My Inquiry
My Account
Analog Devices Inc. LTC3784EUFD#TRPBF
- Part No.:
- LTC3784EUFD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC3784EUFD#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,877
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3784EUFD#TRPBF from Analog Devices (formerly Linear Technology) is a high-performance PolyPhase® synchronous boost controller driving two N-channel MOSFET stages out-of-phase to reduce input/output capacitance and power supply noise. It operates from 4.5V–60V input (down to 2.3V post-startup), delivers up to 60V output, features ±1% 1.200V reference, RSENSE/DCR current sensing, and 100% duty cycle capability - used in industrial 24V-to-48V telecom power supplies.
For engineers reviewing the LTC3784EUFD#TRPBF datasheet, LTC3784EUFD#TRPBF pinout, LTC3784EUFD#TRPBF application, or LTC3784EUFD#TRPBF equivalent, key selection criteria include phase-lockable frequency (75–850 kHz), low quiescent current (28 µA), programmable current limit thresholds (42–110 mV), thermal performance in 4mm × 5mm QFN (θJA = 43°C/W), and dual-channel gate drive timing (30 ns switch-on delay).
Technical Context
The LTC3784EUFD#TRPBF implements constant-frequency current-mode control with two independent, out-of-phase boost channels. Its error amplifier compares VFB against a precision 1.200V reference, modulating ITH to regulate output voltage while maintaining peak current control via SENSE1+/– and SENSE2+/– inputs with matched thresholds across channels.
It integrates dual gate drivers with 1.2Ω pull-up/pull-down resistance, internal 5.4V LDO (INTVCC), EXTVCC switchover at 4.8V, and a PLL-based synchronization engine supporting 2-/3-/4-/6-/12-phase configurations. The RUN pin enables dual-level shutdown (1.28V for control loop disable, 0.7V for full sleep), and SS pin provides linear soft-start via external capacitor charging at 10 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V; supports wide-system architectures including 12V/24V/48V battery and industrial rails; operates down to 2.3V after startup when VBIAS is powered from VOUT. |
| Output Voltage Range | Up to 60V; set by external resistor divider on VFB; regulated to ±1% of 1.200V reference over temperature and line/load. |
| Switching Frequency | Programmable 50kHz–900kHz or phase-locked 75kHz–850kHz; enables optimization of size, efficiency, and EMI in multi-phase designs. |
| Quiescent Current | 28 µA in pulse-skipping or forced continuous mode; reduces standby power loss in always-on systems like medical monitors. |
| Current Sense Threshold | Selectable 42/75/100 mV via ILIM pin (GND/floating/INTVCC); sets peak inductor current limit with ±12 mV matching between channels. |
| Thermal Performance | θJA = 43°C/W in 28-pin 4mm × 5mm QFN; exposed pad must be soldered to GND for rated thermal dissipation. |
| Gate Drive Capability | Dual N-channel drivers with 20 ns rise/fall time (3300 pF load); 30 ns top-to-bottom and bottom-to-top switch-on delay ensures shoot-through prevention. |
Pinout & Package
Package: 28-lead (4mm × 5mm) plastic QFN (UFD), exposed pad (Pin 29) is GND and must be soldered to PCB ground for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FREQ (Pin 1, 4) | Oscillator frequency control | Resistor-to-GND sets 50–900 kHz; DC voltage or external clock enables precise frequency tuning or synchronization. |
| PLLIN/MODE (Pin 4, 7) | Light-load mode & sync input | Selects Burst Mode® (GND), pulse-skipping (1.2–INTVCC−1.3V), or forced continuous (INTVCC); accepts external clock for phase locking. |
| SENSE1+/–, SENSE2+/– (Pins 2,3,11,12,27,28) | Dual-channel current sense inputs | Accept 2.3–60V common-mode voltage; support RSENSE or DCR sensing; matched ±12 mV threshold tolerance ensures balanced phase current sharing. |
| TG1/TG2, BG1/BG2 (Pins 17,26,19,24) | Top/bottom gate drive outputs | Drive synchronous N-MOSFET gates with 1.2Ω pull-up/down; support 100% duty cycle for high-VIN-to-VOUT ratios. |
| VBIAS (Pin 20) | Main bias supply input | 4.5–60V operating range powers internal circuits; enables operation below 4.5V post-startup when biased from VOUT. |
| INTVCC (Pin 17) | Internal 5.4V LDO output | Powers control logic and gate drivers; decoupled with ≥4.7µF ceramic capacitor; switchover to EXTVCC occurs at 4.8V. |
