AP2151A
0.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH
Description
The AP2151A is an integrated high-side power switches optimized for
Universal Serial Bus (USB) and other hot-swap applications. The
family of devices complies with USB 2.0 and is available with active
high Enable input. They offer current and thermal limiting and short
circuit protection as well as controlled rise time and under-voltage
lockout functionality. A 7ms deglitch capability on the open-drain Flag
output prevents false over-current reporting and does not require any
external components.
AP2151A is available in SO-8, MSOP-8EP, SOT25 and U-DFN2018-
6 packages.
Pin Assignments
(Top View)
GND
1
IN
2
IN
3
EN
4
8
NC
7
6
5
OUT
OUT
FLG
SO-8
(Top View)
GND
IN
IN
EN
1
2
3
4
8
7
6
5
Features
Single USB Port Power Switches
Over-Current and Thermal Protection
0.8A Accurate Current Limiting
Reverse Current Blocking
95mΩ On-Resistance
Input Voltage Range: 2.7V to 5.5V
0.6ms Typical Rise Time
Very Low Shutdown Current: 1µA (Max)
Fault Report (FLG) with Blanking Time (7ms Typ)
ESD Protection: 4kV HBM, 400V MM
Active High Enable
Ambient Temperature Range -40° to +85°
C
C
SOT25, SO-8, MSOP-8EP (Exposed Pad) and U-DFN2018-6:
Available in “Green” Molding Compound (No Br, Sb)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
15kV ESD Protection per IEC 61000-4-2 (With External
Capacitance)
UL Recognized, File Number E322375
IEC60950-1 CB Scheme Certified
NC
OUT
OUT
FLG
MSOP-8EP
(Top View)
OUT
GND
FLG
1
2
3
4
EN
5
IN
SOT25
(Top View)
GND
IN
1
6
OUT
OUT
FLG
2
5
Applications
Consumer Electronics – LCD TVs & Monitors, Game Machines
Communications – Set-Top-Boxes, GPS Systems, Smartphones
Computing – Laptops, Desktops, Servers, Printers, Docking
Stations, HUBs
EN
3
4
U-DFN2018-6
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ 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.
AP2151A
Document number: DS37615 Rev. 2 - 2
1 of 18
www.diodes.com
January 2018
© Diodes Incorporated
AP2151A
Typical Applications Circuit
AP2151A Enable Active High
Power Supply
2.7V to 5.5V
10k
10μF
0.1μF
IN
OUT
0.1μF
Load
120μF
FLG
EN
ON
OFF
GND
Available Options
Part Number
AP2151A
Channel
1
Enable Pin (EN)
Active High
Current Limit (Typical)
0.8A
Recommended Maximum Continuous Load Current
0.5A
Pin Descriptions
Pin
Name
GND
IN
EN
FLG
OUT
NC
Exposed
Pad
SO-8
1
2, 3
4
5
6, 7
8
—
Pin Number
MSOP-8EP
SOT25
1
2, 3
4
5
6, 7
8
Exposed
Pad
2
5
4
3
1
N/A
—
U-DFN2018-6
1
2
3
4
5, 6
N/A
Exposed
Pad
Function
Ground
Voltage Input Pin (all IN pins must be tied together externally).
Enable Input. Active High (AP2151A).
Over-Current and Over-Temperature Fault Report.
Open-Drain Flag is Active Low When Triggered
Voltage Output Pin (all OUT pins must be tied together externally).
No internal connection; recommend tie to OUT pins
Exposed Pad.
It should be externally connected to GND plane and thermal mass for
enhanced thermal impedance.
It should not be used as electrical ground conduction path.
AP2151A
Document number: DS37615 Rev. 2 - 2
2 of 18
www.diodes.com
January 2018
© Diodes Incorporated
AP2151A
Functional Block Diagram
AP2141A, AP2151A
Current
Sense
IN
OUT
UVLO
Driver
Current
Limit
EN
FLG
Thermal
Sense
Deglitch
GND
Absolute Maximum Ratings
(@T
A
= +25° unless otherwise specified.)
C,
Symbol
HBM
MM
ESD
MM
IEC system
level
V
IN
V
OUT
V
EN ,
V
FLG
I
LOAD
T
J(MAX)
T
ST
Caution:
Parameter
Human Body Model ESD Protection
Machine Model ESD Protection
for SO-8, MSOP-8EP, SOT25 packages
Machine Model ESD Protection
for U-DFN2018-6, SO-8 packages
Surges per EN61000-4-2. 1999 applied to
output terminals of EVM (Note 5)
Surges per EN61000-4-2. 1999 applied to
output terminals of EVM (Note 5)
Ratings
4
400
300
Air
Contact
15
8
6.5
V
IN
+0.3
6.5
Internal Limited
+150
-65 to +150
Unit
kV
V
V
kV
kV
V
V
V
A
°
C
°
C
Input Voltage
Output Voltage
Enable Voltage
Maximum Continuous Load Current
Maximum Junction Temperature
Storage Temperature Range (Note 4)
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling
and transporting these devices.
4. UL Recognized Rating from -30° to +70° (Diodes Incorporated qualified T
ST
from -65° to +150°
C
C
C
C).
5. External capacitors need to be connected to the output, EVM board was tested with capacitor 2.2μF 50V 0805.
This level is a pass test only and not a limit.
Notes:
Recommended Operating Conditions
(@T
A
= +25° unless otherwise specified.)
