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Analog Devices Inc. LTC3810HUH-5#TRPBF
- Part No.:
- LTC3810HUH-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3810HUH-5#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,486
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Product details
Overview
LTC3810HUH-5#TRPBF from Analog Devices (formerly Linear Technology) is a 60V input synchronous step-down switching regulator controller using constant on-time valley current mode control, delivering precise 0.8V ±0.5% reference accuracy, 25MHz error amplifier bandwidth, and 1Ω gate drivers for dual N-channel MOSFETs - ideal for telecom power supplies, automotive DC/DC conversion, and industrial high-voltage systems.
For engineers reviewing the LTC3810HUH-5#TRPBF datasheet, LTC3810HUH-5#TRPBF pinout, LTC3810HUH-5#TRPBF application, or LTC3810HUH-5#TRPBF equivalent, key selection criteria include its 60V max VIN capability, no external sense resistor requirement, programmable cycle-by-cycle current limit, adjustable minimum on-time (<100ns), and H-grade (–40°C to +150°C) junction temperature rating.
Technical Context
The LTC3810HUH-5#TRPBF implements a constant on-time valley current mode architecture where top MOSFET conduction duration is set by an external ION resistor, enabling stable operation across wide input voltage ranges without compensation networks. Its 25MHz error amplifier delivers sub-microsecond load transient response, while internal 0.8V reference with ±0.5% DC accuracy ensures tight output regulation under varying thermal and line conditions.
Gate drive logic supports dual N-channel synchronous rectification with independent TG and BG outputs, each featuring 0.7A peak source/1.5Ω pull-down RDS(ON). Integrated bias control autonomously selects between EXTVCC and output-derived INTVCC for driver supply, and the BOOST/SW floating charge-pump circuit sustains high-side drive during pulse-skip or light-load operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Input Voltage | 60V continuous - enables direct regulation from 48V telecom or 24V/36V automotive battery rails without pre-regulation. |
| Reference Voltage Accuracy | ±0.5% over –40°C to +150°C - guarantees stable 0.8V feedback threshold for precision output voltage setting. |
| Error Amplifier Bandwidth | 25MHz - provides ultra-fast line/load transient recovery, critical for CPU/GPU VRMs and burst-mode digital loads. |
| Min On-Time | <100ns - supports high VIN-to-low VOUT conversion (e.g., 48V→3.3V) at practical switching frequencies without pulse-skipping artifacts. |
| Gate Driver Strength | 1Ω pull-down RDS(ON), 0.7A peak source - drives multiple paralleled MOSFETs or large Qg devices with minimal switching loss. |
| Operating Junction Temp | –40°C to +150°C (H-grade) - qualified for under-hood automotive and high-ambient industrial environments. |
| Shutdown Current | 240µA - enables low-power standby in always-on systems such as telematics or ADAS modules. |
Pinout & Package
Package: 32-lead 5mm × 5mm plastic QFN (UH package) with exposed SGND pad (Pin 33) requiring PCB soldering for thermal and signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VON (Pin 2) | On-time voltage input | Sets comparator trip point for one-shot timer; default 0.7V (grounded) or 2.4V (INTVCC-connected); enables VOUT-proportional on-time in high-VOUT designs. |
| VRNG (Pin 3) | Sense voltage limit set | Programs nominal current sense threshold from 95mV (ground) to 215mV (INTVCC); defines maximum inductor valley current limit. |
| PGOOD (Pin 4) | Open-drain power-good output | Pulled low when VFB deviates >±10% from 0.8V for ≥120µs - provides system-level fault signaling and sequencing control. |
| MODE/SYNC (Pin 5) | Pulse-skip enable / external clock sync | Pull <0.8V for forced continuous mode; pull >0.8V for pulse-skip; accepts external clock for EMI-sensitive applications. |
| ITH (Pin 6) | Error amp compensation / current threshold | 0–2.6V control voltage sets valley current limit; 1.2V = zero-current threshold; used for soft-start ramp and current foldback. |
| VFB (Pin 7) | Feedback input | Connects to resistor divider from VOUT; regulates output by servoing to internal 0.8V reference with ±0.5% accuracy. |
| SS/TRACK (Pin 9) | Soft-start / output tracking input | Capacitor to ground sets soft-start ramp rate (~0.6s/µF); resistive divider enables ratiometric or coincident tracking of secondary rails. |
| SHDN (Pin 12) | Shutdown control | Pull <1.5V to disable both gate drivers and reduce quiescent current to 240µA; enables system-level power management. |
| UVIN (Pin 13) | Input undervoltage lockout | Resistive divider from VIN sets UVLO threshold; internal 0.8V comparator with 10% hysteresis prevents brownout oscillation. |
| NDRV (Pin 14) | External linear regulator pass device drive | Drives gate of NMOS pass transistor for INTVCC LDO; enables efficient bias supply generation from VIN during startup or fault. |
| EXTVCC (Pin 15) | External driver supply input | When >4.7V, powers INTVCC via internal LDO and disables NDRV path - improves efficiency in high-VIN applications. |
| INTVCC (Pin 16) | Main internal supply | Power source for all internal circuits except gate drivers; requires local 0.1µF bypass to SGND (Pin 10). |
