My Inquiry
My Account
Analog Devices Inc. LTC3862HGN-1#PBF
- Part No.:
- LTC3862HGN-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3862HGN-1#PBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,795
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3862HGN-1#PBF 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 for high-voltage output power conversion. It operates from 8.5V to 36V input, delivers up to 96% duty cycle, supports 75kHz–500kHz adjustable switching frequency, and features internal 10V INTVCC and 3.8V LDOs. It is used in automotive and industrial telecom power supplies requiring stable high-voltage generation (e.g., 72V bus from 24V source).
For engineers reviewing the LTC3862HGN-1#PBF datasheet, LTC3862HGN-1#PBF pinout, LTC3862HGN-1#PBF application, or LTC3862HGN-1#PBF equivalent, key selection considerations include its H-grade (–40°C to 150°C junction), 24-lead narrow SSOP package, dual-phase interleaving capability, programmable phase relationship via PHASEMODE, and precise ±1% reference voltage with 1.223V FB threshold.
Technical Context
The LTC3862HGN-1#PBF implements a fixed-frequency, two-phase peak current mode control architecture with 180° channel interleaving to reduce input/output ripple and filter component stress. Its error amplifier compares FB against a 1.223V reference and drives ITH to modulate peak inductor current per cycle.
It integrates cascaded LDOs: a 10V INTVCC regulator (7.5V UVLO rising, 50mA max output) powers gate drivers, while a 3.8V LDO (powered from INTVCC) supplies analog/digital circuitry. Phase synchronization uses an internal PLL with SYNC/CLKOUT pins supporting 2-, 3-, 4-, 6-, or 12-phase expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 8.5V to 36V - supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| Switching Frequency | 75kHz to 500kHz - set by single external resistor on FREQ pin; enables optimization of size vs. efficiency trade-offs. |
| Max Duty Cycle | Up to 96% - achieved when DMAX tied to SGND; allows high step-up ratios (e.g., 24V → 72V) with minimal dropout loss. |
| Reference Voltage | 1.223V ±1% - high-precision FB threshold ensures accurate output voltage regulation across temperature and load. |
| INTVCC LDO | 10.0V ±0.5V - powers gate drivers directly; includes under-voltage lockout (7.5V rising, 7.0V falling) for MOSFET protection. |
| Operating Temp | –40°C to +150°C (H-grade) - qualified for under-hood automotive and high-ambient industrial environments. |
| Current Sense Threshold | 65mV to 90mV - programmable via SLOPE pin; enables stable operation with low-value sense resistors and high-side sensing. |
Pinout & Package
Package: 24-lead narrow plastic SSOP (GN24), 0.25mm lead pitch, exposed pad connected to PGND for thermal and electrical integrity. θJA = 85°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DMAX (Pin 1) | Duty cycle limit control | Tying to SGND sets max duty cycle to 96%; floating yields 84%; tying to 3V8 yields 75% - critical for preventing transformer saturation or overvoltage during transients. |
| GATE1 / GATE2 (Pins 18, 16) | N-channel MOSFET gate drivers | 10V gate drive referenced to PGND - sufficient for high-voltage Si or SiC MOSFETs; RDS(ON) = 3Ω pull-up / 0.9Ω pull-down ensures fast edge rates. |
| SENSE1+/SENSE2+ (Pins 23, 13) | Positive current sense inputs | Accept differential voltage across low-side sense resistors; trip threshold programmable via ITH and SLOPE - enables accurate peak current limiting per phase. |
| PHASEMODE (Pin 4) | Interleaving configuration | Selects CH1–CH2 phase offset: 180° (floating), 120° (tied to 3V8), or 180° (tied to SGND); determines ripple cancellation effectiveness in multi-phase designs. |
| SYNC / CLKOUT (Pins 11, 10) | PLL synchronization interface | Accepts 50kHz–650kHz external clock on SYNC; outputs phase-aligned clock on CLKOUT - enables deterministic timing across multiple controllers in scalable power systems. |
Key Features
| Feature | Design Value |
|---|---|