C,
Symbol
V
IN
I
OUT
T
A
V
IL
V
IH
Input Voltage
Output Current
Operating Ambient Temperature
EN Input Logic Low Voltage
EN Input Logic High Voltage
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Parameter
Min
2.7
0
-40
0
2
Max
5.5
500
+85
0.8
V
IN
Unit
V
mA
°
C
V
V
AP2151A
Document number: DS37615 Rev. 2 - 2
January 2018
© Diodes Incorporated
AP2151A
Electrical Characteristics
Symbol
V
UVLO
I
SHDN
I
Q
I
LEAK
I
REV
Input UVLO
Input Shutdown Current
Input Quiescent Current
Input Leakage Current
Reverse Leakage Current
Parameter
R
LOAD
= 1kΩ
Disabled, I
OUT
= 0
Enabled, I
OUT
= 0
Disabled, OUT grounded
Disabled, V
IN
= 0V, V
OUT
= 5V, I
REV
at V
IN
V
IN
= 5V,
I
OUT
= 0.5A
V
IN
= 3.3V,
I
OUT
= 0.5A
I
SHORT
Short-Circuit Current Limit
I
LIMIT
I
TRIG
I
SINK
t
D(ON)
t
R
t
F
R
FLG
t
BLANK
T
SHDN
T
HYS
Over-Load Current Limit
Current Limiting Trigger Threshold
EN Input Leakage
Output Turn-On Delay Time
Output Turn-On Rise Time
Output Turn-Off Fall Time
FLG Output FET On-Resistance
FLG Blanking Time
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Thermal Resistance Junction-to-
Ambient
SO-8 (Note 6)
MSOP-8EP (Note 7)
SOT25 (Note 8)
U-DFN2018-6 (Note 9)
T
A
= +25°
C
SOT25, SO-8, MSOP-8EP
U-DFN2018-6
(@T
A
= +25° V
IN
= +5.0V, unless otherwise specified.)
C,
Conditions
Min
1.6
—
—
—
—
—
—
—
—
—
—
0.6
—
—
—
—
—
—
—
4
—
—
—
—
—
—
—
Typ
1.9
0.5
45
—
1
95
90
—
120
—
0.6
0.8
1.0
—
0.05
0.6
0.01
0.05
20
7
+140
+25
110
60
157
70
Max
2.5
1
70
1
—
115
110
140
140
170
—
1.0
—
1
—
1.5
—
0.1
40
15
—
—
—
—
—
—
A
A
A
µA
ms
ms
ms
ms
Ω
ms
°
C
°
C
°
C/W
°
C/W
°
C/W
°
C/W
mΩ
Unit
V
µA
µA
µA
µA
R
DS(ON)
Switch On-Resistance
-40° ≤ T
A
≤ +85°
C
C
T
A
= +25°
C
-40° ≤ T
A
≤ +85°
C
C
Enabled into short circuit, C
L
= 22µF
V
IN
= 5V, V
OUT
= 4.8V, C
L
= 22µF, -40C ≤ T
A
≤ +85°
C
Output Current Slew Rate (<100A/s), C
L
= 22µF
V
EN
= 5V
C
L
= 1µF, R
LOAD
= 10Ω
C
L
= 1µF, R
LOAD
= 10Ω
C
L
= 1µF, R
LOAD
= 10Ω
C
L
= 1µF, R
LOAD
= 10Ω
I
FLG
=10mA
C
IN
= 10µF, C
L
= 22µF
Enabled, R
LOAD
= 1kΩ
t
D(OFF)
Output Turn-Off delay Time
θ
JA
Notes:
6. Test condition for SO-8: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout.
7. Test condition for SO-8, MSOP-8EP: Device mounted on 2” x 2” FR-4 substrate PC board, 2oz copper, with minimum recommended pad on top layer
and thermal vias to bottom layer ground plane.
8. Test condition for SOT25: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout.
9. Test condition for U-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” x 1.4” ground plane.
AP2151A
Document number: DS37615 Rev. 2 - 2
4 of 18
www.diodes.com
January 2018
© Diodes Incorporated
AP2151A
Typical Performance Characteristics
50%
50%
V
EN
V
EN
T
D(OFF)
T
F
50%
50%
T
R
T
D(ON)
10%
90%
t
R
T
R
t
D(ON)
T
D(ON)
90%
10%
T
D(OFF)
t
D(OFF)
t
T
F
F
90%
10%
90%
10%
V
OUT
V
OUT
Figure 1. Voltage Waveforms: AP2151A
All Enable Plots are for AP2151A Active High
Turn-On Delay and Rise Time
Turn-Off Delay and Fall Time
V
EN
5V/div
V
EN
5V/div
V
OUT
2V/div
C
L
= 1µF
T
A
= +25°
C
R
L
=10Ω
500µs/div
V
OUT
2V/div
C
L
= 1µF
T
A
= +25°
C
R
L
=10Ω
500µs/div
Turn-On Delay and Rise Time
Turn-Off Delay and Fall Time
V
EN
5V/div
V
EN
5V/div
V
OUT
2V/div
C
L
= 1µF
T
A
= +25°
C
R
L
=10Ω
500µs/div
V
OUT
2V/div
C
L
= 1µF
T
A
= +25°
C
R
L
=10Ω
500µs/div
AP2151A
Document number: DS37615 Rev. 2 - 2
5 of 18
www.diodes.com
January 2018
© Diodes Incorporated
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