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Analog Devices Inc. LTC3862HUH-1#TRPBF
- Part No.:
- LTC3862HUH-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-WQFN Exposed Pad
- Datasheet:
-
LTC3862HUH-1#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,507
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Product details
Overview
LTC3862HUH-1#TRPBF from Analog Devices (formerly Linear Technology) is a two-phase, constant-frequency, peak current mode boost and SEPIC DC/DC controller driving external N-channel MOSFETs. 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 for high-voltage MOSFETs - used in high-efficiency telecom power supplies delivering 72V at 2A.
For engineers reviewing the LTC3862HUH-1#TRPBF datasheet, LTC3862HUH-1#TRPBF pinout, LTC3862HUH-1#TRPBF application, or LTC3862HUH-1#TRPBF equivalent, key selection criteria include its 2-phase interleaved operation reducing input/output ripple, programmable phase relationship via PHASEMODE, ±1% reference accuracy, thermal grade H (–40°C to 150°C), and QFN-24 (5mm × 5mm) package with exposed PGND pad.
Technical Context
The LTC3862HUH-1#TRPBF implements a fixed-frequency, peak current mode control architecture with two independent channels operating 180° out of phase by default. Its error amplifier compares FB voltage against a 1.223V internal reference and drives ITH to modulate peak inductor current; slope compensation gain is programmable via SLOPE pin (0.625× to 1.66× nominal).
It features a cascaded LDO structure: a 10V INTVCC regulator (UVLO at 7.5V/7.0V) powers gate drivers, while a 3.8V 3V8 LDO (bypassed with 1nF) supplies analog/digital circuitry. Phase synchronization uses an internal PLL with SYNC input (50kHz–650kHz) and CLKOUT output, enabling 2-/3-/4-/6-/12-phase systems via PHASEMODE configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 8.5V to 36V - supports wide-input industrial and telecom battery/supply rails without pre-regulation. |
| Switching Frequency | 75kHz to 500kHz (adjustable via FREQ resistor) - enables optimization of size vs. efficiency in high-voltage boost designs. |
| Max Duty Cycle | Up to 96% (via DMAX pin grounded) - allows high step-up ratios (e.g., 12V→72V) with practical inductor sizing. |
| Reference Accuracy | ±1% over temperature - ensures stable output regulation across –40°C to 150°C junction range. |
| Gate Drive Voltage | 10V (INTVCC) - sufficient to fully enhance high-voltage N-channel MOSFETs (e.g., >100V VDS) with low RDS(on). |
| Thermal Grade | H-grade (–40°C to 150°C TJ) - qualified for under-hood automotive, base station, and high-ambient industrial environments. |
| Package | 24-pin 5mm × 5mm QFN (UH) with exposed PGND pad - provides low θJA = 44°C/W for thermally demanding multi-phase layouts. |
Pinout & Package
Package: 24-lead (5mm × 5mm) plastic QFN (UH), exposed thermal pad connected to PGND and requiring PCB soldering for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DMAX (Pin 1) | Duty cycle limit control | Ground → 96% max duty; float → 84%; 3V8 → 75% - enables precise overvoltage protection and loop stability tuning. |
| GATE1 / GATE2 (Pins 18, 16) | N-channel MOSFET gate drivers | 10V push-pull outputs referenced to PGND - drive high-side switches in boost/SEPIC without level shifters. |
| SENSE1+/SENSE1− / SENSE2+/SENSE2− (Pins 23,22,13,14) | Current sense inputs | Differential sensing per channel with ±10mV matching - enables accurate current balancing in 2-phase interleaved operation. |
| PHASEMODE (Pin 4) | Interleaving phase selector | SGND → 180° CH1–CH2; float → 180°; 3V8 → 120° - configures multi-phase timing for EMI reduction and capacitor stress sharing. |
| CLKOUT (Pin 10) | Phase-synchronized clock output | Drives SYNC of downstream LTC3862-1 ICs - enables deterministic daisy-chained multi-phase systems up to 12 phases. |
Key Features
| Feature | Design Value |
|---|---|
| Two-phase interleaved control | Reduces input/output RMS current by ~30%, cutting required capacitance and inductance size in high-power boost converters. |
| Programmable slope compensation | SLOPE pin adjusts gain (0.625× to 1.66×) - stabilizes current mode control across varying duty cycles and inductor values. |
| Internal 10V/3.8V dual-LDO system | Eliminates need for external bias supplies - INTVCC powers gate drivers; 3V8 powers precision analog circuitry with dedicated bypassing. |
| Leading edge blanking adjustment | BLANK pin selects 210ns/290ns/375ns minimum on-time - suppresses noise-induced false triggering during MOSFET turn-on transitions. |
| PLL-based synchronization | SYNC input accepts 50kHz–650kHz external clocks; CLKOUT aligns to GATE1 rising edge - enables coherent multi-rail or multi-board timing. |
Applications
| Telecom Base Station Power | Industrial High-Voltage Bias Supply |
|---|---|
Use Scenario: Generating stable 72V/2A output from 24V backplane supply in LTE macro base stations. IC Role / Device Role / Timing Role: Two-phase boost controller managing interleaved gate drive, current sensing, and thermal-aware duty cycle limiting. Use Value: 96% max duty cycle and 10V gate drive enable efficient high-ratio conversion; H-grade rating ensures reliability at 150°C junction temperature in sealed enclosures. | Use Scenario: Providing regulated 48V–80V bias for RF power amplifiers and sensor excitation in factory automation PLCs. IC Role / Device Role / Timing Role: SEPIC controller with programmable soft-start and leading edge blanking for robust startup under variable load conditions. Use Value: Adjustable slope compensation and ±1% reference maintain tight output regulation despite wide VIN (8.5V–36V) and temperature swings. |
| Automotive ADAS Camera Power | Medical Imaging HV Supply |
