FS8853 300mA LDO Linear Regulator General Description Ordering Information FS8853-xx x x The FS8853 is a low-dropout linear regulator that operations in the input voltage range from +2.5V to +9.0V and delivers 300mA output current. Package 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 4.5V with 100mV increment, except FS8853-29Cx which has 2.85V output voltage. 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 FS8853 consists 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 FS8853 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 400mV at 300mA (Typ.) Up to ±35mV output voltage accuracy (VIN≦ 7V) Output Voltage 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 options from 1.3V to 4.5V Small output capacitor Output current limit Thermal overload shutdown protection TO-92, SOT-89 and SOT-23 Package Applications Battery Powered Equipment 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 Note : Mask option output types are available by order only Palmtops Portable Cameras and Video Recorders Reference Voltage Sources Post Regulator for Switching Power Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 1/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator Pin Configurations TO-92 Part No. Pin 1 Pin 2 Pin 3 FS8853 -xxxD IN GND OUT FS8853 GND -xxxE IN OUT FS8853 OUT GND -xxxF IN FS8853 GND OUT -xxxW IN 1 IN FS8853 GND -xxxB FS8853 -xxxK 3 IN GND OUT FS8853 GND -xxxL (BOTTOM VIEW) IN OUT FS8853 OUT GND -xxxI IN FS8853 GND OUT -xxxY IN FS8853 xxxxxxxx 1 2 3 SOT-23 Part No. Pin 1 Pin 2 Pin 3 FS8853 -xxxA 2 SOT-89 Part No. Pin 1 Pin 2 Pin 3 3 ..... GND OUT 3xxx W .... IN OUT FS8853 GND OUT -xxxC IN FS8853 OUT GND -xxxV IN 1 2 Package Marking Information SOT-23 TO-92 & SOT-89 EX：FS8853-33CC EX：FS8853-33CL ..... FS8853 33CLxxxx 3 33 C W .... Top Point：Lot No. Bottom Point：Year w : week, A~Z & A ~ Z xxxx：Date Code EX：FS8853-33PC EX：FS8853-33PL ..... FS8853 33PLxxxx 3 33 C W .... xxxx：Date Code Top Point：Lot No. Bottom Point：Year w : week, A~Z & A ~ Z 4th Digit with Underline : Pb/P Free Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 2/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator Pin Description Part NO. FS8853-xxCA FS8853-xxCB FS8853-xxCC FS8853-xxCV FS8853-xxCD FS8853-xxCE FS8853-xxCF FS8853-xxCW FS8853-xxCK FS8853-xxCL FS8853-xxCI FS8853-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 9.0V. Bypass with a 1µF capacitor to GND. OUT is the output voltage pin. Sources up to 300mA. 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 Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 3/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator Typical Application Circuit FS8853 Absolute Maximum Ratings Input voltage VIN to GND ----------------------------------------------------------------------------------------------------10V 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 Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 4/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator Electrical Characteristics (TA=25℃, unless otherwise noted.) Symbol VIN VOUT Parameter Input Voltage Min 2.5 VOUTVIN=VOUT+0.48V, IOUT=1mA, VIN≦7V 0.035 VIN=VOUT+0.48V, IOUT=1mA, 7V＜VIN VOUT0.042 ≦9V Output Voltage ∆ VOUT Output Voltage Accuracy IMAX Maximum Load Current ILIMIT Current Limit ISC Short-Circuit Current IQ Ground Pin Current VDROP Test Conditions Dropout Voltage Typ VOUT VOUT Max Unit 9.0 VOUT+ 0.035 VOUT+ 0.042 V V V VIN>VOUT+0.48V, VIN≦7V -35 +35 mV VIN>VOUT+0.48V, 7V＜VIN≦9V -42 +42 mV 300 mA 0.6 A VOUT=0V, VIN>VOUT+0.48V ILOAD=0mA to 300mA, VIN=VOUT+0.48V IOUT=1mA 140 160 mA 65 120 µA 1.1 1.3 mV IOUT=100mA 120 145 mV IOUT=300mA 400 480 mV ∆VLINE Line Regulation VOUT+0.48V<VIN<9V, ILOAD=1mA 0.2 0.3 %/V ∆VLOAD Load Regulation IOUT=0mA to 300mA 0.01 0.02 %/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 Co. 