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Texas Instruments TPS62821 | Demoboard TIDA-01579
High efficiency, low-output ripple power supply reference design for imaging application
Overview
| Topology | Buck Converter |
| Input voltage | 5 V |
| Output 1 | 3.3 V |
| IC revision | E1 |
Description
The point-of-load power-tree on video surveillance systems is optimized with this reference design. This reference design has a high performance on key parameters such as output voltage accuracy, voltage ripple, and thermal dissipation. This high performance is possible with a small board area and low BOM cost. This design operates from a 5-V supply commonly found in video doorbells, IP network cameras, and wireless cameras.
Features
- 1% typical output voltage accuracy
- High system efficiency to 90% at full load
- Voltage ripple < 60-μV, useful for noise-critical peripherals
- Thermal hot spot is < 45°C at full load current
- Power supply spur free dynamic resolution greater than 80dBSmall form factor
Typical applications
- POL supply in Portable/Battery Powered Devices
- Mobile Computing, Networking Cards / Solid State Drive / Data Terminal, Point of Sale / Servers, Projectors, Printers
- Factory and Building Automation
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | ISAT1(A) | ISAT2(A) | RDC max.(mΩ) | fres(MHz) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR(A) | Z @ 1 GHz(Ω) | H(mm) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PMCI Power Molded Chip Inductor, 1 µH, 1.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance1 µH | Saturation Current 11.55 A | Saturation Current 23.45 A | DC Resistance75 mΩ | Self Resonant Frequency120 MHz | – | – | – | Rated Current3.3 A | – | Height1 mm | – | ||||
 | WE-MPSB EMI Multilayer Power Suppression Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MPSB EMI Multilayer Power Suppression Bead | – | – | – | DC Resistance80 mΩ | – | Impedance @ 100 MHz600 Ω | Maximum Impedance551 Ω | Maximum Impedance108 MHz | Rated Current2.1 A | Impedance @ 1 GHz103 Ω | Height0.9 mm | TypeHigh Current |