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Analog Devices Inc. LT1076HVCT-5#PBF
- Part No.:
- LT1076HVCT-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1076HVCT-5#PBF.pdf
- Description:
- IC REG BUCK BOOST 5V 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,779
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Product details
Overview
LT1076HVCT-5#PBF from Analog Devices (formerly Linear Technology) is a high-voltage 2A fixed 5V monolithic bipolar buck switching regulator with integrated 2.6A switch, 100kHz switching frequency, and 8V–60V input range-designed for industrial power supplies requiring robust operation under wide-input conditions.
For engineers reviewing the LT1076HVCT-5#PBF datasheet, LT1076HVCT-5#PBF pinout, LT1076HVCT-5#PBF application, or LT1076HVCT-5#PBF equivalent, key selection considerations include its HV-rated switch (−45V VSW to GND), true analog multiplier feedback loop, on-chip pulse-by-pulse current limiting, and compatibility with tapped-inductor 4A buck configurations.
Technical Context
The LT1076HVCT-5#PBF implements a classic positive buck topology enhanced by a true analog multiplier in the feedback path, enabling near-instantaneous response to input voltage transients and input-independent loop gain. Its internal oscillator is pre-set to 100kHz with ±10kHz tolerance over temperature.
It supports multiple topologies beyond standard buck: positive-to-negative conversion, negative boost, and flyback-enabled by the switch's ability to swing 45V below ground (VSW to GND) and withstand 75V relative to VIN. The device features a dedicated shutdown pin (VTHRESHOLD = 2.45V) and operates across −40°C to 85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±2% over full temperature/load/input range-enables stable logic supply without external resistor divider. |
| Switch Current Limit | 2.6A typical (ILIM open)-provides robust short-circuit protection without external sensing resistors. |
| Input Voltage Range | 8V to 60V (buck mode); down to 5V in inverting/boost modes via self-boot-supports wide-range industrial DC inputs. |
| Switching Frequency | 100kHz nominal (90–110kHz over temp)-balances EMI, efficiency, and inductor size for cost-sensitive designs. |
| Quiescent Current | 9.0mA max at VIN ≤ 40V-minimizes no-load power loss in always-on systems. |
| VSW to GND Rating | −45V (HV version)-allows direct drive of tapped inductors for 4A output in buck configuration. |
| Thermal Resistance | θJA = 50°C/W (TO-220 T7 package)-enables 2A continuous operation with minimal heatsinking. |
Pinout & Package
LT1076HVCT-5#PBF is housed in a 7-lead plastic TO-220 (T7) package with exposed tab electrically connected to GND for thermal and electrical grounding. Pin 1 is VIN; pin 2 is GND; pin 3 is SENSE; pin 4 is ILIM; pin 5 is VC; pin 6 is VSW; pin 7 is SHDN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main input power rail | Accepts 8–60V DC; powers internal circuitry and switch driver; requires ≥8V post-startup for regulation. |
| GND (Pin 2) | Power and signal reference | Common return for all internal circuits; tab is internally bonded to this pin for thermal conduction. |
| SENSE (Pin 3) | Feedback input | Monitors regulated output via resistor divider; 5V threshold triggers zero-duty-cycle shutdown if exceeded. |
| ILIM (Pin 4) | Current limit programming | Open-circuit sets 2.6A limit; optional resistor reduces limit to 1.2A or 1.8A per datasheet equation. |
| VC (Pin 5) | Error amplifier output | Drives external compensation network; clamps low at 1.5V during overload to force duty cycle to zero. |
| VSW (Pin 6) | Switch collector output | Connects to inductor/diode node; rated −45V to GND-enables tapped-inductor 4A buck and inverting topologies. |
| SHDN (Pin 7) | Enable/disable control | Logic-level input: <0.3V disables regulator; >2.45V enables; draws only 10μA when active. |
Key Features
| Feature | Design Value |
|---|---|
| True analog multiplier feedback | Eliminates input-voltage-dependent loop gain variation-ensures consistent transient response across 8–60V input range. |
| Pulse-by-pulse current limiting | Prevents switch destruction during output shorts or overloads-no external current-sense resistor required. |
| Multi-topology capability | Supports buck, positive-to-negative, negative boost, and flyback-reduces BOM count across diverse power architectures. |
| Self-boot startup | Enables operation from as low as 5V input in non-buck configurations-extends usability in low-VIN auxiliary rails. |
| HV switch rating | VSW = −45V to GND and 75V to VIN-permits use with high-ratio tapped inductors for 4A 5V outputs. |
Applications
| Industrial 24V/48V DC-DC Conversion | Programmable Logic Controller (PLC) Power Supply |
|---|---|
Use Scenario: Converting unregulated 24V or 48V field bus power to clean 5V for microcontrollers and I/O drivers in harsh factory environments. IC Role / Device Role / Timing Role: Primary buck regulator delivering 2A continuous 5V output with built-in current limiting and thermal robustness. Use Value: Eliminates need for external current-sense components and compensates for input ripple up to 60V-reducing design complexity and bill-of-materials cost. | Use Scenario: Generating isolated 5V logic supply from 24V backplane in modular PLC chassis with space-constrained PCB layout. IC Role / Device Role / Timing Role: Fixed-output step-down controller driving tapped-inductor topology to achieve 4A 5V output from single LT1076HVCT-5#PBF. Use Value: Leverages −45V VSW rating to enable high-current buck without secondary switch-saving board area and component count. |
| Positive-to-Negative Voltage Converter | Test Equipment Auxiliary Rail Generator |
