SHARP PQ30VB11

Low Power-Loss Voltage Regulators
PQ30VB11
PQ30VB11
Variable Output Low Power-Loss Voltage Regulator(Built-in Overheat Shut-Down Function)
■ Outline Dimensions
¡Compact resin full-mold package
¡Low power-loss (Dropout voltage : MAX. 0.5V)
¡Overheat shut-down function (keep shut-down output until
power-on again)
¡Variable output voltage (Setting range : 1.5 to 30V)
¡Overcurrent protection type
¡High-precision output type (Reference voltage precision :
±2.0%)
(Unit : mm)
4.5±0.2
10.2MAX
2.8±0.2
13.5MIN
29.1MAX
PQ30VB11
φ3.2±0.1
4-1.4
+0.3
-0
4-0.6
+0.2
-0.1
(1.5)
■ Applications
(0.5)
3-(2.54)
¡Series power supply for TVs and VCRs
¡Switching power supply
4.8MAX
15.6±0.5
7.4±0.2
3.6±0.2
■ Features
1
● 2
● 3
● 4
●
Internal connection diagram
1
2
Specific IC
4
3
■ Absolute Maximum Ratings
Parameter
*1
*1
*2
*3
*1
*2
*3
Input voltage
Output adjustment terminal voltage
Output current
Power dissipation (No heat sink)
Power dissipation (With infinite heat sink)
Junction temperature
Operating temperature
Storage temperature
Soldering temperature
1 DC input (VIN)
2 DC output (VO)
3 GND
4 Output voltage
minute
adjustment
terminal (VADJ)
(Ta=25˚C)
Symbol
VIN
VADJ
IO
PD1
PD2
Tj
Topr
Tatg
Tsol
Rating
35
7
1
1.25
12.5
150
-20 to +80
-40 to +150
260
Unit
V
V
A
W
W
˚C
˚C
˚C
˚C
All are open except GND and applicable terminals.
Overheat shut-down function operates at Tj>=110˚C.
For 10s
· Please refer to the chapter“ Handling Precautions ”.
“ 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. ”
Low Power-Loss Voltage Regulators
■ Electrical Characteristics
(Unless otherwise specified, condition shall be VIN=15V, Vo=10V, Io=0.5A, R1=390Ω, Ta=25˚C)
Parameter
Input voltage
Output voltage
Load regulation
Line regulation
Ripple rejection
Reference voltage
Temperature coefficient of reference voltage
Dropout voltage
Quiescent current
Overheat shut-down temperature
*4
PQ30VB11
Symbol
VIN
VO
RegL
RegI
RR
Vref
TeVref
Vi-O
Iq
Tsd
Conditions
IO=5mA to 1A
VIN=11 to 28V
Refer to Fig. 2
MIN.
4.5
1.5
45
1.225
110
Tj=0 to 125˚C, IO=5mA
*4, IO=0.5A
IO=0
TYP.
0.3
0.5
55
1.25
±1.0
130
MAX.
35
30
1.0
2.5
1.275
0.5
7
150
Unit
V
V
%
%
dB
V
%
V
mA
˚C
Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
Fig.1 Test Circuit
VIN
1
●
R2
3
●
0.33µF
A
VO
47µF
2
●
IO
A
4
●
+
V
Vref
R1
Iq 390Ω
R2
R2 =1.25X 1+ ----------VO=Vref X 1+ ----------R1
R1
[R1=390Ω,Vref =1.25V]
RL
V
Fig.2 Test Circuit of Ripple Rejection
1
●
ei
47µF
2
●
~
R2
3
●
VIN
0.33µF
4
●
+
IO
+
R1
390Ω
Fig.3 Power Dissipation vs. Ambient
Temperature
V
~ eo
IO=0.5A
f=120Hz (sine wave)
ei=0.5Vrms
RR=20 log (ei/eo)
RL
Fig.4 Overcurrent Protection
Characteristics (Typical Value)
PD1 :No heat sink
PD2 :With infinite heat sink
Relative output voltage (%)
Power dissipation PD (W)
13
12
PD2
11
10
9
8
7
6
5
4
3
2
PD1
1
0
-20
0
50
100
150
Ambient temperature Ta (˚C)
Note) Oblique line portion:Overheat protection operates in this
area.
100
80
60
40
20
0
0.5
1.0
1.5
Output current IO (A)
2.0
Low Power-Loss Voltage Regulators
Fig.5 Output Voltage Adjustment
Characteristics
PQ30VB11
Fig.6 Output Voltage vs. Input Voltage
30
25
9
Output voltage VO (V)
Output voltage VO (V)
10
R1=390Ω
20
15
10
5
0
0.01
8
1
4
3
2
1
1 2 3 4 5 6 7 8 9 10 11 12
Input voltage VIN (V)
10
Fig.8 Circuit Operating Current vs. Input
Voltage
40
Circuit operating current IBIAS (mA)
0.5
0.45
Dropout voltage Vi-O (V)
0.4
IO=1A
0.3
0.75A
0.2
0.5A
0.15
0.1
0.25A
0.05
0
-25
0
25
50
75
100
Junction temperature Tj (˚C)
125
Fig.9 Output Peak Current vs. Junction
Temperature
Output peak current IOP (A)
2.2
2
1.8
RL=10Ω
6
5
0
0.1
Fig.7 Dropout Voltage vs. Junction
Temperature
0.25
RL=∞Ω
RL=20Ω
7
R2 (kΩ)
0.35
Tj=25˚C
VO=10V
R1=390Ω
R2=2710Ω
VIN-VO=5V
2V
1V
1.6
0.5V
1.4
IOP:Output current when output voltage
1.2 is 95% in comparison with the initial value
-25
0
25
50
75
100
Junction temperature Tj (˚C)
125
35
30
Tj=25˚C
VO=10V
R1=390Ω
R2=2710Ω
25
20
RL=10Ω
15
RL=20Ω
10
RL=∞Ω
5
0
1 2 3 4 5 6 7 8 9 10 1112 1314 15
Input voltage VIN (V)
Low Power-Loss Voltage Regulators
PQ30VB11
■ Overheat Shut-down Characteristics
ON
VIN
OFF
*Tsd
Tj
VO
* Tsd:Overheat shut-down temperature (Tj>=110˚C)
1 Overheat shut-down operates at Tj=Tsd and output OFF-state is maintained.
2 OFF-state is kept until VIN is once turned off.
■ ON/OFF Operation
D1
1
●
VIN
D2
4
●
R1
+
3
●
VADJ
R2
VO
2
●
R2
CIN
D2
VADJ
R1
R3
CO
RL
RD
RL
VO’
VC
High : Output OFF
Low : Output ON
Equivalent Circuit
in OFF-state
¡ON/OFF operation is available by mounting externally D2 and R3.
¡When VADJ is forcibly raised above Vref (1.25V TYP) by applying the external signal, the output is turned off(pass transistor of
regulator is turned off). When the output is OFF, VADJ must be higher then Vref MAX., and at the same time must be lower than
maximum rating 7V.
In OFF-state, the load current flows to RL from VADJ through R2. Therefore the value of R2 must be as high as possible.
¡VO'=VADJXRL/ (RL+R2)
occurs at the load. OFF-state equivalent circuit R1 up to 10kΩ is allowed. Select as high value of RL and R2 as possible in this range.
In some case, as output voltage is getting lower (VO<1V), impedance of load resistance rises. In such condition, it is sometime
impossible to obtain the minimum value of VO'.So add the dummy resistance indicated by RD in the figure to the circuit parallel to the
load.