Diodes AP2181, AP2191 User Manual

AP2181/ AP2191

1.5A SINGLE CHANNEL CURRENT-LIMITED POWER SWITCH

Description

The AP2181 and AP2191 are 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
available with both polarities of 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.

All devices are available in SO-8, MSOP-8EP, SOT25 and
U-DFN2018-6 packages.

Pin Assignments

GND

IN

EN

( Top View )

1

2

3

IN

4

SO-8

8

NC

7

OUT

6

OUT

5

FLG

Features

 Single USB Port Power Switches
 Over-Current and Thermal Protection
 2.1A Accurate Current Limiting
 Reverse Current Blocking
 95m On-Resistance
 Input Voltage Range: 2.7V – 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, 300V MM
 Active Low (AP2181) or Active High (AP2191) Enable
 Ambient Temperature Range: -40°C to +85°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)

 UL Recognized, File Number E322375
 IEC60950-1 CB Scheme Certified

GND

IN

( Top View )

1

2

3

6

5

4

OUT
OUT
FLGEN

Applications

 Consumer electronics – LCD TV & Monitor, Game Machines
 Communications – Set-Top-Box, GPS, Smartphone
 Computing – Laptop, Desktop, Servers, Printers, Docking

Station, HUB

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/quality/lead_free.html 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.

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

www.diodes.com

1 of 17

U-DFN2018-6

March 2013

© Diodes Incorporated

Typical Applications Circuit

AP2191 Enable Active High

AP2181/ AP2191

Power Supply

2.7V to 5.5V

10uF

10k

ON

OFF

IN

0.1uF

FLG

EN

GND

OUT

0.1uF
120uF

Load

Available Options

Part Number Channel Enable Pin (EN)

AP2181 1 Active Low 2.1A 1.5A
AP2191 1 Active High 2.1A 1.5A

Current Limit

(typ)

Recommended Maximum Continuous

Load Current

Pin Descriptions

Pin

Name

GND 1 1 2 1 Ground

IN

EN 4 4 4 3 Enable input, active low (AP2181) or active high (AP2191)

FLG 5 5 3 4

OUT

NC

Exposed tab - Exposed tab - Exposed tab

SO-8 MSOP-8EP SOT25 U-DFN2018-6

2, 3 2, 3 5 2 Voltage input pin (all IN pins must be tied together externally )

6, 7 6, 7 1 5, 6 Voltage output pin (all OUT pins must be tied together externally )

8 8 N/A N/A No internal connection; recommend tie to OUT pins

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

Pin Number

Function

Over-current and over-temperature fault report; open-drain flag is active low w hen
triggered

Exposed pad.
It should be connected to GND and thermal mass for enhanced thermal

impedance. It sho u l d n ot be used a s elect rical g r ound c o n ducti o n path.

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Functional Block Diagram

AP2181/ AP2191

AP2181, AP2191

Current

Sense

Current

Limit

Deglitch

GND

EN

IN

UVLO

Driver

Thermal

Sense

OUT

FLG

Absolute Maximum Ratings (@T

= +25°C, unless otherwise specified.)

A

Symbol Parameter Ratings Units

ESD HBM Human Body Model ESD Protection 4 kV

Machine Model ESD Protection

ESD MM

for MSOP-8EP, SOT25 packages
Machine Model ESD Protection

for U-DFN2018-6, SO-8 packages

VIN

V

OUT

V

EN , VFLG

I

LOAD

T

J(MAX)

TST

Caution: 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

Note: 4. UL Recognized Rating from -30°C to +70°C (Diodes qualified

Input Voltage 6.5 V
Output Voltage
Enable Voltage 6.5 V
Maximum Continuous Load Current Internal Limited A
Maximum Junction Temperature 150 °C
Storage Temperature Range (Note 4) -65 to +150 °C

T

from -65°C to +150°C)

ST

400 V

300 V

VIN +0.3

V

Recommended Operating Conditions (@T

= +25°C, unless otherwise specified.)