Use Scenario: Deriving −5V from +24V supply for op-amp biasing or sensor excitation in portable test instruments. IC Role / Device Role / Timing Role: Inverting converter core using LT1076HVCT-5#PBF in positive-to-negative configuration with external diode and capacitor. Use Value: Uses same IC and layout as buck design-reducing qualification effort and inventory SKUs while supporting dual-polarity rails. | Use Scenario: Providing stable 5V auxiliary power for digital control circuitry in benchtop power analyzers operating from 36V DC input. IC Role / Device Role / Timing Role: High-reliability buck regulator with shutdown control (SHDN pin) enabling remote power sequencing and low-power standby modes. Use Value: 10μA shutdown current and 9mA quiescent current minimize standby losses-extending battery life or reducing heat in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1076CT7-5 | Same die, standard voltage rating (VSW = −35V to GND; max VIN = 45V) | Limited to ≤45V input and ≤3.5A tapped-inductor output-unsuitable for 60V industrial buses or 4A loads. | Select LT1076CT7-5 only when input stays ≤45V and peak current ≤3.5A; otherwise LT1076HVCT-5#PBF is required. |
| LT3430EFE#PBF | Higher frequency (200kHz), lower IQ (2.5mA), adjustable output (1.2V–VIN), TSSOP-16 package | Requires external feedback resistors and compensation; lacks integrated 5V reference and multi-topology flexibility. | Choose LT3430EFE#PBF for compact, low-quiescent designs needing adjustable output; retain LT1076HVCT-5#PBF for drop-in 5V, high-voltage, multi-topology simplicity. |
Compared with LT1076CT7-5 and LT3430EFE#PBF, the LT1076HVCT-5#PBF uniquely combines fixed 5V output, 60V input support, −45V switch rating, and native multi-topology capability-making it optimal for ruggedized 5V power where layout reuse and topology flexibility are critical.
Availability
LT1076HVCT-5#PBF is available at Aetrix Electronics and suitable for industrial automation, programmable logic controllers, and test equipment requiring stable component supply with long lifecycle assurance and lead-free compliance.
Supply support for LT1076HVCT-5#PBF 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 precision analog and power management portfolio with full datasheet, simulation model, and application note support.
The LT1076HVCT-5#PBF belongs to Linear's monolithic bipolar switching regulator family, designed specifically for high-reliability industrial and instrumentation power conversion where simplicity, ruggedness, and topology versatility outweigh ultra-high efficiency or miniaturization.
FAQ
What is the maximum input voltage supported by the LT1076HVCT-5#PBF in buck configuration?
The LT1076HVCT-5#PBF supports an input voltage range of 8V to 60V in standard buck mode. This 60V maximum is explicitly specified for the HV variant and distinguishes it from the standard LT1076CT7-5 (45V max). Operation below 8V is possible only in inverting or boost configurations using the self-boot feature, where minimum input drops to 5V.
Can the LT1076HVCT-5#PBF be used to generate 4A output at 5V?
Yes-the LT1076HVCT-5#PBF can deliver up to 4A at 5V when configured in a tapped-inductor buck topology. This relies on its −45V VSW rating (relative to GND), which allows safe switching across the center-tapped inductor. Standard buck operation is rated for 2A continuous; the 4A capability is a validated design option documented in Linear's application notes and schematics.
Does the LT1076HVCT-5#PBF require an external current-sense resistor?
No-the LT1076HVCT-5#PBF integrates pulse-by-pulse current limiting without any external sense resistor. The current limit is set internally at 2.6A (ILIM pin open) or adjusted downward using a resistor on the ILIM pin per the formula ILIM ≈ 1.5 / RLIM (kΩ). This eliminates component count and layout sensitivity associated with discrete current sensing.
What is the function of the VC pin on the LT1076HVCT-5#PBF?
The VC pin on the LT1076HVCT-5#PBF is the error amplifier output, used to connect external compensation components (typically a series RC network from VC to SENSE). It sources/sinks up to 1.6mA and clamps at 1.5V during overload to force zero duty cycle-acting as both a control interface and fault indicator. Its voltage directly modulates the switch duty cycle in closed-loop regulation.
Is the LT1076HVCT-5#PBF RoHS-compliant and lead-free?
Yes-the "#PBF" suffix in LT1076HVCT-5#PBF explicitly denotes lead-free (Pb-free) packaging compliant with RoHS Directive 2011/65/EU. The device uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for TO-220 packages. Full compliance documentation is available through Analog Devices' quality portal.
LT1076HVCT-5#PBF 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 8V
- Voltage - Input (Max):
- 64V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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
LT1076HVCT-5#PBF FAQ
1.How can I place an order for LT1076HVCT-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076HVCT-5#PBF 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 LT1076HVCT-5#PBF reliable?
The price and inventory of LT1076HVCT-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076HVCT-5#PBF is usually 5 days.
3.What payment methods are accepted for LT1076HVCT-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076HVCT-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076HVCT-5#PBF?
LT1076HVCT-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076HVCT-5#PBF 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 LT1076HVCT-5#PBF?
For technical support, including LT1076HVCT-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076HVCT-5#PBF requirements.
6.How does Aetrix verify that LT1076HVCT-5#PBF is sourced from the original manufacturer or authorized distributors?
All LT1076HVCT-5#PBF 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 LT1076HVCT-5#PBF meets industry standards.
7.What is the process for return or replacement of LT1076HVCT-5#PBF?
All LT1076HVCT-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076HVCT-5#PBF, 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 LT1076HVCT-5#PBF part is unused and in its original packaging.
Return procedure for LT1076HVCT-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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