AP2331W [DIODES]
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH;
| 型号： | AP2331W |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | 0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH |
| 文件： | 总11页 (文件大小：242K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Description
Pin Assignments
The AP2331 is single channel current-limited integrated high-side
power switches optimized for hot-swap applications. The devices
have fast short-circuit response time for improved overall system
robustness and provide a complete protection solution for application
subject to heavy capacitive loads and the prospect of short circuit. It
offers reverse-current blocking, over-current, over-temperature and
short-circuit protection, as well as controlled rise time and under-
voltage lockout functionality.
(Top View)
GND
OUT
IN
The device is available in SOT23 and SC59 packages.
SOT23
Features
•
•
•
•
•
•
•
•
•
•
•
•
Input voltage range: 2.7V – 5.2V
Fast short-circuit response time
0.4A accurate current limiting
(Top View)
GND
OUT
250mΩ on-resistance
Reverse-current blocking
IN
Built-in soft-start with 0.7ms typical turn-on time
Over-current protection
Over-voltage protection
Short-circuit and thermal protection
ESD protection: 3KV HBM, 300V MM
Ambient temperature range: -40°C to +85°C
Available in “Green” molding compound (No Br, Sb)
SC59
Applications
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
•
•
•
•
•
LCD TVs & Monitors
•
UL recognized, file number E322375
IEC60950-1 CB scheme certified
Set-Top-Boxes, Residential Gateways
Laptops, Desktops, Servers
•
Printers, Docking Stations, HUBs
Smart phones, e-Readers
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds
Typical Application Circuit
Power Supply
2.7V to 5.2V
IN
OUT
Load
0.1µF
0.1µF
GND
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Pin Descriptions
Pin Name
GND
Pin Number
Descriptions
1
2
3
GND
OUT
Switch output pin
Voltage input pin
IN
Absolute Maximum Ratings
Symbol
Parameter
Ratings
Units
KV
V
ESD HBM
ESD MM
VIN
Human Body Model ESD Protection
Machine Model ESD Protection
Input Voltage relative to GND
3
300
6.5
V
VOUT
VIN +0.3
Internal Limited
150
Output Voltage relative to GND
Maximum Continuous Load Current
Maximum Junction Temperature
Storage Temperature Range (Note 4)
V
ILOAD
A
TJMAX
TST
°C
°C
-65 to +150
Note: 4. UL Recognized Rating from -30°C to +70°C (Diodes qualified T from -65°C to +150°C)
ST
Recommended Operating Conditions
Symbol
VIN
Parameter
Input voltage relative to GND
Output Current
Min
2.7
0
Max
5.2
Units
V
A
IOUT
TA
0.2
Operating Ambient Temperature
-40
+85
°C
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Electrical Characteristics (TA = 25°C, VIN = +5.0V, unless otherwise stated.)
Symbol
VUVLO
IQ
Parameter
Test Conditions (Note 5)
VIN rising
Min
Typ.
Max
2.65
125
0.10
350
0.5
Unit
V
Input UVLO
2.35
Above UVLO, IOUT = 0
Input quiescent current
Reverse leakage current
Switch on-resistance
85
0.01
250
0.4
µA
µA
mΩ
A
IREV
VIN = 0V, VOUT = 5V, IREV at VIN
RDS(ON)
ILIMIT
IOS
VIN = 5V, IOUT = 0.2A
100
0.3
0.3
VIN = 5V, VOUT = 4V
Over-load current limit
Short-circuit current
OUT shorted to ground
VIN = 5.0V, VOUT = 5.2V
0.4
0.5
A
IROCP
Reverse-current trigger point
0.20
0.25
A
Deglitch time from reverse current trigger
to MOSFET turn off
TTRIG
VOVP
TOVP
(Note 6)
(Note 7)
0.5
5.3
0.7
1.0
5.6
ms
V
Output over-voltage trip point
Debounce time from output over-voltage
to MOSFET turn off
15
101%
0.7
µs
Recovery after turn-off from ROCP and
OVP
VREC
VIN
ms
CL = 0.1µF, RLOAD = 20Ω
TON
Output turn-on time (Note 8)
(UVLO to 90% VOUT-NOM
)
TSHDN
THYS
V
IN = 2.7V to 5.2V
Thermal shutdown threshold
Thermal shutdown hysteresis
150
20
°C
°C
SOT23
SC59
215
255
oC/W
oC/W
Thermal Resistance Junction-to-Ambient
(Note 9)
θJA
Notes:
5. Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately.
6. When reverse current triggers at I
turned off.
