable topology allows one device to address boost, inverting, SEPIC, Cuk, and flyback requirements. The power-good output supports system-level sequencing, while fault protection helps guard against input overvoltage and overtemperature conditions. The exposed thermal pad improves heat transfer when the package is properly soldered to PCB copper.
Typical applications include industrial negative-rail generation, isolated or nonisolated auxiliary supplies, battery-powered systems, LED backlight drivers, and instrumentation requiring dual-polarity outputs. Because switch-node transitions can create EMI, careful layout, inductor selection, capacitor placement, and thermal-path design remain essential.
Designers should begin with the manufacturer’s recommended application circuits and verify switching frequency, compensation, current limit, output ripple, and startup behavior for the selected topology. Confirm exposed-pad soldering and thermal performance against the actual PCB stackup before production.
This product page consolidates verified Analog Devices and distributor information with engineering-oriented guidance. It distinguishes tube-packaged LT8582IDKD#PBF from the tape-and-reel LT8582IDKD#TRPBF variant and emphasizes replacement verification rather than treating similar package names as automatic compatibility.
直接替换替代料： LT8582IDKD#PBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
LT8582EDKD#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LT8582IDKD#TRPBF
✅ 直接替换📋 参考替代料（不在目录中）
LT8582IDKD
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LT8582IDKDPBF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LT8582EDKD
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LT8582IDKD#PBF 最大额定值与电气特性
| 拓扑 | Boost, Cuk, Flyback, SEPIC, and Inverting |
| Number of Channels | 2 independent channels |
| 输入电压范围 | 2.5 V to 22 V |
| Master and Slave Switch Rating | 42 V |
| Maximum Switch Current | 3.3 A |
| Channel Current Capability | 3 A per channel |
| 输出类型 | Positive or negative adjustable |
| Control Method | PWM |
| Power-Good | Yes, for event-based sequencing |
| Synchronization | External clock synchronization |
| Fault Protection | Input overvoltage and overtemperature protection |
| Output Short-Circuit Protection | Yes |
| Shutdown Input | High-gain SHDN pin accepting slowly changing signals |
| 封装 | 24-pin WFDFN exposed pad |
| Package Details | 24-WFDFN exposed pad |
| 安装类型 | Surface mount |
LT8582IDKD#PBF 24-wfdfn exposed pad 引脚配置指南
LT8582IDKD#PBF（24-wfdfn exposed pad 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： LT8582IDKD#PBF.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LT8582IDKD#PBF 适用于 7 应用s: Industrial Negative-Rail Power Supply, Dual-Polarity Instrumentation Supply, Battery-Powered Auxiliary Rail, LED Backlight and Lighting Driver, Communications and RF Auxiliary Rail, Automotive or Rugged 24-V System Power, Low-Noise Control and Sensor Rail.
Industrial Negative-Rail Power Supply
The LT8582IDKD#PBF fits industrial systems that need a regulated negative rail alongside a positive supply because each channel can be configured for boost, SEPIC, or inverting operation. Its 2.5 V to 22 V input range and 42 V switch rating provide a useful foundation for 3 A-class converter designs. The power-good output supports sequencing between the negative rail and sensitive downstream loads, while fault protection helps guard against overvoltage and overtemperature events. Designers must select the inductor, diode or synchronous switch arrangement, compensation network, and output capacitors for the selected topology and verify ripple and efficiency on the target PCB.
推荐
Dual-Polarity Instrumentation Supply
For test and measurement equipment, the LT8582IDKD#PBF can use its two independent channels to generate positive and negative rails from a common input, reducing the need for separate boost and inverting controllers. The two-channel architecture allows different voltage ratios and compensation settings, while the external-clock synchronization feature helps coordinate switching behavior in multi-converter systems. The power-good signal can inform the instrument’s acquisition or control electronics that a rail is ready. Careful common-mode layout and thermal design remain necessary because the converter’s high di/dt switch nodes can couple into sensitive analog circuitry.
推荐
Battery-Powered Auxiliary Rail
The LT8582IDKD#PBF is suitable for battery-powered systems that require regulated auxiliary rails above or below the battery voltage. Its configurable boost and inverting topologies address both step-up and polarity-reversing requirements, while the dual-channel configuration can provide independent rails for analog, communications, or control blocks. The 2.5 V minimum input supports low-voltage source designs, and the 42 V switch rating provides margin for transient environments when correctly selected external components are used. Designers should calculate worst-case efficiency, battery current, output ripple, and shutdown behavior across the complete discharge range before releasing the power-supply design.
推荐
LED Backlight and Lighting Driver
The LT8582IDKD#PBF can support LED-backlight or lighting systems where the required topology is boost or inverting and where two independent channels provide useful architecture flexibility. A boost channel can develop a higher LED-string voltage, while a second channel can supply a control or bias rail. The external-clock synchronization input allows the converter to coordinate with a system oscillator, and the power-good output can help sequence the lighting subsystem after startup. LED constant-current regulation still requires the appropriate sensing, compensation, switching-frequency, and thermal design; the controller’s dual-channel capability does not replace the application-specific LED feedback loop.