A

Symbol Parameter Min Max Units

V

IN

I

OUT

T

A

VIH High-Level Input Voltage on EN or EN

VIL Low-Level Input Voltage on EN or EN

Input voltage 2.7 5.5 V
Output Current 0 1.5 A
Operating Ambient Temperature -40 85

2.0 V

V

IN

C

0 0.8 V

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

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AP2181/ AP2191

Electrical Characteristics (@T

Symbol Parameter Test Conditions Min Typ Max Unit

V

I

R

I

SHORT

T

T

T

T

Notes: 5. Test condition for SO-8: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout.

6. Test condition for 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.

7. Test condition for SOT25: Device mounted on FR-4, 2oz copper, with minimum recommended pad layout.
layer 1.0”x1.4” ground plane.

Input UVLO

UVLO

Input Shutdown Current

SHDN

Input Quiescent Current

I

Q

Input Leakage Current Disabled, OUT grounded 1 µA

I

LEAK

Reverse Leakage Current

I

REV

Switch On-Resistance

DS(ON)

Short-Circuit Current Limit
Over-Load Current Limit

I

LIMIT

Current Limiting Trigger Threshold

I

Trig

EN Input Logic Low Voltage

V

IL

EN Input Logic High Voltage

V

IH

EN Input Leakage

I

SINK

Output Turn-On delay time

D(ON)

Output Turn-On rise time

TR

Output Turn-Off delay time

D(OFF)

Output Turn-Off fall time

TF

FLG Output FET On-Resistance

R

FLG

FLG Blanking Time

Blank

Thermal Shutdown Threshold

SHDN

Thermal Shutdown Hysteresis 25

T

HYS

Thermal Resistance Junction-to-



JA

Ambient

8. 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

= +25°C, VIN = +5V, unless otherwise specified.)

A

R

= 1k

LOAD

Disabled, I
Enabled, I

Disabled, V

= 5V,

V

IN

I

= 1.5A

OUT

VIN = 3.3V,

= 1.5A

I

OUT

= 0

OUT

= 0

OUT

= 0V, V

IN

T

= +25°C

A

OUT

-40C  TA  +85°C
T

= +25°C

A

-40C  T

= 5V, I

REV

at VIN
SOT25, MSOP-8EP, SO-8 95 115
U-DFN2018-6 90 110

 +85°C

A

Enabled into short circuit, CL = 100µF
V

= 5V, V

IN

= 4.5V, CL = 120µF, -40°C  T

OUT

 +85°C

A

Output Current Slew Rate (<100A/s) , CL = 100µF
V

= 2.7V to 5.5V

IN

= 2.7V to 5.5V

V

IN

= 5V

V

EN

CL = 1µF, R
CL = 1µF, R
CL = 1µF, R
CL = 1µF, R
I

= 10mA, CL = 100µF

FLG

C

= 10µF, CL = 100µF

IN

Enabled, R

LOAD
LOAD
LOAD
LOAD

LOAD

= 10
= 10
= 10
= 10

= 1k

1.6 1.9 2.5 V

0.5 1 A
45 70 µA

1 µA

140
120 140
170

2.0 A

1.6 2.1 2.6 A

2.6 A

0.8 V

2 V

1 µA

0.05 ms

0.6 1.5 ms

0.01 ms

0.05 0.1 ms
20 40 

4 7 15 ms

140

SO-8 (Note 5) 110
MSOP-8EP (Note 6) 60
SOT25 (Note 7) 157
U-DFN2018-6 (Note 8) 70

m

C

C
C/W
C/W
C/W
C/W

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

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Typical Performance Characteristics

AP2181/ AP2191

Ven
5V/div

Vout
2V/div

V

EN

V

OUT

50%

T

D(ON)

T

10%

R

Turn-On Delay and Rise Time

V

EN

V

OUT

T

50%

D(ON)

