My Inquiry
My Account
Analog Devices Inc. LT1076CT#30PBF
- Part No.:
- LT1076CT#30PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LT1076CT#30PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:812
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1076CT#30PBF from Analog Devices (formerly Linear Technology) is a 2A monolithic bipolar step-down switching regulator IC in a 5-lead TO-220 package, featuring 100kHz fixed-frequency operation, 8.5mA quiescent current, programmable current limit (2.6A typical), and input voltage range up to 60V. It implements a classic buck topology with analog multiplier-based feedback for improved line transient response and operates in automotive and industrial DC/DC conversion applications.
For engineers reviewing the LT1076CT#30PBF datasheet, LT1076CT#30PBF pinout, LT1076CT#30PBF application, or LT1076CT#30PBF equivalent, key selection criteria include its 2A integrated switch rating, 2.21V precision reference, shutdown pin control, tapped-inductor capability for higher output current, and compatibility with standard buck, positive-to-negative, and negative-boost configurations.
Technical Context
The LT1076CT#30PBF uses an internal Darlington NPN power switch with 1.7V typical "on" voltage at 2A, driven by a saturated PNP stage and proprietary fast-switching circuitry enabling operation down to 40V below ground on the VSW pin. Its analog multiplier in the feedback loop ensures loop gain independence from input voltage, delivering superior dynamic behavior during line transients.
Switching frequency is internally fixed at 100kHz (±10%) and shifts linearly to ~20kHz when FB falls below 1.3V-enabling stable short-circuit current control. Current limiting is pulse-by-pulse, with trip level set either open-circuit (2.6A) or via external resistor on ILIM pin, and shutdown is implemented by pulling the SHDN pin below 0.3V for micropower mode (140µA typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous; supports tapped-inductor designs for up to 10A at 5V with proper layout and external components. |
| Input Voltage Range | 7.3V to 60V; startup possible from as low as 3.5V in inverting/boost modes due to self-boot feature. |
| Switching Frequency | 100kHz nominal; automatically reduces to ~20kHz under low-output-voltage conditions to maintain minimum on-time control. |
| Reference Voltage | 2.21V ±1.5% over temperature; trimmed internal bandgap reference used for precise output regulation. |
| Quiescent Current | 8.5mA typical in normal operation; drops to 140µA in micropower shutdown mode. |
| Current Limit | 2.6A typical when ILIM pin left open; adjustable down to zero using external resistor in 7-pin variants (not applicable to this 5-pin T-package). |
| Thermal Resistance | θJA = 30°C/W (TO-220 mounted on 0.5 in² 1 oz copper); θJC = 4°C/W enables high-power dissipation with heatsink. |
Pinout & Package
LT1076CT#30PBF is housed in a 5-lead plastic TO-220 package (T package) with tab connected to GND. The device requires no heatsink for ≤1.5W dissipation but benefits from thermal relief on the GND lead for higher loads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply and high-side switch source | Accepts 7.3V–60V; also supplies internal bias circuitry; must be bypassed with low-ESR capacitor near pin. |
| VSW | Switch collector output | Swings up to 40V below GND; connects to inductor/diode node in buck topology; drives external catch diode. |
| GND | Power and signal reference | Internal reference and error amplifier ground; must connect directly to low-current output return path to avoid load regulation error. |
| VC | Error amplifier output | Drives external compensation network (RC); clamped at 1.5V min and 5.8V max; asymmetrical sourcing/sinking improves startup behavior. |
| FB/SENSE | Inverting input of error amplifier | Compares divided output voltage against 2.21V reference; bias current <2µA; sensitive to ripple-requires clean feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| Analog multiplier feedback | Enables input-voltage-independent loop gain, reducing line transient overshoot and simplifying compensation across wide VIN ranges. |
| Pulse-by-pulse current limiting | Guarantees robust short-circuit protection with <600ns fault detection and turn-off, eliminating need for external current-sense resistors. |
| Programmable shutdown | SHDN pin allows undervoltage lockout, soft-start, delayed enable, and full micropower mode (140µA IQ) with 2.45V turn-on threshold. |
| Frequency shifting at low VOUT | Reduces switching frequency from 100kHz to ~20kHz when FB drops below 1.3V, maintaining controllable duty cycle even during output shorts. |
| Ground-referenced switch output | VSW pin rated to swing 40V below GND, enabling direct drive of tapped-inductor buck and positive-to-negative converter topologies without level-shifting. |
Applications
| Automotive Infotainment Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Converts 12V–24V vehicle battery to regulated 5V/2A for display controller and USB hub in head unit. IC Role / Device Role / Timing Role: Primary buck regulator with integrated switch; provides stable 5V rail with fast line transient response to engine cranking dips. Use Value: 8.5mA quiescent current minimizes battery drain in standby; 60V max input withstands load-dump transients without external protection. | Use Scenario: Generates isolated –5V rail from +24V field bus to power analog sensor interfaces in modular I/O chassis. IC Role / Device Role / Timing Role: Positive-to-negative inverting converter; leverages VSW's –40V swing capability to eliminate floating gate drivers. Use Value: Eliminates need for separate isolated DC/DC module; achieves >85% efficiency at 1A load with standard magnetics and MBR745 diode. |
| Telecom Remote Radio Unit | Medical Point-of-Care Monitor |
