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Analog Devices Inc. LT8210EFE#TRPBF
- Part No.:
- LT8210EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT8210EFE#TRPBF.pdf
- Description:
- 100V BUCK/BOOST CTLR WITH PASS-T
- Quantity:
- Payment:
- Shipping:
Inventory:3,863
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Product details
Overview
LT8210EFE#TRPBF 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 LT8210EFE#TRPBF datasheet, LT8210EFE#TRPBF pinout, LT8210EFE#TRPBF application, or LT8210EFE#TRPBF equivalent, key selection criteria include pass-thru window programming, ±3% current monitoring accuracy, GATEVCC regulation at 10.6V for standard-level MOSFETs, EXTVCC switchover at 8V, and 38-lead TSSOP package thermal performance.
Technical Context
The LT8210EFE#TRPBF implements dual-loop control: FB1 regulates boost-mode output (e.g., VOUT(BOOST) = 8V), FB2 regulates buck-mode output (e.g., VOUT(BUCK) = 16V), and pass-thru activates when VINP falls within a user-defined window between those setpoints. Its cycle-by-cycle inductor current limit operates at ±20% tolerance with thresholds from 45mV to 96mV depending on operating region.
Pass-thru mode disables switching entirely-eliminating gate drive losses and EMI-while maintaining regulation via direct conduction path. The GATEVCC regulator is back-drive-protected and can be powered from either VINP or EXTVCC (switchover at 8V), enabling robust operation during input brownouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.8V to 100V (4.5V min for startup); supports wide-input automotive and industrial rails. |
| VOUT Range | 1V to 100V; configurable via FB1/FB2 resistive dividers for buck, boost, or pass-thru regulation. |
| Pass-Thru IQ | 18µA at VINP = 48V; enables ultra-low quiescent power in non-switching mode. |
| Output Accuracy | ±1.25% over –40°C to 125°C; ensures stable regulation across automotive temperature extremes. |
| Current Monitoring | ±3% accuracy; IMON output scales linearly with (SNSP2 – SNSN2) for precise average current limiting. |
| Switching Frequency | 80kHz–400kHz RT-set or synchronized; spread-spectrum option reduces EMI peak emissions. |
| Gate Drive | 10V quad N-channel drivers with 3Ω TG pull-up, 1Ω TG pull-down; supports fast, low-loss MOSFET switching. |
Pinout & Package
LT8210EFE#TRPBF is housed in a 38-lead plastic TSSOP (FE package) with exposed pad (Pin 39) soldered to PCB ground for thermal management. Absolute max ratings include –40V to 100V on VIN/EN/UVLO and –0.3V to 115V on BST1/BST2 pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/UVLO (Pin 1) | Enable & UVLO input | Precision comparator with 1.45V enable threshold; tolerates –40V; sets startup voltage via resistor divider. |
| MODE1/MODE2 (Pins 2–3) | Operating mode select | Binary-coded inputs selecting CCM, DCM, Burst Mode, or Pass-Thru; no external logic required. |
| PWGD (Pin 5) | Open-drain power-good flag | Asserts low if VOUT deviates >±10% or IMON >1.20V; compatible with up to 40V pull-up rails. |
| SNSP1/SNSN1 (Pins 22–23) | Inductor current sense inputs | Differential pair measuring (VSNSP1 – VSNSN1); used for cycle-by-cycle current limiting in buck/boost regions. |
| SNSP2/SNSN2 (Pins 34–35) | Input/output current monitor inputs | Differential pair feeding IMON output; enables accurate average current regulation with ±3% error. |
| TG1/TG2, BG1/BG2 (Pins 25,28,31,38) | N-channel MOSFET gate drivers | 10V logic-level drivers with matched rise/fall times (<30ns); support independent top/bottom switch control. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Pass-Thru Window | Enables zero-switching-loss conduction when VINP lies between FB1- and FB2-set output voltages-critical for efficiency in automotive battery backup paths. |
| GATEVCC Back-Drive Protection | Maintains 10.6V gate drive during VINP brownout by sourcing current from EXTVCC or internal charge pump-ensures MOSFET turn-on integrity under transient faults. |
| Reverse Input Protection to –40V | Implemented via DG pin control of external N-MOSFET; prevents damage during load dump or polarity reversal without added diodes. |
| ±20% Cycle-by-Cycle Current Limit | Hardware-based overcurrent protection with <200ns response; thresholds scale with VINP/VOUT to maintain consistent current limit across buck/boost/BB regions. |
| Spread-Spectrum Modulation | Reduces EMI peak amplitude by dithering switching frequency ±12.5% around RT-set center-simplifies compliance with CISPR 25 Class 5. |
Applications
| Automotive Start-Stop Systems | ISO 7637-2 Transient Protection |
|---|---|
Use Scenario: Maintaining stable 12V/48V rail during engine cranking where battery voltage dips to 3.5V. IC Role / Device Role / Timing Role: Buck-boost controller regulating output while seamlessly transitioning between buck, boost, and pass-thru modes as input varies. Use Value: 99.9% pass-thru efficiency eliminates heat buildup during sustained 12V operation; ±1.25% accuracy ensures infotainment MCU supply stability. | Use Scenario: Surviving 100V/100ms load dump pulses per ISO 7637-2 Pulse 5a without latch-off or damage. IC Role / Device Role / Timing Role: High-voltage controller with –40V to 100V absolute max ratings on VIN/EN/UVLO pins and integrated reverse protection. Use Value: Eliminates need for external TVS or series MOSFETs; DG pin drives external N-FET to disconnect input during negative transients. |
| Avionics Power Distribution | Industrial Telecom Rectification |
