My Inquiry
My Account
Analog Devices Inc. LTC3769HFE#TRPBF
- Part No.:
- LTC3769HFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3769HFE#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,281
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3769HFE#TRPBF from Analog Devices (formerly Linear Technology) is a high-performance synchronous boost controller driving all-N-channel MOSFET stages for industrial and automotive DC-DC conversion. It operates from 4.5V to 60V input, delivers up to 60V output, features ±1% 1.200V reference accuracy, 28μA quiescent current, and supports RSENSE or DCR current sensing in a thermally enhanced 20-lead TSSOP package rated for –40°C to 150°C junction temperature.
For engineers reviewing the LTC3769HFE#TRPBF datasheet, LTC3769HFE#TRPBF pinout, LTC3769HFE#TRPBF application, or LTC3769HFE#TRPBF equivalent, key selection criteria include wide VIN range (2.3V post-startup), programmable 50kHz–900kHz switching frequency, phase-lockable operation, 100% duty cycle capability, and integrated power-good monitoring with overvoltage protection.
Technical Context
The LTC3769HFE#TRPBF implements constant-frequency current-mode control with an internal error amplifier comparing VFB to a precision 1.200V reference, modulating ITH to regulate peak inductor current. Its dual-gate drivers support synchronous rectification with programmable dead-time control, enabling high-efficiency boost topologies without external diodes.
It integrates dual LDOs-one powered from VBIAS (4.5V–60V), another switchover-enabled from EXTVCC (up to 14V)-to supply INTVCC at 5.4V with ±2% load regulation. The PLLIN/MODE pin selects light-load behavior (Burst Mode®, pulse-skipping, or forced continuous conduction), while OVMODE configures overvoltage response (latched TG-on or normal regulation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 60V input; operates down to 2.3V after startup when biased from VOUT-enables battery-backed or wide-input industrial systems. |
| VOUT Max | 60V regulated output-supports high-voltage LED strings, industrial sensors, and legacy 48V bus interfaces. |
| Reference Voltage | ±1% 1.200V over –40°C to 150°C-ensures stable output regulation across extended temperature environments. |
| IQ (No Load) | 28μA in pulse-skipping/forced continuous mode-extends runtime in always-on battery-powered applications. |
| Switching Frequency | Programmable 50kHz–900kHz or phase-lockable 75kHz–850kHz-allows EMI optimization and inductor size reduction. |
| Current Sensing | RSENSE or inductor DCR-eliminates sense resistor losses in high-current designs while maintaining accuracy. |
| Shutdown Current | 4μA-minimizes standby drain in safety-critical shutdown states. |
Pinout & Package
Package: 20-Lead Plastic TSSOP (FE), exposed pad (Pin 21) soldered to PCB for thermal and electrical grounding. θJA = 38°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBIAS (Pin 1) | Main bias supply input | Accepts 4.5V–60V; powers internal circuits and enables operation down to 2.3V post-startup when tied to VOUT. |
| PGOOD (Pin 2) | Open-drain power-good indicator | Pulls low when VFB deviates >±10% from 1.200V for ≥45μs-provides reliable system-level fault signaling. |
| ILIM (Pin 3) | Peak current sense threshold select | GND/float/INTVCC sets 50mV/75mV/100mV current limit-configures overcurrent protection without external resistors. |
| GND (Pins 4, 21) | Signal and power ground | Multiple GND pins + exposed pad ensure low-impedance return path and thermal dissipation. |
| PLLIN/MODE (Pin 5) | Light-load mode & sync input | Selects Burst Mode® (GND), pulse-skipping (1.2V–INTVCC–1.3V), or forced CCM (INTVCC); accepts external clock for synchronization. |
| RUN (Pin 6) | Enable/shutdown control | 1.28V threshold for soft shutdown; <0.7V forces full shutdown with 4μA IQ-supports sequenced power-up and fail-safe disable. |
| SS (Pin 7) | Soft-start ramp control | Internal 10μA current charges external capacitor-linearly ramps VOUT to prevent inrush and overshoot. |
| SENSE– (Pin 8) | Negative current sense input | Connects to low-side of sense resistor; common-mode range 2.3V–60V-enables high-side or low-side sensing in noisy environments. |
| SENSE+ (Pin 9) | Positive current sense input | Supplies current comparator bias; supports RSENSE or DCR sensing with ±1μA input current-reduces offset errors. |
| VFB (Pin 10) | Feedback voltage input | Compares to 1.200V reference; ±50nA input current minimizes divider error-enables precise remote sensing. |
| ITH (Pin 11) | Error amplifier output & current limit setpoint | Directly controls peak inductor current; 2mmho transconductance enables stable loop compensation. |
| OVMODE (Pin 12) | Overvoltage response selector | GND enables latched TG-on during overvoltage; INTVCC disables OV latch-configurable safety behavior per system requirements. |