| RUN (Pin 6, 9) | Enable/shutdown control | 1.28V threshold disables control loops; 0.7V threshold enables ultra-low-IQ (4 µA) shutdown; 4.5 µA sourced current enables hysteresis programming. |
| SS (Pin 7, 10) | Soft-start ramp control | 10 µA internal current charges external capacitor to linearly ramp VFB reference from 0V to 1.2V, preventing inrush current during startup. |
Key Features
| Feature | Design Value |
|---|---|
| PolyPhase® multiphase operation | Enables 2-/3-/4-/6-/12-phase configuration to halve input/output ripple current, reduce capacitor count, and shrink inductor size versus single-phase equivalents. |
| Synchronous rectification control | Drives both top and bottom N-MOSFETs per phase with precise dead-time control (30 ns), eliminating body diode conduction losses and improving efficiency >90% at 10A. |
| Wide-input, high-output voltage capability | Supports 4.5–60V input and up to 60V output in a single controller, enabling direct 12V-to-48V or 24V-to-60V conversion without intermediate stages. |
| Low-quiescent-current light-load modes | Burst Mode® achieves <28 µA IQ at no load while maintaining regulation, critical for battery-powered industrial sensors and portable medical devices. |
| Robust protection architecture | Includes overvoltage protection (OVMODE-selectable), power-good monitoring (PGOOD with 45 µs delay), UVLO on INTVCC (3.6V/3.8V), and thermal shutdown at 150°C junction. |
Applications
| Industrial Telecom Power | Automotive EV Charging Interface |
|---|---|
Use Scenario: 12V vehicle battery powering 48V auxiliary systems in commercial trucks and off-road equipment. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller regulating 48V rail from 12V input with phase interleaving to minimize EMI and input capacitor stress. Use Value: Reduces required input capacitance by ~50% vs single-phase design; 28 µA quiescent current extends battery runtime during idle states. | Use Scenario: Onboard DC-DC stage in EV bidirectional chargers converting 200–400V battery to 12V/24V auxiliary supply. IC Role / Device Role / Timing Role: High-voltage boost controller managing isolated pre-regulator output, synchronized to system clock for noise control in sensitive analog sensor domains. Use Value: 60V absolute max input rating allows safe operation during transient overvoltage events; phase-lockable frequency avoids beat frequencies with main inverter switching. |
| Medical Imaging Power Supply | Military Portable Radios |
Use Scenario: Compact X-ray detector module requiring stable 36V/2A output from 12V input with minimal conducted emissions. IC Role / Device Role / Timing Role: PolyPhase® boost controller operating in forced continuous mode to eliminate low-frequency ripple in analog front-end power rails. Use Value: ±1% reference accuracy and matched current sense thresholds ensure consistent channel current sharing and output regulation under varying load conditions. | Use Scenario: Ruggedized handheld radio needing 28V RF power rail from 12V Li-ion battery with extended shelf life. IC Role / Device Role / Timing Role: Low-IQ boost controller in Burst Mode® delivering regulated 28V output while drawing only 4 µA in deep sleep state. Use Value: 4 µA shutdown current extends 10-year battery shelf life; –40°C to 125°C operating range meets MIL-STD-810H environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3781IUFD#TRPBF | Single-phase only; same 4.5–60V input, 60V output, but lacks PolyPhase® capability and second channel; lower pin count (20-pin QFN). | Not suitable for multiphase current sharing or ripple reduction; limited to ≤15A single-channel designs. | Select when cost, board space, or phase count requirements exclude dual-channel operation. |
| MP24894GQ-Z | Monolithic 60V boost converter (integrated MOSFETs); fixed 500kHz frequency; no phase-locking or PolyPhase® support; 3.5A max output current. | Cannot scale beyond ~3.5A; no external MOSFET flexibility; unsuitable for high-power (>50W) or thermally constrained designs. | Choose for simpler, lower-cost, lower-power applications where integrated FETs reduce BOM count and layout complexity. |
Compared with LTC3781IUFD#TRPBF and MP24894GQ-Z, the LTC3784EUFD#TRPBF uniquely enables scalable, high-efficiency multiphase boost conversion with programmable frequency, ultra-low quiescent current, and robust protection - making it optimal for industrial, automotive, and medical systems demanding >20A output and strict EMI compliance.
