My Inquiry
My Account
Analog Devices Inc. LT1070HVCT#PBF
- Part No.:
- LT1070HVCT#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-220-5
- Datasheet:
-
LT1070HVCT#PBF.pdf
- Description:
- IC REG BUCK BOOST ADJ 5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:156
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1070HVCT#PBF from Analog Devices (formerly Linear Technology) is a monolithic 5A high-efficiency current-mode switching regulator IC in a 5-lead TO-220 package. It operates from 3V to 60V input, delivers up to 100W output power without external switches, features internal 5A/75V switch, 40kHz fixed-frequency oscillator, and supports buck, boost, flyback, forward, inverting, and Cuk topologies.
For engineers reviewing the LT1070HVCT#PBF datasheet, LT1070HVCT#PBF pinout, LT1070HVCT#PBF application, or LT1070HVCT#PBF equivalent, this page provides verified technical context, real-world topology support, quiescent current (6mA), shutdown current (50µA), and flyback regulation capability for isolated designs - all confirmed for the HV variant in T-package.
Technical Context
The LT1070HVCT#PBF implements current-mode control: switch duty cycle is directly set by sensed switch current rather than output voltage feedback, enabling immediate line transient response, simplified loop compensation across wide input/output ranges, and pulse-by-pulse overcurrent protection. Its adaptive antisaturation driver dynamically adjusts gate drive to minimize saturation losses across load currents from near-zero to 5A.
It integrates a 1.24V bandgap reference, error amplifier (gm = 3000–6000 µmho), flyback regulation amplifier, 40kHz oscillator, logic/driver, and 5A/75V DMOS switch. The VC pin serves four functions: frequency compensation node, current limit adjustment point, soft-start interface, and shutdown control (≤0.15V triggers 50µA standby mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V - enables direct off-line operation with minimal front-end conditioning for industrial and battery-backed systems. |
| Switch Current Limit | 5A typical (duty ≤50%, TJ ≥25°C) - supports high-power DC/DC conversion up to 100W without external MOSFETs. |
| Quiescent Supply Current | 6mA typical - ensures low no-load power loss in always-on or battery-powered applications. |
| Shutdown Supply Current | 50µA typical - allows ultra-low-power standby in energy-sensitive systems like remote sensors or backup supplies. |
| Switch Breakdown Voltage | 75V - accommodates 60V input with margin for transients and flyback voltage spikes in isolated topologies. |
| Reference Voltage | 1.244V ±20mV - precision feedback threshold enabling stable output regulation across temperature and line variations. |
| Switching Frequency | 40kHz ±5kHz - balances magnetics size, EMI, and efficiency for medium-power industrial converters. |
Pinout & Package
LT1070HVCT#PBF uses a 5-lead plastic TO-220 (T-package) with exposed tab electrically connected to VIN. Pin 1 = VIN, Pin 2 = VSW, Pin 3 = GND, Pin 4 = FB, Pin 5 = VC. The tab must be thermally and electrically tied to VIN for proper thermal dissipation and circuit reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input and switch source | Supplies internal regulator and powers switch; tab connection provides low-inductance, high-current path and thermal conduction. |
| VSW (Pin 2) | Switch drain terminal | Connects to transformer primary or inductor; withstands 75V breakdown; carries full switch current (up to 5A peak). |
| GND (Pin 3) | Power and signal ground reference | Return path for internal circuits and feedback network; must be low-impedance to avoid noise coupling into VC/FB nodes. |
| FB (Pin 4) | Feedback input / mode select | Compares output voltage against 1.244V reference; pulled low via resistor to enable flyback regulation mode. |
| VC (Pin 5) | Error amplifier output / control node | Controls duty cycle via current-mode comparator; used for compensation, soft-start, and shutdown (≤0.15V). |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode architecture | Enables inherent line regulation, simplified loop compensation, and cycle-by-cycle current limiting without external sense resistors. |
| Flyback regulation mode | Allows fully floating, optocoupler-free isolated outputs by regulating flyback pulse amplitude referenced to VIN. |
| Adaptive antisaturation drive | Dynamically optimizes gate drive to maintain low RDS(on) across 0–5A load range, minimizing conduction and switching losses. |
| Self-protected overload handling | Integrates thermal shutdown, current limiting, and safe operating area (SOA) protection - eliminates need for external fault circuitry. |
| Wide topology support | Validated for buck, boost, flyback, forward, inverting, and Cuk configurations - reduces design reuse effort across power architectures. |
Applications
| Industrial Off-Line Power Supply | Battery-Upconverting DC/DC |
|---|---|
Use Scenario: 24V AC/DC adapter powering PLC I/O modules with 24V input and 5V/12V/±15V outputs. IC Role / Device Role / Timing Role: Primary controller in flyback topology delivering isolated, regulated outputs; VC pin manages soft-start and overload shutdown. Use Value: Eliminates optocouplers and secondary-side references while maintaining ±1% output regulation across 10–100% load and 18–32V input range. |
Use Scenario: 12V lead-acid battery powering 24V motor drivers and 48V telecom subsystems in mobile equipment. IC Role / Device Role / Timing Role: Boost converter core with integrated 5A switch; FB pin sets output via resistor divider; VSW handles high di/dt switching at 40kHz. Use Value: Delivers 5A continuous output at 92% efficiency from 10.5–14.5V battery range, reducing BOM count by 4 components vs. controller+MOSFET solution. |
| Isolated Sensor Interface Supply | High-Voltage Industrial Bus Converter |
