My Inquiry
My Account
Analog Devices Inc. LTC3897EFE#TRPBF
- Part No.:
- LTC3897EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LTC3897EFE#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK BOOST 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,635
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3897EFE#TRPBF from Analog Devices is a dual-phase synchronous boost DC/DC controller with integrated surge stopper and ideal diode controller. It operates from 4.5V to 65V input (with 75V transient tolerance), delivers up to 60V output, supports 2-phase interleaved operation to reduce ripple and capacitor size, and provides reverse input protection down to –40V - used in high-reliability 24V/10A industrial power supplies requiring robust overvoltage, inrush, and reverse-polarity protection.
For engineers reviewing the LTC3897EFE#TRPBF datasheet, LTC3897EFE#TRPBF pinout, LTC3897EFE#TRPBF application, or LTC3897EFE#TRPBF equivalent, key selection criteria include its dual-phase synchronous boost architecture, programmable gate drive (5–10V OPTI-DRIVE), 55µA Burst Mode quiescent current, integrated surge stopper with adjustable clamp, and ideal diode control for holdup and reverse protection - all in a thermally enhanced 38-lead TSSOP package.
Technical Context
The LTC3897EFE#TRPBF implements a two-phase interleaved synchronous boost topology with out-of-phase gate drive to minimize input/output ripple and EMI. Its surge stopper uses an external N-channel MOSFET controlled via SG pin, with programmable overvoltage threshold (via SPFB) and overcurrent detection (via IS+/IS−), enabling precise input transient clamping and fault recovery.
The integrated ideal diode controller drives a second external N-channel MOSFET via DG pin, regulating forward voltage drop (20–40mV) and blocking reverse current. The error amplifier (1.200V ±12mV VFB), programmable oscillator (320–585kHz), and OPTI-DRIVE (5–10V DRVCC) support wide FET selection and stable regulation across 4.5–65V input and up to 60V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 65V continuous; withstands 75V transients - enables direct connection to 24V/48V industrial or automotive battery rails without pre-regulation. |
| Output Voltage Range | Up to 60V regulated - supports high-voltage auxiliary rails for sensors, actuators, or RF modules. |
| Quiescent Current | 55µA in Burst Mode - extends battery life in always-on systems with intermittent load demand. |
| Boost Controller Phases | 2-phase interleaved - reduces input/output capacitor requirements by ~50% and cuts peak-to-peak ripple current vs single-phase. |
| Surge Stopper Clamp | Adjustable via SPFB feedback (1.235V typical) - sets precise input overvoltage trip point independent of temperature or supply variation. |
| Ideal Diode Regulation | 20–40mV forward voltage drop (ΔVSD) - replaces Schottky diodes with <1% conduction loss at high currents. |
| Gate Drive Voltage | Programmable 5V–10V (OPTI-DRIVE via DRVSET) - supports both logic-level and standard-threshold N-MOSFETs without external level shifters. |
Pinout & Package
The LTC3897EFE#TRPBF is housed in a 38-lead plastic TSSOP package (FE grade) with exposed pad (Pin 39) soldered to PCB ground for thermal management (θJA = 28°C/W). Pin functions are fully defined per Analog Devices Rev. A datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply rail | Accepts 4.5V–75V; powers internal bias circuits and enables operation through transients. |
| SG | Surge stopper gate driver output | Drives external N-MOSFET source to clamp input surges; supports overcurrent, overvoltage, and output disconnect. |
| DG | Ideal diode gate driver output | Controls external N-MOSFET for reverse polarity protection and holdup; regulates VCS–VIS+ to 20–40mV. |
| TG1/TG2 | Top gate drivers for synchronous boost | Drive gate of high-side N-MOSFETs; support 5–10V OPTI-DRIVE for optimal RDS(on) utilization. |
| BG1/BG2 | Bottom gate drivers for synchronous boost | Drive gate of low-side N-MOSFETs; feature programmable dead time (60–275ns) via DTC pin. |
| SENSE1+/SENSE1− SENSE2+/SENSE2− | Current sense inputs (dual channel) | Monitor inductor current per phase; support three gain settings (48/95/140mV) via ILIM pin. |