= 0.20A, the reverse current is continuously clamped at I
for 0.7ms deglitch time until MOSFET is
ROCP
ROCP
7. During output over-voltage protection, the output draws approximately 60µA current.
8. Since the output turn-on slew rate is dependent on input supply slew rate, this limit is only applicable for input supply slew rate between V /0.2ms to
IN
V /1ms.
IN
9. Device mounted on FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout.
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Typical Performance Characteristics
UVLO Increasing
UVLO Decreasing
1ms/div
5ms/div
Over-Load Current Limit
Short-Circuit Current Limit
5ms/div
100µs/div
Deglitch Time from Reverse-Current Trigger to
MOSFET Turn-Off
Reverse-Current Limit
550µs
200mA
200µs/div
200µs/div
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Typical Performance Characteristics (cont.)
Output Over-Voltage Trip Point
Output Turn-On Time
OVP at 5.4V
OVP recovery
at 5.1V
CL=0.1µF
Rload=20Ω
10ms/div
200µs/div
140
120
100
0.408
0.406
V
= 5V
IN
V
= 2.7V
IN
0.404
0.402
0.400
V
= 5.2V
IN
V
= 3.3V
IN
80
60
40
20
0.398
0.396
0.394
0.392
0.390
0.388
V
= 2.7V
IN
V
= 3.3V
IN
V
V
= 5V,
IN
IN
= 5.2V
C
= 10µF
L
0
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
Fig. 2 Short Circuit Current Limit vs.
Ambient Temperature
AMBIENT TEMPERATURE (°C)
Fig. 1 Quiescent Supply Current vs.
Ambient Temperature
0.45
0.40
500
450
400
350
300
250
200
150
100
V
= 2.7V
IN
V
= 3.3V
IN
0.35
0.30
0.25
0.20
V
= 5V
IN
V
= 5.5V
IN
C
R
= 1µF
L
L
= 5
Ω
50
0
-40
-20
0
20
40
60
C)
80
2.5
3.0
3.5
INPUT VOLTAGE (V)
Fig. 3 Output Turn On-Time vs. Input Voltage
4.0
4.5
5.0
5.5
AMBIENT TEMPERATURE (
Fig. 4 Switch On-Resistance vs.
Ambient Temperature
°
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Typical Performance Characteristics (cont.)
500
450
400
0.402
0.400
0.398
0.396
0.394
0.392
0.390
0.388
V
= 2.7V
IN
350
300
250
200
V
= 3.3V
IN
150
100
50
V
= 5V
IN
0
-40
-40
-20
0
20
40
60
C)
80
-20
0
20
40
60
C)
80
AMBIENT TEMPERATURE (
°
AMBIENT TEMPERATURE (
°
Fig. 5 Current Limit Trip Threshold vs.
Ambient Temperature
Fig. 6 Reverse Current Limit vs.
Ambient Temperature
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Application information
Under-Voltage Lockout (UVLO)
Over-Current and Short-Circuit Protection
An internal sensing FET is employed to check for over current
conditions. Unlike current-sense resistors, sense FETs do not
increase the series resistance of the current path. When an over
current condition is detected, the device maintains a constant
output current and reduces the output voltage accordingly.
Complete shutdown occurs only if the fault stays long enough to
activate thermal limiting.
Under-voltage lockout function (UVLO) guarantees that the
internal power switch is initially off during start-up. The UVLO
functions only when the power supply has reached at least 2.5V
(TYP). Whenever the input voltage falls below approximately
2.5V, the power switch is turned off. This facilitates the design of
hot-insertion systems where it is not possible to turn off the power
switch before input power is removed.
The different overload conditions and the corresponding response
of the AP2331 are outlined below:
S.NO
Conditions
Explanation
Behavior of the AP2331
Output is shorted before input
Short-circuit condition at start-up voltage is applied or before
the part is powered up.
The IC senses the short circuit and immediately clamps
output current to a certain safe level namely ILIMIT
1
• At the instance the overload occurs, higher current may
flow for a very short period of time before the current limit
function can react.
• After the current limit function has tripped (reached the
over-current trip threshold), the device switches into
Short-Circuit or Overload
Short-circuit or Over current
condition
condition that occurs when
the part is powered up and
above UVLO.
2
3
current limiting mode and the current is clamped at ILIMIT
.
The current rises until ILIMIT. Once the threshold has been
reached, the device switches into its current limiting mode
Gradual increase from nominal
operating current to ILIMIT
Load increases gradually until
the current-limit threshold.
and is clamped at ILIMIT
.
Reverse-Current Protection
power switch off thus preventing the power switch from damage.
Hysteresis in the thermal sense circuit allows the device to cool
down to approximately +20°C before the output is turned back on.
This built-in thermal hysteresis feature is an excellent feature, as it
avoids undesirable oscillations of the thermal protection circuit.
