LT1076CQ#TRPBF - 2A Buck/Boost/Flyback Regulator | Analog Devices
MPN: LT1076CQ#TRPBF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.55 | $2,275.00 |
| 1,000 | $4.1 | $4,100.00 |
LT1076CQ#TRPBF Overview
A switching regulator is a voltage regulator that uses a series element that switches between on and off states to maintain a constant output voltage. Unlike linear regulators, switching regulators achieve high efficiency by storing energy in inductors and capacitors, making them ideal for applications where power dissipation and battery life are critical. The LT1076 belongs to the family of monolithic switching regulators, which integrate the control circuitry and power switch into a single IC, simplifying design and reducing component count.
Key features of the LT1076CQ#TRPBF include a 2A switch current rating, a wide input voltage range of 7.3V to 45V, and an adjustable output voltage from 2.5V to 50V. The device operates at a switching frequency of 100kHz, balancing efficiency and component size. It also includes an output monitor and current limit protection, enhancing reliability in demanding applications. The TO-263 package provides excellent thermal performance, with a low thermal resistance that supports continuous operation at high load currents.
Technically, the LT1076 uses a classic positive buck topology but includes design innovations that allow it to be configured as a positive-to-negative converter or a flyback converter. The internal oscillator and control circuitry are designed for stable operation across a wide range of input and output conditions. The device's bipolar process technology ensures robust performance and long-term reliability, making it a trusted choice for industrial and automotive power supplies.
Typical applications include distributed power systems, battery chargers, and point-of-load converters. The LT1076 is particularly well-suited for industrial control systems, telecom equipment, and automotive electronics where a rugged, high-efficiency switching regulator is required. Its ability to handle both step-down and step-up configurations adds versatility to power supply designs.
When designing with the LT1076CQ#TRPBF, ensure proper input and output capacitor selection to minimize ripple and maintain stability. The inductor value should be chosen based on the desired ripple current and switching frequency. Adequate PCB copper area is essential for thermal management, especially at high output currents.
Drop-in alternatives for LT1076CQ#TRPBF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LT1076CQ#TRPBF (same form factor and footprint) — differing in Function, Input Voltage Range, Output Current, Output Type, Output Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LT1076CQ#PBF
✅ Drop-In✓ In Stock
$4.45 / Unit
View Datasheet →LT1076CQ-5#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT1076CQ-5#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT1074CQ#PBF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LT1076CQ#TRPBF Maximum Ratings & Electrical Characteristics
| Function | Buck, Boost, Flyback |
| Output Type | Positive or Negative Adjustable |
| Output Voltage Range | 2.5V to 50V |
| Output Current | 2A (Switch) |
| Input Voltage Range | 7.3V to 45V |
| Switching Frequency | 100kHz |
| Number of Outputs | 1 |
| Package | TO-263-6 (D2PAK, 5 Leads + Tab) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | 0°C to 70°C |
| Synchronous Rectifier | No |
| Topology | Buck, Boost, Flyback |
| RoHS Status | Compliant |
| Lead Free | Yes |
| Factory Pack Quantity | 750 |
LT1076CQ#TRPBF Pin Configuration
| Pin 1 | VIN — Input supply voltage |
| Pin 2 | VSW — Switch output |
| Pin 3 | GND — Ground |
| Pin 4 | FB — Feedback input |
| Pin 5 | SHDN — Shutdown control |
| Pin 6 | TAB — Exposed pad (thermal and electrical ground) |
Typical Applications
LT1076CQ#TRPBF is suitable for 6 applications: Industrial Power Supplies, Telecom and Networking Equipment, Automotive Electronics, Battery Chargers, Distributed Power Systems, Test and Measurement Equipment.
Industrial Power Supplies
The LT1076CQ#TRPBF is ideal for industrial power supplies due to its wide input voltage range (7.3V to 45V) and ability to step down or step up voltages. Its 2A switch current can drive loads in control systems, motor drives, and factory automation. The device's rugged bipolar design ensures reliable operation in harsh environments, and its 100kHz switching frequency allows for compact magnetics, reducing overall solution size. With proper thermal management, it can deliver continuous power in 24V industrial bus systems.