推荐
Communications and RF Auxiliary Rail
The LT8582IDKD#PBF can be used in communications equipment to create auxiliary positive or negative rails around a primary supply. Its dual independent channels allow one rail to serve control logic while another supports an analog or RF-related section, and the 42 V switch devices provide useful voltage headroom for higher intermediate bus levels. External-clock synchronization may help reduce uncontrolled interaction when several converters share a chassis. Because communications equipment is sensitive to conducted and radiated emissions, the final design must use short switch loops, careful high-current return paths, shielded magnetics where appropriate, and verified filtering rather than relying on filtering alone.
推荐
Automotive or Rugged 24-V System Power
The LT8582IDKD#PBF can be considered for rugged 24 V input systems because its verified input range extends to 22 V and its internal switch rating is 42 V. The dual-channel arrangement can provide separate auxiliary rails for control, sensors, or interface blocks, while the power-good output supports deterministic startup. The fault-protection functions help address overvoltage and overtemperature conditions, but automotive qualification, transient immunity, vibration packaging, and temperature-range requirements are not established by the supplied data. Use the official automotive product documentation and validate ISO 16750 or customer-specific transient tests before deployment.
推荐
Low-Noise Control and Sensor Rail
The LT8582IDKD#PBF can generate a separate control or sensor rail when the system requires adjustable positive or negative voltage from a shared source. Its two-channel format is useful when a controller, analog front end, and communications block require different voltage levels or polarities. The power-good indication lets a host processor delay sensitive measurements until startup is complete, and synchronization can provide a controlled relationship with other converters. For low-noise analog systems, place the converter and its high-current switching loop away from precision signal paths, use shielded or filtered connections where justified, and measure output ripple under the actual load transient.
推荐
推荐产品汇总
工程参考数据： LT8582IDKD#PBF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LT8582EDKD#PBF | LT8582IDKD#TRPBF | LT8582IDKD | LT8582IDKDPBF | LT8582EDKD |
|---|---|---|---|---|---|---|
| Package | 24-WFDFN exposed pad | 24-WFDFN exposed pad | 24-WFDFN exposed pad | 24-WFDFN exposed pad | 24-WFDFN exposed pad | 24-WFDFN exposed pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
关键差异点
- Two independently configurable converter channels （对比 LT8582EDKD#PBF)
- Explicit support for Cuk topology （对比 LT8582EDKD#PBF)
- Tube-packaged ordering option （对比 LT8582IDKD#TRPBF)
- Power-good sequencing and integrated fault protection （对比 LT8582EDKD#PBF)
设计说明
Place the input capacitor, switching components, and output capacitor as close as practical to the associated LT8582 channel. Keep the high-current switch loop compact and connect the exposed pad to a continuous thermal-copper region rather than a fragmented pour. Because the device supports multiple topologies, the power loop and ground-return geometry must be reviewed separately for boost, SEPIC, inverting, Cuk, and flyback configurations; a layout copied from a different topology can produce poor EMI or unstable loop behavior.
The 24-WFDFN exposed pad is the primary thermal path, so its solder fillet, via arrangement, and connected PCB copper area should match the Analog Devices package recommendations. Verify junction-temperature rise with the selected inductor, switching frequency, output voltage, and load rather than relying only on the controller’s nominal current rating. Keep the converter away from temperature-sensitive analog sections when possible, and provide copper area that can spread heat without compromising adjacent signal-integrity requirements.
Do not treat LT8582IDKD#PBF, LT8582IDKD#TRPBF, and LT8582EDKD#PBF as interchangeable solely because the listings use similar LT8582 names. Confirm the exact suffix, temperature grade, pin definitions, exposed-pad connection, and electrical limits against the official datasheet. Also avoid assuming that a 42 V internal switch rating is sufficient for the entire application; account for switch-node overshoot, inductor DCR, diode or MOSFET reverse voltage, and transient margin.
The LT8582’s PWM switching action can create conducted and radiated emissions through its high-dv/dt switch nodes. Use a minimal hot-loop area, controlled return paths, appropriate input filtering, and shielded or filtered magnetics where necessary. External-clock synchronization may help coordinate multiple converters, but it does not replace good layout or filtering. Measure emissions under the worst-case load and operating mode using the final board, enclosure, cable, and connector configuration.
Start each channel with a topology-specific power-loss calculation rather than using the 3 A switch capability as a guaranteed 3 A output capability. Account for switch conduction and switching loss, inductor DCR, diode or synchronous-rectifier loss, capacitor ESR, control overhead, and the voltage difference being converted. For a dual-channel design, also evaluate aggregate thermal rise because two nearby channels can share the same exposed-pad heat-removal path.
合规信息
The supplied excerpts do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for this exact ordering code. The #PBF suffix commonly indicates a lead-free termination, but that is not treated as a formal compliance declaration here.
