HT73xx-3
30V, 250mA TinyPowerTM LDO
Features
General Description
• Low power consumption
The HT73xx-3 device series are low power high
voltage regulators implemented in CMOS technology
which have the advantages of low voltage drop and
low quiescent current. They allow input voltages as
high as 30V. They are available with several fixed
output voltages ranging from 2.1V to 5.0V. The softstart function inhibits the problem of output overshoot
during power on.
• Low voltage drop
• Low temperature coefficient
• High input voltage - up to 30V
• Output voltage accuracy: tolerance ±2%
• Over current protection
• Package types: 3-pin TO92, 3-pin SOT89 and
8-pin SOP-EP
Although designed primarily as fixed voltage
regulators, these devices can be used with external
components to obtain variable voltages and currents.
Applications
• Battery-powered equipment
• Communication equipment
• Audio/Video equipment
Selection Table
Part No.
Output Voltage
HT7321-3
2.1V
HT7323-3
2.3V
HT7325-3
2.5V
HT7327-3
2.7V
HT7330-3
3.0V
HT7333-3
3.3V
HT7336-3
3.6V
HT7340-3
4.0V
HT7344-3
4.4V
HT7350-3
5.0V
Package
Marking
TO92
SOT89
8SOP-EP
73xx-3 (for TO92, SOT89)
HT73xx-3 (for 8SOP-EP)
Note: ″xx″ stands for output voltages.
Rev. 1.10
1
August 06, 2018
HT73xx-3
Block Diagram
VIN
OUT
Vref
Soft Start
GND
Pin Assignment
SOT89
TO92
73xx-3
73xx-3
1
2
3
GND
VIN
OUT
OUT
1
NC
2
NC
3
NC
4
9
VIN
8
VIN
7
NC
6
NC
5
GND
HT73xx-3
8 SOP-EP-A
1 2 3
GND VIN VOUT
Pin Descriptions
Pin No.
TO92
SOT89
1
1
2
2
3
3
—
—
Rev. 1.10
Pin Name
Pin Description
5
GND
Ground pin
8, 9
VIN
Input pin
1
OUT
Output pin
2, 3, 4, 6, 7
NC
No connection
8SOP-EP
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August 06, 2018
HT73xx-3
Absolute Maximum Ratings
Parameter
Value
Unit
VIN
-0.3 to +33
Operating Temperature Range, Ta
-40 to +85
o
C
+150
o
C
-65 to +165
o
C
Maximum Junction Temperature, TJ(MAX)
Storage Temperature Range
Junction-to-Ambient Thermal Resistance, θJA
Power Dissipation, PD(MAX)
V
TO92
200
°C/W
SOT89
200
°C/W
8SOP-EP
125
°C/W
TO92
0.50
W
SOT89
0.50
W
8SOP-EP
0.80
W
Value
Unit
VOUT+2 to 30
V
Note: PD(MAX) is measured at Ta = 25°C
Recommended Operating Range
Parameter
VIN
Electrical Characteristics
Symbol
VIN=(VOUT+2V), Ta=+25oC and CIN=COUT=10μF, unless otherwise specified
Test Conditions
Min.
Typ.
Max.
Unit
VIN
Input Voltage
Parameter
—
—
—
30
V
VOUT
Output Voltage Range
—
2.1
—
5.0
V
VO
Output Voltage Accuracy
–2
—
2
%
IOUT
Output Current
—
250
—
—
mA
∆VOUT
Load Regulation
1mA ≤ IOUT ≤ 100mA
—
45
90
mV
IOUT=1mA, VOUT Change=2% (Note)
—
6
15
IOUT=30mA, VOUT Change=2% (Note)
—
120
300
VDIF
Dropout Voltage
ISS
Quiescent Current
IOUT=10mA
mV
IOUT=0mA
—
1.0
1.5
uA
∆VOUT
Line Regulation
∆VIN × VOUT
(VOUT+2V) ≤ VIN ≤ 30V, IOUT=40mA
—
0.2
0.4
%/V
∆VOUT
Temperature Coefficient
∆Ta × VOUT
IOUT=40mA, -40°C < Ta < 85°C
—
±100
—
ppm/°C
IOCP
VIN=12V
—
350
700
mA
Over Current Protection
Note: Dropout voltage is defined as the input voltage minus the output voltage that produces a 2% change in the
output voltage from the value at VIN=VOUT+2V with a fixed load.
