FS8854 350mA LDO Linear Regulator General Description Ordering Information The FS8854 is a low-dropout linear regulator that operations in the input voltage range from +2.5V to +6.5V and delivers 350mA output current. FS8854-xx x x Package A : SOT-23 B : SOT-23 C : SOT-23 V : SOT-23 D : TO-92 E : TO-92 F : TO-92 W : TO-92 K : SOT-89 L : SOT-89 I : SOT-89 Y : SOT-89 The high-accuracy output voltage is preset at an internally trimmed voltage 2.5V or 3.3V. Other output voltages can be mask-optioned from 1.3V to 5.0V with 100mV increment, except FS8854-29Cx which has 2.85V output voltage. The FS8854 consist of a 1.25V bandgap reference, an error amplifier, and a P-channel pass transistor. Other features include short-circuit protection and thermal shutdown protection. The FS8854 devices are available in TO-92, SOT-89 and SOT-23 packages. Pin Out 1.IN 1.GND 1.GND 1.OUT 1.IN 1.GND 1.OUT 1.GND 1.IN 1.GND 1.OUT 1.GND 2.GND 2.IN 2.OUT 2.GND 2.GND 2.IN 2.GND 2.OUT 2.GND 2.IN 2.GND 2.OUT 3.OUT 3.OUT 3.IN 3.IN 3.OUT 3.OUT 3.IN 3.IN 3.OUT 3.OUT 3.IN 3.IN Temperature Range Features C : Commercial Standard P : Commercial Standard, Lead(Pb) Free and Phosphorous(P) Free Package Low dropout voltage 500mV at 350mA (Typ.) Output Voltage Up to ±35mV output voltage accuracy 13 : 1.3V 14 : 1.4V 15 : 1.5V 16 : 1.6V 17 : 1.7V 18 : 1.8V 19 : 1.9V 20 : 2.0V 21 : 2.1V 22 : 2.2V 23 : 2.3V 24 : 2.4V 25 : 2.5V Preset at 2.5V, 3.3V Mask option from 1.3V to 5.0V Small output capacitor Output current limit Thermal overload shutdown protection TO-92, SOT-89 and SOT-23 Package Applications 26 : 2.6V 27 : 2.7V 28 : 2.8V 29 : 2.85V 30 : 3.0V 31 : 3.1V 32 : 3.2V 33 : 3.3V 34 : 3.4V 35 : 3.5V 36 : 3.6V 37 : 3.7V 38 : 3.8V 39 : 3.9V 40 : 4.0V 41 : 4.1V 42 : 4.2V 43 : 4.3V 44 : 4.4V 45 : 4.5V 46 : 4.6V 47 : 4.7V 48 : 4.8V 49 : 4.9V 50 : 5.0V Note : Mask option output types are available by order only. Battery Powered Equipment Palmtops Portable Cameras and Video Recorders Reference Voltage Sources Post Regulator for Switching Power Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 1/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator Pin Configurations TO-92 Part No. Pin 1 Pin 2 Pin 3 FS8854 -xxxD IN GND OUT FS8854 GND -xxxE IN OUT FS8854 OUT GND -xxxF IN FS8854 GND OUT -xxxW IN Part No. Pin 1 Pin 2 Pin 3 FS8854 -xxxA IN FS8854 GND -xxxB GND OUT IN OUT FS8854 GND OUT -xxxC IN FS8854 OUT GND -xxxV IN 1 2 SOT-89 Part No. Pin 1 Pin 2 Pin 3 FS8854 -xxxK 3 IN GND OUT FS8854 GND -xxxL (BOTTOM VIEW) IN OUT FS8854 OUT GND -xxxI IN FS8854 GND OUT -xxxY IN FS8854 xxCxxxxx 1 2 3 SOT-23 3 ..... 4xxx W .... 1 2 Package Marking Information SOT-23 TO-92 & SOT-89 EX：FS8854-33CC EX：FS8854-33CL ..... FS8854 33CLxxxx 433C ... W Top Point：Lot No. Bottom Point：Year w : week, A~Z & A ~ Z xxxx：Date Code EX：FS8854-33PC EX：FS8854-33PL ..... FS8854 33PLxxxx 433C ... . W Top Point：Lot No. Bottom Point：Year w : week, A~Z & A ~ Z A dot after marking : Pb/P Free Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 xxxx：Date Code 2/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator Pin Description Part NO. FS8854-xxCA FS8854-xxCB FS8854-xxCC FS8854-xxCV FS8854-xxCD FS8854-xxCE FS8854-xxCF FS8854-xxCW FS8854-xxCK FS8854-xxCL FS8854-xxCI FS8854-xxCY Symbol GND Description Ground pin. IN Regulator input pin. OUT Regulator output pin. IN is the regulator input pin. Supply voltage can range from 2.5V to 6.5V. Bypass with a 1µF capacitor to GND. OUT is the output voltage pin. Sources up to 350mA. Bypass with a 3.3µF capacitor to GND. GND provides the reference for all voltages. Functional Block Diagram IN Current Limit Thermal Protection Shutdown Logic OUT R1 1.25V Bandgap Reference R2 GND Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 3/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator Typical Application Circuit FS8854 Absolute Maximum Ratings Input voltage VIN to GND ------------------------------------------------------------------------------------------------------7V Output current limit, I(LIMIT) ------------------------------------------------------------------------------------------------ 0.6A Continuous power dissipation, PD (∆T= TJ -TA = 100°C) SOT-23 ---------------------------------------------------------------------------------------------------------------------------------------- 0.31W SOT-89 ---------------------------------------------------------------------------------------------------------------------------------------- 0.55W TO-92 ---------------------------------------------------------------------------------------------------------------------------------------- 0.55W * The power dissipation values are based on the condition that junction temperature TJ and ambient temperature TA difference is 100°C. Junction Temperature, TJ ----------------------------------------------------------------------------------------------- +155°C Storage temperature range, TSTG ---------------------------------------------------------------------- -55°C to +150°C Operating junction temperature range ---------------------------------------------------------------- -40°C to +125°C Lead temperature (soldering, 10sec) ------------------------------------------------------------------------------- 260°C * Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and function operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 4/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator Electrical Characteristics (TA=25℃, unless otherwise noted.) Symbol VIN VOUT Parameter Test Conditions Input Voltage Output Voltage VIN=VOUT+0.6V, IOUT=1mA ∆ VOUT Output Voltage Accuracy VIN>VOUT+0.6V, VIN≦6.5V IMAX Maximum Load Current ILIMIT Current Limit Min 2.5 VOUT0.035 -35 Typ Max Unit V VOUT 6.5 VOUT+ 0.035 +35 350 V mV mA 0.6 A ISC Short-Circuit Current VOUT=0V, VIN>VOUT+0.6V 140 160 mA IQ Ground Pin Current ILOAD=0mA to 350mA, VIN=VOUT+0.6V 65 90 µA IOUT=100mA 120 145 mV IOUT=300mA 400 480 mV IOUT=350mA 500 600 mV VDROP Dropout Voltage ∆VLINE Line Regulation VOUT+0.6V<VIN<6.5V, ILOAD=1mA 0.2 0.3 %/V ∆VLOAD Load Regulation IOUT=0mA to 350mA 0.02 0.03 %/mA Output Noise F=1Hz to 10KHz, COUT=3.3µF 70 µVRMS Ripple Rejection Thermal Shutdown Temperature Thermal Shutdown Hysteresis F=10KHz, COUT=3.3µF 75 dB 155 °C 20 °C eN PSRR TSD THYS θJA Thermal Resistance Fortune Semiconductor Corp. http://www.fsc.com.tw SOT-23 320 °C/W SOT-89 180 °C/W TO-92 180 °C/W TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 5/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator Typical Operating Characteristics (CIN=1µF , COUT=3.3µF, TA=+25℃, unless otherwise noted.) GROUND PIN CURRENT vs. AMBIENT TEMPERATURE 65 3 60 GROUND PIN CURRENT (µA) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE vs. INPUT VOLTAGE 3.5 2.5 2 1.5 1 1mA 100mA 200mA 350mA 55 50 45 40 35 0.5 30 0 0 1 2 3 4 5 6 -40 7 -30 DROPOUT VOLTAGE vs. LOAD CURRENT 0 10 20 30 40 50 60 70 80 Ron vs. LOAD CURRENT 0.7 1.60 0.6 1.50 1.40 Ron (Ω) 0.5 0.4 0.3 1.30 1.20 1.10 0.2 1.00 0.1 0.90 0.0 50 100 150 200 250 300 350 0.80 400 50 100 LOAD CURRENT (mA) 200 250 300 350 400 GND PIN CURRENT vs. LOAD CURRENT -100 60.00 GROUND PIN CURRENT (µA) -90 -80 -70 -60 -50 -40 -30 -20 -10 58.00 56.00 54.00 52.00 50.00 48.00 46.00 0 0.01 150 LOAD CURRENT (mA) POWER SUPPLY REJECTION RATIO vs. FREQUENCY PSRR (db) -10 AMBIENT TEMPERATURE (℃) INPUT VOLTAGE (V) *EX：Model FS8854-33Cx DROPOUT VOLTTAGE (V) -20 0 0.1 1 10 100 1000 http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 50 100 150 200 250 300 350 400 LOAD CURRENT (mA) FREQUENCY (KHz) Fortune Semiconductor Corp. 1 6/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE GROUND PIN CURRENT vs. INPUT VOLTAGE 3.36 70 GROUND PIN CURRENT (µA) OUTPUT VOLTAGE (V) 80 3.34 60 3.32 50 40 3.3 30 20 3.28 10 3.26 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 0 AMBIENT TEMPERATURE (℃) 1 2 3 4 5 LINE TRANSIENT (IOUT=0mA) 5.0V 4.0V 4.0V VIN CIN 1µF COUT 3.3µF VOUT CIN 1µF COUT 3.3µF VOUT 50mV/div 50mV/div LINE TRANSIENT (IOUT=200mA) LINE TRANSIENT (IOUT=350mA) 5.0V VIN VOUT 5.0V 4.0V 4.0V VIN CIN 1µF COUT 3.3µF CIN 1µF COUT 3.3µF VOUT 50mV/div Fortune Semiconductor Corp. http://www.fsc.com.tw 7 LINE TRANSIENT (IOUT=10mA) 5.0V VIN 6 INPUT VOLTAGE (V) TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 50mV/div 7/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator LOAD TRANSIENT LOAD TRANSIENT 100mA IOUT VOUT 200mA 0mA IOUT 100mA CIN 1µF COUT 3.3µF VOUT CIN 1µF COUT 3.3µF 50mV/div 50mV/div LOAD TRANSIENT LOAD TRANSIENT 350mA IOUT VOUT 200mA CIN 1µF COUT 3.3µF 350mA 0mA IOUT CIN 1µF COUT 3.3µF VOUT 50mV/div Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 100mV/div 8/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator Detail Description Current Limit The FS8854 is a low-dropout linear regulator. The device provides preset 2.5V and 3.3V output voltages for output current up to 350mA. Other mask options for special output voltages from 1.3V to 5.0V with 100mV increment are also available. As illustrated in function block diagram, it consists of a 1.25V reference, error amplifier, P-channel pass