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| APL1541 1A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 3.3V Features * * * * * * * * * * Guaranteed Output Voltage Accuracy within 2% Fast Transient Response Guaranteed Dropout Voltage at Multiple Currents Load Regulation : 0.1% Typ. Line Regulation : 0.03% Typ. Low Dropout Voltage : 1.1V Typ. at IOUT =1A Current Limit : 1A Typ. at TJ=125 C On-Chip Thermal Limiting : 150 C Typ. Adjustable Output : 1.25~7.75V Standard 8-pin SO Power Package General Description The APL1541 is a low dropout three-terminal adjustable regulators with 1A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications , the APL1541 has been optimized. The device is available in an adjustable version and fixed output voltages of 3.3V, the output available voltage range is from 1.25~7.75V with an input supply below 12V. Dropout voltage is guaranteed at a maximum of 1.3V at 1A. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures. The APL1541 is available in the industry standard 8pin SO power package which can be used in applications where space is limited. Applications * * * * Peripheral Cards Active SCSI Terminators Low Voltage Logic Supplies Post Regulator for Switching Power Supply ADJ/GND VIN NC 2 7 Pin Description NC 1 8 VOUT VOUT VOUT VOUT APL1541-33 3 6 4 5 Front View for SO - 8 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 1 www.anpec.com.tw APL1541 Ordering and Marking Information A P L1 54 1 Le ad F ree C ode H andlin g C o de T e m p. R ang e P ac k ag e C od e V oltage C od e P ac k a g e C od e K : S O P -8 T e m p. R ang e C : 0 to 70 C H andlin g C o de T U : T u be T R : T a pe & R eel V oltage C od e 33 : 3.3V B lank : A djus table V e rs ion Le ad F ree C ode L : L e a d F re e D e vic e B la nk : O rigin a l D ev ic e A P L1 541- 33 : A P L1 541 XX XX X3 3 A P L1 541- A P L1 541 XX XX X XX XX X - D a te C ode XX XX X - D a te C ode Absolute Maximum Ratings Symbol VI TJ Input Voltage Operating Junction Temperature Range Control Section Power Transistor Storage Temperature Range Lead Temperature (Soldering, 10 second) Parameter Rating 13.2 0 to 125 0 to 150 -65 to +150 260 Unit V C C C TSTG TL Electrical Characteristics Symbol VREF VOUT Parameter Test Conditions APL1541 Min. Typ. Max. 1.225 3.235 1.250 3.300 1.275 3.365 Unit V V Reference Voltage 10mA IOUT 1A, 1.4V(VIN -VOUT) 9.75V, APL1541 TJ =0~125C Output Voltage TJ =0~125C, APL1541-33 0 IOUT 1A, 4.75VVIN12V, Line Regulation TJ =0~125C APL1541 IOUT=10mA, 1.5V(VIN -VOUT) 9.75V, (note1) APL1541-33 IOUT=0A, 4.75V(VIN -VOUT) 7.75V, (note 1) Load Regulation TJ =0~125C APL1541 (VIN -VOUT)=3V, 0 IOUT 1A ,(note 1) APL1541-33 VIN=4.75V, 0 IOUT 1A ,(note 1) Dropout Voltage IOUT=100mA ,TJ =0~125C IOUT=500mA ,TJ =0~125C IOUT=1A ,TJ =0~125C REG LINE 0.03 1 0.1 1 1 1.05 1.1 0.2 6 0.4 10 1.1 1.2 1.3 % mV % mV V REG LOAD VD Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 2 www.anpec.com.tw APL1541 Electrical Characteristics Cont. Symbol ILIMIT IADJ Parameter Current Limit Test Conditions (VIN -VOUT)=5V, TJ=25C APL1541 Min. Typ. Max. 1 60 0.2 120 5 A Unit A A Adjust Pin Current (VIN -VOUT)=3V, IOUT=10mA, TJ=0~125C APL1541 Adjust Pin Current TJ=0~125C, 10mA IOUT 1A, IADJ Change 1.4V(VIN -VOUT) 9.75V APL1541 Minimum Load Current IO TJ=0~125C, (VIN -VOUT)=9.75V, (note 3) APL1541 Ripple Rejection FRIPPLE=120Hz, VRIPPLE=1VP-P, PSRR (VIN -VOUT)=3V, TJ=0~125C Thermal TR TJ=25C, 30ms Pulse Regulation Temperature TS Stability Long -Term LS TJ =125C,1000Hrs. Stability RMS Output TJ=25C,10HzF10kHz, VN Noise (% of VOUT) Thermal Junction to Case, at Tab th Resistance Junction to ambient Quiescent Current TJ=0~125C, Iq APL1541-33 VIN12V sured at a constant junction temperature by low duty cycle pulse testing. 