PQ7RV4 Datasheet, PDF (2/5 Pages) Sharp Electrionic Components – Variable Output (1.5 to 7V), 4.6A Output Low Power-loss Voltage Regulator

Low Power-Loss Voltage Regulators
PQ7RV4
s Electrical Characteristics
(Unless otherwise specified, conditions shall be VIN=5V,VO=3.3V(R1=2kΩ),Io=2.0A,Ta=25˚C)
Parameter
Input voltage
Output voltage
Load regulation
Line regulation
Reference voltage
Temperature coefficient of reference voltage
Ripple rejection
Dropout voltage(1)
Dropout voltage(2)
Quiescent current
Symbol
VIN
VO
RegL
RegI
Vref
TCVref
RR
Vi-O(1)
Vi-O(2)
Iq
Conditions
-
-
IO=5mA to 4.6A
VIN=4 to 10V
-
Tj=0 to125˚C
-
*4_{, IO=4.0A}
*4_{, IO=4.6A}
IO=0A
MIN.
3.0
1.5
-
-
1.225
-
45
-
-
-
TYP.
-
-
0.5
0.5
1.25
±0.01
55
-
-
-
MAX.
10.0
7.0
2.0
2.5
1.275
-
-
0.5
1.0
17
Unit
V
V
%
%
V
%/˚C
dB
V
V
mA
*4 Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
Fig.1 Test Circuit
VIN
1q
0.33µF
2q
R2
3q ^4q
R1
A Iq 2kΩ
47µF VO
A IO
+
Vref
V
V
RL
Vo=Vref X (1+R2/R1)
=1.25 X (1+R2/R1)
[R1=2kΩ,Vre=1.25V]
Fig.2 Test circuit for Ripple Rejection
ei ~
VIN
1q
0.33µF
2q
R2
3q ^4q
R1
2kΩ
+
f=120Hz (sine wave)
IO
47µF ₊
ei=0.5Vrms
VO=3V
V~ eo _{VIN=5V (R1=2kΩ)}
RL
IO=0.5A
RR=20 log (ei/eo)
Fig.3 Power Dissipation vs. Ambient
Temperature
20
PD2
15
10
PD1 :No heat sink
PD2 :With infinite heat sink
5
PD1
0
-20 0 20 40 60 80
Ambient temperature Ta (˚C)
Note) Oblique line portion:Overheat protection may operate
in this area.
Fig.4
Reference Voltage Deviation vs.
Junction Temperature
5
VIN=5V
4 _VO=3.3V
3 ^R1=2kΩ
IO=2A
2
1
0
-1
-2
-3
-4
-5
-25 0 25 50 75 100 125
Junction temperature Tj (˚C)