My Inquiry
My Account
Analog Devices Inc. LTC3769EFE#TRPBF
- Part No.:
- LTC3769EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3769EFE#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,988
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3769EFE#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 supports 4.5V–60V input, delivers up to 60V output, features ±1% 1.200V reference accuracy, 28μA quiescent current, and operates down to 2.3V after startup when biased from VOUT.
For engineers reviewing the LTC3769EFE#TRPBF datasheet, LTC3769EFE#TRPBF pinout, LTC3769EFE#TRPBF application, or LTC3769EFE#TRPBF equivalent, key selection criteria include wide VIN range compatibility, RSENSE/DCR current sensing flexibility, phase-lockable 75kHz–850kHz operation, 100% duty cycle capability, and thermal performance in the 20-lead TSSOP package.
Technical Context
The LTC3769EFE#TRPBF implements constant-frequency current-mode control with dual gate drivers (TG/BG), internal 5.4V LDO (INTVCC), and selectable light-load modes (Burst Mode®, pulse-skipping, forced continuous) via PLLIN/MODE pin configuration. Its error amplifier compares VFB against a precision 1.200V reference to regulate output voltage.
It integrates a programmable oscillator (50kHz–900kHz), phase-locked loop for external synchronization, overvoltage protection (OVMODE-selectable), power-good monitoring (PGOOD), and soft-start ramping via SS pin. Current sensing supports both discrete RSENSE and inductor DCR methods with configurable ILIM thresholds (42mV/68mV/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 powered from VOUT - enables battery backup and wide-system-rail compatibility. |
| Output Voltage Range | Up to 60V - supports high-voltage industrial sensors, LED strings, and auxiliary power rails. |
| Reference Voltage Accuracy | ±1% at 1.200V - ensures tight output regulation across temperature and load for precision power delivery. |
| Quiescent Current | 28μA in no-load operation - extends runtime in always-on or battery-powered systems. |
| Switching Frequency Range | Programmable 50kHz–900kHz or phase-lockable 75kHz–850kHz - balances efficiency, size, and EMI in diverse PCB layouts. |
| Current Sense Thresholds | Selectable 42mV/68mV/90mV via ILIM pin - allows optimization of sense resistor power loss vs. noise immunity. |
| Shutdown Current | 4μA - enables ultra-low-power system-level standby states without external disconnect. |
Pinout & Package
Package: 20-Lead Plastic TSSOP (FE package), 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 supply input | Accepts 4.5V–60V; powers internal circuitry and enables operation down to 2.3V post-startup when tied to VOUT. |
| PGOOD (Pin 2) | Open-drain power-good indicator | Asserts low when VFB deviates >±10% from 1.200V for ≥45μs - provides reliable system-level fault signaling. |
| ILIM (Pin 3) | Current limit threshold select | GND/float/INTVCC sets peak sense voltage to 50mV/75mV/100mV - configures current protection level without external resistors. |
| GND (Pins 4, 21) | Signal and power ground | Multiple ground pins + exposed pad ensure low-impedance return path for gate drive and current sense signals. |
| PLLIN/MODE (Pin 5) | Sync input / light-load mode control | Enables external clock synchronization or selects Burst Mode®/pulse-skipping/forced continuous operation. |
| RUN (Pin 6) | Enable/shutdown control | 1.28V threshold for control-loop disable; <0.7V for full shutdown with 4μA IQ - supports sequenced power management. |
| SS (Pin 7) | Soft-start ramp control | Internal 10μA pull-up charges external capacitor - linearly ramps VOUT during startup to limit inrush current. |
| SENSE– (Pin 8) | Negative current sense input | Connects to low-side of sense resistor or inductor DCR network - common-mode range: 2.3V–60V. |
| SENSE+ (Pin 9) | Positive current sense input | Connects to high-side of sense resistor; supplies bias to current comparator - same common-mode range as SENSE–. |
| VFB (Pin 10) | Feedback voltage input | Compares against 1.200V reference; ±5nA input bias enables high-impedance resistive divider designs. |
| ITH (Pin 11) | Error amplifier output / current limit threshold | Directly sets peak inductor current; used for loop compensation and current limiting in servo loop. |
| OVMODE (Pin 12) | Overvoltage protection mode select | GND enables OV latch-off (TG forced on); INTVCC disables OV action - defines fail-safe behavior under fault conditions. |
| SW (Pin 13) | Switch node connection | Connects to source of synchronous FET and drain of main FET - high dv/dt node requiring careful layout and low-inductance routing. |
