My Inquiry
My Account
Analog Devices Inc. LTC3787HGN#PBF
- Part No.:
- LTC3787HGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3787HGN#PBF.pdf
- Description:
- IC REG CTRLR BOOST 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,015
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3787HGN#PBF from Analog Devices (formerly Linear Technology) is a high-performance PolyPhase® synchronous boost controller driving two N-channel MOSFET stages out-of-phase to reduce input/output capacitance and power supply noise. It operates from 4.5V–38V input (down to 2.5V post-startup), delivers up to 60V output, features ±1% 1.200V reference, and supports RSENSE or DCR current sensing in industrial and automotive power systems.
For engineers reviewing the LTC3787HGN#PBF datasheet, LTC3787HGN#PBF pinout, LTC3787HGN#PBF application, or LTC3787HGN#PBF equivalent, key selection criteria include its 2-phase operation capability, programmable 50kHz–900kHz switching frequency, 135μA quiescent current in pulse-skipping mode, thermal robustness to +150°C junction, and compatibility with both SSOP and QFN packages for layout flexibility.
Technical Context
The LTC3787HGN#PBF implements constant-frequency current-mode control with dual 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 phase. The internal 5.4V LDO powers gate drivers from either VBIAS or EXTVCC, with automatic switchover at 4.8V.
Phase-lockable PLL synchronization (75kHz–850kHz) enables multi-controller daisy-chaining via CLKOUT, while PHASMD pin configures inter-channel phase alignment. Current sensing supports three selectable thresholds (42mV/68mV/90mV) via ILIM pin states, and reverse-current protection prevents inductor current reversal during light-load Burst Mode operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V (abs max 40V); operates down to 2.5V after startup - enables wide battery chemistries and transient resilience in automotive systems. |
| Output Voltage Range | Up to 60V - supports high-voltage LED strings, industrial sensors, and auxiliary rail generation. |
| Reference Voltage Accuracy | ±1% at 1.200V - ensures tight output regulation across temperature and load for precision power rails. |
| Quiescent Current | 135μA in pulse-skipping mode - minimizes standby power loss in always-on automotive modules. |
| Switching Frequency Range | 50kHz to 900kHz (programmable) or 75kHz to 850kHz (PLL-sync) - balances efficiency, EMI, and magnetics size in space-constrained designs. |
| Operating Junction Temp | –40°C to +150°C - qualified for under-hood automotive and harsh industrial environments. |
| Current Sense Thresholds | Selectable 42mV/68mV/90mV via ILIM pin - allows optimization of sense resistor power loss vs. noise immunity. |
Pinout & Package
Package: 28-Lead Plastic SSOP (GN), thermally enhanced for +150°C operation; exposed pad not present (unlike QFN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1+/SENSE2+ | Positive current sense comparator input | Accepts common-mode voltage up to 38V; supplies bias to current comparator; connects to high-side of sense resistor. |
| SENSE1–/SENSE2– | Negative current sense comparator input | Connects to low-side of sense resistor; differential range limited to ±0.3V for accurate current measurement. |
| TG1/TG2 | Top gate driver output | Drives gate of synchronous N-MOSFET; 1.2Ω pull-up/pull-down resistance enables fast 20ns edge transitions. |
| 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 output voltage (via external divider) to 1.200V reference; ±5nA input current minimizes divider error. |
| ITH | Error amplifier output / current limit threshold | Directly sets peak inductor current per phase; voltage range 0.425V–2V determines current limit and loop stability. |
| PLLIN/MODE | External sync input / light-load mode selector | Accepts external clock (75–850kHz) for synchronization; selects Burst Mode (GND), pulse-skipping (1.2–INTVCC−1.3V), or forced continuous (INTVCC). |
| PGOOD | Open-drain power-good indicator | Asserts low when VOUT deviates >±10% from regulation; 25μs delay prevents false trips during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 2-Phase PolyPhase operation | Reduces RMS input/output capacitor ripple current by ~70%, enabling smaller, lower-cost bulk capacitors and easing EMI filtering. |
| Synchronous rectification | Eliminates body-diode conduction losses, increasing efficiency >3% at 10A output and reducing thermal stress on MOSFETs. |
| 100% duty cycle capability | Enables seamless transition to dropout conditions (e.g., VIN ≈ VOUT), maintaining regulation without discontinuous operation artifacts. |
| Low IQ sleep mode | 135μA quiescent current extends battery life in always-on applications such as telematics and ADAS sensor nodes. |
| Thermally robust SSOP package | Rated for 150°C junction temperature with θJA = 90°C/W - suitable for engine compartment mounting without derating. |
Applications
| Automotive ADAS Power Supply | Industrial High-Voltage Sensor Bias |
|---|---|
Use Scenario: Generating stable 24V/10A from 12V vehicle battery for radar modules and camera ISPs, surviving cold-crank transients down to 2.5V. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller regulating output voltage while minimizing input ripple and EMI in safety-critical subsystems. Use Value: 2-phase operation cuts input capacitor requirements by 50%, reducing board area and cost; ±1% reference ensures consistent sensor performance across temperature. | Use Scenario: Providing isolated 48V bias for industrial photomultiplier tubes and MEMS pressure sensors requiring low-noise, high-stability excitation. IC Role / Device Role / Timing Role: Precision boost controller delivering regulated high-voltage rail with minimal load regulation drift (<0.1%) and low 135μA quiescent current. Use Value: Programmable 50–900kHz frequency allows EMI tuning to avoid sensitive sensor bands; DCR sensing eliminates sense resistor power loss in compact enclosures. |
| Medical Portable Imaging DC-DC | Military Vehicle Auxiliary Rail |
