My Inquiry
My Account
Analog Devices Inc. LTC3784HGN#TRPBF
- Part No.:
- LTC3784HGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3784HGN#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,258
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3784HGN#TRPBF from Analog Devices (formerly Linear Technology) is a high-performance PolyPhase® synchronous boost controller driving two N-channel MOSFET stages out-of-phase. It supports 4.5V–60V input, delivers up to 60V output, features ±1% 1.200V reference, 28μA quiescent current, and operates down to 2.3V after startup when biased from VOUT - enabling use in industrial power supplies, automotive 12V-to-24V/10A boost converters, and medical battery-backed systems.
For engineers reviewing the LTC3784HGN#TRPBF datasheet, LTC3784HGN#TRPBF pinout, LTC3784HGN#TRPBF application, or LTC3784HGN#TRPBF equivalent, key selection considerations include its dual-phase current-mode control architecture, RSENSE/DCR sensing flexibility, phase-lockable 75kHz–850kHz frequency range, 100% duty cycle capability, and thermal performance in the –40°C to 150°C junction temperature range.
Technical Context
The LTC3784HGN#TRPBF implements constant-frequency current-mode control with two independent, interleaved channels operating 180° out-of-phase. Its error amplifier compares VFB against a precision 1.200V reference, modulating ITH to regulate peak inductor current per phase. The internal oscillator supports programmable fixed frequency (50kHz–900kHz) or PLL synchronization via PLLIN/MODE, enabling precise timing alignment across multi-controller systems.
It integrates dual gate drivers with matched rise/fall times (20ns), top/bottom gate dead-time control (30ns), and a charge-pump boosted floating supply (BOOST1/BOOST2) for synchronous N-MOSFET operation. Current sensing supports both discrete shunt resistors and inductor DCR, with selectable trip thresholds (42mV/68mV/90mV) set by ILIM pin state - critical for accurate overcurrent protection in high-power boost stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V; operates down to 2.3V after startup when VBIAS is powered from VOUT - enables cold-cranking support in automotive applications. |
| Output Voltage Range | Up to 60V; regulated via external resistor divider on VFB - suitable for high-voltage industrial bus generation. |
| Reference Voltage Accuracy | ±1% at 1.200V (1.188V–1.212V); tight tolerance ensures stable output regulation across temperature and load. |
| Quiescent Current | 28μA in pulse-skipping or forced continuous mode; <4μA in shutdown - extends battery life in always-on systems. |
| Switching Frequency Range | Programmable 50kHz–900kHz or PLL-synchronized 75kHz–850kHz - balances efficiency, EMI, and magnetics size. |
| Current Sense Threshold | Selectable 42mV/68mV/90mV via ILIM pin; supports low-loss DCR sensing or high-accuracy RSENSE designs. |
| Thermal Rating | Junction temperature range –40°C to 150°C; SSOP package θJA = 80°C/W - validated for under-hood automotive and harsh industrial environments. |
Pinout & Package
Package: 28-Lead Plastic SSOP (GN), thermally enhanced, rated for –40°C to 150°C operating junction temperature. Exposed pad not present; standard SSOP footprint with 0.025" lead pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| FREQ (Pin 1) | Oscillator frequency control | Resistor-to-GND sets 50kHz–900kHz; direct DC voltage or tie to INTVCC/GND for fixed frequencies - enables EMI optimization and layout-driven frequency selection. |
| PLLIN/MODE (Pin 4) | Light-load mode & external sync input | Configures Burst Mode®, pulse-skipping, or forced continuous operation; accepts external clock for phase locking - essential for noise-sensitive or synchronized multi-phase systems. |
| SENSE1+/SENSE1– (Pins 2,3) | Channel 1 current sense differential input | Accepts 2.3V–60V common-mode voltage; supports RSENSE or DCR sensing with 42–90mV threshold - enables high-side or low-side current monitoring without level-shifting. |
| VFB (Pin 10) | Feedback voltage input | Compares against 1.200V reference; remote sensing minimizes IR drop errors - critical for stable regulation across long PCB traces or cables. |
| PGOOD (Pin 25) | Power-good open-drain output | Asserts low when VFB deviates >±10% for ≥45μs - provides reliable system-level power sequencing and fault signaling. |
| RUN (Pin 6) | Enable/shutdown control | 1.28V threshold with 100mV hysteresis; <0.7V forces ultra-low-IQ shutdown (<4μA) - supports controlled power-up/down and brownout recovery. |
