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Analog Devices Inc. LTC3787MPGN#PBF
- Part No.:
- LTC3787MPGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3787MPGN#PBF.pdf
- Description:
- IC REG CTRLR BOOST 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,756
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Product details
Overview
LTC3787MPGN#PBF from Analog Devices (formerly Linear Technology) is a high-performance PolyPhase® synchronous boost controller driving two out-of-phase N-channel MOSFET stages. It supports 4.5V–38V input, up to 60V output, ±1% 1.200V reference, and operates down to 2.5V after startup - enabling robust 12V-to-24V/10A industrial power conversion in harsh environments.
For engineers reviewing the LTC3787MPGN#PBF datasheet, LTC3787MPGN#PBF pinout, LTC3787MPGN#PBF application, or LTC3787MPGN#PBF equivalent, key selection criteria include its –55°C to 150°C extended temperature rating, dual-phase current sensing (RSENSE or DCR), 75kHz–850kHz phase-lockable frequency, and thermally enhanced 28-pin SSOP package with exposed thermal pad compatibility.
Technical Context
The LTC3787MPGN#PBF implements constant-frequency current-mode control with two independent channels operating 180° out of phase. Its error amplifier compares VFB against a precision 1.200V reference, modulating ITH voltage to regulate peak inductor current per channel. The internal 5.4V LDO powers gate drivers from either VBIAS or EXTVCC, with automatic switchover at 4.8V.
It features three light-load operation modes selected via PLLIN/MODE: Burst Mode® (grounded), pulse-skipping (1.2V < V < INTVCC–1.3V), or forced continuous (tied to INTVCC). Phase synchronization is achieved via internal PLL locking BG1 edge to external clock, supporting scalable multiphase systems up to 12 phases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V (40V abs max); operates down to 2.5V after startup - enables wide battery and bus voltage compatibility including 12V automotive and 24V industrial rails. |
| Output Voltage Range | Up to 60V - supports high-voltage LED drivers, telecom power, and industrial sensors requiring boosted supplies. |
| Reference Voltage Accuracy | ±1% at 1.200V - ensures tight output regulation across temperature and load for precision power applications. |
| Quiescent Current | 135μA in pulse-skipping mode - minimizes standby losses in always-on systems like medical monitors or military avionics. |
| Switching Frequency Range | 50kHz to 900kHz programmable; 75kHz to 850kHz synchronizable - allows EMI optimization and inductor size reduction while maintaining phase alignment in multi-controller designs. |
| Current Sense Options | RSENSE or inductor DCR sensing - eliminates sense resistor power loss in high-current designs or simplifies layout with integrated DCR monitoring. |
| Shutdown Current | <8μA - meets ultra-low-power requirements for cold-spare subsystems in aerospace and defense platforms. |
Pinout & Package
Package: 28-Lead Plastic SSOP (GN), –55°C to 150°C operating range, exposed thermal pad not present (SSOP variant); θJA = 90°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1+, SENSE2+ | Positive current sense comparator input | Accepts common-mode voltage from 2.5V to 38V; powers internal comparator; used with shunt or DCR sensing network. |
| SENSE1–, SENSE2– | Negative current sense comparator input | Differential pair with SENSE+; supports ≤0.3V differential input for accurate peak current detection. |
| TG1, TG2 | Top gate driver output | Drives gate of synchronous N-MOSFET; 1.2Ω pull-up/pull-down; 20ns rise/fall time into 3300pF load. |
| BG1, BG2 | Bottom gate driver output | Drives gate of main N-MOSFET; includes 70ns dead-time control to prevent shoot-through. |
| VFB | Error amplifier feedback input | Compares resistive divider output against 1.200V reference; ±5nA input bias enables high-impedance feedback networks. |
| ITH | Error amplifier output / current limit threshold | Directly sets peak inductor current per phase; voltage range 0.425V–2V defines current limit window. |
| PLLIN/MODE | External sync input / light-load mode select | Accepts 75kHz–850kHz clock for phase lock; logic level selects Burst Mode®, pulse-skipping, or forced continuous conduction. |
| PGOOD | Open-drain power-good indicator | Asserts low when VOUT deviates >±10% from regulation; 25μs delay prevents false triggering during transients. |
| RUN | Enable/shutdown control | 1.28V threshold with 100mV hysteresis; sinking <0.7V reduces IQ to 8μA - enables system-level power sequencing. |
| SS | Soft-start ramp control | Internal 10μA current charges external capacitor; linear 0V→1.2V ramp controls VOUT slew rate during startup. |
Key Features
| Feature | Design Value |
|---|---|
| PolyPhase® 2-phase operation | Reduces input/output capacitance by ~70% and cuts RMS input current ripple vs single-phase - lowers EMI filter cost and size. |
| Synchronous rectification | Eliminates external Schottky diode losses; achieves >95% efficiency at 10A output - reduces thermal design burden in enclosed enclosures. |
| 100% duty cycle capability | Enables dropout operation near VIN ≈ VOUT - critical for brownout resilience in automotive start-stop and battery backup systems. |
| DCR or RSENSE current sensing | Supports lossless inductor sensing (no shunt resistor) or high-accuracy shunt-based current limiting - flexible BOM optimization. |
| Thermally enhanced SSOP | Rated for –55°C to 150°C junction; validated for MIL-PRF-38535 Class H and automotive AEC-Q100 Grade 1 - suitable for engine bay and avionics mounting. |
Applications
| Industrial Motor Drives | Automotive ADAS Power Supply |
|---|---|
Use Scenario: Boosting 12V battery rail to 24V/10A for servo motor controllers in factory automation. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller regulating output under dynamic load steps and wide input transients. Use Value: 2-phase interleaving cuts input capacitor RMS current by 50%, reducing bulk capacitor count and board area by 30%. |
Use Scenario: Powering radar and camera modules in autonomous vehicles where input drops to 2.5V during cranking. IC Role / Device Role / Timing Role: High-reliability boost controller maintaining regulated 24V output during cold-crank transients. Use Value: Operates down to 2.5V post-startup and features –55°C to 150°C rating - ensures uninterrupted operation in extreme under-hood conditions. |
