Diodes AP2331 0.2a single channel current-limited load switch Datasheet

AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Description
Pin Assignments
The AP2331 is single channel current-limited integrated high-side
(Top View)
power switches optimized for hot-swap applications. The devices
have fast short-circuit response time for improved overall system
GND
robustness and provide a complete protection solution for application
subject to heavy capacitive loads and the prospect of short circuit. It
IN
offers reverse-current blocking, over-current, over-temperature and
short-circuit protection, as well as controlled rise time and undervoltage lockout functionality.
OUT
NEW PRODUCT
The device is available in SOT23 and SC59 packages.
SOT23
Features
•
Input voltage range: 2.7V – 5.2V
•
Fast short-circuit response time
(Top View)
•
0.4A accurate current limiting
•
250mΩ on-resistance
•
Reverse-current blocking
•
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
•
GND
IN
OUT
SC59
Available in “Green” molding compound (No Br, Sb)
ƒ
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
ƒ
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
•
LCD TVs & Monitors
•
UL recognized, file number E322375
•
Set-Top-Boxes, Residential Gateways
•
IEC60950-1 CB scheme certified
•
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
AP2331
Document Number: DS35529 Rev. 4 - 2
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AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Pin Descriptions
NEW PRODUCT
Pin Name
Pin Number
Descriptions
GND
1
GND
OUT
2
Switch output pin
IN
3
Voltage input pin
Absolute Maximum Ratings
Symbol
ESD HBM
Human Body Model ESD Protection
ESD MM
Machine Model ESD Protection
VIN
Output Voltage relative to GND
ILOAD
Maximum Continuous Load Current
TST
Ratings
Units
3
KV
300
V
Input Voltage relative to GND
VOUT
TJMAX
Note:
Parameter
6.5
V
VIN +0.3
V
Internal Limited
A
150
°C
-65 to +150
°C
Maximum Junction Temperature
Storage Temperature Range (Note 4)
4. UL Recognized Rating from -30°C to +70°C (Diodes qualified TST from -65°C to +150°C)
Recommended Operating Conditions
Symbol
Parameter
VIN
Input voltage relative to GND
IOUT
Output Current
TA
Operating Ambient Temperature
AP2331
Document Number: DS35529 Rev. 4 - 2
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Min
Max
Units
2.7
5.2
V
0
0.2
A
-40
+85
°C
May 2012
© Diodes Incorporated
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Electrical Characteristics (TA = 25°C, VIN = +5.0V, unless otherwise stated.)
Symbol
VUVLO
IQ
IREV
NEW PRODUCT
RDS(ON)
ILIMIT
IOS
IROCP
TTRIG
VOVP
TOVP
VREC
Parameter
Test Conditions (Note 5)
Min
Input UVLO
VIN rising
Input quiescent current
Above UVLO, IOUT = 0
Reverse leakage current
VIN = 0V, VOUT = 5V, IREV at VIN
Switch on-resistance
VIN = 5V, IOUT = 0.2A
100
Over-load current limit
VIN = 5V, VOUT = 4V
0.3
Short-circuit current
OUT shorted to ground
0.3
Reverse-current trigger point
VIN = 5.0V, VOUT = 5.2V
Deglitch time from reverse current trigger
to MOSFET turn off
Output over-voltage trip point
(Note 6)
0.5
(Note 7)
5.3
Debounce time from output over-voltage
to MOSFET turn off
Recovery after turn-off from ROCP and
OVP
Typ.
Max
Unit
2.65
V
85
125
µA
0.01
0.10
µA
250
350
mΩ
0.4
0.5
A
2.35
0.4
0.5
A
0.20
0.25
A
0.7
1.0
ms
5.6
V
15
µs
101%
VIN
ms
TON
Output turn-on time (Note 8)
CL = 0.1µF, RLOAD = 20Ω
(UVLO to 90% VOUT-NOM)
0.7
TSHDN
Thermal shutdown threshold
VIN = 2.7V to 5.2V
150
°C
THYS
Thermal shutdown hysteresis
20
°C
θJA
Notes:
Thermal Resistance Junction-to-Ambient
(Note 9)
SOT23
SC59
215
o
255
o
C/W
C/W
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 IROCP = 0.20A, the reverse current is continuously clamped at IROCP for 0.7ms deglitch time until MOSFET is
turned off.
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 VIN/0.2ms to
VIN/1ms.
9. Device mounted on FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout.
AP2331
Document Number: DS35529 Rev. 4 - 2
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AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
NEW PRODUCT
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
AP2331
Document Number: DS35529 Rev. 4 - 2
200µs/div
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AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Typical Performance Characteristics (cont.)
Output Turn-On Time
Output Over-Voltage Trip Point
OVP recovery
at 5.1V
CL=0.1µF
Rload=20Ω
10ms/div
200µs/div
0.408
SUPPLY CURRENT (µA)
120
SHORT CIRCUIT CURRENT (mA)
140
VIN = 5V
VIN = 5.2V
100
80
VIN = 2.7V
60
VIN = 3.3V
40
20
0.406
0
-40
VIN = 2.7V
0.404
0.402
VIN = 3.3V
0.400
0.398
0.396
0.394
0.392
0.390
0.388
-40
-20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
Fig. 1 Quiescent Supply Current vs.
Ambient Temperature
0.45
VIN = 5V,
VIN = 5.2V
CL = 10µF
-20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
Fig. 2 Short Circuit Current Limit vs.