| SW (Pin 13) | Switch node connection | Connects to source of synchronous FET and drain of main FET-high dv/dt node requiring tight layout and low-inductance routing. |
| TG (Pin 14) | Top gate driver output | Drives gate of synchronous N-MOSFET; 1.2Ω pull-up/pull-down enables fast switching with minimal gate charge loss. |
| BOOST (Pin 15) | Floating supply for TG driver | Bypassed to SW via capacitor; supplies bootstrap voltage for high-side gate drive-enables 100% duty cycle operation. |
| BG (Pin 16) | Bottom gate driver output | Drives gate of main N-MOSFET; matched timing with TG ensures controlled dead time and prevents shoot-through. |
| EXTVCC (Pin 18) | External INTVCC supply input | Switchover at 4.5V–5.0V; bypasses VBIAS LDO to reduce power loss-ideal for systems with auxiliary 5V/12V rails. |
| INTVCC (Pins 2, 17) | Internal 5.4V LDO output | Powers gate drivers and control logic; requires ≥4.7μF ceramic capacitor-critical for stable high-current switching. |
Key Features
| Feature | Design Value |
|---|---|
| 100% Duty Cycle Capability | Enables VOUT ≤ VIN operation by sustaining TG-on indefinitely-supports buck-boost-like behavior without external components. |
| Phase-Lockable Frequency (75–850 kHz) | Allows synchronization to system clocks or adjacent converters to eliminate beat frequencies and simplify EMI filtering. |
| Low 28μA Quiescent Current | Extends battery life in portable medical devices and always-on telematics modules without compromising start-up speed. |
| Programmable Light-Load Modes | Burst Mode®, pulse-skipping, or forced CCM selected via single pin-optimizes efficiency across 0.1mA–5A load range. |
| Integrated Power-Good Monitoring | PGOOD asserts only after stable regulation and 45μs debounce-prevents false system resets during transient events. |
| Thermally Enhanced TSSOP | Exposed pad and θJA = 38°C/W enable 5A+ continuous output in compact industrial PCB layouts without heatsinks. |
Applications
| Automotive ADAS Power Supply | Industrial 24V-to-48V Boost Converter |
|---|---|
Use Scenario: Powers radar modules and camera sensors from 12V battery rail with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Synchronous boost controller managing 12V→24V/3A conversion with programmable 400kHz switching to avoid AM band interference. Use Value: 28μA IQ and –40°C to 150°C rating ensure cold-cranking compatibility and long-term reliability in engine bay environments. | Use Scenario: Generates isolated 48V bus for PoE++ switches and industrial Ethernet nodes from standard 24V factory supply. IC Role / Device Role / Timing Role: High-efficiency boost controller delivering 24V→48V/2.5A with RSENSE current sensing and PGOOD sequencing. Use Value: ±1% 1.200V reference and 50kHz–900kHz programmability enable precise output regulation and flexible magnetics selection. |
| Portable Medical Defibrillator Charging | Military UAV High-Voltage Payload Supply |
Use Scenario: Charges high-voltage capacitor bank from Li-ion battery in handheld defibrillators requiring ultra-low standby drain. IC Role / Device Role / Timing Role: Low-IQ boost controller operating from 7.4V to 60V with soft-start and overvoltage lockout for patient safety. Use Value: 4μA shutdown current and 100% duty cycle capability allow safe, controlled energy storage without battery depletion. | Use Scenario: Supplies 60V payload electronics (EO/IR cameras, RF jammers) from 28V aircraft bus under extreme temperature cycling. IC Role / Device Role / Timing Role: Radiation-tolerant-qualified boost controller (MP-grade variant) with phase-lockable frequency for synchronized multi-rail systems. Use Value: –55°C to 150°C operation and 65V absolute max ratings ensure survivability in stratospheric UAV missions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3769HUF#TRPBF | Same architecture and specs, but in 24-pin 4mm × 4mm QFN package with θJA = 47°C/W and –40°C to 150°C rating. | Higher thermal density; preferred for space-constrained PCBs where exposed pad area is limited. | Select when board real estate is critical and thermal management uses internal copper layers instead of top-side heatsinking. |
| LM5122MH/NOPB | TI part with 3V–65V input, 200kHz–2.2MHz frequency, but fixed 1.215V reference (±1.5%), higher 1.5mA IQ, no phase-lock capability. | Lacks Burst Mode® and programmable light-load modes; less suitable for battery longevity-critical applications. | Choose for cost-sensitive industrial designs where wide frequency range outweighs ultra-low IQ and advanced light-load control. |
Compared with LTC3769HUF#TRPBF, the LTC3769HFE#TRPBF offers lower thermal resistance (38°C/W vs 47°C/W) in TSSOP, simplifying heatsinking on double-sided boards; versus LM5122MH/NOPB, it delivers 70× lower quiescent current and deterministic phase-locking-critical for noise-sensitive avionics and medical systems.