| Two-phase interleaved operation | Reduces input/output capacitor RMS current by ~30% and cuts EMI peak amplitude - lowers BOM cost and simplifies filtering in high-power boost converters. |
| Programmable leading-edge blanking | Adjustable minimum on-time (210ns–375ns via BLANK pin) - suppresses gate-drive-induced noise spikes during MOSFET turn-on, improving current-sense reliability. |
| Internal 10V LDO with UVLO | Ensures robust gate drive even during VIN brownouts; 7.5V/7.0V hysteresis prevents oscillation near UVLO threshold - critical for automotive cold-crank immunity. |
| Adjustable slope compensation gain | SLOPE pin selects normalized gain of 0.625×, 1.0×, or 1.66× - stabilizes current-mode control across wide duty cycles and inductance variations. |
| Precision RUN pin threshold | 1.22V enable threshold with 80mV hysteresis - enables clean, noise-immune power sequencing and system-level enable/disable control. |
Applications
| Automotive ADAS Power Supply | Industrial Telecom 48V/72V Bus |
|---|---|
Use Scenario: Generating stable 72V rail from 12V vehicle battery for radar modules and camera sensors under cold-crank (6.5V) and load-dump (40V) conditions. IC Role / Device Role / Timing Role: Two-phase boost controller managing interleaved power stages; provides synchronized gate drive and precise current limiting per phase. Use Value: 150°C H-grade rating ensures operation in engine bay; 96% max duty cycle maintains regulation at low VIN; dual-phase reduces input capacitance by >40%. | Use Scenario: Up-converting 24V industrial DC bus to 72V for PoE++ infrastructure or optical line cards requiring high-voltage bias rails. IC Role / Device Role / Timing Role: Constant-frequency current-mode controller coordinating two parallel boost channels with 180° phase shift and shared feedback loop. Use Value: Interleaving cuts output ripple by 50%, enabling smaller output caps; SYNC/CLKOUT allows seamless scaling to 4- or 6-phase systems without redesign. |
| High-Voltage Test Equipment | Avionics Power Conversion |
Use Scenario: Programmable DC source generating 30–80V outputs from 28V aircraft supply, requiring low-noise, tightly regulated voltage with fast transient response. IC Role / Device Role / Timing Role: SEPIC controller implementing non-inverting topology with soft-start, programmable DMAX, and precision 1.223V reference. Use Value: ±1% reference and <±0.01%/V line regulation ensure <0.5% output error across input range; adjustable slope compensation maintains stability with variable inductors. | Use Scenario: Converting 270VDC main bus to isolated 28V/72V auxiliary rails in fly-by-wire systems where reliability and extended temperature operation are mandatory. IC Role / Device Role / Timing Role: Dual-phase boost controller operating in harsh thermal environment; leverages internal 10V LDO and PGND-exposed pad for thermal management. Use Value: –40°C to +150°C qualification meets DO-160 environmental requirements; exposed PGND pad enables direct thermal coupling to heatsink or copper pour. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3862IGN-1#PBF | I-grade (–40°C to 125°C), same pinout and electrical specs except lower max junction temp. | Suitable for non-under-hood industrial use where ambient ≤125°C; lacks H-grade thermal margin. | Select when full 150°C operation is unnecessary and cost sensitivity favors I-grade. |
| LTC3862HUH-1#PBF | Same H-grade temp range but in 5mm × 5mm QFN (UH24) package with θJA = 44°C/W vs. GN24's 85°C/W. | Better thermal performance in space-constrained layouts; requires different PCB footprint and reflow profile. | Choose for higher power density or improved thermal headroom; verify layout compatibility with QFN land pattern. |
Compared with LTC3862IGN-1#PBF, the LTC3862HGN-1#PBF adds 25°C junction margin for sustained high-temp operation; compared with LTC3862HUH-1#PBF, it trades thermal performance for legacy SSOP footprint compatibility and lower assembly cost in through-hole or mixed-technology boards.
