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Analog Devices Inc. LT1076CT#06PBF
- Part No.:
- LT1076CT#06PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1076CT#06PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,028
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Product details
Overview
LT1076CT#06PBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar step-down switching regulator in a 5-lead TO-220 package, featuring 100kHz fixed-frequency operation, 8.5mA quiescent current, programmable current limit (2.6A typical), and input voltage range of 8V to 60V. It implements a classic buck topology with analog multiplier-based feedback for improved line transient response and is used in industrial power supplies requiring stable 5V–24V outputs.
For engineers reviewing the LT1076CT#06PBF datasheet, LT1076CT#06PBF pinout, LT1076CT#06PBF application, or LT1076CT#06PBF equivalent, key selection considerations include its 2A integrated switch rating, 100kHz switching frequency, 2.21V internal reference, thermal resistance (θJA = 30°C/W), and compatibility with tapped-inductor and positive-to-negative converter topologies.
Technical Context
The LT1076CT#06PBF uses a true analog multiplier in the feedback loop, making loop gain independent of input voltage and enabling near-instantaneous response to VIN transients. Its Darlington NPN switch (single NPN variant vs. LT1074's Darlington) delivers 1.7V "on" voltage at 2A and supports output swing up to 40V below ground for inverting configurations.
It integrates pulse-by-pulse current limiting with 600ns detection time, frequency downshifting (100kHz → 20kHz) when FB drops below 1.3V for short-circuit control, and micropower shutdown (140µA) activated below 0.3V on the SHDN pin - though SHDN is absent in the 5-lead T package, limiting shutdown functionality to VC pin control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous; enables compact 5V/12V buck supplies without external MOSFETs. |
| Switching Frequency | 100kHz nominal; balances EMI, inductor size, and efficiency for mid-power DC/DC designs. |
| Input Voltage Range | 8V to 60V; supports wide-input industrial rails including 24V and 48V systems. |
| Reference Voltage | 2.21V ±1.5%; sets output via external resistor divider with high accuracy over temperature. |
| Quiescent Current | 8.5mA typical; minimizes no-load power loss in always-on applications. |
| Current Limit | 2.6A typical (ILIM open); adjustable downward with external resistor on ILIM pin in 7-pin variants - not available on this 5-pin T package. |
| Thermal Resistance | θJA = 30°C/W; requires minimal heatsinking for 2A loads at ambient ≤60°C. |
Pinout & Package
The LT1076CT#06PBF is housed in a 5-lead plastic TO-220 package (T package) with straight leads (flow code 06). The tab is electrically connected to GND and serves as the primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply and high-side switch source | Accepts 8–60V input; also powers internal bias circuitry; must be bypassed with low-ESR capacitor close to pin. |
| VSW | Switch collector output | Drives external inductor/diode; swings up to 40V below GND in inverting topologies; rated for 64V max VSW–VIN. |
| GND | Power and signal reference | Reference for internal 2.21V bandgap; must connect directly to output return to avoid load regulation error. |
| VC | Error amplifier output / compensation node | Controls duty cycle; connects to RC network for loop stability; clamped at 1.5V for 0% duty cycle. |
| FB/SENSE | Inverting input of error amplifier | Monitors output via resistor divider; 0.5µA bias current; sensitive to ripple (100mVp-p causes ~0.7% output shift). |
Key Features
| Feature | Design Value |
|---|---|
| Analog multiplier feedback | Eliminates input-voltage dependence in loop gain, improving line regulation and transient response without complex compensation. |
| Pulse-by-pulse current limiting | 600ns fault detection ensures robust short-circuit protection without external sensing components. |
| Frequency downshifting | Reduces switching frequency to 20kHz when FB < 1.3V, enabling stable current control during output shorts or very low VOUT. |
| Low quiescent current | 8.5mA operation enables use in battery-backed or energy-sensitive systems where standby loss matters. |
| Wide input voltage support | Operates from 8V to 60V, covering standard 12V, 24V, and 48V industrial bus voltages without pre-regulation. |
Applications
| Industrial DC/DC Power Supply | Automotive Subsystem Regulator |
|---|---|
Use Scenario: Converting 24V vehicle battery rail to regulated 5V for infotainment microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Primary buck regulator controlling duty cycle via FB feedback; provides isolated, low-noise 5V rail with fast line transient recovery. Use Value: 100kHz switching allows small magnetics; 60V abs max input withstands load-dump transients; analog multiplier ensures stable output during cranking (9V–16V input variation). | Use Scenario: Generating –12V from +24V for op-amp biasing in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Positive-to-negative inverting converter; VSW pin drives center-tapped inductor with GND-referenced output. Use Value: VSW swing to –40V below GND enables true negative output without extra charge pumps; 2A capability supports multi-channel analog front-ends. |
| Programmable Logic Controller (PLC) I/O Module | Factory Automation Sensor Hub |
Use Scenario: Providing 3.3V/2A auxiliary rail from 48V backplane in modular PLC chassis. IC Role / Device Role / Timing Role: Fixed-frequency buck controller regulating output via FB divider; VC pin used for loop compensation with RC network. Use Value: 30°C/W θJA allows convection cooling only; 8.5mA quiescent current reduces thermal load in densely packed modules. | Use Scenario: Powering multiple 5V analog sensors (RTDs, strain gauges) in a 24V-powered field transmitter. IC Role / Device Role / Timing Role: Main step-down regulator with tapped-inductor configuration to deliver 10A at 5V (using external winding). Use Value: Switch output rated for 40V below GND enables high-current tapped-buck topology; eliminates need for external high-current switch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3605EDE#PBF | 3A synchronous buck, 3MHz switching, 2.7–5.5V input, integrated MOSFETs; no HV capability. | Not suitable for >6V input; optimized for low-VIN portable apps, not industrial 24V/48V rails. | Select only for low-input, high-frequency, space-constrained designs where 60V tolerance is unnecessary. |
| LM2596T-5.0/NOPB | 3A buck, 150kHz, 4–40V input, fixed 5V output, no analog multiplier, higher quiescent current (5mA typical but no micropower mode). | Lacks line-transient performance and programmable features; limited to fixed-output use cases. | Choose for cost-sensitive, fixed-5V applications where dynamic performance and flexibility are secondary. |
Compared with LTC3605EDE#PBF and LM2596T-5.0/NOPB, the LT1076CT#06PBF uniquely combines 60V input tolerance, analog multiplier-based line regulation, and proven ruggedness in industrial environments - making it irreplaceable for wide-input, high-reliability buck conversion where transient immunity and topology flexibility matter.
Availability
LT1076CT#06PBF is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystems, and factory automation equipment requiring stable component supply, long-term lifecycle support, and compliance with RoHS and REACH standards.
Supply support for LT1076CT#06PBF 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, Inc. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LT1076CT#06PBF belongs to ADI's legacy Linear Technology switching regulator product line, designed specifically for robust, wide-input industrial DC/DC conversion where reliability, thermal performance, and topology versatility outweigh ultra-high efficiency or ultra-small footprint requirements.
FAQ
What is the maximum input voltage rating for the LT1076CT#06PBF?
The LT1076CT#06PBF has an absolute maximum input voltage rating of 60V. Its recommended operating input voltage range is 8V to 60V for buck-mode operation. Below 8V, startup may fail unless using inverting or boost configurations with self-boot capability down to 5V - however, the LT1076CT#06PBF is not characterized for reliable operation below 8V in standard buck mode per datasheet specifications.
Does the LT1076CT#06PBF support shutdown functionality?
No - the LT1076CT#06PBF in the 5-lead TO-220 (T) package does not include a dedicated SHDN pin. Shutdown must be implemented externally by pulling the VC pin low or disabling the input supply. Full micropower shutdown (140µA) is only available on 7-pin variants (e.g., LT1076CT7) with the SHDN pin. This limitation is inherent to the T-package pinout of the LT1076CT#06PBF.
Can the LT1076CT#06PBF be used in a positive-to-negative converter configuration?
Yes - the LT1076CT#06PBF supports positive-to-negative conversion because its VSW pin is rated to swing up to 40V below ground. When configured as an inverting buck-boost, it generates negative output voltages (e.g., –5V or –12V) from a positive input. This capability is explicitly validated in Linear Technology Application Note 44 and confirmed in the LT1076CT#06PBF's absolute maximum ratings and typical application circuits.
What is the typical current limit setting for the LT1076CT#06PBF?
The LT1076CT#06PBF has a factory-set current limit of 2.6A (typical) when the ILIM pin is left open. This value is fixed for the 5-pin T package - unlike 7-pin versions, it does not support external adjustment of current limit via an ILIM resistor. The device will enter pulse-by-pulse current limiting if switch current exceeds this threshold, with 600ns fault detection and automatic recovery.
Is the LT1076CT#06PBF RoHS compliant and lead-free?
Yes - the "#06PBF" suffix in LT1076CT#06PBF explicitly denotes a lead-free, RoHS-compliant packaging variant. The "PBF" stands for Pb-Free, and the part meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) requirements. It is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards and carries full RoHS 2 (2011/65/EU) and REACH compliance documentation from Analog Devices.
LT1076CT#06PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-5 Flow 6
LT1076CT#06PBF FAQ
1.How can I place an order for LT1076CT#06PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076CT#06PBF 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 LT1076CT#06PBF reliable?
The price and inventory of LT1076CT#06PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076CT#06PBF is usually 5 days.
3.What payment methods are accepted for LT1076CT#06PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076CT#06PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076CT#06PBF?
LT1076CT#06PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076CT#06PBF 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 LT1076CT#06PBF?
For technical support, including LT1076CT#06PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076CT#06PBF requirements.
6.How does Aetrix verify that LT1076CT#06PBF is sourced from the original manufacturer or authorized distributors?
All LT1076CT#06PBF 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 LT1076CT#06PBF meets industry standards.
7.What is the process for return or replacement of LT1076CT#06PBF?
All LT1076CT#06PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076CT#06PBF, 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 LT1076CT#06PBF part is unused and in its original packaging.
Return procedure for LT1076CT#06PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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