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Analog Devices Inc. LT1076HVCT#PBF
- Part No.:
- LT1076HVCT#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1076HVCT#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
LT1076HVCT#PBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar step-down switching regulator in TO-220-5 package, operating from 8V to 60V input, delivering adjustable 2.5V–50V output with 100kHz fixed-frequency PWM control and programmable current limit of 2.6A. It supports buck, positive-to-negative, and negative-boost topologies in industrial power supplies.
For engineers reviewing the LT1076HVCT#PBF datasheet, LT1076HVCT#PBF pinout, LT1076HVCT#PBF application, or LT1076HVCT#PBF equivalent, key selection considerations include its HV-rated 64V input max, 45V switch-to-ground swing, 8.5mA quiescent current, analog multiplier-based feedback for line transient immunity, and compatibility with tapped-inductor configurations up to 10A at 5V.
Technical Context
The LT1076HVCT#PBF implements a classic buck topology enhanced with a true analog multiplier in the feedback loop-multiplying error amplifier output by 1/VIN-ensuring loop gain independence from input voltage and near-instantaneous response to line transients. Its Darlington NPN switch (single NPN for LT1076 variant) enables 45V negative swing below ground, enabling tapped-inductor and inverting configurations.
On-chip pulse-by-pulse current limiting uses an internal 320µA current source on the ILIM pin to set 2.6A default limit; external resistor adjustment is not supported in the 5-pin TO-220 (T) package. Frequency shifting below 1.3V FB voltage reduces switching frequency to 20kHz under short-circuit conditions to maintain control at sub-microsecond duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8V to 60V - supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| Output Voltage Range | 2.5V to 50V - adjustable via external resistor divider; reference voltage trimmed to 2.21V ±1.5%. |
| Switch Current Limit | 2.6A typical - fixed internal limit; provides robust short-circuit protection without external components. |
| Switching Frequency | 100kHz ±10% - fixed oscillator enables predictable EMI filtering and compact magnetics design. |
| Quiescent Supply Current | 8.5mA - enables low-power standby operation; drops to 140µA in shutdown mode. |
| Switch Voltage (VSW to GND) | −45V - allows use in tapped-inductor buck and inverting converters with high output current capability. |
| Thermal Resistance θJA | 30°C/W - measured with 0.5 in² copper pad; enables 2A continuous operation at ≤70°C ambient with minimal heatsinking. |
Pinout & Package
LT1076HVCT#PBF is housed in a 5-lead plastic TO-220 (T) package with tab connected to GND. The package features standard straight leads and is designed for through-hole mounting with thermal relief to PCB copper.
| 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 placed adjacent to pin to suppress switching transients. |
| VSW | Switch collector output | Swings up to 45V below GND; connects to inductor/diode node in buck or inverting topologies. |
| GND | Power and signal reference | Internal reference and error amplifier are referenced to this pin; must connect directly to low-current output return path to avoid load regulation error. |
| VC | Error amplifier output / compensation node | Provides transconductance output (5000 µmho); requires external RC network for loop stability and frequency compensation. |
| FB/SENSE | Inverting input of error amplifier | Compares divided output voltage against 2.21V internal reference; bias current <2 µA enables high-impedance dividers. |
Key Features
| Feature | Design Value |
|---|---|
| Analog multiplier feedback | Eliminates input-voltage-dependent loop gain variation, improving line transient response by >3× versus conventional buck controllers. |
| 45V negative switch swing | Enables tapped-inductor buck configuration delivering 10A at 5V without external high-side driver or level-shifting circuitry. |
| Programmable current limit | 2.6A default limit set by internal 320µA source; no external resistor required in 5-pin T package-simplifies BOM and layout. |
| Frequency shifting below 1.3V FB | Reduces switching frequency from 100kHz to 20kHz during overload, maintaining stable current limiting even at 0.2µs minimum on-time. |
| Micropower shutdown | Reduces total supply current to 140µA; shutdown threshold at 2.45V enables precise undervoltage lockout using simple resistor divider. |
Applications
| Industrial DC-DC Power Supply | Automotive Battery-Driven Converter |
|---|---|
Use Scenario: 24V truck battery powering 12V auxiliary rail in heavy-duty vehicle electronics. IC Role / Device Role / Timing Role: Primary buck controller regulating 12V @ 2A with input range 9V–36V and cold-crank tolerance down to 6V startup. Use Value: 60V absolute max input rating and 8V min operating voltage ensure reliable start-up during cranking; 8.5mA quiescent current minimizes parasitic drain. | Use Scenario: Converting 48V mild-hybrid bus to isolated 5V logic supply for CAN gateway module. IC Role / Device Role / Timing Role: Positive-to-negative converter generating −5V from 48V input using tapped-inductor topology. Use Value: 45V VSW-to-GND rating enables direct drive of center-tapped inductor; eliminates need for external level shifter or gate driver IC. |
| Programmable Lab Power Supply | Industrial IoT Sensor Node Power |
