View AP2281-1FMG-7_4992333.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

AP2281
Single Slew Rate Controlled Load Switch
Features
* * * * * * * * * * Wide input voltage range: 1.5V - 6V Low RDS(ON): 80m typical @ 5V Turn-on slew rate controlled AP2281-1: 1ms turn-on rise time AP2281-3: 100us turn-on rise time with internal discharge Very low turn-on quiescent current: << 1uA Fast load discharge option Temperature range -40C to 85C SOT26 and DFN2018-6: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1)
Description
The AP2281 slew rate controlled load switch is a single P-channel MOSFET power switch designed for high-side load-switching applications. The MOSFET has a typical RDS(ON) of 80m at 5V, allowing increased load current handling capacity with a low forward voltage drop. The turn-on slew rate of the device is controlled internally. The AP2281 load switch is designed to operate from 1.5V to 6V, making it ideal for 1.8V, 2.5V, 3.3V, and 5V systems. The typical quiescent supply current is only 0.01uA.
Applications
* * * * * * Smart Phones PDA Cell Phones GPS Navigators PMP/MP4 Notebook and Pocket PC
Ordering Information
AP2281 - X XX G - 7
Turn-on rise time 1 : 1ms 3 : 100us
Device AP2281-1WG-7 AP2281-3WG-7 AP2281-1FMG-7 AP2281-3FMG-7
Notes:
Package W : SOT26 FM : DFN2018-6
Packaging (Note 2) SOT26 SOT26 DFN2018-6 DFN2018-6
Green G : Green
Packing 7 : Tape & Reel
Package Code W W FM FM
7" Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 3000/Tape & Reel -7 3000/Tape & Reel -7
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf
AP2281 Rev. 4
1 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Pin Assignments
(Top View) OUT 1 GND 2 EN 3 SOT26 6 IN 5 GND 4 IN
( Top View ) IN IN EN
1 2 3 6 5 4
OUT OUT GND
DFN2018-6
Pin Description
Pin Number SOT26 OUT GND EN IN 1 2, 5 3 4, 6 DFN2018-6 5, 6 4 3 1, 2 Voltage output pin. This is the pin to the P-channel MOSFET drain connection. Bypass to ground through a 0.1uF capacitor. Ground. Enable input, active high Voltage input pin. This is the pin to the P-channel MOSFET source. Bypass to ground through a 1F capacitor.
Pin Name
Description
Options
Part Number AP2281-1 AP2281-3 Slew Rate (typ) 1ms 100us Active pull down no yes Enable Active high Active high
AP2281 Rev. 4
2 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Block Diagram
Typical Application Circuit
VIN
IN OUT
VOUT
1uF
Enable EN GND
AP2281 Rev. 4
3 of 13 www.diodes.com
For AP2281-3 only
0.1uF
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Absolute Maximum Ratings
Symbol ESD HBM ESD MM VIN VOUT VEN Iload TJ TST PD
Notes:
Parameter Human Body Model ESD Protection Machine Model ESD Protection SOT26 DFN2018-6
Input Voltage Output Voltage Enable Voltage Maximum Continuous Load Current Operating Junction Temperature Range Storage Temperature Range SOT26 (Note 3, 4, 5) Power Dissipation DFN2018-6 (Note 3, 4, 6)
Ratings 5 500 450 6.5 VIN + 0.3 6.5 2 -40 ~ 125 -65 ~ 150 720 1410
Unit KV V V V V V A C C mW mW
3. TJ, max =125C. 4. Ratings apply to ambient temperature at 25C.
Recommended Operating Conditions
Symbol VIN IOUT TA Parameter Input voltage Output Current Operating Ambient Temperature Min 1.5 0 -40 Max 6.0 2.0 85 Unit V A
C
AP2281 Rev. 4
4 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Electrical Characteristics
(TA = 25oC, VIN = 5.0V, unless otherwise stated) Symbol Parameters Test Conditions Input Quiescent Current VEN = VIN, IOUT= 0 IQ Input Shutdown Current VEN = 0V, OUT open ISHDN Input Leakage Current VEN = 0V, OUT grounded ILEAK VIN = 5.0V VIN = 3.3V Switch on-resistance RDS(ON) VIN = 1.8V VIN = 1.5V EN Input Logic Low Voltage VIN = 1.5V to 6V VIL 1.5V VIN 2.7V EN Input Logic High Voltage 2.7V < VIN < 5.25V VIH VIN 5.25V VEN = 5V EN Input leakage ISINK Output turn-on delay time TD(ON) Rload=10 AP2281-1, Rload=10 Output turn-on rise time TON AP2281-3, Rload=10 Output turn-off delay time Rload=10 TD(OFF) Discharge FET on-resistance For AP2281-3 only, VEN = GND RDISCH SOT26 (Note 5) Thermal Resistance JA Junction-to-Ambient DFN2018-6 (Note 6)
Min

