My Inquiry
My Account
Analog Devices Inc. LTC3862IGN-2#PBF
- Part No.:
- LTC3862IGN-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3862IGN-2#PBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,516
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3862IGN-2#PBF from Analog Devices (formerly Linear Technology) is a two-phase, constant-frequency, peak current mode boost/SEPIC DC/DC controller driving N-channel MOSFETs. It operates from 5.5V to 36V input, delivers up to 96% duty cycle, supports 75kHz–500kHz programmable switching frequency, and enables 2-/3-/4-/6-/12-phase synchronization via SYNC/CLKOUT/PHASEMODE for high-power telecom and industrial boost supplies.
For engineers reviewing the LTC3862IGN-2#PBF datasheet, LTC3862IGN-2#PBF pinout, LTC3862IGN-2#PBF application, or LTC3862IGN-2#PBF equivalent, key selection criteria include its dual-channel phase control, INTVCC UVLO thresholds (4.4V rising / 3.9V falling), ±1% reference accuracy, adjustable slope compensation, and 24-pin SSOP package with PGND-exposed thermal pad.
Technical Context
The LTC3862IGN-2#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 internal architecture includes cascaded LDOs: a 10V INTVCC regulator powering gate drivers and a 3.8V LDO supplying analog/digital circuitry, both with dedicated bypassing requirements.
Phase synchronization is achieved via an internal PLL accepting 50kHz–650kHz external clocks on SYNC, with CLKOUT enabling daisy-chained multi-phase systems. PHASEMODE pin voltage selects channel-to-channel (180°/180°/120°) and channel-to-CLKOUT (90°/60°/240°) phase relationships, while DMAX and SLOPE pins allow precise duty cycle (75%/84%/96%) and slope gain (0.625/1.0/1.66) programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Two-phase boost/SEPIC controller - enables interleaved operation to halve input/output capacitor RMS current and reduce EMI filtering burden. |
| Input Voltage Range | 5.5V to 36V - supports wide-range industrial and telecom inputs including 12V, 24V, and 32V bus systems. |
| Switching Frequency | 75kHz to 500kHz (resistor-programmable) - allows optimization of efficiency vs. size trade-offs in magnetics and capacitors. |
| Max Duty Cycle | 96% (DMAX = SGND) - enables high step-up ratios (e.g., 12V → 80V) without requiring excessive turns ratio or transformer saturation margin. |
| Reference Accuracy | ±1% over temperature - ensures stable output voltage regulation across –40°C to 125°C junction range for I-grade operation. |
| INTVCC UVLO | 4.4V (rising), 3.9V (falling) - protects gate drivers from insufficient bias during brown-in/brown-out, compatible with 6V-VGS MOSFETs. |
| Current Sense Threshold | 65mV to 85mV (typical 75mV) - sets peak inductor current limit with <±7mV inter-channel matching for balanced phase current sharing. |
Pinout & Package
Package: 24-lead narrow plastic SSOP (GN24), 0.25-inch lead pitch, exposed PGND pad (Pin 25) requiring solder connection to PCB for thermal and electrical performance (θJA = 85°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DMAX (Pin 1) | Maximum duty cycle control | SGND = 96%, float = 84%, 3V8 = 75% - sets hard upper limit on on-time to prevent inductor saturation or diode overstress. |
| PHASEMODE (Pin 4) | Interleaving phase configuration | SGND/float/3V8 selects CH1–CH2 phase offset (180°/180°/120°) and CH1–CLKOUT relationship (90°/60°/240°) for multi-phase scaling. |
| GATE1/GATE2 (Pins 16, 18) | N-channel MOSFET gate drivers | 10V rail-referenced outputs with 3Ω pull-up / 0.9Ω pull-down RDS(ON) - directly drives high-side boost switches without external level shifters. |
| SENSE1+/SENSE2+ (Pins 23, 13) | Positive current sense inputs | Accept low-side sense resistor signals; trip threshold set by ITH voltage - enables accurate per-phase current limiting and sharing. |
| INTVCC (Pin 19) | 10V gate driver supply output | Internally regulated LDO output requiring ≥4.7µF X5R ceramic bypass to PGND - powers gate drivers and must not be paralleled in multi-phase designs. |
| 3V8 (Pin 22) | 3.8V analog/digital supply output | Second-stage LDO powered from INTVCC; requires 1nF ceramic bypass to SGND - supplies error amp, comparators, and logic, not for external loads. |
Key Features
| Feature | Design Value |
|---|---|
| Two-phase interleaved control | Reduces input/output capacitor RMS current by ~30% versus single-phase, lowering thermal stress and enabling smaller bulk capacitance. |
| Programmable slope compensation | SLOPE pin (0.625/1.0/1.66 gain) stabilizes current mode loop at high duty cycles, preventing subharmonic oscillation in boost topologies. |
| Adjustable leading edge blanking | BLANK pin (210ns/290ns/375ns) suppresses gate-drive-induced noise on current sense path, improving reliability under fast-switching conditions. |
| Internal 10V/3.8V dual-LDO system | Eliminates need for external bias rails; INTVCC powers gate drivers, 3V8 powers precision analog blocks - simplifies BOM and layout. |
| Multi-phase synchronization support | SYNC input + CLKOUT output + PHASEMODE pin enable seamless expansion to 3-, 4-, 6-, or 12-phase systems without external timing ICs. |
Applications
| Telecom Power Conversion | Industrial High-Voltage Bias Supplies |
|---|---|
Use Scenario: Generating 48V or 80V from 12V/24V intermediate bus in 4G/5G base station RF power amplifiers. IC Role / Device Role / Timing Role: Two-phase boost controller managing interleaved gate drive timing and current sensing for parallel MOSFET stages. Use Value: Achieves >95% efficiency at 7A output while minimizing input capacitor ripple current and EMI emissions through phase cancellation. | Use Scenario: Providing stable 60V–100V bias for industrial PLC I/O modules, motor drivers, or sensor excitation circuits. IC Role / Device Role / Timing Role: SEPIC controller delivering non-inverting high-voltage output with input-to-output isolation capability and robust line/load regulation. Use Value: Maintains ±1% output accuracy over –40°C to 125°C using internal 1.223V reference and matched current sense thresholds. |
| Automotive LED Driver Power Stages | Test Equipment High-Voltage Sources |
Use Scenario: Driving high-brightness LED strings in commercial vehicle lighting where input varies from 9V (cold crank) to 16V (load dump). IC Role / Device Role / Timing Role: Boost controller with programmable UVLO (4.4V/3.9V) and soft-start ensuring reliable startup under wide VIN transients. Use Value: Prevents MOSFET gate underdrive during brownout by disabling operation below 3.9V INTVCC, avoiding shoot-through failures. | Use Scenario: Programmable DC source module requiring precise, low-noise 30V–80V output with fast transient response for semiconductor characterization. IC Role / Device Role / Timing Role: Current-mode controller with ITH-based loop compensation and ±1% FB reference enabling tight CV/CC regulation. Use Value: Delivers <1% load regulation and <0.1% line regulation via integrated error amplifier and precision feedback network. |
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#PBF | Higher INTVCC UVLO (7.5V/7.0V) and different RUN thresholds; optimized for logic-level MOSFETs. | Requires 7V+ gate drive; less suitable for 6V-VGS high-voltage MOSFETs used in 80V boost designs. | Select LTC3862IGN-2#PBF when using standard 6V-threshold N-channel MOSFETs and needing lower UVLO for wider input dropout margin. |
| LT8330EDD#PBF | Single-phase, 100V input, integrated 1.3A switch; no multi-phase sync or external MOSFET drive capability. | Targeted at lower-power (<5A), space-constrained applications; lacks channel matching and phase control. | Choose LTC3862IGN-2#PBF for >5A, high-efficiency, thermally managed multi-phase boost where external FETs and layout flexibility are required. |
Compared with LTC3862IGN-1#PBF, the LTC3862IGN-2#PBF offers lower UVLO thresholds enabling operation with degraded input rails, while versus LT8330EDD#PBF it provides scalable multi-phase control, higher output current capability, and design flexibility via external MOSFETs - critical for telecom and industrial power systems demanding redundancy and thermal distribution.
Availability
LTC3862IGN-2#PBF is available at Aetrix Electronics and suitable for telecom power conversion, industrial high-voltage bias supplies, and automotive LED driver power stages requiring stable component supply, extended temperature operation (–40°C to 125°C), and long-term lifecycle continuity.
Supply support for LTC3862IGN-2#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 legacy high-performance power management portfolio with rigorous qualification and long-term support.
The LTC3862 series is designed for high-efficiency, multi-phase boost and SEPIC DC/DC conversion in demanding environments such as telecom infrastructure, industrial automation, and test equipment where reliability, thermal management, and precise current sharing are essential.
FAQ
What is the operating temperature range for the LTC3862IGN-2#PBF?
The LTC3862IGN-2#PBF is rated for –40°C to 125°C junction temperature (I-grade). This specification is guaranteed across the full range, with thermal derating recommended above 125°C to maintain reliability. The SSOP package has θJA = 85°C/W, so board-level thermal design must ensure adequate copper area and airflow to meet this rating under maximum load.
How does the PHASEMODE pin affect multi-phase operation in the LTC3862IGN-2#PBF?
The PHASEMODE pin on the LTC3862IGN-2#PBF configures both channel-to-channel and channel-to-CLKOUT phase relationships: SGND sets 180°/90°, floating sets 180°/60°, and 3V8 sets 120°/240°. This enables flexible scaling to 2-, 3-, 4-, 6-, or 12-phase systems using daisy-chained CLKOUT signals - a core feature distinguishing the LTC3862IGN-2#PBF from single-phase controllers.
Can the INTVCC and 3V8 outputs of the LTC3862IGN-2#PBF power external circuitry?
No. The INTVCC (10V) output is intended solely for internal gate drivers and must be bypassed with ≥4.7µF ceramic to PGND; paralleling multiple INTVCC pins in multi-phase designs causes thermal imbalance. The 3V8 (3.8V) output powers only internal analog/digital blocks and requires a 1nF ceramic bypass to SGND - neither rail is rated for external load current.
What is the purpose of the BLANK pin on the LTC3862IGN-2#PBF, and how does it impact performance?
The BLANK pin on the LTC3862IGN-2#PBF sets leading-edge blanking time to suppress gate-drive-induced noise on the current sense path: SGND = 210ns, floating = 290ns, 3V8 = 375ns. This prevents false current-limit triggering during MOSFET turn-on, especially critical in high-dV/dt boost applications with fast-switching GaN or SiC devices.
Does the LTC3862IGN-2#PBF support synchronization to an external clock, and what are the valid frequency limits?
Yes, the LTC3862IGN-2#PBF supports PLL-based synchronization via the SYNC pin across 50kHz to 650kHz. The internal PLL locks to external clocks within this range, aligning GATE1's rising edge to the SYNC rising edge. This enables precise timing coordination across multiple phases or with system clocks - a key requirement for EMI reduction and deterministic power sequencing.
LTC3862IGN-2#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):
- 5.5V ~ 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
LTC3862IGN-2#PBF FAQ
1.How can I place an order for LTC3862IGN-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3862IGN-2#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 LTC3862IGN-2#PBF reliable?
The price and inventory of LTC3862IGN-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3862IGN-2#PBF is usually 5 days.
3.What payment methods are accepted for LTC3862IGN-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3862IGN-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3862IGN-2#PBF?
LTC3862IGN-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3862IGN-2#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 LTC3862IGN-2#PBF?
For technical support, including LTC3862IGN-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3862IGN-2#PBF requirements.
6.How does Aetrix verify that LTC3862IGN-2#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3862IGN-2#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 LTC3862IGN-2#PBF meets industry standards.
7.What is the process for return or replacement of LTC3862IGN-2#PBF?
All LTC3862IGN-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3862IGN-2#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 LTC3862IGN-2#PBF part is unused and in its original packaging.
Return procedure for LTC3862IGN-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3862IGN-2#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…
