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 JA Thermal Resistance Junction-to-Ambient (No heat sink; No air flow) CONDITIONS IOUT = 10mA, TJ = 25oC, AP1121_ - VOUT1 4.8VVIN12V IOUT = 10mA, TJ = 25oC, AP1121A - VOUT2 4VVIN12V IOUT = 10mA, TJ = 25oC, AP1121B - VOUT2 4VVIN12V IO=10mA,VOUT+1.5V> 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 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