| VFB | Feedback reference input | 1.200V ±12mV precision reference; used with external resistor divider to regulate output voltage. |
| DRVCC | Gate driver supply output | Internally regulated LDO output (5–10V); powers TG/BG drivers and requires ≥4.7µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| 2-phase interleaved boost control | Reduces input/output RMS current by ~30%, enabling smaller magnetics and lower EMI without sacrificing power density. |
| Integrated surge stopper | Replaces discrete overvoltage protection ICs; provides adjustable clamp, inrush limiting, and automatic retry after fault clearance. |
| Onboard ideal diode controller | Eliminates Schottky losses and thermal derating; supports reverse input protection to –40V and seamless holdup during input dips. |
| OPTI-DRIVE gate voltage programming | Configures DRVCC from 5V to 10V using single resistor on DRVSET - ensures full enhancement of diverse N-MOSFETs. |
| Low-quiescent-current Burst Mode | 55µA operating current at no load - maintains regulation while minimizing standby power in battery-backed systems. |
Applications
| Industrial Power Supply | Automotive Infotainment |
|---|---|
Use Scenario: 24V input rail powering 48V camera modules and radar sensors in factory automation equipment. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller with surge stopper and ideal diode, regulating 48V output from fluctuating 24V bus with transient immunity. Use Value: Withstands 75V load-dump transients and blocks –40V reverse battery connection - eliminates need for external TVS and series diodes. | Use Scenario: Powering display backlight and audio amplifiers from vehicle battery with cold-crank and jump-start resilience. IC Role / Device Role / Timing Role: High-input-voltage boost controller managing 12V-to-24V conversion while protecting against reverse polarity and battery reversal. Use Value: Ideal diode function prevents backfeed during engine cranking; surge stopper clamps 60V jump-start spikes without shutdown. |
| Military Avionics | Railway Signaling |
Use Scenario: Generating stable 28V auxiliary rail from 270V DC aircraft distribution bus with strict MIL-STD-704F compliance. IC Role / Device Role / Timing Role: Two-phase boost controller with programmable frequency and phase synchronization (via PLLIN/MODE) for multi-rail coordination. Use Value: Interleaving reduces conducted EMI below Class B limits; 150°C H-grade variants available for extended thermal environments. | Use Scenario: Converting 72V nominal traction battery to 24V control logic supply in train door control units exposed to regenerative braking surges. IC Role / Device Role / Timing Role: Surge-tolerant boost controller with adjustable overvoltage trip (SPFB) and auto-retry timer (TMR) for fail-safe operation. Use Value: TMR pin enables configurable fault recovery timing - avoids latching shutdown during brief 100V+ regen events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3897IUHF#TRPBF | Same functionality and pinout; QFN package (UHF) with θJA = 34°C/W vs TSSOP's 28°C/W; rated for –40°C to 125°C junction. | Preferred for space-constrained layouts requiring lower profile; thermal performance differs due to package geometry and exposed pad mounting. | Select when board area is limited and thermal interface to PCB is optimized for QFN; verify layout cooling meets θJA derating. |
| LTC3897HFE#TRPBF | Identical TSSOP package and pinout; extended temperature rating (–40°C to 150°C junction) with tighter VFB tolerance (±1.0% vs ±1.2%). | Suitable for under-hood automotive or avionics where ambient exceeds 125°C; same footprint enables drop-in upgrade. | Choose for high-temperature deployments requiring guaranteed operation at 150°C junction; no PCB change needed. |
Compared with LTC3897IUHF#TRPBF and LTC3897HFE#TRPBF, the LTC3897EFE#TRPBF offers the standard industrial temperature range (–40°C to 125°C) in the thermally superior TSSOP package - delivering best-in-class junction-to-ambient thermal resistance (28°C/W) for high-power density designs without QFN assembly complexity.