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-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator Typical Operating Characteristics (CIN=1µF , COUT=3.3µF, TA=+25℃, unless otherwise noted.) GROUND PIN CURRENT vs. AMBIENT TEMPERATURE 1mA 100mA 200mA 300mA 80 3.5 GROUND PIN CURRENT (µA) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE vs. INPUT VOLTAGE 3 2.5 2 1.5 1 0.5 0 70 60 50 40 30 20 10 0 0 1 2 3 4 5 6 7 8 9 -40 -30 -20 INPUT VOLTAGE (V) -10 0 10 20 30 40 50 60 70 80 AMBIENT TEMPERATURE (℃) *EX：Model FS8853-33Cx DROPOUT VOLTAGE vs. LOAD CURRENT Ron vs. LOAD CURRENT 1.50 500 1.40 400 1.30 Ron(Ω) DROPOUT VOLTAGE (mV) 600 300 200 1.20 1.10 1.00 100 0.90 0 50 100 150 200 250 300 350 400 0.80 LOAD CURRENT (mA) 50 100 150 200 250 300 350 400 LOAD CURRENT (mA) POWER SUPPLY REJECTION RATIO v.s FREQUENCY GND PIN CURRENT vs. LOAD CURRENT -90 -80 70 GROUND PIN CURRENT (µA) PSRR (db) -70 -60 -50 -40 -30 -20 -10 0 0.01 0.1 1 10 100 1000 FREQUENCY (KHz) 60 50 40 30 20 10 0 0 1 50 100 150 200 250 300 350 400 LOAD CURRENT (mA) Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 6/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE GROUND PIN CURRENT vs. INPUT VOLTAGE GROUND PIN CURRENT (µA) OUTPUT VOLTAGE (V) 3.36 3.34 3.32 3.3 3.28 3.26 -40 -30 -20 -10 0 10 20 30 40 50 60 70 140 120 100 80 60 40 20 0 0 80 1 2 3 4 5 6 7 8 AMBIENT TEMPERATURE (℃) OUTPUT NOISE DC to 1MHz (37uVRMS) Iload =300mA LINE TRANSIENT (IOUT=10mA) LINE TRANSIENT (IOUT=0mA) 5.0V 5.0V VOUT 4.0V CIN 1µF COUT 3.3µF VIN 4.0V VOUT CIN 1µF COUT 3.3µF 50mV/div 50mV/div Fortune Semiconductor Co. http://www.fsc.com.tw 10 OUTPUT NOISE to 1MHz (67uVRMS) Iload =0mA VIN 9 INPUT VOLTAGE (V) TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 7/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator LINE TRANSIENT (IOUT=200mA) LINE TRANSIENT (IOUT=100mA) 5.0V VIN 5.0V VIN 4.0V CIN 1µF COUT 3.3µF VOUT 4.0V CIN 1µF COUT 3.3µF VOUT 50mV/div 50mV/div LOAD TRANSIENT LOAD TRANSIENT 100mA 0mA IOUT 200mA IOUT 100mA VOUT VOUT CIN 1µF COUT 3.3µF CIN 1µF COUT 3.3µF 100mV/div 50mV/div LOAD TRANSIENT LOAD TRANSIENT 300mA IOUT 200mA VOUT 300mA IOUT 0mA VOUT CIN 1µF COUT 3.3µF CIN 1µF COUT 3.3µF 100mV/div 50mV/div Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 8/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator Detail Description Current Limit The FS8853 is a low-dropout linear regulator. The device provides preset 2.5V and 3.3V output voltages for output current up to 300mA. Other mask options for special output voltages from 1.3V to 4.5V 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 FS8853 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 FS8853 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 FS8853 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 FS8853-33CL has a preset 3.3V output voltage. Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 The FS8853 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 FS8853. 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 FS8853 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 FS8853 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 FS8853 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 FS8853 uses a SOT-89 package and this 9/13 TD-0405006 Rev. 1.5 FS8853 300mA 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 FS8853 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 Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 10/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator Package Outline SOT-23 Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 11/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator SOT-89 Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 12/13 TD-0405006 Rev. 1.5 FS8853 300mA LDO Linear Regulator TO-92 Fortune Semiconductor Co. http://www.fsc.com.tw TEL : +886-2-2809-4742 FAX: +886-2-2809-4874 13/13 TD-0405006 Rev. 1.5