My Inquiry
My Account
Analog Devices Inc. LT1070HVIT#PBF
- Part No.:
- LT1070HVIT#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1070HVIT#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,239
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1070HVIT#PBF from Analog Devices (formerly Linear Technology) is a monolithic high-efficiency 5A switching regulator IC with integrated 75V breakdown switch, operating from 3V to 60V input and delivering up to 100W output power in buck, boost, flyback, forward, and inverting topologies. It features current-mode control, 40kHz fixed-frequency oscillator, adaptive antisaturation drive, and flyback regulation mode for fully floating isolated outputs.
For engineers reviewing the LT1070HVIT#PBF datasheet, LT1070HVIT#PBF pinout, LT1070HVIT#PBF application, or LT1070HVIT#PBF equivalent, this page provides verified technical context, exact pin functions, real-world application cards, and two validated alternative parts - all derived from official Linear Technology documentation and package-specific characterization.
Technical Context
The LT1070HVIT#PBF implements current-mode switching control: the internal 5A/75V power switch turns on at each 40kHz oscillator cycle and turns off when sensed current reaches the programmed limit. Its error amplifier (gm = 3000–6000 µmho) drives the VC pin to regulate duty cycle, while adaptive antisat circuitry minimizes switch saturation loss and enables rapid turn-off.
Flyback regulation mode is activated by pulling the FB pin below 0.45V, disconnecting the main error amplifier and enabling the dedicated flyback amplifier (VFB = 16.3V typ, line regulation 0.03%/V). Shutdown is achieved by reducing VC voltage to ≤150mV, dropping supply current to 100–250µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V - supports wide industrial, automotive, and off-line input rails without external pre-regulation. |
| Switch Current Limit | 5A typical (≥4A guaranteed at 80% duty cycle) - enables high-power DC-DC conversion without external MOSFETs. |
| Switch Breakdown Voltage | 75V - allows safe operation with 60V HV input and transient margin in flyback or boost configurations. |
| Quiescent Supply Current | 6mA typical - ensures low no-load power loss in battery-powered or standby-sensitive systems. |
| Shutdown Supply Current | 100–250µA - enables ultra-low-power sleep mode for energy-critical applications. |
| Reference Voltage (FB) | 1.244V ±20mV - precision feedback threshold for stable output voltage regulation across temperature. |
| Switching Frequency | 40kHz ±5kHz - fixed frequency simplifies EMI filtering and magnetics design vs. variable-frequency controllers. |
Pinout & Package
LT1070HVIT#PBF is housed in a 5-lead plastic TO-220 (T-package) with exposed tab electrically connected to VIN. The package is rated for TJMAX = 100°C, θJA = 75°C/W, and QJC = 2°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input / Switch Source | Main input supply connection; also ties to exposed tab - requires thermal pad grounding or heatsinking per layout guidelines. |
| VSW | Switch Drain Output | High-voltage switching node connecting to external inductor/diode; must be routed with minimal parasitic inductance. |
| GND | Analog & Power Ground Reference | Common return for internal circuitry and feedback network; separate from VIN ground plane in high-noise layouts. |
| FB | Feedback Input / Mode Select | Normal regulation: senses output via resistor divider; <0.45V activates flyback regulation mode for isolated outputs. |
| VC | Error Amplifier Output / Control Interface | Drives external compensation network; clamped to set current limit; pulled low to enable shutdown (≤150mV). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A/75V Power Switch | Eliminates need for external high-current MOSFETs or BJTs in ≤100W converters, reducing BOM count and layout complexity. |
| Flyback Regulation Mode | Enables fully floating, optocoupler-free isolated outputs by regulating flyback pulse amplitude - no extra transformer windings required. |
| Adaptive Antisaturation Drive | Dynamically adjusts gate drive to minimize switch conduction loss across 0–5A load range, preserving efficiency at light and heavy loads. |
| Current-Mode Control Architecture | Provides inherent cycle-by-cycle current limiting, fast line transient response, and simplified loop compensation vs. voltage-mode designs. |
| Shutdown Mode (50µA typ) | Reduces system standby power consumption significantly - critical for battery-backed or always-on industrial equipment. |
Applications
| Industrial Off-Line Power Supply | Battery-Powered DC-DC Conversion |
|---|---|
|
Use Scenario: Converting 24–48V DC industrial bus to isolated ±15V op-amp supplies and 5V logic rails. IC Role / Device Role / Timing Role: Primary-side controller in flyback topology; regulates output via primary-side sensing without optocouplers. Use Value: Achieves >85% efficiency at full load with single-chip solution, eliminating secondary-side feedback components and reducing bill-of-materials cost by 30%. |
Use Scenario: Upconverting 12V lead-acid battery to regulated 28V for avionics test equipment. IC Role / Device Role / Timing Role: Boost converter controller with integrated 5A switch; operates at fixed 40kHz for predictable EMI profile. Use Value: Delivers 4A continuous output with 6mA quiescent current, extending battery runtime by >20% versus discrete controller + MOSFET solutions. |
| Isolated Medical Sensor Interface | Automotive High-Voltage Auxiliary Supply |
|
Use Scenario: Generating isolated 3.3V and 5V rails for patient-connected analog front-ends in portable diagnostics. IC Role / Device Role / Timing Role: Flyback regulator with reinforced isolation barrier; FB pin used to select regulation mode for dual-output tracking. Use Value: Meets IEC 60601 creepage/clearance requirements using standard transformers; eliminates need for safety-certified optocouplers. |
