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| AP1121 DUAL 1A LOW DROPOUT POSITIVE REGULATOR Features * * * * * * * * 1.3V maximum dropout at full load current Fast transient response Output current limiting for each channel Built-in thermal shutdown for each channel Good noise rejection Dual output ch1 = 3.3V, ch2 = 2.5V (ch2 = 1.8V for version B) SOP-8L: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant for Lead Free and "Green" Products (Note 1) General Description AP1121 is a low dropout positive regulator to provide 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 is a 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. Applications * * PC peripheral Communication Ordering Information AP1121X X X X Vout A : CH1=3.3V CH2=2.5V B : CH1=3.3V CH2=1.8V Note: Package S : SOP-8L Lead Free L : Lead Free G : Green Packing -U -13 : Tube : Taping 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device (Note 2) AP1121AS AP1121BS Tube/Bulk Package Packaging Quantity Part Number Code Suffix S S SOP-8L SOP-8L 100 100 -U -U 13" Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel 2500/Tape & Reel -13 -13 Note: 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AP1121 Rev. 4 1 of 7 www.diodes.com FEBRUARY 2007 (c) Diodes Incorporated AP1121 DUAL 1A LOW DROPOUT POSITIVE REGULATOR Pin Assignments (Top View) VOUT1 1 VIN1 2 VIN2 3 VOUT2 4 AP1121 8 7 6 5 GND GND GND GND Pin Descriptions NAME Descriptions GND 3.3V(VOUT1) 2.5V/1.8V (VOUT2) VIN Ground The output of the regulator. A minimum of 10uF capacitor (0.15 ESR 20) must be connected from this pin to ground to insure stability. The input pin of regulator. Typically a large storage capacitor (0.15 ESR 20) is connected from this pin to ground. AP1121 Rev. 4 2 of 7 www.diodes.com FEBRUARY 2007 (c) Diodes Incorporated AP1121 DUAL 1A LOW DROPOUT POSITIVE REGULATOR Block Diagram 2 VIN1 + 1.25V CURRENT LIMIT + + + 1 VOUT1 3 VIN2 + 1.25V CURRENT LIMIT + + + Typical Application Circuit 3.3V/1A C1 100uF 5V C2 100uF 2.5V/1A C3 100uF V OUT1 GND VIN1 GND VIN2 GND V OUT2 GND (3.3V/2.5V Dual output ) AP1121 Rev. 4 3 of 7 www.diodes.com - Thermal Shutdown - Thermal Shutdown - 5/6 GND 4 VOUT2 7/8 GND FEBRUARY 2007 (c) Diodes Incorporated AP1121 DUAL 1A LOW DROPOUT POSITIVE REGULATOR Absolute Maximum Ratings Symbol Parameter Rating Unit VIN TST TOP TM DC Supply Voltage Storage Temperature Operating Junction Temperature Range Maximum Junction Temperature -0.3 to 18 V -65 to +150 0 to +125 150 V o o C C oC Electrical Characteristics PARAMETER ( Under Operating Conditions ) Output Voltage Line Regulation Load Regulation Dropout Voltage (VIN-VOUT) Current Limit Minimum Load Current Thermal Regulation Ripple Rejection Temperature Stability CONDITIONS IOUT = 10mA, TA = 25oC, AP1121_ - VOUT1 4.8VVIN12V IOUT = 10mA, TA = 25oC, AP1121A - VOUT2 4VVIN12V IOUT = 10mA, TA = 25oC, AP1121B - VOUT2 4VVIN12V IO = 10mA, VOUT +1.5V TYP MAX UNIT 3.235 2.450 1.764 3.300 2.500 1.800 3.365 2.550 1.836 0.2 V V V % mV mV V A mA %/W dB % O 26 20 1.3 1. 1 5 0.008 60 0.5 177 158 29 19 33 25 1.4 10 0.04 70 IOUT = 1A, VOUT = 0.1%VOUT (VIN-VOUT) = 5V 0oCTj125oC (Note 5) TA = 25 oC, 30ms pulse F = 120Hz, COUT = 25uF Tantalum, IOUT = 1A IO = 10mA JA Thermal Resistance SOP8: Control Circuitry/Power Transistor (Note 6) Junction-to-Ambient (No CH1 or CH2 only heat sink; No air flow) CH1 & CH2 and PD1 = PD2 SOP8: Control Circuitry/Power Transistor JC Thermal Resistance (Note 6) CH1 or CH2 only Junction-to-Case CH1 & CH2 and PD1 = PD2 Note: 3. C/W O C/W 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. 4. 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. 5. 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. 6. Vout1 and Vout2 are connected to the PCB copper area 5.5mm*5.5mm separately. If you need large PD or lower Tc & Tj, please connect to the large copper area >> 5.5mm*5.5mm (like 10mm*10mm). AP1121 Rev. 4 4 of 7 www.diodes.com FEBRUARY 2007 (c) Diodes Incorporated AP1121 DUAL 1A LOW DROPOUT POSITIVE REGULATOR Typical Performance 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 Tj = 125 oC Tj = 25 oC -0.20 -0.40 -0.80 Dropout Voltage vs Output Current 2 1.5 1 Output Current (mA) 500 750 1000 -1 -25 0 Temperature (oC) 25 50 75 100 125 Load Regulation vs Temperature Output Voltage Deviation (%) -25 0 25 50 75 100 125 150 Output Voltage Change (%) 1 0. 5 0 -0.5 -1 -1.5 -2 -50 0.8 0.6 0.4 0.2 0 Percent Change in Output Voltage vs Temperature Output Voltage Deviation (mV) Input Voltage (V) Load Current (A) Output Voltage Deviation (mV) 7.5 6.5 5.5 40 20 0 -20 -40 Cin=1uF Cout=10uF Tantalum 30 20 10 0 -10 -20 2 1 0 -1 0 10 20 Temperature (oC) 2 4 Line Regulation C in = 1uF C out = 10 uF Tantalum Preload = 100mA Input Voltage (V) 6 8 10 12 0 20 40 60 TIME (us) 80 100 120 140 160 180 200 30 TIME (us) 40 50 60 70 80 90 100 Line Transient Response Load Transient Response AP1121 Rev. 4 5 of 7 www.diodes.com FEBRUARY 2007 (c) Diodes Incorporated AP1121 DUAL 1A LOW DROPOUT POSITIVE REGULATOR Marking Information SOP-8L (Top View) 8 Logo Part Number 5 A : 3.3V/2.5V version B : 3.3V/1.8V version AP1121 X YY WW X X L : Lead Free G : Green ID code: internal Xth week: 01~52 Year: "01" =2001 "02" =2002 ~ 1 SOP-8L 4 Device AP1121AS AP1121BS Package SOP-8L SOP-8L Identification Code AP1121 AP1121 Package Information Package Type: SOP-8L 3.70/4.10 5.79/6.20 0.08/0.25 0.254 0.38/1.27 Gauge Plane Seating Plane Detail "A" 7~9 1.30/1.50 1.75max. 0.20typ 7~9 0.35max. 45 Detail "A" 3.70/4.10 1.27typ 4.80/5.30 0.3/0.5 AP1121 Rev. 4 6 of 7 www.diodes.com FEBRUARY 2007 (c) Diodes Incorporated AP1121 DUAL 1A LOW DROPOUT POSITIVE REGULATOR IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AP1121 Rev. 4 7 of 7 www.diodes.com FEBRUARY 2007 (c) Diodes Incorporated |
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