My Inquiry
My Account
Analog Devices Inc. LT1076IR#TRPBF
- Part No.:
- LT1076IR#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LT1076IR#TRPBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A DDPAK-7
- Quantity:
- Payment:
- Shipping:
Inventory:1,966
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1076IR#TRPBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar step-down switching regulator in a 7-lead TO-220 package, featuring 100kHz fixed-frequency operation, programmable current limit (2.6A typical), 8.5mA quiescent current, and operation up to 60V input. It implements a classic buck topology with analog multiplier-based feedback for line-regulation independence and improved transient response, used in industrial power supplies and embedded DC/DC conversion.
For engineers reviewing the LT1076IR#TRPBF datasheet, LT1076IR#TRPBF pinout, LT1076IR#TRPBF application, or LT1076IR#TRPBF equivalent, key selection considerations include its 2A integrated switch rating, 7-pin TO-220 package with SHDN and ILIM terminals, -40°C to 85°C industrial temperature range, and compatibility with tapped-inductor and inverting configurations.
Technical Context
The LT1076IR#TRPBF 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 for LT1076) supports VSW swing to 40V below ground, enabling positive-to-negative and tapped-inductor topologies.
On-chip pulse-by-pulse current limiting with ≈600ns detection time ensures robust short-circuit protection. Frequency shifting down to 20kHz occurs when FB drops below 1.3V, maintaining control at ultra-low duty cycles during output overload or short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous - defines maximum load capability without external boost circuitry |
| Input Voltage Range | 8V to 60V - supports wide-range industrial and automotive battery-fed inputs |
| Switching Frequency | 100kHz ±10% - enables compact magnetics while balancing EMI and efficiency |
| Current Limit | 2.6A typical (ILIM open) - sets peak switch current threshold for overcurrent protection |
| Quiescent Current | 8.5mA - determines no-load power loss and standby efficiency |
| Reference Voltage | 2.21V ±1.5% - establishes precision output regulation point via external resistor divider |
| Thermal Resistance θJA | 35°C/W - defines junction-to-ambient temperature rise under standard PCB layout |
Pinout & Package
LT1076IR#TRPBF is housed in a 7-lead plastic TO-220 package (T7) with tab connected to GND. The package provides low thermal resistance (θJA = 35°C/W) and mechanical robustness for high-current applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply and high-side switch source | Accepts 8–60V input; carries full switch current; requires low-ESR bypass capacitor |
| VSW | Switch collector output | Drives external inductor; swings to 40V below GND for inverting/tapped-inductor use |
| GND | Power and signal reference | Internal reference ground; must connect directly to low-current output node for regulation accuracy |
| VC | Error amplifier output | Provides compensation node for loop stability; connects to RC network for frequency control |
| FB/SENSE | Inverting input of error amplifier | Monitors output via resistor divider; 2.21V internal reference sets regulated output voltage |
| ILIM | Current limit programming | Open-circuit sets 2.6A limit; external resistor to GND reduces limit down to zero |
| SHDN | Shutdown control | 2.45V threshold enables micropower shutdown (140µA); 0.3V fully disables regulator |
Key Features
| Feature | Design Value |
|---|---|
| Analog multiplier feedback | Eliminates input-voltage dependence in loop gain, improving line transient response by >3× vs conventional buck controllers |
| Programmable current limit | Adjustable from 0A to 2.6A using single resistor on ILIM pin, enabling precise overcurrent tailoring per design |
| Frequency shifting | Automatically reduces switching frequency from 100kHz to 20kHz as FB falls below 1.3V, maintaining control at <2% duty cycle |
| Micropower shutdown | Reduces total supply current to 140µA (max), supporting low-power system sleep modes without external LDO |
| VSW negative swing capability | Supports 40V below GND on VSW, enabling direct implementation of positive-to-negative and tapped-inductor converters |
Applications
| Industrial DC/DC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 24V vehicle battery to stable 5V/2A for microcontroller and sensor rails in harsh environments. IC Role / Device Role / Timing Role: Primary buck regulator controlling MOSFET gate drive via VSW; FB monitors output; SHDN enables ignition-synchronized power sequencing. Use Value: 60V max input withstands load-dump transients; 2.6A current limit protects against motor stall faults; -40°C to 85°C rating ensures reliability across temperature extremes. | Use Scenario: Generating isolated -5V rail from 12V battery for CAN transceiver bias in body electronics. IC Role / Device Role / Timing Role: Positive-to-negative converter using LT1076IR#TRPBF in inverting configuration; VSW drives center-tapped inductor; GND referenced to output return. Use Value: VSW's 40V negative swing enables direct inverting operation without level-shifting; 100kHz frequency minimizes filter size; ILIM pin allows setting safe short-circuit current for fault containment. |
| Programmable Logic Controller (PLC) I/O Module | Industrial Sensor Interface Board |