| TG (Pin 14) | Top gate driver output | Drives gate of synchronous N-MOSFET; supports 100% duty cycle - critical for high-VIN-to-VOUT ratios. |
| BOOST (Pin 15) | Floating supply for TG driver | Bypassed to SW with ceramic capacitor; charged via Schottky from INTVCC - enables high-side N-FET drive. |
| BG (Pin 16) | Bottom gate driver output | Drives gate of main N-MOSFET; complements TG timing with controlled dead-time - prevents shoot-through. |
| EXTVCC (Pin 18) | External bias input for INTVCC LDO | Enables switchover to external 4.5V–14V supply, bypassing VBIAS LDO - reduces thermal load in high-input-voltage applications. |
| INTVCC (Pins 2, 17) | Internal 5.4V LDO output | Powers gate drivers and control logic; requires ≥4.7μF low-ESR ceramic decoupling - stable local supply essential for noise immunity. |
| FREQ (Pin 3) | Oscillator frequency control | Resistor-to-GND or DC voltage sets 50kHz–900kHz; GND/INTVCC forces 350kHz/535kHz - simplifies EMI tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous N-MOSFET control | Eliminates external Schottky diode losses, enabling >95% efficiency in high-current boost applications like 12V→24V/5A. |
| 100% duty cycle capability | Allows seamless transition to pass-through mode when VIN ≥ VOUT - essential for automotive cold-crank and industrial brownout resilience. |
| Three selectable light-load modes | Burst Mode® (28μA IQ), pulse-skipping, or forced continuous - optimizes efficiency across 100μA–5A load range without external mode control logic. |
| RSENSE or DCR current sensing | Supports either discrete shunt (low-noise, high-accuracy) or inductor DCR (cost-effective, no extra component) - adapts to BOM and layout constraints. |
| Integrated 5.4V INTVCC LDO with EXTVCC switchover | Reduces thermal stress by offloading bias power to external supply when available - improves reliability in 48V industrial systems. |
| Programmable overvoltage response | OVMODE pin selects between active clamp (TG on) or graceful foldback - enables system-specific safety policies per IEC 62368-1 requirements. |
Applications
| Automotive ADAS Power Supply | Industrial Sensor Excitation |
|---|---|
|
Use Scenario: Powering 24V radar modules from 9V–16V vehicle battery with cold-crank support down to 4.5V. IC Role / Device Role / Timing Role: Synchronous boost controller regulating 24V output with 100% duty cycle pass-through during cranking. Use Value: Maintains uninterrupted radar operation during engine start; 28μA quiescent current minimizes battery drain in parked state. |
Use Scenario: Generating precise 36V excitation for strain-gauge bridges in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: High-accuracy boost controller with ±1% 1.200V reference and low-noise current sensing. Use Value: Enables <0.1% full-scale measurement accuracy; RSENSE/DCR flexibility accommodates space-constrained sensor PCBs. |
| Medical Portable Imaging | Military Data Link Transceiver |
|
Use Scenario: Providing isolated 48V bias for CCD/CMOS image sensor arrays in handheld ultrasound devices. IC Role / Device Role / Timing Role: Low-IQ boost controller operating from single-cell Li-ion (2.7V–4.2V) with post-startup 2.3V operation. Use Value: Extends battery life beyond 8 hours per charge; Burst Mode® eliminates audible switching noise during imaging. |
Use Scenario: Delivering ruggedized 28V power to RF power amplifiers in manpack radios operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-qualified (–40°C to +125°C) boost controller with phase-lockable frequency for EMI-controlled environments. Use Value: Meets MIL-STD-810G vibration/temperature specs; PGOOD output interfaces directly with radio's health-monitoring MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8337EDD#TRPBF | Fixed 2MHz switching, integrated 1.5A switch, max 40V output, no DCR sensing, 2.5μA IQ | Targeted at compact, low-power (<5W) applications; lacks programmable frequency and high-VOUT capability | Choose LT8337EDD#TRPBF for space-constrained designs where 40V output and fixed frequency suffice. |
| TPS40210DGQR | Non-synchronous (external diode), 4.5V–52V input, 1.22V ref (±2%), 1.5mA IQ, no PGOOD or soft-start | Lower cost but reduced efficiency and regulation accuracy; requires external components for basic functionality | Choose TPS40210DGQR only when budget constraints outweigh efficiency, thermal, and feature requirements. |
Compared with LT8337EDD#TRPBF and TPS40210DGQR, the LTC3769EFE#TRPBF uniquely combines 60V output capability, ±1% reference, synchronous N-FET drive, and multi-mode light-load control - making it optimal for high-reliability, wide-input industrial and automotive boost converters.
