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Analog Devices Inc. LT1076HVIT#06PBF
- Part No.:
- LT1076HVIT#06PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1076HVIT#06PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,065
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Product details
Overview
LT1076HVIT#06PBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar step-down switching regulator in a 7-lead TO-220 package with integrated power switch, oscillator, and current-limit circuitry. It supports input voltages up to 64V, delivers adjustable output from 2.5V to 50V, operates at 100kHz, and features programmable current limit (2.6A typical), micropower shutdown (140µA), and true analog multiplier feedback for improved line transient response.
For engineers reviewing the LT1076HVIT#06PBF datasheet, LT1076HVIT#06PBF pinout, LT1076HVIT#06PBF application, or LT1076HVIT#06PBF equivalent, key selection considerations include high-voltage input capability (64V max), negative-output converter topology support, tapped-inductor buck operation, thermal performance (θJA = 35°C/W), and ILIM pin programmability for custom current limiting.
Technical Context
The LT1076HVIT#06PBF implements a classic buck topology enhanced with an 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 (vs. single NPN in standard LT1076) enables 45V negative swing below ground, supporting positive-to-negative and negative-boost configurations.
It integrates pulse-by-pulse current limiting via the ILIM pin (internally clamped at 4.5V for 2.6A default), frequency shifting below 1.3V FB voltage (20–100kHz range), and dual-mode shutdown: duty-cycle disable above 2.35V and full micropower state below 0.3V. The 7-pin T7 package provides dedicated SHDN, ILIM, and FB pins for flexible system control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8V to 64V - supports wide industrial and automotive battery-supplied systems without external pre-regulation. |
| Switch Current Limit | 2.6A typical (ILIM open) - sets maximum peak switch current; adjustable down to zero via external resistor on ILIM pin. |
| Switching Frequency | 100kHz nominal (85–120kHz over temp) - balances efficiency, EMI, and external component size for compact designs. |
| Quiescent Supply Current | 8.5mA typical - enables low-noise operation in always-on systems; drops to 140µA in micropower shutdown. |
| Reference Voltage | 2.21V ±1.5% - precision internal bandgap reference used for output voltage setting via external resistor divider. |
| Thermal Resistance θJA | 35°C/W - measured with 0.5 in² 1 oz copper pad; enables 2A continuous operation at +85°C ambient with minimal heatsinking. |
| Output Voltage Range | 2.5V to 50V - set externally via FB pin divider; supports both standard buck and non-inverting topologies. |
Pinout & Package
LT1076HVIT#06PBF is housed in a 7-lead plastic TO-220 (T7) package with tab connected to GND. Leads are formed straight (flow 06), optimized for through-hole mounting and thermal conduction to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power Input / Switch Source | Supplies internal bias circuitry and serves as high-current switch source terminal; must be bypassed with low-ESR capacitor close to pin. |
| 2 - VSW | Switch Output | Drives external inductor/diode; swings up to 45V below GND - enables negative-output and tapped-inductor configurations. |
| 3 - GND | Signal & Power Reference | Reference for internal 2.21V bandgap and error amplifier; must connect directly to low-current output return path to avoid load regulation error. |
| 4 - FB/SENSE | Error Amplifier Inverting Input | Compares divided output voltage against 2.21V reference; also controls frequency shift when voltage drops below 1.3V. |
| 5 - ILIM | Current Limit Programming | Internally biased at 4.5V (2.6A limit); external resistor to GND scales limit linearly - enables foldback or soft-start via capacitor. |
| 6 - VC | Control Voltage Output | Provides error amplifier output for external compensation (RC network to GND); clamped at 1.5V min and 5.8V max. |
| 7 - SHDN | Shutdown Control | Logic-level enable: >2.35V disables switching (duty cycle = 0); <0.3V enters micropower shutdown (140µA IQ). |
Key Features
| Feature | Design Value |
|---|---|
| Analog multiplier feedback loop | Eliminates input-voltage dependence in loop gain - improves line transient response by >3× vs. conventional PWM controllers. |
| Programmable current limit via ILIM pin | Enables precise overcurrent protection tuning from 0A to 3.2A - avoids derating and supports custom short-circuit behavior. |
| Frequency shifting below 1.3V FB | Reduces switching frequency to 20kHz during overload - maintains stable current limiting even at near-zero output voltage. |
| 45V negative switch swing capability | Supports direct positive-to-negative conversion without level-shifting circuitry - simplifies inverting supply design. |
| Micropower shutdown mode | Reduces total supply current to 140µA - suitable for battery-backed systems requiring ultra-low standby power. |
Applications
| Industrial 24V DC-DC Conversion | Automotive Load Dump Protection |
|---|---|
Use Scenario: Converting 24V vehicle battery or factory bus to regulated 5V/3.3V for PLC I/O modules under wide temperature and load variation. IC Role / Device Role / Timing Role: Primary buck controller managing high-side switch, current sensing, and feedback regulation - no external gate driver or sense resistor required. Use Value: 64V absolute max input withstands 12V/24V load dump transients per ISO 7637-2; 35°C/W θJA allows full 2A output at +85°C ambient without heatsink. | Use Scenario: Generating isolated –5V rail from 12V automotive supply to power op-amps and sensors in ADAS camera modules. IC Role / Device Role / Timing Role: Positive-to-negative converter using tapped-inductor topology - leverages VSW's 45V negative swing to eliminate charge pump or transformer. Use Value: Eliminates isolation components and reduces BOM count by 40%; achieves >85% efficiency at 1A output with MBR745 Schottky diode. |
| High-Voltage Telecom Power | Programmable Lab Power Supply |
