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Analog Devices Inc. LT1070HVIT#06PBF
- Part No.:
- LT1070HVIT#06PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1070HVIT#06PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,176
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Product details
Overview
LT1070HVIT#06PBF from Analog Devices (formerly Linear Technology) is a monolithic high-efficiency 5A switching regulator IC with integrated 75V breakdown switch, designed for buck, boost, flyback, forward, inverting, and Cuk topologies. It operates from 3V to 60V input, delivers up to 100W output power without external switches, and features 40kHz fixed-frequency current-mode control. Used in off-line converters, battery upconverters, and isolated dual-polarity supplies.
For engineers reviewing the LT1070HVIT#06PBF datasheet, LT1070HVIT#06PBF pinout, LT1070HVIT#06PBF application, or LT1070HVIT#06PBF equivalent, key selection criteria include its 60V max input rating, 5A internal switch current limit, flyback regulation mode enabling fully floating outputs, and TO-220-5 package compatibility with thermal design constraints in industrial power supplies.
Technical Context
The LT1070HVIT#06PBF implements current-mode switching: the 40kHz oscillator initiates each cycle, and the internal 5A switch turns off when sensed current reaches the VC-pin–controlled threshold. This provides inherent cycle-by-cycle overcurrent protection and excellent line/load transient response without external compensation complexity.
It integrates adaptive antisaturation drive for the power switch, minimizing driver loss across wide load ranges, and includes dual error amplifiers-one for standard regulation and a dedicated flyback amplifier activated via FB pin voltage ≤0.54V-enabling optocoupler-free isolated output regulation with transformer-coupled feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V - supports wide-range industrial, automotive, and off-line inputs without external pre-regulation. |
| Switch Current Limit | 5A typical (TJ ≥ 25°C, duty ≤ 50%) - enables high-power DC/DC conversion up to ~100W with no external MOSFET. |
| Switch Breakdown Voltage | 75V - allows safe operation with 60V input plus transient margin in buck or flyback configurations. |
| Quiescent Supply Current | 6mA typical - ensures low standby loss in always-on systems; drops to 50µA in shutdown mode. |
| Reference Voltage (FB) | 1.244V ±20mV - precision bandgap reference enabling accurate output voltage setting with standard resistor dividers. |
| Flyback Reference Voltage | 16.3V typical (IFB = 50µA) - sets regulated flyback pulse amplitude for isolated output control without optocouplers. |
| Shutdown Threshold (VC) | 100–250mV - precise low-voltage enable/disable control compatible with microcontroller GPIOs or logic-level signals. |
Pinout & Package
LT1070HVIT#06PBF is housed in a 5-lead plastic TO-220 (T-package) with exposed tab electrically connected to GND for thermal and EMI performance. The tab must be mounted to a heatsink with appropriate isolation if chassis ground is not GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary supply input (3V–60V); connects to bulk capacitor and input filter; requires local 1µF ceramic bypass. |
| VSW | Switch Output | Drains internal 5A/75V N-channel switch; connects directly to inductor/diode node in all topologies. |
| GND | Ground Reference | Analog and power ground common point; ties to heatsink tab; critical for noise immunity and stability. |
| FB | Feedback Input | Senses output voltage divider; <0.45V selects flyback mode; 1.244V target enables standard regulation. |
| VC | Error Amplifier Output / Control | Current-source output (gm ≈ 4400 µmho); sets switch current limit, enables soft-start, and triggers shutdown below 0.15V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A/75V Power Switch | Eliminates external MOSFET in ≤100W designs, reducing BOM count and layout area while maintaining thermal control via TO-220 tab. |
| Flyback Regulation Mode | Enables fully floating, transformer-isolated outputs without optocouplers or extra windings-ideal for medical or dual-rail industrial supplies. |
| Adaptive Antisaturation Drive | Dynamically adjusts gate drive to minimize switch saturation loss across 0–5A loads, preserving efficiency at light and heavy loads. |
| Current-Mode Control | Provides inherent cycle-by-cycle current limiting, simplified loop compensation, and superior line transient rejection vs. voltage-mode controllers. |
| Shutdown Mode (50µA) | Reduces system standby power significantly-suitable for battery-backed or energy-sensitive applications requiring ultra-low quiescent operation. |
Applications
| Off-Line AC/DC Converter | Battery-Powered Upconverter |
|---|---|
|
Use Scenario: Converting rectified 85–265VAC (via bridge + bulk cap) to regulated 12V/5A for industrial control modules. IC Role / Device Role / Timing Role: Primary-side controller in discontinuous conduction mode (DCM) flyback topology; regulates output by sensing reflected flyback pulse amplitude at FB pin. Use Value: Eliminates optocoupler and TL431, reducing component count by ≥4 parts and improving long-term reliability in harsh environments. |
Use Scenario: Boosting 12V lead-acid battery to 24V for vehicle-mounted instrumentation during engine-off periods. IC Role / Device Role / Timing Role: High-current boost controller with internal 5A switch; operates in continuous conduction mode (CCM) with 40kHz fixed frequency. Use Value: Delivers full 5A output at >90% efficiency down to 10V input, extending usable battery range by 22% vs. discrete-switch alternatives. |
| Dual-Polarity Lab Supply | Isolated Industrial Sensor Interface |
|
Use Scenario: Generating ±15V rails from a single 24V input for op-amp signal conditioning in test equipment. IC Role / Device Role / Timing Role: Inverting buck-boost controller; uses VSW as virtual ground node to derive negative output referenced to system GND. Use Value: Achieves tight cross-regulation (<±3%) between ±15V outputs using single IC and shared magnetics-no secondary regulators needed. |
Use Scenario: Powering isolated analog sensors (e.g., 4–20mA transmitters) in hazardous-area process control cabinets. IC Role / Device Role / Timing Role: Flyback controller with reinforced isolation barrier; regulates secondary-side 5V/1A output via primary-side sensing. Use Value: Meets IEC 61000-4-5 surge immunity and creepage/clearance requirements without additional isolation components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3703-5 | External MOSFET driver (no internal switch); 60V max VIN; 500kHz sync capability. | Requires external high-side FET and gate driver; better suited for >200W or high-frequency designs needing lower EMI. | Select when higher efficiency at light loads or programmable frequency is required; not drop-in due to external switch dependency. |
| LM5009AMMX/NOPB | Internal 75V/1.5A switch; 500kHz fixed frequency; smaller SOIC-8 package. | Lower current rating limits output to ~30W; lacks flyback regulation mode and adaptive antisat. | Choose for space-constrained, lower-power applications where flyback isolation is unnecessary and board area is premium. |
Compared with LTC3703-5 and LM5009AMMX/NOPB, the LT1070HVIT#06PBF uniquely combines 5A internal switching, 60V input, and optocoupler-free flyback regulation in a thermally robust TO-220 package-making it optimal for cost-sensitive, medium-power isolated or non-isolated industrial supplies where design simplicity and proven ruggedness are prioritized.
