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Analog Devices Inc. LT8210EFE#PBF
- Part No.:
- LT8210EFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT8210EFE#PBF.pdf
- Description:
- 100V BUCK/BOOST CTLR WITH PASS-T
- Quantity:
- Payment:
- Shipping:
Inventory:1,484
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Product details
Overview
LT8210EFE#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 integrated 10V quad N-channel gate drivers. It enables high-efficiency power conversion in automotive start-stop and ISO 7637-compliant industrial systems.
For engineers reviewing the LT8210EFE#PBF datasheet, LT8210EFE#PBF pinout, LT8210EFE#PBF application, or LT8210EFE#PBF equivalent, key selection considerations include pass-thru window programming, reverse input protection down to –40V, ±3% current monitoring accuracy, EXTVCC/GATEVCC power architecture, and TSSOP-38 thermal performance under 100V transients.
Technical Context
The LT8210EFE#PBF implements dual-loop control: FB1 regulates boost-mode output (e.g., VOUT(BUCK) = 16V), FB2 regulates buck-mode output (e.g., VOUT(BOOST) = 8V), and pass-thru activates when VINP is within a user-defined window between those setpoints. Its GATEVCC regulator delivers 10.6V at up to 115mA from VINP or EXTVCC, with backdrive protection during brownouts.
It supports four operating modes-CCM, DCM, Burst Mode®, and pass-thru-selected via MODE1/MODE2 logic levels. Cycle-by-cycle inductor current limiting uses ±20% accurate sensing on SNSP1/SNSN1, while IMON provides ±3% average current monitoring referenced to SNSP2/SNSN2 with 50mV sense threshold at RIMON = 33.2kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.8V to 100V (4.5V min for start-up); survives –40V reverse input with optional N-MOSFET. |
| VOUT Range | 1V to 100V; dual FB pins enable independent buck/boost regulation or pass-thru window definition. |
| Output Accuracy | ±1.25% over –40°C to 125°C; ensures stable rail generation in automotive and avionics environments. |
| Pass-Thru IQ | 18µA at VINP = 48V; eliminates switching losses and EMI while maintaining >99.9% efficiency in non-switching region. |
| Switching Frequency | 80kHz–400kHz RT-set or synchronized; spread-spectrum modulation reduces peak EMI by >10dB. |
| Gate Drive | 10V quad N-channel drivers (TG1/BG1/TG2/BG2); 3Ω pull-up / 1Ω pull-down enables fast MOSFET switching with <25ns rise time. |
| Current Sensing | ±3% accurate IMON output; ±5% current regulation; ±20% cycle-by-cycle inductor limit with 45–96mV threshold range. |
Pinout & Package
LT8210EFE#PBF is housed in a 38-lead plastic TSSOP (FE package) with exposed pad (Pin 39) soldered to PCB ground. Thermal resistance θJA = 25°C/W. Pin numbering follows top-view layout with EN/UVLO at Pin 1 and GND (exposed pad) at Pin 39.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable & undervoltage lockout input | Precision comparator with 1.45V enable threshold; tolerates –40V to 100V; sets startup VIN minimum via resistor divider. |
| MODE1/MODE2 (Pins 2–3) | Operating mode selection inputs | Logic-controlled selection of CCM, DCM, Burst Mode®, or pass-thru; no external pull-ups required when tied to VDD. |
| SNSP1/SNSN1 (Pins 24–25) | Inductor current sense inputs | Differential pair for cycle-by-cycle current limiting; supports bidirectional sensing with –55mV to +70mV threshold range. |
| SNSP2/SNSN2 (Pins 33–34) | Average current monitor inputs | High-common-mode (0–100V), high-CMRR (>120dB) inputs for precision output/input current regulation. |
| TG1/BG1/TG2/BG2 (Pins 26/29/36/30) | N-channel MOSFET gate drivers | 10V drivers with 3Ω pull-up / 1Ω pull-down; support external high-side/lower-side FETs in 4-switch topology. |
| GATEVCC (Pin 27) | Gate driver supply regulator output | 10.6V regulated rail; powered from VINP or EXTVCC; backdrive-protected to sustain regulation during input brownout. |
| EXTVCC (Pin 28) | External gate drive supply input | Accepts 7.3–8.8V input; switchover hysteresis prevents oscillation; improves efficiency vs internal GATEVCC sourcing. |
