Advanced Power Electronics Corp. APE8871 500mA Low Dropout Regulator with Enable FEATURES DESCRIPTION The APE8871 is a high performance positive voltage regulator designed for use in applications requiring very low Input voltage and very low dropout voltage at up to 0.5 amps. It operates with a VIN as low as 1.4V and VPP voltage 5V with output voltage programmable as low as 0.8V. The APE8871 features ultra low dropout, ideal for applications where VOUT is very close to VIN. Additionally, the APE8871 has an enable pin to further reduce power dissipation while shutdown. The APE8871 provides excellent regulation over variations in line, load and temperature. The APE8871 provides a power OK signal to indicate if the voltage level of VO reaches 92% of its rating value. Adjustable Output Low to 0.8V Input Voltage as Low as 1.4V and VPP Voltage 5V 250mV Dropout @ 500mA, VO 1.2V Over Current and Over Temperature Protection Enable Pin Low Reverse Leakage (Output to Input ) Advanced DFN 3x3 Package 2% Output Voltage VO Power OK Signal 1.2V, 1.5V, 1.8V and 2.5V and Adjustable Output Voltage VO Pull Low Resistance when Disable RoHS Compliant The APE8871 is available in the DFN 3x3 package. It is available with 1.2V, 1.5V, 1.8V and 2.5V in-ternally preset outputs that are also adjustable using external resistors. APPLICATIONS Motherboards Peripheral Cards Network Cards Set Top Boxes Notebook Computers DVBT ORDERING INFORMATION ORDER NUMBER MARKING TEMP. RANGE APE8871GN3-ADJ 8871 -40C~+85C APE8871GN3-12 APE8871GN3-15 887A 887B -40C~+85C -40 C~+85C APE8871GN3-18 887C -40 C~+85C APE8871GN3-25 887D -40 C~+85C PIN CONFIGURATION PACKAGE DFN 3x3 TYPICAL APPLICATION CIRCUIT APE8871 10k DFN 3x3 VPP (5V) VPP POK VOUT VEN POK VEN 1 8 2 7 GND ADJ/NC VIN VIN VO VO NC R1 VIN 3 6 VO VPP 4 5 NC CPP 1F C1 10F GND ADJ C2 10F R2 0.8 (R1+R2) Volts R2 R2<120k is recommended VO = 1 200809222 Advanced Power Electronics Corp. APE8871 BLOCK DIAGRAM R2 Sense Select R1 PIN DESCRIPTION PIN NAME FUNCTION 1 2 POK VEN 3 VIN 4 VPP Assert high once VO reaches 92% of its rating voltage. Open-drain output. Enable Input. Pulling this pin below 0.4V turns the regulator off, reducing the quiescent current to a fraction of its operating value. The device will be enabled if this pin is left open. Input voltage. Large bulk capacitance should be placed closely to this pin. A 10F ceramic capacitor is recommended at this pin. Input voltage for controlling circuit. 5 6 7 NC VO ADJ/NC 8 GND Not connected. The power output of the device. A pull low resistance exists when deactivate device by VEN. This pin, when it sets the output voltage by the internal feedback resistors, is NC pin. If external feedback resistors are used, the output voltage will be VO = 0.8(R1+R2)/R2 Volts. Reference ground. DEFINITIONS Dropout Voltage The input/output Voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output drops 2% below its nominal value, dropout voltage is affected by junction temperature, load current and minimum input supply requirements. Line Regulation The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Load Regulation The change in output voltage for a change in load current at constant chip temperature. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Maximum Power Dissipation The maximum total device dissipation for which the regulator will operate within specifications. Quiescent Bias Current Current which is used to operate the regulator chip and is not delivered to the load. Layout Consideration The output capacitors must be located as close to the VOUT terminal of the device as possible. It is recommended to use a section of a layer of the PC board as a plane to connect the VOUT pin to the output capacitors to prevent any high frequency oscillation that may result due to excessive trace inductance. 2 Advanced Power Electronics Corp. APE8871 ABSOLUTE MAXIMUM RATINGS (Note 1) VPP, VIN, Input Voltage. . . . . . . . . . . . . . . . . . . . . . . 6.5V Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature. . . . . . . . . . . . . 