Availability
LTC3862HGN-1#PBF is available at Aetrix Electronics and suitable for automotive ADAS power supplies, industrial telecom 72V bus generation, and avionics auxiliary power conversion requiring stable component supply and long-term lifecycle support.
Supply support for LTC3862HGN-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 continues its legacy of high-performance analog, power management, and signal conditioning ICs for demanding applications.
The LTC3862 family is designed as a two-phase, current-mode boost/SEPIC controller targeting high-reliability, high-voltage DC/DC conversion in automotive, industrial, and telecom infrastructure where thermal robustness and precise regulation are critical.
FAQ
What is the maximum operating junction temperature for the LTC3862HGN-1#PBF?
The LTC3862HGN-1#PBF is rated for an operating junction temperature range of –40°C to +150°C (H-grade). This specification is guaranteed across the full range, making it suitable for under-hood automotive and high-ambient industrial environments. Thermal design must ensure that power dissipation and board layout keep TJ within this limit, especially given its 85°C/W θJA in the GN24 SSOP package.
How does the PHASEMODE pin affect channel timing in the LTC3862HGN-1#PBF?
The PHASEMODE pin on the LTC3862HGN-1#PBF configures the phase relationship between Channel 1 and Channel 2 gate signals: floating or tied to SGND yields 180° offset, while tied to 3V8 yields 120° offset. It also sets CH1-to-CLKOUT phase (90°, 60°, or 240°). This enables optimized ripple cancellation and scalable multi-phase synchronization without external timing components.
Can the LTC3862HGN-1#PBF be used in SEPIC topology, and what design considerations apply?
Yes, the LTC3862HGN-1#PBF supports SEPIC operation using its two-phase current-mode architecture. Key considerations include connecting coupled inductors with correct polarity, configuring feedback to regulate VOUT instead of boost output, and ensuring slope compensation matches the SEPIC duty cycle range. The device's adjustable DMAX and SLOPE pins allow fine-tuning for stability across varying input/output ratios.
What is the purpose of the BLANK pin on the LTC3862HGN-1#PBF, and how does it impact minimum on-time?
The BLANK pin on the LTC3862HGN-1#PBF controls leading-edge blanking duration to suppress noise during MOSFET turn-on. Tying BLANK to SGND sets minimum on-time to 210ns, floating yields 290ns, and tying to 3V8 yields 375ns. This adjustment prevents false current-sense triggering and ensures reliable operation with fast-switching high-voltage MOSFETs or SiC devices.
Does the LTC3862HGN-1#PBF require external compensation, and where is the compensation network connected?
Yes, the LTC3862HGN-1#PBF requires external compensation on the ITH pin to stabilize the current-mode control loop. A Type II or Type III network (typically R-C-RC or R-C-CC) is connected between ITH and SGND. Compensation design depends on output filter characteristics, switching frequency, and desired bandwidth; Linear Technology Application Note AN140 provides detailed methodology specific to the LTC3862HGN-1#PBF.
LTC3862HGN-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- 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-SSOP
LTC3862HGN-1#PBF FAQ
1.How can I place an order for LTC3862HGN-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3862HGN-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 LTC3862HGN-1#PBF reliable?
The price and inventory of LTC3862HGN-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 LTC3862HGN-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3862HGN-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3862HGN-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3862HGN-1#PBF?
LTC3862HGN-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3862HGN-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 LTC3862HGN-1#PBF?
For technical support, including LTC3862HGN-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3862HGN-1#PBF requirements.
6.How does Aetrix verify that LTC3862HGN-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3862HGN-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 LTC3862HGN-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3862HGN-1#PBF?
All LTC3862HGN-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3862HGN-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 LTC3862HGN-1#PBF part is unused and in its original packaging.
Return procedure for LTC3862HGN-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3862HGN-1#PBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
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…
