APL1541-33KC-TRL

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 Min. 1.225 3.235 APL1541 Typ. Max. 1.250 3.300 1.275 3.365 Unit V V Reference Voltage 10mA≤ IOUT ≤1A, 1.4V≤(VIN -VOUT) ≤9.75V, APL1541 TJ =0~125°C Output Voltage TJ =0~125°C, APL1541-33 0≤ IOUT≤ 1A, 4.75V≤ VIN≤12V, 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 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 Parameter Current Limit Test Conditions (VIN -VOUT)=5V, TJ=25°C Min. 1 APL1541 Typ. Max. 60 0.2 120 5 µA Unit A µA 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 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 IN AP L1541 OUT R1 121Ω 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 121Ω 150uF R2 365Ω 1% TTL C1 10uF VOUT V IN IN AP L1541 OUT 121Ω 1% 100uF 365Ω 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 0.1 Input Voltage (V) 3 2.5 2 1.5 1 0.5 0 -100 100 300 500 700 CIN=10µF COUT=10µF Tantalum V IN=5V 0 4 3 2 CIN=10µF COUT=10µF Tantalum IOUT=0.1A 0.05 -0.01 -0.02 0 1 0 -20 30 80 130 -0.05 180 -0.03 900 Time (µS) Time (µS) 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 (µA) -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) V IN-V OUT =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=22µF -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 V IN-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 I ADJ 60 µ A 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 V REF R1 Figure 2. Connections for Best Load Regulation Input Capacitor R2 V O U T = V R E F (1+ R2 )+I A D J R 2 R1 An input capacitor of 10µF 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: Rp X (1+ R2 ), Rp = Parasitic Line Resistance R1 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 1Ω.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 Copyright  ANPEC Electronics Corp. Rev. A.2 - Oct., 2003 APL1541 Application Information (Cont.) Output Capacitor (Cont.) Aluminum electrolytics can also be used, as long as the ESR of the capacitor is 2KV, VMM > 200V 10ms , Itr > 1 00mA 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 1.75 ±0.1 t .3 ±0.013 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