My Inquiry
My Account
Analog Devices Inc. LTC3787HGN#TRPBF
- Part No.:
- LTC3787HGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3787HGN#TRPBF.pdf
- Description:
- IC REG CTRLR BOOST 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,501
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3787HGN#TRPBF from Analog Devices (formerly Linear Technology) is a dual-phase 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/DCR current sensing in industrial and automotive power systems.
For engineers reviewing the LTC3787HGN#TRPBF datasheet, LTC3787HGN#TRPBF pinout, LTC3787HGN#TRPBF application, or LTC3787HGN#TRPBF equivalent, this page provides verified technical context, phase-locked frequency control (75–850 kHz), 28-pin SSOP package details, and validated alternatives for high-efficiency boost converter design.
Technical Context
The LTC3787HGN#TRPBF implements constant-frequency current-mode control with two independent channels operating 180° out-of-phase. Its error amplifier compares VFB against a 1.200V reference, modulating ITH voltage to regulate peak inductor current per channel based on load demand.
It integrates a phase-locked loop for external clock synchronization, programmable oscillator (50–900 kHz), and three light-load modes-Burst Mode®, pulse-skipping, and forced continuous-selected via PLLIN/MODE pin voltage. Internal 5.4V LDO powers gate drivers from VBIAS or EXTVCC, with thermal protection and 100% duty cycle capability.
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 and bus voltage compatibility. |
| Output Voltage Range | Up to 60V - supports high-voltage industrial and automotive loads like LED strings or auxiliary rails. |
| Reference Voltage | ±1% 1.200V - ensures tight output regulation across temperature and line/load variations. |
| Quiescent Current | 135μA in pulse-skipping/forced continuous mode - minimizes standby power loss in always-on systems. |
| Switching Frequency | Programmable 50kHz–900kHz or syncable 75kHz–850kHz - allows EMI optimization and inductor size reduction. |
| Current Sensing | RSENSE or inductor DCR - eliminates sense resistor losses or enables low-cost, high-efficiency sensing. |
| Shutdown Current | <8μA - critical for ultra-low-power wake-up circuits and battery-backed applications. |
Pinout & Package
Package: 28-Lead Plastic SSOP (GN), –40°C to +150°C operating junction temperature, θJA = 90°C/W.
| 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; used with shunt or DCR sensing. |
| SENSE1–, SENSE2– | Negative current sense comparator input | Differential input pair with ±0.3V max offset; matched within ±12mV for phase current balance. |
| TG1, TG2 | Top gate driver output | Drives synchronous N-MOSFET gates; 1.2Ω pull-up/pull-down; 20ns rise/fall time into 3300pF. |
| BG1, BG2 | Bottom gate driver output | Drives main N-MOSFET gates; supports 96% max duty cycle; 70ns dead-time control between top/bottom switches. |
| VFB | Error amplifier feedback input | Compares output divider voltage against 1.200V reference; ±5nA input bias enables high-resistance dividers. |
| ITH | Error amplifier output / current limit threshold | Directly sets peak inductor current per phase; voltage range 0.425V–2V determines current trip point. |
| PLLIN/MODE | External sync input / light-load mode select | Pulls to GND for Burst Mode®, to INTVCC for forced continuous, or to mid-rail for pulse-skipping. |
| PGOOD | Open-drain power-good indicator | Asserts low when VOUT deviates >±10% from regulation; 25μs delay prevents false triggering during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 2-Phase PolyPhase® operation | Reduces RMS input/output ripple current by ~70% vs single-phase, enabling smaller capacitors and lower ESR requirements. |
| Synchronous rectification | Eliminates body-diode conduction losses; increases efficiency >90% at full load and reduces thermal stress on MOSFETs. |
| 100% duty cycle capability | Enables boost operation at VIN ≈ VOUT (e.g., 12V→12.5V), critical for hold-up and transient ride-through applications. |
| Thermally enhanced SSOP package | Rated for 150°C junction temperature; supports high-reliability automotive and industrial environments without derating. |
| Three selectable light-load modes | Burst Mode® (135μA IQ), pulse-skipping, or forced continuous - optimizes efficiency across 0.1mA–10A load range. |
Applications
| Automotive Infotainment Power Supply | Industrial 24V-to-48V DC-DC Boost Converter |
|---|---|
|
Use Scenario: Powering 48V camera modules and radar sensors from 12V vehicle battery with strict EMI limits. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller managing interleaved switching to suppress conducted emissions. Use Value: 2-phase operation cuts input capacitor RMS current by 70%, reducing bulk capacitance and PCB footprint while meeting CISPR-25 Class 5. |
Use Scenario: Generating stable 48V rail for PoE++ switches and industrial Ethernet equipment from 24V factory bus. IC Role / Device Role / Timing Role: High-efficiency polyphase controller delivering up to 10A at 48V with precise output regulation. Use Value: ±1% 1.200V reference and load regulation <±0.1% ensure compliance with IEEE 802.3bt voltage tolerance over full temperature range. |
| Medical Imaging System Auxiliary Rail | Military Vehicle Power Management |
|
Use Scenario: Providing clean, low-noise 36V supply for CCD/CMOS sensor biasing in portable ultrasound devices. IC Role / Device Role / Timing Role: Low-quiescent-current boost controller with soft-start and PGOOD monitoring for safety-critical sequencing. Use Value: 135μA quiescent current and 8μA shutdown current extend battery life; SS pin enables controlled 100ms ramp to prevent sensor latch-up. |
Use Scenario: Converting 28V aircraft bus to 60V for avionics test equipment requiring MIL-STD-704F compliance. IC Role / Device Role / Timing Role: Wide-input, high-temp-rated boost controller supporting cold-crank (2.5V) and surge (40V abs) conditions. Use Value: Operates down to 2.5V after startup and withstands 40V absolute max input - meets transient immunity requirements of military platforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8337EDD#TRPBF | Single-phase, 60V output, 3.5A integrated switch; no phase-locking or multi-phase support. | Lower power (≤30W), space-constrained designs where interleaving is unnecessary. | Select when board area is limited and ≤30W output suffices; avoids external MOSFET layout complexity. |
| MP9942GQ-P | Single-phase, 40V output, 2A integrated switch; fixed 500kHz frequency; no DCR sensing or PGOOD. | Cost-sensitive consumer-grade boost applications with moderate efficiency requirements. | Choose for BOM cost reduction in non-critical 12V→24V/36V conversions where thermal margin is ample. |
Compared with LT8337EDD#TRPBF and MP9942GQ-P, the LTC3787HGN#TRPBF uniquely delivers dual-phase interleaving, 60V output capability, and robust 150°C operation - making it the only option for high-power, high-reliability, thermally constrained boost systems requiring ripple cancellation and extended temperature support.
