Regulator Controller SOT23-5 Package Preliminary Specificati

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Regulator Controller SOT23-5 Package Preliminary Specificati

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AQ120
Regulator Controller
SOT23-5 Package
Preliminary Specification Revision April 2006
General Description
AQ120 cost controller. AQ120 flexibility allows setting output voltage controls Amps output current with minimum number external components. open collector output capable driving external transistor. temperature stable bandgap reference (1.25 controls output voltage programmable through external resistors. AQ120 offered very small SOT23-5 package.
Applications Graphic cards motherboards Switching power supply post-regulation Telecom equipment video player Features 1.25V reference with 1.5% accuracy current consumption Offered small SOT23-5 package Wide range: 2.5V 20mA drive current sink RoHS compliant available Configuration
Block Diagram
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AQ120
Acutechnology Semiconductor Inc.
AQ120
Typical Application
Note: values R1and output voltage. typical Vref 1.25V
Descriptions
Name DRIVE BIAS VREF Function Output error amplifier. sink capability drive pass element Ground Must connect proper operation Controller Positive supply Voltage programming pin; threshold 1.25V.
Ordering Information
Device AQ120 AQ120
Note:
Operating -40C° 85C° -40C° 85C°
%Tol
Type SOT-23-5 SOT-23-5
VOUT 1.25V 1.25V
Wrap
Order Number AQ120EX-M5-AJ-TR AQ120EX-M5-AJ-TRL
parts Lead Free RoHS compliant. Rev. April 2006
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Acutechnology Semiconductor Inc.
AQ120
Absolute Maximum Ratings
Parameter Voltage DRIVE Voltage Voltage VCC, DRIVE, Current Operating Junction Temperature Lead Temperature (soldering seconds) Storage Temperature Range Value +150 Units
Electrical Specifications
Electrical characteristics guaranteed over full temperature range <Tj< Ambient temperature must de-rated based upon power dissipation package thermal characteristics. Unless otherwise stated, test conditions VDRIVE 4.3V, VGND BIAS GND. Symbol VREF LnREG LdREG VDRVlow DRIVE LEAK Parameter Supply Voltage Range Quiescent Supply Current Reference Voltage Reference Temperature Deviation Output variation with Supply Voltage Vref variation with Drive Current Reference input current Output Saturation Voltage Drive Current Output Leakage Current VREF= VCC= VDRIVE= VCC=2.5V IDRIVE IDRIVE 0.1mA VREF IDRIVE VREF DRIVE VREF VGND BIAS VDRIVE VREF 1.231 Conditions 1.250 0.15 1.268 0.20 Units mV/V %/mA
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Rev.
April 2006
Acutechnology Semiconductor Inc.
AQ120
APPLICATION
(Figure
GENERAL DESCRIPTION AQ120 linear voltage regulator controller. drives discrete transistor while comparing output 1.25V reference. output voltage programmable through external resistor divider. VOUT value above 1.25 Volts. collector external transistor provides output current load. range 2.5V 18V. Maximum Load current Beta times IDRIVE. IDRIVE range (max).
SETTING OUTPUT VOLTAGE AQ120 VREF input amplifier comparing precision 1.25V reference. With VREF tied back output, will drive base external maintain output voltage with changing load current VCC. regulated output voltage selecting proper ratio Output Voltage
Vout VREF
1.25V
Rev. April 2006
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Acutechnology Semiconductor Inc. SELECTION PASS DEVICE
AQ120
application (figure above, FMMT549 SOT223 package used. However, selection pass device based max, Iout max, Power dissipation your particular application. BVCEO BVCBO minimum rating transistor must exceed maximum application. AQ120 will stand max. Therefore maximum voltage will experience 18V. Iout Beta transistor will dictate maximum output current equation:
Iout Idrive max(20mA) BetaExt.PNP
Higher beta will improve Vout variation change load (load reg.) Minimizing Idrive required will also minimize Load reg. Vout will decrease .15% Idrive. Therefore, delta 10mA Idrive will cause delta 1.5% Vout. Power dissipation Selection external package based size requirements power dissipation. Consult transistor data sheet power considerations.
Contact Information
Acutechnology Semiconductor Inc. 3487 McKee Suite Jose 95127
Disclaimer
information furnished Acutechnology this data sheet believed accurate reliable. However, Acutechnology assumes responsibility use. Acutechnology reserves right change circuitry specifications time without notification customer.
TEL: FAX: website:
(408) 259-2300 (408) 259-9160 www.acutechnology.com
Life Support Policy
Acutechnology Products designed authorized components life support devices systems where malfunction product reasonably expected result personal injury. Life support devices systems devices systems that intended surgical implant into body support sustain life, whose failure perform reasonably expected result significant injury user.
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Rev.
April 2006
Acutechnology Semiconductor Inc.
AQ120
Package Dimensions SOT23-3, SOT23-4, SOT23-5, SOT23-6
www.acutechnology.com
Rev.
April 2006

Regulator Controller SOT23-5 Package Preliminary Specificati

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