My Inquiry
My Account
Analog Devices Inc. LT1076HVIT#PBF
- Part No.:
- LT1076HVIT#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1076HVIT#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,813
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1076HVIT#PBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar step-down switching regulator IC with integrated power switch, oscillator, and current-limit circuitry. It supports buck, positive-to-negative, and negative-boost topologies; operates from 8V to 60V input; delivers adjustable output from 2.5V to 50V; and features 100kHz fixed-frequency switching, 2.6A programmable current limit, and 8.5mA quiescent current. It is used in industrial power supplies requiring high-input-voltage DC/DC conversion.
For engineers reviewing the LT1076HVIT#PBF datasheet, LT1076HVIT#PBF pinout, LT1076HVIT#PBF application, or LT1076HVIT#PBF equivalent, key selection considerations include its HV-rated 64V max input voltage, 7-pin TO-220 package with SHDN and ILIM pins, tapped-inductor capability up to 10A at 5V, analog multiplier-based feedback for line transient immunity, and micropower shutdown mode.
Technical Context
The LT1076HVIT#PBF 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 (single NPN for LT1076 variant) swings 45V below ground, enabling tapped-inductor and inverting configurations.
It integrates pulse-by-pulse current limiting via internal 320µA ILIM bias source, with current limit set by open-circuit voltage (~4.5V) or external resistor to GND. Shutdown control is implemented through a dedicated SHDN pin with dual thresholds: ~2.45V for duty-cycle halt and ~0.3V for full micropower mode (140–300µA supply current).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8V to 60V - supports wide industrial input rails including 24V, 36V, and 48V systems without pre-regulation. |
| Output Voltage Range | 2.5V to 50V - adjustable via external resistor divider; reference voltage is trimmed to 2.21V ±1.5% over temperature. |
| Switch Current Limit | 2.6A typical (open ILIM) - programmable down to zero with external resistor; enables precise overload protection and soft-start control. |
| Switching Frequency | 100kHz nominal - fixed frequency simplifies EMI filtering; shifts down to ~20kHz under low-VOUT conditions to maintain short-circuit control. |
| Quiescent Supply Current | 8.5mA typical - enables efficient operation in medium-load applications; drops to 140–300µA in shutdown mode. |
| Thermal Resistance θJA | 35°C/W - measured in 7-lead TO-220 package with standard PCB copper; supports 2A continuous output with moderate heatsinking. |
| Switch "On" Voltage | 1.7V at 2A - low saturation loss improves efficiency at full load; specified across full industrial temperature range (–40°C to +85°C). |
Pinout & Package
The LT1076HVIT#PBF is housed in a 7-lead plastic TO-220 (T7) package with tab connected to GND. Pin 1 is VIN; pin 2 is VSW; pin 3 is GND; pin 4 is VC; pin 5 is FB/SENSE; pin 6 is ILIM; pin 7 is SHDN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply and high-side switch source | Carries full input current; must be bypassed with low-ESR capacitor close to pin to suppress dI/dt spikes. |
| VSW (Pin 2) | Switch collector output | Swings to 45V below GND-enables negative-output and tapped-inductor topologies; requires catch diode or synchronous rectifier. |
| GND (Pin 3) | Reference node for internal circuits and feedback | Must connect directly to low-current output return path to avoid load regulation error; not shared with high-current paths. |
| VC (Pin 4) | Error amplifier output and compensation node | Drives external RC network for loop stability; asymmetrical ±140µA/1.1mA sink-source capability reduces startup overshoot. |
| FB/SENSE (Pin 5) | Inverting input of error amplifier | Compares output voltage (via divider) against 2.21V internal reference; bias current ≤2µA ensures minimal divider loading. |
| ILIM (Pin 6) | Current limit programming input | Internally biased at 320µA; open-circuit sets 2.6A limit; resistor to GND scales limit linearly per RLIM = ILIM(5.5kΩ) + 1kΩ. |
| SHDN (Pin 7) | Shutdown control input | 2.45V threshold halts switching; 0.3V threshold enables micropower mode; 10µA internal pull-up allows simple RC delay startup. |
Key Features
| Feature | Design Value |
|---|---|
| Analog multiplier feedback loop | Eliminates input-voltage dependence in loop gain-ensures consistent dynamic response across 8–60V input range. |
| Tapped-inductor buck support | Enables 10A output at 5V using external inductor tap-ideal for high-current industrial loads without external MOSFETs. |
| Programmable current limit with soft-start | External resistor on ILIM pin sets precise trip point; parallel capacitor provides controlled current ramp during startup. |
| Frequency shifting under low-VOUT | Reduces switching frequency from 100kHz to ~20kHz when FB drops below 1.3V-maintains stable current limiting during short-circuit events. |
| Micropower shutdown mode | Reduces total supply current to ≤300µA-supports battery-backed or energy-sensitive standby states. |
Applications
| Industrial 24V-to-5V Power Supply | High-Voltage Battery-Powered Instrumentation |
|---|---|
Use Scenario: Converting unregulated 24V rail from PLC backplane to clean 5V for microcontroller and sensor subsystems. IC Role / Device Role / Timing Role: Primary buck regulator IC providing isolated, regulated 5V output with current limiting and thermal robustness. Use Value: Delivers stable 5V at up to 2A with <1% line regulation; analog multiplier ensures fast recovery from 24V input dips common in factory environments. | Use Scenario: Powering portable test equipment from 36V or 48V Li-ion battery packs with variable state-of-charge. IC Role / Device Role / Timing Role: High-input-voltage DC/DC converter enabling single-stage conversion without intermediate 12V stage. Use Value: Operates down to 8V input-supports full battery discharge range; 64V absolute max rating prevents damage during load-dump transients. |
