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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear + Switching

Analog Devices Inc. LT3570IFE#PBF

Name: LT3570IFE#PBF
Brand: Analog Devices Inc.
SKU: LT3570IFE#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LT3570IFE#PBF

Manufacturer:: Analog Devices Inc.

Category:: Voltage Regulators - Linear + Switching

Package:: 20-TSSOP (0.173", 4.40mm Width) Exposed Pad

Datasheet:: LT3570IFE#PBF.pdf

Description:: IC REG TRPL BUCK/BST/LNR 20TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,390

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Product details

Overview

LT3570IFE#PBF from Analog Devices is a multi-output power IC that integrates a step-down regulator, a step-up regulator, and an LDO controller in one device. It is intended for embedded power systems that need both buck and boost conversion from a wide input source while keeping the external power tree compact.

As part of the LT3570 family, LT3570IFE#PBF combines 1.5A switch-current buck and boost channels, adjustable outputs down to 0.8V, a programmable 500kHz to 2.1MHz oscillator, external synchronization, and a linear regulator controller for auxiliary rail generation. For engineers reviewing the LT3570IFE#PBF datasheet, LT3570IFE#PBF pinout, LT3570IFE#PBF application, or LT3570IFE#PBF equivalent, this device is widely used in automotive electronics, industrial supplies, buck-boost multi-rail designs, distributed power systems, and embedded control modules.

Technical Context

In mixed-voltage embedded systems, LT3570IFE#PBF operates as a combined buck, boost, and LDO-control solution. The buck channel can step down a high input rail, while the boost channel can generate a higher auxiliary rail or maintain a boosted supply when the input voltage is below the required output.

The 2.5V to 36V input range supports automotive, industrial, adapter, and distributed supply environments. Programmable frequency and synchronization support help designers choose between smaller magnetics, efficiency, and EMI placement when multiple switching supplies operate on the same board.

LT3570IFE#PBF is commonly used when a board needs positive buck and boost rails plus a post-regulated or auxiliary output, such as sensor bias, communication module supplies, automotive control boards, or industrial analog/digital power systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Device Type	Integrated buck regulator, boost regulator, and LDO controller.
Input Voltage Range	2.5V to 36V input range for wide embedded supply compatibility.
Buck Channel	Internal buck power switch with 1.5A current-limit class operation.
Boost Channel	Internal boost power switch with 1.5A current-limit class operation.
Output Voltage	Switching outputs adjustable down to 0.8V.
Switching Frequency	Programmable 500kHz to 2.1MHz and synchronizable up to 2.75MHz.
Package	IFE suffix indicates a 20-lead TSSOP package option.
Applications	Automotive, industrial, distributed power, and multi-rail embedded systems.

Pinout & Package

The LT3570IFE#PBF pinout separates buck switch pins, boost switch pins, input supply, feedback, compensation, frequency/synchronization, enable, and LDO-controller functions.

PCB layout should keep buck and boost current loops compact, route feedback nodes away from switching nodes, and provide low-impedance grounding for thermal and noise performance.

Pin / Function	PCB Design and Circuit Role
VIN	Input supply for internal control and regulator power stages.
SW Buck	Buck switching node connected to the step-down inductor.
SW Boost	Boost switching node connected to the step-up inductor.
FB Buck / FB Boost	Feedback nodes for regulating each switching output.
VC Pins	Compensation nodes for buck and boost loop stability.
RT / SYNC	Frequency programming or external synchronization input.
LDO Controller	Control connection for external linear regulator pass device.
GND	Ground return for control and power circuitry.

Key Features

Buck, boost, and LDO-control functions reduce multi-rail IC count.
2.5V to 36V input range supports automotive and industrial rails.
Programmable and synchronizable frequency supports EMI planning.
Outputs adjustable down to 0.8V support low-voltage logic rails.
Separate compensation pins allow loop tuning for different loads.
TSSOP package supports inspectable assembly for industrial designs.

Applications

Automotive Control Boards

Industrial Supplies

Use Scenario: Used in modules that need both stepped-down and boosted rails.

IC Role: Generates multiple regulated outputs from a variable vehicle supply.

Use Value: Improves integration while supporting wide input conditions.

Use Scenario: Used in PLCs, sensors, and control equipment.

IC Role: Creates buck and boost rails for analog and digital subsystems.

Use Value: Supports compact multi-output power conversion.

Distributed Power

Communication Modules

Use Scenario: Used on boards receiving a single intermediate bus voltage.

IC Role: Produces local rails above and below the bus level.

Use Value: Reduces the need for separate buck and boost ICs.

