My Inquiry
My Account
Analog Devices Inc. LT3489EMS8E#TRPBF
- Part No.:
- LT3489EMS8E#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3489EMS8E#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 2.5A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3489EMS8E#TRPBF from Analog Devices (formerly Linear Technology) is a fixed-frequency, current-mode boost DC/DC converter IC with an integrated 2.5A, 40V NPN switch, 2MHz switching frequency, 1.235V feedback reference, and external soft-start control. It delivers up to 610mA at 8V from a 3.3V input and supports adjustable output from VIN to 40V - ideal for TFT-LCD bias supplies requiring compact, high-efficiency step-up conversion.
For engineers reviewing the LT3489EMS8E#TRPBF datasheet, LT3489EMS8E#TRPBF pinout, LT3489EMS8E#TRPBF application, or LT3489EMS8E#TRPBF equivalent, key selection considerations include its 2.5A internal switch VCE(SAT) of 110mV at 1A, internal/external loop compensation flexibility, MS8E package thermal performance (θJA = 40°C/W), and guaranteed operation from –40°C to 85°C.
Technical Context
The LT3489EMS8E#TRPBF employs constant-frequency current-mode control with peak-current limiting (2.5A nominal) and a 2MHz oscillator, enabling fast transient response and stable regulation across wide input (2.6V–16V) and output (VIN to 40V) ranges. Its error amplifier features 100 μmhos transconductance and 80 V/V voltage gain, supporting both internal (VC–COMP short) and external (RC–CC network) compensation.
Soft-start is implemented via a 10μA current source charging an external capacitor on the SS pin, directly modulating VC ramp rate and limiting inrush current. The device integrates shutdown (SHDN threshold: 0.3V to 2V), low-quiescent-current operation (2–4mA active, <1μA shutdown), and robust protection including thermal shutdown and absolute maximum ratings compliant with industrial-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.6V to 16V - supports single-cell Li-ion, dual-cell alkaline, and 3.3V/5V system rails without pre-regulation. |
| Switch Rating | 2.5A, 40V NPN with 110mV VCE(SAT) at 1A - enables high-efficiency power delivery with minimal conduction loss. |
| Feedback Voltage | 1.235V (±1.2% over temp) - sets precise output regulation via external resistor divider (VOUT = 1.235 × (1 + R1/R2)). |
| Switching Frequency | 2MHz (±10%) - allows use of sub-3mm height inductors (e.g., 2.2µH) and low-ESR ceramic capacitors for ultra-compact layouts. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive display applications with no derating required. |
| Quiescent Current | 2–4mA (active), <1μA (shutdown) - minimizes standby power in battery-powered GPS receivers and DSL modems. |
| Package | 8-lead MS8E (MSOP-8 exposed pad) - 3mm × 3mm footprint with θJC = 10°C/W for direct PCB thermal coupling. |
Pinout & Package
LT3489EMS8E#TRPBF uses the 8-lead MS8E (MSOP-8 with exposed thermal pad) package. The exposed pad (Pin 9) is GND and must be soldered to the PCB ground plane for thermal and electrical integrity. Pin pitch is 0.65mm; body dimensions are 3.00mm × 3.00mm × 1.10mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VC (Pin 1) | Error amplifier output | Connects to external RC–CC compensation network or shorts to COMP for internal compensation; controls peak switch current. |
| FB (Pin 2) | Feedback input | Senses output voltage divider; 1.235V reference enables accurate output setting; bias current ≤250nA minimizes divider error. |
| SHDN (Pin 3) | Shutdown control | Active-high enable: drives >2V to operate, <0.3V to shut down; leakage <2μA in shutdown preserves battery life. |
| GND (Pin 4) | Power ground | Primary return path for switch current and analog circuitry; must tie directly to low-impedance ground plane. |
| SW (Pin 5) | Switch collector | Drives external inductor/diode; 40V rating supports 23V outputs; minimize trace area to reduce EMI. |
| VIN (Pin 6) | Input supply | Accepts 2.6V–16V; requires local 4.7µF ceramic bypass close to pin to suppress high-frequency noise. |
