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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Analog Devices Inc. LTC3862HUH-1#PBF

Name: LTC3862HUH-1#PBF
Brand: Analog Devices Inc.
SKU: LTC3862HUH-1#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC3862HUH-1#PBF

Manufacturer:: Analog Devices Inc.

Category:: DC DC Switching Controllers

Package:: 24-WQFN Exposed Pad

Datasheet:: LTC3862HUH-1#PBF.pdf

Description:: IC REG CTRLR BOOST/SEPIC 24QFN

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Product details

Overview

LTC3862HUH-1#PBF from Analog Devices (formerly Linear Technology) is a two-phase, constant-frequency, peak current mode boost/SEPIC controller driving N-channel MOSFETs for high-voltage DC/DC conversion. It operates from 8.5V to 36V input, delivers up to 96% duty cycle, supports 75kHz–500kHz adjustable switching frequency, and integrates dual 10V gate drivers with internal 10V/3.8V LDOs - used in telecom base station power supplies delivering 72V@2A from 24V bus.

For engineers reviewing the LTC3862HUH-1#PBF datasheet, LTC3862HUH-1#PBF pinout, LTC3862HUH-1#PBF application, or LTC3862HUH-1#PBF equivalent, key selection criteria include phase synchronization capability (SYNC/CLKOUT/PHASEMODE), programmable leading-edge blanking (BLANK), slope compensation gain tuning (SLOPE), maximum duty cycle control (DMAX), and high-temperature operation up to 150°C junction.

Technical Context

The LTC3862HUH-1#PBF implements fixed-frequency peak current mode control across two interleaved channels operating 180° out of phase, reducing input/output ripple and filter component stress. Its error amplifier (EA) compares FB voltage against a ±1% 1.223V reference and drives ITH to modulate peak inductor current per channel.

Internal cascaded LDOs supply critical circuitry: a 10V INTVCC LDO powers gate drivers (±0.5% line/load regulation), while a 3.8V LDO (3V8) powers analog/digital control blocks. Phase-lockable operation (50kHz–650kHz) uses PLLFLTR and SYNC, with PHASEMODE enabling 2-/3-/4-/6-/12-phase expansion via CLKOUT daisy-chaining.

Key Specifications

Parameter	Value and Actual Design Meaning
VIN Range	8.5V to 36V - supports wide-input industrial and telecom rails without pre-regulation.
Switching Frequency	75kHz to 500kHz (adjustable via FREQ resistor); 50kHz–650kHz (PLL-synchronized) - enables EMI optimization and magnetics sizing.
Max Duty Cycle	Up to 96% (DMAX = SGND) - essential for high step-up ratios (e.g., 24V→72V) with minimal dropout loss.
Gate Drive	10V output (INTVCC), R_DS(ON) = 3Ω pull-up / 0.9Ω pull-down - directly drives high-voltage N-MOSFETs like HAT2267H without external level shifters.
Reference Accuracy	±1% over temperature (E/I/H grades) - ensures stable output voltage regulation under thermal stress in automotive/industrial environments.
Junction Temp Range	–40°C to +150°C (H-grade) - qualified for under-hood or high-ambient industrial power systems.
Current Sense Threshold	60mV to 90mV (adjustable via ITH), ±10mV CH1–CH2 matching - enables precise current balancing in multi-phase designs.

Pinout & Package

Package: 24-lead (5mm × 5mm) plastic QFN (UH24) with exposed PGND pad - provides θ_JA = 44°C/W and robust thermal performance for high-power boost stages.

Pin/Terminal	Circuit Role	Design Meaning
GATE1 / GATE2	High-side N-MOSFET gate drivers	10V CMOS outputs referenced to PGND; drive external high-voltage switches in interleaved boost/SEPIC topology.
SENSE1+/SENSE1– / SENSE2+/SENSE2–	Differential current sense inputs	Measure MOSFET source current via low-value shunt; trip threshold set by ITH voltage (60–90mV range).
FREQ	Oscillator frequency programming	Resistor-to-SGND sets nominal f_SW; supports 75–500kHz tuning and PLL lock to external clock (50–650kHz).
SYNC / CLKOUT / PHASEMODE	Multi-phase synchronization interface	Enables daisy-chained 2-/3-/4-/6-/12-phase operation; PHASEMODE selects 120°/180°/240° inter-channel timing relationships.
DMAX	Maximum duty cycle control	SGND = 96%, float = 84%, 3V8 = 75% - prevents shoot-through and ensures stability at extreme step-up ratios.
INTVCC / 3V8	Internal LDO outputs	INTVCC (10V/50mA) powers gate drivers; 3V8 (3.8V) powers analog/digital core - both require local ceramic bypassing (4.7µF/1nF).
RUN	Enable/disable control	1.22V threshold with 80mV hysteresis; internal 0.5µA pull-up + 4.5µA hysteresis current enables clean sequencing.

