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REV. 2.7 FS8853-DS-27_EN MAY 2014 Datasheet FS8853 300 mA LDO Linear Regulator FORTUNE' Properties For Reference Only
Rev. 2.7 2/15 Fortune Semiconductor Corporation 富晶電子股份有限公司 Danshui Town, Taipei County 251, Taiwan Tel.：886-2-28094742 Fax：886-2-28094874 www.ic-fortune.com This manual contains new product information. Fortune Semiconductor Corporation reserves the rights to modify the product specification without fu rther notice. No liab ility is assumed by Fortune Semiconductor Corporation as a result of the use of this product. No rights under any patent accompany the sale of the product. FORTUNE' Properties For Reference Only
Rev. 2.7 3/15 1. General Description 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. The high-accuracy output voltage is preset at an internally trimmed voltage 1.8V to 3.3V. Other output voltages can be mask-optioned from 1.5V to 5.0V with 100mV increment. The FS8853 consists of a 1.25V bandgap reference, an error amplifier, and a P-channel pass transistor. Other features include s hort-circuit protection and thermal shutdown protection. The FS8853 devices are available in SOT-89 and SOT-23 packages. 2. Features z Low dropout voltage 400mV at 300mA (Typ.) z Up to ±35mV output voltage accuracy (VIN≦7V) z Preset at 1.8V, 3.3V z Mask options from 1.5V to 5.0V z Quiescent current 30µA at 5V input (Typ.) z Small output capacitor z Output current limit z Thermal overload shutdown protection z SOT-89 and SOT-23 Package 3. Applications z Battery Powered Equipment z Palmtops z Portable Cameras and Video Recorders z Reference Voltage Sources z Post Regulator for Switching Power 4. Ordering Information FS8853-xx x x P a c k a g e P i n O u t C : S O T - 2 3 1 . G N D 2 . O U T 3 . I N L : S O T - 8 9 1 . G N D 2 . I N 3 . O U T I : S O T - 8 9 1 . O U T 2 . G N D 3 . I N P a c k a g e T y p e G : G stands for Green-Package O u t p u t V o l t a g e 15 : 1.5V 1 8 : 1 . 8 V 2 5 : 2 . 5 V 28 : 2.8V 30 : 3.0V 33 : 3.3V 36 : 3.6V Note: Mask option output types are available by order only FORTUNE' Properties For Reference Only
Rev. 2.7 4/15 5. Pin Configurations 6. Package Marking Information SOT-23 SOT-89 EX：FS8853-33GC Top Point：Lot No. Bottom Point：Year w : week, A~Z & A ~ Z EX：FS8853-33GL xxxx：Date Code FS8853 xxxxxxxx 1 2 3 SOT-89 Part No. Pin 1 Pin 2 Pin 3 FS8853 -xxGL GND IN OUT FS8853 -xxGI OUT GND IN FS8853 33GLxxxx 333C . . . W Part No. Pin 1 Pin 2 Pin 3 FS8853 -xxGC GND OUT IN SOT-23 3xxG W. . . . FORTUNE' Properties For Reference Only
Rev. 2.7 5/15 7. Pin Description Part NO. Symbol Description FS8853-xxGC FS8853-xxGL FS8853-xxGI GND Ground pin that provides the reference for all voltages. IN Regulator input pin. Supply voltage can range from 2.5V to 9.0V. Bypass with a 1µF capacitor to GND. OUT Regulator output pin. Sources up to 300mA. Bypass with a 3.3µF capacitor to GND. 8. Functional Block Diagram 1.25V Bandgap Reference Thermal Protection Current Limit Shutdown Logic 9. Typical Application Circuit IN GND OUT FORTUNE' Properties For Reference Only
Rev. 2.7 6/15 10. Absolute Maximum Ratings Continuous power dissipation, PD (ΔT= TJ -TA = 100°C) SOT-23 SOT-89 * The power dissipation values are based on the condition that ju nction temperature T J and ambient temperature TA difference is 100°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' Properties For Reference Only
Rev. 2.7 7/15 11. Electrical Characteristics (TA=25℃, unless otherwise noted.) Symbol Parameter Test Conditions Min Typ Max Unit VIN Input Voltage 2.5 7.0 V VOUT Output Voltage VIN=VOUT+0.48V, IOUT=1mA, VIN≦ VOUT- 2.0% VOUT VOUT +2.0% V IMAX Maximum Load Current 300 mA ILIMIT Current Limit 0.6 A ISC Short-Circuit Current VOUT=0V, VIN=5.0V 300 350 mA IQ Ground Pin Current IOUT=0mA to 300mA, VIN=5.0V 30 50 µA VDROP Dropout Voltage IOUT=1mA 1.1 1.3 mV IOUT=100mA 120 145 mV IOUT=300mA 400 480 mV ∆VLINE Line Regulation VOUT+0.48V <VIN<9V, IOUT=1mA 0.2 0.3 %/V ∆VLOAD Load Regulation IOUT=0mA to 300mA 0.01 0.02 %/mA eN Output Noise F=1Hz to 10KHz, COUT=3.3µF, IOUT=0mA 70 µVR MS PSRR Ripple Rejection F=1KHz, COUT=3.3µF 70 dB TSD Thermal Shutdown Temperature 155 °C THYS Thermal Shutdown Hysteresis 10 °C θJA Thermal Resistance SOT-23 320 °C/W SOT-89 180 °C/W FORTUNE' Properties For Reference Only