The switch continues to cycle in this manner until the load fault is
removed, resulting in a pulsed output.
The USB specification does not allow an output device to source
current back into the USB port. In a normal MOSFET switch,
current will flow in reverse direction (from the output side to the
input side) when the output side voltage is higher than the input
side. A reverse current limit feature is implemented in the AP2331
to limit such back currents. Reverse current limit is always active
in AP2331. Reverse current is limited at IROCP level and when
the fault exists for more than 700µs, output device is disabled and
shutdown. This is called the "Deglitch time from reverse current
trigger to MOSFET turn off”. Recovery from IROCP occurs when
the output voltage falls to 101% of input voltage.
Discharge Function
When input voltage falls below UVLO, the discharge function is
active. The output capacitor is discharged through an internal
NMOS that has a discharge resistance of 800Ω. Hence, the output
voltage drops down to zero. The time taken for discharge is
dependent on the RC time constant of the resistance and the
output capacitor. Discharge time is calculated when UVLO falling
threshold is reached to output voltage reaching 300mV.
Over-Voltage Protection
The device has an output over-voltage protection that triggers
when the output voltage reaches 5.3V(MIN). When this fault
condition stays on for longer than 15µs, (This is called the
“Debounce time from output over-voltage to MOSFET turn off”)
output device is disabled and shutdown. Recovery from ROVP
occurs when the output voltage falls to 101% of input voltage.
Power Dissipation and Junction Temperature
The low on-resistance of the internal MOSFET allows the small
surface-mount packages to pass large current. Using the
maximum operating ambient temperature (TA) and RDS(ON), the
power dissipation can be calculated by:
Thermal Protection
Thermal protection prevents the IC from damage when the die
temperature exceeds safe margins. This mainly occurs when
heavy-overload or short-circuit faults are present for extended
periods of time. The AP2331 implements a thermal sensing to
monitor the operating junction temperature of the power
distribution switch. Once the die temperature rises to
approximately +150°C, the Thermal protection feature gets
activated as follows: The internal thermal sense circuitry turns the
P
D = RDS(ON) × I2
Finally, calculate the junction temperature:
TJ = PD x RθJA + TA
Where:
TA= Ambient temperature °C
RθJA = Thermal resistance
P
D = Total power dissipation
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Ordering Information (cont.)
AP 2331 X - 7
Package
Packing
SA : SOT23
W : SC59
7 : Tape & Reel
7” Tape and Reel
Packaging
Device
Package Code
(Note 10)
SOT23
SC59
Quantity
Part Number Suffix
AP2331SA-7
AP2331W-7
SA
W
3000/Tape & Reel
3000/Tape & Reel
-7
-7
Note:
10. 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.
Marking Information
(1) SOT23
Device
Package
Identification Code
AP2331SA-7
SOT23
KJ
(2) SC59
( Top View )
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
XX Y W X
X : A~Z : Internal code
1
2
Device
Package
Identification Code
AP2331W-7
SC59
KN
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Package Information (All Dimensions in mm)
Package Type:
(1) SOT23
A
SOT23
Dim
A
B
C
D
F
G
H
J
K
Min
Max
0.51
1.40
2.50
1.03 0.915
0.60 0.535
Typ
0.40
1.30
2.40
0.37
1.20
2.30
0.89
0.45
1.78
2.80
0.013 0.10
0.903 1.10
-
C
B
2.05
3.00
1.83
2.90
0.05
1.00
0.400
0.55
0.11
-
H
G
M
K
J
K1
K1
L
M
-
D
0.45
0.085 0.18
0° 8°
0.61
F
L
α
All Dimensions in mm
(2) SC59
A
SC59
Dim
A
B
Min
0.35
1.50
2.70
-
Max
0.50
1.70
3.00
-
Typ
0.38
1.60
2.80
0.95
1.90
3.00
0.05
1.10
0.40
0.15
0.75
-
C
B
C
D
G
H
G
H
-
-
2.90
0.013 0.10
3.10
J
K
1.00
0.35
0.10
0.70
0°
1.30
0.55
0.20
0.80
8°
K
M
L
N
M
N
α
J
L
D
All Dimensions in mm
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Suggested Pad Layout
(1) SOT23
Dimensions Value (in mm)
Y
Z
X
Y
C
E
2.9
0.8
0.9
2.0
Z
C
1.35
E
X
(2) SC59
Y
Dimensions Value (in mm)
Z
C
Z
X
Y
C
E
3.4
0.8
1.0
2.4
1.35
X
E
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability
arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any
license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described
herein 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 Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized
sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without
the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements
concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2012, Diodes Incorporated
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© Diodes Incorporated
AP2331
Document Number: DS35529 Rev. 4 - 2
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