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Analog Devices Inc. LT8627SPJV#TRMPBF
- Part No.:
- LT8627SPJV#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 24-TFQFN Exposed Pad
- Datasheet:
-
LT8627SPJV#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 16A 24LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:547
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Product details
Overview
LT8627SPJV#TRMPBF from Analog Devices is a 18V/16A synchronous step-down Silent Switcher 3 regulator featuring ultralow RMS output noise (3.7 μVRMS, 10Hz–100kHz), 4 nV/√Hz spot noise at 10kHz, and 15 ns minimum on-time. It delivers high efficiency up to 95% at 16A load and supports dynamic voltage control in RF power supplies for PLLs, VCOs, and LNAs.
For engineers reviewing the LT8627SPJV#TRMPBF datasheet, LT8627SPJV#TRMPBF pinout, LT8627SPJV#TRMPBF application, or LT8627SPJV#TRMPBF equivalent, key selection criteria include ultralow noise performance across 0.1Hz–100kHz, PolyPhase® operation support up to 12 phases, forced continuous mode capability, and compatibility with 300kHz–4MHz switching frequencies using external RT resistor.
Technical Context
The LT8627SPJV#TRMPBF implements third-generation Silent Switcher architecture with integrated bypass capacitors and exposed die for thermal management. Its ultralow-noise reference combines with current-mode control and PNP/NPN dual-input error amplifier to maintain <±0.8% output voltage accuracy over temperature with remote sense.
It supports three operating modes via SYNC/MODE pin: pulse-skipping for light-load efficiency, forced continuous mode for fast transient response (<1 μs), and external synchronization. The 24-lead 4mm × 4mm LQFN package includes four GND-exposed pads (pins 25–28) and corner mechanical pins (29–32).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8V to 18V - supports wide industrial and automotive input rails including 3.3V, 5V, and 12V systems. |
| Output Current | 16A continuous - enables single-chip high-current regulation without paralleling. |
| Output Noise (RMS) | 3.7 μVRMS (10Hz–100kHz) - meets stringent low-noise requirements for RF signal chains and precision ADCs. |
| Switching Frequency | 300kHz to 4MHz - adjustable via RT pin resistor; enables compact magnetics and EMI optimization. |
| Min On-Time | 15ns - supports high VIN-to-VOUT ratios (e.g., 12V→1V) at 2MHz+ without pulse skipping. |
| Reference Accuracy | ±0.8% over –40°C to 150°C with remote sense - ensures stable output under thermal stress and board-level IR drop. |
| Package | 24-lead 4mm × 4mm LQFN with exposed thermal pad - enables direct heatsink attachment for >30W dissipation. |
Pinout & Package
LT8627SPJV#TRMPBF uses a 24-lead 4mm × 4mm LQFN package (JEDEC MS-012 variant) with 0.95mm height and exposed GND pad (pins 25–28). Top-side exposed die allows optional heatsink mounting for improved θJA (21°C/W on demo board vs. 33°C/W JEDEC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (5–8) | Main power input | Supplies top MOSFET and internal circuitry; requires ≥4.7µF local ceramic bypass. |
| SVIN (9) | Signal input supply | Must exceed SET voltage by ≥700mV; powers reference and error amp; needs 1µF bypass if separate from PVIN. |
| EN/UVLO (10) | Enable & undervoltage lockout | 1.32V rising threshold with 50mV hysteresis; ties to PVIN for always-on operation. |
| SET (13) | Voltage setpoint input | Sources precise 100µA current; VOUT = 100µA × RSET; bypass capacitor reduces noise but increases startup time. |
| PGFB (16) | Programmable power good feedback | Threshold: 462.5mV–537.5mV; enables fast-start circuitry when pulled to 0.5V. |
| SYNC/MODE (19) | Operating mode control | GND = pulse-skipping; float or INTVCC = forced continuous; external clock = synchronization. |
| CLKOUT (20) | PolyPhase clock output | 50% duty cycle square wave; phase shift controlled by PHMODE pin (90°/120°/180°). |
