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Overview
| Topology | SEPIC Buck-Boost Topology |
| Input voltage | 4.5-20 V |
| Switching frequency | 300-2000 kHz |
| Output 1 | 24 V / 1.6 A |
| IC revision | 1 |
Description
The LT8364 is a current mode DC/DC converter with a 60V, 4A switch operating from a 2.8V to 60V input. With a unique single feedback pin architecture it is capable of boost, SEPIC or inverting configurations. Burst Mode operation consumes as low as 9μA quiescent current to maintain high efficiency at very low output currents, while keeping typical output ripple below 15mV.An external compensation pin allows optimization of loop bandwidth over a wide range of input and output voltages and programmable switching frequencies between 300kHz and 2MHz. A SYNC/MODE pin allows synchronization to an external clock. It can also be used to select between burst or pulse-skip modes of operation with or without Spread Spectrum Frequency Modulation for low EMI. For increased efficiency, a BIAS pin can accept a second input to supply the INTVCC regulator. Additional features include frequency foldback and programmable soft-start to control inductor current during startup.The LT8364 is available in a thermally enhanced 12-lead 4mm × 3mm DFN package or a thermally enhanced 16-lead MSOP package with four pins removed.
Features
- Wide Input Voltage Range: 2.8V to 60V
- Ultralow Quiescent Current and Low Ripple Burst Mode® Operation: IQ = 9μA
- 4A, 60V Power Switch
- Positive or Negative Output Voltage Programming with a Single Feedback Pin
- Programmable Frequency (300kHz to 2MHz)
- Synchronizable to an External Clock
- Spread Spectrum Frequency Modulation for Low EMI
- BIAS Pin for Higher Efficiency
- Programmable Undervoltage Lockout (UVLO)
- Thermally Enhanced 12-lead 4mm × 3mm DFN and 16-lead MSOP packages
Typical applications
- Portable Electronics
- Industrial and Automotive
- Telecom
- Medical Diagnostic Equipment
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | ISAT1(A) | ISAT2(A) | fres(MHz) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(mΩ) | Type | Pins | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PMCI Power Molded Chip Inductor, 0.47 µH, 5.15 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.47 µH | Saturation Current 15.15 A | Saturation Current 29.95 A | Self Resonant Frequency90 MHz | Performance Rated Current7.1 A | Saturation Current @ 10%5.15 A | Saturation Current @ 30%9.95 A | – | – | – | Rated Current 23600 mA | DC Resistance22 mΩ | – | Pins2 | MountSMT | Length3.2 mm | Height1.2 mm | Rated Current7.1 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WE-LHMI SMT Power Inductor, 2.2 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance2.2 µH | – | – | Self Resonant Frequency49 MHz | Performance Rated Current4.05 A | Saturation Current @ 10%4.45 A | Saturation Current @ 30%8.4 A | – | – | – | – | DC Resistance61 mΩ | – | Pins2 | MountSMT | Length4.45 mm | Height1.8 mm | – | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | Impedance @ 100 MHz600 Ω | Maximum Impedance700 Ω | Maximum Impedance150 MHz | Rated Current 22000 mA | DC Resistance150 mΩ | TypeHigh Current | – | MountSMT | Length2 mm | Height0.0009 mm | Rated Current1.5 A | – | Operating Temperature -55 °C up to +125 °C | ||||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | – | – | – | – | – | TypeStraight | Pins10 | MountTHT | Length10 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | – | – | – | – | – | – | Pins2 | – | – | – | Rated Current3 A | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C |