ACUTECH AQ431REX-N3-25-TRL 2.5v shunt ref/amplifier to-92 and sot23 package Datasheet

AQ431R
2.5V Shunt Ref/Amplifier
TO-92 and SOT23 Package
Preliminary Specification
Revision 1.6
June 15, 2007
General Description
Applications
The AQ431R is a three-terminal adjustable
shunt regulator based on a highly stable
bandgap reference and is an excellent
replacement for standard TL431 references
when used as a secondary feedback element
in Switch Mode Power Supplies.
• Power supply control loop
• Low TC voltage reference
• Power management applications
The AQ431R meets all of the requirements of
the standard 431 specifications that are
needed to monitor the secondary output
voltage and provide the feedback signal to
the primary through an opto-coupler. It is
offered in both the very popular SOT23-3 and
TO-92 packages.
• Programmable precise output voltage
Features
•
•
•
•
•
2.5V to 15V
Wide temp range: -40º to 85ºC standard
Improved stability with capacitive loads
Low TC voltage reference
Wide range of package options
RoHS compliant
Pin Configuration
Pin Descriptions
Pin Name
CATH
REF
ANODE
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Function
Output and supply terminal, must be greater than 2.5V for normal operation
Input, nominally 2.495V in normal operation.
Ground and Substrate
AQ431R
AQ431R
Acutechnology Semiconductor Inc.
Ordering Information
Device
Operating Tj
%Tol
AQ431R
-40C˚ ≤ 85C˚
1.5
AQ431R
-40C˚ ≤ 85C˚
1.5
VOUT
Wrap
Ordering Number
TO-92-3
2.5V
BULK
AQ431REX-N3-25-BUL
TO-92-3
2.5V
T&R
AQ431REX-N3-25-TRL
2.5V
T&R
AQ431REX-M3-25-TRL
PKG Type
AQ431R
-40C˚ ≤ 85C˚
1.5
SOT-23-3
Note: All parts are Lead Free and RoHS compliant.
Absolute Maximum Ratings
Stress greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. These stress ratings only, and functional operation of the device at these or any conditions beyond
those indicated under recommended Operating Conditions is not implied. Exposure to “Absolute Maximum
Rating” for extended periods may affect device reliability. Use of standard ESD handling precautions is
required.
Parameter
Value
Units
CATH Voltage
18
V
REF Current
10
mA
CATH, ANODE Currents
100
mA
Operating Junction Temperature
150
ºC
Lead Temperature (soldering 10 seconds)
260
ºC
-65 to +150
ºC
3
KV
Storage Temperature Range
ESD Rating (HBM)
Electrical Specifications
Electrical characteristics are guaranteed over the full temperature range –40ºC <Tj<85ºC unless otherwise
stated. Ambient temperature must be de-rated based upon power dissipation and package thermal
characteristics.
Symbol
VREF
∆VREF
∆VREF
∆VCATH
IREF
Parameter
Conditions
Min
Typ
Max
Units
Reference Voltage
VREF Temperature deviation
25ºC; VREF=VCATH; ICATH =10mA
–40ºC <Tj<85ºC.
2.458
2.495
8
2.532
25
V
mV
Ratio of VREF Change to VCATH
Change (Line Reg; 1/gain)
ICATH=10mA,
VCATH = VREF to 15V
-1
-2.7
mV/V
Reference input current
ICATH=10mA
0.7
4
µA
∆IREF
IREF Temperature Deviation
0.04
0.2
µA
ICATH(min)
Minimum Cathode Current
.5
1
mA
ICATH(OFF)
Off-State Cathode Current
VREF=0V; VCATH=15V
.05
1
µA
Dynamic Output Impedance
ICATH=0.1 to 100mA f ≤ 1.0 kHz
0.2
0.5
Ω
rCATH
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Rev. 1.6 June 15, 2007
AQ431R
Acutechnology Semiconductor Inc.
Typical Performance Characteristics
Reference voltage
vs
Junction temperature
Reference input current vs junction
temperature
800
Reference input current (nA)
Reference voltage (V)
2.505
2.5
2.495
2.49
2.485
2.48
700
600
500
400
300
200
-50 -25
0
25
50
75 100 125 150
-50 -25
Junction temperature (degrees C)
0
25
50
75
100 125 150
Junction temperature (degrees C)
Cathode current vs Cathode voltage
60
Cathode current (mA)
40
20
0
-20
-40
-60
-80
-100
-1
0
1
2
3
Cathode voltage (V)
Typical Performance Characteristics (contd.)
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Rev. 1.6 June 15, 2007
AQ431R
Acutechnology Semiconductor Inc.
Off-state cathode current vs Junction
temperature
Delta Reference voltage per delta cathode
voltage vs junction temperature
-0.5
Delta reference voltage per delta
cathode voltage (mV/V)
Off-state cathode current (nA)
60
50
40
30
20
10
0
-0.6
-0.7
-0.8
-0.9
-1
-1.1
-1.2
-1.3
-50 -25
0
25
50
75 100 125 150
-50 -25
Junction temperature (degrees C)
0
25
50
75 100 125 150
Junction temperature (degrees C)
Dynamic impedance vs frequency
Open loop voltage gain vs frequency
10
70
Dynamic impedance (0hms)
Open loop voltage gain (dB)
60
50
40
30
20
10
1
0
-10
0.1
0.1
1
10
100
1000
10000
0.1
Frequency (KHz)
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1
10
100
1000
10000
Frequency (KHz)
4
Rev. 1.6 June 15, 2007
AQ431R
Acutechnology Semiconductor Inc.
Package Dimensions
SOT23-3, SOT23-4, SOT23-5, SOT23-6
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Rev. 1.6 June 15, 2007
AQ431R
Acutechnology Semiconductor Inc.
Package Dimensions
TO92-2, TO92-3
Contact Information
Acutechnology Semiconductor Inc.
3487 McKee Rd. Suite 52
San Jose CA , USA 95127
TEL: (408) 259-2300
FAX: (408) 259-9160
website: www.acutechnology.com
Disclaimer
The information furnished by Acutechnology in this data sheet is believed to be accurate and reliable. However,
Acutechnology assumes no responsibility for its use. Acutechnology reserves the right to change circuitry and specifications
at any time without notification to the customer.
Life Support Policy
Acutechnology Products are not designed or authorized for use as components in life support devices or systems where
malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are
devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to
perform can be reasonably expected to result in a significant injury to the user.
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Rev. 1.6 June 15, 2007
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