LTC3859ALMPFE#TRPBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LTC3859ALMPFE#TRPBF is a triple-output synchronous buck/buck/boost controller with 28 µA Burst Mode quiescent current, supporting input voltages from 4.5 V to 38 V and output voltages from 0.8 V to 24 V in an SSOP-38 package. Current-mode PWM control with spread-spectrum frequency dithering delivers tight load regulation and low EMI for multi-rail power systems. Available in stock with worldwide shipping from authorized distributors.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 38
- Lifecycle
- ACTIVE
- Datasheet
- LTC3859ALMPFE#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $18.5600(MOQ 1)
- Temp Range
- -55.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Triple-output buck/buck/boost architecture generates 3 independent regulated rails from a single 4.5 V–38 V input, covering 0.8 V to 24 V output range
- Ultra-low 28 µA Burst Mode IQ extends battery life in always-on power systems while maintaining output voltage regulation during light-load standby states
- Current-mode PWM control with spread-spectrum frequency dithering minimizes conducted and radiated EMI—critical for sensitive RF and analog signal chain supplies
Applications
The LTC3859ALMPFE#TRPBF is used in multi-rail power supply designs for telecommunications equipment, industrial computers, and battery-powered instruments requiring three independently regulated output voltages from a single wide-input-range bus. Its 28 µA Burst Mode operation extends standby battery life in always-on IoT gateways and portable data loggers. The boost output rail also makes it suitable for powering legacy 12 V or 24 V loads from a 5 V or lower system bus in space-constrained board designs.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1772 |
| YTEOL | 10 |
| Additional Feature | OUTPUT VOLTAGE RANGE FROM 0.8 VOLT TO 24 VOLT |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 38V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G38 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 24V |
| Output Voltage-Min | 0.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 900kHz |
| Technology | CMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LTC3859ALMPFE#TRPBF support and what output voltages can it generate simultaneously?
The LTC3859ALMPFE#TRPBF operates from an input voltage range of 4.5 V to 38 V and can simultaneously generate up to 3 independent output rails covering 0.8 V to 24 V. The two buck channels step the input voltage down while the boost channel steps it up, enabling a single IC to supply a low-voltage core rail such as 1.0 V, an I/O rail at 3.3 V, and a legacy 12 V load all from a 5 V or 12 V bus.
How low is the LTC3859ALMPFE#TRPBF quiescent current in Burst Mode and why does this matter for battery-powered designs?
In Burst Mode operation, the LTC3859ALMPFE#TRPBF draws only 28 µA quiescent current from the input supply while maintaining all three regulated output voltages. For a battery-powered device with a 1000 mAh cell, this translates to over 35,000 hours of standby life from the controller alone—enabling always-on IoT sensor nodes and portable instruments to meet multi-year battery lifetime targets without deep power rail shutdowns.
For a telecom board with tight EMI requirements, how does the LTC3859ALMPFE#TRPBF reduce switching noise?
The LTC3859ALMPFE#TRPBF implements spread-spectrum frequency dithering, which disperses the switching noise energy across a frequency band rather than concentrating it at a fixed switching frequency. This technique typically reduces peak conducted EMI by 10 dB to 15 dB at the fundamental switching frequency, simplifying EMI filter design and reducing the number of input capacitors needed to meet CISPR 22 or FCC Class B radiated emission limits in telecom and industrial power supply designs.
Related Guides
1206 100 uF MLCC Design Guide for Compact Bulk Decoupling
Design guidance for applying CL31A107MQHNNNE and related 1206 MLCCs in compact bulk decoupling networks.
Jul 3, 2026
0402 10 nF MLCC Design Guide for High-Speed Decoupling
Practical design guidance for using CL05B103KB5NNNC and related 0402 MLCCs in high-speed decoupling networks.
Jul 3, 2026
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
Why Buy from FindMyChip
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.
More from Analog Devices
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $26.4800 | $26.48 |
| 19+ | $24.6000 | $467.40 |
| 1000+ | $18.5600 | $18560.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”