Availability
LTC3897EFE#TRPBF is available at Aetrix Electronics and suitable for industrial power supplies, automotive infotainment systems, and railway signaling equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC3897EFE#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and aerospace markets.
The LTC3897 product line is designed for high-reliability DC/DC conversion in harsh environments - integrating boost control, surge protection, and ideal diode functionality into a single controller to simplify high-voltage power system design.
FAQ
What is the maximum input voltage the LTC3897EFE#TRPBF can handle continuously and during transients?
The LTC3897EFE#TRPBF operates continuously from 4.5V to 65V input and is rated to withstand input transients up to 75V without damage or malfunction. This capability is verified per Absolute Maximum Ratings (VIN ≤ 76V) and supported by internal clamping structures on the VIN, SG, and DG pins - making it suitable for 24V/48V industrial and automotive battery systems subject to load dump or jump-start conditions.
How does the LTC3897EFE#TRPBF implement reverse input protection?
The LTC3897EFE#TRPBF implements reverse input protection via its integrated ideal diode controller, which drives an external N-channel MOSFET using the DG pin. When input polarity reverses, the controller actively turns off the MOSFET and blocks current flow down to –40V. Simultaneously, ΔVSD regulation (20–40mV) ensures minimal forward conduction loss during normal operation - replacing bulky Schottky diodes with near-zero forward voltage penalty.
Can the LTC3897EFE#TRPBF be synchronized to an external clock, and how is this configured?
Yes, the LTC3897EFE#TRPBF supports external clock synchronization via the PLLIN/MODE pin. When configured as a clock input (by pulling PHASMD appropriately), it locks its internal oscillator to an external 75–850kHz clock signal, enabling precise phase alignment across multiple converters in multiphase or stacked configurations. This eliminates beat frequencies and reduces system-level EMI - critical in dense power architectures like server VRMs or multi-rail avionics supplies.
What is the purpose of the DTC pin on the LTC3897EFE#TRPBF, and what dead time values does it support?
The DTC (Dead Time Control) pin on the LTC3897EFE#TRPBF selects the non-overlap interval between top-gate (TG) and bottom-gate (BG) drive signals to prevent shoot-through in synchronous boost stages. It supports three settings: grounded (60ns), floating (100ns), or tied to INTVCC (200ns). This programmability allows optimization for different MOSFET gate charge characteristics and switching speeds - ensuring robust operation across a wide range of FET selections without external timing components.
Does the LTC3897EFE#TRPBF require external bootstrap diodes for high-side gate drive?
No, the LTC3897EFE#TRPBF does not require external bootstrap diodes. Its integrated charge pump circuitry on BOOST1 and BOOST2 pins autonomously generates the floating gate drive voltage needed for the high-side N-channel MOSFETs (TG1/TG2). This eliminates discrete bootstrap components, reduces BOM count, and improves reliability - especially in high-duty-cycle or high-frequency applications where bootstrap capacitor recharge may otherwise be marginal.
LTC3897EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width) Exposed Pad
- 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 ~ 65V
- Frequency - Switching:
- 75kHz ~ 850kHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Frequency Control, Overcurrent, Ramping
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP-EP
LTC3897EFE#TRPBF FAQ
1.How can I place an order for LTC3897EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3897EFE#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 LTC3897EFE#TRPBF reliable?
The price and inventory of LTC3897EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3897EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3897EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3897EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3897EFE#TRPBF?
LTC3897EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3897EFE#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 LTC3897EFE#TRPBF?
For technical support, including LTC3897EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3897EFE#TRPBF requirements.
6.How does Aetrix verify that LTC3897EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3897EFE#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 LTC3897EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3897EFE#TRPBF?
All LTC3897EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3897EFE#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 LTC3897EFE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3897EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3897EFE#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…