Use Scenario: Benchtop supply with digitally adjustable 3V–30V output and constant-current limit. IC Role / Device Role / Timing Role: Adjustable buck regulator core with external DAC-controlled FB divider and current-sense feedback. Use Value: 2.21V precision reference and <2µA FB bias current enable accurate DAC-based voltage programming with <0.5% error over temperature. | Use Scenario: Low-power remote sensor node powered by 24V industrial field bus, requiring regulated 3.3V @ 500mA. IC Role / Device Role / Timing Role: Primary step-down regulator with micropower shutdown synchronized to MCU sleep cycles. Use Value: 140µA shutdown current and fast wake-up (<100µs) extend battery life; 100kHz switching allows small 10µH inductor and ceramic output cap. |
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 | 42V max input, 2A synchronous buck, 3mm × 4mm MSOP-10, 2.5MHz switching, integrated MOSFETs | Higher efficiency (>92%), smaller solution size, but lacks negative-swing capability and tapped-inductor support | Select when board space and efficiency outweigh need for inverting/tapped configurations. |
| LM2596S-ADJ/NOPB | 40V max input, 3A buck, TO-263-5, 150kHz, no analog multiplier, higher quiescent current (5mA active, 75µA shutdown) | No VSW-to-GND swing specification; cannot support inverting or tapped-inductor topologies | Select for cost-sensitive, non-inverting applications where 45V negative swing is unnecessary. |
Compared with LTC3632EMSE#PBF and LM2596S-ADJ/NOPB, LT1076HVCT#PBF uniquely supports −45V switch swing and analog multiplier feedback-critical for high-dynamic-range industrial converters and multi-topology flexibility-but requires external diode and larger magnetics than modern synchronous alternatives.
Availability
LT1076HVCT#PBF is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery converters, programmable lab equipment, and industrial IoT sensor nodes requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT1076HVCT#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 full legacy support for the LT product family, renowned for high-performance analog and power management ICs targeting demanding industrial, aerospace, and instrumentation applications.
The LT1076HVCT#PBF belongs to Linear's legacy bipolar switching regulator product line, engineered for ruggedness, wide-input operation, and multi-topology flexibility in harsh environments where reliability trumps integration density.
FAQ
What is the maximum input voltage rating for LT1076HVCT#PBF?
The LT1076HVCT#PBF has an absolute maximum input voltage rating of 64V, with guaranteed operation from 8V to 60V. This HV designation differentiates it from the standard LT1076 (45V max), making LT1076HVCT#PBF suitable for 48V industrial and telecom systems with high line transients.
Does LT1076HVCT#PBF support negative-output configurations?
Yes, LT1076HVCT#PBF supports positive-to-negative converter topologies due to its −45V switch-to-ground voltage rating. When configured as an inverting buck-boost, LT1076HVCT#PBF can generate regulated negative outputs-e.g., −5V from 24V input-without external level-shifting circuitry.
Can the current limit of LT1076HVCT#PBF be adjusted externally?
No-the LT1076HVCT#PBF in the 5-lead TO-220 (T) package has a fixed 2.6A current limit set by internal circuitry. External adjustment requires the 7-pin TO-220 (T7) variant (e.g., LT1076HVCT7#PBF) with dedicated ILIM pin and resistor-to-ground connection.
What is the purpose of the analog multiplier in LT1076HVCT#PBF's feedback loop?
The analog multiplier in LT1076HVCT#PBF multiplies the error amplifier output by 1/VIN, rendering loop gain independent of input voltage. This architecture delivers superior line transient response-output deviation under 12V→24V step is typically <1%-and eliminates need for complex feedforward compensation.
Is LT1076HVCT#PBF RoHS compliant and lead-free?
Yes, LT1076HVCT#PBF is RoHS compliant and lead-free. The "#PBF" suffix explicitly denotes lead-free (Pb-free) packaging per Analog Devices' standard product marking convention, with compatible reflow profiles for lead-free soldering processes.
LT1076HVCT#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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LT1076HVCT#PBF FAQ
1.How can I place an order for LT1076HVCT#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076HVCT#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#PBF reliable?
The price and inventory of LT1076HVCT#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#PBF is usually 5 days.
3.What payment methods are accepted for LT1076HVCT#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076HVCT#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076HVCT#PBF?
LT1076HVCT#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076HVCT#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#PBF?
For technical support, including LT1076HVCT#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076HVCT#PBF requirements.
6.How does Aetrix verify that LT1076HVCT#PBF is sourced from the original manufacturer or authorized distributors?
All LT1076HVCT#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#PBF meets industry standards.
7.What is the process for return or replacement of LT1076HVCT#PBF?
All LT1076HVCT#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076HVCT#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#PBF part is unused and in its original packaging.
Return procedure for LT1076HVCT#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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