My Inquiry
My Account
Analog Devices Inc. LTC3769MPFE#PBF
- Part No.:
- LTC3769MPFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3769MPFE#PBF.pdf
- Description:
- IC REG CTRLR BOOST/SEPIC 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,946
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3769MPFE#PBF from Analog Devices (formerly Linear Technology) is a high-performance, 60V-input synchronous boost controller driving all-N-channel MOSFET stages for industrial and automotive power conversion. It delivers ±1% reference accuracy, 28µA quiescent current, 4.5V–60V input range (operable down to 2.3V post-startup), and supports up to 60V output in ruggedized TSSOP-20 packaging rated for –55°C to +150°C.
For engineers reviewing the LTC3769MPFE#PBF datasheet, LTC3769MPFE#PBF pinout, LTC3769MPFE#PBF application, or LTC3769MPFE#PBF equivalent, key selection considerations include its wide VIN range, programmable 50kHz–900kHz switching frequency, RSENSE/DCR current sensing, 100% duty cycle capability, and thermally enhanced TSSOP package with exposed pad grounding.
Technical Context
The LTC3769MPFE#PBF implements constant-frequency current-mode control with an internal 1.200V ±1% reference and transconductance error amplifier. Its dual-gate drivers support synchronous rectification with independent top (TG) and bottom (BG) gate outputs, enabling high-efficiency boost conversion without external driver ICs.
It integrates phase-lockable PLL synchronization (75kHz–850kHz), selectable light-load modes (Burst Mode®, pulse-skipping, forced continuous), and overvoltage protection via OVMODE pin configuration. Power sequencing is managed through RUN pin hysteresis (1.18V–1.38V threshold) and soft-start ramping via SS pin with 10µA internal current source.
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-supply compatibility. |
| Output Voltage Range | Up to 60V - supports high-voltage industrial sensors, LED strings, and auxiliary rails. |
| Reference Voltage Accuracy | ±1% at 1.200V - ensures tight output regulation across temperature and load. |
| Quiescent Current | 28µA in no-load operation - extends runtime in always-on battery systems. |
| Switching Frequency Range | 50kHz to 900kHz (programmable) or 75kHz to 850kHz (PLL-synchronized) - balances efficiency, size, and EMI. |
| Current Sensing | RSENSE or inductor DCR - eliminates need for dedicated sense resistors in cost-sensitive designs. |
| Shutdown Current | 4µA - minimizes leakage during system sleep states. |
Pinout & Package
Package: 20-Lead Plastic TSSOP with exposed thermal pad (Pin 21), rated for –55°C to +150°C operating junction temperature. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance (θJA = 38°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBIAS (Pin 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. |
| PGOOD (Pin 2) | Open-drain power-good indicator | Pulls low when VFB deviates >±10% from 1.2V for ≥45µs - enables system-level fault detection and sequencing. |
| 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 thermal ground | Multiple GND pins plus exposed pad (Pin 21) require low-impedance PCB connection - critical for noise immunity and thermal dissipation. |
| INTVCC (Pins 2, 17) | Internal 5.4V LDO output | Powers gate drivers and control circuitry; requires ≥4.7µF ceramic bypass capacitor - decoupling prevents instability and shoot-through. |
| FREQ (Pin 3) | Oscillator frequency control | Resistor-to-GND or DC voltage sets 50kHz–900kHz; GND/INTVCC forces 350kHz/535kHz - enables EMI tuning and layout optimization. |
| PLLIN/MODE (Pin 5) | Sync input / light-load mode select | External clock sync or Burst Mode®/pulse-skipping/forced continuous selection - adapts efficiency behavior to load profile. |
| RUN (Pin 6) | Enable/shutdown control | 1.18V–1.38V rising threshold with 100mV hysteresis; 4.5µA sourced current enables resistor-divider hysteresis - supports reliable brown-in/brown-out control. |
| SS (Pin 7) | Soft-start ramp control | 10µA internal current charges external capacitor - linearly ramps VOUT from 0V to final value, preventing inrush and overshoot. |
| SENSE– (Pin 8) | Negative current sense input | Connects to low-side of sense resistor or inductor DCR - common-mode range 2.3V–60V enables high-side sensing in buck-boost topologies. |
| SENSE+ (Pin 9) | Positive current sense input | Supplies current comparator bias; same CM range as SENSE– - supports accurate current measurement across full VIN range. |
| VFB (Pin 10) | Feedback voltage input | Compares remote-sensed output voltage against 1.200V reference - enables precision regulation with external resistor divider. |
| ITH (Pin 11) | Error amplifier output / current limit threshold | Voltage sets peak inductor current; also used for loop compensation - unifies regulation and protection functions. |