transistor and an internal feedback voltage divider. The 1.25V bandgap reference is connected to the error amplifier, which compares this reference with the feedback voltage and amplifies the voltage difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled lower, which allows more current to pass to the output pin and increases the output voltage. If the feedback voltage is too high, the pass-transistor gate is pulled up to decrease the output voltage. The output voltage is feedback through an internal resistive divider connected to OUT pin. Additional blocks include an output current limiter, thermal sensor, and shutdown logic. Internal P-channel Pass Transistor The FS8854 features a P-channel MOSFET pass transistor. Unlike similar designs using PNP pass transistors, P-channel MOSFETs require no base drive, which reduces ground pin current. PNP-based regulators also waste considerable current in dropout when the pass transistor saturates, and use high base-drive currents under large loads. The FS8854 does not suffer from these problems and consumes only 65µA (Typ.) of ground pin current under heavy loads as well as in dropout conditions. Output Voltage Selection The FS8854 output voltage is preset at an internally trimmed voltage 2.5V, 3.3V or can be mask-optioned from 1.3V to 4.5V with 100mV increment. The first two digits of part number suffix identify the output voltage (see Ordering Information). For example, the FS8854-33CL has a preset 3.3V output voltage. Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 The FS8854 also include a fold back current limiter. It monitors and controls the pass transistor’s gate voltage, estimates the output current, and limits the output current within 0.6A. Thermal Overload Protection Thermal overload protection limits total power dissipation in the FS8854. When the junction temperature exceeds TJ = +155°C, a thermal sensor turns off the pass transistor, allowing the IC to cool down. The thermal sensor turns the pass transistor on again after the junction temperature cools down by 20°C, resulting in a pulsed output during continuous thermal overload conditions. Thermal overload protection is designed to protect the FS8854 in the event of fault conditions. For continuous operation, the maximum operating junction temperature rating of TJ = +125°C should not be exceeded. Operating Region and Power Dissipation Maximum power dissipation of the FS8854 depends on the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. The power dissipation across the devices is P = IOUT x (VIN-VOUT). The resulting maximum power dissipation is: PMAX = (TJ θ JC − T A ) (TJ − T A ) = θ JA + θ CA Where (TJ-TA) is the temperature difference between the FS8854 die junction and the surrounding air, θJC is the thermal resistance of the package chosen, and θCA is the thermal resistance through the printed circuit board, copper traces and other materials to the surrounding air. For better heat-sinking, the copper area should be equally shared between the IN, OUT, and GND pins. If the FS8854 uses a SOT-89 package and this 9/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator package is mounted on a double sided printed circuit board with two square inches of copper allocated for “heat spreading”, the resulting θJA is 180°C/W. Based on a maximum operating junction temperature 125°C with an ambient of 25°C, the maximum power dissipation will be: PMAX = (TJ θ JC − T A ) (125 − 25) = = 0.555W + θ CA 180 spreading”. Input-Output Voltage A regulator’s minimum input-output voltage differential, or dropout voltage, determines the lowest usable supply voltage. In battery-powered systems, this will determine the useful end-of-life battery voltage. The FS8854 uses a P-channel MOSFET pass transistor, its dropout voltage is a function of drain-to-source on-resistance (RDS(ON)) multiplied by the load current. VDROPOUT = VIN-VOUT = RDS(ON) x IOUT Thermal characteristics were measured using a double sided board with 1” x 2” square inches of copper area connected to the GND pin for “heat Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 10/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator Package Outline SOT-23 Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 11/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator SOT-89 Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 12/13 TD-0410025 Rev. 1.4 FS8854 350mA LDO Linear Regulator TO-92 Fortune Semiconductor Corp. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 13/13 TD-0410025 Rev. 1.4