Advanced Power Electronics Corp. APE8876 1.6X LINEAR FAN DRIVER WITH VOUT FULLY ON CONTROL FEATURES DESCRIPTIOON Low Dropout Voltage: [email protected] VO Follows 1.6 Times of VSET FON Pin to Turn VO Fully On Stable with Low ESR Ceramic Capacitors Current-Limit and Thermal Shutdown Protection TSOT-26 & SO-8 Pb-Free Package The APE8876 is a low dropout linear regulator which is designed to power a DC fan and delivers up to 600mA output current. The output voltage follows the 1.6 times of VSET voltage and typical dropout voltage is only 200mV (typical) at 600mA output current. The VSET voltage can form 0.1V to 3.3V to guarantee VOUT 1.6 times of VSET. A FON pin turns VOUT output fully on when given low. The features of current limit (with fold back current) and over temperature protection protect the device against current over-loads and over temperature. The APE8876 is available in a TSOT-26 & SO-8 package. TYPICAL APPLICATION U1 VOUT=1.6 X VSET VIN=5V VIN VSET VO VSET C2 C1 FON FON GND FAN 2.2uF 2.2uF APE8876 ORDERING / PACKAGE INFORMATION APE8876X Package Type TY : TSOT-26 M : SO-8 ( Top View ) (Top View) VOUT 1 6 VSET GND 2 5 GND VIN 3 4 FON TSOT-26 Data and specifications subject to change without notice FON 1 8 GND VIN 2 7 GND VOUT 3 6 GND VSET 4 5 GND SO-8 1 201103042 Advanced Power Electronics Corp. APE8876 ABSOLUTE MAXIMUM RATINGS (at TA=25oC) VIN Supply Voltage (VIN) -------------------------- -0.3 to 6.5V FON Voltage (VFON) --------------------------------- -0.3 to VIN VSET Voltage (VSET) ------------------------------- -0.3 to VIN Power Dissipation (PD) ----------------------------- Internally limited Storage Temperature Range (TST) -------------- -65 to +150°C Junction Temperature Range (TJ) -------------- -40 to +125°C Operating Temperature Range (TOP) ----------- -40 to +85°C Thermal Resistance from Junction to Case(Rth JC) TSOT-26 50°C/W SO-8 25°C/W Thermal Resistance from Junction to Ambient(RthJA) TSOT-26 SO-8 100°C/W 70°C/W Note: RthJA is measured with the PCB copper area approximately 1.5 in2 (Multi-layer) that connect to GND Pins. ELECTRICAL SPECIFICATIONS (VSET = 2V, VIN = 5V, IOUT = 0.5A, CIN=COUT=2.2uF, TA=25oC unless otherwise specified) Parameter SYM MIN TYP MAX UNITS 4.5 - 6 V - 50 80 uA VO/VSET VIN=5.5V, VSET=1V~3.3V 1.552 1.6 1.648 V/V Line Regulation VIN=4.5V to 5.5V - 0.2 0.5 % Load Regulation IOUT =10mA ~ 0.6A - 30 60 mV IOUT =0.6A, VSET=3.3V - 200 320 mV 700 - - mA - 250 - mA 0.1 - 3.3 V VSET=5V - 80 200 nA VFON-H Normal Operating 2 - - V VFON-L Regulator Fully On - - 0.8 V IFONH FON = VIN - 0.003 0.1 FON = 0V - 1 5 - 150 - °C - 30 - °C VIN Supply Voltage Range VIN Quiescent Current ICCQ Output Voltage/VSET Voltage Dropout Voltage VDrop Current Limit ILimt Short Circuit Current IShort VSET Voltage Range VSET VSET Pin Current ISET FON Pin Logic Threshold Voltage FON Pin Bias Current Thermal Shutdown Temp Thermal Shutdown Hysteresis IFONL TSD TEST CONDITION No Load Vo<0.6V μA 2 Advanced Power Electronics Corp. APE8876 PIN DESCRIPTIONS PIN SYMBOL VIN PIN DESCRIPTION IC power supply pin. FON Input. Pulling this pin below 0.4V turns the regulator fully on. FON Internally pulled high. This pin sets the output voltage. Its voltage can form 0.1V to 3.3V to guarantee VSET VOUT 1.6 times of VSET GND Ground Pin VOUT Output Pin. Its voltage is 1.6 times of VSET BLOCK DIAGRAM VOUT VIN Current Limit and Short Protection - + Error Amp Thermal Shutdown FON VO Fully On Logic GND VSET FUNCTION DESCRIPTIONS Output Voltage Regulation The Output Voltage is set by VSET voltage. VOUT output voltage follows the 1.6 times of VSET voltage until it reaches VIN voltage. Fully-On Control If the FON pin logic level smaller than 0.8V, the output voltage can be promoted near to VIN voltage. Otherwise, VOUT is normal operating by FON larger than 2.0V. 3 Advanced