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AX1212A Dataheets PDF



Part Number AX1212A
Manufacturers AXElite
Logo AXElite
Description 1.2V Output 1A LOW Dropout Linear Regulator
Datasheet AX1212A DatasheetAX1212A Datasheet (PDF)

AX1212A 1.2V Output 1A LOW Dropout Linear Regulator  GENERAL DESCRIPTION AX1212A is a low dropout positive 1.2V output regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications. AX1212A is also well suited for other applications such as VGA cards. AX1212A is guaranteed to have lower than 1.5V dropout at full load current making it ideal to provide well-regulated outputs of 1.2V with 2.6V to 12V i.

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AX1212A 1.2V Output 1A LOW Dropout Linear Regulator  GENERAL DESCRIPTION AX1212A is a low dropout positive 1.2V output regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications. AX1212A is also well suited for other applications such as VGA cards. AX1212A is guaranteed to have lower than 1.5V dropout at full load current making it ideal to provide well-regulated outputs of 1.2V with 2.6V to 12V input supply.  FEATURES Fixed 1.2V + 2% output voltage 1.5V maximum dropout at full load current Low-ESR Ceramic Capacitor (MLCC) Required for Stability Fast transient response Output current limiting Built-in thermal shutdown Good noise rejection Pb-Free Packages: SOT223, TO252  BLOCK DIAGRAM VÛmw`R•yÑb€ Vin 3 2 Vout w.goftechm + + CURRENT LIMIT 1.2V + + Thermal Shutdown - 1 GND 1/7 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.6 Sep.16, 2010 AX1212A  PIN ASSIGNMENT The packages of AX1212A are SOT223-3L and TO252-3L; the pin assignment is given by: SOT223 ( Top View ) 3 2 1 Tab is Vout TO252 ( Top View ) 3 2 1 Tab is Vout VIN Name VIN VOUT GND GND VOUT VIN VOUT GND Description A resistor divider from this pin to the VOUT pin and ground sets the output voltage. (Ground only for Fixed-Mode) The output of the regulator. A minimum of 4.7uF MLCC capacitor must be connected from this pin to ground to insure stability. The input pin of regulator. Typically a 4.7uF MLCC capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.5V higher than VOUT in order for the device to regulate properly.  ORDER/MARKING INFORMATION Order Information Logo 2 AX 1 2 1 A Ñb€ AX1212A X X y • `R w m Û Dropout Package m V Low o c Regulator . : SOT223-3L ch E e t D : TO252-3L o of g . Top Marking (SOT223-3L) w ww Y W WX Part number Functional code ID code: internal WW: 01~52 Year: A=2010 1=2011 Packing Blank : Tube A : Taping Top Marking (TO252-3L) 2 AX 1 2 1 A Y Y W WX Part number Functional code ID code: internal WW: 01~52 Year: 10=2010 11=2011 Logo  ABSOLUTE MAXIMUM RATINGS (TA = 25°C) Characteristics DC Supply Voltage Operating Junction Temperature Range Maximum junction Temperature Power Dissipation SOT-223 (multi-layer PCB cupper area 10mm*10mm) TO-252 TA=25oC, TJ=125°C Storage Temperature Symbol VIN TOP TMJ PD TST Rating -0.3 to 12 -40 to +125 150 1330 1810 -65 to +150 Unit V °C °C mW °C 2/7 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.6 Sep.16, 2010 AX1212A  ELECTRICAL CHARACTERISTICS (Under Operating Conditions) Characteristics Operation Input Voltage Output Voltage Line Regulation Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Ripple Rejection Temperature Stability  JA Thermal Conditions Min 2.6 Typ Max Units 12 V V mV mV mV V A mA dB % °C/W IOUT=10mA, 2.6V≦VIN≦12V, TJ = 25°C IOUT=10mA, 2.6V≦VIN≦7V, TJ=25°C (Note 1,2) IOUT=10mA, 2.6V≦VIN≦12V, TJ=25°C (Note 1,2) VIN=2.7V, 10mA< IOUT <1A, TJ=25°C (Note 1,2) IOUT=1A , VOUT=1%VOUT (VIN-VOUT) = 3V 0°C≦Tj≦125°C F=120Hz,COUT=4.7uF , IOUT=1A,VIN=5V IOUT =10mA SOT-223 VÛmw`R•yÑb€ TO-252 SOT-223 TO-252 1.175 1.20 1.225 1. 1 1.2 1.8 1.3 5 60 0.5 75 55 15 10 3.6 6 12 1.5 10 70 - Resistance Junction-to-Ambient (Note 4)  JC Thermal Resistance Junction-to-Case w.goftechm - - °C/W Note1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18” from the package. Note2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference between input and output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range. Note3: Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. Note4: Tap is connected to the multi-layer PCB cupper area 10mm*10mm. 3/7 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.6 Sep.16, 2010 AX1212A  APPLICATION CIRCUIT VIN+3.3V AX1212A VIN VOUT GND Vout=1.2V 3 2 1 C2 4.7uF C1 4.7uF w •yÑb€ R ` w VÛm om c . ch e t o of g . ww 4/7 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.6 Sep.16, 2010 AX1212A  TYPICAL CHARACTERISTICS 2. 0 1. 8 0.20 Output Voltage Deviation (%) 1. 6 0 I load=800mA Dropout Voltage (V) 1. 4 1. 2 1. 0 0. 8 0. 6 0. 4 0. 2 0 0 250 500 750 1000 Tj = 125 oC Tj = 25 oC -0.20 -0.40 -0.80 -1 -.


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