HM5318 [HMSEMI]

Low Quiescent Current_Low Dropout CMOS Voltage Regulator;
HM5318
型号: HM5318
厂家: H&M Semiconductor    H&M Semiconductor
描述:

Low Quiescent Current_Low Dropout CMOS Voltage Regulator

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中文:  中文翻译
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HM53XX  
Low Quiescent Current_Low Dropout CMOS Voltage Regulator  
HM53XX Series 500mA  
The HM53XX series is a family of Low Quiescent  
Low Dropout Positive regulators. developed using  
CMOS technology.  
These ICS perform with high output voltage  
accuracy, low quiescent current , Output current  
500mA,  
The allow operation voltage as high as 10V.  
■ Ferture:  
·high output voltage accuracy  
·low dropout voltage  
·low quiescent current  
·Max input voltage  
·Output current  
±2%  
1.5mV Iout=1mA  
⒈2uA  
10V  
500mA  
Applications  
·
·
·
Power source for home electric/electronic appliances  
Power source for battery-powered devices  
Power source for personal communication devices  
Selection table  
Part NO.  
Output voltage  
Tolerance  
(Note)  
1.2V  
1.5V  
1.8V  
2.1V  
2.5V  
2.7V  
2.8V  
3.0V  
3.3V  
3.6V  
3.8V  
4.4V  
5.0V  
HM5312  
HM5315  
HM5318  
HM5321  
HM5325  
HM5327  
HM5328  
HM5330  
HM5333  
HM5336  
HM5338  
HM5344  
HM5350  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
±2%  
NOTE: for semi_custom parts selectable output voltage from 1.2~7.0V in 0.1v  
increment  
1
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http//www.hmsemi.com  
HM53XX  
Package and Pin Assignment  
Figure 1  
(Ta=25℃ unless otherwise specified)  
Absolute Maximum Ratings:  
Item  
Symbol  
Unit  
Absolute Maximum  
Ratings  
Input voltage  
Output voltage  
Power  
VIN  
VOUT  
PD  
12  
V
Vss-0.3~ VIN+0.3  
SOT_89 500  
Mw  
dissipation  
TO_92  
300  
SOT_23 200  
-40~+85  
Operation  
temperature range  
Storage temperature  
range  
Topr  
Tstg  
-40~+125  
Caution The absolute maximum ratings are rated values exceeding which the  
product could suffer physical damage. These values must therefore not  
be exceeded under any conditions.  
Electrical Characteristics:  
HM53XX series HM5312 , Output voltage +1.2V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
1.2  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN=2. 2V,IOUT=40mA  
VIN= 2.2V  
1.176  
180  
1.224  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=100 mA  
25  
35  
380  
0.2  
mV  
/V  
mV  
1
280  
0.05  
VOUT1  
△VIN·VOUT  
△VOUT2  
2.2V≤VIN≤10V  
IOUT=10mA  
regulation  
Load  
VIN=2.2V  
15  
30  
±100  
2.5  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤100mA  
VIN=2.2V,IOUT=1mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
10  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
2
Shenzhen H&M Semiconductor Co.Ltd  
http//www.hmsemi.com  
HM53XX  
HM53XX series HM5315 , Output voltage +1.5V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
1.5  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN=2. 5V,IOUT=40mA  
VIN= 2.5V  
1.470  
220  
1.530  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=100 mA  
20  
28  
280  
0.2  
mV  
/V  
mV  
1
200  
0.05  
△VOUT1  
△VIN·VOUT  
△VOUT2  
2.5V≤VIN≤10V  
IOUT=10mA  
regulation  
Load  
VIN=2.5V  
15  
30  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤100mA  
VIN=2.5V,IOUT=1mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
HM53XX series HM5318 , Output voltage +1.8V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
1.8  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN=2. 8V,IOUT=40mA  
VIN= 2.8V  
1.764  
280  
1.836  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=100 mA  
15  
21  
210  
0.2  
mV  
/V  
mV  
1
140  
0.05  
VOUT1  
△VIN·VOUT  
△VOUT2  
2.8V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=2.8V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤150mA  
VIN=2.8V,IOUT=1mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
3
Shenzhen H&M Semiconductor Co.Ltd  
http//www.hmsemi.com  
HM53XX  
HM53XX series HM5321 , Output voltage +2.1V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
2.1  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 3.1V,IOUT=40mA  
VIN= 3.1V  
2.058  
320  
2.142  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=100 mA  
13  
18  
180  
0.2  
mV  
/V  
mV  
1
130  
0.05  
△VOUT1  
△VIN·VOUT  
△VOUT2  
3.1V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=3.1V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤150mA  
VIN=3.1V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
HM53XX series HM5325 , Output voltage +2.5V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
2.5  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 3.5V,IOUT=50mA  
VIN= 3.5V  
2.450  
350  
2.550  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=100 mA  
12  
17  
170  
0.2  
mV  
/V  
mV  
1
120  
0.05  
VOUT1  
△VIN·VOUT  
△VOUT2  
3.5V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=3.5V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤150mA  
VIN=3.5V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
4
