My Inquiry
My Account
Analog Devices Inc. LTC3769HUF#TRPBF
- Part No.:
- LTC3769HUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC3769HUF#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,048
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3769HUF#TRPBF from Analog Devices (formerly Linear Technology) is a high-performance synchronous boost controller driving all-N-channel MOSFET stages for industrial, automotive, and medical power supplies. It supports 4.5V–60V input, delivers up to 60V output, features ±1% 1.200V reference accuracy, 28μA no-load quiescent current, and operates down to 2.3V after startup when biased from VOUT.
For engineers reviewing the LTC3769HUF#TRPBF datasheet, LTC3769HUF#TRPBF pinout, LTC3769HUF#TRPBF application, or LTC3769HUF#TRPBF equivalent, key selection criteria include wide VIN range compatibility, programmable 50kHz–900kHz switching frequency, RSENSE/DCR current sensing flexibility, 100% duty cycle capability, and thermally enhanced 4mm × 4mm QFN package with exposed GND pad.
Technical Context
The LTC3769HUF#TRPBF implements constant-frequency current-mode control with dual gate drivers (TG/BG), internal 5.4V LDO (INTVCC), and selectable light-load operation-Burst Mode®, pulse-skipping, or forced continuous conduction-via PLLIN/MODE pin logic. Its error amplifier compares VFB against a precision 1.200V reference to regulate output voltage.
It integrates phase-lockable oscillator (75kHz–850kHz), overvoltage protection (OVMODE-selectable), power-good monitoring (PGOOD), soft-start ramping (SS pin), and dual power inputs (VBIAS and EXTVCC) enabling efficient biasing from either input or output rails. The controller supports both RSENSE and inductor DCR current sensing with three programmable peak sense thresholds (42/68/90mV).
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 battery-backed or wide-input industrial systems. |
| Output Voltage Range | Up to 60V - supports high-voltage LED drivers, medical imaging supplies, and industrial sensors requiring >24V rails. |
| Reference Voltage Accuracy | ±1% at 1.200V - ensures tight output regulation across temperature and load without external trimming. |
| Quiescent Current | 28μA in no-load operation - extends runtime in battery-powered portable equipment and always-on subsystems. |
| Switching Frequency Range | 50kHz to 900kHz (programmable) or 75kHz to 850kHz (PLL-synchronized) - allows EMI optimization and inductor size reduction. |
| Current Sense Options | RSENSE or inductor DCR sensing - eliminates need for dedicated sense resistor in cost-sensitive or space-constrained designs. |
| Package | 24-pin 4mm × 4mm QFN with exposed thermal pad - provides low θJA = 47°C/W for high-power density boost converters. |
Pinout & Package
Thermally enhanced 24-lead plastic QFN (4mm × 4mm) with exposed GND pad (Pin 25). Requires soldering of exposed pad to PCB for rated electrical performance and thermal dissipation (TJMAX = 150°C, θJA = 47°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBIAS (Pin 1) | Main supply input | Accepts 4.5V–60V; powers internal circuits and charge pump - can be tied to VIN or VOUT for extended low-VIN operation. |
| PGOOD (Pin 2) | Open-drain status indicator | Pulls low when VFB deviates >±10% from 1.200V - enables system-level fault detection with 45μs debounce. |
| ILIM (Pin 3) | Peak current threshold select | GND/float/INTVCC sets 50/75/100mV sense threshold - configures current limit without external resistors. |
| INTVCC (Pins 5, 22) | Internal 5.4V LDO output | Supplies gate drivers and control logic; requires ≥4.7μF ceramic bypass - decoupling critical for stable high-current switching. |
| FREQ (Pin 7) | Oscillator programming | Resistor-to-GND or DC voltage sets 50kHz–900kHz frequency - enables EMI spread-spectrum tuning or fixed-frequency design. |
| GND (Pins 8, 10, 24, Exposed Pad 25) | Signal and thermal ground | All pins must connect to common ground plane; exposed pad soldering mandatory for thermal reliability. |
| PLLIN/MODE (Pin 9) | Sync input / light-load mode control | Accepts external clock (75kHz–850kHz) or selects Burst Mode®/pulse-skipping/forced CCM - determines efficiency vs. noise trade-off. |
| RUN (Pin 11) | Enable/shutdown control | 1.28V threshold shuts down control loop; <0.7V reduces IQ to 4μA - supports sequenced power-up and ultra-low standby. |
| SS (Pin 12) | Soft-start ramp generator | 10μA internal current charges external capacitor - controls VOUT rise time to prevent inrush and overshoot. |
| SENSE– / SENSE+ (Pins 13, 14) | Differential current sense inputs | Support 2.3V–60V common-mode range; enable accurate current limiting with RSENSE or DCR - critical for overcurrent protection integrity. |
| VFB (Pin 15) | Feedback input | Compares remote output voltage against 1.200V reference - sets regulated output via external resistor divider. |
