Page 1
Low Power-Loss Voltage Regulators
PQ7DV5
Variable Output Type, High Output Current (5A) Type Low Power-loss Voltage Regulators
PQ7DV5
■ Features
¡TO-3P package
¡Low power-loss (Dropout voltage:MAX. 0.5V at Io=5A)
¡Variable output type (1.5V to 7V)
¡Minimum input voltage : 3.0V
¡High output current type (5A)
¡Reference voltage precision : ±2.0%
¡Built-in ON/OFF control function
¡Built-in overcurrent protection, overheat protection
function
■ Applications
¡Power supplies for various electronic equipment such as
personal computers
■ Outline Dimensions
17.0MAX
PQ7DV5
19±0.5
39.0MAX
4-(2.54)
12345
Internal connection diagram
1
Reference
voltage
5-0.8±0.2
controller
comparator
5±0.2
3.7MAX
6
17.0MIN
2
4
5
3
4.5±0.2
2.0±0.2
(0.6)
1 DC input (VIN)
2,6 DC output (V
3 GND
4 ON/OFF control
C)
terminal (V
5 Output voltage
minute
adjustment
ADJ)
terminal (V
(Unit : mm)
(1.4)
O)
■ Absolute Mximum Ratings
*1
Input voltage
*1
ON/OFF control terminal voltage
*1
Output adjustment terminal voltage
Output current
Power dissipation (No heat sink)
Power dissipation (With infinite heat sink)
*2
Junction temperature
Operating temperature
Storage temperature
Soldering temperature
*1
All are open except GND and applicable terminals.
*2
Overheat protection may operate at 125=<T
“ In the absence of confirmation by device specification sheets,SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices
shown in catalogs,data books,etc.Contact SHARP in order to obtain the latest version of the device specification sheets before using any SHARP's device. ”
Parameter Symbol Rating Unit
V
IN
V
C
V
ADJ
I
O
P
D1
P
D2
T
j
T
opr
-20 to +80
T
stg
-40 to +150
T
sol
260(For 10s)
j=<150˚C.
(Ta=25˚C)
10
10
5
5.0
2.2
60
150
V
V
V
A
W
W
˚C
˚C
˚C
˚C
· Please refer to the chapter“ Handling Precautions ”.
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Low Power-Loss Voltage Regulators
PQ7DV5
■ Electrical Characteristics
(Unless otherwise specified, conditions shall be VIN=5V, IO=2.5A, VO=3V [R1=2kΩ] Ta=25˚C)
Parameter Symbol Conditions
Input voltage
Output voltage
Reference voltage
Load regulation
Line regulation
Temperature coefficient of reference voltage
Ripple rejection
Dropout voltage
*3
ON-state voltage for control
ON-state current for control
OFF-state voltage for control
OFF-state current for control
RegL
R
T
V
V
I
V
I
C (OFF)
V
V
V
RR
C (ON)
C (ON)
C (OFF)
Quiescent current
*3
In case of opening control terminal 4, output voltage turns on.
Fig.1 Test Circuit
0.33µF
V
IN
●4
V
C
A
●2●1
R
V
●5
●3
A
Iq2kΩ
R
47µF
2
ref
1
V
A
+
Fig.2 Test Circuit for Ripple Rejection
0.33µF
e
i
~
V
IN
●4 ●5
VC
2.7V
●2●1
●3
V
2kΩ
47µF
R2
R1
+
ref
IN
O
ref
eg
CVO
i
-o
I
q
I
V
I
O
R
L
+
RL
O
I
V
T
V
V
V
o
I
O
V
O
I
e
o
V
~
=5mA to 5.0A
IN
=4 to 10V
j
=0 to 125˚C
IN
=3V, IO=5A
C
=2.7V
C
=0.4V
=0A
Vo=V
ref X
=1.25
1
=2kΩ,V
[R
f=120Hz (sine wave)
i
=0.5V
e
VIN=5V
O
=3V (R1=2kΩ)
V
O
=0.5A
I
RR=20 log (e
(1+R2/R1)
X
(1+R2/R1)
ref
rms
-
-
-
-
-
-
=1.25V]
i/eo
)
3
1.5
1.225
-
-
-
45
-
2.0
-
-
-
-
-
-
1.25
0.5
0.5
±0.01
55
-
-
-
-
-
-
10
7
1.275
2.0
2.5
-
-
0.5
-
20
0.8
- 0.4
17
UnitMAX.TYP.NIN.