| GND (3,4,25–28) | Ground return | Four dedicated GND pins + exposed thermal pad; all must be soldered to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow noise reference | 4nV/√Hz at 10kHz and 3.7μVRMS (10Hz–100kHz) - enables direct powering of sensitive RF analog blocks without post-regulation LDOs. |
| Silent Switcher 3 architecture | Integrated bypass capacitors and optimized layout minimize radiated EMI - passes CISPR 32 Class B without external filters. |
| PolyPhase® operation | Up to 12-phase interleaving via CLKOUT and PHMODE - reduces input/output ripple and improves thermal distribution in multi-rail systems. |
| Fast transient response | 1μs recovery from 4A→12A load step - maintains tight regulation in high-speed digital core supplies. |
| Adjustable minimum on-time | 15ns typical - supports high-frequency, high-step-down conversion (e.g., 12V→1V @ 2MHz) without frequency foldback. |
| Remote sense with Kelvin connection | OUTS pin and dedicated SET resistor ground path - compensates for PCB trace IR drop to hold ±0.8% accuracy at load point. |
Applications
| RF Power Supplies | High-Speed Data Converters |
|---|---|
Use Scenario: Powering VCOs, mixers, and LNAs in 5G base station transceivers requiring ultra-clean bias rails. IC Role / Device Role / Timing Role: Primary high-current, low-noise DC/DC converter delivering regulated 1V–3.3V at up to 16A with sub-4μVRMS noise. Use Value: Eliminates need for post-regulation LDOs, reducing BOM count and thermal overhead while meeting phase noise specs for <−160dBc/Hz at 1MHz offset. | Use Scenario: Supplying AVDD/DVDD rails for 16-bit+ SAR ADCs and high-speed DACs in test equipment. IC Role / Device Role / Timing Role: Synchronous buck regulator providing stable, low-ripple supply synchronized to sampling clock via CLKOUT. Use Value: Achieves ENOB >15.5 bits by limiting integrated noise to 3.7μVRMS across full audio band, directly enabling full-resolution digitization. |
| Low-Noise Instrumentation | Industrial PLC I/O Modules |
Use Scenario: Biasing precision op-amps and reference buffers in portable multimeters and calibration sources. IC Role / Device Role / Timing Role: Low-noise, high-accuracy step-down regulator with remote sense for millivolt-level stability at load. Use Value: Maintains ±0.8% output accuracy from –40°C to 150°C and <10ppm/°C drift, enabling 6½-digit measurement repeatability. | Use Scenario: Generating 3.3V/5V rails for isolated digital I/O and analog front-end ASICs in harsh factory environments. IC Role / Device Role / Timing Role: Robust, thermally enhanced DC/DC with 150°C junction rating and fault reporting via PG pin. Use Value: Delivers 16A continuous output with thermal shutdown and power-good signaling - ensures deterministic behavior during brownouts and overloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current, low-noise buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8625SP-1#TRMPBF | Pin-to-pin compatible; lower 12A output current rating; identical noise performance and Silent Switcher 3 architecture. | Best suited for space-constrained designs where 12A suffices and thermal budget is tighter. | Select when peak load ≤12A and board area is premium; retains same layout, compensation, and noise profile. |
| LT8638S#TRPBF | Higher 20A rating; wider 2.8V–42V input range; 5μVRMS noise (vs. 3.7μVRMS); no PolyPhase® or CLKOUT. | Targeted at 24V/48V industrial systems needing higher input tolerance and greater current headroom. | Choose for 24V+ inputs or >16A peak loads; trade-off is higher noise and loss of multi-phase synchronization. |
Compared with LT8625SP-1#TRMPBF, LT8627SPJV#TRMPBF delivers 33% higher output current (16A vs. 12A) in identical footprint, while matching ultralow noise and PolyPhase® capability; versus LT8638S#TRPBF, it offers superior noise performance and clock synchronization at the cost of lower max input voltage (18V vs. 42V).