| COMP (Pin 7) | Internal compensation node | Short to VC for internal compensation; tie to GND if unused; enables flexible loop tuning for ceramic-capacitor stability. |
| SS (Pin 8) | Soft-start control | 10μA current source charges external capacitor; 100nF yields ~18ms start time; prevents inrush into large output caps. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5A, 40V NPN switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity for space-constrained LCD bias rails. |
| 2MHz fixed-frequency operation | Enables use of 2.2µH–4.7µH low-profile inductors and 4.7µF–20µF X5R/X7R ceramics - solution height <1.1mm. |
| External soft-start control | Adjustable startup slew rate via SS pin capacitor prevents input voltage droop and output overshoot during power-on. |
| Internal/external loop compensation | Supports both simplified design (VC–COMP short) and optimized transient response (RC–CC network) with low-ESR ceramics. |
| Low 110mV VCE(SAT) at 1A | Reduces conduction loss by >30% vs. typical 200mV switches, improving efficiency at 610mA AVDD loads (e.g., 8V @ 3.3V input). |
Applications
| TFT-LCD Panel Bias Supply | GPS Receiver Power Management |
|---|---|
|
Use Scenario: Generating +8V (AVDD), –8V (VOFF), and +23V (VON) from a 3.3V rail for active-matrix TFT-LCD gate/source drivers. IC Role / Device Role / Timing Role: Primary boost controller managing three regulated outputs via diode-capacitor charge-pump stages; timing synchronized to 2MHz clock. Use Value: Achieves 8V@610mA, –8V@20mA, and 23V@10mA simultaneously with <1.1mm profile - meets slim-panel mechanical constraints. |
Use Scenario: Stepping up 3.3V system rail to 5V for GPS baseband ICs and RF front-end components in portable navigation devices. IC Role / Device Role / Timing Role: High-efficiency DC/DC converter operating in discontinuous conduction mode; 2MHz frequency avoids GPS L1 band (1.575GHz) interference. Use Value: Delivers >85% efficiency at 300mA load (VIN=3.3V), minimizing thermal impact in sealed handheld enclosures. |
| DSL Modem Local Power Rail | Industrial Local Power Supply |
|
Use Scenario: Providing isolated 12V/625mA output from 5V or 3.3V motherboard rail for line-driver amplifiers and PHY interfaces in ADSL/VDSL modems. IC Role / Device Role / Timing Role: Fixed-frequency boost regulator with external compensation (35.7kΩ/330pF) ensuring stable operation under dynamic line-load transients. Use Value: Maintains <1% output regulation across –40°C to 85°C ambient, meeting GR-905 telecom reliability requirements. |
Use Scenario: Generating 24V auxiliary supply from 12V industrial bus for sensors, actuators, and isolated communication interfaces (RS-485, CAN). IC Role / Device Role / Timing Role: Robust step-up controller with 16V absolute max VIN and 40V switch - tolerates 24V bus transients per ISO 7637-2. Use Value: Operates reliably at full 2.5A switch current with junction temperature limited to 125°C using MS8E exposed-pad thermal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3467EMS8E#TRPBF | 1.1A switch, 1.3MHz/2.7MHz selectable frequency, 40V max output, 2.6V–16V VIN | Lower current capability; better suited for <500mA loads where size and light-load efficiency are prioritized over peak power. | Select LT3467EMS8E#TRPBF when output current ≤500mA and programmable frequency aids EMI filtering. |
| LT1935EDD#TRPBF | 2A switch, 1.2MHz/2.7MHz, 38V max output, 2.3V–16V VIN, DFN-8 package | Lower switch current (2A vs. 2.5A); DFN offers lower θJA but lacks MSOP pin compatibility and exposed-pad GND routing simplicity. | Choose LT1935EDD#TRPBF for thermally demanding 2A applications where DFN layout and 2.7MHz option are acceptable. |
Compared with LT3467EMS8E#TRPBF and LT1935EDD#TRPBF, the LT3489EMS8E#TRPBF provides the highest switch current (2.5A) in an MSOP-8 package with guaranteed 2MHz operation - making it optimal for high-current TFT-LCD bias where consistent frequency simplifies EMI filter design and thermal management relies on exposed-pad soldering.
