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Analog Devices Inc. LTC7810ELXE#PBF
- Part No.:
- LTC7810ELXE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
LTC7810ELXE#PBF.pdf
- Description:
- 150V LOW IQ, DUAL, 2-PHASE SYNCH
- Quantity:
- Payment:
- Shipping:
Inventory:237
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Product details
Overview
LTC7810ELXE#PBF from Analog Devices is a high-performance dual synchronous step-down DC/DC controller driving all-N-channel MOSFET stages, supporting input voltages up to 140V and output voltages from 1V to 60V. It features 16μA no-load quiescent current, phase-lockable switching frequency up to 720kHz, and programmable gate drive (6V/8V/10V) for logic- or standard-threshold FETs - enabling high-efficiency 12V/5V dual-output power supplies in automotive and industrial systems.
For engineers reviewing the LTC7810ELXE#PBF datasheet, LTC7810ELXE#PBF pinout, LTC7810ELXE#PBF application, or LTC7810ELXE#PBF equivalent, key selection criteria include its 140V max input rating, dual-phase interleaved operation reducing input ripple, spread spectrum EMI reduction, low-IQ dropout capability (78μA with one channel active), and AEC-Q100 qualification for automotive use.
Technical Context
The LTC7810ELXE#PBF implements two independent constant-frequency current-mode controllers with out-of-phase operation (180° offset), reducing input capacitor RMS current and conducted noise. Each channel supports RSENSE or DCR current sensing, selectable light-load modes (Burst Mode®, pulse-skipping, or forced continuous), and precision 1V feedback reference with ±15mV tolerance over temperature.
Its bias architecture includes three LDO options for DRVCC: internal VIN-based (6V/8V/10V set by DRVSET), external NMOS-driven NDRV, or EXTVCC-powered switchover LDO - enabling flexible gate driver supply design across wide input ranges. The integrated charge pump supports BOOST-SW voltage up to 11V, ensuring reliable high-side FET drive even near dropout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 140V - supports direct connection to 48V, 72V, and 110V industrial or transportation bus rails without pre-regulation. |
| Output Voltage Range | 1V to 60V - enables single-controller generation of both logic (3.3V/5V) and intermediate (12V/24V) rails via external resistor dividers. |
| No-Load Quiescent Current | 16μA at 48VIN → 12V/3.3V - extends battery runtime in always-on automotive modules and remote sensors. |
| Switching Frequency | 75kHz to 720kHz (phase-lockable) - allows EMI optimization via synchronization to system clock or spread spectrum dithering. |
| Gate Drive Voltage | Programmable 6V/8V/10V - matches threshold requirements of logic-level (2.5V–4.5V VGS(th)) and standard (4.5V–5V) MOSFETs for optimal efficiency. |
| Current Sensing | RSENSE or inductor DCR - eliminates need for dedicated sense resistors in cost-sensitive designs while maintaining accuracy. |
| Thermal Rating | –40°C to +125°C junction - qualified per AEC-Q100 Grade I, suitable for under-hood automotive and harsh industrial environments. |
Pinout & Package
Package: 48-lead (7mm × 7mm) eLQFP with exposed thermal pad (Pin 49 = SGND), θJA = 20°C/W. Requires soldering of exposed pad to PCB ground plane for rated thermal performance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1+, SENSE1– | Differential current sense inputs (Channel 1) | Accepts voltage drop across RSENSE or DCR; supports sleep-mode current sourcing from SENSE1– to reduce input-referred IQ. |
| TG1, BG1, BOOST1, SW1 | High-side gate driver, low-side gate driver, bootstrap supply, and switch node (Channel 1) | Drives external N-channel MOSFETs; BOOST1 charges bootstrap capacitor to enable high-side FET conduction above VIN. |
| VFB1, ITH1, TRACK/SS1 | Feedback input, error amplifier output, soft-start/tracking control (Channel 1) | VFB1 sets output voltage via resistor divider; ITH1 provides compensation node; TRACK/SS1 enables output voltage ramping or multi-rail sequencing. |
| DRVSET | DRVCC regulation programming pin | Selects DRVCC LDO output: GND = 8V, INTVCC = 6V, open = 10V - directly determines gate drive strength and UVLO thresholds. |
| PLLIN/SPREAD | Phase-lock/synchronization and spread spectrum enable | Ground = fixed frequency; INTVCC = spread spectrum mode (±15% dither); external clock = phase-synchronized operation. |
| RUN1, RUN2 | Enable inputs for Channel 1 and Channel 2 | Logic-high >1.22V enables respective controller; hysteresis ensures clean startup/shutdown; supports independent channel sequencing. |
| OVLO | Overvoltage lockout input | Disables switching when >1.22V applied - protects downstream circuitry during input transients without disabling bias supplies. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 180° out-of-phase controllers | Reduces input capacitor RMS current by ~30% and lowers peak input ripple, enabling smaller CIN and lower EMI filter cost. |
| Spread spectrum modulation | ±15% frequency dithering at 4.5kHz center reduces peak conducted/EMI emissions by up to 10dB, easing CISPR 25 Class 5 compliance. |
| Low-IQ dropout operation | 78μA total supply current with one channel active in dropout (VIN ≈ VOUT) - maintains ultra-low standby power without sacrificing regulation. |
| Programmable light-load behavior | MODE pin selects Burst Mode® (high efficiency <10mA), pulse-skipping (low noise), or forced continuous (lowest output ripple) - adaptable to dynamic load profiles. |
| AEC-Q100 Grade I qualification | Validated for automotive applications including ADAS cameras, infotainment, and body control modules operating at –40°C to +125°C. |
Applications
| Automotive ADAS Power Supply | Industrial 48V Telecom Rectifier |
|---|---|
|
Use Scenario: Dual-rail power for radar ECU requiring isolated 12V analog and 5V digital domains with strict EMI limits. IC Role / Device Role / Timing Role: Primary dual-phase buck controller managing 72V battery input to regulated 12V/5V outputs with synchronized switching and spread spectrum. Use Value: Meets CISPR 25 Class 5 radiated emissions without added shielding; 16μA IQ extends parking-mode battery life beyond 30 days. |
Use Scenario: High-voltage DC-DC conversion in 48V distributed power architecture for base station RF amplifiers. IC Role / Device Role / Timing Role: Interleaved step-down controller delivering 12V@6A and 5V@6A from 48–110V input with input ripple cancellation. Use Value: Out-of-phase operation cuts input capacitor size by 40%; 140V abs max rating avoids front-end pre-regulator stage. |
| Military Vehicle Power Management | Transportation Onboard Charger Interface |
|
Use Scenario: Power conversion in armored vehicle subsystems where wide input range (12–140V) and extreme temperature resilience are mandatory. IC Role / Device Role / Timing Role: Dual-buck controller with independent RUN pin control enabling hot-swap capable 24V/12V rail sequencing during engine cranking. Use Value: 100% duty cycle operation sustains output during 6V cold-crank dips; AEC-Q100 qualification covers MIL-STD-810H environmental stress. |
Use Scenario: Auxiliary power supply in EV onboard chargers converting high-voltage battery pack voltage (200–450V) to 12V/5V for MCU and CAN interface. IC Role / Device Role / Timing Role: Pre-regulator controller stepping down intermediate bus (e.g., 48V or 60V) to stable 12V/5V with programmable OVLO for battery fault isolation. Use Value: Programmable OVLO (1.22V threshold) enables fast shutdown during HV bus faults; EXTVCC switchover ensures robust gate drive during transient load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7803IUFD#PBF | Single-channel, 150V controller with integrated gate drivers; no dual-phase or spread spectrum; 28μA IQ. | Suitable for single-output designs only; lacks interleaving benefit and EMI reduction features. | Choose when only one regulated rail is needed and board space is constrained - uses 40-pin QFN vs. 48-pin eLQFP. |
| MPQ8645PGU-AEC1-Z | Automotive-grade dual buck controller (4.5–60V IN); 25μA IQ; fixed 500kHz fSW; no spread spectrum or programmable gate drive. | Limited to ≤60V input - requires pre-regulator for 72V+ systems; no phase-lock or frequency tuning. | Select for cost-sensitive 12V/48V automotive systems where input range stays below 60V and EMI filtering is handled externally. |
Compared with LTC7810ELXE#PBF, LTC7803IUFD#PBF saves board area but sacrifices dual-rail flexibility and EMI control, while MPQ8645PGU-AEC1-Z offers lower BOM cost in ≤60V applications but cannot replace LTC7810ELXE#PBF in 140V industrial or transportation systems.
Availability
LTC7810ELXE#PBF is available at Aetrix Electronics and suitable for automotive ADAS modules, industrial 48V telecom rectifiers, and military vehicle power management systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LTC7810ELXE#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The LTC7810ELXE#PBF belongs to Analog Devices' Power by Linear™ high-voltage controller family, designed specifically for rugged, high-efficiency DC/DC conversion in automotive, transportation, and industrial applications demanding wide input range and low quiescent power.
FAQ
What is the absolute maximum input voltage rating for the LTC7810ELXE#PBF?
The LTC7810ELXE#PBF has an absolute maximum input voltage rating of 150V on the VIN pin, with recommended continuous operation up to 140V. This rating enables direct connection to 72V and 110V industrial bus systems and withstands automotive load-dump transients without external clamping. Exceeding 150V risks permanent damage per Absolute Maximum Ratings table.
How does the LTC7810ELXE#PBF achieve ultra-low quiescent current in battery-powered systems?
The LTC7810ELXE#PBF achieves 16μA no-load IQ through a multi-stage bias architecture: SENSE1– supplies sleep-mode current instead of VIN when >3.2V, DRVCC LDOs are optimized for low leakage, and internal regulators shut down unused blocks. In dropout with one channel active, total IQ drops to 78μA - verified in Figure 14 test circuit at 48VIN → 12V/3.3V.
Can the LTC7810ELXE#PBF be used in single-output, two-phase configurations?
Yes, the LTC7810ELXE#PBF supports single-output two-phase operation by tying VFB2 to INTVCC and connecting ITH1 and TRACK/SS1 to both channels. This configures Channel 2 as a slave, synchronizing its switching to Channel 1 with 180° phase offset - reducing output ripple and improving transient response while sharing one feedback loop.
What is the purpose of the REGSD pin on the LTC7810ELXE#PBF?
The REGSD pin on the LTC7810ELXE#PBF implements a regulator shutdown timer that limits linear regulator (VIN/NDRV) on-time when EXTVCC is below its switchover threshold. A capacitor from REGSD to GND sets timeout duration (tREGSD = 1.2·CREGSD/10μA); exceeding 1.2V triggers 29×tREGSD shutdown, enforcing a 3.3% "regulator-on" duty cycle to prevent thermal overstress.
Does the LTC7810ELXE#PBF support external synchronization of switching frequency?
Yes, the LTC7810ELXE#PBF supports external synchronization via the PLLIN/SPREAD pin. Applying a clean clock signal (75–720kHz) to this pin locks the rising edge of TG1 to the external clock's rising edge. The internal phase-locked loop maintains synchronization across temperature and line variations, enabling deterministic EMI reduction in multi-converter systems.
LTC7810ELXE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 140V
- Frequency - Switching:
- 105kHz ~ 780kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Frequency Control, Soft Start
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-eLQFP (7x7)
LTC7810ELXE#PBF FAQ
1.How can I place an order for LTC7810ELXE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7810ELXE#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 LTC7810ELXE#PBF reliable?
The price and inventory of LTC7810ELXE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7810ELXE#PBF is usually 5 days.
3.What payment methods are accepted for LTC7810ELXE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7810ELXE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7810ELXE#PBF?
LTC7810ELXE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7810ELXE#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 LTC7810ELXE#PBF?
For technical support, including LTC7810ELXE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7810ELXE#PBF requirements.
6.How does Aetrix verify that LTC7810ELXE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC7810ELXE#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 LTC7810ELXE#PBF meets industry standards.
7.What is the process for return or replacement of LTC7810ELXE#PBF?
All LTC7810ELXE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7810ELXE#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 LTC7810ELXE#PBF part is unused and in its original packaging.
Return procedure for LTC7810ELXE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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