| Positive-to-Negative Converter | Fieldbus Interface Power |
Use Scenario: Generating –5V rail for RS-485 transceivers and isolated analog front-ends in industrial gateways. IC Role / Device Role / Timing Role: Inverting switching regulator IC configured in positive-to-negative topology with tapped inductor. Use Value: Achieves –5V at 1A using same external components as buck mode; 45V negative swing capability eliminates need for floating ground references. | Use Scenario: Providing isolated ±12V and 5V rails for PROFIBUS DP or CAN FD interface modules mounted on DIN-rail controllers. IC Role / Device Role / Timing Role: Core DC/DC controller managing multiple outputs via coupled inductors and auxiliary windings. Use Value: Supports multi-output designs with tight cross-regulation; programmable current limit protects against bus fault currents without external sensing. |
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; 3.3V/5V fixed or adjustable; 3.5mA IQ; no ILIM/SHDN pins. | Lacks programmable current limit and dedicated shutdown-requires external logic for fault management. | Preferred where ultra-low quiescent current and synchronous efficiency outweigh need for analog current limiting. |
| LM5164QPWPRQ1 | 4–65V input; 1.5A; 100kHz–2.2MHz adjustable freq; integrated high-side FET; 100µA IQ; no analog multiplier. | No line-transient immunity enhancement; requires external compensation; lower current rating. | Suitable for automotive applications needing AEC-Q100 qualification and higher switching frequency flexibility. |
Compared with LTC3632EMSE#PBF and LM5164QPWPRQ1, the LT1076HVIT#PBF uniquely combines HV input tolerance, analog multiplier-based line regulation, and fully programmable current limiting in a single 7-pin TO-220 package-making it optimal for ruggedized industrial power where transient immunity and fault control are critical.
Availability
LT1076HVIT#PBF is available at Aetrix Electronics and suitable for industrial automation, railway signaling, and high-voltage test equipment requiring stable component supply with long-term lifecycle assurance.
Supply support for LT1076HVIT#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 product support, documentation, and manufacturing continuity for legacy Linear regulators.
The LT1076HVIT#PBF belongs to Linear's high-voltage monolithic switching regulator family, designed specifically for industrial and telecom power systems demanding robust operation across wide input ranges without external high-voltage transistors.
FAQ
What is the maximum input voltage rating for the LT1076HVIT#PBF?
The LT1076HVIT#PBF has an absolute maximum input voltage rating of 64V, with guaranteed operation from 8V to 60V. This HV rating distinguishes it from the standard LT1076 (45V max), making the LT1076HVIT#PBF suitable for 48V industrial buses and battery systems where load-dump transients exceed 50V.
Does the LT1076HVIT#PBF support negative-output configurations?
Yes, the LT1076HVIT#PBF supports positive-to-negative converter topologies due to its switch output rated to swing 45V below ground. When configured as an inverting regulator, it delivers stable negative output voltages-such as –5V at 1A-using standard external components and no additional level-shifting circuitry.
How is current limit programmed on the LT1076HVIT#PBF?
Current limit on the LT1076HVIT#PBF is programmed via the ILIM pin, which sources a precise 320µA internal current. With ILIM left open, the device defaults to 2.6A. Connecting an external resistor RLIM from ILIM to GND sets ILIM ≈ (320µA × RLIM), following RLIM = ILIM(5.5kΩ) + 1kΩ. A capacitor in parallel provides soft-start functionality.
What is the purpose of the analog multiplier in the LT1076HVIT#PBF feedback loop?
The analog multiplier in the LT1076HVIT#PBF feedback loop multiplies the error amplifier output by a normalized input voltage signal, ensuring loop gain remains constant regardless of VIN. This architecture delivers superior line transient response-critical in applications like factory automation where input rails experience rapid dips and surges.
Can the LT1076HVIT#PBF operate with input voltage below 8V?
No-the LT1076HVIT#PBF requires minimum 8V on VIN for normal regulation. However, in inverting or boost configurations, its self-boot feature allows startup from as low as 5V input. This behavior is confirmed in the datasheet's "Startup Mode" specification and applies only to non-buck topologies.
LT1076HVIT#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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LT1076HVIT#PBF FAQ
1.How can I place an order for LT1076HVIT#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076HVIT#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 LT1076HVIT#PBF reliable?
The price and inventory of LT1076HVIT#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076HVIT#PBF is usually 5 days.
3.What payment methods are accepted for LT1076HVIT#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076HVIT#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076HVIT#PBF?
LT1076HVIT#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076HVIT#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 LT1076HVIT#PBF?
For technical support, including LT1076HVIT#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076HVIT#PBF requirements.
6.How does Aetrix verify that LT1076HVIT#PBF is sourced from the original manufacturer or authorized distributors?
All LT1076HVIT#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 LT1076HVIT#PBF meets industry standards.
7.What is the process for return or replacement of LT1076HVIT#PBF?
All LT1076HVIT#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076HVIT#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 LT1076HVIT#PBF part is unused and in its original packaging.
Return procedure for LT1076HVIT#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1076HVIT#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
