FS8853 300mA Linear Regulator Ordering Information FS8853-xx

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FS8853 300mA Linear Regulator Ordering Information FS8853-xx

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FS8853 300mA Linear Regulator
Ordering Information
FS8853-xx
Package ASOT-23 BSOT-23 CSOT-23 VSOT-23 DTO-92 ETO-92 FTO-92 WTO-92 KSOT-89 LSOT-89 ISOT-89 YSOT-89 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
FS8853 low-dropout linear regulator operation from +2.5V +9.0V input range delivers 300mA load current. high-accuracy output voltage preset internally trimmed voltage 2.5V, 3.3V mask option from 1.3V 4.5V with 100mV increment. FS8853-19Cx, output 1.85V. FS8853-29Cx, output 2.85V. FS8853 consist 1.25V reference compare amplifier, P-channel pass transistor allows 65µA (Typ.) ground current. Other features include short-circuit protection, thermal shutdown protection.
Features
dropout voltage 120mV 100mA (Typ.) ±35mV output voltage accuracy (VIN Preset 2.5V, 3.3V Mask option from 1.3V 4.5V Small output capacitor Output current limit Thermal overload shutdown protection TO-92, SOT-89 SOT-23 Package
Temperature Range CCommercial Standard Output Voltage 1.3V 1.4V 1.5V 1.6V 1.7V 1.8V 1.85V 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V 2.85V 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V 3.6V 3.7V 3.8V 3.9V 4.0V 4.1V 4.2V 4.3V 4.4V 4.5V
Applications
Battery Powered Equipment Palmtops Portable Cameras Video Recorders Reference Voltage Sources Post Regulator Switching Power
Note Mask option output types available order
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Part FS8853 -xxCD
FS8853 300mA Linear Regulator
TO-92
Part
SOT-89 FS8853 xxCxxxxx
FS8853 -xxCE
FS8853 -xxCK
(BOTTOM VIEW)
FS8853 -xxCF FS8853 -xxCW
FS8853 -xxCL
FS8853 -xxCI FS8853 -xxCY
SOT-23
3xxx
Part FS8853 -xxCA
FS8853 -xxCB
FS8853 -xxCC FS8853 -xxCV
Package Marking Information SOT-23 EXFS8853-33CC
Other Package EXFS8853-33CL
FS8853 33CLxxxx
PointDate CodeMonth Bottom PointDate CodeDay
xxxxDate Code
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Description
Part FS8853-xxCA FS8853-xxCB FS8853-xxCC FS8853-xxCV FS8853-xxCD FS8853-xxCE FS8853-xxCF FS8853-xxCW FS8853-xxCK FS8853-xxCL FS8853-xxCI FS8853-xxCY
FS8853 300mA Linear Regulator
Symbol Ground.
Description
Regulator input.
Regulator output.
regulator input. Supply voltage range from 2.5V 9.0V. Bypass with capacitor GND. output voltage. Sources 300mA. Bypass with 3.3µF capacitor GND. provides reference voltages. This also functions heat sink. Solder large circuit-board ground plane maximize power dissipation.
Function Block Diagram
Current Limit
Shutdown Logic
Thermal Protection
1.25V Bandgap Reference
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FS8853 300mA Linear Regulator
Typical Application Schematic
FS8853
Absolute Maximum Ratings
Input voltage -10V Output current limit, I(LIMIT) 0.6A Continuous power dissipation, SOT-23 0.45W SOT-89 0.95W TO-92 0.65W Storage temperature range, TSTG +150 Operating ambient temperature range Operating junction temperature range +125 Lead temperature (soldering, 10sec)
Stresses beyond those listed under "absolute maximum ratings" cause permanent damage device. These stress ratings only, function operation device these other conditions beyond those indicated under "recommended operating conditions" implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability.
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FS8853 300mA Linear Regulator
Electrical Characteristics
(TA=25, unless otherwise noted.)
PARAMETER
Input Voltage Output Voltage
CONDITIONS
VOUT VOUT
UNITS
VOUT+ 0.035 VOUT+ 0.042 %/mA µVRMS 0.02
Output Voltage Accuracy Maximum Load Current Current Limit Short-Circuit Current Ground Current Dropout Voltage Line Regulation Load Regulation Output Noise PSRR Thermal Shutdown Temperature Thermal Shutdown Hysteresis
VOUTVIN=VOUT+0.48V, IOUT=1mA, VIN7V 0.035 VIN=VOUT+0.48V, IOUT=1mA, 7VVIN VOUT0.042 VIN>VOUT+0.48V, VIN7V VIN>VOUT+0.48V, 7VVIN9V
VOUT=0V, VIN>VOUT+0.48V ILOAD=0mA 300mA, VIN=VOUT+0.48V IOUT=1mA IOUT=100mA IOUT=300mA VOUT+0.48V<VIN<9V, ILOAD=1mA IOUT=0mA 300mA F=1Hz 10KHz, COUT=3.3µF F=10KHz, COUT=3.3µF 0.01 SOT-23 SOT-89 TO-92
Thermal Resistance
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FS8853 300mA Linear Regulator
Typical Operating Characteristics
(CIN=1µF COUT=3.3µF, TA=+25, unless otherwise noted.)
OUTPUT VOLTAGE INPUT VOLTAGE
GROUND CURRENT TEMPERATURE
OUTPUT VOLTAGE
GROUND CURRENT (uA)
100mA 200mA 300mA
INPUT VOLTAGE
*EXModel FS8853-33Cx
TEMPERATURE
DROPOUT VOLTAGE LOAD CURRENT
1.50
LOAD CURRENT
1.40
DROPOUT VOLTAGE (mV)
1.30
Ron()
1.20 1.10 1.00
0.90 0.80
LOAD CURRENT (mA)
LOAD CURRENT (mA)
POWER SUPPLY REJECTION RATIO FREQUENCY
CURRENT LOAD CURRENT
GROUND CURRENT (uA)
PSRR (db)
0.01 1000
FREQUENCY (KHz)
LOAD CURRENT (mA)
