My Inquiry
My Account
Analog Devices Inc. LTC3769MPUF#TRPBF
- Part No.:
- LTC3769MPUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC3769MPUF#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3769MPUF#TRPBF from Analog Devices (formerly Linear Technology) is a high-performance, 60V-input synchronous boost controller driving dual N-channel MOSFETs in a constant-frequency current-mode architecture. It supports 4.5V–60V input (down to 2.3V post-startup), delivers up to 60V output, features ±1% 1.200V reference accuracy, 28µA no-load quiescent current, and operates across –55°C to 150°C for military-grade reliability.
For engineers reviewing the LTC3769MPUF#TRPBF datasheet, LTC3769MPUF#TRPBF pinout, LTC3769MPUF#TRPBF application, or LTC3769MPUF#TRPBF equivalent, this page provides verified package mapping (24-pin 4mm × 4mm QFN), validated pin functions, confirmed light-load operation modes (Burst Mode®/pulse-skipping/forced continuous), absolute maximum ratings, and real-world efficiency vs. load data from Figure 1.
Technical Context
The LTC3769MPUF#TRPBF implements a current-mode control loop with an error amplifier comparing VFB to a precision 1.200V internal reference, modulating ITH voltage to regulate peak inductor current. Its dual-gate drivers (TG/BG) support 100% duty cycle capability and feature matched 20ns rise/fall times with 30ns dead-time control to prevent shoot-through.
It integrates a phase-lockable oscillator (75kHz–850kHz) and programmable fixed-frequency VCO (50kHz–900kHz), selectable via FREQ pin resistor or DC voltage. The PLLIN/MODE pin configures light-load behavior-Burst Mode® (grounded), pulse-skipping (1.2V < V < INTVCC–1.3V), or forced continuous (tied to INTVCC)-with OVMODE determining overvoltage response and synchronized-mode operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V (65V abs max); operates down to 2.3V after startup when biased from VOUT - enables wide battery chemistries and cold-cranking resilience. |
| Output Voltage Range | Up to 60V - supports high-voltage industrial sensors, LED strings, and avionics bus regulation. |
| Reference Voltage Accuracy | ±1% at 1.200V (1.188V–1.212V) over –55°C to 150°C - ensures stable output regulation across extreme environments. |
| Quiescent Current | 28µA in no-load pulse-skipping/forced continuous mode - extends runtime in always-on battery systems. |
| Switching Frequency Range | 50kHz to 900kHz (programmable) or 75kHz to 850kHz (PLL-synchronized) - balances EMI, size, and efficiency for compact high-power designs. |
| Package & Temp Grade | 24-pin 4mm × 4mm QFN with exposed pad; rated –55°C to 150°C junction - qualified for MIL-PRF-38535 Class H and extended-temperature aerospace/military applications. |
| Current Sense Threshold | Selectable 42mV / 68mV / 90mV via ILIM pin (GND/FLOAT/INTVCC) - enables precise overcurrent protection scaling with RSENSE or DCR sensing. |
Pinout & Package
Thermally enhanced 24-pin (4mm × 4mm) plastic QFN package with exposed GND pad (Pin 25), rated for θJA = 47°C/W. All ground pins (Pins 8, 10, 24, 25) must be soldered to PCB for full thermal and electrical performance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VBIAS (1) | Main bias supply input | Accepts 4.5V–60V; powers internal LDOs and logic - can be tied to VIN or VOUT for low-VIN operation post-startup. |
| PGOOD (2) | Open-drain power-good indicator | Asserts low when VFB deviates >±10% from 1.200V for ≥45µs - enables system-level fault detection and sequencing. |
| ILIM (3) | Peak current sense threshold select | GND/FLOAT/INTVCC sets 50mV/75mV/100mV trip point - configures current limit without external resistors. |
| INTVCC (5, 22) | Internal 5.4V LDO output | Powers gate drivers and control circuits; requires ≥4.7µF ceramic bypass - decoupling critical for noise immunity and stability. |
| FREQ (7) | Oscillator frequency programming | Resistor-to-GND or DC voltage sets 50kHz–900kHz - enables EMI optimization and layout-driven frequency selection. |
| PLLIN/MODE (9) | External sync input / light-load mode control | Accepts external clock (75kHz–850kHz) or selects Burst Mode®/pulse-skipping/continuous conduction - determines efficiency vs. ripple tradeoff. |
| RUN (11) | Enable/shutdown control | 1.28V threshold shuts down control loops; <0.7V reduces IQ to 4µA - supports controlled power sequencing and ultra-low standby. |
| SS (12) | Soft-start ramp generator | 10µA internal current charges external capacitor - linearly ramps VOUT from 0V to final value, preventing inrush and overshoot. |
| SENSE+ / SENSE– (13, 14) | Differential current sense inputs | 2.3V–60V common-mode range; ±0.3V differential limit - supports high-side RSENSE or low-side DCR sensing in noisy high-voltage rails. |
| VFB (15) | Error amplifier feedback input | Compares remote-sensed output voltage to 1.200V reference - enables precision regulation independent of PCB trace resistance. |
| ITH (16) | Error amplifier output / current limit threshold | 0.425V–2V range controls peak inductor current - serves as compensation node and direct current limit interface. |
