LT1076CQ#PBF - 2A Buck/Boost/Flyback Regulator | Analog Devices
料号： LT1076CQ#PBF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.79 | $6.79 |
| 10 | $6.1 | $61.00 |
| 100 | $5.5 | $550.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.45 | $4,450.00 |
LT1076CQ#PBF 概述
A switching regulator is a voltage regulator that uses an inductor, switch, and diode to efficiently convert an input voltage to a desired output voltage. Unlike linear regulators, switching regulators achieve high efficiency by storing energy in the inductor and switching the power transistor on and off. The LT1076CQ#PBF belongs to the family of DC-DC converters, which are essential in power management systems for converting voltages in battery-powered devices, industrial equipment, and automotive electronics.
Key features of the LT1076CQ#PBF include a 2A switch current rating, wide input voltage range up to 60V, and the ability to operate in multiple topologies. The current-mode control architecture provides inherent cycle-by-cycle current limiting and simplifies loop compensation. The device also features thermal shutdown and a low quiescent current, making it suitable for power-sensitive applications.
The LT1076CQ#PBF uses a bipolar process technology, which provides robust performance and high reliability. The 100kHz switching frequency balances efficiency and component size, allowing for compact inductor and capacitor selections. The device's adjustable output voltage range of 2.5V to 50V provides flexibility for various output requirements.
Typical applications include industrial power supplies, battery chargers, distributed power systems, and automotive electronics. The device's ability to step up, step down, or invert voltage makes it a versatile choice for many power conversion needs.
When designing with the LT1076CQ#PBF, ensure proper PCB layout with short, low-inductance paths for the switch node and ground. Use appropriate input and output capacitors to minimize ripple and ensure stability. The thermal pad of the D2PAK package should be connected to a large copper area for heat dissipation.
直接替换替代料： LT1076CQ#PBF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LT1076CQ#PBF （相同外形与封装尺寸） ——差异在于 Function, Output Type, Package, RoHS Status, Switching Frequency.
快速对比工具——选择替代料号进行并排对比：
LT1076CQ-5#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LT1074CQ#PBF
✅ 直接替换📋 参考替代料（不在目录中）
LT1076CQ#TR
✅ 直接替换📋 参考替代料（不在目录中）
LT1076CQ#PBF 最大额定值与电气特性
| 功能 | Step-Down (Buck), Step-Up (Boost), Inverting, Flyback |
| 输出类型 | Adjustable |
| 输出电压范围 | 2.5 V to 50 V |
| Output Current | 2 A (Switch) |
| 输入电压范围 | Up to 60 V |
| 开关频率 | 100 kHz |
| PWM Type | Current Mode |
| 同步整流器 | No |
| 输出数量 | 1 |
| 封装 | TO-263-6 (D2PAK, 5 Leads + Tab) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead Free | Yes |
LT1076CQ#PBF 引脚配置
| 引脚 1 | VSW — Switch output |
| 引脚 2 | VIN — Input supply |
| 引脚 3 | GND — Ground |
| 引脚 4 | FB — Feedback |
| 引脚 5 | SHDN — Shutdown |
| 引脚 TAB | GND — Ground (thermal pad) |
典型应用
LT1076CQ#PBF 适用于 6 应用s: Industrial Power Supplies, Battery Chargers, Automotive Electronics, Distributed Power Systems, Telecom Equipment, LED Lighting Drivers.
Industrial Power Supplies
The LT1076CQ#PBF is ideal for industrial power supplies due to its wide input voltage range up to 60V and ability to step down high voltages efficiently. Its 2A switch current can power sensors, actuators, and control logic. The current-mode control ensures stable operation under varying loads, which is common in industrial environments. The device's robust bipolar design handles transients and provides reliable performance in harsh conditions.
推荐
Battery Chargers
The LT1076CQ#PBF can be configured as a buck converter for battery charging applications. Its adjustable output voltage from 2.5V to 50V allows it to charge various battery chemistries, including lead-acid and lithium-ion. The 100kHz switching frequency enables the use of small inductors, making the charger compact. The device's current-mode control provides accurate current limiting, essential for safe charging. Thermal shutdown protects the circuit during prolonged charging.
