My Inquiry
My Account
Analog Devices Inc. LTC3769HUF#PBF
- Part No.:
- LTC3769HUF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC3769HUF#PBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,962
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3769HUF#PBF from Analog Devices (formerly Linear Technology) is a high-performance synchronous boost controller driving dual N-channel MOSFETs in high-efficiency 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-ideal for industrial 12V-to-24V/5A power rails requiring thermal resilience.
For engineers reviewing the LTC3769HUF#PBF datasheet, LTC3769HUF#PBF pinout, LTC3769HUF#PBF application, or LTC3769HUF#PBF equivalent, key selection criteria include its –40°C to 150°C junction-rated QFN package, programmable 50kHz–900kHz switching frequency, RSENSE/DCR current sensing flexibility, 100% duty cycle capability, and phase-lockable PLLIN interface for system-level clock synchronization.
Technical Context
The LTC3769HUF#PBF implements constant-frequency current-mode control with an internal error amplifier (2 mmho transconductance), precision 1.200V ±1% reference, and independent ITH-based peak current regulation. Its architecture supports three light-load modes-Burst Mode® (28μA IQ), pulse-skipping, and forced continuous-selected via the PLLIN/MODE pin.
It integrates dual gate drivers (TG/BG) with 20ns rise/fall times, 1.2Ω pull-up/pull-down resistance, and 30ns dead-time control. The INTVCC LDO (5.4V ±2%) can be powered from VBIAS (4.5V–60V) or EXTVCC (4.5V–14V), enabling efficient biasing from output or auxiliary rails-critical for low-input-voltage post-startup operation down to 2.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V; operates down to 2.3V after startup when biased from VOUT-enables wide battery and industrial supply compatibility. |
| Output Voltage Range | Up to 60V regulated; set via external resistor divider on VFB-supports high-side boost for LED drivers and industrial sensors. |
| Reference Voltage Accuracy | ±1% at 1.200V over –40°C to 150°C-ensures stable output regulation across extended temperature extremes. |
| Quiescent Current | 28μA in no-load pulse-skipping mode-extends runtime in battery-powered systems like portable medical monitors. |
| Switching Frequency Range | 50kHz to 900kHz (programmable); 75kHz to 850kHz (PLL-synchronized)-allows EMI optimization and inductor size reduction. |
| Current Sense Threshold | Selectable 42mV/68mV/90mV via ILIM pin-enables precise overcurrent protection with RSENSE or DCR sensing. |
| Thermal Rating | Junction temperature range –40°C to 150°C (H-grade); θJA = 47°C/W in 4mm × 4mm QFN-validated for under-hood automotive and harsh-environment use. |
Pinout & Package
Thermally enhanced 24-pin 4mm × 4mm plastic QFN package with exposed pad (Pin 25) soldered to PCB ground for optimal thermal dissipation (θJA = 47°C/W). Pin count and layout match LTC3769EUF/IUF/MPUF variants; H-grade qualification confirms full operation at TJ = 150°C.