Typ. 0.01 0.01 0.01 80 95 160 210
Max 1 1 1 100 120 210 280 0.4
Unit
1.4 1.6 1.7 1 1000 100 0.5 65 153 78 29 19
1 1500 150 1 100
o
A A A m m m m V V V V A S S S S
C/W C/W
JC
Notes:
Thermal Resistance Junction-to-case
SOT26 (Note 5) DFN2018-6 (Note 6)
o
5. Test condition for SOT26: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout. 6. Test condition for DFN2018-6: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 3 vias to bottom layer 1.0"x1.4" ground plane.
AP2281 Rev. 4
5 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Typical Performance Characteristics
Quiescent Current vs. Input Voltage
0.010
0.01
Quiescent Current vs. Temperature Q u ie s c e n t C u rre n t ( A )
VIN=1.8V 0.008 VIN=3.3V VIN=5.0V 0.006
Quiescent C urrent ( A )
0.008
0.006
0.004
0.004
0.002
0.002
0 1.0 2.0 3.0 4.0 5.0 6.0
Input Voltage (V)
0.000 -50
-25
0
25
50
75
100
125
Temperature (C)
RDS(ON) vs. Input Voltage
300.00 I=100mA 250.00 I=500mA I=1A
RDS(ON) vs. Temperature
200.00 180.00 160.00
RDS(ON) (m )
I=2A 200.00
R DS(O N) (m )
140.00 120.00 100.00 80.00 60.00 40.00 20.00 VIN =1.8V VIN =3.3V VIN =5V
150.00
100.00
50.00 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
0.00 -50
-25
0
25
50
75
100
Input Voltage (V)
Temperature (C)
ENABLE Threshold vs. Input Voltage
1.8
0.010
Input Shutdown Current vs. Temperature
O N /O F F T h re s h o ld (V )
1.6 1.4
0.008
ISH D N ( A )
VIL (V) VIH (V)
1.2 1.0 0.8 0.6 0.4 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
0.006 0.004 0.002 0.000 -50 -25 0 25 50 75 100 125
Input Voltage (V)
Temperature (C)
AP2281 Rev. 4
6 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Typical Performance Characteristics
AP2281-1 Turn-On
(VIN=3.3V, RL=7)
(Continued)
AP2281-1 Turn-Off
(VIN=3.3V, RL=7)
VEN (5V/div)
VEN (5V/div)
VOUT (2V/div)
VOUT (2V/div)
IIN (500mA/div) IIN (500mA/div)
Time (500s/div)
Time (50s/div)
AP2281-1 Turn-On
(VIN=5V, RL=10)
VEN (5V/div) VEN (5V/div)
AP2281-1 Turn-Off
(VIN=5V, RL=10)
VOUT (2V/div) VOUT (2V/div)
IIN (500mA/div) IIN (500mA/div)
Time (500s/div)
Time (50s/div)
AP2281 Rev. 4
7 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Typical Performance Characteristics
AP2281-3 Turn-On
(VIN=3.3V, RL=7)
(Continued)
AP2281-3 Turn-Off
(VIN=3.3V, RL=7)
VEN (5V/div)
VEN (5V/div)
VOUT (2V/div)
VOUT (2V/div)
IIN (500mA/div) IIN (500mA/div)
Time (50s/div)
Time (50s/div)
AP2281-3 Turn-On
(VIN=5V, RL=10)
VEN (5V/div) VEN (5V/div)
AP2281-3 Turn-Off
(VIN=5V, RL=10)
VOUT (2V/div) VOUT (2V/div)
IIN (500mA/div) IIN (500mA/div)
Time (50s/div)
Time (50s/div)
AP2281 Rev. 4
8 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Application Note
Input Capacitor A 1F capacitor is recommended to connect between IN and GND pins to decouple input power supply glitch and noise. The input capacitor has no specific type or ESR (Equivalent Series Resistance) requirement. However, for higher current application, ceramic capacitors are recommended due to their capability to withstand input current surges from low impedance sources, such as batteries in portable applications. This input capacitor must be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both IN and GND. Output Capacitor A 0.1F capacitor is recommended to connect between OUT and GND pins to stabilize