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AQ102
Low-Voltage Ref/Amplifier
SOT23-5 and SC70-5 Package
Product Specification Revision 1.3 May 3, 2005
General Description
The AQ102 is a low voltage combined reference/amplifier suited for the control loop of low voltage power supplies. In order to allow operation down to very low voltages, the error amplifier output and the supply terminal have been isolated to separate functional pins. The nominal reference voltage is 600 mV, the COMP output can sink 20mA at 300mV. Functionally, the AQ120 can be applied similarly to industry standard TL431, except that the reference is 600 mV and this requires a separate Vcc connection to a supply above 2.2V. Additionally, the output of the AQ120 can swing close to ground. In the SC-70 package, the AQ102 is a replacement for the MAX8515 part.
Applications * Power supply control loop * Power supply supervisory functions Features * Low input voltage reference * 600mV high accuracy voltage reference * Low TC voltage reference * High PSRR and line regulation * Low current consumption * Offered in ultra small SC70-5 package * Zero offset error amplifier * Open collector output * RoHS compliant
Block Diagram
Pin Configuration
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AQ102
Acutechnology Semiconductor Inc.
AQ102
Typical Application
Pin Descriptions
Pin 1 2 3 4 5 Pin Name FB GND COMP N/C VCC Function Inverting input to error amplifier; will have threshold of 600mV. Ground Output of error amplifier; 20 mA source/sink capability Positive supply
Ordering Information
Device AQ102 AQ102
Note: The
Operating Tj -40C 105C -40C 105C
%Tol 1.0 1.0
Pkg Type SOT-23-5 SC70-5
VOUT 0.6V 0.6V
Wrap T&R T&R
Ordering Number AQ102BY-M5-06-TRL AQ102BY-C5-06-TRL
TRL parts are Lead Free and RoHS compliant. 2 Rev. 1.3 May 3, 2005
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Acutechnology Semiconductor Inc.
AQ102
Absolute Maximum Ratings
Parameter VCC Voltage COMP Voltage REF Voltage VCC, COMP, REF Current Operating Junction Temperature Lead Temperature (soldering 10 seconds) Storage Temperature Range Value 20 20 20 50 150 260 -65 to +150 Units V V V mA C C C
Electrical Specifications
Electrical characteristics are guaranteed over the full temperature range -40C www.acutechnology.com
3
Rev. 1.3
May 3, 2005
Acutechnology Semiconductor Inc.
AQ102
Typical Performance Characteristics
Line regulation (at 1mA)
0.4 Output voltage change (mV) 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 2.2 6 10 14 18 Supply voltage (V)
Output voltage change (mV) 6 5 4 3 2 1 0 1
Load regulation
5
10 Load current (mA)
15
20
Supply current vs load current 300 280 Supply current (uA) 260 240
PSRR (dB)
Power-supply rejection ratio vs frequency
-50 -55 -60 -65 -70 -75 -80 -85 -90 -95 -100 0.1 1 10 100 1000 10000 100000
220 200 180 160 140 120 100 0 5 10 15 20 Load current (m A)
Frequency (Hz)
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4
Rev. 1.3
May 3, 2005
Acutechnology Semiconductor Inc.
AQ102
Typical Performance Characteristics (contd.)
FB Bias current vs Tem perature Vcc=2.5V
630 Vref@10mA
0
Reference voltage (V)
620 610 600 590 580 570 -40 0 40 80 120 Temperature (degrees C)
-10 FB bias current (nA) -20 -30 -40 -50 -60 -70 -40 0 40 80 120
Tem perature (degrees C)
Gain vs. Frequency
110 90 70 Gain (dB) 50 30 10 -10
0.01
0.1
1
10
100
1000 10000
Frequency (KHz)
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5
Rev. 1.3
May 3, 2005
Acutechnology Semiconductor Inc.
AQ102
Package Dimensions SOT23-3, SOT23-4, SOT23-5, SOT23-6
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6
Rev. 1.3
May 3, 2005
Acutechnology Semiconductor Inc.
AQ102
Package Dimensions (contd.) SC70-3, SC70-4, SC70-5, SC70-6
Contact Information
Acutechnology Semiconductor Inc. 3487 McKee Rd. Suite 52 San Jose CA , USA 95127
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.
TEL: FAX: website:
(408) 259-2300 (408) 259-9160 www.acutechnology.com
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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7
Rev. 1.3
May 3, 2005

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