APL1541 1A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 3.3V Features 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. Guaranteed Output Voltage Accuracy within 2% Fast Transient Response Guaranteed Dropout Voltage at Multiple Currents • • • • • • • 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. 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 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. On-Chip Thermal Limiting : 150 °C Typ. Adjustable Output : 1.25~7.75V Standard 8-pin SO Power Package The APL1541 is available in the industry standard 8pin SO power package which can be used in applications where space is limited. Applications • • • • Pin Description Peripheral Cards Active SCSI Terminators Low Voltage Logic Supplies NC 1 ADJ/GND 2 8 VOUT 7 VOUT Post Regulator for Switching Power Supply APL1541-33 VIN 3 6 VOUT NC 4 5 VOUT 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 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 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 A P L1 541- A P L1 541 XX XX X A P L1 541- 33 : XX XX X - D a te C ode A P L1 541 XX XX X3 3 XX XX X - D a te C ode Absolute Maximum Ratings Symbol Parameter Rating Unit 13.2 V °C VI Input Voltage TJ TSTG Operating Junction Temperature Range Control Section Power Transistor Storage Temperature Range 0 to 125 0 to 150 -65 to +150 °C TL Lead Temperature (Soldering, 10 second) 260 °C Electrical Characteristics Symbol VREF VOUT REG LINE REG LOAD VD Parameter Test Conditions Min. APL1541 Typ. Max. Unit Reference Voltage 10mA≤ IOUT ≤1A, 1.4V≤(VIN -VOUT) ≤9.75V, APL1541 TJ =0~125°C 1.225 1.250 1.275 V Output Voltage TJ =0~125°C, APL1541-33 0≤ IOUT≤ 1A, 4.75V≤VIN≤12V, 3.235 3.300 3.365 V 0.03 1 0.2 6 % mV 0.1 1 0.4 10 % mV 1 1.05 1.1 1.1 1.2 1.3 V Line Regulation TJ =0~125°C 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 =0~125°C APL1541 (VIN -VOUT)=3V, 0≤ IOUT ≤1A ,(note 1) APL1541-33 VIN=4.75V, 0≤ IOUT ≤1A ,(note 1) Dropout Voltage IOUT=100mA ,TJ =0~125°C IOUT=500mA ,TJ =0~125°C IOUT=1A ,TJ =0~125°C Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 2 www.anpec.com.tw APL1541 Electrical Characteristics Cont. Symbol ILIMIT Parameter Current Limit Test Conditions (VIN -VOUT)=5V, TJ=25°C Adjust Pin Current (VIN -VOUT)=3V, IOUT=10mA, TJ=0~125°C IADJ APL1541 Adjust Pin Current TJ=0~125°C, 10mA≤ IOUT ≤1A, ∆IADJ Change 1.4V≤(VIN -VOUT) ≤9.75V APL1541 Minimum Load Current IO TJ=0~125°C, (VIN -VOUT)=9.75V, (note 3) APL1541 Ripple Rejection FRIPPLE=120Hz, VRIPPLE=1VP-P, PSRR (VIN -VOUT)=3V, TJ=0~125°C Thermal TR TJ=25°C, 30ms Pulse Regulation Temperature TS Stability Long -Term LS TJ =125°C,1000Hrs. Stability RMS Output TJ=25°C,10Hz≤F≤10kHz, VN Noise (% of VOUT) Thermal Junction to Case, at Tab θth Resistance Junction to ambient Quiescent Current TJ=0~125°C, Iq APL1541-33 VIN≤12V Min. 1 APL1541 Typ. Max. Unit A 60 120 0.2 5 µA µA 1.7 60 mA 75 0.01 dB 0.02 0.5 %/ W % 0.3 % 0.003 % 15 50 °C/ W 5.5 10 mA Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are measured at a constant junction temperature by low duty cycle pulse testing. Note 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 AP L1541 A P L 1 5 4 1 -3 3 V IN = 5 V IN V IN V O U T = 3 .3 V OUT IN R1 121Ω ADJ GND 10uF V OUT OUT 10uF C 1* 10uF 100uF C 2* R2 1K *Needed if device is far from filter capacitors VOUT = 1.250V x 5V Regulator with Shutdown Improving Ripple Rejection AP L1541 A P L1541 V IN 10uF IN