1.7 60 75 0.01 0.5 0.3 0.003 15 50 5.5 10 0.02 mA dB %/ W % % % C/ W mA Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are meaNote 2: Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/ output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage curve. Note 3: Minimum load current is defined as the minimum output current required to maintain regulation. Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 3 www.anpec.com.tw APL1541 Application Circuits Simple 5V to 3.3V Regulation 1.25V to 7.75V Adjustable Regulator A P L 1 5 4 1 -3 3 V IN = 5 V IN OUT V O U T = 3 .3 V V IN AP L1541 IN OUT R1 121 100uF C 2* R2 1K V OUT GND 10uF 10uF 10uF C 1* ADJ *Needed if device is far from filter capacitors VOUT = 1.250V x Improving Ripple Rejection R1+R2 R1 5V Regulator with Shutdown A P L1541 V IN 10uF IN OUT R1 121 150uF R2 365 1% TTL C1 10uF VOUT V IN IN AP L1541 OUT 121 1% 100uF 365 1% 1K 5V ADJ ADJ 10uF 1K *C1 improves ripple rejection.XC should be approximately equal to R1 at ripple frequency Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 4 www.anpec.com.tw APL1541 Typical Characteristics Load Transietn Response 5 4.5 4 0.01 5 APL1541-33 Line Transient Response 0.02 APL1541-33 6 0.15 Output Current (A) 3.5 3 2.5 2 1.5 1 0.5 0 -100 100 300 500 700 -0.03 900 CIN=10F COUT=10F Tantalum VIN=5V 0.1 0 Input Voltage (V) 4 3 2 0 1 0 -20 30 80 130 -0.05 180 CIN=10F COUT=10F Tantalum IOUT=0.1A 0.05 -0.01 -0.02 Time (S) Time (S) Dropout Voltage vs. Output Current APL1541-33 Output Voltage vs. Input Voltage 3.5 3 APL1541-33 1.25 1.2 Dropout Voltage (V) 1.15 1.1 1.05 1 0.95 0.9 0 0.2 0.4 0.6 0.8 1 Output Voltage (V) 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 7 8 9 Output Current (A) Input Voltage (V) Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 5 www.anpec.com.tw APL1541 Typical Characteristics Cont. Input Current vs. Input Voltage 6 APL1541-33 Current Limit vs. Input Voltage APL1541-33 2.4 2.2 2 1.8 1.6 1.4 1.2 1 5 Input Current (mA) 4 3 2 1 0 0 2 4 6 8 10 12 Current Limit (A) 5 7 9 11 13 Input Voltage (V) Input Voltage (V) Output Voltage vs. Temperature 3.4 APL1541-33 Adjustable Pin Current vs. Temperature APL1541-Adj 70 68 Adjustable Pin Current (A) -50 -25 0 25 50 75 100 125 Output Voltage (V) 3.3 66 64 62 60 58 56 54 52 50 -50 -25 0 25 50 75 100 125 3.2 3.1 3 Temperature (C) Temperature (C) Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 6 www.anpec.com.tw APL1541 Typical Characteristics Cont. Input Current vs. Tmeperature APL1541-33 Current Limit vs. Temperature 1.9 1.8 APL1541-33 8 7 Current Limit (A) 1.7 1.6 1.5 1.4 1.3 1.2 1.1 Input Current (mA) VIN-VOUT=5V 6 5 4 3 2 -50 1 -25 0 25 50 75 100 125 -50 0 50 100 150 Temperature (C) Temperature (C) PSRR vs. Frequency APL1541-Adj +0 Cadj=22F -10 IOUT=0.1A Vripple=1Vp-p -20 -30 PSRR (dB) -40 -50 -60 -70 -80 -90 -100 10 20 50 100 200 500 1k 2k VIN-VOUT>=3V VIN-VOUT>=Vdropout 5k 10k 20k 50k 200k Frequency (Hz) Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 7 