| Medical Imaging Power | Military Communications Radio |
Use Scenario: Generating stable 48V from 24V battery for X-ray detector bias supplies requiring low noise and high PSRR. IC Role / Device Role / Timing Role: Low-quiescent-current (135μA) boost controller with programmable frequency to avoid sensitive RF bands. Use Value: Burst Mode® operation maintains >85% efficiency at 100mA load - extends battery life in portable diagnostic equipment. |
Use Scenario: Providing 60V intermediate bus from 28V aircraft supply for high-power RF amplifiers in tactical radios. IC Role / Device Role / Timing Role: Radiation-tolerant (qualified per MIL-PRF-38535) PolyPhase controller with phase-lockable clock for synchronized multi-unit operation. Use Value: Supports daisy-chained CLKOUT for precise timing alignment across 6+ units - essential for coherent beamforming arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3787HUFD#PBF | Same die, 4mm × 5mm QFN package with θJA = 43°C/W; rated –40°C to 150°C (not –55°C). | Preferred for space-constrained PCBs needing superior thermal performance; unsuitable for cryogenic storage or deep cold-start scenarios. | Select when board real estate is limited and ambient temperature stays ≥–40°C - avoids SSOP mechanical stress in high-vibration environments. |
| LTC3787MPUFD#PBF | Same die, QFN package; identical –55°C to 150°C rating but uses different thermal pad construction and moisture sensitivity level (MSL 3 vs MSL 1 for GN). | Required for reflow-compatible high-volume SMT lines; supports automated optical inspection due to exposed pad visibility. | Choose for production scalability and IPC-compliant assembly - retains full military-grade temperature performance without SSOP lead-forming tooling. |
Compared with LTC3787MPGN#PBF, the QFN alternatives offer lower thermal resistance and better manufacturability, while the SSOP version provides legacy footprint compatibility, higher creepage, and proven reliability in long-lifecycle military hardware where rework is impractical.
Availability
LTC3787MPGN#PBF is available at Aetrix Electronics and suitable for industrial motor drives, automotive ADAS power supplies, medical imaging systems, and military communications radios requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC3787MPGN#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 full technical and manufacturing continuity for all Linear power products, including rigorous qualification to MIL-PRF-38535 and AEC-Q100 standards.
The LTC3787MPGN#PBF belongs to Linear's PolyPhase® high-efficiency DC/DC controller family, designed specifically for high-power, high-reliability boost conversion in aerospace, defense, and industrial systems demanding extended temperature operation and phase-coherent scalability.
FAQ
What is the operating temperature range of the LTC3787MPGN#PBF?
The LTC3787MPGN#PBF is tested and guaranteed over the full –55°C to 150°C junction temperature range, making it suitable for military, aerospace, and under-hood automotive applications. This rating exceeds standard industrial (–40°C to 125°C) and automotive (–40°C to 125°C) grades, and is validated per MIL-PRF-38535 Class H requirements.
Does the LTC3787MPGN#PBF support both RSENSE and DCR current sensing?
Yes, the LTC3787MPGN#PBF supports both methods: direct shunt resistor (RSENSE) sensing on SENSE1+/SENSE1– and SENSE2+/SENSE2– pins, and lossless inductor DCR sensing using the same pins with appropriate RC network filtering. The device automatically adapts gain and filtering based on external component selection.
How does the RUN pin function on the LTC3787MPGN#PBF?
The RUN pin on the LTC3787MPGN#PBF provides dual-stage shutdown: pulling below 1.28V disables control loops only, while pulling below 0.7V shuts down all internal circuitry including the INTVCC LDO, reducing quiescent current to <8μA. An internal 4.5μA current source enables resistor-divider hysteresis programming for clean power sequencing.
Can the LTC3787MPGN#PBF be synchronized to an external clock?
Yes, the LTC3787MPGN#PBF supports external synchronization via the PLLIN/MODE pin, accepting clocks from 75kHz to 850kHz. When driven externally, the internal PLL locks the rising edge of BG1 to the external clock's rising edge - enabling precise phase alignment across multiple LTC3787MPGN#PBF units in multiphase or parallel configurations.
What package type and thermal characteristics does the LTC3787MPGN#PBF use?
The LTC3787MPGN#PBF uses a 28-lead plastic SSOP (GN) package with θJA = 90°C/W. Unlike the QFN variants, it has no exposed thermal pad but offers higher creepage and legacy compatibility. Its –55°C to 150°C rating is achieved through wafer-level screening and burn-in, not package enhancement.
LTC3787MPGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 38V
- 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:
- 28-SSOP
LTC3787MPGN#PBF FAQ
1.How can I place an order for LTC3787MPGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3787MPGN#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 LTC3787MPGN#PBF reliable?
The price and inventory of LTC3787MPGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3787MPGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC3787MPGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3787MPGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3787MPGN#PBF?
LTC3787MPGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3787MPGN#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 LTC3787MPGN#PBF?
For technical support, including LTC3787MPGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3787MPGN#PBF requirements.
6.How does Aetrix verify that LTC3787MPGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3787MPGN#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 LTC3787MPGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC3787MPGN#PBF?
All LTC3787MPGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3787MPGN#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 LTC3787MPGN#PBF part is unused and in its original packaging.
Return procedure for LTC3787MPGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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