My Inquiry
My Account
Analog Devices Inc. LT1074HVCT#06PBF
- Part No.:
- LT1074HVCT#06PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1074HVCT#06PBF.pdf
- Description:
- IC REG BUCK BST ADJ 5.5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,097
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1074HVCT#06PBF from Analog Devices (formerly Linear Technology) is a 5A monolithic bipolar step-down switching regulator with integrated power switch, oscillator, and current-limit circuitry. It operates from 8V to 60V input, delivers adjustable output from 2.5V to 50V, features 100kHz fixed-frequency operation, 8.5mA quiescent current, and supports tapped-inductor buck configurations up to 10A at 5V in industrial power supplies.
For engineers reviewing the LT1074HVCT#06PBF datasheet, LT1074HVCT#06PBF pinout, LT1074HVCT#06PBF application, or LT1074HVCT#06PBF equivalent, key selection criteria include high-voltage input capability (60V max), onboard 5A Darlington switch, programmable current limit via ILIM pin, micropower shutdown mode, and compatibility with buck, positive-to-negative, and negative-boost topologies.
Technical Context
The LT1074HVCT#06PBF implements a classic buck topology enhanced with an analog multiplier in the feedback loop, enabling near-instantaneous line transient response and input-voltage-independent loop gain. Its switch output swings 40V below ground, enabling tapped-inductor configurations for high-current 5V outputs.
It integrates pulse-by-pulse current limiting with ≈600ns fault detection, thermal shutdown, and frequency downshifting (100kHz → 20kHz) when FB falls below 1.3V-critical for short-circuit current control. The device uses a Darlington NPN switch driven by patented fast-saturation PNP circuitry, eliminating isolation tubs to allow deep negative swing at VSW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8V to 60V - supports wide-input industrial and telecom power rails without external pre-regulation. |
| Output Current | 5A continuous - enables single-chip 5V/5A or 12V/3A buck converters; up to 10A in tapped-inductor configuration. |
| Switching Frequency | 100kHz (±10%) - balances EMI, efficiency, and passive component size; auto-reduces to 20kHz under severe overload. |
| Quiescent Current | 8.5mA - minimizes no-load power loss in always-on systems; drops to 140µA in micropower shutdown. |
| Current Limit | 6.5A typical (ILIM open) - provides robust short-circuit protection; adjustable down to zero via external resistor on ILIM pin. |
| Reference Voltage | 2.21V ±1.5% - precision trimmed internal reference enables accurate output voltage setting across temperature and load. |
| Thermal Resistance θJA | 35°C/W - measured with 0.5 in² 1 oz copper over internal ground plane; enables 5A operation at ≤85°C ambient with minimal heatsinking. |
Pinout & Package
LT1074HVCT#06PBF is supplied in a 5-lead plastic TO-220 package (T package, leads formed straight per Flow 06). The case (tab) is electrically connected to GND, providing low-thermal-resistance mounting and inherent grounding path for the power switch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply and high-side switch source | Carries full input current and high di/dt switching transients; must be bypassed with low-ESR/low-inductance capacitor placed adjacent to pin. |
| VSW | Switch collector output | Swings from VIN to 40V below GND; drives external inductor/diode; requires careful layout to minimize ringing and EMI. |
| GND | Power and signal reference | Internal reference and error amplifier ground; must connect directly to low-current output return point to avoid load regulation error. |
| VC | Error amplifier output | Drives external RC compensation network; asymmetrical ±140µA/1.1mA sink-source capability reduces startup overshoot. |
| FB/SENSE | Inverting input of error amplifier | Compares divided output voltage against 2.21V reference; bias current <2µA; sensitive to ripple (100mVpp → 0.7% output shift). |
Key Features
| Feature | Design Value |
|---|---|
| Analog multiplier feedback | Eliminates input-voltage dependence in loop gain, delivering consistent dynamic response across 8–60V input range. |
| Tapped-inductor support | Enables 10A @ 5V output using standard 5A switch - doubles effective current capability without external MOSFETs. |
| Programmable current limit | ILIM pin accepts external resistor to set precise trip threshold from 0A to 6.5A - simplifies design for varying load profiles. |
| Micropower shutdown | Reduces total supply current to 140µA - ideal for battery-backed or energy-sensitive standby modes. |
| Frequency downshifting | Automatically lowers switching frequency from 100kHz to 20kHz during low-output or short-circuit conditions to maintain stable current control. |
Applications
| Industrial DC-DC Power Supply | Telecom Line Card Power |
|---|---|
Use Scenario: Converting 24V or 48V backplane voltage to isolated 5V/3.3V for FPGA, DSP, and interface ICs in ruggedized enclosures. IC Role / Device Role / Timing Role: Primary buck controller managing high-efficiency, high-reliability conversion with thermal foldback and input UVLO. Use Value: 5A integrated switch eliminates external MOSFET drive complexity; 60V input rating accommodates 48V telecom transients (IEC 61000-4-5); TO-220 package enables direct heatsink mounting. | Use Scenario: Generating –5V rail from +24V supply for analog front-end circuits requiring clean negative bias in base station equipment. IC Role / Device Role / Timing Role: Positive-to-negative inverting converter operating in continuous conduction mode with fixed 100kHz switching. Use Value: VSW's ability to swing 40V below GND enables efficient inverting operation without level-shifting circuitry; low 8.5mA quiescent current extends system standby time. |
| High-Current LED Driver | Test Equipment Power Module |