| 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; 45μs delay prevents false trips during transients. |
| ILIM (Pin 3) | Peak current sense threshold select | GND/float/INTVCC sets 50mV/75mV/100mV trip point-configures overcurrent protection without external components. |
| INTVCC (Pins 5, 22) | Internal 5.4V LDO output | Supplies gate drivers and control logic; bypassed with ≥4.7μF ceramic capacitor to GND for stability. |
| FREQ (Pin 7) | Oscillator frequency programming | Resistor-to-GND sets 50kHz–900kHz; voltage input or sync signal enables precise EMI control. |
| GND (Pins 8, 10, 24, Exposed Pad 25) | Signal and power ground | All pins must connect to common ground plane; exposed pad soldering mandatory for thermal and electrical performance. |
| PLLIN/MODE (Pin 9) | External clock sync & light-load mode select | Enables PLL synchronization (75kHz–850kHz) or selects Burst Mode®/pulse-skipping/forced continuous operation. |
| RUN (Pin 11) | Enable/shutdown control | 1.28V threshold enables operation; <0.7V reduces IQ to 4μA-supports system-level power sequencing. |
| SS (Pin 12) | Soft-start ramp control | 10μA internal current charges external capacitor-linearly ramps VOUT to prevent inrush current stress. |
| SENSE– / SENSE+ (Pins 13, 14) | Differential current sense inputs | Support 2.3V–60V common-mode range; enable accurate RSENSE or DCR sensing for lossless current monitoring. |
| VFB (Pin 15) | Feedback voltage input | Compares output divider voltage to 1.200V reference-determines regulation accuracy and loop stability. |
| ITH (Pin 16) | Error amplifier output & current limit threshold | Voltage sets peak inductor current; also serves as compensation node for loop tuning. |
| OVMODE (Pin 17) | Overvoltage protection mode select | GND enables OV shutdown (TG forced on); INTVCC disables OV action-configurable safety response. |
| SW (Pin 18) | Switch node connection | Connects to source of synchronous FET and drain of main FET-critical high-dV/dt node requiring tight layout. |
| TG (Pin 19) | Top gate driver output | Drives gate of synchronous N-MOSFET; 20ns rise/fall time supports high-frequency, low-loss switching. |
| BOOST (Pin 20) | Floating supply for TG driver | Bypassed to SW with capacitor; charged via Schottky from INTVCC-enables high-side N-FET drive. |
| BG (Pin 21) | Bottom gate driver output | Drives gate of main N-MOSFET; matched timing with TG ensures robust dead-time control. |
| EXTVCC (Pin 23) | External bias input for INTVCC LDO | Activates alternate LDO when >4.8V applied-reduces VBIAS dissipation and improves efficiency at high VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous N-MOSFET control | Eliminates external diode losses, enabling >95% efficiency in 12V-to-24V/5A applications and reducing thermal design burden. |
| 100% duty cycle capability | Allows VOUT ≈ VIN during dropout conditions-maintains regulation even when input sags near output voltage. |
| Three selectable light-load modes | Burst Mode® (28μA IQ), pulse-skipping, or forced continuous-optimizes efficiency across full load range without external circuitry. |
| Programmable current sense threshold | 42mV/68mV/90mV options via ILIM pin-enables precise overcurrent protection with minimal BOM cost and board space. |
| Phase-lockable oscillator | 75kHz–850kHz PLL sync via PLLIN/MODE-enables deterministic EMI reduction and multi-rail synchronization in complex systems. |
| H-grade temperature qualification | –40°C to 150°C guaranteed operation-validates reliability in automotive engine compartments and industrial motor drives. |
Applications
| Industrial Power Rails | Automotive ADAS Sensors |
|---|---|
|
Use Scenario: 12V vehicle battery powering 24V camera modules and radar processors in parking assist systems. IC Role / Device Role / Timing Role: Synchronous boost controller regulating stable 24V from variable 9V–16V battery input, with PGOOD signaling system readiness. Use Value: 28μA quiescent current extends sleep-mode battery life; H-grade rating ensures operation at 150°C under hood. |
Use Scenario: Boosting 5V USB-C PD rail to 12V for high-resolution automotive infotainment displays. IC Role / Device Role / Timing Role: High-efficiency step-up controller with programmable frequency to avoid AM band EMI interference. Use Value: 50kHz–900kHz adjustable switching enables EMI compliance; RSENSE/DCR flexibility simplifies current monitoring. |
| Portable Medical Monitors | LED Backlight Drivers |
|
Use Scenario: Battery-powered patient monitor requiring 20V for analog front-end amplifiers and ADC references. IC Role / Device Role / Timing Role: Low-IQ boost controller delivering regulated 20V from single-cell Li-ion (3.0V–4.2V) with soft-start ramp. Use Value: 2.3V minimum operating voltage after startup enables deep discharge utilization; SS pin enables controlled inrush limiting. |
Use Scenario: Driving high-brightness white LEDs in industrial signage requiring 48V string voltage from 12V supply. IC Role / Device Role / Timing Role: High-voltage synchronous boost controller with 60V output capability and OVMODE-configurable overvoltage response. Use Value: 60V absolute max output supports long LED strings; ±1% reference ensures consistent brightness across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8330EDD#PBF | Fixed 2MHz frequency, lower 3V–40V VIN range, integrated 1.5A switch (vs. external FETs), no PLL sync. | Targeted at compact, medium-power (<15W) designs where board space outweighs efficiency; lacks H-grade temp rating. | Choose LT8330EDD#PBF for space-constrained, lower-power applications needing integration-not for 60V output or 150°C environments. |
| TPS61088RHLR | 5.5V max VIN, 12.6V max VOUT, integrated 10A switch, no RSENSE/DCR option, only 2.5V–5.5V input support. | Designed for USB power banks and portable electronics-not suitable for industrial 60V input or high-temp operation. | Choose TPS61088RHLR only for low-voltage consumer applications; incompatible with LTC3769HUF#PBF's 60V input/output and H-grade requirements. |
Compared with LT8330EDD#PBF and TPS61088RHLR, the LTC3769HUF#PBF uniquely combines 60V input/output capability, –40°C to 150°C operation, external FET control for scalability, and PLL synchronization-making it the sole option for high-reliability, high-voltage industrial and automotive boost designs.