| OVMODE (Pin 12) | Overvoltage mode select | GND enables OV shutdown (TG forced on); INTVCC disables OV action - configurable safety response for mission-critical systems. |
| SW (Pin 13) | Switch node | Connects to source of synchronous FET and drain of main FET - high dv/dt node requiring short, low-inductance routing. |
| TG (Pin 14) | Top gate driver output | Drives gate of synchronous N-MOSFET; integrated charge pump enables high-side drive - eliminates need for external bootstrap components. |
| BOOST (Pin 15) | Floating supply for TG driver | Bypassed to SW with ceramic capacitor; powered via Schottky from INTVCC - sustains gate drive during 100% duty cycle. |
| BG (Pin 16) | Bottom gate driver output | Drives gate of main N-MOSFET; complementary to TG - enables synchronous rectification with minimal conduction loss. |
| EXTVCC (Pin 18) | External bias input for INTVCC LDO | Enables switchover to external 4.5V–14V supply - reduces VBIAS LDO power dissipation in high-current applications. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous N-MOSFET control | Eliminates external driver ICs and discrete diodes - reduces BOM count and improves efficiency by >5% vs. asynchronous designs. |
| 100% duty cycle capability | Enables VOUT ≈ VIN operation - supports seamless transition in battery-powered systems during low-input conditions. |
| Programmable light-load modes | Burst Mode® (28µA IQ), pulse-skipping, or forced continuous - optimizes efficiency across 0.1mA–5A load range without sacrificing transient response. |
| Robust overvoltage protection | Configurable OV response (latch-off or continue operation) via OVMODE pin - meets functional safety requirements in automotive and medical systems. |
| Thermally enhanced TSSOP-20 | Exposed pad and optimized copper layout achieve θJA = 38°C/W - enables 120W operation without heatsink in industrial ambient (70°C). |
Applications
| Industrial Motor Drives | Automotive ADAS Power Rails |
|---|---|
Use Scenario: Boosting 12V vehicle battery to 24V/48V for radar modules and camera ISPs under cold-crank conditions (VIN dips to 6V). IC Role / Device Role / Timing Role: Primary synchronous boost controller managing input transients, regulating stable 24V rail, and providing PGOOD signaling to SoC. Use Value: 2.3V start-up capability and –55°C to +150°C rating ensure reliable operation during engine cranking and under-hood thermal stress. | Use Scenario: Generating isolated 15V bias for automotive-grade isolated gate drivers in 48V mild-hybrid inverters. IC Role / Device Role / Timing Role: High-efficiency boost stage preceding isolated DC/DC converter; synchronized to system clock via PLLIN/MODE. Use Value: Phase-lockable frequency (75kHz–850kHz) enables EMI reduction through spread-spectrum alignment with other subsystem clocks. |
| Medical Portable Imaging | Military Rugged Communications |
Use Scenario: Powering X-ray detector bias supplies (±30V) from Li-ion battery packs (8.4V–12.6V) in handheld ultrasound units. IC Role / Device Role / Timing Role: Precision-controlled boost controller with RSENSE/DCR sensing and ±1% VREF - maintains stable high-voltage rails for analog front-end ADCs. Use Value: Low 28µA quiescent current extends battery life between scans; 100% duty cycle allows direct pass-through during battery depletion. | Use Scenario: Providing 28V/5A regulated output from 24V military vehicle bus (18V–32V) for encrypted radio transceivers in extreme environments. IC Role / Device Role / Timing Role: MIL-qualified boost controller with extended temperature range and robust UVLO/PGOOD monitoring. Use Value: –55°C to +150°C operation and 65V absolute max ratings ensure reliability in desert heat and arctic cold without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3769HFE#PBF | Same architecture and pinout; rated for –40°C to +150°C (vs. –55°C to +150°C) | Lacks extended low-temperature qualification; suitable for non-military industrial use | Select when full military-grade cold-start capability is not required and cost optimization is prioritized. |
| LT8337EMSE#PBF | Integrated 1.5A switch; lower VIN (3V) and VOUT (40V) limits; no PLL sync or DCR sensing | Targeted at space-constrained, medium-power applications without stringent thermal or synchronization needs | Choose for simplified design with fewer external components where 120W output and 60V capability are unnecessary. |
Compared with LTC3769HFE#PBF, the LTC3769MPFE#PBF adds guaranteed operation down to –55°C for cold-environment deployment; versus LT8337EMSE#PBF, it offers higher voltage capability, external MOSFET flexibility, and advanced synchronization - making it optimal for high-reliability, high-power boost systems.
