HT73xx Series
Low Power Consumption LDO
Features
General Description
• Ultra low quiescent current: 3.5µA (typ.)
The HT73XX series is a set of three-terminal, low
power, high voltage regulators implemented in
CMOS technology. The series features extremely
low quiescent current which is typically 3.5µA .
They allow input voltages as high as 12V. The device
provides large current with a significantly small
dropout voltage.
• High input voltage (up to 12V)
• Output voltage: 1.8V, 2.5V, 2.7V, 3.0V, 3.3V, 3.5V,
4.15V, 5.0V
• Output voltage accuracy: tolerance ±3%
• Maximum output current: 250mA
• Low dropout voltage
The HT73XX consists of a high-precision voltage
reference, an error correction circuit, and a current
limited output driver. They are available with several
fixed output voltages ranging from 1.8V to 5.0V.
CMOS technology ensures low dropout voltage
and low current consumption. Although designed
primarily as fixed voltage regulators, these devices
can be used with external components to generate
variable voltages and currents.
• Low temperature coefficient
• TO-92, SOT-89 package
Applications
• Battery-powered equipment
• Voltage regulator for microprocessor
• Voltage regulator for LAN cards
• Wireless Communication equipment
• Audio/Video equipment
Selection Table
Part No.
Output Voltage
HT7318
1.8V
HT7325
2.5V
HT7327
2.7V
HT7330
3.0V
HT7333
3.3V
HT7335
3.5V
HT7341
4.15V
HT7350
5.0V
Package
SOT89
TO92
Marking
73xx-A (for TO-92)
73xx-A (for SOT-89)
Note: ″xx″ stands for output voltages.
Rev. 1.50
1
June 25, 2016
HT73xx
Block Diagram
Pin Assignment
Pin Description
Pin No.
Pin Name
SOT89
TO92
1
1
2
2
VIN
3
3
VOUT
GND
Description
Ground pin
Input pin
Output pin
Absolute Maximum Ratings*
Supply Voltage .......................... VSS−0.3V to VSS+14V
Operating Temperature .........................−40°C to 85°C
Storage Temperature ...........................−50°C to 125°C
Power Consumption (*2)..................................500mW
Power Consumption (*1)................................. 500mW
Note: These are stress ratings only. Stresses exceeding the range specified under ″Absolute Maximum Ratings″
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability.
*1: applied to TO-92
*2: applied to SOT-89
The guaranteed specifications apply only for the test conditions listed.
Rev. 1.50
2
June 25, 2016
HT73xx
Electrical Characteristics
HT7318, +1.8V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
2.8V IOUT=40mA
IOUT(MAX)
Maximum Output Current
2.8V VOUT ≥ 1.62V
∆VOUT*
Load Regulation
2.8V 1mA ≤ IOUT ≤ 60mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
IOUT=40mA
2.8V No load
Line Regulation
—
IOUT=40mA
2.8V ≤ VIN ≤ 12V
Input Voltage
—
—
Temperature Coefficient
—
IOUT=40mA
2.8V
−40°C < Ta < 85°C
Min.
Typ.
Max.
Unit
1.746
1.800
1.854
V
150
—
—
mA
—
45
90
mV
—
170
—
mV
—
3.5
7
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
HT7325, +2.5V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
3.5V IOUT=40mA
IOUT(MAX)
Maximum Output Current
3.5V VOUT ≥ 2.25V
∆VOUT*
Load Regulation
3.5V 1mA ≤ IOUT ≤ 60mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
IOUT=40mA
3.5V No load
Line Regulation
—
IOUT=40mA
3.5V ≤ VIN ≤ 12V
Input Voltage
—
—
Temperature Coefficient
—
IOUT=40mA
3.5V
−40°C < Ta < 85°C
Min.
Typ.
Max.
Unit
2.425
2.500
2.575
V
180
—
—
mA
—
45
90
mV
—
110
—
mV
—
3.5
7.0
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
HT7327, +2.7V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
3.7V IOUT=40mA
IOUT(MAX)
Maximum Output Current
3.7V VOUT ≥ 2.43V
∆VOUT*
Load Regulation
3.7V 1mA ≤ IOUT ≤ 80mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
Rev. 1.50
—
IOUT=40mA
3.7V No load
Line Regulation
—
IOUT=40mA
3.7V ≤ VIN ≤ 12V
Input Voltage
—
—
Temperature Coefficient
IOUT=40mA
3.7V
−40°C < Ta < 85°C
3
Min.
Typ.
Max.