Availability
LTC3769HFE#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS power supplies, industrial 24V-to-48V boost converters, and portable medical defibrillator charging systems requiring stable component supply across extended temperature ranges.
Supply support for LTC3769HFE#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 IC portfolio, emphasizing precision power management, signal conditioning, and robust industrial/military-grade solutions.
The LTC3769 belongs to Linear's high-voltage synchronous controller product line, designed specifically for efficient, wide-input boost conversion in harsh-environment applications including automotive, industrial, and aerospace systems.
FAQ
What is the maximum input voltage the LTC3769HFE#TRPBF can withstand?
The LTC3769HFE#TRPBF has an absolute maximum VBIAS rating of 65V. Its operational input range is 4.5V to 60V, and it can sustain operation down to 2.3V after startup when biased from the output rail. This makes the LTC3769HFE#TRPBF suitable for transient-heavy automotive and industrial 48V systems where load dump spikes must be tolerated without damage.
Does the LTC3769HFE#TRPBF support both RSENSE and inductor DCR current sensing?
Yes, the LTC3769HFE#TRPBF supports both RSENSE and inductor DCR current sensing methods. Its SENSE+ and SENSE– inputs feature a 2.3V to 60V common-mode range and ±1μA input bias current, enabling accurate sensing in high-side or low-side configurations. The ILIM pin selects peak sense thresholds (50/75/100mV), making the LTC3769HFE#TRPBF adaptable to efficiency-critical designs where DCR eliminates sense resistor losses.
How does the PGOOD pin on the LTC3769HFE#TRPBF behave during overvoltage conditions?
The PGOOD pin on the LTC3769HFE#TRPBF goes low when VFB deviates more than ±10% from the 1.200V reference for at least 45μs-providing noise-immune power-good signaling. During overvoltage, PGOOD behavior is independent of OVMODE configuration; however, OVMODE determines whether TG is latched on (OVMODE = GND) or regulated normally (OVMODE = INTVCC). Thus, PGOOD remains a reliable system monitor regardless of overvoltage response mode in the LTC3769HFE#TRPBF.
Can the LTC3769HFE#TRPBF operate with 100% duty cycle, and what design benefit does that provide?
Yes, the LTC3769HFE#TRPBF supports true 100% duty cycle operation by sustaining the top gate (TG) drive continuously. This allows the output voltage to track the input voltage when VIN ≥ VOUT-enabling seamless buck-boost behavior without external diodes or complex control schemes. In applications like automotive cold-crank support or industrial brownout ride-through, the LTC3769HFE#TRPBF maintains regulated output even as input sags below nominal, improving system resilience.
What is the purpose of the EXTVCC pin on the LTC3769HFE#TRPBF, and how does it affect efficiency?
The EXTVCC pin on the LTC3769HFE#TRPBF provides an alternative input to the internal 5.4V LDO that powers INTVCC. When EXTVCC exceeds ~4.8V, the device switches from the VBIAS-based LDO to the EXTVCC-based LDO, bypassing the VBIAS regulator's dropout loss. This reduces power dissipation-especially beneficial in high-VIN applications (e.g., 48V input) where VBIAS LDO losses would otherwise degrade overall efficiency. Using EXTVCC improves thermal performance and extends the effective input range of the LTC3769HFE#TRPBF.
LTC3769HFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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:
- 20-TSSOP-EP
LTC3769HFE#TRPBF FAQ
1.How can I place an order for LTC3769HFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3769HFE#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 LTC3769HFE#TRPBF reliable?
The price and inventory of LTC3769HFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3769HFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3769HFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3769HFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3769HFE#TRPBF?
LTC3769HFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3769HFE#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 LTC3769HFE#TRPBF?
For technical support, including LTC3769HFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3769HFE#TRPBF requirements.
6.How does Aetrix verify that LTC3769HFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3769HFE#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 LTC3769HFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3769HFE#TRPBF?
All LTC3769HFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3769HFE#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 LTC3769HFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3769HFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3769HFE#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…