Availability
LTC3769MPFE#PBF is available at Aetrix Electronics and suitable for industrial motor drives, automotive ADAS power rails, and military communications equipment requiring stable component supply across extreme temperature ranges and long production lifecycles.
Supply support for LTC3769MPFE#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 and maintains its legacy of high-performance analog and power management ICs with rigorous automotive, industrial, and military qualification standards.
The LTC3769 product line was designed specifically for high-efficiency, high-voltage synchronous boost conversion in harsh environments - emphasizing ultra-low quiescent current, wide input range, and robust thermal performance in compact packages.
FAQ
What is the minimum input voltage for LTC3769MPFE#PBF after startup?
The LTC3769MPFE#PBF operates down to 2.3V after startup when VBIAS is powered from the output rail (VOUT) or an auxiliary supply. This enables continued regulation during deep battery discharge or cold-crank events where input voltage collapses below nominal levels. The 4.5V–60V primary input range remains valid for normal operation.
Does LTC3769MPFE#PBF support inductor DCR current sensing?
Yes, the LTC3769MPFE#PBF supports both RSENSE and inductor DCR current sensing. Its SENSE+ and SENSE– inputs feature a 2.3V–60V common-mode range and internal biasing, allowing direct connection to DCR taps without external amplifiers. This reduces component count and improves thermal efficiency in high-current designs.
How does the EXTVCC pin function on LTC3769MPFE#PBF?
The EXTVCC pin on LTC3769MPFE#PBF provides an alternative input to the internal 5.4V LDO that powers INTVCC. When EXTVCC exceeds 4.8V, the VBIAS LDO shuts off and the EXTVCC LDO activates - reducing power dissipation and thermal stress when an efficient external bias source (e.g., pre-regulated 5V or 8.5V rail) is available.
What are the light-load operation modes supported by LTC3769MPFE#PBF?
The LTC3769MPFE#PBF supports three configurable light-load modes via the PLLIN/MODE pin: Burst Mode® (28µA IQ, highest efficiency at microamp loads), pulse-skipping (moderate efficiency with better transient response), and forced continuous conduction (lowest noise, fixed frequency). Each mode is selected by pulling PLLIN/MODE to GND, INTVCC, or an intermediate voltage.
Is LTC3769MPFE#PBF pin-compatible with other LTC3769 variants?
Yes, LTC3769MPFE#PBF is pin-compatible with all other LTC3769EFE#, LTC3769IFE#, and LTC3769HFE# variants in the TSSOP-20 package. Differences are limited to temperature grade (-55°C to +150°C for MP grade) and screening - no PCB layout changes are required when upgrading from commercial or industrial grades.
LTC3769MPFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
LTC3769MPFE#PBF FAQ
1.How can I place an order for LTC3769MPFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3769MPFE#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 LTC3769MPFE#PBF reliable?
The price and inventory of LTC3769MPFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3769MPFE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3769MPFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3769MPFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3769MPFE#PBF?
LTC3769MPFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3769MPFE#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 LTC3769MPFE#PBF?
For technical support, including LTC3769MPFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3769MPFE#PBF requirements.
6.How does Aetrix verify that LTC3769MPFE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3769MPFE#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 LTC3769MPFE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3769MPFE#PBF?
All LTC3769MPFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3769MPFE#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 LTC3769MPFE#PBF part is unused and in its original packaging.
Return procedure for LTC3769MPFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3769MPFE#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…
