Design Specifications
| Inputs |
Outputs #1 |
| VinMin=6V |
Vout1=3.3V |
| VinMax=24V |
Iout1=10A |
Design Description
The LM3152-3.3 demonstration board is part of the Power-
Wise® family of SIMPLE SWITCHER® Controllers. It has
been designed to balance solution size and performance.
The Constant-On-Time (COT) Emulated Ripple Mode (ERM)
Control allows for the use of low ESR output capacitors and
therefore decreases the output voltage ripple while maintaining
a fast transient response. There is no loop compensation
required for the COT architecture, as there is in voltage-mode
and current mode control architectures, which helps to facilitate
the ease of design and fast transient response. The
demo board uses a 2-layer, 2 ounce copper PCB with all of
the components mounted on the top side. The LM3152-3.3
IC has a fixed output voltage of 3.3V and will operate over the
input voltage range of 6V to 24V at 10A load current. The
components within the dashed line of the board photo in Figure
3, represent the total design solution. The aluminum
electrolytic input capacitor Cin1 is used for input filter damping
when using long leads, which contributes to parasitic inductance
in the lab while using the demo board. Cin1 along with
the input/output posts and EN test point connector may not
be needed when the final circuit is integrated in the system
design. |
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Design Resources
Additional Resources
Board Photo
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Features
- Easy To Use with Webench and Offline Design Tools
- No Loop Compensation Required
- Low Solution Component Count
- Ultra-Fast Transient Response
- Low Output Voltage Ripple (32mVpp)
- 3.3V Fixed Output Voltage
- Optimized for 10A Average Load Current
- 95% Peak Efficiency
- Constant-On-Time with Emulated Ripple Mode Control
- 500kHz Switching Frequency
Applications
- High Performance DSPs, FPGAs, ASICs and microprocessors
- Broadband, Networking and Optical Communications Infrastructure
- Routers
- Security Surveillance
- Power Modules
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CAD Design Files (Source Schematic and Board Layout)
LM3152-3.3DEMO Board