V
V
V
%
%
%/˚C
dB
V
V
µA
V
mA
mA
Fig.3 Power Dissipation vs. Ambient
Temperature
60
50
(W)
D
40
30
PD1 :No heat sink
P
D2
:With infinite heat sink
20
Power dissipation P
10
0
-20 0
Note) Oblique line portion:Overheat protection
may operate in this area.
P
D2
D1
P
4020 60 80
Ambient temperature Ta (˚C)
Fig.4 Overcurrent Protection
Characteristics (Typical Value)
100
80
60
40
20
Relative output voltage (%)
0
0 2.0 4.0 6.0 8.0 10 12
Output current IO (A)
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Low Power-Loss Voltage Regulators PQ7DV5
Fig.5 Reference Voltage Deviation vs.
Junction Temperature
10
V
IN
=5V
8
(mV)
V
O
ref
=3V(R1=2kΩ,R2=2.8kΩ)
I
O
=2.5A
6
4
2
0
-2
-4
-6
-8
Reference voltage deviation ∆V
-10
-25 0 25 50 75 100 125
Junction temperature Tj (˚C)
Fig.7 Circuit Operating Current vs. Input
Voltage
a =25˚C
T
V
O=3V
(R
1=2kΩ,
R
2=2.8kΩ)
100
L=0.6Ω
R
R
L=1.2Ω
L=∞
Circuit operating current IBIAS (mA)
0
052413
Input voltage VIN (V)
R
Fig.6 Output Voltage vs. Input Voltage
4
a =25˚C
T
VO=3V(R1=2kΩ,R2=2.8kΩ)
3
2
1
Output voltage VO (V)
0
012345
L=1.2Ω
R
L=∞
R
L=0.6Ω
R
Input voltage VIN (V)
Fig.8 Dropout Voltage vs. Junction
Temperature
0.5
0.4
(V)
-O
i
0.3
0.2
Dropout voltage V
0.1
0
-25 0 5025 10075 125
V
IN
:0.95V
O
VO=3V(R1=2kΩ,R2=2.8kΩ)
I
O
=5A
Junction temperature Tj (˚C)
Fig.9 Quiescent Current vs. Junction
Temperature
20
IN
=5V
V
18
V
O
=3V(R1=2kΩ,R2=2.8kΩ)
I
O
=0A
16
(mA)
14
q
12
10
8
6
4
Quiescent current I
2
0
-25 0 25 50 75 100 125
Junction temperature Tj (˚C)
Fig.10 Ripple Rejection vs. Input Ripple
Frequency
100
80
60
40
IN
=5V
V
20
Ripple rejection RR (dB)
V
O
=3V(R1=2kΩ,R2=2.8kΩ)
Io=0.5A,e
T
0
0.1 101 100
i=0.5Vrms,
a
=25˚C
Input ripple frequency f
(kHz)
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Low Power-Loss Voltage Regulators
PQ7DV5
Fig.11 Ripple Rejection vs. Junction
Temperature
100
80
60
40
V
IN
=5V
20
O
=3V(R1=2kΩ,R2=2.8kΩ)
V
Ripple rejection RR (dB)
O
=0.5A,ei=0.5V
I
rms
f=120Hz
0
-25 0 5025 10075 125
Junction temperature Tj (˚C)
■ Standard Connection
D1
VIN
CIN
●1
●4
●2
R2
●5
●3
R
1
2kΩ
+
Cref
VO
+
CO
Load
ON/OFF
signal
High or Open :Output ON
Low :Output OFF
D1 : This device is necessary to protect the element from damage when reverse voltage may be applied to the regulator in case of
input short-circuiting.
Cref : This device is necessary when it is required to enhance the ripple rejection or to delay the output start-up time*. Otherwise, it
is not necessary.
(Care must be taken since Cref may raise the gain, facilitating oscillation.)
* The output start-up time proportional to Cref X R2.
CIN, CO : Be sure to mount the devices CIN and CO as close to the device terminal as possible so as to prevent oscillation.
The standard specification of CIN= 0.33µF ,CO= 47µF, respectively. However, adjust them as necessary after checking.
R1, R2 : These devices are necessary to set the output voltage. The output voltage VO is given by the following formula:
VO=Vref X (1+R2/R1)
(Vref is 1.25V TYP)
The standard value of R1 is 2Ω. But value up to 10kΩ.
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