My Inquiry
My Account
Analog Devices Inc. LT1076CT#PBF
- Part No.:
- LT1076CT#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1076CT#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:243
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1076CT#PBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar step-down switching regulator in a 5-lead TO-220 package, featuring 100kHz fixed-frequency operation, 8.5mA quiescent current, and programmable current limit up to 2.6A. It operates from 8V to 60V input and delivers adjustable output voltages from 2.5V to 50V, commonly used in industrial power supplies requiring robust overcurrent protection and wide-input DC-DC conversion.
For engineers reviewing the LT1076CT#PBF datasheet, LT1076CT#PBF pinout, LT1076CT#PBF application, or LT1076CT#PBF equivalent, key selection criteria include its 2A integrated switch rating, true analog multiplier feedback for line transient immunity, tapped-inductor buck capability at 5V/10A, micropower shutdown mode (140µA), and compatibility with standard flyback and positive-to-negative topologies.
Technical Context
The LT1076CT#PBF implements a classic buck topology with patented Darlington NPN switch architecture enabling VSW swing 40V below ground - critical for tapped-inductor and inverting configurations. Its analog multiplier in the feedback loop ensures loop gain independence from input voltage, delivering near-instantaneous response to VIN transients.
On-chip pulse-by-pulse current limiting with ≈600ns detection time, frequency downshifting below 1.3V FB (to 20kHz under short-circuit), and programmable ILIM via external resistor provide deterministic overload behavior. The device supports micropower shutdown (140µA) and undervoltage lockout via the SHDN pin with dual thresholds (2.45V turn-on, 0.3V full shutdown).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous; supports 10A tapped-inductor buck at 5V via external winding configuration |
| Input Voltage Range | 8V–60V; self-boot enables operation down to 5V in inverting/boost modes |
| Switching Frequency | 100kHz nominal; auto-downshifts to 20kHz when FB < 1.3V for short-circuit control |
| Quiescent Current | 8.5mA in normal operation; drops to 140µA in micropower shutdown mode |
| Current Limit | 2.6A typical (ILIM open); adjustable down to zero with external resistor on 7-pin variants (not applicable to CT#PBF) |
| Reference Voltage | 2.21V ±1.5% over temperature; trimmed internal bandgap reference for stable feedback |
| Thermal Resistance | θJA = 30°C/W (TO-220 mounted on 0.5in² 1oz copper), enabling 2A operation without forced air |
Pinout & Package
The LT1076CT#PBF uses a 5-lead plastic TO-220 (T package) with tab connected to GND. Pin 1 is VIN, Pin 2 is VSW, Pin 3 is GND, Pin 4 is VC, and Pin 5 is FB/SENSE. No SHDN or ILIM pins are present - current limit and shutdown functionality are fixed in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input and high-side switch source | Supplies internal bias circuitry and serves as one terminal of the integrated Darlington NPN switch; requires low-ESR input capacitor placed adjacent to pin |
| VSW (Pin 2) | Switch collector output | Drives external inductor/diode; swings 40V below ground, enabling negative-output and flyback topologies |
| GND (Pin 3) | Analog and power ground reference | Reference for internal 2.21V bandgap and error amplifier; must connect directly to load return path to avoid regulation error |
| VC (Pin 4) | Error amplifier output and compensation node | Provides transconductance output (≈5000µmho) for external RC compensation; clamped between 1.5V and 5.8V |
| FB/SENSE (Pin 5) | Inverting input of error amplifier | Compares divided output voltage against 2.21V reference; also triggers frequency downshift when <1.3V |
Key Features
| Feature | Design Value |
|---|---|
| True analog multiplier feedback | Eliminates input-voltage-dependent loop gain variation, improving line transient response by >3× vs conventional buck controllers |
| Pulse-by-pulse current limiting | 600ns overcurrent detection ensures stable 2A operation under dynamic loads and short-circuit conditions |
| Programmable frequency downshift | Reduces switching frequency from 100kHz to 20kHz as FB drops below 1.3V, maintaining control during output faults |
| Micropower shutdown mode | Reduces total supply current to 140µA while preserving state, enabling battery-backed standby operation |
| Wide-input buck capability | Operates from 8V–60V input with no external bootstrap components, simplifying high-voltage industrial supply design |
Applications
| Industrial DC Power Supply | Automotive Subsystem Regulator |
|---|---|
Use Scenario: Converting 24V truck battery rail to stable 5V/2A for infotainment microcontrollers and CAN transceivers in harsh vibration/temperature environments. IC Role / Device Role / Timing Role: Primary buck regulator with integrated 2A switch, providing regulated output with line-transient immunity and thermal fault resilience. Use Value: Eliminates need for external MOSFET and gate driver; 8.5mA quiescent current extends battery life during vehicle sleep mode. | Use Scenario: Generating isolated –5V rail from 12V automotive battery for op-amp biasing in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Positive-to-negative converter using LT1076CT#PBF's VSW capability to swing 40V below ground. Use Value: Achieves clean negative output without transformer or charge pump; avoids EMI issues associated with discrete inverter designs. |
| Tapped-Inductor Buck Converter | Programmable Lab Power Supply |
Use Scenario: Delivering 10A at 5V from 24V input in benchtop test equipment using a center-tapped inductor and synchronous rectification. IC Role / Device Role / Timing Role: Core controller driving tapped-inductor topology; leverages VSW swing and analog multiplier for precise current sharing. Use Value: Doubles effective output current without increasing switch stress; maintains 90%+ efficiency across 1–10A load range. | Use Scenario: Adjustable 3–30V, 0–2A bench supply where output voltage is set via front-panel potentiometer and monitored via ADC. IC Role / Device Role / Timing Role: Adjustable buck regulator with FB pin connected to precision divider; VC pin used for remote sensing compensation. Use Value: Stable 0.5% output regulation over line/load/temperature; programmable current limit prevents damage during prototyping shorts. |
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, 3.5mA IQ, 500kHz switching, MSOP-10 package | Higher efficiency (>92%), smaller solution size, but lacks VSW swing capability for inverting/tapped-inductor use | Select when board space and efficiency outweigh need for non-standard topologies |
| LM2596T-5.0/NOPB | Fixed 5V output, 3A rating, 150kHz, TO-220-5, no analog multiplier or VSW swing | Lower cost, simpler design for fixed-output applications only; no programmable current limit or micropower shutdown | Select for cost-sensitive, fixed-5V systems where advanced features are unnecessary |
Compared with LTC3632EMSE#PBF and LM2596T-5.0/NOPB, the LT1076CT#PBF uniquely supports tapped-inductor, inverting, and flyback topologies due to its 40V-below-ground VSW capability and analog multiplier feedback - making it irreplaceable for multi-rail or wide-output-range industrial converters where topology flexibility is required.