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FS8853 300mA Linear Regulator
OUTPUT VOLTAGE TEMPERATURE
GROUND CURRENT INPUT VOLTAGE GROUND CURRENT (uA)
3.36
OUTPUT VOLTAGE
3.34
3.32
3.28
3.26
TEMPERATURE
INPUT VOLTAGE
OUTPUT NOISE 1MHz (37uVRMS)
OUTPUT NOISE 1MHz (67uVRMS)
Iload =0mA
Iload =300mA
LINE TRANSIENT (IOUT=0mA)
LINE TRANSIENT (IOUT=10mA)
5.0V 4.0V
5.0V 4.0V
VOUT
COUT 3.3uF 50mV/div
VOUT
COUT 3.3uF 50mV/div
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FS8853 300mA Linear Regulator
LINE TRANSIENT (IOUT=100mA) LINE TRANSIENT (IOUT=200mA)
5.0V 4.0V
5.0V 4.0V
VOUT
COUT 3.3uF 50mV/div LOAD TRANSIENT
VOUT
COUT 3.3uF 50mV/div LOAD TRANSIENT
100mA IOUT IOUT
200mA 100mA
VOUT COUT 3.3uF 100mV/div LOAD TRANSIENT
VOUT COUT 3.3uF 50mV/div LOAD TRANSIENT
300mA IOUT 200mA IOUT
300mA
VOUT COUT 3.3uF 50mV/div
VOUT COUT 3.3uF 100mV/div
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Detail Description
FS8853 300mA Linear Regulator
Current Limit FS8853 low-dropout linear regulator. supplies pre-selected 2.5V, 3.3V output mask option from 1.3V 4.5V with 100mV increment load currents 300mA. illustrated function block diagram, consists 1.25V reference, error amplifier, p-channel pass transistor internal feedback voltage divider. 1.25V bandgap reference connected error amplifier, which compares this reference with feedback voltage amplifies difference. feedback voltage lower than reference voltage, pass-transistor gate pulled lower, which allows more current pass output increases output voltage. feedback voltage high, pass-transistor gate pulled allowing less current pass output. output voltage feedback through internal resistive divider connected OUT. Additional blocks include output current limiter, thermal sensor, shutdown logic. Internal P-channel Pass Transistor FS8853 features P-channel MOSFET pass transistor. Unlike similar designs using pass transistors, P-channel MOSFETs require base drive, which reduces ground current. PNP-based regulators also waste considerable current dropout when pass transistor saturates, high base-drive currents under large loads. FS8853 does suffer from these problems consumes only 65µA (Typ.) ground current under heavy loads well dropout. Output Voltage Selection FS8853 output voltage preset internally trimmed voltage 2.5V, 3.3V mask option from 1.3V 4.5V with 100mV increment. first two-digit part number suffix identifies output voltage (see Ordering Information). example, FS8853-33CL preset 3.3V output voltage. FS8853 also include fold back current limiter. monitors controls pass transistor's gate voltage, estimating output current limiting 0.6A. Thermal Overload Protection Thermal overload protection limits total power dissipation FS8853. When junction temperature exceeds +170, thermal sensor turns pass transistor, allowing cool. thermal sensor turns pass transistor again after junction temperature cools resulting pulsed output during continuous thermal overload conditions. Thermal overload protection designed protect FS8853 event fault conditions. continual operation, absolute maximum junction temperature rating +170 should exceeded. Operating Region Power Dissipation Maximum power dissipation FS8853 depends thermal resistance case circuit board, temperature difference between junction ambient air, rate airflow. power dissipation across devices IOUT (VIN-VOUT). resulting maximum power dissipation
PMAX
Where (TJ-TA) temperature difference between FS8853 junction surrounding air, thermal resistance package chosen, thermal resistance through printed circuit board, copper traces other materials surrounding air. best heatsinking, copper area should equally shared between OUT, pins. FS8853 uses SOT-89 package, When this
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FS8853 300mA Linear Regulator
package mounted double sided printed circuit board with square inches copper allocated "heat spreading", resulting Based maximum junction temperature with ambient maximum power dissipation will
spreading". Input-Output Voltage regulator's minimum input-output voltage differential, dropout voltage, determines lowest usable supply voltage. battery-powered systems, this will determine useful end-of-life battery voltage. FS8853 uses P-channel MOSFET pass transistor, dropout voltage function drain-to-source on-resistance (RDS(ON)) multiplied load current. VDROPOUT VIN-VOUT RDS(ON) IOUT
PMAX
(170 0.9667W
Thermal characteristics were measured using double sided board with square inches copper area connected pins "heat
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FS8853 300mA Linear Regulator
Package Information SOT-23
SOT-89
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FS8853 300mA Linear Regulator
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FS8853 300mA Linear Regulator Ordering Information FS8853-xx

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