My Inquiry
My Account
Analog Devices Inc. LTC3864EDE#TRPBF
- Part No.:
- LTC3864EDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC3864EDE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,807
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3864EDE#TRPBF from Analog Devices (formerly Linear Technology) is a high-voltage, peak current-mode synchronous step-down DC/DC controller driving an external P-channel MOSFET for automotive and industrial power supplies. It supports 3.5V–60V input, 0.8V–VIN output, 100% duty cycle operation, 40µA Burst Mode quiescent current, and programmable 50kHz–850kHz switching frequency - enabling robust 5V/2A conversion in wide-input systems such as vehicle infotainment power rails.
For engineers reviewing the LTC3864EDE#TRPBF datasheet, LTC3864EDE#TRPBF pinout, LTC3864EDE#TRPBF application, or LTC3864EDE#TRPBF equivalent, key selection considerations include its P-MOSFET gate drive architecture, verified FMEA-compliant adjacent-pin fault tolerance, ±10% PGOOD accuracy with 100µs delay, 95mV current sense threshold, and thermally enhanced 12-lead 4mm × 3mm DFN package with exposed PGND pad.
Technical Context
The LTC3864EDE#TRPBF implements a constant-frequency, peak current-mode control architecture with slope compensation, where the ITH pin serves as both error amplifier output and current threshold reference (0–2.9V range). Its internal 8V LDO (VIN–VCAP) powers the high-side P-MOSFET gate driver, delivering strong pull-up (2Ω) and pull-down (0.9Ω) capability while maintaining dropout operation down to 3.25V (VIN–VCAP).
Light-load behavior is configurable via PLLIN/MODE: floating enables 40µA Burst Mode with sleep-state disconnection of ITH; grounding selects pulse-skipping mode. Frequency foldback activates when VFB falls below 0.4V (50% of 0.8V reference), reducing switching frequency to ~18% of setpoint to limit inrush and short-circuit current without compromising startup reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 60V - supports direct connection to automotive battery (cold-crank down to 3.5V) and industrial 48V rails. |
| Output Voltage Range | 0.8V to VIN - enables dropout operation at 100% duty cycle when VIN ≤ VOUT, critical for low-VIN backup supplies. |
| Quiescent Current (Burst Mode) | 40µA typical - sustains >100-hour battery runtime in always-on vehicle modules. |
| Switching Frequency | 50kHz to 850kHz (resistor-programmable) - balances EMI, efficiency, and inductor size across 12V/24V/48V systems. |
| Current Sense Threshold | 95mV typical (VIN–SENSE) - sets precise peak inductor current limit independent of temperature drift. |
| PGOOD Accuracy | ±10% window around 0.8V reference - ensures reliable system enable/disable sequencing with 100µs response delay. |
| Gate Driver Strength | Pull-up: 2Ω, Pull-down: 0.9Ω - drives large P-MOSFETs with fast edge rates and minimal shoot-through risk. |
Pinout & Package
Package: 12-lead (4mm × 3mm) plastic DFN with exposed PGND pad (Pin 13), rated for –40°C to +125°C junction temperature. Exposed pad must be soldered to PCB for thermal performance (θJC = 5.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE (12) | P-channel MOSFET gate driver output | High-current push-pull output with 2Ω pull-up / 0.9Ω pull-down; disables below 3.25V (VIN–VCAP). |
| VIN (11) | Main power supply input | Supplies internal circuitry and CAP LDO; requires ≥0.1µF ceramic bypass to PGND. |
| SENSE (10) | Current sense differential input | Kelvin-connected to RSENSE; compares VIN–SENSE voltage to 95mV threshold for cycle-by-cycle current limiting. |
| CAP (9) | Gate bias LDO output (VIN–VCAP) | Regulated 8V (typ.) supply for P-MOSFET gate; requires ≥0.47µF low-ESR ceramic between VIN and CAP. |
| RUN (8) | Enable/shutdown control | 1.26V threshold with 150mV hysteresis; internal 0.4µA pull-up allows direct 60V-compatible logic interface. |
| PGOOD (7) | Open-drain power-good indicator | Pulled low when VFB deviates >±10% from 0.8V or RUN = low; 100µs delay prevents false triggering during transients. |
| ITH (6) | Error amplifier output & current threshold | 0–2.9V analog node; sets peak inductor current via sum with slope compensation ramp. |
| VFB (5) | Feedback voltage input | Regulated to 0.8V nominal; determines output voltage via resistor divider; triggers foldback if <0.4V. |
| SS (4) | Soft-start/tracking control | Internal 10µA pull-up charges external capacitor; output tracks SS voltage when SS < 0.8V. |
