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Analog Devices LTC3639 | Demoboard DC3017A-A
High Efficiency, 150V 100mA Synchronous Step-Down Regulator
Overview
| Topology | LAN / POE |
| Input voltage | 55 V |
| Output 1 | 57 V / 0.6 A |
| Output 2 | 57 V / 0.35 A |
| Output 3 | 57 V / 1.92 A |
| Output 4 | 57 V / 1.2 A |
| IC revision | 03 |
Description
The LTC®3639 is a high efficiency step-down DC/DC regulator with internal high side and synchronous power switches that draws only 12μA typical DC supply current while maintaining a regulated output voltage at no load. The LTC3639 can supply up to 100mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency and for reducing output ripple and component size. The LTC3639’s combination of Burst Mode® operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents. With its wide input range of 4V to 150V and programmable overvoltage lockout, the LTC3639 is a robust regulator suited for regulating from a wide variety of power sources. Additionally, the LTC3639 includes a precise run threshold and soft-start feature to guarantee that the power system start-up is well-controlled in any environment. The LTC3639 is available in a thermally enhanced high voltage-capable 16-lead MSE package with four missing pins.
Features
- Wide Operating Input Voltage Range: 4V to 150V
- Synchronous Operation for Highest Efficiency
- Internal High Side and Low Side Power MOSFETs
- No Compensation Required
- Adjustable 10mA to 100mA Maximum Output Current
- Low Dropout Operation: 100% Duty Cycle
- Low Quiescent Current: 12µA
- Wide Output Range: 0.8V to VIN
- 0.8V ±1% Feedback Voltage Reference
- Precise RUN Pin Threshold
- Internal or External Soft-Start
- Programmable 1.8V, 3.3V, 5V or Adjustable Output
- Few External Components Required
- Programmable Input Overvoltage Lockout
- Thermally Enhanced High Voltage MSOP Package
Typical applications
- Industrial Control Supplies
- Automotive
- Medical Devices
- Distributed Power Systems
- Battery-Operated Devices
- Avionics
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(mm) | f(mm) | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | Pins | Version | Type | H(mm) | IR(A) | Packaging | Working Voltage(V (AC)) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT(V (RMS)) | Mount | L(µH) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMSW SMT Mono-color Side View Waterclear, 1.6 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMSW SMT Mono-color Side View Waterclear | Length1.6 mm | – | Dominant Wavelength [typ.]470 nm | Emitting ColorBlue | Peak Wavelength [typ.]465 nm | Luminous Intensity [typ.]145 mcd | Forward Voltage [typ.]3.2 V | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | Height0.8 mm | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +85 °C | – | MountSMT | – | ||||
 | WR-PHD Pin Header, 6 mm, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | Length6 mm | – | – | – | – | – | – | – | – | Pins3 | – | TypeStraight | – | Rated Current2 A | PackagingBag | Working Voltage200 V (AC) | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | MountTHT | – | |||
 | WE-LAN LAN Transformer, 17.55 mm, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LAN LAN Transformer | Length17.55 mm | – | – | – | – | – | – | – | – | Pins24 | VersionSMT | Type4PPoE (to 900 mA) | Height98.8 mm | – | – | – | Data rate10/100/1000BASE-T | Ports1 | PoE4PPoE (up to 1000 mA) | Improved Common Mode RejectionNo | Operating Temperature -40 °C up to +105 °C | Insulation Test Voltage1500 V (RMS) | MountSMT | Inductance350 µH | ||||
 | WA-SNSR Self-Retaining Spacer, 19.1 mm, 4.8 mm | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SNSR Self-Retaining Spacer | Length19.1 mm | Drilling in Panel4.8 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -30 °C up to +85 °C | – | – | – | |||
 | WR-BHD 2.54 mm Male, 33.06 mm, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-BHD 2.54 mm Male | Length33.06 mm | – | – | – | – | – | – | – | – | Pins20 | VersionLow Profile | TypeAngled | – | Rated Current3 A | PackagingTray | Working Voltage250 V (AC) | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | MountTHT | – |