Use Scenario: Providing regulated 3.3V/1.5A for FPGA and ADC in modular PLC backplane slots with variable input (18–36V). IC Role / Device Role / Timing Role: Buck regulator with adjustable output via FB divider; SHDN controlled by PLC master for hot-swap isolation; VC compensated for wide input range. Use Value: Line-regulation independence ensures <±0.5% output variation across 18–36V input; 8.5mA quiescent current reduces thermal load in dense modules; T7 package enables heatsink mounting. | Use Scenario: Powering 4–20mA transmitter circuits requiring precise 24V output from 36V field bus with current-limiting protection. IC Role / Device Role / Timing Role: Constant-voltage buck regulator with foldback current limiting implemented via RFB from output to ILIM pin. Use Value: Programmable ILIM enables 200mA foldback threshold to protect loop-powered sensors during wiring faults; analog multiplier ensures stable regulation despite bus ripple. |
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 | 2A synchronous buck, 3.6–42V input, 2.5MHz switching, integrated MOSFETs, 30µA quiescent current | Higher efficiency (>92%), smaller solution size, no external diode required; lacks VSW negative swing for inverting use | Select for space-constrained, high-efficiency designs where inverting topology is not needed |
| LM2596S-ADJ/NOPB | 3A buck, 4.5–40V input, 150kHz, 5mA quiescent current, TO-220-5 package, no ILIM or SHDN pins | Lower cost, simpler layout; lacks programmable current limit, micropower shutdown, and analog multiplier line regulation | Select for cost-sensitive, non-critical industrial supplies where dynamic performance is secondary |
Compared with LTC3632EMSE#PBF and LM2596S-ADJ/NOPB, the LT1076IR#TRPBF uniquely combines programmable current limiting, micropower shutdown, and VSW negative swing-enabling inverting and tapped-inductor topologies unattainable with the alternatives-while trading off higher quiescent current and lower switching frequency.
Availability
LT1076IR#TRPBF is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and programmable logic controller (PLC) power supplies requiring stable component supply, long-term lifecycle support, and extended temperature operation.
Supply support for LT1076IR#TRPBF 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 of high-performance analog and power management ICs for demanding applications.
The LT1076IR#TRPBF belongs to Linear's monolithic switching regulator product line, designed specifically for rugged, wide-input industrial and automotive DC/DC conversion where reliability, topology flexibility, and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for the LT1076IR#TRPBF?
The LT1076IR#TRPBF 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 enabled by the self-boot feature. This rating ensures compatibility with 24V and 48V industrial systems and withstands automotive load-dump transients.
Does the LT1076IR#TRPBF support inverting (positive-to-negative) converter topologies?
Yes, the LT1076IR#TRPBF supports inverting topologies due to its VSW pin's ability to swing up to 40V below ground. This capability enables direct implementation of positive-to-negative converters without additional level-shifting circuitry. Application Note 44 provides validated schematics and component values for this configuration using the LT1076IR#TRPBF in a 7-pin TO-220 package.
How is current limit programmed on the LT1076IR#TRPBF?
Current limit on the LT1076IR#TRPBF is programmed via the ILIM pin. With ILIM left open, the internal current limit is 2.6A. Connecting an external resistor from ILIM to GND lowers the limit according to RLIM = ILIM(5.5kΩ) + 1kΩ. For example, a 1.2A limit requires a 7.6kΩ resistor. The LT1076IR#TRPBF datasheet specifies ±25% accuracy for limits between 0.7A and 1.8A.
What is the purpose of the frequency-shifting function on the LT1076IR#TRPBF FB pin?
The frequency-shifting function on the LT1076IR#TRPBF FB pin reduces switching frequency from 100kHz to 20kHz when FB voltage drops below 1.3V. This prevents minimum on-time limitations from compromising current control during severe overload or short-circuit conditions, ensuring stable 2A current limiting even at <2% duty cycle. It is intrinsic to the LT1076IR#TRPBF oscillator architecture and requires no external components.
Can the LT1076IR#TRPBF be used in a tapped-inductor buck configuration?
Yes, the LT1076IR#TRPBF supports tapped-inductor buck operation, delivering up to 10A at 5V output. Its VSW pin's 40V negative swing capability allows driving the center tap of a custom-wound inductor. The LT1076IR#TRPBF's 2.6A internal switch handles primary-side current, while the tapped winding steps up current capability. Layout guidelines and inductor specifications are detailed in Linear's Application Note 44 for the LT1076IR#TRPBF.
LT1076IR#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DDPAK-7
LT1076IR#TRPBF FAQ
1.How can I place an order for LT1076IR#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076IR#TRPBF 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 LT1076IR#TRPBF reliable?
The price and inventory of LT1076IR#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076IR#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1076IR#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076IR#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076IR#TRPBF?
LT1076IR#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076IR#TRPBF 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 LT1076IR#TRPBF?
For technical support, including LT1076IR#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076IR#TRPBF requirements.
6.How does Aetrix verify that LT1076IR#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1076IR#TRPBF 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 LT1076IR#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1076IR#TRPBF?
All LT1076IR#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076IR#TRPBF, 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 LT1076IR#TRPBF part is unused and in its original packaging.
Return procedure for LT1076IR#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1076IR#TRPBF 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…