Rev. 2.7 8/15 12. Typical Operating Characteristics (VIN=5.0V, CIN=1µF, COUT=3.3µF, TA=+25 , ℃ FS8853-33PL tested, unless otherwise noted.) Output Voltage vs. Input Voltage 0.5 1.5 2.5 3.5 0123456789 Input Voltage (V) Output Voltage (V) Dropout Voltage vs. Output current 100 200 300 400 500 0 50 100 150 200 250 300 350 400 Output Current (mA) Dropout Voltage (mV) Power Supply Rejection Ratio vs. Frequency 0.01 0.1 1 10 100 Frequency (kHz) PSRR (dB) Ground Pin Current vs. Temperature 24.5 25.0 25.5 26.0 26.5 27.0 27.5 28.0 - 4 0 - 2 00 2 04 06 08 0 Temperature (°C) Ground Pin Current (µ A) 1mA 100mA 200mA 300mA Ron vs. Output current 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 0 50 100 150 200 250 300 350 400 Output Current (mA) Ron ( Ω) Ground Pin Current vs. Output Current 25.4 25.45 25.5 25.55 25.6 25.65 25.7 25.75 25.8 0 50 100 150 200 250 300 350 400 Output Current (mA) Ground Pin Current (uA) FORTUNE' Properties For Reference Only
Rev. 2.7 9/15 Output Voltage vs. Temperature 3.25 3.27 3.29 3.31 3.33 3.35 -40 -20 0 20 40 60 80 Temperature (°C) Output Voltage (V) Output Noise DC to 1MHz (60.9µVRMS), IOUT=0mA Line Transient (IOUT=1mA, VIN=4V-5V) Output Noise DC to 1MHz (371 µVRMS), IOUT=300mA Line Transient (IOUT=10mA, VIN=4V-5V) FORTUNE' Properties For Reference Only
Rev. 2.7 10/15 Line Transient (IOUT=100mA, VIN=4V-5V) Load Transient (IOUT=1mA-100mA) Load Transient (IOUT=200mA-300mA) Line Transient (IOUT=200mA, VIN=4V-5V) Load Transient (IOUT=100mA-200mA) Load Transient (IOUT=1mA-300mA) FORTUNE' Properties For Reference Only
Rev. 2.7 11/15 13. Detail Description The FS8853 is a low-dropout linear regulator. The device provides preset 1.8V and 3.3V output voltages for output current up to 300mA. Other mask options for special output voltages from 1.5V 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 cu rrent 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 30 μA (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 1.8V, 3.3V or can be mask-optioned from 1.5V to 5.0V 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. Current Limit 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 di fference 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: ( ) () JA A J CAJC A J MAX T T T TP θ θ θ −=+ 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. FORTUNE' Properties For Reference Only
Rev. 2.7 12/15 If the FS8853 uses a SOT-89 package and this 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: () ( ) WT TP CAJC A J MAX 555 . 0180 25 125=−=+ −= θ θ 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 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 FORTUNE' Properties For Reference Only
Rev. 2.7 13/15 14. Package Outline SOT-23 SOT-89 FORTUNE' Properties For Reference Only
Rev. 2.7 14/15 15. Revision History Version Date Page Description 1.1 2003/04/08 1 Features: The original statem ent of “Logic Control Shutdown Function” is a misdescription. 1.1 2003/04/08 1 Ordering Information: The meaning of “C” in Temperature Range is revised from “-40 to +70 ” to “Commercial Standard”. ℃℃ 1.1 2003/04/08 4 Absolute Maximum Ratings : Add Operating Junction Temperature Range -40 to +125 ; Operating Ambient Temperature Range is ℃℃ revised from “-40 to +80 ” to “℃℃ - 4 0 t o + 8 5”℃℃ 1.! 2003/04/08 5 Electrical Characteristics: Revise “Fixed Voltage Type VIN VOUT+0.4V” to “VIN VOUT+0.48V”. Divide “Output Voltage ≧≧ Accuracy” into two sections: When VIN 7V, it is ±35mV; when 7V≦ ＜VIN 9V, it is ±42mV. For the MA X. value of Dropout Voltage, ≦ when IOUT=1mA, 1.15mV is revised to 1.30mV; when IOUT=100mA,130mV is revised to 145mV; when IOUT=300mA, 400mV is revised to 480mV. 1.2 2003/05/09 5 Electrical Characteristi cs : Cancel example VOUT=3.3V, and show the whole range of VOUT (Fixed Voltage Type VOUT=1.3V~4.5V) 1.2 2003/05/09 6 Typical Operating Characte ristics: Cancel example VOUT=3.3V, and show the whole range of VOUT (Fixed Voltage Type VOUT=1.3V~4.5V) 1.3 2003/12/12 1 General Descr iption: Change “But for FS8853-19Cx, the output is 1.85V. For FS8853-29Cx, the out put is 2.85V.” to "except FS8853-29Cx which has 2.85V output voltage.” 