Rev. 1.10
3
August 06, 2018
HT73xx-3
Typical Performance Characteristic
Test Condition: VIN=VOUT+2V, IOUT=10mA, CIN=10μF, COUT=10μF and Ta=25ºC, unless otherwise noted
3.31
5.02
VOUT(V)
3.3
VOUT(V)
5.04
-40°C
+25°C
+85°C
3.32
3.29
5
4.98
3.28
4.96
3.27
4.94
-40°C
+25°C
+85°C
4.92
3.26
4
7
10
13
16
19
22
25
28
5
31
8
11
14
17
Line Regulation: HT7333-3 (IOUT=10mA)
2.5
1
1
0
7
10
13
16
19
22
25
28
-40°C
+25°C
+85°C
0
31
5
VIN(V)
10
200
200
160
160
120
120
80
-40°C
+25°C
+85°C
40
100
150
200
VIN(V)
20
25
80
30
-40°C
+25°C
+85°C
40
0
50
15
ISS vs VIN: HT7350-3 (IOUT=0mA)
ISS(uA)
ISS(uA)
ISS vs VIN: HT7333-3 (IOUT=0mA)
0
32
1.5
0.5
4
29
2
0.5
0
250
0
50
100
IOUT(mA)
150
200
250
IOUT(mA)
ISS vs IOUT: HT7333-3 (VIN=5.3V)
ISS vs IOUT: HT7350-3 (VIN=7.0V)
1000
1400
-40°C
+25°C
+85°C
1000
800
-40°C
+25°C
+85°C
800
VDIF(V)
1200
VDIF(mV)
26
2.5
ISS (uA)
ISS (uA)
1.5
23
Line Regulation: HT7350-3 (IOUT=10mA)
-40°C
+25°C
+85°C
2
20
VIN(V)
VIN(V)
600
400
600
400
200
200
0
0
50
100
150
200
0
250
0
IOUT(mA)
100
150
200
250
IOUT(mA)
Dropout Voltage: HT7333-3
Rev. 1.10
50
Dropout Voltage: HT7350-3
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HT73xx-3
Test Condition: VIN=VOUT+2V, IOUT=10mA, CIN=10μF, COUT=10μF and Ta=25ºC, unless otherwise noted
Load Transient Response:
HT7333-3 (VIN=5.3V, IOUT=0mA to 40mA)
Load Transient Response:
HT7350-3 (VIN=7.0V, IOUT=0mA to 40mA)
Load Transient Response:
HT7333-3 (VIN=5.3V, IOUT=40mA to 0mA)
Load Transient Response:
HT7350-3 (VIN=7.0V, IOUT=40mA to 0mA)
Line Trasient Response:
HT7333-3 (IOUT=10mA)
Line Trasient Response:
HT7350-3 (IOUT=10mA)
Rev. 1.10
5
August 06, 2018
HT73xx-3
Test Condition: VIN=VOUT+2V, IOUT=10mA, CIN=10μF, COUT=10μF and Ta=25ºC, unless otherwise noted
Rev. 1.10
Line Trasient Response:
HT7333-3 (IOUT=10mA)
Line Trasient Response:
HT7350-3 (IOUT=10mA)
Line Trasient Response:
HT7333-3 (IOUT=10mA)
Line Trasient Response:
HT7350-3 (IOUT=10mA)
Line Trasient Response:
HT7333-3 (IOUT=10mA)
Line Trasient Response:
HT7350-3 (IOUT=10mA)
Power On Response:
HT7333-3 (IOUT=0mA, TRISE=0.1ms)
Power On Response:
HT7350-3 (IOUT=0mA, TRISE=0.1ms)
6
August 06, 2018
HT73xx-3
Test Condition: VIN=VOUT+2V, IOUT=10mA, CIN=10μF, COUT=10μF and Ta=25ºC, unless otherwise noted
Power On Response:
HT7333-3 (IOUT=0mA, TRISE=100ms)
Power On Response:
HT7350-3 (IOUT=0mA, TRISE=100ms)
Power On Response:
HT7333-3 (IOUT=250mA, TRISE=0.1ms)
Power On Response:
HT7350-3 (IOUT=250mA, TRISE=0.1ms)
Power On Response:
HT7333-3 (IOUT=250mA, TRISE=100ms)
Power On Response:
HT7350-3 (IOUT=250mA, TRISE=100ms)
Power Off Response:
HT7333-3 (IOUT=0mA, TFALL=0.1ms)
Power Off Response:
HT7350-3 (IOUT=0mA, TFALL=0.1ms)
Rev. 1.10
7
August 06, 2018
HT73xx-3
Test Condition: VIN=VOUT+2V, IOUT=10mA, CIN=10uF, COUT=10uF and Ta=25ºC, unless otherwise noted
Power Off Response:
HT7333-3 (IOUT=0mA, TFALL=100ms)
Power Off Response:
HT7350-3 (IOUT=0mA, TFALL=100ms)
Power Off Response:
HT7333-3 (IOUT=250mA, TFALL=0.1ms)
Power Off Response:
HT7350-3 (IOUT=250mA, TFALL=0.1ms)
Power Off Response:
HT7333-3 (IOUT=250mA, TFALL=100ms)
Power Off Response:
HT7350-3 (IOUT=250mA, TFALL=100ms)
Rev. 1.10
8
August 06, 2018
HT73xx-3
Application Information
Power Dissipation Calculation
The devices are 3-terminal low dropout series linear
voltage regulators. It is important the following
application points are noted if correct operation is to
be achieved.