Availability
LTC3769HUF#PBF is available at Aetrix Electronics and suitable for industrial power rails, automotive ADAS sensors, and portable medical monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3769HUF#PBF 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) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving industrial, automotive, communications, and healthcare markets.
The LTC3769HUF#PBF belongs to Linear's high-voltage synchronous controller product line, engineered for rugged, high-efficiency DC/DC conversion in thermally demanding applications such as engine control units and factory automation systems.
FAQ
What is the maximum input voltage rating for the LTC3769HUF#PBF?
The LTC3769HUF#PBF has an absolute maximum input voltage rating of 65V on the VBIAS pin, with recommended continuous operation up to 60V. Its wide 4.5V–60V input range supports diverse battery chemistries and industrial bus voltages, and it can operate down to 2.3V after startup when biased from the output rail-enabling brownout resilience in critical systems.
How does the LTC3769HUF#PBF achieve 28μA quiescent current?
The LTC3769HUF#PBF achieves 28μA quiescent current in Burst Mode® operation by dynamically disabling gate drivers and major internal blocks during light-load intervals while maintaining regulation via output capacitor hold-up. This ultra-low IQ extends battery life in portable medical devices and always-on automotive modules without sacrificing start-up speed or transient response.
Can the LTC3769HUF#PBF synchronize to an external clock, and what is the supported frequency range?
Yes, the LTC3769HUF#PBF supports external clock synchronization via the PLLIN/MODE pin across a 75kHz–850kHz range. When an external clock is applied, the internal PLL locks the rising edge of the bottom gate (BG) to the external clock's rising edge-enabling deterministic EMI reduction and coordinated switching in multi-converter systems such as server PSUs or ADAS domain controllers.
What package type and thermal specifications apply to the LTC3769HUF#PBF?
The LTC3769HUF#PBF uses a 24-pin 4mm × 4mm plastic QFN package with exposed thermal pad (Pin 25). It is qualified for –40°C to 150°C junction temperature operation (H-grade), with θJA = 47°C/W. The exposed pad must be soldered to PCB ground for rated thermal performance-critical for sustained 120W operation in enclosed industrial enclosures.
Does the LTC3769HUF#PBF support both RSENSE and inductor DCR current sensing?
Yes, the LTC3769HUF#PBF supports both RSENSE and inductor DCR current sensing through its differential SENSE+ and SENSE– inputs, which feature a 2.3V–60V common-mode range and selectable 42mV/68mV/90mV thresholds via the ILIM pin. This dual-sensing capability eliminates the need for external amplifiers or complex compensation networks-reducing BOM cost and improving accuracy in high-current industrial boost converters.
LTC3769HUF#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC3769HUF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3769HUF#PBF 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#PBF reliable?
The price and inventory of LTC3769HUF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3769HUF#PBF is usually 5 days.
3.What payment methods are accepted for LTC3769HUF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3769HUF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3769HUF#PBF?
LTC3769HUF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3769HUF#PBF 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#PBF?
For technical support, including LTC3769HUF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3769HUF#PBF requirements.
6.How does Aetrix verify that LTC3769HUF#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3769HUF#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3769HUF#PBF?
All LTC3769HUF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3769HUF#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC3769HUF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3769HUF#PBF 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…