1.3 2003/12/12 1 Features : Change "Low dropout voltage 120mV at 100mA" to "Low dropout voltage 400mV at 300mA" 1.3 2003/12/12 1 Ordering Information: Change 1.85V option to 1.9V. 1.3 2003/12/22 5 Electrical Characteristi cs: Change dropout vo ltage at Iout=300mA from 380mV to 400mV. 1.4 2004/03/16 1 General Description: Correct wording. 1.4 2004/03/16 3 Pin description: Correct wording. 1.4 2004/03/16 3 Change Function Block Diagrams to Functional Block Diagrams. 1.4 2004/03/16 4 Change Typical Application Sc hematic to Typical Application Circuit. 1.4 2004/03/16 4 Absolute Maximum Ratings: Remove Operating ambient temperature range. 1.4 2004/03/16 5 Electrical Characteristics: Add Symbol column. 1.4 2004/03/16 6 Typical Operating Ch aracteristics: Change all labels "TEMPERATURE" to "AMBIENT TEMPERATURE". Current header "Ron vs. LOAD CURRENT" 1.4 2004/03/16 9/10 Detail Descr iption: Correct wording. 1.4 2004/03/16 11 Change Package Information to Package Outline 1.4 2004/03/16 11/12 /13 Package Outline : Update SOT-23/SOT-89/TO-92 package diagrams. 1.4 2004/03/16 All Update page header and footer to standard format. Update page layout and style to standard format. 1.5 2004/05/11 1 Ordering Informati on: Add Pb/P free package option 1.5 2004/05/11 2 Pin Configurat ions: Change SOT-23 marking 1.5 2004/05/11 2 Package Marking Information: Change SOT-23 marking information, Add Pb/P free package marking information 1.5 2004/05/11 4 Absolute Maximum Rating: Change continuous power dissipation values and add notes. Add maximum junction temperature +155°C. FORTUNE' Properties For Reference Only
Rev. 2.7 15/15 Version Date Page Description 1.5 2004/05/11 5 Electrical Characteristi cs: Change thermal shutdown temperature from 170°C to 155°C. 1.5 2004/05/11 5 Electrical Characteristics: Change thermal resistance of SOT-89 from 150 to 180. Change thermal resistance of TO-92 from 220 to 180. 1.5 2004/05/11 10 Oper ating Region and Power Dissipation: Change the result of power dissipation calculation example for SOT-89. The calculated value is based on new thermal resistance and recommended operating temperature range. 1.6 2004/10/12 2 Package Marking Information: Change SOT-23 marking information. Change Pb/P free package marking from “4th digit with under line” to “a dot after marking”. 2.0 2005/05/10 All Update header/footer with new format. 2.0 2005/05/10 1 General Description: Update output voltages from “1.3V~4.5V” to “1.5V~5.0V”. Add “Quiescent current 30μA at 5V input.” 2.0 2005/05/10 1 Ordering Information: Dele te V,D,F,W,K,Y pin-out types. Update 2.0 2005/05/10 2 Pin Configurations: De lete V,D,F,W,K,Y pin-out types. 2.0 2005/05/10 3 Pin description: Delete V,D,F,W,K,Y pin-out types. Move pin descriptions into table. 2.0 2005/05/10 3 Typical Application Circui t: Update pin-out and connection diagram. 2.0 2005/05/10 5 Electrical Characteristics: Change the short-circuit current spec. from “Typ 140mA Max 160mA” to “Typ 300mA Max 350mA”. Change the ground pin current spec. form “Typ 65μA Max 120μA” to “Typ 30uA Max 50μA”. Change the test condition for previous two spec. to Vin=5.0V. Change PSRR spec. form “75dB @ 10KHz” to “70dB @ 1KHz” Change thermal shutdown hysteresis spec. from 20 to 10. 2.0 2005/05/20 6~8 Typical Operating Characteristics: Update all graphs. 2.0 2005/05/10 9 Detail Description: Update output voltages from “1.3V~4.5V” to “1.5V~5.0V”. Update quiescent current form “65μA” to “30μA”. 2.1 2006/09/27 All Revise datasheet format 2.2 2009/08/05 3 Ordering Information: Update package C、L、I Update package type G stands for Green-Package Update Output Voltage 18：1.8V、29：2.9V、30：3.0V、33：3.3V 2.3 2009/12/09 7~8 Vin Absolute Max. Rating：9V Vin Operating Range：2.5~7V 2.4 2010/05/18 3 A dd Output 3.0V 2.5 2010/07/28 3 Add Output 1.5V, 2.5V 2.6 2010/10/20 3 A dd Output 1.5V 2.7 2014/05/22 2 Revised company address FORTUNE' Properties For Reference Only