150C Storage Temperature Range. . . . . . -65C TJ +150C Thermal Resistance Junction to Ambient, (JA) DFN 3x3. . . . . . . . . . . . . . . . . . . . .150C/W Thermal Resistance Junction to Case, (JC) DFN 3x3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .40C/W ESD Rating (Human Body Model) . . . . . . . . . . . . 2kV OPERATION CONDITIONS VIN Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 1.4V ~5.5V VPP Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V~5.5V Vout Voltage. . . . . . . . . . . . . . . . . . . . . .0.8V~2.7V Temperature Range. . . . . . . . . . . . -40C TA +85C ELECTRICAL CHARACTERISTICS VPP=5V, VIN =VO+0.5V, VEN=VPP, IO=10mA, CIN=10F, COUT =10F, TA=TJ=25C unless otherwise specified. (Note 3) PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT 1.4 --- --100 5.5 300 V uA VIN Input Voltage Range Quiescent Current (Ground Current) VPP VPP Voltage Range VIN IQ VO=1.8V, IO=0mA VPP 4.5 --- 5.5 V ----- 0.23 5 0.5 6 mA mA --- --- 1 A 1.764 1.8 1.836 V IPPL IO=0mA IO=0.5A VEN=0V VO VIN=VO+0.5V,VO=1.8V Line Regulation VIN=(VO+0.5V) to 5V --- 0.2 1 % Load Regulation Dropout Voltage Short Circuit Current VD 10mA<IO<0.5A I O=500mA ------- 0.2 200 3 1 250 --- VEN=0V --- 90 --- % mV A VADJ=VO VPP Current IPPH VO Output Voltage (Internal Fixed Voltage) VO Pull Low Resistance ADJ Reference Voltage VREF 0.788 0.8 0.812 V Adjust Pin Current IADJ --- 20 100 nA VEN Pin Voltage High VENH 1.6 --- --- V VEN Pin Voltage Low VENL VEN Pin Bias Current POK IENH VEN VEN=0V --- --- 0.4 V --- 12 20 A VO Power OK Voltage Hysteresis Over Temperature Protection VTHPOK VHYPOK ----- 92 7 ----- % % Over Temperature Over Temperature Hysteresis TOT TOTHY ----- 150 30 ----- C C Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics. Note2: The maximum power dissipation is a function of the maximum junction temperature, TJmax ; total thermal resistance, JA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is (Tjmax-TA) / JA. If this dissipation is exceeded, the die temperature will rise above 150C and IC will go into thermal shutdown. Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 3 Advanced Power Electronics Corp. APE8871 POWER SEQUENCE DIAGRAM POWER ON SEQUENCE Vpp Vin EN OUT POWER OFF SEQUENCE EN OUT Vin Vpp 4 Advanced Power Electronics Corp. APE8871 TYPICAL PERFORMANCE CHARACTERISTICS Quiescent Current vs. Input Voltage Quiescent Current vs. Temperature 300 Quiescent Current (uA) Quiescent Current (uA) 300 2.4V 250 0.9V 200 1.8V 1.2V 1.5V 150 100 50 0 250 200 150 100 50 0 1.5 2 2.5 3 3.5 4 4.5 5 5.5 -40 -20 0 Input Voltage (V) 40 60 80 100 80 100 Vpp Current vs. Temperature 500 500 400 400 Vpp Current (uA) Vpp Current (uA) Vpp Current vs. Input Voltage 300 200 100 300 200 100 0 0 1.5 2 2.5 3 3.5 4 4.5 5 -40 5.5 -20 0 20 40 60 Temperature () Input Voltage (V) Output Voltage vs. Input Voltage Output Voltage vs. Load Current 1.22 Output Voltage (V) 1.22 Output Voltage (V) 20 Temperature () 1.21 1.2 1.19 1.18 1.21 1.2 1.19 1.18 1.5 2 2.5 3 3.5 4 Input Voltage (V) 4.5 5 5.5 0 0.1 0.2 0.3 0.4 0.5 Load Current (A) 5 Advanced Power Electronics Corp. APE8871 TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage vs. Temperature Reference Voltage vs. Input Voltage 0.812 Reference Voltage (V) Output Voltage (V) 1.22 1.21 1.2 1.19 1.18 0.808 0.804 0.8 0.796 0.792 0.788 -40 -20 0 20 40 60 80 100 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage (V) Temperature () Reference Voltage vs. Temperature Reference Voltage (V) 0.812 0.808 0.804 0.8 0.796 0.792 0.788 -40 -20 0 20 40 60 80 100 Temperature () 6 Advanced Power Electronics Corp. APE8871 TYPICAL PERFORMANCE CHARACTERISTICS Short Circuit Current Load Transient Vin Start up Waveform Vin OFF Waveform Enable Sequence Shutdown Sequence 7 ADVANCED POWER ELECTRONICS CORP. Package Outline : DFN (3x3) Millimeters SYMBOLS MIN NOM MAX A A1 0.80 0.90 1.00 0.00 0.02 0.05 b 0.25 0.30 0.35 C __ 0.2 REF __ D 2.9 3.00 3.1 D2 1.65 1.70 1.75 E 2.9 3.00 3.1 E2 1.95 2.00 2.05 e __ 0.65 __ L 0.3 0.35 0.4 y 0 __ 0.08 1.All Dimension Are In Millimeters. 2.Dimension Does Not Include Mold Protrusions. Part Marking Information & Packing : DFN (3x3) 887X YWWS Part Number : 887 Output Voltage : 1 : Adj A : 1.2V C : 1.8V B : 1.5V D : 2.5V Date Code (YWWS) YLast Digit Of The Year WWWeek SSequence 8