Availability
LT8627SPJV#TRMPBF is available at Aetrix Electronics and suitable for RF power supplies, high-speed data converters, and low-noise instrumentation requiring stable component supply, RoHS-compliant packaging, and guaranteed 150°C junction operation.
Supply support for LT8627SPJV#TRMPBF 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 precision, industrial, communications, and automotive markets.
The LT8627SP belongs to Analog Devices' Silent Switcher® 3 power management product line, engineered specifically for noise-sensitive applications demanding both high efficiency and sub-5μVRMS output noise in compact, thermally robust packages.
FAQ
What is the maximum continuous output current of the LT8627SPJV#TRMPBF?
The LT8627SPJV#TRMPBF delivers 16A maximum continuous output current under proper thermal conditions - verified with 4mm × 4mm LQFN package mounted on 2-layer demo board with 2oz copper and exposed pad soldered to ground plane. Derating applies above 85°C ambient; full 16A is guaranteed up to 125°C case temperature per datasheet Figure G48.
How does the LT8627SPJV#TRMPBF achieve ultralow output noise?
The LT8627SPJV#TRMPBF achieves 3.7μVRMS (10Hz–100kHz) noise through third-generation Silent Switcher architecture with integrated bypass capacitors, an ultralow-noise 100µA reference, and unity-gain error amplifier design. Its SET pin current source eliminates resistor thermal noise contribution when bypassed, and the PNP/NPN dual-input amplifier maintains low noise across input voltage ranges.
Can the LT8627SPJV#TRMPBF synchronize to an external clock?
Yes, the LT8627SPJV#TRMPBF supports external synchronization via its SYNC/MODE pin (pin 19). When driven with a clean CMOS clock signal, the device locks its internal oscillator and operates in forced continuous mode at the external frequency - enabling precise timing alignment across multiple phases in PolyPhase® configurations.
What thermal enhancements does the LT8627SPJV#TRMPBF package provide?
The LT8627SPJV#TRMPBF uses a 24-lead 4mm × 4mm LQFN with exposed die on the top surface and four dedicated GND-exposed pads (pins 25–28) on the bottom. The top-side die allows optional heatsink attachment, reducing θJA from 33°C/W (JEDEC) to 21°C/W (demo board), while the bottom pads ensure low-impedance thermal and electrical grounding when soldered to PCB copper.
Is the LT8627SPJV#TRMPBF pin-compatible with other Silent Switcher regulators?
Yes, the LT8627SPJV#TRMPBF is explicitly stated as pin-to-pin compatible with the LT8625SP-1#TRMPBF, sharing identical pinout, package dimensions, and footprint. This enables drop-in upgrades from 12A to 16A output capability without PCB redesign - provided thermal management and input capacitance meet the higher current requirement.
LT8627SPJV#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Silent Switcher®3
- Package/Case:
- 24-TFQFN 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):
- 2.8V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0V
- Voltage - Output (Max):
- 17.5V
- Current - Output:
- 16A
- Frequency - Switching:
- 300kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-LQFN (4x4)
LT8627SPJV#TRMPBF FAQ
1.How can I place an order for LT8627SPJV#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8627SPJV#TRMPBF 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 LT8627SPJV#TRMPBF reliable?
The price and inventory of LT8627SPJV#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8627SPJV#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8627SPJV#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8627SPJV#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8627SPJV#TRMPBF?
LT8627SPJV#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8627SPJV#TRMPBF 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 LT8627SPJV#TRMPBF?
For technical support, including LT8627SPJV#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8627SPJV#TRMPBF requirements.
6.How does Aetrix verify that LT8627SPJV#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8627SPJV#TRMPBF 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 LT8627SPJV#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8627SPJV#TRMPBF?
All LT8627SPJV#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8627SPJV#TRMPBF, 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 LT8627SPJV#TRMPBF part is unused and in its original packaging.
Return procedure for LT8627SPJV#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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