Use Scenario: Driving parallel strings of high-brightness LEDs (e.g., 36V, 3A) from 48V industrial bus with tight current regulation. IC Role / Device Role / Timing Role: Constant-voltage buck regulator with external current-sense resistor and programmable ILIM for overcurrent protection. Use Value: Adjustable current limit allows precise LED string current setting; 100kHz operation enables compact magnetics; thermal shutdown prevents damage during thermal runaway. | Use Scenario: Programmable bench power supply module delivering 3–30V, 0–5A output with remote sensing and digital control interface. IC Role / Device Role / Timing Role: Core voltage-regulating element controlled via DAC-adjusted FB divider; supports CV/CC transition via ILIM monitoring. Use Value: Micropower shutdown enables fast turn-off with <300µA leakage; frequency downshifting ensures stable CC mode during output short; VC pin allows external loop compensation for wide bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3775EFE#TRPBF | External MOSFET controller (no integrated switch); 4.5–38V input; 100kHz–1MHz sync'able frequency; higher efficiency at light loads. | Requires external high-side/lower MOSFETs and gate drivers; suited for >10A or >95% efficiency designs where thermal management is critical. | Select LTC3775EFE#TRPBF when board space permits discrete FETs and efficiency above 92% at 2A–5A is required; not drop-in compatible. |
| LM5088MHX/NOPB | 5A integrated buck controller; 4.5–65V input; 50–1000kHz adjustable frequency; no analog multiplier; simpler loop compensation. | Lacks tapped-inductor and inverting topology support; less robust line transient response; lower quiescent current (2.1mA) but no micropower shutdown. | Select LM5088MHX/NOPB for cost-sensitive, high-volume 12V/5A applications where topology flexibility and ultra-fast line response are not required. |
Compared with LTC3775EFE#TRPBF and LM5088MHX/NOPB, the LT1074HVCT#06PBF uniquely combines integrated 5A Darlington switch, analog-multiplier-enhanced loop stability, and multi-topology capability (buck/inverting/negative-boost) in a single TO-220 package-making it optimal for space-constrained, high-reliability industrial converters where design simplicity and proven ruggedness outweigh marginal efficiency gains.
Availability
LT1074HVCT#06PBF is available at Aetrix Electronics and suitable for industrial DC-DC power supplies, telecom line card power, high-current LED drivers, and test equipment power modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT1074HVCT#06PBF 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 industrial, automotive, and communications applications.
The LT1074HVCT#06PBF belongs to Linear's HV (High-Voltage) monolithic switching regulator product line, designed specifically for robust, wide-input-voltage DC-DC conversion in harsh environments where reliability, thermal resilience, and topology flexibility are critical.
FAQ
What is the maximum input voltage rating for the LT1074HVCT#06PBF?
The LT1074HVCT#06PBF has an absolute maximum input voltage rating of 64V, with recommended continuous operation up to 60V. This HV variant exceeds the standard LT1074 (45V max) and enables use in 48V telecom, industrial, and automotive auxiliary power systems where transient spikes exceed 50V. Operation above 60V risks permanent damage even if within absolute maximum limits.
Can the LT1074HVCT#06PBF be used in a positive-to-negative inverting configuration?
Yes, the LT1074HVCT#06PBF supports positive-to-negative inverting operation due to its VSW pin's ability to swing up to 40V below ground. In this configuration, the device regulates a negative output (e.g., –5V) from a positive input (e.g., +24V), leveraging the same internal oscillator and current-limit circuitry. Application Note AN44 provides validated schematics and component selection guidelines for this topology.
How does the LT1074HVCT#06PBF implement current limiting, and can it be adjusted?
The LT1074HVCT#06PBF features internal pulse-by-pulse current limiting triggered by switch current sensing, with a default trip point of 6.5A when the ILIM pin is left open. Current limit is fully adjustable from 0A to 6.5A using an external resistor from ILIM to GND (RLIM = ILIM × 2kΩ + 1kΩ). This enables precise matching to load requirements and supports foldback limiting with an additional feedback resistor.
What is the purpose of the frequency downshifting feature in the LT1074HVCT#06PBF?
Frequency downshifting in the LT1074HVCT#06PBF automatically reduces switching frequency from 100kHz to ~20kHz when the FB pin voltage drops below 1.3V-indicating very low or shorted output. This extends minimum on-time to maintain stable current control during severe overload, preventing erratic behavior or thermal runaway that would occur if fixed 100kHz operation continued at sub-microsecond duty cycles.
Does the LT1074HVCT#06PBF require external compensation, and what is the role of the VC pin?
Yes, the LT1074HVCT#06PBF requires external RC compensation connected between the VC pin and GND to stabilize the control loop. The VC pin is the error amplifier output; its asymmetrical drive capability (140µA source / 1.1mA sink) minimizes startup overshoot. Proper RC values set dominant pole and zero locations to ensure phase margin >45° across line, load, and temperature variations per AN44 design procedures.
LT1074HVCT#06PBF 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:
- 5.5A (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 6
LT1074HVCT#06PBF FAQ
1.How can I place an order for LT1074HVCT#06PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1074HVCT#06PBF 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 LT1074HVCT#06PBF reliable?
The price and inventory of LT1074HVCT#06PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1074HVCT#06PBF is usually 5 days.
3.What payment methods are accepted for LT1074HVCT#06PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1074HVCT#06PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1074HVCT#06PBF?
LT1074HVCT#06PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1074HVCT#06PBF 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 LT1074HVCT#06PBF?
For technical support, including LT1074HVCT#06PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1074HVCT#06PBF requirements.
6.How does Aetrix verify that LT1074HVCT#06PBF is sourced from the original manufacturer or authorized distributors?
All LT1074HVCT#06PBF 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 LT1074HVCT#06PBF meets industry standards.
7.What is the process for return or replacement of LT1074HVCT#06PBF?
All LT1074HVCT#06PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1074HVCT#06PBF, 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 LT1074HVCT#06PBF part is unused and in its original packaging.
Return procedure for LT1074HVCT#06PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1074HVCT#06PBF 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…
