FS8854 350mA Linear Regulator Ordering Information FS8854-xx

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FS8854 350mA Linear Regulator Ordering Information FS8854-xx

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FS8854 350mA Linear Regulator
Ordering Information
FS8854-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
FS8854 low-dropout linear regulator operation from +2.5V +6.5V input range delivers 350mA load current. high-accuracy output voltage preset internally trimmed voltage 2.5V, 3.3V, mask option from 1.3V 5.0V with 100mV increment. FS8854-19Cx, output 1.85V. FS8854-29Cx, output 2.85V. FS8854 consist 1.25V reference compare amplifier, P-channel pass transistor allows 65µA (Typ.) ground current. Other features include short-circuit protection, thermal shutdown protection.
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 4.6V 4.7V 4.8V 4.9V 5.0V
Features
dropout voltage 120mV 100mA (Typ.) ±35mV output voltage accuracy Preset 2.5V, 3.3V Mask option from 1.3V 5.0V Small output capacitor Output current limit Thermal overload shutdown protection TO-92, SOT-89 SOT-23 Package
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 FS8854 -xxCD
FS8854 350mA Linear Regulator
TO-92
Part
SOT-89 FS8854 xxCxxxxx
FS8854 -xxCE
FS8854 -xxCK
(BOTTOM VIEW)
FS8854 -xxCF FS8854 -xxCW
FS8854 -xxCL
FS8854 -xxCI FS8854 -xxCY
SOT-23
4xxx
Part FS8854 -xxCA
FS8854 -xxCB
FS8854 -xxCC FS8854 -xxCV
Package Marking Information SOT-23 EXFS8854-33CC
Other Package EXFS8854-33CL
FS8854 33CLxxxx
PointDate CodeMonth Bottom PointDate CodeDay
xxxxDate Code
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Description
Part FS8854-xxCA FS8854-xxCB FS8854-xxCC FS8854-xxCV FS8854-xxCD FS8854-xxCE FS8854-xxCF FS8854-xxCW FS8854-xxCK FS8854-xxCL FS8854-xxCI FS8854-xxCY
FS8854 350mA Linear Regulator
Symbol Ground.
Description
Regulator input.
Regulator output.
regulator input. Supply voltage range from 2.5V 6.5V. Bypass with capacitor GND. output voltage. Sources 350mA. 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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FS8854 350mA Linear Regulator
Typical Application Schematic
FS8854
Absolute Maximum Ratings
Input voltage 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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FS8854 350mA Linear Regulator
Electrical Characteristics
(TA=25, unless otherwise noted.)
PARAMETER
Input Voltage Output Voltage Output Voltage Accuracy Maximum Load Current Current Limit Short-Circuit Current Ground Current Dropout Voltage Line Regulation Load Regulation PSRR Thermal Shutdown Temperature Thermal Shutdown Hysteresis SOT-23 Thermal Resistance SOT-89 TO-92
CONDITIONS
VIN=VOUT+0.6V, IOUT=1mA VIN>VOUT+0.6V, VIN6.5V
VOUT0.035
VOUT
VOUT+ 0.035
UNITS
%/mA
VOUT=0V, VIN>VOUT+0.6V ILOAD=0mA 350mA, VIN=VOUT+0.6V IOUT=1mA IOUT=100mA IOUT=350mA VOUT+0.6V<VIN<6.5V, ILOAD=1mA IOUT=0mA 350mA F=10KHz, COUT=3.3µF 0.02 0.03
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FS8854 350mA 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 350mA
INPUT VOLTAGE *EXModel FS8854-33Cx
DROPOUT VOLTAGE LOAD CURRENT
TEMPERATURE LOAD CURRENT
1.60 1.50 1.40
DROPOUT VOLTTAGE
1.30 1.20 1.10 1.00
0.90 0.80
LOAD CURRENT (mA)
POWER SUPPLY REJECTION RATIO FREQUENCY
-100
LOAD CURRENT (mA)
CURRENT LOAD CURRENT
60.00
GROUND CURRENT (uA)
58.00 56.00 54.00 52.00 50.00 48.00 46.00
PSRR (db)
0.01 1000
FREQUENCY (KHz)
LOAD CURRENT (mA)
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FS8854 350mA Linear Regulator
OUTPUT VOLTAGE TEMPERATURE
3.36
GROUND CURRENT INPUT VOLTAGE
GROUND CURRENT (uA)
OUTPUT VOLTAGE
3.34
3.32
3.28
3.26
TEMPERATURE
INPUT VOLTAGE
LINE TRANSIENT (IOUT=0mA)
LINE TRANSIENT (IOUT=10mA)
5.0V 4.0V
5.0V 4.0V
VOUT
COUT 3.3uF 50mV/div LINE TRANSIENT (IOUT=200mA)
VOUT
COUT 3.3uF 50mV/div LINE TRANSIENT (IOUT=350mA)
5.0V 4.0V
5.0V 4.0V
VOUT
COUT 3.3uF 50mV/div
VOUT
COUT 3.3uF 50mV/div
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LOAD TRANSIENT
FS8854 350mA Linear Regulator
LOAD TRANSIENT
100mA IOUT IOUT
200mA 100mA
VOUT
COUT 3.3uF 50mV/div
VOUT
COUT 3.3uF 50mV/div
LOAD TRANSIENT LOAD TRANSIENT
350mA IOUT 200mA IOUT
350mA
VOUT
COUT 3.3uF 50mV/div
VOUT
COUT 3.3uF 100mV/div
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Detail Description
FS8854 350mA Linear Regulator
Current Limit FS8854 low-dropout linear regulator. supplies pre-selected 2.5V, 3.3V output mask option from 1.3V 5.0V with 100mV increment load currents 350mA. 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 FS8854 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. FS8854 does suffer from these problems consumes only 65µA (Typ.) ground current under heavy loads well dropout. Output Voltage Selection FS8854 output voltage preset internally trimmed voltage 2.5V, 3.3V mask option from 1.3V 5.0V with 100mV increment. first two-digit part number suffix identifies output voltage (see Ordering Information). example, FS8854-33CL preset 3.3V output voltage. FS8854 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 FS8854. 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 FS8854 event fault conditions. continual operation, absolute maximum junction temperature rating +170 should exceeded. Operating Region Power Dissipation Maximum power dissipation FS8854 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 FS8854 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. FS8854 uses SOT-89 package, When this
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FS8854 350mA 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. FS8854 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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FS8854 350mA Linear Regulator
Package Information SOT-23
SOT-89
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FS8854 350mA Linear Regulator Ordering Information FS8854-xx

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