ng rs
i
ch to
it la
Sw egu
R
SI-8050JD
Step-Down
to 5.0 V, 1.5 A,
DC/DC Converter
ELECTRICAL CHARACTERISTICS
at T
A
= +25°C, V
I
= 20 V, I
O
= 0.5 A (unless otherwise noted).
Limits
Characteristic
Output Voltage
Ref. Volt. Temp. Coeff.
Output Short-Circuit Current
Efficiency
Operating Frequency
Line Regulation
Load Regulation
Quiescent Current
Symbol
V
O
Test Conditions
Min.
4.90
—
See note
1.6
—
—
V
I
= 10 V ~ 30 V, I
O
= 0.5 A
V
I
= 20 V, I
O
= 0.2 A ~ 0.8 A
I
O
= 0 A
V
CE
= 0.3 V
Chip Enable Voltage
Soft-Start Current
V
CE
I
SS
Converter turn-off voltage
V
SS
= 0 V
—
—
—
—
—
—
Typ.
5.00
±0.5
—
82
125
40
10
7.0
—
—
—
Max.
5.10
—
—
—
—
100
40
—
200
0.5
-100
Units
V
mV/°C
A
%
kHz
mV
mV
mA
µA
V
µA
a
Vref
I
OM
η
f
∆V
O(∆VI)
∆V
O(∆IO)
I
IQ
Typical values are given for circuit design information only.
Note: Output short-circuit current is at point where output voltage has decreased 5% below V
O(nom)
.
SI-8050JD
Test Circuit
C1 = 220 µF/50 V
C2 = 470 µF/25 V
C3 = 0.47 µF/10 V
L1 = 100 µH
D1 = Sanken SFPB-66
www.allegromicro.com
3
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