Availability
LT3489EMS8E#TRPBF is available at Aetrix Electronics and suitable for TFT-LCD bias supplies, GPS receiver power rails, DSL modem local regulators, industrial 24V generation, and portable medical display systems requiring stable component supply across extended temperature ranges.
Supply support for LT3489EMS8E#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 precision analog and power management portfolio. Linear pioneered high-performance DC/DC converters with integrated power switches and advanced control architectures.
The LT3489EMS8E#TRPBF belongs to Linear's high-frequency boost converter product line, designed specifically for compact, high-efficiency bias supplies in flat-panel displays and portable RF systems where board area and thermal profile are critical constraints.
FAQ
What is the maximum output voltage supported by the LT3489EMS8E#TRPBF?
The LT3489EMS8E#TRPBF supports adjustable output voltages from VIN up to 40V. This is enabled by its 40V-rated internal NPN switch and feedback architecture referenced to 1.235V. In practice, the LT3489EMS8E#TRPBF achieves 23V at 10mA (VON) and 8V at 610mA (AVDD) in triple-output TFT-LCD configurations, with output stability maintained across –40°C to 85°C.
Does the LT3489EMS8E#TRPBF require external compensation components?
The LT3489EMS8E#TRPBF supports both internal and external loop compensation. Internal compensation is enabled by shorting VC (Pin 1) to COMP (Pin 7); external compensation uses a series RC network from COMP to GND (e.g., 35.7kΩ and 330pF). The LT3489EMS8E#TRPBF datasheet confirms stable operation with low-ESR ceramic output capacitors in either configuration.
What is the purpose of the SS (soft-start) pin on the LT3489EMS8E#TRPBF?
The SS pin on the LT3489EMS8E#TRPBF sources a 10μA current to charge an external capacitor, controlling the ramp rate of the VC pin voltage and thus limiting inrush current during startup. A 100nF capacitor yields ~18ms soft-start time. Leaving SS floating disables soft-start, while grounding it forces immediate enable - the LT3489EMS8E#TRPBF requires this pin to be actively managed for reliable power sequencing.
Can the LT3489EMS8E#TRPBF operate from a 2.6V input supply?
Yes, the LT3489EMS8E#TRPBF has a minimum operating voltage of 2.6V (typical 2.4V), verified across –40°C to 85°C. At 2.6V input, it can deliver regulated outputs up to 40V with reduced maximum duty cycle (≤85%). The LT3489EMS8E#TRPBF maintains stable 2MHz switching and 1.235V feedback accuracy even at this lower VIN, making it suitable for single-cell LiFePO₄ or deeply discharged Li-ion systems.
How is thermal performance managed in the LT3489EMS8E#TRPBF MS8E package?
The LT3489EMS8E#TRPBF MS8E package incorporates an exposed thermal pad (Pin 9) that must be soldered to the PCB ground plane. With θJA = 40°C/W and θJC = 10°C/W, this pad provides a low-resistance thermal path to dissipate heat from the 2.5A switch. The LT3489EMS8E#TRPBF datasheet specifies minimum copper area and via count (e.g., 4×0.3mm vias) under the pad to maintain TJ ≤125°C at full load in still air.
LT3489EMS8E#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.6V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 2.5A (Switch)
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP-EP
LT3489EMS8E#TRPBF FAQ
1.How can I place an order for LT3489EMS8E#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3489EMS8E#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 LT3489EMS8E#TRPBF reliable?
The price and inventory of LT3489EMS8E#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3489EMS8E#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3489EMS8E#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3489EMS8E#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3489EMS8E#TRPBF?
LT3489EMS8E#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3489EMS8E#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 LT3489EMS8E#TRPBF?
For technical support, including LT3489EMS8E#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3489EMS8E#TRPBF requirements.
6.How does Aetrix verify that LT3489EMS8E#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3489EMS8E#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 LT3489EMS8E#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3489EMS8E#TRPBF?
All LT3489EMS8E#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3489EMS8E#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 LT3489EMS8E#TRPBF part is unused and in its original packaging.
Return procedure for LT3489EMS8E#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3489EMS8E#TRPBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
