APL5901/2ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advisecustomers to obtain the latest version of relevant information to verify before placing orders.FeaturesApplications• Notebook Computer• PDA or Portable Equipments• Noise-Sensitive Instrumentation Systems• Low Noise : 50µV RMS (100Hz to 100kHz)• Low Quiescent Current : 50µA (No load)• Low Dropout Voltage : 210mV (@900mA)• Very low Shutdown Current : < 1µA • Fixed Output Voltage : 1.3V ~ 3.4V • Stable with 4.7µF Output Capacitor• Stable with Aluminum , Tantalum or Ceramic Capacitors .• Reverse Current Protection • No Protection Diodes Needed • Built in Thermal Protection• Built in Current Limit Protection• Controlled Short Circuit Current : 200mA • Fast Transient Response • Short Setting Time• SOT-89, SOT-89-5, SOT-223, SO-8 ,TO-252 and TO-252-5 Packages• Lead Free Available (RoHS Compliant)Pin ConfigurationSOT-89 (Top View)V IN G N D V O U T123T A B i s G N DSO-8 (T op View)SOT-223 (T op View)V OUTGND V IN 123TAB is GNDTO-252-5 (T op View)TAB is GND123V OUTV IN General DescriptionThe APL5901/2 is micropower, low noise, low dropout linear regulator. Operate from 2.7V to 6V input voltage and deliver up to 900mA. Typical output noise is just 50µV RMS with the addition of an external 0.1µF bypass capacitor in BP pin and typical dropout voltage is only 210mV at 900mA loading. Designed for use in bat-tery-powered system, the low 50µA quiescent cur-rent makes it an ideal choice.TO-252 (Top View)APL5901BP V O U T G N D V INT A B i s G N DS H D N SOT-89-5 (T op View)V INGND V OUT SHDNDesign with an internal P-channel MOSFET pass transistor, the APL5901/2 maintains a low supply current, independent of the load current and dropout voltage. Other features include reverse current protection, thermal-shutdown protection, current limit protection to ensure specified output current and con-trolled short-circuit current. The APL5901/2 regulator come in a miniature SOT-89, SOT-89-5, SOT-223, SO-8, TO-252 and TO-252-5 packages.APL5901/213APL5901/2Pin DescriptionOrdering and Marking InformationPin Configuration (Cont.)SOT-223 (T op View)V INV OUT GND 123TAB is V OUTAPL5902Note1 : These pins do not exist in 3-pin package.Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate termina-tion finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering operations.ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for MSL classifica-tion at lead-free peak reflow temperature.APL5901/2Unless otherwise noted these specifications apply over full temperature, V IN =3.6V, C IN =1µF, C OUT =4.7µF,SHDN=V IN , T =0 to 125°C. Typical values refer to T J =25°C.Absolute Maximum RatingsElectrical CharacteristicsAPL5901/2Application CircuitVOUTFElectrical Characteristics (Cont.)IN OUT OUT OUT IN OUT Note 3 : For 5-pin devices only.Unless otherwise noted these specifications apply over full temperature, V IN =3.6V, C IN =1µF, C OUT =4.7µF,IN , T J =0 to 125°C. Typical values refer to T J =25°C.APL5901/200.511.522.533.501234560501001502002503003500123456050100150200250300350400015030045060075090000.511.522.533.544.555.56Typical CharacteristicsInput Voltage (V)C u r r e n t L i m i t (m A )G r o u n d P i n C u r r e n t v s . L o a d C u r r e n t (u A )Output Current (mA)Input Voltage (V)G r o u n d P i n C u r r e n t v s . L o a d C u r r e n t (u A )Input Voltage (V)O u t p u t V o l t a g e (V )APL5901/2+0-90-80-70-60-50-40-30-20-1020200k501002005001k2k5k10k20k50k100k0.40.50.60.70.80.913 3.54 4.55 5.56-12-10-8-6-4-200.51 1.52 2.53 Typical CharacteristicsSHDNThresholdVoltage(V)Input Voltage (V)Frequency (H Z)PSRR(dB)OutputCurrent(uA)Output Voltage (V)APL5901/205010015020025030035040045050000.10.20.30.4020u 40u10m2m4m6m8mTypical CharacteristicsTime (s)V O U T (50u V /d i v )O u t p u t N o i s e (u V )Bypass Capacitor (uF)Load-Transient ResponseO u t p u t V o l t a g e (50m V /d i v )Time (10µs/div)V OUT I OUT =1mA~900mATime (40µs/div)V OUTV INLine-Transient ResponseV IN =V OUT +1V C OUT =4.7µFO u t p u t V o l t a g e (20m V /d i v )APL5901/2-33APL5901/2-334V 3VAPL5901/20.0010.010.11150300450600750900V OUTC OUT =1µF No LoadTypical CharacteristicsEntering ShutdownTime (1ms/div)V OUTv SHDNShutdown Exit DelayTime (20ms/div)V OUTvSHDNC BP =100nF No LoadTime (200ms/div)Region of Stable ESR vs. Load CurrentLoad Current (mA)C O U T E S R (Ω)Shutdown Exit DelayAPL5901/2-33APL5901/2-33APL5901/2-333.3V4V3.3V4V0V0V0V0V3.3V4V0V0VC BP =10nF No LoadAPL5901/23.253.273.293.313.333.35-404080120Typical CharacteristicsOutput Voltage vs. TemperatureTemperature (°C )O u t p u t V o l t a g e (V)APL5901/2The minimum input-output voltage difference (dropout)determines the lowest usable supply voltage. In bat-tery-powered systems, this will determine the useful end-of-life battery voltage. Because the APL5901/2use a p-channel MOSFET pass transistor, the drop-out voltage is a function of