View FS8854_480548.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

FS8854
350mA LDO Linear Regulator
General Description
The FS8854 is a low-dropout linear regulator that operations in the input voltage range from +2.5V to +6.5V and delivers 350mA 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 5.0V with 100mV increment, except FS8854-29Cx which has 2.85V output voltage. The FS8854 consist 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 FS8854 devices are available in TO-92, SOT-89 and SOT-23 packages.
Ordering Information
FS8854-xx x x
Package 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 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 C : Commercial Standard P : Commercial Standard, Lead(Pb) Free and Phosphorous(P) Free Package 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 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 46 : 4.6V 47 : 4.7V 48 : 4.8V 49 : 4.9V 50 : 5.0V
Features
Low dropout voltage 500mV at 350mA (Typ.) Up to 35mV output voltage accuracy Preset at 2.5V, 3.3V Mask option from 1.3V to 5.0V Small output capacitor Output current limit Thermal overload shutdown protection TO-92, SOT-89 and SOT-23 Package
Applications
Battery Powered Equipment Palmtops Portable Cameras and Video Recorders Reference Voltage Sources Post Regulator for Switching Power
Note : Mask option output types are available by order only.
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
1/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Pin Configurations
Part No. Pin 1 Pin 2 Pin 3 FS8854 -xxxD IN GND OUT IN OUT IN IN
1 TO-92
Part No. Pin 1 Pin 2 Pin 3
3
SOT-89
2
FS8854 -xxxK
IN
GND OUT IN OUT IN IN
FS8854 xxCxxxxx
1 2 3
FS8854 GND -xxxE
(BOTTOM VIEW)
FS8854 OUT GND -xxxF FS8854 GND OUT -xxxW
FS8854 GND -xxxL
FS8854 OUT GND -xxxI FS8854 GND OUT -xxxY
SOT-23
Part No. Pin 1 Pin 2 Pin 3 FS8854 -xxxA IN GND OUT IN OUT IN IN
FS8854 GND -xxxB
..... 4xxx W ....
1 2
3
FS8854 GND OUT -xxxC FS8854 OUT GND -xxxV
Package Marking Information
SOT-23 EXFS8854-33CC
.....
TO-92 & SOT-89 EXFS8854-33CL
FS8854 33CLxxxx
xxxxDate Code
433C
...
Top PointLot No. Bottom PointYear w : week, A~Z & A ~ Z
W
EXFS8854-33PC
.....
EXFS8854-33PL
FS8854 33PLxxxx
xxxxDate Code
433C
...
.
W
Top PointLot No. Bottom PointYear w : week, A~Z & A ~ Z A dot after marking : Pb/P Free
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
2/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Pin Description
Part NO. FS8854-xxCA FS8854-xxCB FS8854-xxCC FS8854-xxCV FS8854-xxCD FS8854-xxCE FS8854-xxCF FS8854-xxCW FS8854-xxCK FS8854-xxCL FS8854-xxCI FS8854-xxCY Symbol GND Ground pin. Description
IN
Regulator input pin.
OUT
Regulator output pin.
IN is the regulator input pin. Supply voltage can range from 2.5V to 6.5V. Bypass with a 1F capacitor to GND. OUT is the output voltage pin. Sources up to 350mA. Bypass with a 3.3F capacitor to GND. GND provides the reference for all voltages.
Functional Block Diagram
IN
Current Limit
Shutdown Logic
Thermal Protection
OUT
R1
1.25V Bandgap Reference
R2
GND
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
3/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Typical Application Circuit
FS8854
Absolute Maximum Ratings
Input voltage VIN to GND ------------------------------------------------------------------------------------------------------7V Output current limit, I(LIMIT) ------------------------------------------------------------------------------------------------ 0.6A Continuous power dissipation, PD (T= TJ -TA = 100C) 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 100C. Junction Temperature, TJ ----------------------------------------------------------------------------------------------- +155C Storage temperature range, TSTG ---------------------------------------------------------------------- -55C to +150C Operating junction temperature range ---------------------------------------------------------------- -40C to +125C Lead temperature (soldering, 10sec) ------------------------------------------------------------------------------- 260C
* 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 Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
4/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Electrical Characteristics
(TA=25, unless otherwise noted.) Symbol VIN VOUT VOUT IMAX ILIMIT ISC IQ VDROP VLINE VLOAD Parameter Input Voltage Output Voltage Output Voltage Accuracy Maximum Load Current Current Limit Short-Circuit Current Ground Pin Current Dropout Voltage Line Regulation Load Regulation Output Noise Ripple Rejection Thermal Shutdown Temperature Thermal Shutdown Hysteresis Thermal Resistance VOUT=0V, VIN>VOUT+0.6V ILOAD=0mA to 350mA, VIN=VOUT+0.6V IOUT=100mA IOUT=300mA IOUT=350mA VOUT+0.6VVOUT+0.6V, VIN6.5V Test Conditions Min 2.5 VOUT0.035 -35 350 0.6 160 90 145 480 600 0.3 0.03 Typ Max Unit V V mV mA A mA A mV mV mV %/V %/mA VRMS dB C C C/W C/W C/W 6.5 VOUT+ VOUT 0.035 +35
eN
PSRR TSD THYS
JA