Use Scenario: Converting 28V aircraft bus to regulated 5V/3.3V supplies for flight control sensors. IC Role / Device Role / Timing Role: Synchronous buck-boost controller supporting DO-160 Section 16 surge immunity with 100V input rating. Use Value: Pass-thru mode engages when bus voltage matches output setpoint-reducing thermal stress and EMI during nominal operation. | Use Scenario: Replacing legacy linear regulators in 48V telecom rectifiers requiring 3.3V/5V/12V outputs. IC Role / Device Role / Timing Role: High-efficiency DC/DC controller supporting wide output range (1V–100V) and programmable current limits. Use Value: ±3% current monitoring enables precise load sharing across parallel modules; EXTVCC switchover improves light-load efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3780EFE#PBF | Fixed 100kHz–600kHz frequency; no pass-thru mode; requires external MOSFET drivers; 40-pin QFN only. | Lacks non-switching conduction path-unsuitable for ultra-low-IQ battery backup or EMI-sensitive pass-thru use cases. | Select LTC3780EFE#PBF only when higher switching frequency and external driver flexibility outweigh pass-thru efficiency needs. |
| LT8705EFE#PBF | Supports wider VIN (2.8V–80V) but lower VOUT max (60V); includes I2C interface; no pass-thru; 38-pin TSSOP package. | No pass-thru capability; lacks reverse input protection; requires digital configuration for current limits. | Choose LT8705EFE#PBF for digitally managed multi-rail systems where I2C telemetry justifies loss of analog pass-thru simplicity. |
Compared with LTC3780EFE#PBF and LT8705EFE#PBF, LT8210EFE#TRPBF uniquely delivers programmable pass-thru conduction, –40V reverse input tolerance, and 100V output capability in the same 38-pin TSSOP footprint-enabling single-chip solutions for ISO 7637/DO-160-compliant designs without external protection circuitry.
Availability
LT8210EFE#TRPBF is available at Aetrix Electronics and suitable for automotive start-stop systems, ISO 7637-compliant industrial power supplies, avionics distribution units, and telecom rectifier modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT8210EFE#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LT8210 product line was designed specifically for high-reliability DC/DC conversion in harsh environments-emphasizing wide input/output voltage range, pass-thru efficiency, reverse polarity resilience, and automotive-grade thermal performance.
FAQ
What is the maximum input voltage rating for the LT8210EFE#TRPBF?
The LT8210EFE#TRPBF has an absolute maximum input voltage rating of 100V on VIN and VINP pins, with survival capability from –40V to 100V. This allows direct connection to 48V and 60V industrial buses and compatibility with ISO 7637-2 load dump testing without external clamping components.
How does the LT8210EFE#TRPBF implement pass-thru mode?
The LT8210EFE#TRPBF enters pass-thru mode when the input voltage (VINP) falls within a user-programmed window defined by FB1 (boost setpoint) and FB2 (buck setpoint). In this state, all four power switches are disabled, enabling direct conduction with 99.9% efficiency and zero switching noise-verified in Figure 37 of the LT8210 datasheet.
What is the purpose of the DG pin on the LT8210EFE#TRPBF?
The DG pin on the LT8210EFE#TRPBF controls an external N-channel MOSFET to provide reverse input protection down to –40V. When VIN drops below –1.2V, the DG driver pulls the gate low to disconnect the input, preventing damage during polarity reversal-without requiring additional Schottky diodes or complex gate drive circuitry.
Can the LT8210EFE#TRPBF regulate both input and output current?
Yes, the LT8210EFE#TRPBF supports precise average current regulation on both input and output sides. SNSP2/SNSN2 inputs feed the IMON pin for ±3% accurate output or input current monitoring, while SNSP1/SNSN1 provides cycle-by-cycle inductor current limiting with ±20% tolerance across buck, boost, and buck-boost regions.
What package type is used for the LT8210EFE#TRPBF?
The LT8210EFE#TRPBF uses a 38-lead plastic TSSOP (FE package) with exposed thermal pad (Pin 39) that must be soldered to PCB ground. This package delivers θJA = 25°C/W and supports reflow-compatible assembly for automotive and industrial applications requiring high reliability.
LT8210EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT8210EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8210EFE#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 LT8210EFE#TRPBF reliable?
The price and inventory of LT8210EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8210EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8210EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8210EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8210EFE#TRPBF?
LT8210EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8210EFE#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 LT8210EFE#TRPBF?
For technical support, including LT8210EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8210EFE#TRPBF requirements.
6.How does Aetrix verify that LT8210EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8210EFE#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 LT8210EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8210EFE#TRPBF?
All LT8210EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8210EFE#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 LT8210EFE#TRPBF part is unused and in its original packaging.
Return procedure for LT8210EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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