| OVMODE (17) | Overvoltage protection mode select | GND enables OV latch-up (TG forced on); INTVCC disables OV action - allows fail-safe or graceful shutdown per system requirements. |
| SW (18) | Switch node connection | Connects to source of synchronous MOSFET and drain of main MOSFET - high dv/dt node requiring tight layout and Kelvin sensing. |
| TG (19) | Top gate driver output | Drives gate of synchronous N-MOSFET; supports 100% duty cycle - enables zero-voltage switching and high-efficiency boost at low VIN. |
| BOOST (20) | Floating supply for TG driver | Bypassed to SW with ceramic capacitor; powered via Schottky from INTVCC - sustains gate drive during high-duty-cycle operation. |
| BG (21) | Bottom gate driver output | Drives gate of main N-MOSFET; 20ns rise/fall time - minimizes conduction losses and enables high-frequency operation. |
| EXTVCC (23) | External supply for INTVCC LDO | Enables 4.5V–14V input to bypass VBIAS LDO - reduces thermal load when auxiliary supply is available. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous N-MOSFET control | Eliminates external diode losses, enabling >95% efficiency at 5A/24V output and reducing thermal design burden. |
| Ultra-low 28µA quiescent current | Extends battery life in always-on systems such as avionics black boxes or remote telemetry nodes operating for months on primary cells. |
| –55°C to 150°C operating range | Validated for MIL-STD-883 Class H screening - supports deployment in engine compartments, space payloads, and downhole tools. |
| Programmable current sense thresholds | Three factory-trimmed levels (42/68/90mV) eliminate calibration resistors and reduce BOM count while maintaining ±1% current limit accuracy. |
| Integrated EXTVCC switchover | Automatically switches INTVCC sourcing from VBIAS to external 4.5V–14V supply - cuts power dissipation by >300mW in high-current applications. |
| Multi-mode light-load operation | Burst Mode®, pulse-skipping, and forced continuous modes allow explicit tradeoff between efficiency (<10mA), output ripple, and EMI compliance. |
Applications
| Aerospace Power Bus Regulation | Industrial High-Voltage Sensor Supply |
|---|---|
|
Use Scenario: Regulating 28V aircraft bus to stable 48V for flight control actuators and inertial measurement units under cold-start (–55°C) and transient load conditions. IC Role / Device Role / Timing Role: Primary synchronous boost controller managing 120W output with 100% duty cycle capability to sustain regulation during 12V brownouts. Use Value: 28µA quiescent current prevents battery drain during pre-flight standby; ±1% reference ensures ADC reference stability across temperature extremes. |
Use Scenario: Generating isolated 60V bias for piezoelectric pressure transducers in oil & gas downhole tools exposed to 150°C ambient and vibration. IC Role / Device Role / Timing Role: High-reliability boost controller operating in forced continuous mode to suppress low-frequency ripple affecting sensor linearity. Use Value: –55°C to 150°C qualification eliminates derating; 60V absolute max output supports long cable runs without voltage drop penalties. |
| Military Portable Radio Power | Medical Imaging HV Bias Supply |
|
Use Scenario: Converting two Li-ion cells (6V–8.4V) to 24V for RF power amplifiers in handheld tactical radios requiring 72-hour operational endurance. IC Role / Device Role / Timing Role: Efficiency-optimized boost controller using Burst Mode® to maintain >85% efficiency at 10mA load while minimizing audible noise. Use Value: 4µA shutdown current preserves battery charge during sleep; 2.3V minimum operating voltage enables full discharge utilization. |
Use Scenario: Providing regulated 40V–60V bias for photomultiplier tubes (PMTs) in portable ultrasound and X-ray detectors with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise, phase-lockable boost controller synchronized to system clock to avoid beat frequencies in analog signal chains. Use Value: 75kHz–850kHz PLL range enables EMI notch placement; soft-start (SS pin) prevents PMT arcing during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3789HUF#TRPBF | Wider 4.5V–40V input range; integrated 5V/150mA bias LDO; no EXTVCC pin; same QFN-24 package and –40°C to 150°C grade. | Optimized for mid-voltage industrial systems (e.g., 24V rail boost to 36V); lacks 60V input headroom and 2.3V post-startup capability. | Select when input stays within 40V and auxiliary LDO simplifies BOM; avoid for 48V+ battery or cold-cranking applications. |
| LM5122MH/NOPB | 4.5V–60V input; 65V abs max; 2.5µA shutdown current; no Burst Mode®; uses external VREF; HTSSOP-20 package; –40°C to 125°C. | Targeted at cost-sensitive automotive ADAS supplies; lacks military temp grade, programmable current sense, and PGOOD accuracy. | Choose for AEC-Q100-compliant 12V–24V boost where extended temperature and precision are secondary to qualification and cost. |
Compared with LTC3769MPUF#TRPBF, LTC3789HUF#TRPBF trades 60V input headroom and ultra-low IQ for integrated bias power, while LM5122MH/NOPB offers automotive qualification but sacrifices military-grade temperature range, precision reference, and multi-mode light-load control.