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http//www.hmsemi.com  
HM53XX  
HM53XX series HM5327 , Output voltage +2.7V ) ( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
2.7  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 3.7V,IOUT=50mA  
VIN= 3.7V  
2.646  
400  
2.754  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200 mA  
12  
18  
300  
0.2  
mV  
/V  
mV  
1
220  
0.05  
△VOUT1  
△VIN·VOUT  
△VOUT2  
3.7V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=3.7V  
25  
40  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤150mA  
VIN=3.7V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
HM53XX series HM5328 , Output voltage +2.8V ) ( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
2.8  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 3.8V,IOUT=50mA  
VIN= 3.8V  
2.744  
400  
2.856  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200 mA  
12  
18  
300  
0.2  
mV  
/V  
mV  
1
220  
0.05  
VOUT1  
△VIN·VOUT  
△VOUT2  
3.8V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=3.8V  
25  
40  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤150mA  
VIN=3.8V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
5
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http//www.hmsemi.com  
HM53XX  
HM53XX series HM5330 , Output voltage +3.0V ) ( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
3.0  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 4V,IOUT=50mA  
VIN= 4V  
2.940  
450  
3.060  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200 mA  
10  
14  
280  
0.2  
mV  
/V  
mV  
1
200  
0.05  
△VOUT1  
△VIN·VOUT  
△VOUT2  
4V≤VIN≤10V  
regulation  
Load  
IOUT=1mA  
VIN=4V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤200mA  
VIN=4V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
HM53XX series HM5333 , Output voltage +3.3V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
3.3  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 4.3V,IOUT=50mA  
VIN= 4.3V  
3.234  
500  
3.366  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200 mA  
10  
14  
280  
0.2  
mV  
/V  
mV  
1
200  
0.05  
VOUT1  
△VIN·VOUT  
△VOUT2  
4.3V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=4.3V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤200mA  
VIN=4.3V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
6
Shenzhen H&M Semiconductor Co.Ltd  
http//www.hmsemi.com  
HM53XX  
HM53XX series HM5336 , Output voltage +3.6V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
3.6  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 4.6V,IOUT=50mA  
VIN= 4.6V  
3.528  
500  
3.672  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200mA  
10  
14  
280  
0.2  
mV  
/V  
mV  
1
200  
0.05  
△VOUT1  
△VIN·VOUT  
△VOUT2  
4.6V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=4.6V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤200mA  
VIN=4.6V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
HM53XX series HM5338 , Output voltage +3.8V)  
(Ta=25℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
3.8  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 4.8V,IOUT=50mA  
VIN= 4.8V  
3.724  
500  
3.876  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200mA  
10  
14  
280  
0.2  
mV  
/V  
mV  
1
200  
0.05  
VOUT1  
△VIN·VOUT  
△VOUT2  
4.8V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=4.8V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤200mA  
VIN=4.8V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
7
Shenzhen H&M Semiconductor Co.Ltd  
http//www.hmsemi.com  
HM53XX  
HM53XX series HM5344 , Output voltage +4.4V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
4.4  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 5.4V,IOUT=50mA  
VIN= 5.4V  
4.312  
500  
4.488  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200mA  
10  
14  
280  
0.2  
mV  
/V  
mV  
1
200  
0.05  
△VOUT1  
△VIN·VOUT  
△VOUT2  
5.4V≤VIN≤10V  
IOUT=1mA  
regulation  
Load  
VIN=5.4V  
30  
45  
±100  
2.5  
10  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤200mA  
VIN=5.4V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
HM53XX series HM5350 , Output voltage +5.0V )  
( Ta=25 ℃ unless otherwise  
specified)  
ITEM  
SYMBOL  
CONDITIONS  
MIN  
TYPE  
5.0  
MAX  
UNITS  
Test  
circuits  
Output voltage  
VOUT  
IOUT  
VIN= 6V,IOUT=50mA  
VIN= 6V  
4.900  
500  
5.100  
V
1
3
Output current  
*1  
mA  
Dropout  
voltage *2  
Line  
Vdrop  
IOUT=10 mA  
IOUT=200 mA  
10  
14  
280  
0.2  
mV  
/V  
mV  
1
200  
0.05  
△VOUT1  
△VIN·VOUT  
△VOUT2  
6V≤VIN≤10V  
regulation  
Load  
IOUT=1mA  
VIN=6V  
30  
45  
±100  
2.5  
15  
regulation  
Temperature  
coefficient  
Current  
1.0mA≤IOUT≤200mA  
VIN=6V,IOUT=10mA  
-40℃≤Ta≤85℃  
VIN=10V No Load  
△VOUT  
△Ta·VOUT  
ISS1  
±50  
1.2  
Ppm/℃  
uA  
2
consumption  
Input  
voltage  
VIN  
--  
V
Short current  
limit  
Ilim  
Vout=0V  
50  
70  
mA  
* ⒈ Increasing output current slowly, The IOUT when output voltage decreasing  
two percent  
*⒉Vdrop=VIN1-(VOUT(E)×0.98V)  
VOUT(E) Effective output voltage, i.e., the output voltage when fixing IOUT( 1mA) and  
inputting VOUT(S) 2.0 V.  