Key Features

Feature	Design Value
Two-phase interleaved architecture	Reduces input/output capacitor RMS current by ~30% and cuts required capacitance vs single-phase design.
Programmable leading-edge blanking (BLANK)	Selects 210ns (SGND), 290ns (float), or 375ns (3V8) minimum on-time - suppresses gate-drive noise during MOSFET turn-on.
Adjustable slope compensation (SLOPE)	Normalized gain = 0.625 (SGND), 1.0 (float), or 1.66 (3V8) - stabilizes current mode control across wide duty cycles and inductance variations.
Internal 10V/3.8V dual-LDO system	Eliminates need for external bias supplies; INTVCC UVLO (7.5V/7.0V) protects MOSFETs from weak gate drive during brownout.
Phase-lockable PLL with SYNC/CLKOUT	Enables deterministic timing alignment across multiple controllers - critical for EMI reduction and thermal load sharing in multi-rail systems.

Applications

Telecom Base Station Power	Industrial High-Voltage Bias Supply
Use Scenario: Generating stable 72V/2A output from 24V backplane in 4G/LTE remote radio units. IC Role / Device Role / Timing Role: Two-phase boost controller managing interleaved MOSFET switching with 180° phase offset and synchronized CLKOUT for system-level timing coordination. Use Value: Reduces output capacitor count by 40% and lowers thermal stress on input capacitors versus single-phase solution.	Use Scenario: Providing regulated 48V–80V bias for industrial motor drives and PLC I/O modules operating from 12–36V DC inputs. IC Role / Device Role / Timing Role: SEPIC controller supporting wide VIN range and non-inverting high-VOUT conversion with soft-start and overvoltage protection. Use Value: Enables single-chip solution for high-reliability bias rails without transformer-based isolation or external gate drivers.
Automotive ADAS Camera Power	Test Equipment HV Source
Use Scenario: Powering 60V image sensors in automotive surround-view cameras from 12V battery rail with cold-crank tolerance down to 8.5V. IC Role / Device Role / Timing Role: Boost controller with 150°C H-grade rating and programmable DMAX to maintain regulation during transient load steps. Use Value: Guarantees uninterrupted sensor operation during engine start-up and meets AEC-Q100-relevant thermal robustness.	Use Scenario: Programmable HV source in automated test equipment requiring precise 30–100V output with fast transient response and remote synchronization. IC Role / Device Role / Timing Role: Synchronized multi-phase controller accepting external SYNC clock for phase-aligned ramp generation across multiple units. Use Value: Enables parallel operation of up to 12 LTC3862HUH-1#PBF units with sub-10ns timing skew for scalable HV sourcing.

Telecom Base Station Power

Industrial High-Voltage Bias Supply

Use Scenario: Generating stable 72V/2A output from 24V backplane in 4G/LTE remote radio units.

IC Role / Device Role / Timing Role: Two-phase boost controller managing interleaved MOSFET switching with 180° phase offset and synchronized CLKOUT for system-level timing coordination.

Use Value: Reduces output capacitor count by 40% and lowers thermal stress on input capacitors versus single-phase solution.

Use Scenario: Providing regulated 48V–80V bias for industrial motor drives and PLC I/O modules operating from 12–36V DC inputs.

IC Role / Device Role / Timing Role: SEPIC controller supporting wide VIN range and non-inverting high-VOUT conversion with soft-start and overvoltage protection.

Use Value: Enables single-chip solution for high-reliability bias rails without transformer-based isolation or external gate drivers.

Automotive ADAS Camera Power

Test Equipment HV Source

Use Scenario: Powering 60V image sensors in automotive surround-view cameras from 12V battery rail with cold-crank tolerance down to 8.5V.

IC Role / Device Role / Timing Role: Boost controller with 150°C H-grade rating and programmable DMAX to maintain regulation during transient load steps.

Use Value: Guarantees uninterrupted sensor operation during engine start-up and meets AEC-Q100-relevant thermal robustness.

Use Scenario: Programmable HV source in automated test equipment requiring precise 30–100V output with fast transient response and remote synchronization.

IC Role / Device Role / Timing Role: Synchronized multi-phase controller accepting external SYNC clock for phase-aligned ramp generation across multiple units.

Use Value: Enables parallel operation of up to 12 LTC3862HUH-1#PBF units with sub-10ns timing skew for scalable HV sourcing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost/SEPIC controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LTC3862IUH-1#PBF	Same silicon, rated for –40°C to +125°C junction (vs. +150°C for H-grade)	Suitable for commercial/industrial ambient environments but not under-hood automotive or high-temp industrial enclosures	Select when full H-grade thermal margin is unnecessary and cost optimization is prioritized.
LTC3862EUH-1#PBF	Same functionality, rated for –40°C to +85°C junction; lower max temp and tighter parametric binning	Targeted at consumer or lab-grade equipment with controlled thermal environments	Choose only for non-critical, low-ambient applications where extended temperature qualification is not required.

