FS8853

FS8853 ETC

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300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 1/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 GGeenneerraall DDeessccrriippttiioonn 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 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. 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. FFeeaattuurreess z Low dropout voltage 400mV at 300mA (Typ.) z Up to ±35mV output voltage accuracy (VIN≦ 7V) Preset at 2.5V, 3.3V Mask options from 1.3V to 4.5V z Small output capacitor z Output current limit z Thermal overload shutdown protection z TO-92, SOT-89 and SOT-23 Package AApppplliiccaattiioonnss z Battery Powered Equipment z Palmtops z Portable Cameras and Video Recorders z Reference Voltage Sources z Post Regulator for Switching Power OOrrddeerriinngg IInnffoorrmmaattiioonn FS8853-xx x x P a c k a g e P i n O u t A : SOT-23 1.IN 2.GND 3.OUT B : S O T - 2 3 1 . G N D 2 . I N 3 . O U T C : S O T - 2 3 1 . G N D 2 . O U T 3 . I N V : SOT-23 1.OUT 2.GND 3.IN D : T O - 9 2 1 . I N 2 . G N D 3 . O U T E : T O - 9 2 1 . G N D 2 . I N 3 . O U T F : T O - 9 2 1 . O U T 2 . G N D 3 . I N W : TO-92 1.GND 2.OUT 3.IN K : S O T - 8 9 1 . I N 2 . G N D 3 . O U T 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 Y : SOT-89 1.GND 2.OUT 3.IN T e m p e r a t u r e R a n g e C : Commercial Standard P : Commercial Standard, Lead(Pb) Free and Phosphorous(P) Free Package O u t p u t V o l t a g e 13 : 1.3V 26 : 2.6V 39 : 3.9V 14 : 1.4V 27 : 2.7V 40 : 4.0V 15 : 1.5V 28 : 2.8V 41 : 4.1V 16 : 1.6V 29 : 2.85V 42 : 4.2V 17 : 1.7V 30 : 3.0V 43 : 4.3V 18 : 1.8V 31 : 3.1V 44 : 4.4V 19 : 1.9V 32 : 3.2V 45 : 4.5V 20 : 2.0V 33 : 3.3V 21 : 2.1V 34 : 3.4V 22 : 2.2V 35 : 3.5V 23 : 2.3V 36 : 3.6V 24 : 2.4V 37 : 3.7V 25 : 2.5V 38 : 3.8V Note : Mask option output types are a v a i l a b l e b y o r d e r o n l y

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 2/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 PPiinn CCoonnffiigguurraattiioonnss (BOTTOM VIEW) PPaacckkaaggee MMaarrkkiinngg IInnffoorrmmaattiioonn SOT-23 TO-92 & SOT-89 EX：FS8853-33CC Top Point：Lot No. Bottom Point：Year w : week, A~Z & A ~ Z EX：FS8853-33CL xxxx：Date Code EX：FS8853-33PC Top Point：Lot No. Bottom Point：Year w : week, A~Z & A ~ Z 4th Digit with Underline : Pb/P Free EX：FS8853-33PL xxxx：Date Code FS8853 xxxxxxxx 1 2 1 2 3 SOT-23 SOT-89 Part No. Pin 1 Pin 2 Pin 3 FS8853 -xxxD IN GND OUT FS8853 -xxxE GND IN OUT FS8853 -xxxF OUT GND IN FS8853 -xxxW GND OUT IN Part No. Pin 1 Pin 2 Pin 3 FS8853 -xxxA IN GND OUT FS8853 -xxxB GND IN OUT FS8853 -xxxC GND OUT IN FS8853 -xxxV OUT GND IN Part No. Pin 1 Pin 2 Pin 3 FS8853 -xxxK IN GND OUT FS8853 -xxxL GND IN OUT FS8853 -xxxI OUT GND IN FS8853 -xxxY GND OUT IN TO-92 1 2 3 3xxx W . . . . FS8853 33CLxxxx 3 33 C W. . . . 3 33 C W. . . . FS8853 33PLxxxx

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 3/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 PPiinn DDeessccrriippttiioonn Part NO. Symbol Description GND Ground pin. IN Regulator input pin. FS8853-xxCA FS8853-xxCB FS8853-xxCC FS8853-xxCV FS8853-xxCD FS8853-xxCE FS8853-xxCF FS8853-xxCW FS8853-xxCK FS8853-xxCL FS8853-xxCI FS8853-xxCY 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. FFuunnccttiioonnaall BBlloocckk DDiiaaggrraamm 1.25V Bandgap Reference Thermal Protection Current Limit Shutdown Logic IN GND OUT

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 4/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 TTyyppiiccaall AApppplliiccaattiioonn CCiirrccuuiitt AAbbssoolluuttee MMaaxxiimmuumm RRaattiinnggss Continuous power dissipation, PD (∆T= TJ -TA = 100°C) * The power dissipation values are based on the condition that junction temperature TJ 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 t he 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. FS8853

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 5/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 EElleeccttrriiccaall CChhaarraacctteerriissttiiccss (TA=25℃, unless otherwise noted.) Symbol Parameter Test Conditions Min Typ Max Unit VIN Input Voltage 2.5 9.0 V VIN=VOUT+0.48V, IOUT=1mA, VIN≦7V VOUT-