www.anpec.com.tw APL1541 Application Information Output Voltage The APL1541 develops a 1.25V reference voltage between the output and the adjust terminal. By placing a resistor between these two terminals, a constant Current is caused to flow through R1 and down through R2 to set the overall output voltage. Normally this current is chosen to be the specified minimum load current of 10mA. For fixed voltage devices R1 and R2 are included in the device. APL1541 IN OUT ADJ IADJ 60 A R2 V IN APL1541 IN OUT ADJ Rp P A R A S IT IC L IN E R E S IS T A N C E R1 CONNECT R1 TO CASE R2 RL CONNECT R2 TO LO AD V IN V OUT VREF R1 Figure 2. Connections for Best Load Regulation Input Capacitor R2 )+IADJR 2 R1 VOUT = VREF(1+ An input capacitor of 10F or greater is recommended. Tantalum, or aluminum electrolytic capacitors can be used for bypassing. Larger Values will improve ripple rejection by bypassing the input to the regulator. Figure 1. Basic Adjustable Regulator Load Regulation When the adjustable regulator is used. Load regulation will be limited by the resistance of the wire connecting the regulator to the load. The data sheet specification for load regulation is measured at the output pin of the device. Best load regulation is obtained when the top of the resistor divider (R1) is tied directly to the output pin of the device, not to the load. For fixed voltage devices the top of R1 is internally connected to the output, and the ground pin can be connected to low side of the load. If R1 were connected to the load, RP is multiplied by the divider ratio, the effective resistance between the regulator and the load would be: R2 Rp X (1+ ), Rp = Parasitic Line Resistance R1 Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 8 Output Capacitor The APL1541 requires an output capacitor to maintain stability and improve transient response. Proper capacitor selection is important to ensure proper operation. The APL1541 output capacitor selection is dependent upon the ESR (equivalent series resistance) of the output capacitor to maintain stability. When the output capacitor is 10uF or greater, the output capacitor should have an ESR less than 1.This will improve transient response as well as promote stability. A low-ESR solid tantalum capacitor works extremely well and provides good transient response and stability over temperature. www.anpec.com.tw APL1541 Application Information (Cont.) Output Capacitor (Cont.) Aluminum electrolytics can also be used, as long as the ESR of the capacitor is <1. The value of the output capacitor can be increased without limit. Higher capacitance values help to improve transient response and ripple rejection and reduce output noise. PD = (VIN - VOUT) x IOUT Maximum junction temperature is equal to : TJUNCTION = TAMBIENT + (PD x JA) Note: TJUNCTION must not exceed 125C Ripple Rejection The curves for Ripple Rejection were generated using an adjustable device with the adjust pin bypassed. With a 22F bypassing capacitor 75dB ripple rejection is obtainable at any output level. The impedance of the adjust pin capacitor, at the ripple frequency, should be < R1. R1 is normally in the range of 100200. The size of the required adjust pin capacitor is a function of the input ripple frequency. At 120Hz, with R1=100, the adjust pin capacitor should be 13F. For fixed voltage devices, and adjustable devices without an adjust