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Analog Devices Inc. LTC3862HGN-1#TRPBF
- Part No.:
- LTC3862HGN-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3862HGN-1#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,672
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Product details
Overview
LTC3862HGN-1#TRPBF from Analog Devices (formerly Linear Technology) is a two-phase, constant-frequency, peak current mode boost and SEPIC DC/DC controller driving N-channel MOSFETs. It operates from 8.5V to 36V input, delivers up to 96% maximum duty cycle, features 10V gate drive, ±1% reference accuracy, and supports multi-phase synchronization up to 12 phases - used in high-voltage telecom power supplies requiring stable output at 72V.
For engineers reviewing the LTC3862HGN-1#TRPBF datasheet, LTC3862HGN-1#TRPBF pinout, LTC3862HGN-1#TRPBF application, or LTC3862HGN-1#TRPBF equivalent, key selection criteria include its H-grade (–40°C to 150°C) thermal rating, 24-lead narrow SSOP package, programmable slope compensation, adjustable leading edge blanking, and phase-lockable 75kHz–500kHz oscillator with external resistor tuning.
Technical Context
The LTC3862HGN-1#TRPBF implements a dual-channel, interleaved peak current mode control architecture with 180° phase shift between channels, reducing input/output ripple and filter component stress. Its internal 10V LDO powers gate drivers while a cascaded 3.8V LDO supplies analog/digital circuitry - both thermally isolated for stability in high-temperature operation.
Phase relationship is controlled via PHASEMODE pin (0V/float/3.8V), enabling 2-, 3-, 4-, 6-, or 12-phase configurations using SYNC/CLKOUT signals. The DMAX pin sets precise max duty cycle (75%/84%/96%), and SLOPE pin adjusts slope compensation gain (0.625×/1×/1.66×) to prevent subharmonic oscillation in boost/SEPIC topologies.
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. |
| Max Duty Cycle | 96% (DMAX = SGND) - enables high step-up ratios (e.g., 12V→72V) with minimal dropout loss. |
| Oscillator Range | 75kHz to 500kHz (resistor-programmable) - balances efficiency vs. size for magnetics and capacitors. |
| Reference Voltage | 1.223V ±1% - ensures tight output voltage regulation across temperature and load in feedback loop. |
| Gate Drive | 10V (INTVCC LDO) - directly drives high-voltage N-MOSFETs (e.g., 100V+ VDS) without external level-shifting. |
| Operating Temp | –40°C to +150°C (H-grade) - qualified for under-hood automotive, base station, and industrial environments. |
| Package | 24-lead narrow SSOP (GN24) - surface-mount, thermally enhanced layout with exposed pad tied to PGND. |
Pinout & Package
Package: 24-lead narrow plastic SSOP (GN24), 0.25mm lead pitch, exposed thermal pad (Pin 25) connected to PGND and required to be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DMAX (Pin 1) | Maximum duty cycle programming | SGND = 96%, float = 84%, 3V8 = 75% - sets hard limit on on-time to prevent transformer saturation or overvoltage. |
| GATE1 / GATE2 (Pins 18, 16) | N-channel MOSFET gate drivers | 10V push-pull outputs referenced to PGND - drive high-side switches in boost/SEPIC with low RDS(ON) turn-on/turn-off. |
| SENSE1+/SENSE2+ (Pins 23, 13) | Current sense positive inputs | Monitor source-side current through external sense resistors - trip threshold adjustable via ITH voltage (60–90mV range). |
| FREQ (Pin 5) | Oscillator frequency setting | Resistor-to-SGND sets fSW from 75kHz–500kHz - determines switching loss, EMI profile, and passive component sizing. |
| SYNC (Pin 11) | External clock synchronization input | Accepts 50kHz–650kHz external clock - aligns multiple controllers for coherent multi-phase operation and EMI reduction. |
| PHASEMODE (Pin 4) | Interleaving phase configuration | 0V/float/3V8 selects CH1–CH2 phase offset (180°/180°/120°) and CH1–CLKOUT relationship (90°/60°/240°) for scalable phase count. |
Key Features
| Feature | Design Value |
|---|---|
| Two-phase interleaved control | Reduces input/output RMS current by ~30%, cutting capacitor count and size in high-power boost converters. |
| Programmable slope compensation | SLOPE pin (float/3V8/SGND) sets gain to 1.0/1.66/0.625 - stabilizes current loop across duty cycles in boost/SEPIC. |
| Adjustable leading edge blanking | BLANK pin (SGND/float/3V8) sets min on-time to 210ns/290ns/375ns - suppresses gate-drive-induced noise during switch turn-on. |
| Internal 10V LDO with UVLO | 7.5V rising / 7.0V falling UVLO threshold - prevents unreliable gate drive during brown-out, protecting MOSFETs from partial conduction. |
| Precision RUN pin with hysteresis | 1.22V enable threshold with 80mV hysteresis - enables clean power sequencing and avoids chatter during supply ramp-up. |
Applications
| Telecom Power Supply | Industrial HV DC-DC Converter |
|---|---|
|
Use Scenario: Generating stable 72V output from 24V or 32V intermediate bus in LTE base station RF power amplifiers. IC Role / Device Role / Timing Role: Two-phase boost controller managing interleaved gate timing, current sensing, and synchronization across parallel stages. Use Value: Reduces output capacitor count by 40% versus single-phase design while maintaining <1% output ripple at 2A load. |
Use Scenario: High-reliability 48V-to-100V boost converter for factory automation sensors operating in ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: H-grade controller providing robust phase-shifted PWM generation, thermal shutdown, and precision reference under extended temperature stress. Use Value: Enables continuous operation at 150°C junction temperature with no derating - critical for sealed enclosures without forced air cooling. |
| Automotive Onboard Charger (OBC) Auxiliary Rail | Test Equipment High-Voltage Bias Supply |
|