0.035 VOUT VOUT+

0.035 V VOUT Output Voltage VIN=VOUT+0.48V, IOUT=1mA, 7V＜VIN ≦9V VOUT-

0.042 VOUT VOUT+

0.042 V VIN>VOUT+0.48V, VIN≦7V -35 +35 mV ∆ VOUT Output Voltage Accuracy VIN>VOUT+0.48V, 7V＜VIN≦9V -42 +42 mV IMAX Maximum Load Current 300 mA ILIMIT Current Limit 0.6 A ISC Short-Circuit Current V OUT=0V, VIN>VOUT+0.48V 140 160 mA IQ Ground Pin Current ILOAD=0mA to 300mA, VIN=VOUT+0.48V 65 120 µA I OUT=1mA 1.1 1.3 mV I OUT=100mA 120 145 mV VDROP Dropout Voltage IOUT=300mA 400 480 mV ∆VLINE Line Regulation V OUT+0.48V<VIN<9V, ILOAD=1mA 0.2 0.3 %/V ∆VLOAD Load Regulation I OUT=0mA to 300mA 0.01 0.02 %/mA eN Output Noise F=1Hz to 10KHz, C OUT=3.3µF 70 µV RMS PSRR Ripple Rejection F=10KH z, COUT=3.3µF 75 dB TSD Thermal Shutdown Temperature 155 °C THYS Thermal Shutdown Hysteresis 20 °C SOT-23 320 °C/W SOT-89 180 °C/WθJA Thermal Resistance TO-92 180 °C/W

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 6/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 TTyyppiiccaall OOppeerraattiinngg CChhaarraacctteerriissttiiccss (CIN=1µF , COUT=3.3µF, TA=+25℃, 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. LOAD CURRENT 100 200 300 400 500 600 50 100 150 200 250 300 350 400 LOAD CURRENT (mA) DROPOUT VOLTAGE (mV) POWER SUPPLY REJECTION RATIO v.s FREQUENCY -90 -80 -70 -60 -50 -40 -30 -20 -10 0.01 0.1 1 10 100 1000 FREQUENCY (KHz) PSRR (db) GROUND PIN CURRENT vs. AMBIENT TEMPERATURE - 4 0 - 3 0 - 2 0 - 1 00 1 02 03 04 05 06 07 08 0 AMBIENT TEMPERATURE (℃) GROUND PIN CURRENT (µA) Ron vs. LOAD CURRENT 0.80 0.90 1.00 1.10 1.20 1.30 1.40 1.50 50 100 150 200 250 300 350 400 LOAD CURRENT (mA) Ron(Ω) GND PIN CURRENT vs. LOAD CURRENT 0 1 50 100 150 200 250 300 350 400 LOAD CURRENT (mA) GROUND PIN CURRENT (µA) 200mA 100mA 1mA 300mA *EX：Model FS8853-33Cx

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 7/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE 3.26 3.28 3.3 3.32 3.34 3.36 - 4 0 - 3 0 - 2 0 - 1 00 1 02 03 04 05 06 07 08 0 AMBIENT TEMPERATURE (℃) OUTPUT VOLTAGE (V) OUTPUT NOISE DC to 1MHz (37uVRMS) GROUND PIN CURRENT vs. INPUT VOLTAGE 100 120 140 0123456789 1 0 INPUT VOLTAGE (V) GROUND PIN CURRENT (µA) OUTPUT NOISE to 1MHz (67uVRMS) LINE TRANSIENT (IOUT=0mA) LINE TRANSIENT (IOUT=10mA) Iload =0mA Iload 300mA 5.0V 4.0V CIN 1µF COUT 3.3µF 50mV/div VIN VOUT 5.0V 4.0V CIN 1µF COUT 3.3µF 50mV/div VIN VOUT

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 8/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 LINE TRANSIENT (IOUT=100mA) LOAD TRANSIENT LOAD TRANSIENT LINE TRANSIENT (IOUT=200mA) LOAD TRANSIENT LOAD TRANSIENT VIN VOUT VIN VOUT 5.0V 4.0V CIN 1µF C OUT 3.3µF 50mV/div IOUT VOUT 100mA 0mA CIN 1µF COUT 3.3µF 100mV/div IOUT VOUT 300mA 0mA CIN 1µF COUT 3.3µF 5.0V 4.0V CIN 1µF C OUT 3.3µF 50mV/div IOUT VOUT 300mA 200mA CIN 1µF C OUT 3.3µF 50mV/div 200mA 100mA CIN 1µF C OUT 3.3µF 50mV/div 100mV/div IOUT VOUT

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 9/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 DDeettaaiill DDeessccrriippttiioonn 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. 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 T J = +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 T J = +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 dissip ation across the devices is P = I OUT x (VIN-VOUT). The resulting maximum power dissipation is: ( ) () JA AJ CAJC AJ MAX TTTTP θθθ −=+ Where (T J-TA) is the temperature difference between the FS8853 die junction and the surrounding air, θ JC 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

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 10/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 package is mounted on a double sided printed circuit board with two square inches of copper allocated for “heat spreading”, the resulting θ JA 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: () () WTTP CAJC AJ MAX 555.0180 25125 =−=+ −= θθ 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 (R DS(ON)) multiplied by the load current. VDROPOUT = VIN-VOUT = RDS(ON) x IOUT

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 11/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 PPaacckkaaggee OOuuttlliinnee SOT-23

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 12/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 SOT-89

300mA LDO Linear Regulator Fortune Semiconductor Co. TEL : +886-2-2809-4742 13/13 TD-0405006 Rev. 1.5 http://www.fsc.com.tw FAX: +886-2-2809-4874 TO-92