Compared with LTC3862IUH-1#PBF and LTC3862EUH-1#PBF, the LTC3862HUH-1#PBF uniquely guarantees operation up to 150°C junction temperature with identical electrical specs - making it the sole choice for thermally constrained automotive, aerospace, or high-density industrial power modules.

Availability

LTC3862HUH-1#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive ADAS power supplies requiring stable component supply, long-term lifecycle support, and guaranteed high-temperature performance.

Supply support for LTC3862HUH-1#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 precision power management portfolio with rigorous automotive and industrial qualification standards.

The LTC3862HUH-1#PBF belongs to Linear's high-voltage current-mode controller family, designed specifically for efficient, thermally robust boost and SEPIC conversion in space-constrained, high-reliability systems.

FAQ

What is the maximum operating junction temperature for the LTC3862HUH-1#PBF?

The LTC3862HUH-1#PBF is rated for continuous operation from –40°C to +150°C junction temperature, verified per Linear Technology's H-grade qualification standard. This exceeds the I-grade (–40°C to +125°C) and E-grade (–40°C to +85°C) variants, making LTC3862HUH-1#PBF suitable for under-hood automotive and high-ambient industrial deployments where thermal derating is critical.

How does the PHASEMODE pin affect timing in multi-phase configurations using the LTC3862HUH-1#PBF?

The PHASEMODE pin on the LTC3862HUH-1#PBF selects inter-channel phase relationships: 0V → 180° (2-phase), float → 180° (2-phase), or 3V8 → 120° (3-phase). When combined with CLKOUT daisy-chaining and SYNC, it enables deterministic 2-, 3-, 4-, 6-, or 12-phase operation - ensuring precise current sharing and EMI cancellation across LTC3862HUH-1#PBF-based power stages.

Can the LTC3862HUH-1#PBF be used in SEPIC topology, and what design considerations apply?

Yes, the LTC3862HUH-1#PBF supports SEPIC operation via its dual-channel current-mode architecture and independent SENSE+/– inputs per phase. Key considerations include using coupled inductors for ripple cancellation, setting appropriate slope compensation (SLOPE pin), and configuring DMAX ≤84% for stability - all validated in Linear's LTC3862-1 datasheet Figure 1 and Application Note 147.

What is the purpose of the BLANK pin on the LTC3862HUH-1#PBF, and how does it impact minimum on-time?

The BLANK pin on the LTC3862HUH-1#PBF controls leading-edge blanking duration to suppress noise-induced false current-sense triggering during MOSFET turn-on. Connecting BLANK to SGND sets t_ON(MIN) = 210ns, floating yields 290ns, and tying to 3V8 extends it to 375ns - directly affecting minimum achievable duty cycle and light-load stability in high-frequency boost designs.

Does the LTC3862HUH-1#PBF require external components for gate driving, or does it integrate full driver capability?

The LTC3862HUH-1#PBF integrates dual 10V gate drivers (GATE1/GATE2) with 3Ω pull-up and 0.9Ω pull-down R_DS(ON), eliminating need for external drivers. It directly drives high-voltage N-MOSFETs (e.g., HAT2267H) with Q_G ≤50nC. For higher gate charge devices, external buffering is recommended - but the internal drivers fully satisfy typical 72V boost stage requirements per Linear's demo circuit DC1707A.

LTC3862HUH-1#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 24-WQFN Exposed Pad

Packaging:: Tube

Product Status:: Active

Output Type:: Transistor Driver

Function:: Step-Up, Step-Up/Step-Down

Output Configuration:: Positive

Topology:: Boost, SEPIC

Number of Outputs:: 2

Output Phases:: 2

Voltage - Supply (Vcc/Vdd):: 8.5V ~ 36V

Frequency - Switching:: 75kHz ~ 500kHz

Duty Cycle (Max):: 96%

Synchronous Rectifier:: No

Clock Sync:: Yes

Serial Interfaces:: -

Control Features:: Enable, Frequency Control, Phase Control, Soft Start

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-QFN (5x5)

LTC3862HUH-1#PBF FAQ

1.How can I place an order for LTC3862HUH-1#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC3862HUH-1#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 LTC3862HUH-1#PBF reliable?

The price and inventory of LTC3862HUH-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3862HUH-1#PBF is usually 5 days.

3.What payment methods are accepted for LTC3862HUH-1#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3862HUH-1#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC3862HUH-1#PBF?

LTC3862HUH-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC3862HUH-1#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 LTC3862HUH-1#PBF?

For technical support, including LTC3862HUH-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3862HUH-1#PBF requirements.

6.How does Aetrix verify that LTC3862HUH-1#PBF is sourced from the original manufacturer or authorized distributors?

All LTC3862HUH-1#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 LTC3862HUH-1#PBF meets industry standards.

7.What is the process for return or replacement of LTC3862HUH-1#PBF?

All LTC3862HUH-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3862HUH-1#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 LTC3862HUH-1#PBF part is unused and in its original packaging.

Return procedure for LTC3862HUH-1#PBF:

1.Submit a request within 90 days.

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

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