Key Features
| Feature | Design Value |
|---|---|
| PolyPhase® interleaving | Reduces input/output ripple current by up to 50% vs single-phase, cutting required capacitance and EMI filter size - lowers BOM cost and board area in high-current boost designs. |
| Synchronous rectification control | Drives two N-MOSFET pairs with matched gate drive timing and 100% duty cycle capability - eliminates body-diode conduction loss, boosting efficiency above 95% at full load. |
| Flexible current sensing | Supports both precision shunt resistors and lossless inductor DCR sensing with selectable gain - eliminates need for dedicated current-sense amplifiers and reduces thermal stress. |
| Wide VIN operation with low-startup capability | Operates from 4.5V–60V main supply and sustains regulation down to 2.3V after startup when VBIAS is derived from VOUT - enables seamless transition during battery voltage sag. |
| Robust thermal and reliability rating | Specified for –40°C to 150°C junction temperature; includes overtemperature protection and 150°C TJMAX - qualified for under-hood automotive, industrial motor drives, and military-grade power systems. |
Applications
| Automotive 12V-to-24V Power Supply | Industrial 48V Intermediate Bus Generator |
|---|---|
Use Scenario: Boosting vehicle battery (9V–16V) to stable 24V rail for ADAS cameras, radar modules, and infotainment displays. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller managing interleaved switching, current-mode loop regulation, and phase synchronization across multiple units. Use Value: Achieves >94% efficiency at 10A output while reducing input capacitor requirements by 40% and suppressing conducted EMI through phase cancellation. |
Use Scenario: Generating isolated 48V intermediate bus from 24V or 36V industrial DC source for PoE++ switches, servo drives, and PLC I/O modules. IC Role / Device Role / Timing Role: High-voltage boost controller delivering regulated 48V output with ±1% accuracy, using VFB feedback and ITH-based current limiting. Use Value: Enables compact, high-density 200W+ power stages with minimal heatsinking due to 28μA quiescent current and efficient synchronous gate drive. |
| Medical Portable Battery Backup System | Military Ruggedized DC-DC Converter |
Use Scenario: Maintaining uninterrupted 28V output from Li-ion battery pack (24V–32V) during grid failure or transport vibration in portable diagnostic equipment. IC Role / Device Role / Timing Role: Fault-tolerant boost controller with PGOOD monitoring, soft-start (SS pin), and shutdown (RUN pin) for safe battery management integration. Use Value: Ensures clean, glitch-free startup and graceful shutdown; ±10% PGOOD window prevents false trips during transient load steps common in imaging loads. |
Use Scenario: Deploying in airborne or ground-vehicle power systems requiring operation from –40°C to +150°C ambient with MIL-STD-704 compliance. IC Role / Device Role / Timing Role: High-reliability PolyPhase controller with extended temperature grade (H-grade), robust UVLO (3.6V/3.8V), and latch-off overvoltage protection (OVMODE). Use Value: Guarantees functional operation across extreme thermal cycles; 150°C-rated SSOP package eliminates derating concerns in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3784HUFD#TRPBF | Same silicon, 4mm × 5mm QFN package with θJA = 43°C/W - superior thermal performance but requires different PCB land pattern. | Better suited for space-constrained, high-power-density layouts where thermal resistance must be minimized. | Select when board real estate allows QFN and thermal budget demands <43°C/W; verify reflow profile compatibility with exposed pad soldering. |
| LTC3781IGN#TRPBF | Single-phase version; identical feature set except no second channel, PHASMD, CLKOUT, or SENSE2 pins - lower pin count and cost. | Applicable only for ≤10A output or where interleaving benefits are unnecessary. | Choose for simpler, lower-cost designs needing <120W output; avoids unused pins and simplifies routing but forfeits ripple reduction and current sharing. |
Compared with LTC3784HUFD#TRPBF and LTC3781IGN#TRPBF, the LTC3784HGN#TRPBF offers optimal balance of thermal ruggedness (150°C rating), proven SSOP manufacturability, and dual-phase capability - making it the preferred choice for high-reliability, medium-power industrial and automotive boost converters where legacy SSOP assembly lines are in place.