Power Electronics Corp. APE8876 FUNCTION DESCRIPTIONS Current-Limit The APE8876 monitors the current via the output PMOS and limits the maximum current to prevent load and APE8876 from damages during overload or short circuit conditions. Short Current Protection When the output voltage drops below 0.6V (typical), which is caused by over load or short circuit, the fold back current limit circuitry limits the output current to 250mA. The fold back current limit is used to reduce the power dissipation during short circuit condition. Thermal Shutdown A thermal shutdown circuit limits the junction temperature of APE8876. When the junction temperature exceeds +150°C, a thermal sensor turns off the output PMOS, allowing the device to cool down. The regulator regulates the output again through initiation of a new soft-start cycle after the junction temperature cools by 30°C, resulting in a pulsed output during continuous thermal overload conditions. APPLICATION INFORMATION Capacitor Selection Normally, use a 2.2µF capacitor on the input and a 2.2µF capacitor on the output of the APE8876. In order to insure the circuit stability, the proper output capacitor value should be larger than 1uF. With X5R and X7R dielectrics, 2.2uF is sufficient at all operating temperatures. Thermal Considerations The APE8876 series can deliver a current of up to 600mA over the full operating junction temperature range. However, the maximum output current must be dated at higher ambient temperature to ensure the junction temperature does not exceed 125° C. With all possible conditions, the junction temperature must be within the range specified under operating conditions. Power dissipation can be calculated based on the output current and the voltage drop across regulator. PD = (VIN - VOUT) IO The final operating junction temperature for any set of conditions can be estimated by the following thermal equation: PD (MAX) = (TJ (MAX) - TA) / RthJA Where T J (MAX) is the maximum junction temperature of the die (125°C) and T A is the maximum ambient temperature. The junction to ambient thermal resistance (RthJA) for TSOT-26 package at recommended minimum footprint is 100°C/W. 4 Advanced Power Electronics Corp. APE8876 FUNCTION DESCRIPTIONS PCB Layout 1. Please place the input capacitors close to the VIN 2. Ceramic capacitors for load must be placed near the load as close as possible 3. To place APE8876 and output capacitors near the load is good for performance. 4. Large current paths that VIN and Output lines must have wide tracks. 5. GND connect large copper area can reduced IC temperature. PCB Layout Guide (Top View) (Bottom View) 5 Advanced Power Electronics Corp. APE8876 TYPICAL PERFORMANCE CHARACTERISTICS 6 Advanced Power Electronics Corp. APE8876 TYPICAL PERFORMANCE CHARACTERISTICS Line Transient Line Transient Fully ON 7 Advanced Power Electronics Corp. APE8876 TYPICAL PERFORMANCE CHARACTERISTICS Power ON 8 Advanced Power Electronics Corp. APE8876 MARKING INFORMATION TSOT-26 HDYWS Part Number : HD Week: A~Z : 01~26 a~z : 27~52 ID Code : Internal Year : A = 2010 1 = 2011 ： ： SO-8 Part Number Package Code 8876M YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence 9 Advanced Power Electronics Corp. APE8876 PACKAGE OUTLINES TSOT-26 θ D L E1 E L1 R b e y A1 A A2 e1 C L2 Dimensions in Millimeters Min. Nom. Max. A 1.10 A1 0.00 0.10 A2 0.70 0.90 1.00 b 0.30 0.40 0.50 C 0.08 0.14 0.20 D 2.80 2.90 3.00 E 2.60 2.80 3.00 E1 1.50 1.60 1.70 e 0.95 BSC. e1 1.90 BSC. L 0.30 0.45 0.60 L1 0.60 REF. L2 0.25 BSC. y 0.10 R 0.10 o θ 0 8o JEDEC outline: MO-193 AA Symbol Dimensions in Inches Min. Nom. Max. 0.043 0 0.004 0.028 0.035 0.039 0.012 0.016 0.020 0.003 0.006 0.008 0.110 0.114 0.118 0.102 0.110 0.118 0.059 0.063 0.067 0.037 BSC. 0.075 BSC. 0.012 0.018 0.024 0.024 REF. 0.010 BSC. 0.004 0.004 o 0 8o