Holtek HT70XXA-1 Tinypowertm voltage detector Datasheet

HT70xxA-1
TinyPowerTM Voltage Detector
Features
· Low power consumption
· Output voltage accuracy: tolerance ± 3%
· Low temperature coefficient
· Built-in hysteresis characteristic
· High input voltage range (up to 24V)
· TO92, SOT89, SOT23 and SOT23-5 package
Applications
· Battery checkers
· Microcomputer reset
· Level selectors
· Battery memory backup
· Power failure detectors
· Non-volatile RAM signal storage protectors
General Description
The HT70xxA-1 series devices area set of three terminal
low power voltage detectors implemented in CMOS
technology. Each voltage detector in the series detects a
particular fixed voltage ranging from 2.2V to 5V. The
voltage detectors consist of a high-precision and low
power consumption standard voltage source as well as a
comparator, hysteresis circuit, and an output driver.
CMOS technology ensures low power consumption.
Although designed primarily as fixed voltage detectors,
these devices can be used with external components to
detect user specified threshold voltages.
Selection Table
Detectable
Voltage
Hysteresis
Width
Tolerance
HT7022A-1
2.2V
0.11V
±3%
HT7024A-1
2.4V
0.12V
±3%
HT7027A-1
2.7V
0.135V
±3%
HT7033A-1
3.3V
0.165V
±3%
HT7039A-1
3.9V
0.195V
±3%
HT7044A-1
4.4V
0.22V
±3%
HT7050A-1
5.0V
0.25V
±3%
Part No.
Note:
Package
TO92
SOT89
SOT23
SOT23-5
Marking
70xxA-1 (for TO92)
70xxA-1 (for SOT89)
70xxA-1# (for SOT89)
70xxA-1+ (for SOT89)
0xxA (for SOT23)
0xxA+ (for SOT23)
0xxA (for SOT23-5)
0xxA# (for SOT23-5)
0xxA+ (for SOT23-5)
²xx² stands for output voltages.
Both lead free and green compound devices are available. Note the symbol marks below:
²#² stands for lead free devices.
Blank and ²+² stands for green compound devices, which are Lead-free and Halogen-free.
For the TO92 package, the symbol mark will be at the end of the date code. Whereas for the SOT89, SOT23
and SOT23-5, the symbol mask will be located at the end of IC marking.
Rev. 2.00
1
April 30, 2013
HT70xxA-1
Block Diagram
N Channel Open Drain Output (Normal Open; Active Low)
V O U T
V D D
V R E F
G N D
Output Table & Curve
V
VDD
VDD>VDET(+)
VDD£VDET(-)
VOUT
Hi-Z
VSS
O U T
D a s h lin e ... V
S o lid lin e ... V
V
D E T
V
V
D E T
V
´ 1 .0 5
IN
IN
fro m L
fro m H
O
I
®
®
L
H
O
I
IN
H Y S
Pin Assignment
T O 9 2
S O T 2 3
S O T 8 9
F r o n t V ie w
7 0 x x A -1
S O T 2 3 -5
V O U T
3
N C
7 0 x x A -1
0 x x A
O U T V D D
O U T
V D D
V S S
O U T
V D D
V S S
1
V S S
S id e V ie w
Rev. 2.00
N C
2
T o p V ie w
0 x x A
2
O U T
V S S
O U T
V D D
V S S
O U T
V S S
O U T
V D D
V S S
April 30, 2013
HT70xxA-1
Absolute Maximum Ratings
Supply Voltage .............................................................................................................................VSS-0.3V to VSS+26V
Output Voltage ...........................VSS-0.3V to VDD+0.3V
Output Current......................................................50mA
Storage Temperature ............................-50°C to 125°C
Power Consumption ..........................................200mW
Operating Temperature ...........................-40°C to 85°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² 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.