Use Scenario: Intermediate 48V-to-12V conversion in telecom shelf power distribution, operating continuously at +70°C ambient. IC Role / Device Role / Timing Role: Fixed-frequency (100kHz) buck regulator with analog multiplier control - ensures stable regulation despite 48V input ripple and dynamic load steps. Use Value: True analog multiplier feedback delivers <50µs line transient recovery - meets GR-63-CORE reliability requirements for telecom infrastructure. | Use Scenario: Adjustable bench supply delivering 3–30V at up to 2A, with current limiting and remote shutdown via microcontroller GPIO. IC Role / Device Role / Timing Role: Programmable voltage/current source core - ILIM and SHDN pins accept DAC outputs or digital logic for closed-loop control. Use Value: ILIM pin enables precise 0–2A current limit programming with <±10% error; SHDN pin supports 0.3V logic-compatible enable/disable sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3632EMSE#PBF | Monolithic 2A synchronous buck; 4–60V input; 3mm × 4mm MSOP; 92% peak efficiency; no ILIM pin. | Requires external compensation; lacks negative-output capability and analog multiplier line regulation. | Preferred for space-constrained, high-efficiency DC-DC where footprint and thermal density outweigh topology flexibility. |
| LM5088MHX/NOPB | 2.5A external-FET controller; 4.5–65V input; 100kHz fixed freq; current-mode control; no integrated switch. | Needs external MOSFET and sense resistor; supports higher current but adds complexity and layout sensitivity. | Chosen when >2A output, higher efficiency at light loads, or custom FET selection (e.g., SiC) is required. |
Compared with LTC3632EMSE#PBF and LM5088MHX/NOPB, LT1076HVIT#06PBF uniquely combines high-voltage tolerance (64V), negative-output topology support, analog multiplier feedback, and programmable current limiting in a single monolithic IC - making it optimal for ruggedized, multi-topology industrial power designs where simplicity and transient robustness are critical.
Availability
LT1076HVIT#06PBF is available at Aetrix Electronics and suitable for industrial automation, automotive subsystems, and telecom power applications requiring stable component supply, extended temperature operation (–40°C to +85°C), and high-input-voltage resilience.
Supply support for LT1076HVIT#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 acquired Linear Technology in 2017 and maintains its legacy high-performance analog and power management product lines.
The LT1076HV series belongs to Linear's monolithic switching regulator family, designed specifically for rugged industrial and automotive power conversion where high input voltage, topology flexibility (buck/inverting), and robust transient response are essential.
FAQ
What is the maximum input voltage rating for LT1076HVIT#06PBF?
The LT1076HVIT#06PBF has an absolute maximum input voltage rating of 64V, confirmed in the Absolute Maximum Ratings table. This distinguishes it from the standard LT1076 (45V max) and enables use in 48V telecom, 36V industrial, and load-dump-prone automotive systems without external clamping.
Can LT1076HVIT#06PBF be used in a positive-to-negative converter configuration?
Yes, LT1076HVIT#06PBF supports positive-to-negative conversion due to its VSW pin's ability to swing 45V below GND. This is explicitly validated in the Typical Applications section (Figure TA03) and enabled by its Darlington NPN switch architecture - no external level-shifting circuitry is needed.
How is current limit programmed on LT1076HVIT#06PBF?
Current limit on LT1076HVIT#06PBF is set via the ILIM pin: when left open, it self-clamps at ~4.5V for a 2.6A default limit. Connecting an external resistor RLIM from ILIM to GND scales the limit linearly - for LT1076HV, RLIM = ILIM × 5.5kΩ + 1kΩ, enabling precise adjustment from 0A to 3.2A.
What is the thermal resistance θJA for LT1076HVIT#06PBF in its T7 package?
The LT1076HVIT#06PBF in the 7-lead TO-220 (T7) package has a specified θJA of 35°C/W, measured with 0.5 in² of 1 oz copper on the PCB. This value is documented in the Absolute Maximum Ratings table and enables full 2A output at +85°C ambient with standard board layout.
Does LT1076HVIT#06PBF include frequency shifting, and how does it work?
Yes, LT1076HVIT#06PBF implements frequency shifting: when the FB pin voltage drops below 1.3V (indicating low or shorted output), the internal oscillator reduces frequency from 100kHz down to ~20kHz. This ensures minimum on-time remains sufficient for stable current limiting - a feature confirmed in the Block Diagram and Typical Performance Characteristics.
LT1076HVIT#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):
- 64V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 35V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5 Flow 6
LT1076HVIT#06PBF FAQ
1.How can I place an order for LT1076HVIT#06PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076HVIT#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 LT1076HVIT#06PBF reliable?
The price and inventory of LT1076HVIT#06PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076HVIT#06PBF is usually 5 days.
3.What payment methods are accepted for LT1076HVIT#06PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076HVIT#06PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076HVIT#06PBF?
LT1076HVIT#06PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076HVIT#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 LT1076HVIT#06PBF?
For technical support, including LT1076HVIT#06PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076HVIT#06PBF requirements.
6.How does Aetrix verify that LT1076HVIT#06PBF is sourced from the original manufacturer or authorized distributors?
All LT1076HVIT#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 LT1076HVIT#06PBF meets industry standards.
7.What is the process for return or replacement of LT1076HVIT#06PBF?
All LT1076HVIT#06PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076HVIT#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 LT1076HVIT#06PBF part is unused and in its original packaging.
Return procedure for LT1076HVIT#06PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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