Availability
LTC3787HGN#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial 24V-to-48V converters, medical imaging auxiliary rails, and military vehicle power management requiring stable component supply and long-term lifecycle assurance.
Supply support for LTC3787HGN#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 acquired Linear Technology in 2017 and maintains its high-performance analog and power management portfolio with rigorous automotive and industrial qualification standards.
The LTC3787HGN#TRPBF belongs to the PolyPhase® synchronous controller product line, designed specifically for high-efficiency, low-noise, multi-phase DC-DC boost conversion in demanding environments including under-hood automotive and ruggedized industrial equipment.
FAQ
What is the maximum output voltage supported by the LTC3787HGN#TRPBF?
The LTC3787HGN#TRPBF supports an output voltage up to 60V. This is achieved through external MOSFET selection and proper gate drive design using BOOST1/BOOST2 pins. The controller itself does not regulate beyond this limit, and system-level voltage ratings must account for MOSFET breakdown voltage, snubber margins, and transient overshoot. The LTC3787HGN#TRPBF's internal circuitry remains functional and protected within its specified 40V absolute maximum ratings on all relevant pins.
Does the LTC3787HGN#TRPBF support DCR current sensing, and how is it configured?
Yes, the LTC3787HGN#TRPBF supports both RSENSE and inductor DCR current sensing. For DCR sensing, the SENSE+ and SENSE– pins connect across an RC network placed in series with the inductor; the RC time constant matches the inductor's L/R ratio to generate a voltage proportional to current. The LTC3787HGN#TRPBF's current comparator accepts the resulting differential signal with 2.5V–38V common-mode range and ±0.3V differential limit. No additional op-amp compensation is required for basic implementation.
What are the key differences between the LTC3787HGN#TRPBF and the standard LTC3787EGN#TRPBF?
The LTC3787HGN#TRPBF is rated for –40°C to +150°C operating junction temperature, while the LTC3787EGN#TRPBF is specified for 0°C to +85°C. Both share identical pinout, electrical specifications, and functionality. The H-grade variant undergoes extended characterization and screening to guarantee performance across the wider temperature range, making it suitable for under-hood automotive and high-ambient industrial applications where thermal derating is unacceptable. The LTC3787HGN#TRPBF uses the same 28-lead SSOP package and marking "3787".
How does the PLLIN/MODE pin configure light-load operation on the LTC3787HGN#TRPBF?
The PLLIN/MODE pin selects light-load behavior: grounding it enables Burst Mode® (135μA IQ), tying it to INTVCC forces continuous conduction, and applying 1.2V–(INTVCC–1.3V) enables pulse-skipping. An internal 100kΩ pull-down ensures Burst Mode® if left floating. Each mode affects efficiency, output ripple, and EMI profile - Burst Mode® maximizes light-load efficiency but increases ripple, while forced continuous offers lowest noise at the cost of higher quiescent loss. The LTC3787HGN#TRPBF's behavior is identical across temperature grades.
Can the LTC3787HGN#TRPBF be synchronized to an external clock, and what is the valid frequency range?
Yes, the LTC3787HGN#TRPBF supports external synchronization via the PLLIN/MODE pin. When driven with a clean CMOS/TTL clock, the internal PLL locks the rising edge of BG1 to the external clock's rising edge. Valid synchronization frequency is 75kHz to 850kHz. The LTC3787HGN#TRPBF maintains phase accuracy and jitter performance across its full operating temperature range, and synchronization remains stable even during input transients or load steps that would disrupt free-running oscillation.
LTC3787HGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC3787HGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3787HGN#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 LTC3787HGN#TRPBF reliable?
The price and inventory of LTC3787HGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3787HGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3787HGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3787HGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3787HGN#TRPBF?
LTC3787HGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3787HGN#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 LTC3787HGN#TRPBF?
For technical support, including LTC3787HGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3787HGN#TRPBF requirements.
6.How does Aetrix verify that LTC3787HGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3787HGN#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 LTC3787HGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3787HGN#TRPBF?
All LTC3787HGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3787HGN#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 LTC3787HGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC3787HGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3787HGN#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…
