
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12 Vdc Input
0.9 Vdc - 5.0 Vdc/20 A Output
Input Specifications (continued)
Parameter
Input Reflected Ripple Current (pk-pk)
Min
Typ
280 mA
250 mA
200 mA
150 mA
80 mA
70 mA
45 mA
40 mA
540 uF
9.0 V
7.6 V
Max
350 mA
320 mA
280 mA
250 mA
120 mA
100 mA
80 mA
60 mA
-
9.5 V
8.3 V
Notes
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
-
-
-
Input Reflected Ripple Current (rms)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
-
-
-
Tested with simulated source
impedance of 1.5 uH 5Hz to 20 MHz,
and 2
×
270 uF/16 V Oscon
capacitors (ESR
≤
20 m
) at the
input
External Input Capacitance
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Note
: All specifications are typical at 25
°
C
unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
-
8.5 V
7.0 V
Min
Typ
-
Max
Notes
-2.5%Vo,set
2.5%Vo,set
Vin=12 V, lo=lomax, full load
Over all operating input voltage, resistive
load, and temperature conditions
Output Voltage Set Point
-3.5%Vo,set
-
3.5%Vo,set
Load Regulation
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
-
-
-
-
-
-
-
-
0.4%Vo,set
0.4%Vo,set
0.5%Vo,set
1%Vo,set
Io=Iomin to Iomax
Line Regulation
Output Ripple and Noise (pk-pk)
-
-
-
-
-
-
-
-
-
-
0.5%Vo,set
Vin=Vinmin to Vinmax
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
65 mV
60 mV
55 mV
45 mV
18 mV
15 mV
15 mV
10 mV
-
-
-
5 mS
0%Vo
-
-
-
80 mV
75 mV
70 mV
55 mV
25 mV
25 mV
20 mV
15 mV
20 A
40 A
0.1 A
2
s
10 mS
3%Vo
5080 uF
7840 uF
11000 uF
Tested at 0-20 MHz BW, with a
680 uF/6.3 V Oscon capacitor (ESR
≤
12
m
), 10uF/16V Tantalum capacitor, and
10nF ceramic capacitor at the output.
Output Ripple and Noise (rms)
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=0.9 V
Output Current
Current Limit Threshold
Short Circuit Surge Transient
Turn on Time
Overshoot at Turn on
Output Capacitance
0 A
25 A
-
-
-
680 uF
680 uF
680 uF
Vo=5.0 V
Vo=2.5 V
Vo=0.9 V
Transient Response
50% ~ 75% Max Load
-
-
-
-
100 mV
40 uS
100 mV
40 uS
150 mV
80 uS
150 mV
80 uS
Settling Time
75% ~ 50% Max Load
Settling Time
V
O
=0.9 V-
5.0 V
di/dt=2.5 A/uS; Vin=12 V; with a 680 uF/6.3
V Oscon capacitor (ESR
≤
12 m
),
10 uF/16 V Tantalum capacitor and 10 nF
ceramic capacitor at the output.
Note
: All specifications are typical at nominal input, full load at 25
°
C
unless otherwise stated.