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Analog Devices Inc. LT8630IFE#TRPBF
- Part No.:
- LT8630IFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
- Datasheet:
-
LT8630IFE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,367
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Product details
Overview
LT8630IFE#TRPBF from Analog Devices is a monolithic, current-mode synchronous step-down DC/DC regulator delivering up to 0.6A output current with 3V–100V input range, 0.8V–60V programmable output, and boundary mode switching for high efficiency across wide load and input conditions. It integrates top/bottom MOSFETs, supports Burst Mode® operation (16µA IQ at 12VIN→5VOUT), and features power good flag, soft-start/tracking, and programmable UVLO - used in telecom power supplies and industrial distributed regulation.
For engineers reviewing the LT8630IFE#TRPBF datasheet, LT8630IFE#TRPBF pinout, LT8630IFE#TRPBF application, or LT8630IFE#TRPBF equivalent, key selection criteria include ultra-wide VIN tolerance (100V max), internal synchronous switches, 7.5% PG threshold accuracy, 150ns minimum on-time, and thermal performance in the 20-lead TSSOP with exposed pad.
Technical Context
The LT8630IFE#TRPBF employs variable-frequency boundary mode control to minimize switching losses across input voltages from 3V to 100V and loads from microamps to 0.6A. Its peak-current-mode architecture uses an internal VC node to set per-cycle peak inductor current and trigger Burst Mode when VC falls below threshold.
Operation includes three-phase boundary cycling (top-switch ON, bottom-switch ON, discontinuous ring), with BST-driven high-side gate and integrated 775mΩ/550mΩ MOSFETs. The EN/UV pin programs UVLO via resistor divider, while TR/SS enables linear soft-start and output voltage tracking with ±30mV offset tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 100V - supports automotive cold-crank, 48V/72V telecom, and industrial unregulated rails without pre-regulation. |
| Output Current | 0.6A guaranteed at VIN ≥ 50V, VOUT = 5V, L = 15µH - defines maximum continuous load under worst-case high-input conditions. |
| Quiescent Current | 16µA at 12VIN→5VOUT in Burst Mode - enables >90% efficiency at 100µA load, critical for always-on systems. |
| Feedback Reference | 0.808V ±12mV over –40°C to 125°C - sets output accuracy; output voltage programmed via resistor divider with <±1% error contribution. |
| Power Good Threshold | ±7.5% of VFBREF - signals regulation status with 1.9% hysteresis, enabling safe system sequencing and fault detection. |
| Minimum On-Time | 150ns at VIN = 95V, VOUT = 5V - enables high step-down ratios (e.g., 100V→5V) without pulse-skipping instability. |
| Switch RDS(ON) | Top: 775mΩ, Bottom: 550mΩ - determines conduction loss and thermal rise at full load; exposed-pad TSSOP reduces θJC to 10°C/W. |
Pinout & Package
The LT8630IFE#TRPBF is housed in a thermally enhanced 20-lead plastic TSSOP package (FE20 variation) with exposed GND pad (Pin 21) requiring PCB soldering for optimal thermal resistance (θJC = 10°C/W) and high-voltage lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Main power input & switch drain | Accepts 3V–100V; connects to internal high-side MOSFET drain and UVLO comparator; requires local 2.2µF ceramic decoupling. |
| EN/UV (3) | Enable & undervoltage lockout input | Active-high enable; threshold 1.19V ±26mV; resistor divider sets custom UVLO point; <5µA shutdown current when low. |
| PG (5) | Open-drain power good flag | Sinks current when FB deviates >±7.5% from 0.808V; 1.6% hysteresis ensures clean sequencing signal. |
| RT (8) | Frequency setting reference | Connect 8.66kΩ to GND to set internal oscillator; fixes boundary mode timing baseline. |
| TR/SS (10) | Soft-start & tracking control | Capacitor-based ramp generator; 4.5µA typical charge current; supports output voltage tracking with ±30mV offset. |
| FB (11) | Error amplifier inverting input | Regulated to 0.808V; feedback divider sets VOUT; bias current ±25nA minimizes divider loading error. |
| VOUT (12) | Output sense & current measurement | Connects to output capacitor; internal sense resistor measures inductor current for cycle-by-cycle control. |
| IND (14) | Inductor connection | High dI/dt node; connects directly to inductor; must be routed short and wide to minimize EMI and voltage spikes. |