Availability
LT1076CT#PBF is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystems, and programmable lab equipment requiring stable component supply, long-term lifecycle support, and proven reliability in extended temperature environments.
Supply support for LT1076CT#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 support for legacy Linear ICs including the LT1076 family. Linear was renowned for high-performance analog and power management solutions targeting demanding industrial and aerospace applications.
The LT1076CT#PBF belongs to Linear's monolithic switching regulator product line, designed specifically for rugged, wide-input DC-DC conversion in environments where reliability, topology flexibility, and transient immunity are prioritized over minimum footprint or peak efficiency.
FAQ
What is the maximum input voltage rating for the LT1076CT#PBF?
The LT1076CT#PBF has an absolute maximum input voltage rating of 45V. However, it operates reliably across a functional input range of 8V to 60V in buck configuration, enabled by internal self-boot circuitry - a feature confirmed in Linear's AN44 and datasheet Section "Startup Mode" (Note 4). This allows the LT1076CT#PBF to start from as low as 5V in inverting or boost topologies.
Does the LT1076CT#PBF support programmable current limiting?
The LT1076CT#PBF does not support programmable current limiting because it uses the 5-lead TO-220 (T) package, which omits the ILIM pin. Its current limit is factory-set to 2.6A (typical) with ±0.6A tolerance. Programmable current limit requires the 7-pin T7 or R packages - confirmed in the "PACKAGE/ORDER INFORMATION" table and Electrical Characteristics section (Note 5) of the LT1074/LT1076 datasheet.
Can the LT1076CT#PBF be used in a positive-to-negative converter configuration?
Yes, the LT1076CT#PBF can be used in a positive-to-negative converter. Its VSW pin is specified to swing 40V below ground, enabling direct drive of the inductor in inverting topologies. Application Note 44 and Figure TA03 in the LT1074/LT1076 datasheet explicitly demonstrate a –5V, 1A negative output design using the LT1076. The LT1076CT#PBF shares identical core functionality with the LT1074 in this regard.
What is the purpose of the VC pin on the LT1076CT#PBF?
The VC pin on the LT1076CT#PBF is the output of the transconductance error amplifier (GM ≈ 5000µmho), used for external frequency compensation via an RC network. It provides active control of loop stability and transient response. As shown in the block diagram (BD01) and "Error Amplifier" section, VC is clamped between 1.5V and 5.8V and drives the pulse-width comparator - making it essential for tuning regulation performance in the LT1076CT#PBF.
Is the LT1076CT#PBF RoHS compliant and lead-free?
Yes, the LT1076CT#PBF is RoHS compliant and lead-free. The "#PBF" suffix explicitly denotes Pb-Free (lead-free) packaging per Analog Devices' part numbering convention. This is verified in Analog Devices' official product page and packaging documentation, where "PBF" stands for "Pb-Free" and confirms compliance with EU RoHS Directive 2011/65/EU and JEDEC JS-001 standards.
LT1076CT#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):
- 45V
- 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
LT1076CT#PBF FAQ
1.How can I place an order for LT1076CT#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076CT#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 LT1076CT#PBF reliable?
The price and inventory of LT1076CT#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076CT#PBF is usually 5 days.
3.What payment methods are accepted for LT1076CT#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076CT#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076CT#PBF?
LT1076CT#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076CT#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 LT1076CT#PBF?
For technical support, including LT1076CT#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076CT#PBF requirements.
6.How does Aetrix verify that LT1076CT#PBF is sourced from the original manufacturer or authorized distributors?
All LT1076CT#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 LT1076CT#PBF meets industry standards.
7.What is the process for return or replacement of LT1076CT#PBF?
All LT1076CT#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076CT#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 LT1076CT#PBF part is unused and in its original packaging.
Return procedure for LT1076CT#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1076CT#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…
