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NCV890201GEVB
NCV890201 Automotive
Grade High-Frequency
Buck Regulator Evaluation
Board User's Manual
Description
The NCV890201 demonstration board provides a convenient way to
evaluate a high-frequency buck converter design. No additional
components are required, other than dc supplies for the input and
enable voltages. An external clock can be used to synchronize the
switching frequency; and the board also provides a synchronization
output, enabling it to be used as a master. It is configured for a 3.3 V
output with a 2 MHz switching frequency and a 2.0 A maximum
output current, over the typical 4.5 V to 18 V automotive input voltage
range. In addition, the board regulates up to 36 V thanks to switching
frequency foldback.
Key Features
•
3.3 V Output Voltage
•
2 MHz Switching Frequency
•
2.0 A Current Limit
•
Wide Input Voltage of 4.5 V to 36 V
•
Regulates through Load Dump Conditions
•
External Clock Synchronization up to 2.5 MHz
•
Synchronization Output
•
Automotive Grade
© Semiconductor Components Industries, LLC, 2011
December, 2011 − Rev. P1
Figure 1. NCV890201GEVB Board Picture
1
http://onsemi.com
EVAL BOARD USER'S MANUAL
Publication Order Number:
EVBUM2050/D
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Summary of Contents for ON Semiconductor NCV890201GEVB
- Page 1 • Regulates through Load Dump Conditions • External Clock Synchronization up to 2.5 MHz • Synchronization Output • Automotive Grade Figure 1. NCV890201GEVB Board Picture Publication Order Number: © Semiconductor Components Industries, LLC, 2011 December, 2011 − Rev. P1 EVBUM2050/D...
- Page 2 NCV890201GEVB Table 1. DEMONSTRATION BOARD TERMINALS Terminal Function Positive dc input voltage Common dc return VOUT Regulated dc output voltage Enable input SYNCI Input for external clock synchronization SYNCO Output for synchronizing other boards Table 2. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND)
- Page 3 NCV890201GEVB Figure 2. NCV890201GEVB Board Schematic Operational Guidelines 1. Connect a dc input voltage, within the 4.5 V to 36 V range, between VIN and GND 2. Connect a load between VOUT and GND 3. Connect a dc enable voltage, within the 4.5 V to 36 V range, between EN and GND 4.
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Page 4: Typical Performance
NCV890201GEVB TYPICAL PERFORMANCE Efficiency Figure 4. Efficiency at 2 MHz for a 3.3 V output Start−up Figure 5. Typical start−up with V = 13.2 V, Figure 6. Typical start−up with V = 13.2 V, = 3.3 V and I = 0.2 A = 3.3 V and I... - Page 5 NCV890201GEVB Load Transients Figure 7. Load transient 0.1 A to 2.0 A, with V = 3.3 V and V = 13.2 V Figure 8. Load transient 0.2 A to 2.0 A, Figure 9. Load transient 2.0 A to 0.2 A, with V = 3.3 V and V...
- Page 6 NCV890201GEVB Synchronization SYNCI SYNCO VOUT Figure 10. Starting synchronization at 2.5 MHz (from free−running) Minimum on time VOUT 80 ns Figure 11. Minimum on time seen during a load transient http://onsemi.com...
- Page 7 NCV890201GEVB Schematic http://onsemi.com...
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Page 8: Pcb Layout
NCV890201GEVB PCB LAYOUT Figure 12. Top View Figure 13. Bottom View http://onsemi.com... - Page 9 PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: N. American Technical Support: 800−282−9855 Toll Free ON Semiconductor Website: www.onsemi.com Literature Distribution Center for ON Semiconductor USA/Canada Order Literature: http://www.onsemi.com/orderlit P.O. Box 5163, Denver, Colorado 80217 USA Europe, Middle East and Africa Technical Support: Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada...
- Page 10 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: ON Semiconductor NV890201MWTXGEVB...
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