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Analog Devices Inc. LT1076CQ#TRPBF
- Part No.:
- LT1076CQ#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LT1076CQ#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A DDPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,180
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Product details
Overview
LT1076CQ#TRPBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar buck switching regulator in a 5-lead plastic DD package, operating from 8V to 60V input, delivering adjustable output from 2.5V to 50V at 100kHz fixed frequency with 8.5mA quiescent current and programmable current limit. It enables compact, high-efficiency step-down conversion in industrial power supplies and embedded DC/DC modules.
For engineers reviewing the LT1076CQ#TRPBF datasheet, LT1076CQ#TRPBF pinout, LT1076CQ#TRPBF application, or LT1076CQ#TRPBF equivalent, key selection criteria include its 2A integrated switch, 100kHz switching frequency, 2.6A factory-set current limit, -40°C to 85°C industrial temperature range, and compatibility with tapped-inductor and inverting topologies.
Technical Context
The LT1076CQ#TRPBF implements a classic buck topology with an internal Darlington NPN switch and true analog multiplier in the feedback loop, enabling near-instantaneous line transient response and input-voltage-independent loop gain. Its switch output swings 35V below ground, supporting positive-to-negative and negative-boost configurations.
It features pulse-by-pulse current limiting with 600ns detection time, frequency downshifting below 1.3V FB voltage (to 20kHz), and micropower shutdown mode drawing only 140–300µA. The ILIM pin allows external adjustment of current limit down to zero in 7-pin variants-but the 5-pin Q package fixes limit at 2.6A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous - defines maximum load capability without external boost or tapped-inductor configuration |
| Input Voltage Range | 8V to 60V - supports wide-input industrial and automotive battery-derived rails |
| Switching Frequency | 100kHz ±10% - enables use of standard low-cost magnetics and balances efficiency vs. EMI |
| Quiescent Current | 8.5mA - minimizes no-load power loss in always-on systems |
| Current Limit | 2.6A typical - factory-trimmed for robust short-circuit protection without external components |
| Reference Voltage | 2.21V ±1.5% - sets output voltage accuracy via external resistor divider on FB pin |
| Operating Temp | -40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
LT1076CQ#TRPBF is housed in a 5-lead plastic DD (Q) package with exposed thermal pad, optimized for surface-mount assembly and thermal performance (θJA = 30°C/W). Pin 1 is VIN, Pin 2 is VSW, Pin 3 is GND, Pin 4 is VC, Pin 5 is FB/SENSE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply and high-side switch source | Carries full input current; must be bypassed with low-ESR capacitor close to pin |
| VSW | Switch collector output | Swings up to 35V below ground-enables inverting and tapped-inductor topologies |
| GND | Analog and power ground reference | Internal 2.21V reference tied here; must connect directly to low-current output return path |
| VC | Error amplifier output / compensation node | Drives external RC network for loop stability; asymmetrical ±140µA/1.1mA drive |
| FB/SENSE | Inverting input of error amplifier | Monitors output via resistor divider; triggers frequency downshift below 1.3V |
Key Features
| Feature | Design Value |
|---|---|
| True analog multiplier feedback | Eliminates input-voltage dependence in loop gain-ensures consistent transient response across 8–60V input range |
| Pulse-by-pulse current limiting | 600ns overcurrent detection and shutdown-prevents switch failure during sustained shorts |
| Frequency downshifting | Linear reduction from 100kHz to 20kHz as FB drops from 1.3V to 0.5V-maintains control at ultra-low duty cycles |
| Micropower shutdown | 140–300µA supply current in shutdown-enables low-power standby modes without external regulators |
| Ground-referenced switch swing | 35V below GND capability-supports non-isolated inverting and negative-boost converters without level-shifting |
Applications
| Industrial DC/DC Power Supply | Embedded Microcontroller Power Rail |
|---|---|
Use Scenario: Converting 24V factory bus to 5V/3.3V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated, ripple-controlled output with fast line/load transients. Use Value: 8.5mA quiescent current extends system uptime in low-power sleep states; 100kHz operation simplifies EMI filtering. | Use Scenario: Generating stable 3.3V from 12V automotive battery for MCU, CAN transceiver, and ADC subsystems. IC Role / Device Role / Timing Role: High-reliability step-down converter with built-in current limiting and thermal robustness. Use Value: -40°C to +85°C rating ensures operation across vehicle cabin temperatures; 2.6A limit protects against ESD-induced latch-up. |
| Tapped-Inductor Buck Converter | Positive-to-Negative Inverter |