Use Scenario: Generating isolated 60V auxiliary rail from 12V vehicle battery for OBC gate drivers and isolation ICs. IC Role / Device Role / Timing Role: SEPIC-mode controller supporting wide VIN transients (load dump, cold crank) while maintaining regulated output. Use Value: Maintains regulation during 8.5V–36V input swings and survives 40V transient spikes - meets ISO 16750-2 requirements. |
Use Scenario: Programmable 30–80V bias supply in semiconductor ATE systems requiring fast settling and low noise. IC Role / Device Role / Timing Role: Precision-controlled boost controller with soft-start, programmable max duty, and synchronous clocking for multi-unit coherence. Use Value: Achieves <0.1% output voltage drift over 8-hour test cycles via ±1% reference and low-drift error amplifier. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost/SEPIC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3862IGN-1#TRPBF | I-grade (–40°C to 125°C), same pinout and specs except lower max junction temperature. | Suitable for non-under-hood industrial use where 150°C rating is unnecessary. | Select when thermal margin is sufficient at 125°C and cost optimization is prioritized over extended temp capability. |
| LTC3862HUH-1#TRPBF | H-grade QFN (5mm × 5mm), θJA = 44°C/W vs. GN24's 85°C/W - superior thermal performance in space-constrained layouts. | Better suited for high-power density designs where board area and thermal resistance are critical. | Choose when PCB real estate is limited and thermal management requires lower junction rise per watt. |
Compared with LTC3862IGN-1#TRPBF and LTC3862HUH-1#TRPBF, the LTC3862HGN-1#TRPBF offers identical H-grade reliability in a legacy SSOP package optimized for manual rework and legacy assembly lines - ideal for long-lifecycle industrial programs where footprint compatibility matters more than thermal density.
Availability
LTC3862HGN-1#TRPBF is available at Aetrix Electronics and suitable for telecom power supplies, industrial HV DC-DC converters, and automotive auxiliary rail generation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3862HGN-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 full support for its high-performance power management portfolio, including precision DC/DC controllers and monolithic regulators.
The LTC3862 family was designed specifically for high-efficiency, high-voltage boost and SEPIC applications demanding multi-phase scalability, wide input range, and rugged thermal operation - targeting telecom infrastructure, industrial automation, and transportation systems.
FAQ
What is the maximum operating junction temperature for the LTC3862HGN-1#TRPBF?
The LTC3862HGN-1#TRPBF is rated for –40°C to +150°C operating junction temperature (H-grade). This specification is guaranteed across the full range, with thermal protection circuitry activating above 150°C to prevent permanent damage. Derating guidelines apply above 125°C for long-term reliability.
Does the LTC3862HGN-1#TRPBF support SEPIC topology in addition to boost?
Yes, the LTC3862HGN-1#TRPBF supports both boost and SEPIC topologies. Its dual-channel current-mode architecture, independent sense inputs (SENSE1±/SENSE2±), and flexible gate drive referencing to PGND allow direct implementation of SEPIC with coupled or uncoupled inductors - confirmed in the official application schematics and functional diagram.
How does the PHASEMODE pin affect multi-phase operation in the LTC3862HGN-1#TRPBF?
The PHASEMODE pin on the LTC3862HGN-1#TRPBF selects channel phase relationships: 0V sets 180° CH1–CH2 and 90° CH1–CLKOUT; float sets 180° and 60°; 3.8V sets 120° and 240°. This enables deterministic 2-, 3-, 4-, 6-, or 12-phase configurations when daisy-chaining multiple LTC3862HGN-1#TRPBF units via SYNC/CLKOUT.
What is the purpose of the BLANK pin on the LTC3862HGN-1#TRPBF?
The BLANK pin on the LTC3862HGN-1#TRPBF controls leading edge blanking time to suppress false current-sense triggering during MOSFET turn-on. Connecting BLANK to SGND sets 210ns blanking, float sets 290ns, and 3.8V sets 375ns - directly mitigating gate-drive-induced noise in high-dV/dt boost/SEPIC applications.
Can the LTC3862HGN-1#TRPBF synchronize to an external clock, and what is its valid frequency range?
Yes, the LTC3862HGN-1#TRPBF accepts external synchronization via the SYNC pin across 50kHz to 650kHz. The internal PLL locks to the rising edge of the external clock, aligning GATE1 timing. This allows precise EMI control and coherent multi-phase operation - verified in the Electrical Characteristics table and Typical Performance plots.
LTC3862HGN-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- 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-SSOP
LTC3862HGN-1#TRPBF FAQ
1.How can I place an order for LTC3862HGN-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3862HGN-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 LTC3862HGN-1#TRPBF reliable?
The price and inventory of LTC3862HGN-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 LTC3862HGN-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3862HGN-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3862HGN-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3862HGN-1#TRPBF?
LTC3862HGN-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3862HGN-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 LTC3862HGN-1#TRPBF?
For technical support, including LTC3862HGN-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3862HGN-1#TRPBF requirements.
6.How does Aetrix verify that LTC3862HGN-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3862HGN-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 LTC3862HGN-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3862HGN-1#TRPBF?
All LTC3862HGN-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3862HGN-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 LTC3862HGN-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3862HGN-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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