My Inquiry
My Account
Analog Devices Inc. LTC3862IGN#TRPBF
- Part No.:
- LTC3862IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3862IGN#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,001
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3862IGN#TRPBF from Analog Devices is a two-phase, constant-frequency, peak current mode boost/SEPIC DC/DC controller driving N-channel MOSFETs for high-efficiency step-up conversion. It operates from 4V to 36V input, delivers up to 96% max duty cycle, supports 75kHz–500kHz adjustable switching frequency, and features internal 5V/3.8V LDOs with UVLO. It enables automotive-grade power supplies delivering 48V output at 5A.
For engineers reviewing the LTC3862IGN#TRPBF datasheet, LTC3862IGN#TRPBF pinout, LTC3862IGN#TRPBF application, or LTC3862IGN#TRPBF equivalent, key selection criteria include multi-phase synchronization capability (2-/3-/4-/6-/12-phase via SYNC/CLKOUT/PHASEMODE), programmable leading edge blanking (180–340ns), adjustable slope compensation gain, ±1% reference accuracy, and AEC-Q100 qualification for I-grade (–40°C to 125°C) operation.
Technical Context
The LTC3862IGN#TRPBF implements fixed-frequency peak current mode control with dual independent channels operating 180° out of phase, reducing input/output ripple and filter component stress. Its error amplifier drives the ITH pin to set peak inductor current, while internal 5V and 3.8V LDOs independently power gate drivers and analog/digital circuitry - preventing cross-regulator loading in multi-phase configurations.
Phase relationships are precisely controlled via PHASEMODE (0V/float/3.8V → 180°/180°/120° CH1–CH2), and synchronization uses an internal PLL accepting 50kHz–650kHz external clocks on SYNC. DMAX programming (SGND/float/3.8V → 96%/84%/75%) derives from a 12× internal clock, ensuring tight duty cycle accuracy across temperature and line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4V to 36V - supports wide-input industrial and automotive battery systems without pre-regulation. |
| Switching Frequency | 75kHz to 500kHz (adjustable via FREQ resistor) - balances efficiency, size, and EMI in space-constrained designs. |
| Max Duty Cycle | Up to 96% (DMAX = SGND) - enables high step-up ratios (e.g., 12V→48V) with minimal conduction loss. |
| Reference Voltage | ±1% accuracy (1.223V typ) - ensures stable output regulation under load and line transients. |
| Gate Drive | 5V logic-level drive (RDS(ON) = 2.1Ω pull-up / 0.7Ω pull-down) - directly interfaces with low-QG MOSFETs like HAT2266. |
| Operating Temp | –40°C to +125°C (I-grade) - qualified per AEC-Q100 for under-hood automotive applications. |
| Package | 24-lead narrow SSOP (GN) - thermally enhanced for high-power density with θJA = 85°C/W. |
Pinout & Package
Package: 24-lead narrow plastic SSOP (GN24), 0.25mm lead pitch, exposed pad not present (unlike TSSOP/QFN variants). Thermal resistance θJA = 85°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DMAX (Pin 1) | Duty cycle limit control | Connect to SGND/float/3.8V to set 96%/84%/75% max on-time - critical for stability in high-VOUT/low-VIN boost. |
| PHASEMODE (Pin 4) | Inter-channel timing selector | Configures CH1–CH2 phase offset (180°/180°/120°) and CH1–CLKOUT relationship (90°/60°/240°) for scalable multi-phase layouts. |
| GATE1/GATE2 (Pins 16,18) | N-MOSFET gate drivers | 5V outputs referenced to PGND - drive logic-level MOSFETs directly; each rated –0.3V to 6V absolute max. |
| SENSE1+/SENSE2+ (Pins 23,13) | Current sense inputs | Differential inputs to peak current comparators - connect across low-side sense resistors (e.g., 6mΩ) for accurate cycle-by-cycle limiting. |
| INTVCC (Pin 19) | 5V gate driver LDO output | Supplies gate drivers; requires ≥4.7µF X5R ceramic bypass to PGND - not to be paralleled in multi-phase systems. |
| 3V8 (Pin 24) | 3.8V analog/digital LDO output | Powers internal control circuits; bypassed with 1nF ceramic to SGND - isolated from INTVCC to prevent noise coupling. |
| RUN (Pin 21) | Enable control with hysteresis | 1.22V threshold with 80mV hysteresis - enables clean start-up/shutdown; internal 0.5µA pull-up + 4.5µA hysteresis current. |
Key Features
| Feature | Design Value |
|---|---|
| Two-phase interleaved operation | Reduces input/output capacitor RMS current by ~70% vs single-phase - cuts bulk capacitance and ESR requirements. |
| Programmable leading edge blanking | Selectable 180ns (SGND), 260ns (float), or 340ns (3.8V) blanking - suppresses gate-drive-induced current-sense noise during turn-on. |
| Adjustable slope compensation gain | SLOPE pin sets normalized gain: 0.625× (SGND), 1.0× (float), or 1.66× (3.8V) - stabilizes current mode control across duty cycles. |
| Multi-phase synchronization | SYNC input + CLKOUT output + PHASEMODE pin enable precise daisy-chaining of 2/3/4/6/12 phases - eliminates beat frequencies and improves thermal distribution. |
| AEC-Q100 qualified I-grade | Rated –40°C to +125°C junction temperature with full electrical characterization - meets automotive reliability and lifetime requirements. |
Applications
| Automotive 48V Mild Hybrid Systems | Industrial Telecom Power Supplies |
|---|---|
Use Scenario: Boosting 12V battery rail to regulated 48V for e-turbo, ADAS cameras, and infotainment subsystems. IC Role / Device Role / Timing Role: Two-phase boost controller managing parallel MOSFETs with synchronized gate drive and current sharing. Use Value: Reduces input capacitor count by 50% and achieves >94% efficiency at 5A/48V - meeting stringent automotive thermal and EMC targets. | Use Scenario: Generating isolated 48V intermediate bus from 24V/36V industrial DC input for PoE++ switches and base station RF modules. IC Role / Device Role / Timing Role: High-reliability SEPIC controller supporting wide VIN range and programmable soft-start for hot-swap compatibility. Use Value: ±1% reference and 75–500kHz frequency tuning enable precise output regulation and EMI spread-spectrum optimization. |
| Medical Imaging Power Modules | Test & Measurement Equipment |
Use Scenario: Providing low-noise, tightly regulated 48V bias for CCD/CMOS sensor arrays and high-voltage amplifiers in portable ultrasound devices. IC Role / Device Role / Timing Role: Dual-channel current-mode controller with precision RUN threshold (1.22V ±80mV hysteresis) for sequenced power-up. Use Value: 180° phase shift minimizes input ripple, enabling smaller input filters - critical for compact, battery-powered medical enclosures. | Use Scenario: Stepping up lab-grade 5V/12V bench supplies to 48V for powering high-speed ADC/DAC evaluation boards and FPGA I/O banks. IC Role / Device Role / Timing Role: Programmable boost controller with adjustable max duty cycle (75–96%) and leading edge blanking for clean transient response. Use Value: 96% max duty cycle supports 5V→48V conversion in single-stage topology - eliminating cascaded converters and reducing BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost/SEPIC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3862-1IGN#TRPBF | Higher INTVCC UVLO (7.5V rising) and RUN threshold (1.22V same); optimized for standard-threshold MOSFETs. | Required when using 10V-gate MOSFETs instead of logic-level types; not drop-in compatible due to different biasing. | Select only if driving VGS(th) > 3V MOSFETs; incompatible with 5V gate drive requirement of LTC3862IGN#TRPBF. |
| LTC3891IGN#TRPBF | Single-phase, integrated 5V/3.3V LDOs, no PHASEMODE/SYNC/CLKOUT; supports wider VIN (4.5V–60V). | Used in simpler, lower-cost boost designs where multi-phase scaling and synchronization are unnecessary. | Choose for cost-sensitive, non-automotive applications needing higher VIN tolerance but sacrificing phase scalability. |
Compared with LTC3862-1IGN#TRPBF and LTC3891IGN#TRPBF, the LTC3862IGN#TRPBF uniquely combines AEC-Q100 I-grade qualification, two-phase interleaving, and full synchronization capability - making it the only option for scalable, automotive-compliant 48V boost systems requiring precise thermal and EMI management.
Availability
LTC3862IGN#TRPBF is available at Aetrix Electronics and suitable for automotive 48V mild hybrid systems, industrial telecom power supplies, and medical imaging equipment requiring stable component supply, extended temperature operation, and AEC-Q100 compliance.
Supply support for LTC3862IGN#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 (now part of Analog Devices, Inc., a subsidiary of Analog Devices, Inc.) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC3862 product line delivers high-efficiency, multi-phase boost/SEPIC controllers targeting automotive, industrial, and telecom power systems requiring precise voltage regulation, thermal resilience, and synchronization scalability.
FAQ
What is the maximum achievable output voltage using LTC3862IGN#TRPBF in boost configuration?
The LTC3862IGN#TRPBF itself does not impose a hard upper limit on output voltage; it is constrained by external component ratings and layout. In typical applications, it reliably generates 48V output from 12V input with 96% max duty cycle. Higher outputs (e.g., 60V) are feasible with appropriate MOSFETs, diodes, and capacitors rated for the resulting stresses - but require careful attention to minimum on-time limitations and slope compensation stability.
Does LTC3862IGN#TRPBF support SEPIC topology, and what design considerations apply?
Yes, LTC3862IGN#TRPBF explicitly supports SEPIC operation per its datasheet description and typical application circuits. For SEPIC, both GATE1 and GATE2 drive active switches in series with coupled inductors, requiring matched current sensing and careful transformer/inductor coupling coefficient selection. The controller's dual-channel interleaved architecture maintains channel independence, enabling balanced current sharing between the two SEPIC legs.
How does the PHASEMODE pin affect timing in a 4-phase system using multiple LTC3862IGN#TRPBF ICs?
In a 4-phase system, three LTC3862IGN#TRPBF ICs are daisy-chained: the master uses PHASEMODE = float (180° CH1–CH2), and slaves use PHASEMODE = 0V (180°) or 3.8V (120°) combined with CLKOUT-to-SYNC routing to achieve 90° phase offsets. The PHASEMODE setting directly determines the relative alignment of CH1 edges and CLKOUT transitions - enabling precise 360°/N division without external timing ICs.
Can LTC3862IGN#TRPBF operate with only one channel enabled?
Yes, LTC3862IGN#TRPBF supports single-channel operation. Tie SENSE2+/SENSE2– to SGND and leave GATE2 unconnected or terminate with a small resistor. Channel 1 remains fully functional with all control features (soft-start, current limit, frequency setting). However, the second channel's quiescent current (~1.8mA) remains active, so efficiency at light loads is slightly reduced versus a dedicated single-phase controller.
What is the recommended PCB layout practice for the INTVCC and 3V8 bypass capacitors on LTC3862IGN#TRPBF?
Place a ≥4.7µF X5R ceramic capacitor between INTVCC and PGND - directly adjacent to Pin 19 and the exposed PGND pad (if applicable; GN package has no exposed pad, so route to nearest PGND pin). Place a 1nF X5R ceramic between 3V8 (Pin 24) and SGND - within 2mm of the pins. Never share these capacitors across multiple ICs; each LTC3862IGN#TRPBF must have its own dedicated bypass network to prevent ground bounce and regulator instability.
LTC3862IGN#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):
- 4V ~ 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
LTC3862IGN#TRPBF FAQ
1.How can I place an order for LTC3862IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3862IGN#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 LTC3862IGN#TRPBF reliable?
The price and inventory of LTC3862IGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3862IGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3862IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3862IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3862IGN#TRPBF?
LTC3862IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3862IGN#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 LTC3862IGN#TRPBF?
For technical support, including LTC3862IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3862IGN#TRPBF requirements.
6.How does Aetrix verify that LTC3862IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3862IGN#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 LTC3862IGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3862IGN#TRPBF?
All LTC3862IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3862IGN#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 LTC3862IGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC3862IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3862IGN#TRPBF 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…