Electrical Characteristics
HT7022A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.134
2.200
2.266
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
3.2V
¾
3
6
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1
¾
mA
Temperature Coefficient
¾
-40°C<Ta<85°C
¾
±1.1
¾
mV/°C
D V D
D T
E T
a
No load
¾
HT7024A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.328
2.400
2.472
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
3.4V
¾
3
6
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1
¾
mA
Temperature Coefficient
¾
-40°C<Ta<85°C
¾
±0.9
¾
mV/°C
D V D
D T
E T
a
Rev. 2.00
No load
¾
3
April 30, 2013
HT70xxA-1
HT7027A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.619
2.700
2.781
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
3.7V
¾
3
6
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1
¾
mA
Temperature Coefficient
¾
-40°C<Ta<85°C
¾
±0.9
¾
mV/°C
D V D
D T
E T
a
No load
¾
HT7033A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
3.201
3.300
3.399
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
4.3V
¾
3
6
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
VOUT=0.25V
1.2
2.5
¾
mA
-40°C<Ta<85°C
¾
±0.9
¾
mV/°C
D V D
D T
E T
a
Temperature Coefficient
No load
¾
2.5V
¾
HT7039A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
3.783
3.900
4.017
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
4.9V
¾
3
6
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
VOUT=0.25V
1.2
2.5
¾
mA
-40°C<Ta<85°C
¾
±0.9
¾
mV/°C
D V D
D T
E T
a
Rev. 2.00
Temperature Coefficient
2.5V
¾
No load
¾
4
April 30, 2013
HT70xxA-1
HT7044A-1
Ta=25°C
Symbol
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
4.268
4.400
4.532
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
5.4V
VDD
Operating Voltage
¾
IOL
Output Sink Current
D V D
D T
E T
a
Temperature Coefficient
¾
3
6
mA
1.5
¾
24
V
VOUT=0.36V
3
6
¾
mA
-40°C<Ta<85°C
¾
±0.9
¾
mV/°C
No load
¾
3.6V
¾
HT7050A-1
Ta=25°C
Symbol
VDET
VHYS
Parameter
Detection Voltage
Test Conditions
Hysteresis Width
¾
Operating Current
6.0V
Operating Voltage
¾
IOL
Output Sink Current
E T
Temperature Coefficient
Max.
Unit
¾
4.850
5.000
5.150
V
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
¾
3
6
mA
¾
2.1
¾
24
V
VOUT=0.36V
3
6
¾
mA
-40°C<Ta<85°C
¾
±0.9
¾
mV/°C
¾
IDD
a
Typ.
Conditions
VDD
D V D
D T
Min.
VDD
3.6V
¾
No load
Functional Description
The HT70xxA-1 series is a set of voltage detectors
equipped with a high stability voltage reference which is
connected to the negative input of a comparator¾
denoted as VREF in the following figure for NMOS output
voltage detector.
The hysteresis width is:
VHYS = VDET (+) - VDET (-)
The figure demonstrates the NMOS output type with
positive output polarity (VOUT is normally open, active
low). The HT70xxA-1 series also supplies options for
other output types with active high outputs. Application
circuits shown are examples of positive output polarity
(normally open, active low) unless otherwise specified.
When the voltage drop to the positive input of the
comparator (i,e,VB) is higher than VREF, VOUT goes
high, M1 turns off, and VB is expressed as VBH=VDD ´
(RB+RC) / (RA+RB+RC). If VDD is decreased so that VB
falls to a value less than VREF, the comparator output
inverts from high to low, VOUT goes low, VC is high, M1
turns on, RC is bypassed, and VB becomes: VBL= VDD ´
RB / (RA+RB), which is less than VBH. By so doing, the
comparator output will stay low to prevent the circuit
from oscillating when VB » VREF.
V
R
V
The detectable voltage is defined as:
R E F
R
V
R L
B
C
V
O U T
M N
B
R
RA + RB + RC
´ VREF
RB + RC
M 1
C
V
The release voltage is defined as:
RA + RB
VDET (+) =
´ VREF
RB
Rev. 2.00
C o m p a ra to r
V
If VDD falls below the minimum operating voltage, the
output becomes undefined. When VDD goes from low to
VDD ´ RB / (RA+RB) > VREF, the comparator output and
VOUT goes high.