Use Scenario: Steps down 48V backplane voltage to 3.3V for FPGA and ADC in compact RRH enclosure with strict thermal limits. IC Role / Device Role / Timing Role: High-input-voltage buck regulator; operates at 100kHz to minimize EMI filter size while meeting EN55022 Class B. Use Value: 30°C/W θJA enables 2A output without forced air; frequency shift prevents instability during brownout events. | Use Scenario: Powers low-noise analog front-end and microcontroller from 9V battery in portable ECG device requiring long runtime. IC Role / Device Role / Timing Role: Micropower buck regulator; enters 140µA shutdown between measurements to extend battery life. Use Value: Shutdown pin controlled by MCU GPIO enables precise power cycling; 2.21V reference ensures ±1% output accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3605EMSE#PBF | 2.5A synchronous buck, 3MHz switching, integrated MOSFETs, 2.5V–5.5V input only | Not suitable for >6V input; superior light-load efficiency but lacks high-VIN capability and VSW swing below GND | Select only for low-input, high-frequency, space-constrained designs where 60V input tolerance is unnecessary. |
| LM2678-5.0/NOPB | 5A buck regulator, 60V input, 5V fixed output, no ILIM/shutdown pins, 260kHz freq | Fixed 5V output only; no programmable current limit or micropower shutdown; less precise reference (5V ±2%) | Choose when fixed 5V output suffices and design simplicity outweighs need for adjustability and low-IQ. |
Compared with LTC3605EMSE#PBF and LM2678-5.0/NOPB, LT1076CT#30PBF uniquely combines 60V input tolerance, –40V VSW swing, analog multiplier loop stability, and micropower shutdown-making it irreplaceable in high-reliability, multi-topology, wide-input industrial and automotive converters.
Availability
LT1076CT#30PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, telecom remote radio units, and medical point-of-care monitors requiring stable component supply, long-term lifecycle support, and proven ruggedness in harsh environments.
Supply support for LT1076CT#30PBF 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 parts including the LT1076 series.
The LT1076 belongs to Linear's monolithic bipolar switching regulator family, designed specifically for robust, high-voltage DC/DC conversion in automotive, industrial, and telecom infrastructure where reliability, wide input range, and multi-topology flexibility are critical.
FAQ
What is the maximum input voltage rating for LT1076CT#30PBF?
The LT1076CT#30PBF has an absolute maximum input voltage rating of 45V, with recommended operating range up to 60V in buck configuration due to its self-boot feature. Exceeding 45V risks permanent damage unless using the HV variant (LT1076HVCT#30PBF), which supports 64V absolute maximum input.
Can LT1076CT#30PBF be used in a positive-to-negative inverting configuration?
Yes, LT1076CT#30PBF supports positive-to-negative conversion because its VSW pin is rated to swing up to 40V below ground. This eliminates the need for level-shifting circuitry and enables direct implementation of inverting topologies using standard magnetics and diodes, as documented in Linear Application Note 44.
Does LT1076CT#30PBF have built-in current limiting, and how is it configured?
Yes, LT1076CT#30PBF features pulse-by-pulse current limiting with a typical trip level of 2.6A when the ILIM pin is left open. Unlike 7-pin variants, the 5-pin LT1076CT#30PBF does not support external adjustment of current limit-the ILIM pin is unused and must be left unconnected or tied to GND per datasheet guidance.
What is the purpose of the VC pin on LT1076CT#30PBF, and how should it be used?
The VC pin on LT1076CT#30PBF is the output of the internal transconductance error amplifier. It must be connected to an external RC compensation network between VC and GND to stabilize the control loop. Typical values are RC = 10kΩ and CC = 100nF, but exact values depend on inductor value, output capacitance, and desired phase margin.
Is LT1076CT#30PBF RoHS compliant and lead-free?
Yes, LT1076CT#30PBF is RoHS compliant and lead-free. The "#30PBF" suffix explicitly denotes Pb-free (lead-free) packaging per Analog Devices' part numbering convention, and the device meets JEDEC J-STD-020 moisture sensitivity level 3 requirements.
LT1076CT#30PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- 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 Flow 30
LT1076CT#30PBF FAQ
1.How can I place an order for LT1076CT#30PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1076CT#30PBF 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#30PBF reliable?
The price and inventory of LT1076CT#30PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1076CT#30PBF is usually 5 days.
3.What payment methods are accepted for LT1076CT#30PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1076CT#30PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1076CT#30PBF?
LT1076CT#30PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1076CT#30PBF 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#30PBF?
For technical support, including LT1076CT#30PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1076CT#30PBF requirements.
6.How does Aetrix verify that LT1076CT#30PBF is sourced from the original manufacturer or authorized distributors?
All LT1076CT#30PBF 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#30PBF meets industry standards.
7.What is the process for return or replacement of LT1076CT#30PBF?
All LT1076CT#30PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1076CT#30PBF, 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#30PBF part is unused and in its original packaging.
Return procedure for LT1076CT#30PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1076CT#30PBF 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…