Unit
2.619
2.700
2.781
V
200
—
—
mA
—
45
90
mV
—
100
—
mV
—
3.5
7.0
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
June 25, 2016
HT73xx
HT7330, +3.0V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
4.0V IOUT=40mA
IOUT(MAX)
Maximum Output Current
4.0V VOUT ≥ 2.70V
∆VOUT*
Load Regulation
4.0V 1mA ≤ IOUT ≤ 80mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
IOUT=40mA
4.0V No load
Line Regulation
—
IOUT=40mA
4.0V ≤ VIN ≤ 12V
Input Voltage
—
—
Temperature Coefficient
—
IOUT=40mA
4.0V
−40°C < Ta < 85°C
Min.
Typ.
Max.
Unit
2.910
3.000
3.090
V
250
—
—
mA
—
45
90
mV
—
95
—
mV
—
3.5
7.0
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
HT7333, +3.3V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
4.3V IOUT=40mA
IOUT(MAX)
Maximum Output Current
4.3V VOUT ≥ 2.97V
∆VOUT*
Load Regulation
4.3V 1mA ≤ IOUT ≤ 80mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
IOUT=40mA
4.3V No load
Line Regulation
—
IOUT=40mA
4.3V ≤ VIN ≤ 12V
Input Voltage
—
—
Temperature Coefficient
—
IOUT=40mA
4.3V
−40°C < Ta < 85°C
Min.
Typ.
Max.
Unit
3.201
3.300
3.399
V
250
—
—
mA
—
45
90
mV
—
90
—
mV
—
3.5
7.0
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
HT7335, +3.5V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
4.5V IOUT=40mA
IOUT(MAX)
Maximum Output Current
4.5V VOUT ≥ 3.15V
∆VOUT*
Load Regulation
4.5V 1mA ≤ IOUT ≤ 80mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
Rev. 1.50
—
IOUT=40mA
4.5V No load
Line Regulation
—
IOUT=40mA
4.5V ≤ VIN ≤ 12V
Input Voltage
—
—
Temperature Coefficient
IOUT=80mA
4.5V
−40°C < Ta < 85°C
4
Min.
Typ.
Max.
Unit
3.395
3.500
3.605
V
250
—
—
mA
—
45
90
mV
—
80
—
mV
—
3.5
7.0
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
June 25, 2016
HT73xx
HT7341, +4.15V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
5.15V IOUT=40mA
IOUT(MAX)
Maximum Output Current
5.15V VOUT ≥ 3.74V
∆VOUT*
Load Regulation
5.15V 1mA ≤ IOUT ≤ 80mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
—
5.15V No load
Line Regulation
—
IOUT=40mA
6.0V ≤ VIN ≤ 12.0V
Input Voltage
—
—
Temperature Coefficient
IOUT=40mA
IOUT=80mA
5.15V
−40°C < Ta < 85°C
Min.
Typ.
Max.
Unit
4.025
4.150
4.275
V
250
—
—
mA
—
45
90
mV
—
60
—
mV
—
3.5
7.0
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
HT7350, +5.0V Output Type
Ta=25°C
Symbol
Parameter
Test Conditions
VIN
Conditions
VOUT
Output Voltage
6.0V IOUT=40mA
IOUT(MAX)
Maximum Output Current
6.0V VOUT ≥ 4.50V
∆VOUT*
Load Regulation
6.0V 1mA ≤ IOUT ≤ 100mA
VDROP**
Dropout Voltage
ISS
Quiescent Current
VIN
—
IOUT=40mA
6.0V No load
Line Regulation
—
IOUT=40mA
6.0V ≤ VIN ≤ 12.0V
Input Voltage
—
—
Temperature Coefficient
IOUT=80mA
6.0V
−40°C < Ta < 85°C
Min.
Typ.
Max.
Unit
4.850
5.000
5.150
V
250
—
—
mA
—
45
90
mV
—
60
—
mV
—
3.5
7.0
µA
—
0.2
0.3
%/V
—
—
12
V
—
±0.7
—
mV/°C
Note: ″*″ Regulation is measured at constant junction temperature, using pulsed ON time.
″**″ Dropout is measured at constant junction temperature, using pulsed ON time, and the criterion is VOUT
inside target value ±2%.
Application Circuits
5
Rev. 1.50
June 25, 2016
HT73xx
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. 1.50
6
June 25, 2016
HT73xx
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. 1.50
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
7
June 25, 2016
HT73xx
3-pin SOT89 Outline Dimensions
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.173
—
0.181
B
0.053
—
0.072
C
0.090
—
0.102
D
0.035
—
0.047
E
0.155
—
0.167
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. 1.50
Dimensions in mm
Min.
Nom.
Max.
A
4.40
—
4.60
B
1.35
—
1.83
C
2.29
—
2.60
D
0.89
—
1.20
E
3.94
—
4.25
F
0.36
—
0.48
G
0.44
—
0.56
H
—
1.50 BSC
—
I
1.40
—
1.60
J
0.35
—
0.44
8
June 25, 2016
HT73xx
Copyright© 2016 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. 1.50
9
June 25, 2016
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