推荐
Automotive Electronics
In automotive applications, the LT1076CQ#PBF handles input voltages up to 60V, accommodating load-dump transients. It can step down the 12V battery rail to power microcontrollers, sensors, and infotainment systems. The device's high efficiency reduces heat dissipation in the engine compartment. Its robust bipolar construction withstands temperature extremes. The TO-263 package with exposed tab aids thermal management when mounted on a heatsink.
推荐
Distributed Power Systems
The LT1076CQ#PBF is suitable for distributed power architectures where multiple voltage rails are generated from a common bus. Its ability to step up, step down, or invert makes it flexible for generating positive and negative supplies. The 2A switch current can power local loads, reducing the need for centralized converters. The device's current-mode control simplifies loop compensation, easing design. Its wide input range allows it to operate from various bus voltages.
推荐
Telecom Equipment
Telecom equipment often requires multiple voltage rails from a -48V backplane. The LT1076CQ#PBF can be used in flyback or buck-boost configurations to generate positive and negative supplies. Its 100kHz switching frequency allows for compact magnetics, saving board space. The device's high input voltage rating handles the -48V rail with margin. Its current-mode control provides excellent line and load regulation, critical for reliable telecom operation.
推荐
LED Lighting Drivers
The LT1076CQ#PBF can drive LED strings in buck configuration, providing constant current with external sensing. Its adjustable output voltage allows matching the LED forward voltage. The 2A switch current can drive multiple LEDs in series. The device's high efficiency reduces heat in lighting fixtures. PWM dimming can be implemented by toggling the shutdown pin. The wide input range supports various AC-DC adapter outputs.
推荐
推荐产品汇总
工程参考数据： LT1076CQ#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 | LT1076CQ-5#PBF | LT1074CQ#PBF | LT1076CQ#TR |
|---|---|---|---|---|
| Package | TO-263-6 (D2PAK) | TO-263-6 (D2PAK) | TO-263-6 (D2PAK) | TO-263-6 (D2PAK) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Current | 2A (Switch) | 2A (Switch) | 5A (Switch) | 2A (Switch) |
| Output Voltage | Adjustable 2.5V to 50V | Fixed 5V | Adjustable 2.5V to 50V | Adjustable 2.5V to 50V |
| Switching Frequency | 100kHz | 100kHz | 100kHz | 100kHz |
| Input Voltage Max | 60V | 60V | 60V | 60V |
| Topology Support | Buck, Boost, Flyback, Inverting | Buck, Boost, Flyback, Inverting | Buck, Boost, Flyback, Inverting | Buck, Boost, Flyback, Inverting |
| RoHS | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Higher switch current than LT1076CQ-5#PBF （对比 LT1076CQ-5#PBF)
- Lower switch current than LT1074CQ#PBF （对比 LT1074CQ#PBF)
- Lead-free and RoHS compliant （对比 LT1076CQ#TR)
设计说明
For the LT1076CQ#PBF, ensure the switch node (VSW) trace is short and wide to minimize parasitic inductance and EMI. Place the input capacitor close to the VIN and GND pins. The feedback resistor divider should be placed near the FB pin with a small capacitor for noise filtering. Use a solid ground plane to reduce noise.
The TO-263 (D2PAK) package has a thermal pad that must be soldered to a large copper area on the PCB. For 2A output at high input-output differentials, power dissipation can be significant. Calculate the junction temperature using the thermal resistance and ensure it stays below the maximum rating. Add vias to the ground plane for better heat spreading.
Avoid using the LT1076CQ#PBF without proper input and output capacitance. The datasheet recommends a minimum of 100uF electrolytic on the input and 100uF on the output. Using ceramic capacitors alone may cause instability due to their low ESR. Also, ensure the feedback network is properly compensated to avoid oscillation.
合规信息
RoHS compliant and lead-free per #PBF suffix. Other compliance data not specified in verified sources.
