Sharp PQ3RF43 Datasheet

Low Power-Loss Voltage Regulators

PQ3RF43

PQ3RF43

3.3V/4.6V Output Low Power-Loss Voltage Regulator

■ Features

¡Low power-loss
(Dropout voltage : MAX.0.5V at Io = 4.0A)
(Dropout voltage : MAX.1.0V at Io = 4.6A)

¡Compact resin full-mold package (TO-220 package)
¡3.3V/4.6A output type
¡High-precision output voltage type

Output voltage precision : ±2.5%

¡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

10.2MAX

7.4±0.2

PQ3RF43

29.1MAX

13.5MIN

●1 ●2 ●3 ●4

Internal connection diagram

12

Control circuit

3

3.6±0.2

φ3.2±0.1

+0.3

4-1.4

-0

+0.2

4-0.6

-0.1

3-(2.54)

4

(Unit : mm)

4.5±0.2

2.8±0.2

(0.5)

1 DC input (VIN)
2 DC output (V
3 GND
4 ON/OFF control

terminal (V

C

)

4.8MAX

(1.5)

O

)

15.6±0.5

■ Absolute Maximum Ratings

*1

Input voltage

*1

ON/OFF control terminal voltage
Output current
Power dissipation (No heat sink)
Power dissipation (With infinite heat sink)

*2

Junction temperature
Operating temperature
Storage temperature
8 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

j

=<150˚C.

V

IN

V

C

I

O

P

D1

P

D2

T

j

T

opr

T

stg

T

sol

(Ta=25˚C)

10
10

4.6

1.8
18

150

-20 to +80

-40 to +150

260 (For 10s.)

V
V

A
W
˚C

˚C
˚C
˚C

· Please refer to the chapter“ Handling Precautions ”.

Low Power-Loss Voltage Regulators

PQ3RF43

■ Electrical Characteristics

(Unless otherwise specified, conditions shall be VIN=5V,IO=2.0A,Ta=25˚C)

Parameter Symbol Conditions
Output voltage
Load regulation
Line regulation
Temperature coefficient of output voltage
Ripple rejection
Dropout voltage (1)
Dropout voltage (2)

*4

ON-state voltage for control
ON-state current for control
OFF-state voltage for control
OFF-state current for control
Quiescent current

*3

Input voltage shall be the value when output voltage is 95% in comparison with the initial value.

*4

In case of opening control terminal4, output voltage turns on.

RegL

R

T

V
Vi-

V

I

C (ON)

V

C (OFF)

I

C (OFF)

V

O

eg

CVO

RR

i-O(1)

O(2)

C (ON)

I

q

I

O

=5mA to 4.6A

I

IN

=4 to 10V

V

j

=0 to 125˚C

T

*3

, IO=4.0A

*3

, IO=4.6A

C

=2.7V

V

C

=0.4V

V

O

=0A

I

Fig.1 Test Circuit

V

IN

0.33µF

●2●1

V

C

●4

●3

A

A

I

q

I

C

47µF

+

V

O

I

O

A

V

R

L

~

-

-

-

-

3.218

-

-

-

45

-

-

2.0

-

-

-

-

3.3

0.5

0.5

±0.02

55

-

-

-

-

-

-

-

3.382

2.0

2.5

-

-

0.5

1.0

-

20

0.8

- 0.4
17

Fig.2 Test Circuit for Ripple Rejection

+

47µF

●2●1

e

i

0.33µF

V

IN

●4

●3

I

O

+

R

V

C

e

V

L

~

f=120Hz (sine wave)

i

=0.5V

e

o

IO=0.5A
RR=20 log (e

rms

UnitMAX.TYP.NIN.

V
%
%

%/˚C

dB

V

V

V

µA

V

mA
mA

i/eo

)

Fig.3 Power Dissipation vs. Ambient

Temperature

20

P

D2

15

(W)

D

10

PD1 :No heat sink
P

D2

:With infinite heat sink

5

Power dissipation P

P

D1

0

-20 0
Ambient temperature Ta (˚C)

Note) Oblique line portion:Overheat protection may

operate in this area.

20 40 60 80

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 10.0

Output current IO (A)