| DRVCC (Pin 17) | Bottom gate driver supply | Supplies BG driver; typically tied to INTVCC; requires 1–10µF X5R/X7R capacitor to BGRTN (Pin 20) for stability. |
| BG (Pin 18) | Bottom gate driver output | Drives source-connected N-MOSFET; swings from BGRTN to DRVCC; supports negative BGRTN for Miller-effect shoot-through suppression. |
| BGRTN (Pin 19) | Bottom gate return | Source connection for BG driver; can be biased negative (e.g., –2V) to raise Miller immunity during high dV/dt SW transitions. |
| SENSE– (Pin 20) | Current sense negative input | Kelvin connection to bottom of sense resistor or MOSFET source - rejects PCB trace resistance for accurate valley current sensing. |
| SW (Pin 25) | Switch node | Connection to inductor and bootstrap capacitor; voltage swing = –0.7V to VIN; defines return for TG driver and BOOST capacitor. |
| TG (Pin 26) | Top gate driver output | Floating driver for high-side N-MOSFET; powered from BOOST; returns to SW - enables true high-side gate drive without level shifters. |
| BOOST (Pin 27) | Top gate driver supply | Charged via external Schottky diode from DRVCC to SW; requires 0.1µF X5R capacitor to SW for reliable high-side drive. |
| ION (Pin 31) | On-time current input | Resistor from VIN sets one-shot timer current; determines nominal switching frequency and compensates for VIN variation. |
| SGND (Pin 33) | Signal ground | Exposed pad; must be soldered to PCB; serves as reference for all small-signal pins (VFB, ITH, SS/TRACK, etc.) and thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| No current sense resistor required | Uses MOSFET RDS(ON) for valley current sensing - eliminates power loss, board space, and cost of discrete sense resistor. |
| Programmable cycle-by-cycle current limit | VRNG pin adjusts sense threshold from 95mV to 215mV - enables precise overcurrent protection without changing hardware. |
| Adjustable output voltage tracking/soft-start | SS/TRACK pin supports capacitor-based soft-start (0.6s/µF) or resistive tracking to coordinate multi-rail power-up sequences. |
| Synchronizable to external clock | MODE/SYNC pin accepts external clock up to 2MHz - eliminates beat frequencies and enables deterministic EMI reduction. |
| Output overvoltage protection | PGOOD asserts low and forces M1 off/M2 on during overvoltage - protects downstream loads without external supervision. |
| Integrated bias control with auto-source selection | Automatically switches INTVCC supply between EXTVCC (>4.7V) and output-derived path - maximizes efficiency across input range. |
Applications
| Telecom Base Station Power | Automotive Infotainment Systems |
|---|---|
Use Scenario: Converting 48V intermediate bus to 12V/6A for RF power amplifiers and backhaul radios in outdoor base stations. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-efficiency, high-reliability DC/DC conversion with thermal derating up to +150°C ambient. Use Value: 60V max VIN eliminates need for pre-regulator; H-grade rating ensures long-term reliability in uncooled enclosures. |
Use Scenario: Regulating 12V vehicle battery to 3.3V/5A for head-unit processors and display controllers in dashboards. IC Role / Device Role / Timing Role: High-voltage step-down controller with robust UVLO, PGOOD monitoring, and pulse-skip mode for variable load profiles. Use Value: 240µA shutdown current extends battery life in parked-state; ±0.5% reference maintains SoC accuracy across temperature. |
| Industrial PLC I/O Modules | Networking Switch Power Supplies |
Use Scenario: Generating isolated 5V/3A auxiliary rail from 24V or 48V field bus in programmable logic controllers. IC Role / Device Role / Timing Role: Synchronous buck controller driving dual N-MOSFETs with integrated current limiting and thermal fault handling. Use Value: No sense resistor reduces BOM count; 1Ω gate drivers support paralleled MOSFETs for scalable current capacity. |
Use Scenario: Providing 12V/10A main rail for Ethernet switch ASICs and PHYs in enterprise rack-mounted equipment. IC Role / Device Role / Timing Role: High-bandwidth (25MHz EA) controller delivering fast transient response to bursty packet-processing loads. Use Value: Sub-100ns min on-time enables 48V→12V conversion at 250kHz without duty-cycle limitation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3812-5 | Same 60V max VIN, but lower INTVCC UVLO (4.2V vs 4.2V), identical pinout and feature set; lacks H-grade option (max TJ = 125°C). | Not rated for 150°C junction operation - unsuitable for under-hood automotive or high-ambient industrial use cases. | Select LTC3812-5 only when operating ambient ≤85°C and full H-grade qualification is unnecessary. |
| MP2918GL-Z | Monolithic 60V synchronous buck converter (integrated MOSFETs), not a controller; 0.8V ref ±1%, 12V gate drive, no EXTVCC bias control. | Eliminates external MOSFETs but limits max current to 12A and removes flexibility in FET selection and layout optimization. | Choose MP2918GL-Z for space-constrained, lower-current designs where integration outweighs thermal and efficiency trade-offs. |
Compared with LTC3812-5, the LTC3810HUH-5#TRPBF offers guaranteed 150°C operation and identical controller functionality, while MP2918GL-Z trades design flexibility for integration - making LTC3810HUH-5#TRPBF optimal for high-reliability, thermally demanding, or high-current applications requiring discrete FETs.