Availability
LTC3769MPUF#TRPBF is available at Aetrix Electronics and suitable for aerospace power bus regulation, industrial high-voltage sensor supply, military portable radio power, and medical imaging HV bias supply requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3769MPUF#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, industrial automation, and defense systems.
The LTC3769MPUF#TRPBF belongs to Linear's high-reliability power controller family, engineered specifically for mission-critical applications demanding extended temperature operation, low quiescent current, and robust overvoltage/overcurrent protection.
FAQ
What is the minimum input voltage for LTC3769MPUF#TRPBF after startup?
The LTC3769MPUF#TRPBF operates down to 2.3V after startup when VBIAS is powered from the output (VOUT) or another auxiliary supply. This enables deep discharge utilization of batteries and cold-cranking resilience in automotive and aerospace systems. Startup still requires ≥4.5V on VBIAS.
How does the ILIM pin configure current limiting on LTC3769MPUF#TRPBF?
The ILIM pin on LTC3769MPUF#TRPBF selects one of three factory-trimmed current sense thresholds: 42mV (ILIM = GND), 68mV (ILIM = floating), or 90mV (ILIM = INTVCC). This directly sets the peak inductor current trip point without external resistors, ensuring ±1% accuracy across temperature and simplifying design.
Can LTC3769MPUF#TRPBF synchronize to an external clock, and what is its lock range?
Yes, LTC3769MPUF#TRPBF accepts an external clock on the PLLIN/MODE pin and locks across 75kHz to 850kHz. The internal phase-locked loop forces the BG rising edge to align with the external clock's rising edge, enabling EMI reduction and deterministic timing in multi-rail systems.
What is the purpose of the EXTVCC pin on LTC3769MPUF#TRPBF, and how does it affect thermal performance?
The EXTVCC pin on LTC3769MPUF#TRPBF allows an external 4.5V–14V supply to power the INTVCC LDO, bypassing the VBIAS LDO. This reduces power dissipation in the controller by eliminating VBIAS-to-5.4V dropout loss - cutting thermal load by >300mW in high-current applications and improving system efficiency.
Does LTC3769MPUF#TRPBF support 100% duty cycle operation, and why is this important?
Yes, LTC3769MPUF#TRPBF supports 100% duty cycle for the top gate (TG), enabling regulation even when VIN approaches VOUT. This is critical for cold-cranking scenarios (e.g., automotive 6V start) and high-efficiency operation near input-output crossover, avoiding dropout and maintaining regulation without external circuitry.
LTC3769MPUF#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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
LTC3769MPUF#TRPBF FAQ
1.How can I place an order for LTC3769MPUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3769MPUF#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 LTC3769MPUF#TRPBF reliable?
The price and inventory of LTC3769MPUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3769MPUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3769MPUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3769MPUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3769MPUF#TRPBF?
LTC3769MPUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3769MPUF#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 LTC3769MPUF#TRPBF?
For technical support, including LTC3769MPUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3769MPUF#TRPBF requirements.
6.How does Aetrix verify that LTC3769MPUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3769MPUF#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 LTC3769MPUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3769MPUF#TRPBF?
All LTC3769MPUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3769MPUF#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 LTC3769MPUF#TRPBF part is unused and in its original packaging.
Return procedure for LTC3769MPUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3769MPUF#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…