In order to keep the device within its operating limits
and to maintain a regulated output voltage, the power
dissipation of the device, given by P D, must not
exceed the Maximum Power Dissipation, given by
PD(MAX). Therefore PD ≤ PD(MAX). From the diagram it
can be seen that almost all of this power is generated
across the pass transistor which is acting like a
variable resistor in series with the load to keep the
output voltage constant. This generated power which
will appear as heat, must never allow the device to
exceed its maximum junction temperature.
External Circuit
It is important that external capacitors are connected
to both the input and output pins. For the input pin
suitable bypass capacitors as shown in the application
circuits should be connected especially in situations
where a battery power source is used which may have
a higher impedence. For the output pin, a suitable
capacitor should also be connected especially in
situations where the load is of a transient nature, in
which case larger capacitor values should be selected
to limit any output transient voltages.
Common
The maximum power dissipation depends on the
thermal resistance of the IC package, the PCB layout,
the rate of the surrounding airflow and the difference
between the junction and ambient temperature. The
maximum power dissipation can be calculated by the
following formula:
PD(MAX) = (TJ(MAX) – Ta) / θJA
θJA Value °C/W
200 °C/W
SOT89
200 °C/W
8SOP-EP
125 °C/W
Maximum Power Dissipation (W)
Time
As the quiescent current of the device is very small it
can generally be ignored and as a result the input current can be assumed to be equal to the output current.
Therefore the power dissipation of the device, PD, can
be calculated as the voltage drop across the input and
output multiplied by the current, given by the equation,
PD = (VIN – VOUT) × IIN. As the input current is also
equal to the load current the power dissipation PD =
(VIN – VOUT) × ILOAD. However, with transient load currents, PD = (VIN – VOUT) × ILOAD(AVG) as shown in the
figure.
8SOP-EP
0.5W
0.6
0.4
SOT89, TO92
0.2
0
0
Rev. 1.10
25
50
75
100
Ambient Temperature (oC)
Common
ILOAD(AVG)
0.8W
0.8
ILOAD
ILOAD
For maximum operating rating conditions, the
maximum junction temperature is 150°C. However,
it is recommended that the maximum junction
temperature does not exceed 125°C during normal
operation to maintain an adequate margin for device
reliability. The derating curves of different packages
for maximum power dissipation are as follows:
1.0
Vref
Vfb
VOUT
In practical applications the regulator may be called
upon to provide both steady state and transient
currents due to the transient nature of the load.
Although the device may be working well within its
limits with its steady state current, care must be taken
with transient loads which may cause the current to
rise close to its maximum current value. Care must
be taken with transient loads and currents as this will
result in device junction temperature rises which must
not exceed the maximum junction temperature. With
both steady state and transient currents, the important
current to consider is the average or more precisely
the RMS current which is the value of current that will
appear as heat generated in the device. The following
diagram shows how the average current relates to the
transient currents.
where TJ(MAX) is the maximum junction temperature,
Ta is the ambient temperature and θJA is the junctionto-ambient thermal resistance of the IC package in
degrees per watt. The following table shows the θJA
values for various package types.
TO92
OUT
VIN
GND
Thermal Considerations
Package
IIN
VIN
125
150
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August 06, 2018
HT73xx-3
Application Circuits
Basic Circuits
VIN
VIN
VOUT
HT73xx-3
Series
C3
C1
0.1uF
10uF
GND
VOUT
C2
C4
10uF
0.1uF
Common
Common
High Output Current Positive Voltage Regulator
TR1
R1
VIN
VIN
VOUT
HT73xx-3
Series
C3
C1
0.1uF
10uF
GND
VOUT
C2
C4
10uF
0.1uF
Common
Common
Circuit for Increasing Output Voltage
VIN
VIN
C1
0.1uF
10uF
GND
ISS
VOUT = Vxx×(1+R2/R1) + ISS×R2
Common
Rev. 1.10
VOUT
C2
10uF
C4
0.1uF
Vxx
C3
VOUT
HT73xx-3
Series
R1
R2
Common
10
August 06, 2018
HT73xx-3
Circuit for Increasing Output Voltage
VIN
VIN
VOUT
HT73xx-3
Series
C1
0.1uF
10uF
GND
ISS
C2
C4
10uF
0.1uF
R1
Vxx
C3
VOUT
D1
VOUT = Vxx + VD1
Common
Common
Constant Current Regulator
VIN
VIN
C1
0.1uF
10uF
GND
ISS
VOUT
C2
C4
10uF
0.1uF
RA
Vxx
C3
VOUT
HT73xx-3
Series
IOUT
IOUT = Vxx / RA + ISS
RL
Common
Common
Dual Supply
VOUT
VIN
VIN
HT73xx-3
Series
C5
10uF
GND
VOUT
VIN
C3
0.1uF
C1
10uF
HT73xx-3
Series
GND
Common
Rev. 1.10
VOUT
C6
0.1uF
D1
VOUT
C2
C4
10uF
0.1uF
R1
Common
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HT73xx-3
Package Information
Note that the package information provided here is for consultation purposes only. As this information may be
updated at regular intervals users are reminded to consult the Holtek website for the latest version of the Package/
Carton Information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be
transferred to the relevant website page.
• Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
• The Operation Instruction of Packing Materials
• Carton information
Rev. 1.10
12
August 06, 2018
HT73xx-3
3-pin TO92 Outline Dimensions
Symbol
Nom.
Max.
A
0.173
0.180
0.205
B
0.170
—
0.210
C
0.500
0.580
—
D
—
0.015 BSC
—
E
—
0.010 BSC
—
F
—
0.050 BSC
—
G
—
0.035 BSC
—
H
0.125
0.142
0.165
Symbol
Rev. 1.10
Dimensions in inch
Min.
Dimensions in mm
Min.
Nom.
Max.
A
4.39
4.57
5.21
B
4.32
—
5.33
C
12.70
14.73
—
D
—
0.38 BSC
—
E
—
2.54 BSC
—
F
—
1.27 BSC
—
G
—
0.89 BSC
—
H
3.18
3.61
4.19
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HT73xx-3
3-pin SOT89 Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.173
—
0.185
B
0.053
—
0.072
C
0.090
—
0.106
D
0.031
—
0.047
E
0.155
—
0.173
F
0.014
—
0.019
G
0.017
—
0.022
H
—
0.059 BSC
—
I
0.055
—
0.063
J
0.014
—
0.017
Symbol
Rev. 1.10
Dimensions in mm
Min.
Nom.
Max.
A
4.40
—
4.70
B
1.35
—
1.83
C
2.29
—
2.70
D
0.80
—
1.20
E
3.94
—
4.40
F
0.36
—
0.48
G
0.44
—
0.56
H
—
1.50 BSC
—
I
1.40
—
1.60
J
0.35
—
0.44
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August 06, 2018
HT73xx-3
8-pin SOP-EP (150mil) Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
Max.
—
A
—
0.236 BSC
B
—
0.154 BSC
—
C
0.012
—
0.020
C’
—
0.193 BSC
—
D
—
—
0.069
D1
0.059
—
—
—
E
—
0.050 BSC
E2
0.039
—
—
F
0.004
—
0.010
G
0.016
—
0.050
H
0.004
—
0.010
a
0°
—
8°
Symbol
Rev. 1.10
Dimensions in mm
Min.
Nom.
Max.
A
—
6.00 BSC
—
B
—
3.90 BSC
—
C
0.31
—
0.51
C’
—
4.90 BSC
—
D
—
—
1.75
D1
1.50
—
—
E
—
1.27 BSC
—
E2
1.00
—
—
F
0.10
—
0.25
G
0.40
—
1.27
H
0.10
—
0.25
a
0°
—
8°
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August 06, 2018
HT73xx-3
Copyright© 2018 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time
of publication. However, Holtek assumes no responsibility arising from the use of
the specifications described. The applications mentioned herein are used solely
for the purpose of illustration and Holtek makes no warranty or representation that
such applications will be suitable without further modification, nor recommends
the use of its products for application that may present a risk to human life due to
malfunction or otherwise. Holtek's products are not authorized for use as critical
components in life support devices or systems. Holtek reserves the right to alter
its products without prior notification. For the most up-to-date information, please
visit our web site at http://www.holtek.com.tw.
Rev. 1.10
16
August 06, 2018