Use Scenario: Used in embedded communication and interface products.

IC Role: Supplies logic rails and auxiliary boosted rails.

Use Value: Helps maintain stable power across mixed loads.

Equivalent & Alternatives

When evaluating a LT3570IFE#PBF equivalent, engineers should compare buck and boost current capability, input range, output-voltage range, synchronization needs, package, and LDO-controller requirements.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LT3570EFE#PBF	Same LT3570 architecture in a different package option, with related buck, boost, and LDO-controller functions.	Used when package footprint or assembly preference differs but the same regulator architecture is desired.	Compare package, thermal path, and PCB footprint before substitution.
LT8582	Analog Devices dual switching regulator with different boost/inverting-oriented architecture and current capability.	Used when the design needs multiple switching outputs but not the exact LT3570 buck-plus-boost-plus-LDO structure.	Compare topology, switch rating, compensation, package, and output polarity needs.

Compared with LT3570EFE#PBF, LT3570IFE#PBF is selected when the IFE package and associated footprint are required. LT3570IFE#PBF vs LT8582 selection depends on whether the design needs the LT3570's combined buck, boost, and LDO-controller arrangement.

Quality

LT3570IFE#PBF should be sourced as original Analog Devices components through traceable supply channels. Quality checks may include package inspection, top-mark validation, solderability testing, moisture handling review, and electrical testing of buck and boost outputs.

Production validation should include buck and boost startup, loop stability, synchronization behavior, load transients, LDO-controller operation, thermal performance, and switching-node layout review.

Availability

LT3570IFE#PBF available at Aetrix Electronics and is suitable for automotive, industrial, distributed power, and embedded multi-output systems.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming package, input range, buck/boost current requirements, thermal constraints, lead time, and sourcing continuity helps improve manufacturing stability.

Manufacturer

Analog Devices is a global semiconductor manufacturer specializing in analog ICs, power management, mixed-signal products, data converters, RF solutions, sensors, and embedded signal-chain technologies for industrial, communication, automotive, healthcare, and consumer applications.

The LT3570 product family is a multi-output regulator series integrating buck conversion, boost conversion, and LDO-control functions for wide-input systems that require compact multi-rail power generation.

FAQ

What is LT3570IFE#PBF used for?

LT3570IFE#PBF is used for automotive, industrial, communication, and embedded systems requiring both buck and boost regulated rails.

Where can I find the LT3570IFE#PBF datasheet download?

The LT3570IFE#PBF datasheet is available from Analog Devices and includes regulator operation, pin descriptions, electrical specifications, and application circuits.

What should be considered in LT3570IFE#PBF pinout design?

Buck and boost switching loops should be compact, feedback traces should avoid switch nodes, and compensation components should follow the intended output-load design.

Does LT3570IFE#PBF include both buck and boost regulators?

Yes. It integrates buck and boost switching regulator functions plus an LDO controller.

What are common LT3570IFE#PBF equivalent solutions?

Common candidates include LT3570EFE#PBF and LT8582 depending on topology, package, output current, and rail requirements.

LT3570IFE#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 20-TSSOP (0.173", 4.40mm Width) Exposed Pad

Packaging:: Tube

Product Status:: Active

Topology:: Step-Down (Buck) (1), Step-Up (Boost) (1), Linear (LDO) (1)

Number of Outputs:: 3

Frequency - Switching:: 500kHz ~ 2.1MHz

Voltage/Current - Output 1:: Adj to 0.8V, 1.5A

Voltage/Current - Output 2:: Adj to 0.8V, 1.5A

Voltage/Current - Output 3:: Controller

w/LED Driver:: No

w/Supervisor:: No

w/Sequencer:: No

Voltage - Supply:: 2.5V ~ 36V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP-EP

LT3570IFE#PBF FAQ

1.How can I place an order for LT3570IFE#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LT3570IFE#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 LT3570IFE#PBF reliable?

The price and inventory of LT3570IFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3570IFE#PBF is usually 5 days.

3.What payment methods are accepted for LT3570IFE#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3570IFE#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LT3570IFE#PBF?

LT3570IFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LT3570IFE#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 LT3570IFE#PBF?

For technical support, including LT3570IFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3570IFE#PBF requirements.

6.How does Aetrix verify that LT3570IFE#PBF is sourced from the original manufacturer or authorized distributors?

All LT3570IFE#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 LT3570IFE#PBF meets industry standards.

7.What is the process for return or replacement of LT3570IFE#PBF?

All LT3570IFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3570IFE#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 LT3570IFE#PBF part is unused and in its original packaging.

Return procedure for LT3570IFE#PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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