VRAF-08AT51 Datasheet, PDF (1/8 Pages) Bel Fuse Inc. – NON-ISOLATED DC/DC CONVERTERS

NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
Vddq/2 8 A Output
Sep. 29, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
VRAF-08AT51 RoHS Compliant Rev.D
 Non-Isolated
 High Efficiency
 Fixed Frequency
 Low Cost
 Tracking a Reference for
Output Voltage
 High Power Density
 Under-Voltage Lockout
 Output Enable
 OCP/SCP
 Current Source/Sink Capability
 Over Voltage Protection
(Hiccup Mode)
Description
The Bel VRAF-08AT51 module is a non-isolated, step down dc/dc power converter that operates from a nominal
12 Vdc or wide range 10.8 Vdc to 13.2 Vdc source. This converter is designed specifically to provide bus
termination voltages in applications such as DDR (double data rate) memory where the bus termination voltage
must closely track the I/O bus voltage. The converter accepts a reference input and uses this to program its
output voltage to 50% of the reference. The unit is packaged in compact single-in-line footprint and provides a
maximum 8 A output. Standard features include remote on/off, input under-voltage lockout, output over voltage
protection.
Part Selection
Output
Voltage
Input Voltage
0.9 V
10.8 V - 13.2 V
Max. Output
Current
8A
Max. Output
Power
7.2 W
Typical
Efficiency
69%
Model Number
VRAF-08AT51
Notes: 1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
2. Add “G” suffix at the end of the model numbers listed above to indicate “Tray Packaging”.
Part Number Explanation
V R AF – 08 A T5 1
1 2 3 45 6 7
1---Vertical Mount
2---RoHS 6, change “R” to “7” means RoHS 5
3---0.65"x0.41" DDR
4---Output current 8A
5---12V narrow range, 10.8-13.2V
6---Vout =0.5Vddq
7---Option
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel [phone]  Fax [phone]  www.belfuse.com