Ambient Temperature
500
VIN = 2.7V
ON-STATE RESISTANCE (mΩ)
450
OUTPUT TURN ON-TIME (ms)
NEW PRODUCT
OVP at 5.4V
0.40
0.35
0.30
0.25
C L = 1µF
R L = 5Ω
0.20
2.5
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
Fig. 3 Output Turn On-Time vs. Input Voltage
Document Number: DS35529 Rev. 4 - 2
VIN = 3.3V
350
300
250
200
VIN = 5V
150
100
VIN = 5.5V
50
3.0
AP2331
400
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0
-40
-20
0
20
40
60
AMBIENT TEMPERATURE (°C)
Fig. 4 Switch On-Resistance vs.
Ambient Temperature
80
May 2012
© Diodes Incorporated
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Typical Performance Characteristics (cont.)
500
REVERSE CURRENT LIMIT (mA)
0.402
SUPPLY CURRENT (µA)
NEW PRODUCT
0.400
0.398
0.396
0.394
0.392
0.390
0.388
-40
450
VIN = 2.7V
400
350
300
250
200
150
100
50
0
-40
-20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
Fig. 5 Current Limit Trip Threshold vs.
Ambient Temperature
AP2331
Document Number: DS35529 Rev. 4 - 2
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VIN = 3.3V
VIN = 5V
-20
0
20
40
60
AMBIENT TEMPERATURE (°C)
Fig. 6 Reverse Current Limit vs.
Ambient Temperature
80
May 2012
© Diodes Incorporated
AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
NEW PRODUCT
Application information
Under-Voltage Lockout (UVLO)
Over-Current and Short-Circuit Protection
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.
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.
The different overload conditions and the corresponding response
of the AP2331 are outlined below:
S.NO
Conditions
1
Short-circuit condition at start-up
Explanation
Output is shorted before input
voltage is applied or before
the part is powered up.
Behavior of the AP2331
The IC senses the short circuit and immediately clamps
output current to a certain safe level namely ILIMIT
2
Short-circuit or Over current
condition
Short-Circuit or Overload
condition that occurs when
the part is powered up and
above UVLO.
3
Gradual increase from nominal
operating current to ILIMIT
Load increases gradually until
the current-limit threshold.
• 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
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
and is clamped at ILIMIT.
Reverse-Current Protection
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.
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.
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
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.
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.
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:
2
PD = RDS(ON) × I
Finally, calculate the junction temperature:
TJ = PD x RθJA + TA
Where:
TA= Ambient temperature °C
RθJA = Thermal resistance
PD = Total power dissipation
AP2331
Document Number: DS35529 Rev. 4 - 2
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AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Ordering Information (cont.)
NEW PRODUCT
AP 2331 X - 7
Package
Packing
SA : SOT23
W : SC59
7 : Tape & Reel
7” Tape and Reel
Packaging
Device
Package Code
AP2331SA-7
SA
SOT23
3000/Tape & Reel
-7
AP2331W-7
W
SC59
3000/Tape & Reel
-7
Note:
(Note 10)
Quantity
Part Number Suffix
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)
(2)
SOT23
Device
Package
Identification Code
AP2331SA-7
SOT23
KJ
SC59
( Top View )
3
XX Y W X
1
AP2331
Document Number: DS35529 Rev. 4 - 2
2
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 : Internal code
Device
Package
Identification Code
AP2331W-7
SC59
KN
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AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Package Information (All Dimensions in mm)
Package Type:
(1) SOT23
A
NEW PRODUCT
B C
H
K
M
K1
D
J
F
L
G
SOT23
Dim
Min
Max
Typ
A
0.37
0.51
0.40
B
1.20
1.40
1.30
C
2.30
2.50
2.40
D
0.89
1.03 0.915
F
0.45
0.60 0.535
G
1.78
2.05
1.83
H
2.80
3.00
2.90
J
0.013 0.10
0.05
K
0.903 1.10
1.00
K1
0.400
L
0.45
0.61
0.55
M
0.085 0.18
0.11
0°
8°
α
All Dimensions in mm
(2) SC59
A
B C
G
H
K
J
M
N
D
AP2331
Document Number: DS35529 Rev. 4 - 2
SC59
Min
Max
Typ
0.35
0.50
0.38
B
1.50
1.70
1.60
C
2.70
3.00
2.80
D
0.95
G
1.90
H
2.90
3.10
3.00
J
0.013 0.10
0.05
K
1.00
1.30
1.10
L
0.35
0.55
0.40
M
0.10
0.20
0.15
N
0.70
0.80
0.75
0°
8°
α
All Dimensions in mm
Dim
A
L
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AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
Suggested Pad Layout
(1) SOT23
Dimensions Value (in mm)
Z
2.9
X
0.8
Y
0.9
2.0
C
1.35
E
Y
NEW PRODUCT
Z
C
E
X
(2) SC59
Y
Z
C
X
AP2331
Document Number: DS35529 Rev. 4 - 2
Dimensions Value (in mm)
Z
3.4
X
0.8
Y
1.0
2.4
C
1.35
E
E
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AP2331
0.2A SINGLE CHANNEL CURRENT-LIMITED LOAD SWITCH
IMPORTANT NOTICE
NEW PRODUCT
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.
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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
www.diodes.com
AP2331
Document Number: DS35529 Rev. 4 - 2
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