Availability
LTC3810HUH-5#TRPBF is available at Aetrix Electronics and suitable for telecom base station power supplies, automotive infotainment systems, and industrial PLC I/O modules requiring stable component supply, extended temperature qualification, and high-voltage synchronous buck control.
Supply support for LTC3810HUH-5#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 acquired Linear Technology in 2017 and maintains its high-performance analog and power management portfolio with rigorous automotive and industrial qualification standards.
The LTC3810HUH-5#TRPBF belongs to Linear's high-voltage synchronous buck controller family, designed specifically for rugged, high-efficiency DC/DC conversion in telecom, automotive, and industrial systems where input voltages reach 60V and ambient temperatures exceed 125°C.
FAQ
What is the maximum input voltage rating for the LTC3810HUH-5#TRPBF?
The LTC3810HUH-5#TRPBF supports up to 60V continuous input voltage, verified per Absolute Maximum Ratings table (SW, SENSE+ voltage = –1V to 70V continuous). This allows direct regulation from 48V telecom buses or 36V automotive systems without pre-regulation stages, and is confirmed in the "High Voltage Operation" feature list and typical application schematic.
Does the LTC3810HUH-5#TRPBF require an external current sense resistor?
No, the LTC3810HUH-5#TRPBF does not require an external current sense resistor. It uses valley current sensing via the SENSE+ and SENSE– pins to monitor either a discrete sense resistor or the RDS(ON) of the bottom MOSFET, as stated in the "No Current Sense Resistor Required" feature and functional description section.
What is the operating temperature range for the LTC3810HUH-5#TRPBF?
The LTC3810HUH-5#TRPBF is an H-grade device rated for –40°C to +150°C junction temperature, explicitly listed in the Order Information table and confirmed in the Absolute Maximum Ratings section. This exceeds standard industrial grade and qualifies it for under-hood automotive and high-ambient industrial deployments.
How does the LTC3810HUH-5#TRPBF achieve fast transient response?
The LTC3810HUH-5#TRPBF achieves fast transient response through its 25MHz error amplifier bandwidth and constant on-time valley current mode architecture. The high-gain, wide-bandwidth EA rapidly corrects VFB deviations, while the valley current control ensures immediate cycle-by-cycle current limiting - both validated in the "Extremely Fast Transient Response" feature and Typical Performance Characteristics (Figure G01).
Can the LTC3810HUH-5#TRPBF be synchronized to an external clock?
Yes, the LTC3810HUH-5#TRPBF supports external clock synchronization via the MODE/SYNC pin (Pin 5), which functions as a phase-locked loop input. When driven with a logic-level clock signal, the rising edge of the external clock synchronizes the rising edge of the TG signal - a capability documented in the Pin Functions section and "Synchronizable to External Clock" feature.
LTC3810HUH-5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.35V ~ 14V
- Frequency - Switching:
- -
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Power Good, Soft Start, Tracking
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC3810HUH-5#TRPBF FAQ
1.How can I place an order for LTC3810HUH-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3810HUH-5#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 LTC3810HUH-5#TRPBF reliable?
The price and inventory of LTC3810HUH-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3810HUH-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3810HUH-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3810HUH-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3810HUH-5#TRPBF?
LTC3810HUH-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3810HUH-5#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 LTC3810HUH-5#TRPBF?
For technical support, including LTC3810HUH-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3810HUH-5#TRPBF requirements.
6.How does Aetrix verify that LTC3810HUH-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3810HUH-5#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 LTC3810HUH-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3810HUH-5#TRPBF?
All LTC3810HUH-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3810HUH-5#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 LTC3810HUH-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3810HUH-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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