ACUTECH AQ431LBY-C3-12-TRL 1.24v shunt ref/amplifier to-92, sot23, sc70 package Datasheet

AQ431L
1.24V Shunt Ref/Amplifier
TO-92, SOT23, SC70 Package
Product Specification
Revision 1.5
General Description
November 15, 2005
Applications
The AQ431L is a low voltage reference/
amplifier suited for the control loop of low
voltage power supplies. Functionally similar
to the ubiquitous TL431, the AQ431L has a
lower 1.24V reference and a much wider
range of operating currents. Particular care
was taken in the design to minimize
overshoot at startup and to allow wide AC
bandwidth.
• Power supply control loop
• Low TC low voltage reference
• Power management applications
Features
•
•
•
•
Low voltage reference: 1.24V
40 uA to 100 mA operation
Low TC voltage reference
Improved AC, DC performance
compared to TLV431, 432 part types
• Offered in ultra small SC70 package
• RoHS compliant
Pin Configuration
Pin Descriptions
Pin Name
CATH
REF
ANODE
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Function
Output and supply terminal, must be greater than 1.2V for normal operation
Input, nominally 1.24V in normal operation.
Ground and Substrate
AQ431L
AQ431L
Acutechnology Semiconductor Inc.
Ordering Information
VOUT
Wrap
Ordering Number
TO-92-3
1.24V
T&R
AQ431LBY-N3-12-TRL
0.5
SOT-23-3
1.24V
T&R
AQ431LBZ-N3-12-TRL
1.0
0.5
1.0
SOT-23-3
SOT-23-3
SC70-3
1.24V
1.24V
1.24V
T&R
T&R
T&R
AQ431LBYM3-12-TRL
AQ431LBZM3-12-TRL
AQ431LBY-C3-12-TRL
1.24V
T&R
AQ431LBZ-C3-12-TRL
Device
Operating Tj
%Tol
AQ431L
-40C˚ ≤ 105C˚
1.0
AQ431L
-40C˚ ≤ 105C˚
AQ431L
AQ431L
AQ431L
-40C˚ ≤ 105C˚
-40C˚ ≤ 105C˚
-40C˚ ≤ 105C˚
PKG Type
AQ431L
-40C˚ ≤ 105C˚
0.5
SC70-3
Note: The TRL 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
3
mA
CATH, ANODE Currents
150
mA
Operating Junction Temperature
150
ºC
Lead Temperature (soldering 10 seconds)
260
ºC
-65 to +150
ºC
Storage Temperature Range
Electrical Specifications
Electrical characteristics are guaranteed over the full temperature range –40ºC <Tj<105ºC 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
25ºC;
VREF=VCATH;
ICATH =10mA
0.5% option
1.234
1.240
1.246
V
1.0% option
1.228
1.240
1.252
V
VREF Temperature deviation
–40ºC <Tj<105ºC.
4
12
mV
Ratio of VREF Change to VCATH
Change (Line Reg; 1/gain)
ICATH=10mA,
VCATH = VREF to 6V
0.3
1
mV/V
Reference input current
ICATH=10mA
0.2
0.4
µA
∆IREF
IREF Temperature Deviation
0.04
0.2
µA
ICATH(min)
Minimum Cathode Current
18
40
µA
ICATH(OFF)
Off-State Cathode Current
VREF=0V; VCATH=16V
100
nA
Dynamic Output Impedance
ICATH=0.1 to 100mAf ≤ 1.0 kHz
0.4
Ω
rCATH
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2
0.3
Rev. 1.5
November 15, 2005
AQ431L
Acutechnology Semiconductor Inc.
Typical Performance Characteristics
Reference voltage
vs
Junction temperature
Reference input current vs junction
tem perature
250
Reference input current (nA)
1.246
Reference voltage (V)
1.244
1.242
1.24
1.238
1.236
1.234
0
25 50 75 100 125 150
Junction temperature (degrees C)
220
210
200
190
180
170
160
0
25 50 75 100 125 150
Junction tem perature (degrees C)
Cathode current vs Cathode voltage
Cathode current vs Cathode voltage
150
50
100
40
Cathode current (uA)
Cathode current (mA)
230
150
-50 -25
1.232
-50 -25
240
50
0
-50
30
20
10
0
-10
-100
-1
-0.5
0
0.5
1
0
1.5
1
1.5
Cathode voltage (V)
Cathode voltage (V)
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0.5
3
Rev. 1.5
November 15, 2005
AQ431L
Acutechnology Semiconductor Inc.
Typical Performance Characteristics (contd.)
Delta Reference voltage per delta cathode
voltage vs junction temperature
Delta reference voltage per delta cathode
voltage (mV/V)
Off-state cathode current vs Junction
temperature
Off-state cathode current (nA)
80
70
60
50
40
30
20
10
0
-50 -25
0
0
-0.02
-0.04
-0.06
-0.08
-0.1
-0.12
-0.14
-0.16
-0.18
25 50 75 100 125 150
-50 -25
Junction temperature (degrees C)
50
75 100 125 150
Dynamic impedance vs frequency
100
100
80
Dynamic impedance (0hms)
Open loop voltage gain (dB)
25
Junction temperature (degrees C)
Open lop voltage gain vs frequency
60
40
20
0
-20
0.001
0
10
1
0.1
0.01
0.1
1
10
100
0.1
1000
10
100
1000
10000
Frequency (KHz)
Frequency (KHz)
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Rev. 1.5
November 15, 2005
AQ431L
Acutechnology Semiconductor Inc.
Package Dimensions
SOT23-3, SOT23-4, SOT23-5, SOT23-6
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Rev. 1.5
November 15, 2005
AQ431L
Acutechnology Semiconductor Inc.
Package Dimensions
TO92-2, TO92-3
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Rev. 1.5
November 15, 2005
AQ431L
Acutechnology Semiconductor Inc.
Package Dimensions
SC70-3, SC70-4, SC70-5, SC70-6
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. 1.5
November 15, 2005
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