R1+R2 R1 OUT V IN VOUT R1 121Ω ADJ ADJ 121Ω 1% 100uF 365Ω 1% TTL C1 10uF 5V OUT 10uF 1K 150uF R2 365Ω 1% IN 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 Line Transient Response APL1541-33 5 0.02 APL1541-33 6 0.15 4.5 5 0.01 0.1 3.5 3 Input Voltage (V) Output Current (A) 4 0 2.5 CIN=10µF COUT=10µF Tantalum V IN=5V 2 1.5 -0.01 -0.02 1 0.5 0 -100 100 300 500 -0.03 900 700 4 CIN=10µF COUT=10µF Tantalum IOUT=0.1A 3 2 0 1 0 -20 30 Time (µS) 80 -0.05 180 130 Time (µS) Dropout Voltage vs. Output Current Output Voltage vs. Input Voltage APL1541-33 1.25 3.5 1.2 3 1.15 2.5 Output Voltage (V) Dropout Voltage (V) 0.05 1.1 1.05 1 APL1541-33 2 1.5 1 0.5 0.95 0 0.9 0 0.2 0.4 0.6 0.8 0 1 Output Current (A) Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 1 2 3 4 5 6 7 8 9 Input Voltage (V) 5 www.anpec.com.tw APL1541 Typical Characteristics Cont. Current Limit vs. Input Voltage Input Current vs. Input Voltage APL1541-33 APL1541-33 6 2.4 2.2 Current Limit (A) Input Current (mA) 5 4 3 2 1 2 1.8 1.6 1.4 1.2 0 1 0 2 4 6 8 10 12 5 7 9 11 13 Input Voltage (V) Input Voltage (V) Output Voltage vs. Temperature Adjustable Pin Current vs. Temperature APL1541-33 3.4 APL1541-Adj 70 Adjustable Pin Current (µA) Output Voltage (V) 68 3.3 3.2 3.1 3 -50 -25 0 25 50 75 100 64 62 60 58 56 54 52 50 -50 125 Temperature (°C) Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 66 -25 0 25 50 75 100 125 Temperature (°C) 6 www.anpec.com.tw APL1541 Typical Characteristics Cont. Current Limit vs. Temperature Input Current vs. Tmeperature APL1541-33 8 APL1541-33 1.9 1.8 Current Limit (A) Input Current (mA) 7 6 5 4 1.7 V IN-V OUT =5V 1.6 1.5 1.4 1.3 1.2 3 1.1 2 -50 1 -25 0 25 50 75 100 125 -50 Temperature (°C) 0 50 100 150 Temperature (°C) PSRR vs. Frequency APL1541-Adj +0 Cadj=22µF -10 IOUT=0.1A Vripple=1Vp-p -20 PSRR (dB) -30 -40 -50 -60 VIN-VOUT>=Vdropout -70 -80 -90 -100 10 20 V IN-VOUT>=3V 50 100 200 500 1k 2k 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 V IN R1 RL CONNECT R1 TO CASE R2 V OUT V REF Figure 2. Connections for Best Load Regulation R1 Input Capacitor R2 R2 )+I A D J R 2 R1 An input capacitor of 10µF or greater is recommended. Tantalum, or aluminum electrolytic capacitors can be Figure 1. Basic Adjustable Regulator used for bypassing. Larger Values will improve ripple Load Regulation rejection by bypassing the input to the regulator. When the adjustable regulator is used. Load regula- Output Capacitor tion will be limited by the resistance of the wire connecting the regulator to the load. The data sheet speci- The APL1541 requires an output capacitor to main- fication for load regulation is measured at the output tain stability and improve transient response. Proper pin of the device. Best load regulation is obtained capacitor selection is important to ensure proper when the top of the resistor divider (R1) is tied directly operation. The APL1541 output capacitor selection to the output pin of the device, not to the load. For is dependent upon the ESR (equivalent series fixed voltage devices the top of R1 is internally con- resistance) of the output capacitor to maintain stability. nected to the output, and the ground pin can be con- When the output capacitor is 10uF or greater, the out- nected to low side of the load. If R1 were connected put capacitor should have an ESR less than 1Ω.This to the load, RP is multiplied by the divider ratio, the will improve transient response as well as promote effective resistance between the regulator and the load stability. A low-ESR solid tantalum capacitor works would be: Rp X (1+ APL1541 IN OUT ADJ CONNECT R2 TO LO AD I ADJ 60 µ A V O U T = V R E F (1+ V IN Rp P A R A S IT IC L IN E R E S IS T A N C E extremely well and provides good transient response R2 ), Rp = Parasitic Line Resistance R1 Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 and stability over temperature. 