drain-to-source on-resis-tance (R DS(ON)) multiplied by the load current.The APL5901/2 load-transient response graphs in typi-cal characteristics show the transient response. A step change in the load current from 10mA to 900mA at 10µs will cause a 20mV transient spike. Larger output capacitor and lower ESR can reduce transient spike.Application InformationCapacitor Selection and Regulator StabilityThe APL5901/2 use at least a 1µF capacitor on the input, and this capacitor can be Aluminum, Tantalum or Ceramic capacitor. The input capacitor with larger value and lower ESR provides better PSRR and line-transient response. The output capacitor also can use Aluminum, T antalum or Ceramic capacitor, and a mini-mum value of 4.7µF and ESR above 0.02Ω is recommended. A larger output capacitor can reduce noise and improve load-transient response, stability,and PSRR. Note that some ceramic dielectrics ex-hibit large capacitance and ESR variation with temperature. When using this capacitor, a minimum 10uF or more may be required to ensure the stability at low temperature operation. Use a bypass capaci-tor at BP pin for low output nvise. Increasing the ca-pacitance will slightly decrease the output noise, but increase the start-up time.Load-Transient ConsiderationsInput-Output (Dropout)VoltageReverse Current ProtectionThe APL5901/2 have an internal reverse protection, it does not need an external schottky diode to connect the regulator input and output. If the output voltage is forced above the input voltage by more than 11mV,the IC will be shutdown and the ground pin current is below 0.1uA.Current LimitThe APL5901/2 have a current limit protection. The ouptut voltage will drop close to zero volt, when load current reaches the limit, and then the load current will be limited at 200mA after output voltage is below 0.7V. When the load current back to the value where limiting started, the output voltage and current will re-turn to normal value. When output is shorted to ground, the APL5901/2 will keep short circuit current at 200mA .Shutdown/EnableThe APL5901/2 have an active high enable function.Force EN high (>1.6V) enables the regulator, EN low (<0.4V) disables the regulator and enter the shutdown mode. In shutdown mode, the quiescent current can reduce below 1uA. The EN pin cannot be floating, a floating EN pin may cause an indeterminate state on the output. If it is no use, connect to V IN for normal operation.APL5901/2Thermal protection limits total power dissipation in the device. When the junction temperature exceeds T J =+150¢J, the thermal sensor generates a logic sig-nal to turn off the pass transistor and allows IC to cool. When the IC’s junction temperature is down by 10¢J, the thermal sensor will turn the pass transistor on again, resulting in a pulsed output during continu-ous thermal protection. Thermal protection is designed to protect the APL5901/2 in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction temperature of T J =+150¢J.Operating Region and Power Dis-sipationThe thermal resistance of the case to circuit board,and the rate of air flow all control the APL5901/2’s maximum power dissipation. The power dissipation across the device is P D = I OUT (V IN -V OUT ) and the maxi-mum power dissipation is:P DMAX = (T J -T A ) / (£c JC +£c CA )where T J -T A is the temperature difference between the junction and ambient air, £c JC is the thermal resis-tance of the package, and £c CA is the thermal resis-tance through the printed circuit board, copper traces,and other materials to the ambient air.The GND pin of the APL5901 provide an electrical con-nection to ground and channeling heat away. If power dissipation is large, connect the GND pin to ground using a large pad or ground plane, can improve the problem of over heat of IC.Thermal ProtectionAPL5901/2Packaging Information5SOP-8 pin ( Reference JEDEC Registration MS-012)APL5901/2Packaging InformationSOT-223( Reference JEDEC Registration SOT-223)bAPL5901/2Packaging InformationSOT-89 (Reference EIAJ ED-7500A Reg stration SC-62)APL5901/2 Packaging Information SOT-89-5APL5901/2Packaging InformationTO-252-5APL5901/2TO-252( Reference JEDEC Registration TO-252)Packaging InformationAPL5901/2Physical SpecificationsT LT P25T e m p e r a t u r eTimeReflow Condition (IR/Convection or VPR Reflow)Classificatin Reflow Profiles(mm)APL5901/2Carrier Tape & Reel DimensionsReliability Test ProgramClassification Reflow Profiles(Cont.)APL5901/2Reel DimensionsCarrier Tape & Reel Dimensions(Cont.)Cover Tape DimensionsCopyright © ANPEC Electronics Corp.Rev. B.2 - May., 2005APL5901/221Anpec Electronics Corp.Head Office :5F, No. 2 Li-Hsin Road, SBIP,Hsin-Chu, Taiwan, R.O.C.T el : 886-3-5642000Fax : 886-3-5642050Taipei Branch :7F, No. 137, Lane 235, Pac Chiao Rd.,Hsin Tien City, Taipei Hsien, T aiwan, R. O. C.T el : 886-2-89191368Fax : 886-2-89191369Customer Service元器件交易网。