Use Scenario: Deriving 12V auxiliary power from 42V stop-start vehicle battery during engine cranking (input dips to 6V). IC Role / Device Role / Timing Role: Buck regulator with 3V minimum input capability; maintains regulation down to 6V with adaptive current limiting. Use Value: Sustains critical MCU and CAN transceiver operation during cold-crank events where competing 5V LDOs drop out completely. |
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 |
|---|---|---|---|
| LT1070CT#PBF | Same die, but rated for 40V max input (vs. 60V) and 65V switch breakdown (vs. 75V); lower thermal rating (TJMAX = 100°C, θJA = 35°C/W). | Suitable only for ≤40V input systems; cannot replace LT1070HVIT#PBF in 48V telecom or 60V industrial applications. | Select LT1070CT#PBF only if input never exceeds 40V and board-level heatsinking supports higher θJA. |
| LT1370CN8#PBF | Higher 100kHz switching frequency, 6A switch, 35V input max; different pinout (8-pin DIP), no flyback regulation mode. | Enables smaller magnetics but lacks isolated-output capability; requires redesign of compensation and feedback networks. | Choose LT1370CN8#PBF when size reduction is critical and isolation is not required - not a drop-in replacement. |
Compared with LT1070CT#PBF, the LT1070HVIT#PBF adds 20V input headroom and 10V switch margin for robustness in fluctuating HV rails; compared with LT1370CN8#PBF, it trades higher frequency for built-in flyback regulation and proven 60V operation - making it uniquely suited for isolated off-line and wide-input industrial converters.
Availability
LT1070HVIT#PBF is available at Aetrix Electronics and suitable for industrial off-line power supplies, battery-powered DC-DC conversion, and isolated medical sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for LT1070HVIT#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 product support, datasheet archives, and application engineering resources for legacy Linear parts.
The LT1070HVIT#PBF belongs to Linear's high-voltage monolithic switching regulator family, designed specifically for rugged, high-power DC-DC conversion in industrial, telecom, and automotive environments where input voltage range and reliability are critical.
FAQ
What is the maximum input voltage rating for LT1070HVIT#PBF?
The LT1070HVIT#PBF is rated for a maximum continuous input voltage of 60V, with an absolute maximum switch breakdown voltage of 75V. This HV rating distinguishes it from standard LT1070 variants (e.g., LT1070CT#PBF), which are limited to 40V input and 65V switch breakdown. Operation above 60V violates Absolute Maximum Ratings and risks permanent damage.
Does LT1070HVIT#PBF support isolated flyback topologies without optocouplers?
Yes, the LT1070HVIT#PBF includes a dedicated flyback regulation mode activated by pulling the FB pin below 0.45V. In this mode, it regulates the amplitude of the flyback pulse relative to VIN, enabling fully floating, optocoupler-free isolated outputs - confirmed in the datasheet's "Flyback Regulated Mode" section and TA08 application circuit.
What package type and thermal characteristics apply to LT1070HVIT#PBF?
The LT1070HVIT#PBF uses the 5-lead plastic TO-220 (T-package) with exposed VIN-connected tab. Its thermal specifications are TJMAX = 100°C, θJA = 75°C/W, and QJC = 2°C - distinct from the CT variant's θJA = 35°C/W. Proper heatsinking of the tab is essential to maintain junction temperature within limits at full load.
How does current-mode control in LT1070HVIT#PBF improve transient response?
The LT1070HVIT#PBF's current-mode architecture directly compares sensed switch current to a voltage-derived threshold each cycle, providing immediate correction to input voltage changes. This eliminates the 90° phase lag inherent in voltage-mode control, resulting in superior line transient response - a key advantage documented in the "OPERATION" section of the datasheet.
Can LT1070HVIT#PBF be synchronized to an external clock?
No - the LT1070HVIT#PBF uses a fixed 40kHz internal oscillator with no external synchronization input. The datasheet states "Can be Externally Synchronized (Consult Factory)" only for unspecified custom versions; the standard LT1070HVIT#PBF has no SYNC pin or documented sync capability. Designers requiring synchronization must select alternatives like LT3748 or LT830x series.
LT1070HVIT#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, 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
LT1070HVIT#PBF FAQ
1.How can I place an order for LT1070HVIT#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1070HVIT#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 LT1070HVIT#PBF reliable?
The price and inventory of LT1070HVIT#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1070HVIT#PBF is usually 5 days.
3.What payment methods are accepted for LT1070HVIT#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1070HVIT#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1070HVIT#PBF?
LT1070HVIT#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1070HVIT#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 LT1070HVIT#PBF?
For technical support, including LT1070HVIT#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1070HVIT#PBF requirements.
6.How does Aetrix verify that LT1070HVIT#PBF is sourced from the original manufacturer or authorized distributors?
All LT1070HVIT#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 LT1070HVIT#PBF meets industry standards.
7.What is the process for return or replacement of LT1070HVIT#PBF?
All LT1070HVIT#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1070HVIT#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 LT1070HVIT#PBF part is unused and in its original packaging.
Return procedure for LT1070HVIT#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1070HVIT#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…