Recommended
Telecom and Networking Equipment
In telecom and networking equipment, the LT1076CQ#TRPBF provides efficient power conversion from a 48V backplane to lower voltages for logic circuits. Its buck and flyback capabilities allow it to generate multiple output rails with minimal external components. The device's high efficiency reduces heat dissipation, which is critical in densely packed equipment racks. The adjustable output voltage enables precise regulation for sensitive communication ICs, and the integrated current limit protects against overloads.
Recommended
Automotive Electronics
The LT1076CQ#TRPBF is suitable for automotive electronics, such as infotainment systems and body control modules, where input voltage can vary from 9V to 16V (or higher during load dump). Its wide input range and robust design handle transients. The device can be configured as a buck converter to step down battery voltage to 5V or 3.3V for microcontrollers and sensors. The TO-263 package with exposed tab aids thermal dissipation in under-hood environments.
Recommended
Battery Chargers
The LT1076CQ#TRPBF can be used in battery charger circuits, providing constant current/constant voltage charging for lead-acid or lithium-ion batteries. Its adjustable output voltage allows precise setting of the charge voltage, while the current limit protects the battery from overcurrent. The device's high efficiency minimizes energy loss during charging, making it suitable for portable and stationary chargers. The flyback topology can provide isolation when required.
Recommended
Distributed Power Systems
In distributed power systems, the LT1076CQ#TRPBF serves as a point-of-load converter, stepping down a common bus voltage (e.g., 24V or 48V) to local logic levels. Its small footprint and high efficiency make it ideal for board-level power conversion. The device's ability to operate in buck or flyback mode allows flexible system architecture. The integrated current limit and thermal shutdown enhance system reliability.
Recommended
Test and Measurement Equipment
The LT1076CQ#TRPBF is used in test and measurement equipment to generate clean, stable supply rails for analog and digital circuits. Its low output ripple and adjustable voltage make it suitable for powering precision references and ADCs. The device's wide input range accommodates various bench supply voltages. The 100kHz switching frequency is low enough to minimize EMI, which is important in sensitive measurement environments.
Recommended
Recommended Products Summary
Engineering reference data for LT1076CQ#TRPBF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LT1076CQ#PBF | LT1076CQ-5#TRPBF | LT1074CQ#PBF |
|---|---|---|---|---|
| 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 Voltage | Adjustable 2.5V to 50V | Adjustable 2.5V to 50V | Fixed 5V | Adjustable 2.5V to 50V |
| Output Current | 2A (Switch) | 2A (Switch) | 2A (Switch) | 5A (Switch) |
| Input Voltage Range | 7.3V to 45V | 7.3V to 45V | 7.3V to 45V | 7.3V to 45V |
| Switching Frequency | 100kHz | 100kHz | 100kHz | 100kHz |
| Topology | Buck, Boost, Flyback | Buck, Boost, Flyback | Buck, Boost, Flyback | Buck, Boost, Flyback |
| RoHS | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Adjustable output voltage range (vs LT1076CQ-5#TRPBF)
- Higher switch current than LT1076CQ-5#TRPBF (vs LT1076CQ-5#TRPBF)
- Lower cost than LT1074CQ#PBF (vs LT1074CQ#PBF)
Design Notes
For optimal thermal performance, solder the exposed tab (pin 6) to a large copper area on the PCB. Use multiple vias to connect the tab to inner ground planes. Ensure adequate copper thickness (2 oz) for high current paths. Place input and output capacitors close to the IC to minimize parasitic inductance.
Select the inductor based on the desired ripple current. A typical value is 100µH for 2A output at 100kHz. Use a low-loss inductor with a saturation current rating above the peak switch current. The catch diode should be a Schottky type with a voltage rating at least 1.5 times the maximum input voltage.
Do not exceed the absolute maximum input voltage of 45V. Ensure the feedback resistor divider uses 1% tolerance resistors to maintain output accuracy. The shutdown pin (SHDN) should be pulled high for normal operation; if unused, tie it to VIN. Avoid running the device at high ambient temperatures without proper heatsinking.
Compliance Information
RoHS compliant per part number suffix 'PBF'. Not AEC-Q100 qualified. REACH and conflict minerals status not specified in available data.
