NON-ISOLATED DC/DC CONVERTERS
2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /6 A Outputs
January 13, 2011
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Example Application Circuit
Requirements:
Vin:
3.3V
Vout:
1.8V
Iout:
ΔVout:
Vin, ripple
4.5A max., worst case load transient is from 3A to 4.5A
1.5% of Vout (27mV) for worst case load transient
1.5% of Vin (50mV, p-p)
Vout+
Vin+
VIN
VOUT
SENSE
RTUNE
CTUNE
RTrim
MODULE
+
CI1
CI2
CO1
ON/OFF
GND
TRIM
Q3
CI1
CI2
2x22μF/6.3V ceramic capacitor
47μF/6.3V bulk electrolytic
CO1
5 x 47μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19)
CTune
RTune
RTrim
47nF ceramic capacitor (can be 1206, 0805 or 0603 size)
33 ohms SMT resistor (can be 1206, 0805 or 0603 size)
1kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
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BEL [ BEL FUSE INC. ]