| PWGD (Pin 5) | Open-drain power-good indicator | Asserts low if VOUT deviates >±10% or IMON >1.20V; compatible with 40V pull-up rails including VDD or GATEVCC. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pass-Thru Window | Enables direct VIN-to-VOUT conduction when input falls within user-defined buck/boost setpoint boundaries, eliminating switching loss and EMI. |
| Reverse Input Protection | Supports –40V survival with single external N-MOSFET; DG pin controls disconnect at –1.2V VIN threshold with 80mA pull-down capability. |
| High-Accuracy Current Monitoring | ±3% IMON output accuracy and ±5% regulation enable precise battery charge/discharge or load current limiting without external op-amps. |
| Robust Gate Drive Architecture | 10V quad drivers with <25ns rise/fall times and 200ns minimum on-times ensure reliable FET switching across 100V transients and wide temperature range. |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by spreading fundamental switching frequency ±12.5% around RT-set center, easing CISPR 25 Class 5 compliance. |
Applications
| Automotive Start-Stop Systems | Avionics Power Distribution |
|---|---|
Use Scenario: Maintaining stable 28V bus during engine cranking where battery voltage dips to 4V and surges to 16V. IC Role / Device Role / Timing Role: 4-switch buck-boost controller regulating output while enabling pass-thru above 24V to bypass conversion loss. Use Value: Delivers >99.9% efficiency in pass-thru mode and withstands ISO 16750-2 pulse 4a (–40V reverse) with optional MOSFET. | Use Scenario: Converting 28V aircraft bus to 12V/5V rails for flight-critical avionics with MIL-STD-704F compliance. IC Role / Device Role / Timing Role: Primary DC/DC controller supporting dual-output regulation and dynamic line/load transient response per DO-160 Section 16. Use Value: ±1.25% output accuracy over –40°C to 125°C and 100V absolute max rating meet avionics reliability requirements. |
| Industrial Telecom Power | Railway Signaling Equipment |
Use Scenario: Providing isolated 48V PoE++ auxiliary power from fluctuating 36–75V telecom rectifier outputs. IC Role / Device Role / Timing Role: Buck-boost controller with programmable pass-thru window centered at 48V to minimize heat during nominal operation. Use Value: 18µA pass-thru quiescent current and spread-spectrum EMI reduction simplify thermal and EMC design in dense chassis. | Use Scenario: Powering signaling modules in EN 50155-compliant rolling stock exposed to 110V transients and –40°C cold starts. IC Role / Device Role / Timing Role: High-voltage DC/DC controller surviving ISO 7637-2 pulses (5a/5b) and regulating 24V output from 72–110V input. Use Value: Reverse input protection to –40V and 100V VIN/VOUT rating eliminate need for upstream TVS clamping in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-switch buck-boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7813EUFD#PBF | Requires external bootstrap diodes; no integrated pass-thru mode; lower VIN max (60V); 32-pin QFN only. | Best for cost-sensitive industrial supplies where pass-thru is unnecessary and input stays below 60V. | Select LTC7813 when board space permits discrete bootstrap and system does not require non-switching conduction. |
| MPQ4332GSD-AEC1-P | Automotive-grade 36V max VIN; integrated MOSFETs; fixed 2.1MHz frequency; no pass-thru or reverse protection. | Suitable for 12V/24V ADAS camera modules but cannot replace LT8210EFE#PBF in 100V or reverse-survival applications. | Choose MPQ4332 only for compact, low-input-voltage automotive loads without transient survivability requirements. |
Compared with LTC7813EUFD#PBF and MPQ4332GSD-AEC1-P, the LT8210EFE#PBF uniquely combines 100V operation, programmable pass-thru, –40V reverse input tolerance, and dual-loop buck/boost regulation-enabling single-chip solutions for harsh-environment power where efficiency, survivability, and flexibility are co-required.