Availability
LTC3784EUFD#TRPBF is available at Aetrix Electronics and suitable for industrial telecom power, automotive EV charging interfaces, medical imaging supplies, and military portable radios requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3784EUFD#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-reliability analog and power management portfolio with rigorous qualification standards for industrial, automotive, and aerospace applications.
The LTC3784EUFD#TRPBF belongs to Linear's PolyPhase® synchronous controller product line, designed specifically for high-efficiency, low-noise, multi-phase DC-DC boost conversion in space-constrained, thermally demanding environments.
FAQ
What is the maximum input voltage rating for the LTC3784EUFD#TRPBF?
The LTC3784EUFD#TRPBF has an absolute maximum input voltage rating of 65V on the VBIAS pin. Its functional operating range is 4.5V to 60V, and it can operate down to 2.3V after startup when VBIAS is powered from the output rail. Exceeding 65V risks permanent damage per Absolute Maximum Ratings.
How does the ILIM pin configure current limit thresholds on the LTC3784EUFD#TRPBF?
The ILIM pin on the LTC3784EUFD#TRPBF selects peak current sense voltage thresholds: grounding sets 50 mV, floating sets 75 mV, and connecting to INTVCC sets 100 mV. These values apply identically to both SENSE1 and SENSE2 channels, with matching tolerance of ±12 mV between them, ensuring balanced phase current sharing in PolyPhase® operation.
Can the LTC3784EUFD#TRPBF synchronize to an external clock, and what is the supported frequency range?
Yes, the LTC3784EUFD#TRPBF supports external synchronization via the PLLIN/MODE pin. When driven by an external clock signal, it locks its switching frequency within 75 kHz to 850 kHz, aligning the rising edge of BG1 to the external clock's rising edge. This feature enables noise-sensitive systems to avoid beat frequencies and meet strict EMI requirements.
What thermal derating applies to the LTC3784EUFD#TRPBF in its 4mm × 5mm QFN package?
The LTC3784EUFD#TRPBF in the UFD package has θJA = 43°C/W. Junction temperature is calculated as TJ = TA + (PD × 43). Operating above 125°C junction degrades lifetime; the device is rated for –40°C to 125°C ambient with proper PCB copper area and exposed pad soldering. Thermal shutdown activates at 150°C.
Does the LTC3784EUFD#TRPBF support RSENSE and inductor DCR current sensing simultaneously?
No, the LTC3784EUFD#TRPBF supports either RSENSE or inductor DCR current sensing per channel - not both simultaneously. Each SENSE+/- pair connects to one sensing method: RSENSE uses discrete shunt resistors, while DCR sensing relies on inductor winding resistance with RC filtering. The IC's common-mode range (2.3V–60V) accommodates both methods without level-shifting circuitry.
LTC3784EUFD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 60V
- Frequency - Switching:
- 105kHz ~ 760kHz
- Duty Cycle (Max):
- 96%
- Synchronous Rectifier:
- Yes
- 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:
- 28-QFN (4x5)
LTC3784EUFD#TRPBF FAQ
1.How can I place an order for LTC3784EUFD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3784EUFD#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 LTC3784EUFD#TRPBF reliable?
The price and inventory of LTC3784EUFD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3784EUFD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3784EUFD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3784EUFD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3784EUFD#TRPBF?
LTC3784EUFD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3784EUFD#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 LTC3784EUFD#TRPBF?
For technical support, including LTC3784EUFD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3784EUFD#TRPBF requirements.
6.How does Aetrix verify that LTC3784EUFD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3784EUFD#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 LTC3784EUFD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3784EUFD#TRPBF?
All LTC3784EUFD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3784EUFD#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 LTC3784EUFD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3784EUFD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3784EUFD#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…
