LT3489EMS8E Linear Technology Integrated Circuit (Small Outline Packages) In Stock
The Linear Technology LT3489EMS8E is a 2 MHz current-mode boost DC/DC converter with a 2.5 A internal switch and adjustable soft-start. It accepts a 2.6 V to 16 V input and is housed in a compact 8-pin MSOP surface-mount package. Available from stock worldwide with fast shipping.
- Manufacturer
- Linear Technology
- Package
- Small Outline Packages
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- LT3489EMS8E Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2 MHz switching frequency reduces external inductor and capacitor size for compact boost converter PCB layouts
- 2.5 A internal switch with current-mode PWM control delivers fast transient response and cycle-by-cycle current limiting
- Adjustable soft-start limits inrush current at power-up, protecting batteries and USB ports in portable designs
Applications
The LT3489EMS8E is ideal for battery-powered portable equipment, handheld instruments, and LED driver circuits requiring a regulated boosted output from a 2.6 V to 16 V supply. Its 2 MHz switching frequency minimizes external passive component size, making it well suited for space-constrained designs. The adjustable soft-start function also makes it a strong fit for USB-powered and current-limited input source applications.
Specifications
| YTEOL | 8.5 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 2.6V |
| Input Voltage-Nom | 3V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 5A |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 2200kHz |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LT3489EMS8E's 2 MHz switching frequency reduce the size of external passive components?
At 2 MHz the LT3489EMS8E requires far smaller inductors and output capacitors than converters running at 300 kHz to 600 kHz, since required inductance and capacitance scale inversely with frequency. This results in a compact PCB footprint ideal for handheld and wearable devices powered from 2.6 V to 16 V supply rails.
What inrush current risk does the LT3489EMS8E's soft-start feature address in battery-powered systems?
Without soft-start, a boost converter can draw large inrush currents at power-up that sag the input voltage or trip upstream protection. The LT3489EMS8E's adjustable soft-start ramps the output voltage gradually over a programmable period, keeping input current below the 2.5 A switch limit and preventing voltage droops on sensitive battery or USB 500 mA-limited supply rails.
For a 3.3 V to 12 V boost stage in an industrial sensor, how does the LT3489EMS8E's 2.5 A switch current translate to usable output current?
With a 2.5 A peak switch current, the LT3489EMS8E can deliver approximately 300 mA to 500 mA at 12 V from a 3.3 V input, depending on inductor DCR and duty cycle. The current-mode PWM architecture provides cycle-by-cycle protection, and the 8-pin MSOP package handles typical switch power dissipation within its thermal rating for industrial sensor supply designs.
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