LT1076CQ#PBF - 2A Buck/Boost/Flyback Regulator | Analog Devices
MPN： LT1076CQ#PBF ✓ 啟用中LT1076CQ#PBF 概覽
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.
直接替換替代品，適用於 LT1076CQ#PBF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LT1076CQ#PBF （相同外形與佔位） — 差異在於 Function, Output Type, Package, RoHS Status, Switching Frequency.
LT1076CQ-5#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LT1074CQ#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LT1076CQ#TR
✅ 直接替換📋 參考替代品（不在目錄中）
LT1076CQ#PBF 最大額定值與電氣特性
| 功能 | Step-Down (Buck), Step-Up (Boost), Inverting, Flyback |
| 輸出類型 | Adjustable |
| 輸出電壓範圍 | 2.5 V to 50 V |
| Output Current | 2 A (Switch) |
| 輸入電壓範圍 | Up to 60 V |
| 切換頻率 | 100 kHz |
| PWM Type | Current Mode |
| 同步整流器 | No |
| 輸出數量 | 1 |
| 封裝 | TO-263-6 (D2PAK, 5 Leads + Tab) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Lead Free | Yes |
LT1076CQ#PBF 腳位配置
| 腳位 1 | VSW — Switch output |
| 腳位 2 | VIN — Input supply |
| 腳位 3 | GND — Ground |
| 腳位 4 | FB — Feedback |
| 腳位 5 | SHDN — Shutdown |
| 腳位 TAB | GND — Ground (thermal pad) |
典型應用
LT1076CQ#PBF 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 LT1076CQ#PBF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Higher switch current than LT1076CQ-5#PBF (對比LT1076CQ-5#PBF)
- Lower switch current than LT1074CQ#PBF (對比LT1074CQ#PBF)
- Lead-free and RoHS compliant (對比LT1076CQ#TR)
設計說明
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.
合規資訊
RoHS compliant and lead-free per #PBF suffix. Other compliance data not specified in verified sources.