Availability
LT8210EFE#PBF is available at Aetrix Electronics and suitable for automotive start-stop, avionics power distribution, and industrial telecom systems requiring stable component supply across extended temperature and high-voltage stress conditions.
Supply support for LT8210EFE#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 LT8210EFE#PBF belongs to Analog Devices' Power by Linear™ controller family, engineered for ultra-wide input voltage regulation in mission-critical systems where reliability under extreme electrical stress is mandatory.
FAQ
What is the maximum input voltage rating for the LT8210EFE#PBF?
The LT8210EFE#PBF has an absolute maximum input voltage rating of 100V on VIN and VINP pins, and it survives –40V reverse input with optional external N-MOSFET. Its guaranteed operating range is 2.8V to 100V after startup (4.5V minimum for initial start-up). This makes the LT8210EFE#PBF suitable for applications exposed to ISO 7637-2 pulse 5a (100V) and MIL-STD-1275E surge events.
How does the pass-thru mode function in the LT8210EFE#PBF?
The LT8210EFE#PBF enters pass-thru mode when VINP falls within a user-programmed window defined by FB1 (boost setpoint) and FB2 (buck setpoint). In this state, the controller disables switching and directly connects input to output via external MOSFETs, achieving 99.9% efficiency and zero switching noise. The LT8210EFE#PBF maintains regulation using its dual error amplifiers to manage transitions seamlessly into buck or boost modes outside the window.
What package type is used for the LT8210EFE#PBF?
The LT8210EFE#PBF uses a 38-lead plastic TSSOP (FE package) with exposed thermal pad (Pin 39) that must be soldered to PCB ground. Its θJA is 25°C/W, supporting high-power operation in constrained spaces. This differs from the QFN variant (LT8210EUJ#PBF), which uses a 40-lead 6mm × 6mm package with different pinout and thermal profile.
Can the LT8210EFE#PBF support reverse input protection?
Yes-the LT8210EFE#PBF supports reverse input protection down to –40V using a single external N-channel MOSFET controlled by the DG pin. When VIN drops below –1.2V, the DG driver pulls down to disconnect the input path. The LT8210EFE#PBF's DG pin provides 80mA pull-down current and tolerates –40V, enabling robust protection compliant with ISO 16750-2 without additional ICs.
What is the accuracy of current monitoring on the LT8210EFE#PBF?
The LT8210EFE#PBF provides ±3% accuracy for IMON output current and ±5% accuracy for average current regulation, referenced to the SNSP2/SNSN2 differential input. At RIMON = 33.2kΩ, the sense threshold is 50.5mV ±2.5mV, enabling precise load current limiting or battery charge control without calibration. This accuracy holds across –40°C to 125°C ambient temperature.
LT8210EFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) 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):
- 2.8V ~ 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:
- 38-TSSOP-EP
LT8210EFE#PBF FAQ
1.How can I place an order for LT8210EFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8210EFE#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 LT8210EFE#PBF reliable?
The price and inventory of LT8210EFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8210EFE#PBF is usually 5 days.
3.What payment methods are accepted for LT8210EFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8210EFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8210EFE#PBF?
LT8210EFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8210EFE#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 LT8210EFE#PBF?
For technical support, including LT8210EFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8210EFE#PBF requirements.
6.How does Aetrix verify that LT8210EFE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8210EFE#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 LT8210EFE#PBF meets industry standards.
7.What is the process for return or replacement of LT8210EFE#PBF?
All LT8210EFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8210EFE#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 LT8210EFE#PBF part is unused and in its original packaging.
Return procedure for LT8210EFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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