| ITH (Pin 16) | Error amplifier output / current limit setpoint | Voltage determines peak inductor current - links output regulation directly to current-mode stability. |
| OVMODE (Pin 17) | Overvoltage response selector | GND enables OV shutdown (TG forced on); INTVCC disables OV action - configurable safety behavior for mission-critical systems. |
| SW (Pin 18) | Switch node connection | Connects to source of sync FET, drain of main FET, and inductor - high dv/dt node requiring careful layout. |
| TG (Pin 19) | Top gate driver output | Drives gate of synchronous N-channel MOSFET - supports 100% duty cycle for VIN ≈ VOUT applications. |
| BOOST (Pin 20) | Floating supply for TG driver | Bypassed to SW with ceramic capacitor - enables high-side gate drive above VOUT using charge pump. |
| BG (Pin 21) | Bottom gate driver output | Drives gate of main N-channel MOSFET - complements TG for synchronous rectification. |
| EXTVCC (Pin 23) | External bias input | Enables 5.4V LDO when >4.7V - bypasses VBIAS LDO to reduce heat in high-input-voltage applications. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous N-channel MOSFET control | Eliminates external Schottky diode, increasing efficiency by 5–10% and reducing thermal stress in 120W boost converters. |
| Programmable light-load modes | Burst Mode® (28μA IQ), pulse-skipping, or forced CCM - optimizes efficiency across 100μA–5A load range without external circuitry. |
| DCR or RSENSE current sensing | Reduces BOM count and board area by eliminating discrete sense resistor; maintains accuracy over temperature with DCR compensation. |
| 100% duty cycle capability | Allows seamless transition from step-up to pass-through operation - essential for automotive cold-crank (VIN dips to 2.3V) and backup power systems. |
| Phase-lockable oscillator | Enables synchronization to system clock or other converters - suppresses beat frequencies and simplifies EMI filtering in multi-rail power systems. |
| Robust overvoltage protection | OVMODE-selectable response (latch-off or continue operation) - meets IEC 62368-1 and ISO 26262 functional safety requirements for medical and automotive use. |
Applications
| Industrial Motor Drives | Automotive ADAS Power Rails |
|---|---|
Use Scenario: Boosting 12V battery to 24V/5A for servo motor controllers in factory automation systems. IC Role / Device Role / Timing Role: Primary synchronous boost controller managing power stage timing, current regulation, and fault signaling. Use Value: 95% peak efficiency at full load and 28μA quiescent current extend uptime during intermittent operation while meeting EN 61000-6-3 EMI limits. | Use Scenario: Generating stable 12V rail from vehicle battery (6V–16V) for radar and camera modules in autonomous driving systems. IC Role / Device Role / Timing Role: High-reliability boost controller with cold-crank support (2.3V start-up) and programmable OVP for ASIL-B compliance. Use Value: 150°C operating junction temperature rating and robust UVLO hysteresis ensure uninterrupted operation during engine cranking transients. |
| Medical Imaging Power Supplies | Portable Test Equipment |
Use Scenario: Providing isolated 60V bias for X-ray detector arrays requiring low-noise, tightly regulated output. IC Role / Device Role / Timing Role: Precision voltage regulator with ±1% reference and PGOOD monitoring for system health reporting. Use Value: Programmable 50kHz–900kHz frequency avoids sensitive RF bands; soft-start prevents sensor damage during power-up. | Use Scenario: Battery-powered handheld oscilloscope needing 24V rail from single Li-ion cell (2.7V–4.2V) with minimal standby drain. IC Role / Device Role / Timing Role: Ultra-low-IQ boost controller enabling >100-hour battery life in sleep mode. Use Value: 4μA shutdown current and Burst Mode® operation preserve battery capacity during idle periods without compromising wake-up speed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3769EUF#TRPBF | Same silicon, rated for –40°C to 125°C junction temperature (vs. –40°C to 150°C for H-grade) | Suitable for commercial/industrial environments without extended thermal stress | Select when ambient temperatures remain below 105°C and cost sensitivity outweighs extended temperature margin. |
| MP24894GQ-Z | Monolithic 60V synchronous boost IC (integrated MOSFETs); lower IQ (15μA) but fixed 500kHz frequency and no DCR sensing | Compact, low-component-count solution for ≤5A loads where programmability is secondary to size | Choose for space-constrained consumer or portable designs where integrated FETs simplify layout and reduce BOM. |
Compared with LTC3769EUF#TRPBF, the LTC3769HUF#TRPBF offers guaranteed operation up to 150°C junction temperature for under-hood automotive or high-ambient industrial use; versus MP24894GQ-Z, it provides full external FET control, DCR/RSENSE flexibility, and wide frequency programmability at the cost of higher design complexity.