Use Scenario: Delivering 10A at 5V from 24V input using a center-tapped inductor in high-current industrial actuators. IC Role / Device Role / Timing Role: Controller driving tapped-inductor topology with VSW pin swinging below ground. Use Value: 35V negative swing capability enables direct drive of tapped winding-no external gate driver needed. | Use Scenario: Generating -5V rail from +12V for op-amp biasing and analog signal conditioning in test equipment. IC Role / Device Role / Timing Role: Inverting buck-boost controller leveraging VSW's ability to go 35V below GND. Use Value: Eliminates need for isolated DC/DC or charge-pump IC-reduces BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3632EMSE#TRPBF | 42V max input, 2A synchronous buck, 3.5mA IQ, 500kHz switching, MSOP-10 package | Higher efficiency, lower noise, but requires external MOSFETs and more complex compensation | Select for higher efficiency and smaller solution size where board space is constrained and 500kHz EMI is manageable |
| LM2678SX-5.0/NOPB | 40V max input, 5A buck, fixed 5V output, TO-263-5 package, 50kHz switching, 50mA IQ | Fixed-output, higher current, higher quiescent current, no FB adjustability or inverting capability | Select when 5V fixed output suffices and higher current headroom is required without topology flexibility |
Compared with LTC3632EMSE#TRPBF, LT1076CQ#TRPBF offers proven bipolar robustness and inverting topology support at lower cost and simpler design; compared with LM2678SX-5.0/NOPB, it provides adjustable output and superior light-load efficiency but lower peak current capability.
Availability
LT1076CQ#TRPBF is available at Aetrix Electronics and suitable for industrial automation, embedded microcontroller power, and analog signal chain power applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LT1076CQ#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its legacy of high-performance analog and power management ICs with rigorous qualification and long-term product support.
The LT1076CQ#TRPBF belongs to Linear's monolithic switching regulator family designed for rugged, topology-flexible DC/DC conversion in industrial, telecom, and instrumentation systems where reliability and design simplicity are critical.
FAQ
What is the maximum input voltage rating for LT1076CQ#TRPBF?
The LT1076CQ#TRPBF has an absolute maximum input voltage rating of 45V. Its recommended operating input voltage range is 8V to 60V for buck-mode operation, with self-boot capability enabling startup down to 5V in inverting or boost configurations. Exceeding 45V risks permanent damage per Absolute Maximum Ratings.
Does LT1076CQ#TRPBF support adjustable output voltage?
Yes, LT1076CQ#TRPBF supports fully adjustable output voltage from 2.5V to 50V using an external resistor divider on the FB pin. The internal 2.21V reference sets regulation point: VOUT = 2.21V × (1 + R1/R2). This enables precise tailoring for diverse system rails without requiring multiple fixed-output variants.
Can LT1076CQ#TRPBF be used in a negative-output configuration?
Yes, LT1076CQ#TRPBF can configure as a positive-to-negative inverter because its VSW pin is rated to swing 35V below ground. When wired in inverting buck-boost topology, it generates regulated negative outputs-e.g., -5V from +12V-without isolation or additional level-shifting circuitry.
What is the thermal resistance of LT1076CQ#TRPBF in its Q package?
The LT1076CQ#TRPBF in the 5-lead plastic DD (Q) package has θJA = 30°C/W and θJC = 4.0°C/W. These values assume standard PCB layout with 0.5 in² of 1 oz. copper connected to the exposed thermal pad. Actual junction temperature must stay ≤125°C under worst-case load and ambient conditions.
Is current limit programmable on LT1076CQ#TRPBF?
No-LT1076CQ#TRPBF uses the 5-pin Q package, which lacks the ILIM pin. Its current limit is factory-set at 2.6A (typical) and not externally adjustable. For programmable current limit, select the 7-pin T7 or R package variants (e.g., LT1076CT7#TRPBF), which expose the ILIM pin for resistor-based scaling.
LT1076CQ#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost, Flyback
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 8V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 35V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DDPAK-5
LT1076CQ#TRPBF FAQ
1.How can I place an order for LT1076CQ#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076CQ#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT1076CQ#TRPBF reliable?
The price and inventory of LT1076CQ#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076CQ#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1076CQ#TRPBF?
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4.How is shipping managed for LT1076CQ#TRPBF?
LT1076CQ#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076CQ#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT1076CQ#TRPBF?
For technical support, including LT1076CQ#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076CQ#TRPBF requirements.
6.How does Aetrix verify that LT1076CQ#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1076CQ#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT1076CQ#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1076CQ#TRPBF?
All LT1076CQ#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076CQ#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT1076CQ#TRPBF part is unused and in its original packaging.
Return procedure for LT1076CQ#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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