VIN1:is the Input voltage at which output voltage becomes 98  
decreasing input voltage  
of VOUT(E) after gradually  
8
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HM53XX  
Application Circuits:  
Test Circuits  
Figure 3  
9
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HM53XX  
Standard Circuit  
Figure 7  
*1. CIN is a capacitor for stabilizing the input.  
*2. A ceramic capacitor can be used for CL besides a tantalum capacitor.  
*3. In case of product with shutdown function.  
Caution The above connection diagram and constant will not guarantee successful  
operation.  
Perform through evaluation using the actual application to set the constant.  
Input capacitors(CIN): >1.0 µF.  
Output capacitors(CL): >2.2 µF(tantalum capacitors) Or  
>10.0 µF(aluminum capacitors).  
■Technical Terms  
1. Output capacitors (CL)  
Output capacitors are generally used to stabilize regulation operation and to  
improve transient response characteristics. But the HM53XX series can provide  
stable operation without output capacitors. Capacitors are used only to improve  
transient response characteristics. Output capacitors can hence be removed in  
applications in which transient response can be negligible. When an output  
capacitor is used, a low ESR (Equivalent Series Resistance) capacitor like ceramic  
capacitor can also be used.  
2. Output voltage (VOUT)  
The accuracy of the output voltage is ± 2.0% guaranteed under the specified  
conditions for input voltage, which differs depending upon the product items,  
output current, and temperature.  
Caution: If the above conditions change, the output voltage value may vary and go  
out of the accuracy range of the output voltage. See the electrical  
characteristics and characteristics data for details.  
3. Line regulations (ΔVOUT1/ΔVIN*VOUT)  
These parameters indicate the input voltage dependence on the output voltage. That  
is, the values show how much the output voltage changes due to a change in the  
input voltage with the output current remained unchanged.  
10  
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HM53XX  
4. Load regulation (ΔVOUT2)  
This parameter indicates the output current dependence on the output voltage. That  
is, the value shows how much the output voltage changes due to a change in the  
output current with the input voltage remained unchanged.  
5. Dropout voltage (Vdrop)  
This parameter indicates the difference between the input voltage (VIN1) and the  
output voltage when  
output voltage falls to 98 % of VOUT(E) by gradually decreasing the input voltage  
(VIN).  
Vdrop = VIN1-[VOUT(E) × 0.98]  
■Description of Operation  
1.Basic Operation  
Figure 8 shows the block diagram of the HM53XX series.The error amplifier compares  
a reference voltage Vref with a part of the output voltage divided by the feedback  
resistors Rs and Rf, and supplies the gate voltage to the output transistor,  
necessary to ensure certain output voltage independent from change of input voltage  
and temperature.  
VIN  
Current sauce  
*1  
Error amplifier  
VOUT  
Vref  
-
+
Rf  
Vfb  
Reference Voltage circuit  
Rs  
VSS  
*1. Parasitic diode  
Figure 8  
11  
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HM53XX  
2.Output Transistor  
The HM53XX Series uses a Pch MOS FET as the output transistor.  
The voltage at VOUT must not exceed VIN+0.3V. When the VOUT voltage becomes higher  
than that of VIN, reverse current flows and may break the regulator since a  
parasitic diode between VOUT and VIN exists inevitably  
3. Shutdown function (ON/OFF pin)  
The ON/OFF pin controls the start and stop of the regulation operation.  