Availability
LT1070HVIT#06PBF is available at Aetrix Electronics and suitable for off-line AC/DC converters, battery-powered upconverters, and isolated industrial sensor interfaces requiring stable component supply across extended temperature and lifecycle demands.
Supply support for LT1070HVIT#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 full technical and manufacturing continuity for legacy Linear power products including the LT1070 family.
The LT1070HV series was designed for high-reliability industrial and off-line power conversion, emphasizing ruggedness, wide input range, and topology flexibility without sacrificing ease of use or thermal manageability.
FAQ
What is the maximum input voltage rating for the LT1070HVIT#06PBF?
The LT1070HVIT#06PBF has an absolute maximum supply voltage rating of 60V, confirmed in the Absolute Maximum Ratings table. Its internal switch breakdown voltage is rated at 75V, providing sufficient margin for transient spikes in 48V or off-line-derived 60V bus applications. Operation above 60V risks permanent damage and is not supported.
Does the LT1070HVIT#06PBF support flyback topology with isolated outputs?
Yes, the LT1070HVIT#06PBF supports flyback regulation mode: pulling the FB pin below 0.54V disconnects the main error amplifier and activates the dedicated flyback amplifier. This allows regulation of transformer-reflected voltage without optocouplers or secondary-side components-enabling fully floating, isolated outputs up to the transformer's breakdown rating.
What thermal considerations apply to the LT1070HVIT#06PBF in TO-220 package?
The LT1070HVIT#06PBF in T-package has θJA = 75°C/W (no heatsink) and θJC = 2°C/W (junction-to-case). For reliable 5A operation at 60V input, a minimum 15 cm² copper pour with thermal vias to inner layers is recommended. Mounting the exposed tab to a heatsink (electrically isolated if needed) reduces junction temperature rise by >40°C under full load.
Can the LT1070HVIT#06PBF be synchronized to an external clock?
No-the LT1070HVIT#06PBF uses a fixed 40kHz internal oscillator with no external synchronization pin or frequency adjustment capability. The datasheet notes "Can be Externally Synchronized (Consult Factory)" only for custom versions; the standard LT1070HVIT#06PBF does not support external sync and must operate at its nominal 35–45kHz switching frequency.
How does the LT1070HVIT#06PBF implement current limiting?
The LT1070HVIT#06PBF uses peak current-mode control: the internal switch turns off when sensed current reaches a threshold set by the VC pin voltage (transconductance ≈ 4400 µmho). This provides per-cycle limiting, eliminating need for external sense resistors. At 5A switch current, VC ≈ 1.2V; clamping VC externally adjusts the current limit dynamically.
LT1070HVIT#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, Cuk, Flyback, Forward Converter
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 75V (Switch)
- Current - Output:
- 5A (Switch)
- Frequency - Switching:
- 40kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5 Flow 6
LT1070HVIT#06PBF FAQ
1.How can I place an order for LT1070HVIT#06PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1070HVIT#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 LT1070HVIT#06PBF reliable?
The price and inventory of LT1070HVIT#06PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1070HVIT#06PBF is usually 5 days.
3.What payment methods are accepted for LT1070HVIT#06PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1070HVIT#06PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1070HVIT#06PBF?
LT1070HVIT#06PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1070HVIT#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 LT1070HVIT#06PBF?
For technical support, including LT1070HVIT#06PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1070HVIT#06PBF requirements.
6.How does Aetrix verify that LT1070HVIT#06PBF is sourced from the original manufacturer or authorized distributors?
All LT1070HVIT#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 LT1070HVIT#06PBF meets industry standards.
7.What is the process for return or replacement of LT1070HVIT#06PBF?
All LT1070HVIT#06PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1070HVIT#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 LT1070HVIT#06PBF part is unused and in its original packaging.
Return procedure for LT1070HVIT#06PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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