and accommodate load transient condition. The output capacitor has no specific type or ESR requirement. The amount of the capacitance may be increased without limit. For PCB layout, the output capacitor must be placed as close as possible to OUT and GND pins, and keep the traces as short as possible. ENABLE/SHUTDOWN Operation The AP2281 is turned on by setting the EN pin high, and is turned off by pulling it low. To ensure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH. Power Dissipation The device power dissipation and proper sizing of the thermal plane is critical to avoid thermal shutdown and ensure reliable operation. Power dissipation of the device depends on input voltage and load conditions and can be calculated by:
PD = IOUT xR DSON
2
(1)
However, the maximum power dissipation that can be handled by the device depends on the maximum junction to ambient thermal resistance, maximum ambient temperature, and maximum device junction temperature, which can be approximated by the equation below:
PD (max@ TA ) =
( +125C - TA ) JA
(2)
For example at VIN = 5V, the typical RDSON = 80m. For IOUT = 2A, the maximum power dissipation calculated using equation (1) is PD = 0.32W. Based on SOT26 JA = 153C/W and equation (2), the calculated junction temperature rise from ambient is approximately 49C. Since the maximum junction temperature is 125C, the operating ambient temperature must be kept below 76C to safely operate the device. On the other hand, at TA = 85C and VIN = 5V, the calculated maximum power dissipation from equation (2) is approximately PDmax = 0.26W. Hence the safe operating maximum continuous current is 1.81A. For other application conditions, the users should recalculate the device maximum power dissipation based on the operating conditions.
DISCHARGE Operation The AP2281-3 offers discharge option that helps to discharge the output charge when disabled.
AP2281 Rev. 4
9 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Marking Information
(1) SOT26
( Top View )
6 5 4
7
XX Y W X
1
2
3
XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green
Package type SOT26 SOT26 Identification Code U2 U3
Device AP2281-1W AP2281-3W
(2) DFN2018-6
( Top View ) XX YWX XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green
Package type DFN2018-6 DFN2018-6 Identification Code UE UF
.
Device AP2281-1FM AP2281-3FM
AP2281 Rev. 4
10 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Package Information
(1) Package type: SOT26
AP2281 Rev. 4
11 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Package Information
(2) Package type: DFN2018-6
(Continued)
0.545/0.605
0.10 C 6X 0.08 C
0/0.05
0.13Typ
Seating P lane 2X0.25 A
S id e V ie w
C
B
1.75 /1.875
C L
A 0.2/0.3
1.95/2.075
Pin #1 ID
1.3/1.5
C L
0.30T yp
2X -
0.25 B
0.50 T yp
0.15/0.25
0.9/1.1
0.10
CAB
B o tto m V ie w
AP2281 Rev. 4
12 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Taping Orientation
Notes:
7. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf
IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.
AP2281 Rev. 4
13 of 13 www.diodes.com
FEBRUARY 2009
(c) Diodes Incorporated

▲Up To Search▲

Price & Availability of AP2281-1FMG-7

	To Download AP2281-1FMG-7 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .