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Analog Devices Inc. LT8210IUJ#PBF
- Part No.:
- LT8210IUJ#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LT8210IUJ#PBF.pdf
- Description:
- 100V BUCK/BOOST CTLR WITH PASS-T
- Quantity:
- Payment:
- Shipping:
Inventory:141
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Product details
Overview
LT8210IUJ#PBF from Analog Devices is a 100V input/output 4-switch synchronous buck-boost DC/DC controller with programmable non-switching pass-thru mode, ±1.25% output voltage accuracy over –40°C to 125°C, 80kHz–400kHz adjustable switching frequency, and reverse input protection down to –40V. It enables high-efficiency power conversion in automotive start-stop and ISO 7637-compliant industrial systems.
For engineers reviewing the LT8210IUJ#PBF datasheet, LT8210IUJ#PBF pinout, LT8210IUJ#PBF application, or LT8210IUJ#PBF equivalent, key selection criteria include pass-thru window programming, 40-pin QFN thermal performance, gate driver capability for N-channel MOSFETs, current sense accuracy (±3%), and compliance with MIL-STD-1275 and DO-160 surge standards.
Technical Context
The LT8210IUJ#PBF implements dual-loop control: FB1 regulates boost-mode output (e.g., VOUT ≥ VIN), FB2 regulates buck-mode output (e.g., VOUT ≤ VIN), and both loops are active in buck-boost region. Pass-thru mode bypasses switching entirely when VIN falls within user-defined window, eliminating switching losses and EMI while maintaining 99.9% efficiency at light load.
Its GATEVCC regulator delivers 10.6V at up to 115mA from VINP or EXTVCC, with back-drive protection during input brownouts. The precision current sense amplifier monitors average input or output current via SNSP1/SNSN1 (inductor) or SNSP2/SNSN2 (output/input), supporting ±5% current regulation and cycle-by-cycle inductor current limiting with ±20% tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.8V to 100V (4.5V min for start-up); supports wide-input industrial and automotive battery systems. |
| VOUT Range | 1V to 100V; enables flexible output configuration across buck, boost, and buck-boost topologies. |
| Pass-Thru IQ | 18μA at VINP = 48V; enables ultra-low quiescent operation without switching losses. |
| Output Accuracy | ±1.25% over –40°C to 125°C; ensures stable regulation under extreme environmental conditions. |
| Current Sense Acc. | ±3% monitoring accuracy; enables precise overcurrent protection and load management. |
| Switching Freq. | 80kHz–400kHz, RT-set or synchronized; allows EMI optimization and inductor size reduction. |
| Package | 40-lead (6mm × 6mm) QFN; exposes thermal pad for enhanced power dissipation in high-current designs. |
Pinout & Package
The LT8210IUJ#PBF is housed in a 40-lead (6mm × 6mm) plastic QFN package with exposed thermal pad (Pin 41 = GND). Pin numbering follows top-view layout with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 37) | Enable / Undervoltage Lockout Input | Precision comparator enabling operation above 1.45V; tolerates –40V to 100V; sets startup threshold via resistor divider. |
| MODE1/MODE2 (Pins 40/39) | Operating Mode Selection | Binary-coded inputs selecting CCM, DCM, Burst Mode, or Pass-Thru; define functional behavior without external logic. |
| FB1/FB2 (Pins 31/30) | Feedback Inputs | FB1 regulates boost loop (VOUT ≥ VIN); FB2 regulates buck loop (VOUT ≤ VIN); each has 1.00V nominal reference. |
| SNSP2/SNSN2 (Pins 28/27) | Output/Input Current Sense Inputs | Differential pair for average current monitoring; supports ±3% accuracy and ±5% regulation via IMON output. |
| TG1/TG2, BG1/BG2 (Pins 24/21, 19/16) | N-Channel MOSFET Gate Drivers | 10V drivers with 3Ω pull-up / 1Ω pull-down; support fast switching and low gate charge loss in 4-switch topology. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pass-Thru Window | User-definable VIN range where input passes directly to output-eliminates switching losses and EMI while achieving 99.9% efficiency. |
| Reverse Input Protection | Supports –40V input survival using single external N-MOSFET on DG pin; meets ISO 16750-2 and MIL-STD-1275 requirements. |
| Back-Drive Protected GATEVCC | Maintains 10.6V gate drive during input brownouts by sourcing current from EXTVCC or VINP-ensures reliable MOSFET turn-on during transients. |
| Spread Spectrum Modulation | Reduces peak EMI by ±12.5% frequency dithering when SYNC/SPRD tied to VDD-simplifies compliance with CISPR 25 Class 5. |
| Power Good Monitor | Open-drain PWGD asserts low if VOUT deviates >±10% or IMON exceeds 1.20V-enables system-level fault detection without external comparators. |
Applications
| Automotive Start-Stop Systems | Avionics Power Distribution |
|---|---|
Use Scenario: Maintaining stable 28V supply during engine cranking when battery drops to 4V–6V. IC Role / Device Role / Timing Role: Buck-boost controller regulating output from 4V–100V input range while surviving –40V load dump pulses. Use Value: Eliminates need for separate pre-regulator and post-regulator stages; reduces BOM count and improves cold-crank reliability. | Use Scenario: Converting 270V DC aircraft bus to regulated 28V for flight control subsystems. IC Role / Device Role / Timing Role: High-voltage synchronous buck-boost controller with MIL-STD-704/DO-160 compliance. Use Value: Supports 100V continuous operation and withstands 100V transients-meets avionics surge immunity requirements without derating. |
| Industrial Telecom Power | Emergency Call (eCall) Modules |
Use Scenario: Providing isolated 48V output from PoE++ or 54V telecom rectifier with dynamic line/load regulation. IC Role / Device Role / Timing Role: Wide-input buck-boost controller with programmable pass-thru for zero-loss standby during nominal input. Use Value: Achieves >95% full-load efficiency and <18μA pass-thru IQ-reduces thermal stress and extends uptime in fanless enclosures. | Use Scenario: Powering GSM/LTE module and GPS receiver in vehicle black box during crash event. IC Role / Device Role / Timing Role: Dual-loop controller delivering 5V/3.3V rails from backup supercapacitor or battery with ISO 7637-2 pulse immunity. Use Value: Survives –40V reverse polarity and 100V surges per ISO 7637-2 Pulse 5a-ensures eCall activation even after severe electrical faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3780EUHF#PBF | Fixed 100V max VIN; no pass-thru mode; requires external MOSFET drivers; 55V max VOUT. | Lacks non-switching pass-thru; less suitable for ultra-low-IQ automotive standby. | Select when cost sensitivity outweighs pass-thru efficiency benefit and VOUT ≤ 55V. |
| MAX20096ATPA/VY+ | Integrated 100V MOSFETs; fixed 2.2MHz switching; no EXTVCC option; ±2% current sense accuracy. | Higher integration but lower current sense accuracy and no programmable pass-thru window. | Select for space-constrained designs where integrated FETs reduce layout complexity and 2.2MHz enables smaller magnetics. |
Compared with LTC3780EUHF#PBF and MAX20096ATPA/VY+, the LT8210IUJ#PBF uniquely delivers programmable pass-thru, 100V VOUT capability, and ±1.25% output accuracy-making it optimal for high-reliability automotive and avionics systems requiring zero-loss standby and wide transient tolerance.
Availability
LT8210IUJ#PBF is available at Aetrix Electronics and suitable for automotive start-stop, avionics power distribution, and industrial telecom power systems requiring stable component supply, long-term lifecycle support, and compliance with ISO 7637, MIL-STD-1275, and DO-160 standards.
Supply support for LT8210IUJ#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and aerospace markets.
The LT8210 product line delivers robust 4-switch buck-boost controllers designed for mission-critical power systems operating across extreme input ranges and harsh electromagnetic environments.
FAQ
What is the maximum input voltage rating for the LT8210IUJ#PBF?
The LT8210IUJ#PBF supports an absolute maximum input voltage of 100V on VIN and VINP pins, with operational range from 2.8V to 100V after startup (4.5V minimum for initial start-up). This enables direct interface with 48V, 72V, and 96V industrial and automotive battery systems without external pre-regulation.
How does the pass-thru mode function in the LT8210IUJ#PBF?
The LT8210IUJ#PBF enters pass-thru mode when input voltage falls within a user-programmed window defined by FB1 and FB2 feedback dividers. In this state, internal switches disconnect and input connects directly to output-eliminating switching losses, reducing EMI, and achieving 99.9% efficiency at light loads. The LT8210IUJ#PBF automatically transitions to buck or boost regulation outside the window.
Can the LT8210IUJ#PBF support reverse input protection down to –40V?
Yes, the LT8210IUJ#PBF supports reverse input protection to –40V using a single external N-channel MOSFET controlled by the DG pin. When VIN goes negative, the DG driver turns off the MOSFET to disconnect the input, satisfying ISO 16750-2 and MIL-STD-1275 requirements. The LT8210IUJ#PBF's DG pin tolerates –40V and provides precise undervoltage detection at –1.2V.
What is the purpose of the IMON pin on the LT8210IUJ#PBF?
The IMON pin on the LT8210IUJ#PBF outputs a current proportional to the differential voltage across SNSP2/SNSN2, enabling accurate average current monitoring and regulation. With ±3% measurement accuracy and ±5% regulation tolerance, IMON allows precise setting of input or output current limits using a single resistor to ground-critical for battery charging, overload protection, and power budgeting in the LT8210IUJ#PBF design.
Does the LT8210IUJ#PBF require external bootstrap capacitors?
Yes, the LT8210IUJ#PBF requires external bootstrap capacitors (CBST1, CBST2) connected between BST1/SW1 and BST2/SW2. These capacitors provide gate drive voltage for the high-side N-channel MOSFETs in buck and boost phases. Typical values are 15nF for BST1 and 2.2nF for BST2, selected based on MOSFET gate charge and switching frequency-ensuring reliable high-side drive in the LT8210IUJ#PBF 4-switch architecture.
LT8210IUJ#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Number of Outputs:
- 2
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 100V
- Frequency - Switching:
- 80kHz ~ 400kHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LT8210IUJ#PBF FAQ
1.How can I place an order for LT8210IUJ#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8210IUJ#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 LT8210IUJ#PBF reliable?
The price and inventory of LT8210IUJ#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8210IUJ#PBF is usually 5 days.
3.What payment methods are accepted for LT8210IUJ#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8210IUJ#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8210IUJ#PBF?
LT8210IUJ#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8210IUJ#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 LT8210IUJ#PBF?
For technical support, including LT8210IUJ#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8210IUJ#PBF requirements.
6.How does Aetrix verify that LT8210IUJ#PBF is sourced from the original manufacturer or authorized distributors?
All LT8210IUJ#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 LT8210IUJ#PBF meets industry standards.
7.What is the process for return or replacement of LT8210IUJ#PBF?
All LT8210IUJ#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8210IUJ#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 LT8210IUJ#PBF part is unused and in its original packaging.
Return procedure for LT8210IUJ#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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