8 www.anpec.com.tw APL1541 Application Information (Cont.) Output Capacitor (Cont.) PD = (VIN - VOUT) x IOUT Maximum junction temperature is equal to : Aluminum electrolytics can also be used, as long as the ESR of the capacitor is <1Ω. The value of the TJUNCTION = TAMBIENT + (PD x θJA) output capacitor can be increased without limit. Higher Note: TJUNCTION must not exceed 125°C capacitance values help to improve transient response and ripple rejection and reduce output noise. Ripple Rejection The curves for Ripple Rejection were generated using an adjustable device with the adjust pin bypassed. With a 22µF 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 100Ω200Ω. The size of the required adjust pin capacitor is a function of the input ripple frequency. At 120Hz, with R1=100Ω, the adjust pin capacitor should be 13µF. 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 150°C. However, device functionality is only guaranteed to a maximum junction temperature of +125°C. 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 E e1 0.015X45 SOP-8 pin ( Reference JEDEC Registration MS-012) H e2 D A1 1 L 0.004max. Dim A Mi ll im et er s Inche s A Min. 1. 35 Max . 1. 75 Min. 0. 053 Max . 0. 069 A1 D E 0. 10 4. 80 3. 80 0. 25 5. 00 4. 00 0. 004 0. 189 0. 150 0. 010 0. 197 0. 157 H L e1 e2 5. 80 0. 40 0. 33 6. 20 1. 27 0. 51 0. 228 0. 016 0. 013 0. 244 0. 050 0. 020 φ 1 Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 1. 27B S C 0. 50B S C 8° 8° 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 (IR/Convection or VPR Reflow) tp TP C ritical Z one T L to T P T e m p e ra tu re R am p-up TL tL T sm ax 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 Average ramp-up rate 3°C/second max. (TL to TP) Preheat - Temperature Min (Tsmin) 100°C - Temperature Mix (Tsmax) 150°C - Time (min to max)(ts) 60-120 seconds Tsmax to TL - Ramp-up Rate Tsmax to TL - Temperature(TL) 183°C - Time (tL) 60-150 seconds Peak Temperature(Tp) 225 +0/-5°C 240 +0/-5°C Time within 5°C of actual Peak 10-30 seconds 10-30 seconds Temperature(tp) Ramp-down Rate 6°C/second max. 6 minutes max. Time 25°C to Peak Temperature Pb-Free Assembly Large Body Small Body 3°C/second max. 150°C 200°C 60-180 seconds 3°C/second max 217°C 60-150 seconds 245 +0/-5°C 250 +0/-5°C 10-30 seconds 20-40 seconds 6°C/second max. 8 minutes max. Note: All temperatures refer to topside of the package. Measured on the body surface. Copyright ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 11 www.anpec.com.tw 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 245°C , 5 SEC 1000 Hrs Bias @ 125 °C 168 Hrs, 100 % RH , 121°C -65°C ~ 150°C, 200 Cycles VHBM > 2KV, VMM > 200V 10ms , Itr > 100mA Carrier Tape t D P Po E P1 Bo F W Ko Ao D1 T2 J C A B T1 Application SOP- 8 A B 330 ± 1 F 5.5± 1 J T1 T2 W P E 62 +1.5 C 12.75+ 0.15 2 ± 0.5 12.4 ± 0.2 2 ± 0.2 12± 0. 3 8± 0.1 1.75±0.1 D D1 Po P1 Ao Bo Ko t 2.0 ± 0.1 6.4 ± 0.1 5.2± 0. 1 2.1± 0.1 .3±0.013 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