| BST (18) | Bootstrap supply for high-side gate | Requires 0.1µF capacitor to SW; maintains gate drive above VIN during top-switch conduction. |
| SW (20) | Switch node | Drives external inductor; high dv/dt node; requires minimal trace length and tight coupling to BST capacitor. |
| GND (21) | Primary ground reference | Exposed pad - sole ground connection; must be soldered to large copper pour for thermal and noise integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Boundary Mode Switching | Eliminates fixed-frequency switching losses; adapts frequency to VIN, VOUT, and load - achieves >94% efficiency at 500mA across 12V–100V inputs. |
| Burst Mode® Operation | Reduces IQ to 16µA at no load while limiting VOUT ripple to <5mV - enables battery-backed or energy-harvesting applications. |
| Integrated Synchronous Power Switches | 775mΩ high-side + 550mΩ low-side MOSFETs eliminate external diode losses and simplify layout - no external catch diode required. |
| Programmable Undervoltage Lockout | EN/UV pin accepts resistor divider to set custom startup threshold - supports system-level brown-out protection without external comparators. |
| Flexible Soft-Start & Tracking | TR/SS pin provides linear voltage ramp and master-slave tracking capability - prevents inrush current and enables coordinated multi-rail power-up. |
Applications
| Telecom Power Supply | Distributed Industrial Regulation |
|---|---|
Use Scenario: Regulating 48V or 72V telecom backplane to 12V/5V for line cards and interface modules. IC Role / Device Role / Timing Role: Primary non-isolated buck converter providing stable, efficient, and fault-monitored intermediate rail. Use Value: 100V absolute max rating tolerates transients; PG flag enables hot-swap controller coordination; 0.6A output supports dual Ethernet PHYs or FPGA I/O banks. | Use Scenario: Local point-of-load conversion in PLC I/O modules powered from 24V or 36V field buses. IC Role / Device Role / Timing Role: Compact, high-reliability DC/DC regulator replacing discrete buck controllers and external MOSFETs. Use Value: Wide VIN accommodates bus voltage sag; -40°C to 125°C rating ensures operation in enclosures; exposed pad aids convection cooling in sealed housings. |
| Automotive Body Control | Industrial Sensor Node Power |
Use Scenario: Powering infotainment peripherals or lighting drivers from 12V battery with cold-crank (up to 40V) and load-dump (up to 100V) resilience. IC Role / Device Role / Timing Role: Input-tolerant step-down regulator with built-in UVLO hysteresis and soft-start for controlled module wake-up. Use Value: No external TVS needed for load-dump immunity; 16µA IQ extends battery life in sleep mode; PG flag validates rail before MCU boot. | Use Scenario: Ultra-low-power remote sensor nodes powered by energy harvesters or coin cells requiring long-term stability. IC Role / Device Role / Timing Role: Efficient micropower regulator maintaining regulated output during intermittent energy availability. Use Value: Burst Mode delivers 16µA IQ and <5mV ripple - preserves harvested energy; TR/SS enables wake-up synchronization with sensor sampling clock. |
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 |
|---|---|---|---|
| LT8640SIFE#TRPBF | Higher 4A output, 42V max VIN, lower 2.5µA IQ, same 20-lead TSSOP package but different pinout (no RT pin, integrated compensation). | Targeted at higher-current, lower-input-voltage applications where 100V tolerance is unnecessary. | Select when >0.6A output or sub-5µA quiescent current is required; not pin-compatible - redesign required. |
| LM5164QPWPRQ1 | 40V max VIN, 1A output, 14µA IQ, integrated bootstrap diode, different control architecture (constant-on-time vs boundary mode). | Designed for automotive AEC-Q100 Grade 1; lacks 100V rating and PG flag but offers wider temp range certification. | Choose for automotive-qualified designs below 40V; verify PG functionality replacement if system sequencing depends on it. |
Compared with LT8640SIFE#TRPBF and LM5164QPWPRQ1, the LT8630IFE#TRPBF uniquely balances ultra-wide 100V input tolerance, integrated PG signaling, and micropower Burst Mode - making it irreplaceable in telecom transient-prone and industrial high-VIN distributed systems where both ruggedness and low-noise light-load operation are mandatory.