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
5/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Typical Operating Characteristics
(CIN=1F , COUT=3.3F, TA=+25, unless otherwise noted.)
OUTPUT VOLTAGE vs. INPUT VOLTAGE
3.5
65
GROUND PIN CURRENT vs. AMBIENT TEMPERATURE
OUTPUT VOLTAGE (V)
GROUND PIN CURRENT (A)
3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 7
60 55 50 45 40 35 30 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80
1mA 100mA 200mA 350mA
INPUT VOLTAGE (V) *EXModel FS8854-33Cx
AMBIENT TEMPERATURE () Ron vs. LOAD CURRENT
1.60 1.50 1.40
DROPOUT VOLTAGE vs. LOAD CURRENT
0.7
DROPOUT VOLTTAGE (V)
0.6 0.5 0.4 0.3 0.2
Ron ()
50 100 150 200 250 300 350 400
1.30 1.20 1.10 1.00
0.1 0.0
0.90 0.80 50 100 150 200 250 300 350 400
LOAD CURRENT (mA)
POWER SUPPLY REJECTION RATIO vs. FREQUENCY
-100
LOAD CURRENT (mA)
GND PIN CURRENT vs. LOAD CURRENT
60.00
-80
GROUND PIN CURRENT (A)
-90
58.00 56.00 54.00 52.00 50.00 48.00 46.00 0 1 50 100 150 200 250 300 350 400
PSRR (db)
-70 -60 -50 -40 -30 -20 -10 0 0.01 0.1 1 10 100 1000
FREQUENCY (KHz)
LOAD CURRENT (mA)
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
6/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE
3.36 80
GROUND PIN CURRENT vs. INPUT VOLTAGE GROUND PIN CURRENT (A)
70 60 50 40 30 20 10 0
OUTPUT VOLTAGE (V)
3.34
3.32
3.3
3.28
3.26 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80
0
1
2
3
4
5
6
7
AMBIENT TEMPERATURE ()
INPUT VOLTAGE (V)
LINE TRANSIENT (IOUT=10mA)
LINE TRANSIENT (IOUT=0mA)
5.0V VIN 4.0V VIN
5.0V 4.0V
VOUT
CIN 1F COUT 3.3F 50mV/div LINE TRANSIENT (IOUT=200mA)
VOUT
CIN 1F COUT 3.3F 50mV/div LINE TRANSIENT (IOUT=350mA)
5.0V VIN 4.0V VIN
5.0V 4.0V
VOUT
CIN 1F COUT 3.3F 50mV/div
VOUT
CIN 1F COUT 3.3F 50mV/div
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
7/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
LOAD TRANSIENT LOAD TRANSIENT
100mA IOUT 0mA IOUT
200mA 100mA
VOUT
CIN 1F COUT 3.3F 50mV/div
VOUT
CIN 1F COUT 3.3F 50mV/div
LOAD TRANSIENT LOAD TRANSIENT
350mA IOUT 200mA IOUT
350mA 0mA
VOUT
CIN 1F COUT 3.3F 50mV/div
VOUT
CIN 1F COUT 3.3F 100mV/div
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
8/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Detail Description
The FS8854 is a low-dropout linear regulator. The device provides preset 2.5V and 3.3V output voltages for output current up to 350mA. Other mask options for special output voltages from 1.3V 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 current limiter, thermal sensor, and shutdown logic. Internal P-channel Pass Transistor The FS8854 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 FS8854 does not suffer from these problems and consumes only 65A (Typ.) of ground pin current under heavy loads as well as in dropout conditions. Output Voltage Selection The FS8854 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 FS8854-33CL has a preset 3.3V output voltage.
Fortune Semiconductor Corp. TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
Current Limit The FS8854 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 FS8854. When the junction temperature exceeds TJ = +155C, 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 20C, resulting in a pulsed output during continuous thermal overload conditions. Thermal overload protection is designed to protect the FS8854 in the event of fault conditions. For continuous operation, the maximum operating junction temperature rating of TJ = +125C should not be exceeded. Operating Region and Power Dissipation Maximum power dissipation of the FS8854 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
JC
- T A ) (TJ - T A ) = JA + CA
Where (TJ-TA) is the temperature difference between the FS8854 die junction and the surrounding air, JC is the thermal resistance of the package chosen, and CA 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 FS8854 uses a SOT-89 package and this
9/13 TD-0410025 Rev. 1.4
http://www.fsc.com.tw
FS8854
350mA 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 JA is 180C/W. Based on a maximum operating junction temperature 125C with an ambient of 25C, the maximum power dissipation will be: 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 FS8854 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
PMAX =
(TJ
JC
- T A ) (125 - 25) = = 0.555W + CA 180
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 Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
10/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
Package Outline SOT-23
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
11/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
SOT-89
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
12/13
TD-0410025
Rev. 1.4
FS8854
350mA LDO Linear Regulator
TO-92
Fortune Semiconductor Corp.
http://www.fsc.com.tw
TEL : +886-2-2809-4742 FAX: +886-2-2809-4874
13/13
TD-0410025
Rev. 1.4

▲Up To Search▲

Price & Availability of FS8854

	To Download FS8854 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .