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Analog Devices Inc. LT8630EFE#PBF
- Part No.:
- LT8630EFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
- Datasheet:
-
LT8630EFE#PBF.pdf
- Description:
- IC REG BUCK ADJ 600MA 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:164
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Product details
Overview
LT8630EFE#PBF from Analog Devices is a monolithic, current-mode synchronous step-down DC/DC regulator delivering up to 0.6A output current with input voltage range 3V to 100V, internal top/bottom MOSFETs (775mΩ/550mΩ), and boundary mode switching for high efficiency across wide load and input conditions - used in telecom power supplies, industrial distributed regulation, and automotive front-end converters.
For engineers reviewing the LT8630EFE#PBF datasheet, LT8630EFE#PBF pinout, LT8630EFE#PBF application, or LT8630EFE#PBF equivalent, key selection considerations include its 100V absolute max VIN rating, ±7.5% power-good threshold, 16µA no-load quiescent current at 12VIN→5VOUT, and thermally enhanced 20-lead TSSOP package with exposed GND pad.
Technical Context
The LT8630EFE#PBF employs variable-frequency boundary mode control to minimize switching losses across 3V–100V input and 0.8V–60V output ranges, using peak current mode architecture with internal VC node clamping to regulate maximum switch current (1.8A typ). Its Burst Mode® operation enables 16µA IQ at light loads while maintaining <5mV output ripple.
It integrates programmable undervoltage lockout via EN/UV pin (1.19V threshold, 17mV hysteresis), soft-start/tracking via TR/SS pin (4.5µA sink current), and open-drain PG flag signaling ±7.5% VFBREF deviation with 1.9% hysteresis - all implemented within a single monolithic die with internal synchronous switches and thermal shutdown protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 100V - supports direct connection to 48V/72V/100V telecom rails and automotive battery transients without external pre-regulation. |
| Output Current | 0.6A guaranteed at VIN ≥ 10V, VOUT = 5V, L = 15µH - sufficient for powering FPGA I/O banks, microcontroller cores, or isolated gate drivers. |
| Feedback Reference | 0.808V ±12mV - sets precise output voltage via resistor divider; enables stable 3.3V, 5V, or 12V outputs with <±1% regulation error over line/load/temperature. |
| Quiescent Current | 16µA at 12VIN→5VOUT no load - enables >10-year battery life in always-on industrial sensors or remote telemetry nodes. |
| Switching Architecture | Boundary mode PWM - eliminates fixed-frequency switching losses, enabling >90% efficiency at 100mA–600mA loads across 12V–100V inputs. |
| Power Good Flag | Open-drain PG with ±7.5% VFBREF window and 1.9% hysteresis - provides reliable system reset sequencing and fault detection without external comparators. |
| Shutdown Current | <5µA - ensures minimal standby drain during system sleep modes or emergency cutoff. |
Pinout & Package
LT8630EFE#PBF is housed in a thermally enhanced 20-lead plastic TSSOP package (FE20 variant) with exposed GND pad (Pin 21) requiring PCB soldering for low θJC(PAD) = 10°C/W. High-voltage lead spacing meets reinforced insulation requirements for 100V systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Main power input and switch drain node | Accepts 3V–100V; connects directly to high-dI/dt switch node - requires local 2.2µF ceramic decoupling to GND. |
| EN/UV (3) | Enable and undervoltage lockout control | 1.19V threshold with 17mV hysteresis; sinking <100nA - enables programmable startup and brownout protection via resistor divider. |
| PG (5) | Power good status output | Open-drain flag pulled low when FB deviates >±7.5% from 0.808V - drives MCU reset or system supervisor ICs directly. |
| RT (8) | Frequency setting reference | Requires 8.66kΩ to GND - sets internal oscillator reference; determines boundary mode frequency under varying load/VIN. |
| TR/SS (10) | Soft-start and output tracking control | Sinks 4.5µA typical - controls VOUT ramp rate via external capacitor; supports voltage sequencing with other regulators. |
| FB (11) | Feedback input | Compares against 0.808V reference - sets output voltage via R1/R2 divider; bias current <25nA minimizes divider loading error. |
| VOUT (12) | Output sense and current measurement node | Connects to output capacitor positive terminal - senses inductor current via internal RSENSE for cycle-by-cycle current limiting. |
| IND (14) | Inductor connection | High-current path to external inductor - must be routed with low-inductance, wide copper trace to minimize EMI and switching loss. |
| INTVCC (16) | Internal 3V regulator bypass | Requires 2.2µF X7R ceramic to GND - powers internal logic; not for external loading. |
| BST (18) | Bootstrap supply for top switch gate drive | Requires 0.1µF ceramic between BST and SW - generates >VIN gate voltage for efficient high-side MOSFET conduction. |
| SW (20) | Switch node | Drives external inductor - high dV/dt node; must be kept short and adjacent to BST capacitor to minimize ringing. |
| GND (21) | Primary ground reference | Exposed pad - sole GND connection; must be soldered to large thermal pad for heat dissipation and low-noise small-signal grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-wide 3V–100V input range | Eliminates need for external pre-regulators in 24V/48V/72V industrial and telecom systems - withstands load dump transients up to 100V. |
| Boundary mode switching | Enables >92% efficiency at 100mA–600mA loads across full input range - reduces switching losses vs fixed-frequency PWM at light loads. |
| Burst Mode® operation | Maintains <5mV output ripple while achieving 16µA IQ at no load - extends battery runtime in always-on IoT edge nodes. |
| Integrated synchronous power switches | 775mΩ top / 550mΩ bottom MOSFETs - reduce conduction losses and eliminate external diode, saving board space and BOM cost. |
| Programmable UVLO and soft-start | EN/UV pin sets startup threshold; TR/SS pin enables controlled VOUT ramp and multi-rail tracking - prevents inrush current and enables safe power sequencing. |
| Robust fault protection | Includes short-circuit protection, thermal shutdown, and tolerance to pin open/short faults - ensures reliable operation in harsh environments. |
Applications
| Telecom Power Distribution | Automotive Front-End Regulation |
|---|---|
|
Use Scenario: Regulating 48V or 72V telecom rack supply down to 12V for line card subsystems with strict efficiency and transient response requirements. IC Role / Device Role / Timing Role: Primary step-down converter providing isolated 12V rail with fast load transient recovery and low standby power. Use Value: Delivers >93% efficiency at 400mA load from 48VIN, reducing thermal load on densely packed line cards and extending system uptime. |
Use Scenario: Converting vehicle battery voltage (9V–16V nominal, up to 100V during load dump) to stable 5V for ADAS camera modules and radar processors. IC Role / Device Role / Timing Role: Input-hardened buck regulator with integrated UVLO and PG flag for functional safety-critical power domains. Use Value: Withstands 100V transients without external TVS, maintains 5V output during cold-crank (6.5V min), and signals fault via PG pin to host controller. |
| Industrial Sensor Node Power | Distributed Supply Regulation |
|
Use Scenario: Powering ultra-low-power wireless sensor nodes (e.g., LoRaWAN, NB-IoT) from long-life lithium thionyl chloride batteries (3.6V) or energy harvesters. IC Role / Device Role / Timing Role: Micropower buck converter enabling multi-year battery life via 16µA no-load IQ and Burst Mode® operation. Use Value: Achieves 10+ year battery life at 10µA average load; soft-start prevents inrush that could destabilize weak energy sources. |
Use Scenario: Local point-of-load regulation in programmable logic controllers (PLCs), where 24V backplane is converted to 3.3V for FPGA I/O banks and communication interfaces. IC Role / Device Role / Timing Role: Compact, high-efficiency secondary regulator placed near load to minimize IR drop and noise coupling. Use Value: 20-lead TSSOP with exposed pad delivers 0.6A at <15°C/W junction-to-board thermal resistance - avoids need for heatsinks in confined enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8640S-1 | Higher 8A output, 3.4V–65V input, integrated compensation, lower 2.5µA IQ in Silent Switcher mode | Targets higher-power applications (e.g., servo drives); lacks 100V rating and PG flag | Select LT8640S-1 only if >1A output and EMI-sensitive layout are priorities - not suitable for 72V+ telecom or PG-required systems. |
| LM5164QPWPRQ1 | 4.5V–65V input, 0.6A, 1.5µA shutdown IQ, no PG flag, different pinout and compensation scheme | Automotive AEC-Q100 qualified; optimized for cost-sensitive 12V/24V systems, not 100V-rated | Choose LM5164QPWPRQ1 for automotive production where AEC-Q100 compliance is mandatory - but verify absence of PG and lower VIN limit. |
Compared with LT8630EFE#PBF, LT8640S-1 offers higher current and lower EMI but sacrifices 100V capability and power-good signaling; LM5164QPWPRQ1 provides automotive qualification and lower shutdown IQ but lacks both the 100V rating and integrated PG function required for telecom and industrial monitoring systems.
Availability
LT8630EFE#PBF is available at Aetrix Electronics and suitable for telecom power distribution, automotive front-end regulation, and industrial sensor node power requiring stable component supply, long-lifecycle support, and guaranteed 100V transient tolerance.
Supply support for LT8630EFE#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 power management semiconductors, serving industrial, automotive, communications, and healthcare markets with precision signal chain and power solutions.
The LT8630EFE#PBF belongs to Analog Devices' µModule®-adjacent monolithic DC/DC regulator family, designed specifically for ultra-wide-input industrial and telecom power conversion where reliability, efficiency, and transient robustness are critical.
FAQ
What is the maximum input voltage rating for the LT8630EFE#PBF?
The LT8630EFE#PBF has an absolute maximum input voltage rating of 100V on the VIN pin, with guaranteed operation from 3V to 100V. This allows direct interface with 48V, 72V, and 100V telecom supplies and automotive load-dump transients without external clamping components. The device's internal structure and high-voltage lead spacing in the TSSOP package ensure safe operation at this rating.
Does the LT8630EFE#PBF support output voltage tracking during power-up?
Yes, the LT8630EFE#PBF supports flexible output voltage tracking via the TR/SS pin, which sinks a precise 4.5µA current. By connecting a shared capacitor between TR/SS pins of multiple regulators, the LT8630EFE#PBF can track another supply's ramp rate. It also enables independent soft-start by connecting a capacitor from TR/SS to GND - ensuring controlled VOUT rise and eliminating input surge current.
What is the feedback reference voltage of the LT8630EFE#PBF and how precise is it?
The LT8630EFE#PBF uses a precision 0.808V feedback reference voltage (VFBREF) with ±12mV initial accuracy (±1.5%) over temperature. This value is specified across the full –40°C to 125°C operating junction range and enables accurate output programming (e.g., 5V via 1MΩ/191kΩ divider) with minimal drift. The low 25nA FB bias current further preserves divider accuracy.
How does the LT8630EFE#PBF achieve low quiescent current in light-load conditions?
The LT8630EFE#PBF achieves 16µA quiescent current at no load through Burst Mode® operation: it delivers discrete current pulses to the output capacitor, then enters deep sleep where most internal circuitry is disabled. During sleep, only essential bias circuits remain active - minimizing VIN current draw while maintaining <5mV output ripple. Efficiency remains >80% even at 100µA load.
Is the LT8630EFE#PBF pin-compatible with other members of the LT86xx family?
No, the LT8630EFE#PBF is not pin-compatible with other LT86xx devices such as LT8610 or LT8640. Its 20-pin TSSOP layout, pin functions (e.g., dedicated IND pin, NC/DNC placements), and internal architecture differ significantly. Substitution requires PCB redesign. Always verify pin mapping and thermal pad connection requirements before replacement.
LT8630EFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 100V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 60V
- Current - Output:
- 600mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LT8630EFE#PBF FAQ
1.How can I place an order for LT8630EFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8630EFE#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 LT8630EFE#PBF reliable?
The price and inventory of LT8630EFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8630EFE#PBF is usually 5 days.
3.What payment methods are accepted for LT8630EFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8630EFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8630EFE#PBF?
LT8630EFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8630EFE#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 LT8630EFE#PBF?
For technical support, including LT8630EFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8630EFE#PBF requirements.
6.How does Aetrix verify that LT8630EFE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8630EFE#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 LT8630EFE#PBF meets industry standards.
7.What is the process for return or replacement of LT8630EFE#PBF?
All LT8630EFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8630EFE#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 LT8630EFE#PBF part is unused and in its original packaging.
Return procedure for LT8630EFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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