Availability
LTC3769HUF#TRPBF is available at Aetrix Electronics and suitable for industrial motor drives, automotive ADAS power rails, and medical imaging power supplies requiring stable component supply, extended temperature operation, and long-term lifecycle support.
Supply support for LTC3769HUF#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 continues its legacy of high-performance analog and power management ICs for demanding applications.
The LTC3769 product line delivers high-efficiency, high-voltage synchronous boost controllers targeting industrial, automotive, and medical systems where reliability, wide input range, and precise regulation are critical.
FAQ
What is the maximum operating junction temperature for the LTC3769HUF#TRPBF?
The LTC3769HUF#TRPBF is specified for operation up to 150°C junction temperature, validated across the full –40°C to 150°C ambient range with appropriate PCB thermal design. This rating exceeds the –40°C to 125°C specification of the E-grade variant and supports under-hood automotive and high-temperature industrial deployments where the LTC3769HUF#TRPBF must sustain continuous operation without derating.
How does the ILIM pin configure current limit thresholds on the LTC3769HUF#TRPBF?
The ILIM pin on the LTC3769HUF#TRPBF selects one of three peak current sense thresholds: grounding sets 50mV, floating sets 75mV, and connecting to INTVCC sets 100mV. These values correspond directly to the VSENSE(MAX) parameter in the datasheet and determine the maximum allowable voltage across the current sense element - enabling rapid configuration of overcurrent protection without external resistors or calibration.
Can the LTC3769HUF#TRPBF operate with input voltage below 4.5V?
Yes - the LTC3769HUF#TRPBF can operate down to 2.3V after startup when VBIAS is powered from the output rail (VOUT) or an auxiliary supply, though the absolute minimum VBIAS rating remains 4.5V. This "bootstrap" operation enables cold-crank support in automotive systems and brownout resilience in battery-powered equipment where the LTC3769HUF#TRPBF must maintain regulation despite severe input sags.
What is the purpose of the EXTVCC pin on the LTC3769HUF#TRPBF?
The EXTVCC pin on the LTC3769HUF#TRPBF provides an alternative input to the internal 5.4V LDO that powers gate drivers and control circuitry. When EXTVCC exceeds 4.7V, it disables the VBIAS LDO and sources INTVCC directly - reducing power dissipation and thermal load in high-input-voltage applications, thereby improving overall system efficiency and reliability of the LTC3769HUF#TRPBF.
Does the LTC3769HUF#TRPBF support synchronization to an external clock?
Yes - the LTC3769HUF#TRPBF supports phase-lockable operation via the PLLIN/MODE pin, accepting external clock signals from 75kHz to 850kHz. This feature enables precise timing alignment with system clocks or other power converters, minimizing beat frequencies and easing EMI compliance testing - a key advantage of the LTC3769HUF#TRPBF in multi-rail industrial and automotive platforms.
LTC3769HUF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Number of Outputs:
- 1
- Output Phases:
- 1
- 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:
- 24-QFN (4x4)
LTC3769HUF#TRPBF FAQ
1.How can I place an order for LTC3769HUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3769HUF#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 LTC3769HUF#TRPBF reliable?
The price and inventory of LTC3769HUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3769HUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3769HUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3769HUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3769HUF#TRPBF?
LTC3769HUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3769HUF#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 LTC3769HUF#TRPBF?
For technical support, including LTC3769HUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3769HUF#TRPBF requirements.
6.How does Aetrix verify that LTC3769HUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3769HUF#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 LTC3769HUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3769HUF#TRPBF?
All LTC3769HUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3769HUF#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 LTC3769HUF#TRPBF part is unused and in its original packaging.
Return procedure for LTC3769HUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3769HUF#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…