pin capacitor, the output ripple will increase as the ratio of the output voltage to the reference voltage (VOUT /VREF ). Thermal Considerations APL1541 has thermal protection which limits junction temperature to 150C. However, device functionality is only guaranteed to a maximum junction temperature of +125C. The thermal resistance for each application will be affected by thermal interactions with other components on the board. Some experimentation will be necessary to determine the actual value. The power dissipation of APL1541 is equal to : Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 9 www.anpec.com.tw APL1541 Packaging Information SOP-8 pin ( Reference JEDEC Registration MS-012) E H e1 D e2 A1 A 1 L 0.004max. Dim A A1 D E H L e1 e2 1 Mi ll im et er s Min. 1. 35 0. 10 4. 80 3. 80 5. 80 0. 40 0. 33 1. 27B S C 8 Max . 1. 75 0. 25 5. 00 4. 00 6. 20 1. 27 0. 51 Min. 0. 053 0. 004 0. 189 0. 150 0. 228 0. 016 0. 013 0.015X45 Inche s Max . 0. 069 0. 010 0. 197 0. 157 0. 244 0. 050 0. 020 0. 50B S C 8 Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 10 www.anpec.com.tw APL1541 Physical Specifications Terminal Material Lead Solderability Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3. Reflow Condition TP (IR/Convection or VPR Reflow) tp C ritical Z one T L to T P R am p-up T e m p e ra tu re TL T sm ax tL T sm in R am p-down ts Preheat 25 t 25 C to Peak T im e Classificatin Reflow Profiles Profile Feature Sn-Pb Eutectic Assembly Large Body Small Body Pb-Free Assembly Large Body Small Body 3C/second max. 150C 200C 60-180 seconds 3C/second max 217C 60-150 seconds 245 +0/-5C 250 +0/-5C 10-30 seconds 20-40 seconds Average ramp-up rate 3C/second max. (TL to TP) Preheat - Temperature Min (Tsmin) 100C - Temperature Mix (Tsmax) 150C - Time (min to max)(ts) 60-120 seconds Tsmax to TL - Ramp-up Rate Tsmax to TL - Temperature(TL) 183C - Time (tL) 60-150 seconds Peak Temperature(Tp) 225 +0/-5C 240 +0/-5C Time within 5C of actual Peak 10-30 seconds 10-30 seconds Temperature(tp) Ramp-down Rate 6C/second max. 6 minutes max. Time 25C to Peak Temperature Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 11 6C/second max. 8 minutes max. www.anpec.com.tw Note: All temperatures refer to topside of the package. Measured on the body surface. APL1541 Reliability test program Test item SOLDERABILITY HOLT PCT TST ESD Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD 78 Description 245C , 5 SEC 1000 Hrs Bias @ 125 C 168 Hrs, 100 % RH , 121C -65C ~ 150C, 200 Cycles VHBM > 2KV, VMM > 200V 10ms , Itr > 100mA Carrier Tape Po E P1 P D t F W Bo Ao Ko D1 T2 J C A B T1 Application A 330 1 B 62 +1.5 D C 12.75+ 0.15 D1 J 2 0.5 Po T1 12.4 0.2 P1 2.0 0.1 T2 2 0.2 Ao 6.4 0.1 W 12 0. 3 Bo 5.2 0. 1 P 8 0.1 Ko 2.1 0.1 E 1.750.1 t .30.013 SOP- 8 F 5.5 1 1.55 +0.1 1.55+ 0.25 4.0 0.1 (mm) Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 12 www.anpec.com.tw APL1541 Cover Tape Dimensions Application SOP- 8 Carrier Width 12 Cover Tape Width 9.3 Devices Per Reel 2500 Customer Service Anpec Electronics Corp. Head Office : 5F, No. 2 Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 7F, No. 137, Lane 235, Pac Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, R. O. C. Tel : 886-2-89191368 Fax : 886-2-89191369 Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 13 www.anpec.com.tw |
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