VDET (-) =
A
D D
S S
NMOS Output Voltage Detector
5
April 30, 2013
HT70xxA-1
Typical Performance Characteristics
Rev. 2.00
6
April 30, 2013
HT70xxA-1
Application Circuits
Microcomputer Reset Circuit
Power-on Reset Circuit
Normally a reset circuit is required to protect the
microcomputer system from malfunctions due to power
line interruptions. The following examples show how
different output configurations perform a reset function
in various systems.
With several external components, the NMOS open
drain type of the HT70xxA-1 series can be used to
perform a power-on reset function as shown:
V
IN
R
· NMOS open drain output application for separate
D
power supply
V
V
D D 1
V
H T 7 0 x x A -1
V
D D 2
D D
V
C
O U T
R E S E T
M ic r o C o m p u te r
O U T
V
O U T
V
S S
H T 7 0 x x A -1
V
V
S S
V
D D
S S
· NMOS open drain output application with R-C delay
V
H T 7 0 x x A -1
V
R
O U T
D D
t
M ic r o C o m p u te r
V
O U T
C
V
S S
t
5V Power Line Monitoring Circuit
Generally, a minimum operating voltage of 4.5V is
guaranteed in a 5V power line system. The HT7044A-1
is recommended for use as 5V power line monitoring
circuit.
· 5V power line monitor with power-on reset
5 V P o w e r lin e
R
C
D
V
D D
V
O U T
H T 7 0 4 4 A -1
V
Rev. 2.00
7
S S
V
S S
April 30, 2013
HT70xxA-1
· with 5V voltage regulator
Malfunction Analysis
5 V V o lta g e r e g u la to r
V
5 V
H T 7 1 5 0 -1
IN
The following circuit demonstrates the way a circuit
analyzes malfunctions by monitoring the variation or
spike noise of power supply voltage.
V
G N D
V
D D
V
V
O U T
O U T
H T 7 0 x x A -1
H T 7 0 4 4 A -1
V
V
S S
V
S S
S S
Charge Monitoring Circuit
Change of Detectable Voltage
The following circuit shows a charged monitor for
protection against battery deterioration by
overcharging. When the voltage of the battery is higher
than the set detectable voltage, the transistor turns on to
bypass the charge current, protecting the battery from
overcharging.
If the required voltage is not found in the standard
product selection table, it is possible to change it by
using external resistance dividers or diodes.
· Varying the detectable voltage with a resistance di-
vider
V
D D
IN
R
R
A
V
V
V
D D
V
O U T
V
S S
S o la r
C e ll
H T 7 0 x x A -1
B
S S
T r
V
O U T
D D
V
B A T T
S S
L o a d
H T 7 0 x x A -1
RA + RB
´ VDET
RB
RA + RB
Hysteresis width =
´ VHYS
RB
Detectable voltage =
· Varying the detectable voltage with a diode
V
IN
V f1
V f2
V
D D
V
O U T
H T 7 0 x x A -1
V
V
S S
S S
Detectable Voltage = Vf1+Vf2+VDET
Rev. 2.00
8
April 30, 2013
HT70xxA-1
Level Selector
The following diagram illustrates a logic level selector.
V
D D
V
V
O U T
H T 7 0 3 9 A -1
V
V
S S
V
5 .0 V
V
D E T 1
3 .9 V
V
D E T 2
V
O U T
O U T
H T 7 0 5 0 A -1
V
D E T 2
D E T 1
D D
t
V
O U T
t
Rev. 2.00
9
April 30, 2013
HT70xxA-1
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 information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be
transferred to the relevant website page.
· Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
· Packing Meterials Information
· Carton information
· PB FREE Products
· Green Packages Products
Rev. 2.00
10
April 30, 2013
HT70xxA-1
3-pin TO92 Outline Dimensions
A
B
D
C
E
F
G
H
Symbol
Nom.
Max.
A
0.170
¾
0.200
B
0.170
¾
0.200
C
0.500
¾
¾
D
0.011
¾
0.020
E
0.090
¾
0.110
F
0.045
¾
0.055
G
0.045
¾
0.065
H
0.130
¾
0.160
a
0°
¾
10°
Symbol
Rev. 2.00
Dimensions in inch
Min.
Dimensions in mm
Min.
Nom.
Max.
A
4.32
¾
5.08
B
4.32
¾
5.08
C
12.70
¾
¾
D
0.28
¾
0.51
E
2.29
¾
2.79
F
1.14
¾
1.40
G
1.14
¾
1.65
H
3.30
¾
4.06
a
0°
¾
10°
11
April 30, 2013
HT70xxA-1
3-pin SOT89 Outline Dimensions
B
I
A
J
C
E
D
G
F
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.173
¾
0.181
B
0.059
¾
0.072
C
0.090
¾
0.102
D
0.035
¾
0.047
E
0.155
¾
0.167
F
0.014
¾
0.019
G
0.017
¾
0.022
H
¾
0.059
¾
I
55
¾
63
J
14
¾
17
Symbol
Rev. 2.00
H
Dimensions in mm
Min.
Nom.
Max.
A
4.39
¾
4.60
B
1.50
¾
1.83
C
2.29
¾
2.59
D
0.89
¾
1.19
E
3.94
¾
4.24
F
0.36
¾
0.48
G
0.43
¾
0.56
H
¾
1.50
¾
I
1.40
¾
1.60
J
0.36
¾
0.43
12
April 30, 2013
HT70xxA-1
3-pin SOT23 Outline Dimensions
D
C
H
E
e
q
A
A 2
b
Symbol
A 1
Dimensions in inch
Min.
Nom.
Max.
A
0.039
¾
0.051
A1
¾
¾
0.004
A2
0.028
¾
0.035
b
0.014
¾
0.020
C
0.004
¾
0.010
D
0.106
¾
0.122
E
0.055
¾
0.071
e
¾
0.075
¾
H
0.102
¾
0.118
L
0.015
¾
¾
q
0°
¾
9°
Symbol
Rev. 2.00
L
Dimensions in mm
Min.
Nom.
Max.
A
1.00
¾
1.30
A1
¾
¾
0.10
A2
0.70
¾
0.90
b
0.35
¾
0.50
C
0.10
¾
0.25
D
2.70
¾
3.10
E
1.40
¾
1.80
e
¾
1.90
¾
H
2.60
¾
3.00
L
0.37
¾
¾
q
0°
¾
9°
13
April 30, 2013
HT70xxA-1
5-pin SOT23-5 Outline Dimensions
D
C
H
E
e
q
A
A 2
b
Symbol
A
A 1
Dimensions in inch
Min.
Nom.
Max.
0.039
¾
0.051
A1
¾
¾
0.004
A2
0.028
¾
0.035
b
0.014
¾
0.020
C
0.004
¾
0.010
D
0.106
¾
0.122
E
0.055
¾
0.071
e
¾
0.075
¾
H
0.102
¾
0.118
L
0.015
¾
¾
q
0°
¾
9°
Symbol
Rev. 2.00
L
Dimensions in mm
Min.
Nom.
Max.
A
1.00
¾
1.30
A1
¾
¾
0.10
A2
0.70
¾
0.90
b
0.35
¾
0.50
C
0.10
¾
0.25
D
2.70
¾
3.10
E
1.40
¾
1.80
e
¾
1.90
¾
H
2.60
¾
3.0
L
0.37
¾
¾
q
0°
¾
9°
14
April 30, 2013
HT70xxA-1
Copyright Ó 2013 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. 2.00
15
April 30, 2013
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