| FREQ (2) | Frequency programming input | 20µA current source sets oscillator frequency via external resistor; ground = 350kHz, open = 535kHz. |
| PLLIN/MODE (1) | Sync clock input / light-load mode select | Floating = 40µA Burst Mode; grounded = pulse-skipping; external 75–750kHz clock synchronizes GATE turn-on edge. |
| PGND (13) | Power ground (exposed pad) | Must be soldered to PCB plane; serves as return path for high-current GATE, SENSE, and CAP paths. |
Key Features
| Feature | Design Value |
|---|---|
| 100% duty cycle capability | Enables seamless transition into dropout when VIN drops below VOUT - essential for automotive cold-crank and backup power hold-up. |
| FMEA-verified adjacent-pin fault tolerance | Guaranteed safe operation under open/short faults between any two pins - meets ASIL-B functional safety requirements for automotive ECUs. |
| Programmable Burst Mode (40µA IQ) | Reduces no-load input current by >95% vs. pulse-skipping, extending battery life in always-on telematics and ADAS modules. |
| Integrated 8V gate bias LDO (VIN–VCAP) | Eliminates need for external bootstrap or charge-pump circuitry when driving high-side P-MOSFETs in buck topologies. |
| Frequency foldback on overcurrent | Automatically reduces switching frequency to ~18% of setpoint when VFB < 0.4V - limits peak current during short-circuit without external circuitry. |
| Accurate ±10% PGOOD with 100µs delay | Ensures deterministic power sequencing in multi-rail systems (e.g., SoC + memory + I/O) while rejecting brief line transients. |
Applications
| Automotive Infotainment Power | Industrial 24V/48V DC-DC Conversion |
|---|---|
Use Scenario: Powering 5V/2A display controller and audio codec in head unit with 9–16V battery input and cold-crank dips to 3.5V. IC Role / Device Role / Timing Role: Asynchronous step-down controller regulating output while maintaining 100% duty cycle during low-VIN events. Use Value: Prevents system reset during engine cranking by sustaining regulated 5V output even when battery sags to 3.5V. |
Use Scenario: Generating isolated 3.3V/3A rail from unregulated 24V factory floor supply with high ripple and load transients. IC Role / Device Role / Timing Role: High-voltage buck controller with programmable 350kHz frequency and strong gate drive for low-loss P-MOSFET switching. Use Value: Achieves >92% efficiency at full load while rejecting 200mVpp input ripple via constant-frequency current-mode control. |
| Telecom Distributed Power | Heavy-Duty Equipment Control |
Use Scenario: Intermediate 12V bus converter in 48V telecom shelf supplying multiple point-of-load regulators. IC Role / Device Role / Timing Role: Primary controller synchronizing to system clock via PLLIN/MODE pin to minimize conducted EMI in dense backplane layouts. Use Value: Enables deterministic 750kHz synchronization across multiple LTC3864EDE#TRPBF units, reducing beat frequencies and easing EMI filtering. |
Use Scenario: Powering microcontroller and CAN transceiver in off-highway vehicle ECU exposed to 60V load-dump transients. IC Role / Device Role / Timing Role: Robust buck controller with 60V absolute max VIN rating, UVLO hysteresis, and FMEA-verified fault handling. Use Value: Survives ISO 7637-2 Pulse 5a (60V/100ms) without latch-up or parameter shift, eliminating need for upstream TVS clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3891EMSE#TRPBF | Dual-output controller (channel 1: 4–60V, channel 2: 0.8–24V); includes integrated 5V LDO bias supply; higher IQ (65µA Burst Mode). | Required when dual independent outputs or integrated bias rail needed; larger MSOP-16 package. | Select LTC3891EMSE#TRPBF only if dual-output regulation or internal 5V bias is required - not a drop-in replacement. |
| MP24894GQKT-Z | Monolithic 60V buck converter (integrated MOSFETs); fixed 100kHz–2.2MHz frequency; no P-MOSFET support; lower max VOUT (30V). | Suitable for space-constrained designs where integration outweighs flexibility; lacks 100% duty cycle and FMEA verification. | Choose MP24894GQKT-Z for cost-sensitive, low-complexity 12V→5V conversion - but not for automotive safety-critical or dropout-critical use cases. |
Compared with LTC3864EDE#TRPBF, LTC3891EMSE#TRPBF adds dual-channel flexibility and bias integration at the cost of higher quiescent current and larger footprint, while MP24894GQKT-Z trades design freedom and fault resilience for monolithic simplicity and reduced BOM count.