When the ON/OFF pin is set to shutdown level, halting whole internal circuit and  
turning off the Pch MOS FET between VIN and VOUT, current consumption is  
drastically reduced. The voltage of the VOUT pin becomes VSS level due to the  
internal resistance divider of several MΩ between VOUT and VSS. The ON/OFF pin  
should not be left afloat since no pull-up nor pull-down is made internally as  
shown in figure 9. Note also that a current will flow to the VIN side via the  
parasitic diode inside the IC if a voltage of VIN + 0.3 V or more is applied. When  
the shutdown function is not used, connect the pin to the VIN pin in case of  
positive logic and to the VSS pin in case of negative logic.  
When a regulation operation at light load less than 100 μA is halted, output  
voltage may increase. If the increase of the output voltage should be avoided, pull  
down the VOUT pin to the VSS level as soon as ON/OFF pin goes to the shutdown level.  
Logic Type  
ON/OFF Pin  
Internal  
Circuits  
VOUT Pin Voltage  
Current  
Consumption  
B
B
“L”: Power  
off  
Stopped  
VSS level  
ISS2  
ISS1  
“H”: Power  
on  
on Operating  
Set value  
Figure 9  
12  
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HM53XX  
4. Short-circuit protection  
Installation of the short-circuit protection which protects the output transistor  
against short-circuit between VOUT and VSS can be selected in the HM53XX series.  
The short-circuit protection controls output current as shown in the typical  
characteristics, (1) OUTPUT VOLTAGE versus OUTPUT CURRENT, and suppresses output  
current at about 40 mA even if VOUT and VSS pins are short-circuited.  
The short-circuit protection can not at the same time be a thermal protection.  
Attention should be paid to the Input voltage and the load current under the actual  
condition so as not to exceed the power dissipation of the package including the  
case for short-circuit.  
When the output current is large and the difference between input and output  
voltage is large even if not shorted, the short-circuit protection may work and the  
output current is suppressed to the specified value. Products without short-circuit  
protection can provide comparatively large current by removing a short-circuit  
protection.  
13  
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HM53XX  
■ Selection of External Components  
Output Capacitor (CL)  
The HM53XX series can provide stable operation without output capacitor (CL) since  
the regulator has an internal phase compensation circuit to stabilize operation  
when the load changes. The transient response of the regulator, however, changes  
with the output capacitor and the magnitude of overshoot and undershoot on output  
voltage accordingly changes. Please refer to CL dependence data in “Transient  
Response Characteristics” to select suitable value for the capacitor.  
When a tantalum or an aluminum electrolytic capacitor is used, the ESR of the  
capacitor shall be 10Ω or less. When an aluminum electrolytic capacitor is used  
attention should be especially paid to since the ESR of the aluminum electrolytic  
capacitor increases at low temperature and possibility of oscillation becomes large.  
Sufficient evaluation including temperature characteristics is indispensable.  
Precautions:  
·Design wiring patterns for VIN, VOUT and GND pins to hold low impedance.  
When mounting an output capacitor between the VOUT and VSS pins (CL) and a  
capacitor for stabilizing the input between VIN and VSS pins (CIN), the distance from  
the capacitor to the VOUT pin and to the VSS pin should be as short as possible.  
·Note that output voltage may be increased at low load current of less than 1 uA.  
·To prevent oscillation, it is recommended to use the external parts under the  
following conditions.  
Equivalent Series Resistance (ESR): 30Ωor less  
Input series resistance (RIN): 10Ωor less  
·A voltage regulator may oscillate when power source impedance is high and input  
capacitor is low or not connected.  
·The application condition for input voltage and load current should not exceed the  
package power dissipation.  
·Pay attention to the operating conditions for input/output voltage and load current so  
that the power loss in the IC does not exceed the power dissipation of the package.  
·Do not apply an electrostatic discharge to this IC that exceeds the performance  
ratings of the built-in electrostatic protection circuit.  
·SII claims no responsibility for any and all disputes arising out of or in connection  
with any infringement of the products including this IC upon patents owned by a third  
party.  
14  
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HM53XX  
Application Circuits  
Basic Circuits  
High Output Current Positive Voltage Regulator  
Short-Circuit Protection by Tr1  
Circuit for Increasing Output Voltage  
V
OUT=V XX (1+R2/R1)+IssXR2  
15  
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HM53XX  
Circuit for Increasing Output Voltage  
VOUT=VXX+VD1  
Constant Current Regulator  
IOUT=Vxx/RA+Iss  
Dual Supply  
V8.6.30  
16  
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