Use Scenario: Generating isolated 60V rail from 12V vehicle battery for high-resolution camera modules with EMI-sensitive image sensors. IC Role / Device Role / Timing Role: Interleaved boost controller using PHASEMODE and CLKOUT to synchronize with system clock and reduce conducted emissions. Use Value: 180° phase shift cuts input ripple current by 50%, relaxing input capacitor requirements and meeting CISPR-25 Class 5 limits. | Use Scenario: Supplying 72V at low noise for photomultiplier tube (PMT) bias in portable X-ray detectors. IC Role / Device Role / Timing Role: Precision current-mode controller with soft-start (SS pin) and programmable hysteresis (RUN pin) for controlled ramp-up and fault recovery. Use Value: 0.5µA RUN pull-up + 4.5µA hysteresis current enables clean enable/disable sequencing; ±1% reference ensures consistent PMT gain calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3862IUH-1#TRPBF | I-grade (–40°C to 125°C), identical electrical specs and pinout | Lower max junction temperature rating - suitable for non-under-hood automotive or industrial use below 125°C ambient | Select when full H-grade thermal margin is unnecessary and cost optimization is prioritized. |
| MP2492GQ-Z | Single-phase, 4.5V–60V input, integrated 100V MOSFETs, no multi-phase sync capability | Lacks interleaving, PLL sync, and external MOSFET drive flexibility - limited to lower-power (<100W) or space-constrained designs | Choose only for simple, low-component-count boost where 2-phase benefits are not required. |
Compared with LTC3862IUH-1#TRPBF and MP2492GQ-Z, the LTC3862HUH-1#TRPBF uniquely combines H-grade thermal robustness, 2-phase interleaving, and PLL-based multi-phase scalability - making it the only option qualified for continuous 150°C junction operation in mission-critical telecom and automotive power systems.
Availability
LTC3862HUH-1#TRPBF is available at Aetrix Electronics and suitable for telecom base station power, industrial high-voltage bias supplies, and automotive ADAS camera power requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3862HUH-1#TRPBF 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 high-performance power management portfolio with rigorous automotive and industrial qualification standards.
The LTC3862 family is designed for high-efficiency, high-voltage DC/DC conversion in telecom, industrial, and automotive applications - emphasizing multi-phase interleaving, precision current sensing, and extended temperature reliability.
FAQ
What is the maximum operating junction temperature for the LTC3862HUH-1#TRPBF?
The LTC3862HUH-1#TRPBF is rated for a maximum junction temperature of 150°C, confirmed by its H-grade qualification (–40°C to 150°C). This is validated through thermal characterization and lifetime testing per Analog Devices' industrial reliability standards, making it suitable for under-hood automotive and sealed telecom equipment where ambient temperatures exceed 100°C.
Does the LTC3862HUH-1#TRPBF support synchronization with an external clock source?
Yes, the LTC3862HUH-1#TRPBF supports external clock synchronization via its SYNC pin, accepting input frequencies from 50kHz to 650kHz. The internal PLL locks to the external signal, aligning GATE1's rising edge with the SYNC rising edge. This capability is essential for noise-sensitive systems and multi-rail power architectures requiring deterministic timing, as documented in the LTC3862-1 datasheet Figure 11 and Electrical Characteristics table.
How does the PHASEMODE pin affect channel timing in the LTC3862HUH-1#TRPBF?
The PHASEMODE pin on the LTC3862HUH-1#TRPBF sets the phase relationship between CH1 and CH2 gate signals: grounded → 180°, floating → 180°, and tied to 3V8 → 120°. It also determines CH1-to-CLKOUT phase (90°/60°/240° respectively). This programmability enables optimized EMI spreading and current sharing in 2-phase systems, directly verified in the Pin Functions section and Typical Application schematic of the LTC3862-1 datasheet.
What is the purpose of the DMAX pin on the LTC3862HUH-1#TRPBF?
The DMAX pin on the LTC3862HUH-1#TRPBF programs the maximum duty cycle: grounded → 96%, floating → 84%, tied to 3V8 → 75%. This feature prevents runaway duty cycles during transient overload or feedback faults, enhancing system safety. Its precision stems from an internal 12× oscillator, ensuring tight tolerance independent of external components - a design detail specified in the Applications Information section of the LTC3862-1 datasheet.
Can the LTC3862HUH-1#TRPBF be used in SEPIC topology configurations?
Yes, the LTC3862HUH-1#TRPBF explicitly supports SEPIC converter topologies, as stated in its product description and confirmed by the Typical Application circuit on page 1 of the LTC3862-1 datasheet. Its dual N-channel gate drivers, current-mode control, and wide VIN range (8.5V–36V) allow robust SEPIC operation for applications requiring non-inverting high-voltage outputs with input-to-output isolation - such as industrial sensor bias supplies.
LTC3862HUH-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC3862HUH-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3862HUH-1#TRPBF 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#TRPBF reliable?
The price and inventory of LTC3862HUH-1#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3862HUH-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3862HUH-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3862HUH-1#TRPBF?
LTC3862HUH-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3862HUH-1#TRPBF 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#TRPBF?
For technical support, including LTC3862HUH-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3862HUH-1#TRPBF requirements.
6.How does Aetrix verify that LTC3862HUH-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3862HUH-1#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3862HUH-1#TRPBF?
All LTC3862HUH-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3862HUH-1#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3862HUH-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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