AQ105 ACUTECH | Alldatasheet

Document overview

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Technical content

Features

  • 1.25V reference
  • 200mV current limit threshold
  • Error amp output swings near ground for low voltage operation
  • High PSRR and line regulation
  • Low current consumption
  • Offered in ultra small SC70-5 package
  • Open collector output
  • Low voltage operation 2.2V
  • 10mA current sink
  • 50 ppm/ºC typical temperature deviation
  • RoHS compliant available Block Diagram Pin Configuration

Acutechnology Semiconductor Inc. AQ105 www.acutechnology.com 2 Rev. 1.3 July 17, 2006 Typical Application Pin Descriptions Pin Pin Name Function

1 VCC Positive supply

2 GND Ground

3 COMP Output of error amplif ier; 10 mA source/sink capability

4 FB Inverting input to error amp lifier; will have threshold of 1.25V.

5 CS Current sense input

Ordering Information

Device Operating Tj %Tol Pkg Type V OUT Wrap Ordering Number AQ105 -20C ˚ ≤ 105C˚ 1.0 SOT-23-5 1.25V T&R AQ105DY-M5-12-TR AQ105 -20C ˚ ≤ 105C˚ 1.0 SOT-23-5 1.25V T&R AQ105DY-M5-12-TRL AQ105 -20C ˚ ≤ 105C˚ 1.0 SC70-5 1.25V T&R AQ105DY-C5-12-TR AQ105 -20C ˚ ≤ 105C˚ 1.0 SC70-5 1.25V T&R AQ105DY-C5-12-TRL Note: The TRL parts are Lead Free and RoHS compliant.

Acutechnology Semiconductor Inc. AQ105 www.acutechnology.com 3 Rev. 1.3 July 17, 2006 Absolute Maximum Ratings Parameter Value Units VCC Voltage 20 V COMP Voltage 20 V REF Voltage 20 V CS Voltage (Self limiting diodes) ±1 V VCC, COMP, REF, CS Current 50 mA Operating Junction Temperature 150 ºC Lead Temperature (soldering 10 seconds) 260 ºC Storage Temperature Range -65 to +150 ºC ESD Rating (HBM) 2 KV Electrical Specifications Electrical characteristics are guaranteed over the full temperature range –20ºC <Tj<105ºC. Ambient temperature must be de-rated based upon power dissipation and package thermal characteristics. Unless otherwise stated, test conditions are VCC = 3V, VCOMP = VFB, ICOMP = 1mA. Symbol Parameter Conditions Min Typ Max Units Vcc Supply Voltage 2.2 18 V Icc Quiescent Supply Current VC OMP=1V VCC=15V 0.2 0.5 mA Vref Reference Voltage Ta=25 ºC 1.238 1.250 1.263 V DVcc Line regulation VCC=2.5V to VCC=18V 0.2 1 mV DViload Load Regulation ICOMP=1mA to 5mA 1 2 mV Tcref Reference Temperature Deviation -20ºC <Tj<105ºC 0.5 1 % IFB REF input current -500 500 nA PSRR Power Supply Rejection Freq.=300KHz 40 dB Av Error Amplifier Open Loop Gain ICOMP=2mA, COMP=1V 80 dB BW Unity Gain Frequency ICOMP=2mA, COMP=1V 2.5 MHz VCOMP Output Saturation Voltage ICOMP=10mA, VFB=HIGH 200 250 mV TRANSC Output Transconductance IC OMP=1mA to 20mA 2.5 mA/mV Ileak Output Leakage Current VCOMP=16 VFB=0 200 400 nA Tj=25ºC 197 203 mV Vcs Current sense threshold voltage -20<Tj<105ºC 195 205 Gain Current sense gain to reference -20<Tj<105ºC 36 40 44 mV/mV Vcs=-200 mV 150 Ics Bias current Vcs=-250 mV 220 µA

Acutechnology Semiconductor Inc. AQ105 www.acutechnology.com 4 Rev. 1.3 July 17, 2006 Package Dimensions SOT23-3, SOT23-4, SOT23-5, SOT23-6

Acutechnology Semiconductor Inc. AQ105 www.acutechnology.com 5 Rev. 1.3 July 17, 2006 Package Dimensions (contd.) SC70-3, SC70-4, SC70-5, SC70-6 Contact Information Acutechnology Semiconductor Inc. TEL: (408) 259-2300 3487 McKee Rd. Suite 52 FAX: (408) 259-9160 San Jose CA , USA 95127 website: www.acutechnology.com Disclaimer The information furnished by Acutechnology in this data s heet 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 ex pected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended fo r surgical implant into the body or (b) support or sustain life, and whose failure t o perform can be reasonably expected to result in a significant injury to the user.