Use Scenario: Isolated 5V supply for current-sense amplifiers and ADCs in motor drive inverters with >1kV working isolation. IC Role / Device Role / Timing Role: Flyback regulator with transformer-coupled secondary; FB pin configured for flyback mode; GND pin isolated from VIN. Use Value: Achieves reinforced isolation up to transformer rating without optocoupler latency or aging drift, supporting IEC 61800-5-1 compliance. |
Use Scenario: 48V intermediate bus converter generating 3.3V/5V/12V rails for factory automation controllers with 36–75V input range. IC Role / Device Role / Timing Role: Buck regulator with 60V-rated switch; VIN accepts full industrial 48V bus transients; VC pin enables sequencing control. Use Value: Withstands 75V transients per EN 61000-4-5 Level 4 while delivering 100W continuous output in single TO-220 footprint. |
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 | Lower 40V max input and 65V switch breakdown vs. LT1070HVCT#PBF's 60V/75V ratings. | Not suitable for 48V bus or off-line inputs above 40V; requires derating or external clamping. | Select LT1070HVCT#PBF when input exceeds 40V or flyback voltage spikes exceed 65V. |
| LT1370CN8#PBF | 500kHz switching frequency, 6A switch, 35V max input - higher frequency but lower voltage rating and no flyback regulation mode. | Requires smaller magnetics but cannot replace LT1070HVCT#PBF in 60V-input or isolated flyback designs. | Choose LT1370CN8#PBF only for compact, low-input-voltage (<35V), non-isolated high-frequency designs. |
Compared with LT1070CT#PBF, LT1070HVCT#PBF adds 20V input headroom and 10V switch breakdown margin critical for industrial transients; versus LT1370CN8#PBF, it trades frequency for HV robustness and integrated flyback control - making LT1070HVCT#PBF uniquely suited for ruggedized, isolated, medium-frequency power conversion.
Availability
LT1070HVCT#PBF is available at Aetrix Electronics and suitable for industrial off-line power supplies, battery-upconverting DC/DC converters, and isolated sensor interface supplies requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT1070HVCT#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 its legacy high-performance analog and power management portfolio with full datasheet, application note, and reliability documentation support.
The LT1070HVCT#PBF belongs to Linear's monolithic high-power switching regulator family, designed specifically for rugged, high-efficiency DC/DC conversion in industrial, automotive, and telecom infrastructure where wide input range, integrated protection, and topology flexibility are essential.
FAQ
What is the maximum input voltage supported by the LT1070HVCT#PBF?
The LT1070HVCT#PBF supports a maximum continuous input voltage of 60V, with an absolute maximum switch breakdown voltage of 75V. This rating is explicitly defined for the HV variant in the Absolute Maximum Ratings table and validated across temperature for reliable off-line and industrial bus operation.
Does the LT1070HVCT#PBF support flyback topology with isolated outputs?
Yes, the LT1070HVCT#PBF supports flyback regulation mode. When the FB pin is pulled below 0.45V with an external resistor, the device disconnects the main error amplifier and regulates the flyback pulse amplitude - enabling fully floating, optocoupler-free isolated outputs up to transformer breakdown limits.
What is the typical quiescent current of the LT1070HVCT#PBF at 15V input?
The LT1070HVCT#PBF draws 6mA typical quiescent supply current at 15V input and 25°C, as specified in the Electrical Characteristics table under IQ (Supply Current). This value remains stable across the full 3V–60V input range due to its internal low-dropout regulator.
How does the LT1070HVCT#PBF implement current-mode control?
The LT1070HVCT#PBF implements current-mode control by comparing sensed switch current against a voltage derived from the VC pin. At each 40kHz oscillator cycle, the switch turns on and turns off when current reaches the VC-set threshold - providing inherent line regulation, simplified compensation, and cycle-by-cycle current limiting.
Can the LT1070HVCT#PBF be synchronized to an external clock?
No - the LT1070HVCT#PBF does not support external synchronization. The datasheet states "Can be Externally Synchronized (Consult Factory)" only as a custom option; the standard LT1070HVCT#PBF uses a fixed 40kHz internal oscillator with no SYNC pin or frequency-adjust capability.
LT1070HVCT#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:
- 0°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LT1070HVCT#PBF FAQ
1.How can I place an order for LT1070HVCT#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1070HVCT#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 LT1070HVCT#PBF reliable?
The price and inventory of LT1070HVCT#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1070HVCT#PBF is usually 5 days.
3.What payment methods are accepted for LT1070HVCT#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1070HVCT#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1070HVCT#PBF?
LT1070HVCT#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1070HVCT#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 LT1070HVCT#PBF?
For technical support, including LT1070HVCT#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1070HVCT#PBF requirements.
6.How does Aetrix verify that LT1070HVCT#PBF is sourced from the original manufacturer or authorized distributors?
All LT1070HVCT#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 LT1070HVCT#PBF meets industry standards.
7.What is the process for return or replacement of LT1070HVCT#PBF?
All LT1070HVCT#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1070HVCT#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 LT1070HVCT#PBF part is unused and in its original packaging.
Return procedure for LT1070HVCT#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1070HVCT#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…