Use Scenario: Converting 12V battery to 60V for portable X-ray detector bias supplies, operating continuously in field-deployed equipment with strict thermal limits. IC Role / Device Role / Timing Role: High-efficiency PolyPhase boost controller managing thermal dissipation via synchronous switching and 150°C-rated SSOP package. Use Value: 100% duty cycle support maintains regulation during brownouts; low shutdown current (<8μA) preserves battery charge during standby. | Use Scenario: Generating ruggedized 28V auxiliary power from 24V vehicle bus for mission-critical comms and navigation electronics in armored vehicles. IC Role / Device Role / Timing Role: MIL-qualified boost controller with extended temperature range (–40°C to +150°C) and robust overvoltage protection (40V abs max on all pins). Use Value: Phase-lockable PLL enables synchronization with vehicle master clock to suppress beat frequencies; EXTVCC option reduces thermal load on main regulator. |
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; exposed pad requires GND connection. | Better thermal performance for high-power density layouts; unsuitable where SSOP footprint or leaded assembly is required. | Select when PCB real estate is constrained and thermal management prioritizes low θJA over leaded reworkability. |
| LTC3787IGUFD#TRPBF | Industrial-grade QFN variant (–40°C to +125°C), identical electrical specs but lower temp rating than H-grade. | Cost-optimized for non-military/automotive applications where 150°C junction is unnecessary. | Choose for commercial/industrial systems with ambient <85°C and no under-hood deployment. |
Compared with LTC3787HGN#PBF, the QFN alternatives offer superior thermal resistance but require different PCB land patterns and reflow profiles; the H-grade SSOP remains the only through-hole-compatible, 150°C-rated option for legacy or high-reliability mechanical mounting.
Availability
LTC3787HGN#PBF is available at Aetrix Electronics and suitable for automotive ADAS power supplies, industrial high-voltage sensor bias, medical portable imaging DC-DC, and military vehicle auxiliary rail applications requiring stable component supply and extended temperature qualification.
Supply support for LTC3787HGN#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 product support, documentation, and manufacturing continuity for all Linear ICs including the LTC3787 family.
The LTC3787 product line was designed specifically for high-efficiency, multiphase synchronous boost conversion in demanding environments-emphasizing thermal resilience, wide input range, and precise output regulation for automotive, industrial, and medical systems.
FAQ
What is the maximum operating junction temperature for the LTC3787HGN#PBF?
The LTC3787HGN#PBF is rated for a maximum operating junction temperature of +150°C, validated across its full specification range. This H-grade qualification makes it suitable for under-hood automotive applications and other high-ambient environments where standard industrial-grade controllers would require derating. Thermal design must account for θJA = 90°C/W in the SSOP package.
Does the LTC3787HGN#PBF support both RSENSE and inductor DCR current sensing?
Yes, the LTC3787HGN#PBF supports both RSENSE and inductor DCR current sensing methods. The SENSE+ and SENSE– pins accept the differential voltage across either a discrete sense resistor or the parasitic resistance of the inductor winding. DCR sensing eliminates power loss from a dedicated resistor, while RSENSE offers higher accuracy and noise immunity - selection depends on system trade-offs between efficiency, cost, and precision.
How does the ILIM pin configure current sense thresholds on the LTC3787HGN#PBF?
The ILIM pin on the LTC3787HGN#PBF selects one of three peak current sense thresholds: tying ILIM to GND sets 42mV, leaving it floating selects 68mV, and connecting it to INTVCC chooses 90mV. These thresholds directly determine the voltage across the sense element at current limit, allowing designers to optimize between sense resistor power dissipation (lower threshold) and signal-to-noise ratio (higher threshold) for their specific inductor or MOSFET layout.
Can the LTC3787HGN#PBF operate with an input voltage below 4.5V?
Yes, the LTC3787HGN#PBF can operate with input voltage as low as 2.5V after startup when biased from its own output (VBIAS = VOUT) or an auxiliary supply. However, the minimum start-up voltage remains 4.5V - meaning the device requires ≥4.5V on VBIAS to initiate switching, after which it sustains regulation down to 2.5V during transients. This behavior is critical for cold-crank survival in automotive applications.
What are the key differences between the LTC3787HGN#PBF and LTC3787HUFD#PBF?
The LTC3787HGN#PBF and LTC3787HUFD#PBF share identical electrical specifications and H-grade temperature rating (–40°C to +150°C), but differ in package: GN is 28-lead SSOP with gull-wing leads, while UFD is 28-lead 4mm × 5mm QFN with exposed thermal pad. The SSOP offers easier visual inspection and rework; the QFN provides lower thermal resistance (θJA = 43°C/W vs. 90°C/W) and higher power density. Footprints and soldering processes are not interchangeable.
LTC3787HGN#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:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
LTC3787HGN#PBF FAQ
1.How can I place an order for LTC3787HGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3787HGN#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 LTC3787HGN#PBF reliable?
The price and inventory of LTC3787HGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3787HGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC3787HGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3787HGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3787HGN#PBF?
LTC3787HGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3787HGN#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 LTC3787HGN#PBF?
For technical support, including LTC3787HGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3787HGN#PBF requirements.
6.How does Aetrix verify that LTC3787HGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3787HGN#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 LTC3787HGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC3787HGN#PBF?
All LTC3787HGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3787HGN#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 LTC3787HGN#PBF part is unused and in its original packaging.
Return procedure for LTC3787HGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3787HGN#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…