Availability
LTC3864EDE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment power, industrial 24V/48V DC-DC conversion, and telecom distributed power systems requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC3864EDE#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) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving automotive, industrial, and communications markets with rigorously tested, application-optimized solutions.
The LTC3864EDE#TRPBF belongs to Linear's high-voltage DC/DC controller product line, designed specifically for robust, fault-tolerant power conversion in harsh environments - emphasizing FMEA compliance, wide VIN/VOUT ranges, and ultra-low IQ for always-on systems.
FAQ
What is the maximum input voltage rating for the LTC3864EDE#TRPBF?
The LTC3864EDE#TRPBF has an absolute maximum input voltage rating of 65V on the VIN pin, with continuous operation supported from 3.5V to 60V. This 60V operating上限 enables direct connection to 48V industrial buses and withstands automotive load-dump transients per ISO 7637-2 without external protection.
Does the LTC3864EDE#TRPBF support 100% duty cycle operation, and how is it implemented?
Yes, the LTC3864EDE#TRPBF supports true 100% duty cycle operation by disabling the high-side P-MOSFET gate driver when VIN drops below the programmed VOUT. This allows the output to follow VIN linearly in dropout - a critical feature for automotive cold-crank survival where battery voltage can sag to 3.5V while maintaining regulated output.
How does the LTC3864EDE#TRPBF achieve 40µA quiescent current in Burst Mode?
The LTC3864EDE#TRPBF achieves 40µA quiescent current by disconnecting the ITH pin from the error amplifier output and holding it at 0.55V during sleep mode - shutting down oscillator, gate driver, and most analog circuitry while retaining PGOOD monitoring and RUN detection. This state activates automatically when VFB exceeds the 0.8V reference during light loads.
What package type and thermal characteristics apply to the LTC3864EDE#TRPBF?
The LTC3864EDE#TRPBF uses a 12-lead 4mm × 3mm plastic DFN package with exposed PGND pad (Pin 13). Its thermal resistance is θJC = 5.5°C/W and θJA = 43°C/W. The exposed pad must be soldered to a PCB thermal plane to achieve rated performance and ensure reliable operation at 125°C junction temperature.
Can the LTC3864EDE#TRPBF synchronize to an external clock, and what is the valid frequency range?
Yes, the LTC3864EDE#TRPBF can synchronize to an external clock applied to the PLLIN/MODE pin across 75kHz to 750kHz. The internal PLL aligns the GATE turn-on edge to the rising edge of the external clock, enabling deterministic switching in noise-sensitive or multi-phase systems - with input thresholds of 2V (HI) and 0.5V (LO).
LTC3864EDE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN 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):
- 3.5V ~ 60V
- Frequency - Switching:
- 50kHz ~ 850kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
LTC3864EDE#TRPBF FAQ
1.How can I place an order for LTC3864EDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3864EDE#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 LTC3864EDE#TRPBF reliable?
The price and inventory of LTC3864EDE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3864EDE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3864EDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3864EDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3864EDE#TRPBF?
LTC3864EDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3864EDE#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 LTC3864EDE#TRPBF?
For technical support, including LTC3864EDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3864EDE#TRPBF requirements.
6.How does Aetrix verify that LTC3864EDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3864EDE#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 LTC3864EDE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3864EDE#TRPBF?
All LTC3864EDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3864EDE#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 LTC3864EDE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3864EDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3864EDE#TRPBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
