LT1339ISW#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
LT1339ISW#PBF is a high-power synchronous DC/DC controller IC from Analog Devices supporting current-mode PWM control with 10 V to 15 V input voltage range. It drives external N-channel MOSFETs for synchronous buck conversion, enabling high-efficiency power delivery for demanding loads. Housed in a 20-pin SOIC package, it is suited for telecom, industrial, and server power supply designs.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- LT1339ISW#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $9.9400(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT1339ISW#PBF?
- Current-mode PWM control for inherently stable loop dynamics and cycle-by-cycle current limiting
- Synchronous N-channel MOSFET drive for high-efficiency DC-DC buck conversion at 10 V to 15 V input
- 20-pin SOIC package with integrated gate drivers enabling compact high-power converter layouts
- High-power design support with precise duty cycle control for low-ripple output regulation
What is LT1339ISW#PBF used for?
LT1339ISW#PBF is designed for high-power synchronous buck converters in telecom infrastructure, server motherboards, and industrial power supplies operating from a 12 V bus. Its current-mode PWM architecture enables reliable current sharing and fast transient response, making it ideal for point-of-load converters supplying FPGAs, ASICs, and DSP processors. The synchronous MOSFET drive capability also makes it an excellent choice for high-efficiency bidirectional power stages in battery management and energy storage systems.
What are the specifications of LT1339ISW#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1620 (SW20) |
| YTEOL | 9 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 15V |
| Input Voltage-Min | 10V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Nom | 1.25V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 20mA |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 150kHz |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## LT1339ISW#PBF Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LT1339ISW#PBF datasheet?
LT1339ISW#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT1339ISW#PBF?
Compatible alternatives and drop-in replacements for LT1339ISW#PBF:
Frequently Asked Questions
What input voltage range does LT1339ISW#PBF support and what topology does it control?
LT1339ISW#PBF operates from a 10 V to 15 V input range, with a nominal 12 V bus as the primary target, and implements current-mode PWM control for synchronous buck DC-DC conversion. This makes it well-suited for 12 V telecom and server power rails requiring high-efficiency step-down conversion with precise cycle-by-cycle current limiting and fast load transient response.
How does LT1339ISW#PBF's current-mode control benefit high-power server and telecom power supplies?
Current-mode control in LT1339ISW#PBF provides inherent cycle-by-cycle peak current limiting, simpler loop compensation, and excellent line transient rejection compared to voltage-mode controllers. These advantages are critical in high-power 12 V bus applications such as server motherboards or telecom rectifiers where load steps can be hundreds of milliamps and output voltage deviations must be held within tens of millivolts.
Which external MOSFETs pair well with LT1339ISW#PBF for a synchronous buck converter at 12 V input?
LT1339ISW#PBF drives external N-channel MOSFETs for both high-side and low-side switches, so devices with 20 V or 30 V Vds ratings and low gate charge such as the Si7336ADP or similar 10 mΩ to 30 mΩ Rds(on) devices pair well. Selecting MOSFETs with Vgs threshold below 2.5 V and total gate charge under 50 nC ensures efficient switching at the controller's operating frequency in a 12 V, high-current synchronous buck design.
For a 12 V to 1.8 V point-of-load converter powering an FPGA core, what makes LT1339ISW#PBF a strong candidate?
LT1339ISW#PBF's current-mode PWM architecture and synchronous rectification support deliver the high efficiency and fast transient response needed for 1.8 V FPGA core rails with dynamic load currents. Operating from a standard 12 V bus with external N-channel MOSFETs, it can be configured to supply tens of amperes at a tightly regulated 1.8 V output, housed in a compact 20-pin SOIC package that fits into dense PCB layouts.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $19.1100 | $19.11 |
| 10+ | $13.5250 | $135.25 |
| 19+ | $13.1700 | $250.23 |
| 500+ | $11.7700 | $5885.00 |
| 1000+ | $9.9400 | $9940.00 |
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