
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
3.0 Vdc - 5.5 Vdc Input, -5 Vdc/1 A, -5.2 Vdc/1 A, -12 Vdc/0.5 A Outputs
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
V
O
= -5.0 V
V
O
= -5.2 V
V
O
= -12 V
-5.1 V
-5.304 V
-12.24 V
-5.0 V
-5.2 V
-12 V
-4.90 V
-5.096 V
-11.76 V
Vin=5.0 V, lout=half load; with 220 uF/10
V tantalum capacitor & 0.1 uF ceramic
capacitor (Vo= -5 V & -5.2 V) or two 47
uF/25 V tantalum capacitors & 0.1uF
ceramic capacitor (Vo= -12 V).
Line Regulation
V
O
= -5.0 V, -5.2 V
V
O
= -12 V
-20 mV
-120 mV
-60 mV
-120 mV
-80 mV
-240 mV
-
-
-
-
-
-
0 A
0 A
-
-
-
-
-
-
-
20 mV
120 mV
60 mV
120 mV
80 mV
240 mV
40 mV
50 mV
70 mV
120 mV
130 mV
240 mV
1 A
0.5 A
-
0.01 A
2
s
Load Regulation
V
O
= -5.0 V, -5.2 V
V
O
= -12 V
Regulation Over Temperature
(-40
°
C to +85
°
C)
V
O
= -5.0 V, -5.2 V
V
O
= -12 V
Ripple and Noise (rms)
V
O
= -5.0 V
Vo= -5.2 V
V
O
= -12 V
25 mV
25 mV
40 mV
90 mV
100 mV
120 mV
-
-
200%
Ripple and Noise (pk-pk)
V
O
= -5.0 V
Vo= -5.2 V
V
O
= -12 V
Test conditions:
BW = 0-20 MHz; with 220 uF/10V tantalum
capacitor & 0.1 uF ceramic capacitor (Vo= -
5 V & -5.2 V) or two 47 uF/25 V tantalum
capacitors & 0.1 uF ceramic capacitor (Vo=-
12 V).
Output Current Range
V
O
= -5.0 V, -5.2 V
V
O
= -12 V
Output DC Current Limit
Short Circuit Surge Transient
-
-
Turn on Time
Overshoot at Turn on
Output Capacitance
-
-
10 mS
0%
-
-
30 mS
3%
470 uF
150 uF
V
O
= -5.0 V, -5.2 V
V
O
= -12 V
220 uF
100 uF
Transient Response
Overshoot
Settling Time
Overshoot
Settling Time
-
-
-
-
80 mV
40 uS
80 mV
40 uS
130 mV
50 uS
-
-
-
-
-
-
50% ~ 100%
Max Load
100% ~ 50%
Max Load
Vo= -5.0 V,
-5.2 V
Overshoot
-
50% ~ 100%
Max Load
Settling Time
-
Overshoot
-
130 mV
50 uS
-
-
100% ~ 50%
Max Load
Settling Time
V
O
= -12 V
-
Test Conditions:
di/dt = 0.1 A/uS; Vin = 5.0 V; Ta =
25
°
C and with 220 uF/10 V Tantalum
capacitor & 0.1 uF ceramic capacitor
(Vo= -5 V & -5.2 V) or two 47 uF/25 V
tantalum capacitors & 0.1 uF ceramic
capacitor (Vo=-12 V).
Note:
All specifications are typical at nominal input, full load at 25
°
C
unless otherwise stated.