Availability
LTC3769EFE#TRPBF is available at Aetrix Electronics and suitable for industrial motor drives, automotive ADAS subsystems, and medical portable equipment requiring stable component supply, extended temperature operation (–40°C to +125°C), and long-term production continuity.
Supply support for LTC3769EFE#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-performance analog IC portfolio, emphasizing precision, power efficiency, and ruggedness for demanding applications.
The LTC3769EFE#TRPBF belongs to Linear's high-voltage DC-DC controller family, designed specifically for efficient, reliable synchronous boost conversion in harsh environments including automotive, industrial, and medical systems.
FAQ
What is the minimum input voltage for LTC3769EFE#TRPBF after startup?
The LTC3769EFE#TRPBF can operate down to 2.3V after startup when VBIAS is powered from the regulated output (VOUT) or an auxiliary supply. This enables continued operation during deep battery discharge or cold-crank events in automotive systems, provided the initial startup condition meets the 4.5V–60V VBIAS requirement.
Does LTC3769EFE#TRPBF support inductor DCR current sensing?
Yes, the LTC3769EFE#TRPBF supports both discrete RSENSE and inductor DCR current sensing. The SENSE+ and SENSE– pins accept common-mode voltages from 2.3V to 60V, and internal circuitry compensates for DCR temperature drift when used with appropriate RC filtering networks per the datasheet guidelines.
How does the PGOOD pin function on LTC3769EFE#TRPBF?
The PGOOD pin on LTC3769EFE#TRPBF is an open-drain output that pulls low when the feedback voltage (VFB) deviates by more than ±10% from the 1.200V reference for at least 45μs. It remains high during normal regulation and provides a clean, debounced signal for system-level power sequencing and fault detection.
Can LTC3769EFE#TRPBF be synchronized to an external clock?
Yes, the LTC3769EFE#TRPBF supports external synchronization via the PLLIN/MODE pin. When driven by a clean CMOS clock signal, its internal phase-locked loop aligns the BG gate driver's rising edge to the external clock's rising edge - enabling EMI reduction through frequency coordination in multi-rail systems.
What thermal considerations apply to the LTC3769EFE#TRPBF in TSSOP package?
The LTC3769EFE#TRPBF in 20-lead TSSOP has θJA = 38°C/W. To maintain junction temperature ≤125°C, the PCB must incorporate the exposed pad (Pin 21) soldered to a minimum 200mm² copper pour with ≥4 thermal vias. Power dissipation above 0.8W requires additional airflow or heatsinking per thermal simulation.
LTC3769EFE#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3769EFE#TRPBF FAQ
1.How can I place an order for LTC3769EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3769EFE#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 LTC3769EFE#TRPBF reliable?
The price and inventory of LTC3769EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3769EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3769EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3769EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3769EFE#TRPBF?
LTC3769EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3769EFE#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 LTC3769EFE#TRPBF?
For technical support, including LTC3769EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3769EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3769EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3769EFE#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 LTC3769EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3769EFE#TRPBF?
All LTC3769EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3769EFE#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 LTC3769EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3769EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3769EFE#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…