Availability
LT8630IFE#TRPBF is available at Aetrix Electronics and suitable for telecom power supplies, industrial distributed regulation, and automotive body control modules requiring stable component supply across extended temperature and high-voltage stress conditions.
Supply support for LT8630IFE#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 LT8630IFE#TRPBF belongs to Analog Devices' µModule®-adjacent high-voltage monolithic buck regulator family, engineered specifically for robust, compact, and efficient power conversion in harsh-input environments like telecom infrastructure and factory-floor equipment.
FAQ
What is the maximum input voltage rating for the LT8630IFE#TRPBF?
The LT8630IFE#TRPBF has an absolute maximum input voltage rating of 100V on the VIN pin, with guaranteed operation from 3V to 100V. This allows direct use in telecom 48V/72V systems and automotive applications subject to load-dump transients. Exceeding 100V risks permanent damage per Absolute Maximum Ratings. The LT8630IFE#TRPBF maintains regulation and protection functions across its full operating range without external clamping components.
Does the LT8630IFE#TRPBF require an external bootstrap diode?
No, the LT8630IFE#TRPBF does not require an external bootstrap diode. It integrates a charge pump and internal circuitry to drive the high-side MOSFET gate via the BST pin, which only needs a 0.1µF capacitor connected between BST and SW. This eliminates diode-related losses and layout complexity. The LT8630IFE#TRPBF's internal bootstrap design supports reliable high-side switching even at minimum on-times down to 150ns.
How does the LT8630IFE#TRPBF achieve 16µA quiescent current?
The LT8630IFE#TRPBF achieves 16µA input quiescent current through low-ripple Burst Mode® operation: during light loads, it delivers brief energy pulses to the output capacitor, then enters deep sleep where most internal circuitry is disabled. In this state, only essential bias circuits remain active. The LT8630IFE#TRPBF sustains this performance at 12VIN→5VOUT with <5mV output ripple - verified in Typical Performance Characteristics Figure G02.
Can the LT8630IFE#TRPBF be used in a tracking configuration with another regulator?
Yes, the LT8630IFE#TRPBF supports output voltage tracking via its TR/SS pin. When driven by an external voltage ramp (e.g., from a master regulator's soft-start pin), the LT8630IFE#TRPBF regulates its output to follow that ramp with ±30mV offset. This enables precise power sequencing in multi-rail systems. The LT8630IFE#TRPBF's TR/SS sink/source capability and internal 4.5µA current source make it compatible with common tracking ICs and microcontroller GPIOs.
What thermal considerations apply to the LT8630IFE#TRPBF's exposed pad?
For the LT8630IFE#TRPBF, the exposed pad (Pin 21) is the sole GND connection and must be soldered to a large, low-thermal-resistance PCB copper area. Thermal resistance is specified as θJC(PAD) = 10°C/W - meaning a 1W dissipation raises junction temperature only 10°C above pad temperature. Failure to solder the pad degrades thermal performance severely and may cause premature thermal shutdown. The LT8630IFE#TRPBF's datasheet mandates this connection for both electrical and thermal integrity.
LT8630IFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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
LT8630IFE#TRPBF FAQ
1.How can I place an order for LT8630IFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8630IFE#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 LT8630IFE#TRPBF reliable?
The price and inventory of LT8630IFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8630IFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8630IFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8630IFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8630IFE#TRPBF?
LT8630IFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8630IFE#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 LT8630IFE#TRPBF?
For technical support, including LT8630IFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8630IFE#TRPBF requirements.
6.How does Aetrix verify that LT8630IFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8630IFE#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 LT8630IFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8630IFE#TRPBF?
All LT8630IFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8630IFE#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 LT8630IFE#TRPBF part is unused and in its original packaging.
Return procedure for LT8630IFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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