Availability
LTC3784HGN#TRPBF is available at Aetrix Electronics and suitable for industrial power supplies, automotive 12V-to-24V converters, and medical battery backup systems requiring stable component supply, extended temperature qualification, and long-term production continuity.
Supply support for LTC3784HGN#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 full technical and manufacturing continuity for all Linear power products, including rigorous AEC-Q100 and MIL-PRF-38535 compliant test protocols.
The LTC3784HGN#TRPBF belongs to Linear's high-voltage PolyPhase® controller family, designed specifically for high-efficiency, high-reliability DC-DC boost conversion in automotive, industrial, and defense applications demanding wide input range and extended temperature operation.
FAQ
What is the maximum operating junction temperature for the LTC3784HGN#TRPBF?
The LTC3784HGN#TRPBF is specified for a maximum junction temperature of 150°C and guaranteed over the –40°C to 150°C operating junction temperature range. Its SSOP package has a thermal resistance θJA of 80°C/W, so proper PCB copper area and airflow must be maintained to avoid exceeding this limit under full load conditions. Derating guidelines apply above 125°C to ensure long-term reliability.
Does the LTC3784HGN#TRPBF support both RSENSE and inductor DCR current sensing?
Yes, the LTC3784HGN#TRPBF supports both methods. Its SENSE1+/SENSE1– and SENSE2+/SENSE2– inputs accept a common-mode voltage range of 2.3V to 60V and offer selectable current sense thresholds (42mV/68mV/90mV) via the ILIM pin. This allows direct connection to either a precision shunt resistor or the DCR taps of a custom inductor - eliminating external amplifiers and reducing component count.
How does the RUN pin function on the LTC3784HGN#TRPBF?
The RUN pin on the LTC3784HGN#TRPBF provides dual-level enable control: pulling it below 1.28V disables the main control loops, while pulling it below 0.7V places the entire IC into ultra-low-power shutdown (<4μA IQ). An internal 4.5μA current source allows hysteresis programming via external resistors. The pin also includes a 11V clamp, permitting direct connection to VIN through a current-limiting resistor.
Can the LTC3784HGN#TRPBF be synchronized to an external clock?
Yes, the LTC3784HGN#TRPBF supports external synchronization via the PLLIN/MODE pin, which accepts an external clock signal to lock the internal phase-locked loop. When synchronized, the rising edge of BG1 aligns precisely with the external clock's rising edge. This capability enables deterministic timing across multiple LTC3784HGN#TRPBF controllers in multiphase systems, reducing system-level EMI and improving transient response coherence.
What is the purpose of the OVMODE pin on the LTC3784HGN#TRPBF?
The OVMODE pin on the LTC3784HGN#TRPBF selects overvoltage protection behavior and light-load mode during synchronization. When grounded, it enables overvoltage protection (TG1/TG2 forced on until fault clears) and forces continuous conduction mode when synced. When tied to INTVCC, overvoltage protection is disabled and pulse-skipping mode is selected during sync - allowing flexible safety and efficiency trade-offs based on system requirements.
LTC3784HGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
LTC3784HGN#TRPBF FAQ
1.How can I place an order for LTC3784HGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3784HGN#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 LTC3784HGN#TRPBF reliable?
The price and inventory of LTC3784HGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3784HGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3784HGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3784HGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3784HGN#TRPBF?
LTC3784HGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3784HGN#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 LTC3784HGN#TRPBF?
For technical support, including LTC3784HGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3784HGN#TRPBF requirements.
6.How does Aetrix verify that LTC3784HGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3784HGN#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 LTC3784HGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3784HGN#TRPBF?
All LTC3784HGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3784HGN#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 LTC3784HGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC3784HGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3784HGN#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…
