AP1121 Dual 1A Low Dropout Positive Regulator Features • • • • • • • General Description AP1121 series are low dropout positive regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V/2.5V or 3.3V/1.8V logic supply. AP1121 series are guaranteed to have <1.3V dropout at full load current making it ideal to provide well regulated outputs dual channels with up to 18V input supply. 1.3V maximum dropout at full load current Fast transient response Output current limiting for each channel. Built-in thermal shutdown each channel. Good noise rejection Dual output ch1=3.3V, ch2=2.5V (1.8V for B version) Pb-Free Packages: SOP-8L Applications • • PC peripheral Communication Connection Diagram Pin Descriptions (Top View) NAME VOUT1 1 8 GND VIN 2 7 GND VIN 3 6 GND VOUT2 4 5 GND GND 3.3V(VOUT1) 2.5V/1.8V (VOUT2) AP1121 VIN FUNCTION Ground The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability. The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground. Ordering Information AP 1121 X X Vout A : CH1=3.3V CH2=2.5V B : CH1=3.3V CH2=1.8V Package S : SOP-8L X Packing Blank : Tube A : Taping This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. 0.0 Mar. 4, 2004 1/5 AP1121 Dual 1A Low Dropout Positive Regulator Typical Circuit 3.3V/1A C1 100uF VOUT1 GND 5V C2 100uF 2.5V/1A C3 100uF VIN GND VIN GND VOUT2 GND (3.3V/2.5V Dual output ) Absolute Maximum Ratings Symbol Parameter Rating Unit V VIN DC Supply Voltage -0.3 to 18 V PD Power Dissipation Internally Limited TST Storage Temperature TOP -65 to +150 o 0 to +150 o Operating Junction Temperature Range C C Block Diagram 2 1 VIN VOUT1 + + － 1.25V + CURRENT LIMIT + 5/6 － Thermal Shutdown GND 4 3 VOUT2 VIN + + － 1.25V + CURRENT LIMIT + － Thermal Shutdown 7/8 GND Anachip Corp. www.anachip.com.tw Rev. 0.0 Mar. 4, 2004 2/5 AP1121 Dual 1A Low Dropout Positive Regulator Electrical Characteristics (Under Operating Conditions) PARAMETER Output Voltage Line Regulation Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Thermal Regulation Ripple Rejection Temperature Stability θ JA Thermal Resistance Junction-to-Ambient (No heat sink; No air flow) CONDITIONS IOUT = 10mA, TJ = 25oC, AP1121_ - VOUT1 4.8V≦VIN≦12V IOUT = 10mA, TJ = 25oC, AP1121A - VOUT2 4V≦VIN≦12V IOUT = 10mA, TJ = 25oC, AP1121B - VOUT2 4V≦VIN≦12V IO=10mA,VOUT+1.5V<VIN<12V, TJ=25oC VIN = 5V, 0≦IOUT≦1A, AP1121 series o VOUT1 TJ=25 C (Note 1,2) AP1121 series VIN=4V, 0mA<Io<1A, VOUT2 TJ=25oC (Note 1,2) MIN TYP MAX UNIT 3.235 3.300 3.365 V 2.450 2.500 2.550 V 1.764 1.800 1.836 V 0.2 % 26 33 mV 20 25 mV 1.3 1.4 V 5 0.008 60 0.5 10 0.04 70 A mA %/W dB % IOUT = 1A,∆VOUT=0.1%VOUT (VIN-VOUT) = 5V 0oC≦Tj≦125oC (Note 3) TA=25 oC, 30ms pulse F=120Hz,COUT=25uF Tantalum, IOUT=1A IO=10mA SOP8: Control Circuitry/Power Transistor (Note4) CH1 or CH2 only CH1 & CH2 and PD1=PD2 SOP8: Control Circuitry/Power Transistor θ JC Thermal Resistance (Note 4) CH1 or CH2 only Junction-to-Case CH1 & CH2 and PD1=PD2 1. 1 50 45 O 20 12 O C/W 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 input/output differentially 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 that requires maintaining regulation. At 12V input/output differential the device is guaranteed to regulate if the output current is greater than 10mA. Note4: Vout1 and Vout2 are connected to the PCB cupper area 5.5mm*5.5mm separately. If you need large PD or lower Tc & Tj, please connect to the large cupper area >> 5.5mm*5.5mm (like 10mm*10mm). Anachip Corp. www.anachip.com.tw Rev. 0.0 Mar. 4, 2004 3/6 AP1121 Dual 1A Low Dropout Positive Regulator Typical Performance Characteristics 0.20 2. 0 Output Voltage Deviation (%) 1. 8 1. 6 Dropout Voltage (V) 1. 4 1. 2 0 I load=800mA -0.20 Tj = 25 oC 1. 0 -0.40 0. 8 Tj = 125 oC 0. 6 -0.80 0. 4 0. 2 0 0 200 400 Output Current (mA) 600 -1 800 -25 Dropout Voltage vs Output Current 0 25 50 Temperature (oC) 75 100 125 Load Regulation vs Temperature 2 1 0.8 1 0. 5 0 -0.5 -1 -1.5 -2 -50 -25 0 25 50 Temperature (oC) 75 100 125 150 Output Voltage Deviation (%) Output Voltage Change (%) 1.5 0.6 0.4 0.2 0 2 4 7.5 Cin=1uF Cout=10uF Tantalum 6.5 5.5 40 20 0 -20 -40 0 20 40 60 80 100 120 140 160 180 200 TIME (us) 8 10 12 Line Regulation Load Current (A) Output Voltage Deviation (mV) Output Voltage Deviation (mV) Input Voltage (V) Percent Change in Output Voltage vs Temperature 6 Input Voltage (V) Line Transient Response 30 C in = 1uF C out = 10 uF Tantalum Preload = 100mA 20 10 0 -10 -20 2 1 0 -1 0 10 20 30 40 50 TIME (us) 60 70 80 90 100 Load Transient Response Anachip Corp. www.anachip.com.tw Rev. 0.0 Mar. 4, 2004 4/5 AP1121 Dual 1A Low Dropout Positive Regulator Marking Information ( Top View ) 8 5 A : 3.3V/2.5V version B : 3.3V/1.8V version AC Logo AP1121 X YY WW X ID code: internal Xth week: 01~52 Year: "01" =2001 "02" =2002 4 1 ~ SOP-8L H E Package Information L VIEW "A" D 0.015x45 7 (4X) e B A1 C A A2 7 (4X) VIEW "A" y Symbol A A1 A2 B C D E e H L y θ Dimensions In Millimeters Min. Nom. Max. 1.40 1.60 1.75 0.10 0.25 1.30 1.45 1.50 0.33 0.41 0.51 0.19 0.20 0.25 4.80 5.05 5.30 3.70 3.90 4.10 1.27 5.79 5.99 6.20 0.38 0.71 1.27 0.10 O O 8 0 Anachip Corp. www.anachip.com.tw Dimensions In Inches Min. Nom. Max. 0.055 0.063 0.069 0.040 0.100 0.051 0.057 0.059 0.013 0.016 0.020 0.0075 0.008 0.010 0.189 0.199 0.209 0.146 0.154 0.161 0.050 0.228 0.236 0.244 0.015 0.028 0.050 0.004 O O 0 8 Rev. 0.0 Mar. 4, 2004 5/5