90%

50%

T

D(OFF)

90%

10%

T

F

Figure 1 Voltage Waveforms: AP2181 (left), AP2191 (right)

All Enable Plots are for AP2191 Active High

Turn-Off Delay and Fall Time

Ven
5V/div

Vout
2V/div

CL = 1µF
TA = +25°C
RL = 5

T

10%

50%

T

R

90%

D(OFF)

90%

10%

T

F

CL = 1µF
TA = +25°C
RL = 5

Turn-On Delay and Rise Time

Ven
5V/div

Vout
2V/div

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

400µs/div

400µs/div

Ven
5V/div

Vout
2V/div

CL = 100µF
TA = +25°C
RL = 5

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400µs/div

Turn-Off Delay and Fall Time

400µs/div

CL = 100µF
TA = +25°C
RL = 5

March 2013

© Diodes Incorporated

Typical Performance Characteristics (cont.)

Short Circuit Current,

Device Enabled Into Short

AP2181/ AP2191

Inrush Current

Ven
5V/div

Iout
500mA/div

Vflag
2V/div

Iout
1A/div

V

= 5V

IN
TA = +25°C
CL = 100µF

500µs/div

0.6 Ω Load Connected to Enabled Device

V

IN

TA = +25°C
CL = 100µF

= 5V

Ven
5V/div

CL = 470uF

Iout
500mA/div

CL = 100uF

CL = 220uF

1ms/div

Short Circuit with Blanking Time and Recovery

Vout
5V/div

Vflag
5V/div

Iout
2A/div

= 5V

V

IN

T

= +25°C

A

RL = 3.3

V

= 5V

IN
TA = +25°C
CL = 100µF

Power On

Vflag
5V/div

Iout
500mA/div

Ven
5V/div

Vin
5V/div

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

2ms/div

1ms/div

TA = +25°C
CL = 68µF
RL = 3.3

www.diodes.com

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Vin
2V/div

Iout
500mA/div

20ms/div

UVLO Increasing

1ms/div

TA = +25°C
CL = 68µF
RL = 3.3

© Diodes Incorporated

March 2013

Typical Performance Characteristics (cont.)

UVLO Decreasing

AP2181/ AP2191

Current Limit Response vs Peak Current

Vin
2V/div

Iout
500mA/div

Turn-On Time (us)

TA = +25°C
CL = 68µF
RL = 3.3

10ms/div

Turn-On Time vs I nput Voltage

850

750

650

550

450

350

250

1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

Input V o ltage (V)

CL = 1µF
RL =10

=+

°

45
40
35
30
25
20
15
10

Current Limit Response (us)

5
0

024681012

Peak Current (A)

V

= 5V

IN

TA = +25°C

Turn-Off Tim e vs Input Volta ge

55

50

45

40

35

Turn-Off Time (us)

30

25

1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

Input Vol tage (V)

CL = 1µF
RL = 10

=+

°

Rise Time vs I nput Vol t age

650

600

550

500

450

Rise Time (us)

400

350

300

22.533.544.555.56

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

Input V o ltage (V)

CL = 1µF
RL = 10
TA = +25°C

25

24

23

22

Fall Time (us)

21

20

19

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Fall Ti m e v s I nput Vol t a ge

CL = 1µF
RL = 10

=+

°

22.533.544.555.56

Input Vol tage (V)

March 2013

© Diodes Incorporated

Typical Performance Characteristics (cont.)

Supply Current, Output Enabled vs Ambient Temperature

52

47

Vin = 5.5V

42

37

32

Supply Current, Output Enabled (uA)

27

-60 -40 -20 0 20 40 60 80 100

Static Drain- Source On- Stat e Resist ance vs A m bient

180
170
160
150
140
130
120
110

Resistance (mΩ)

100

Static Drain-S o u rc e On-State

90
80

-60 -40 -20 0 20 40 60 80 100

Vin = 5.0V

Vin = 2.7V

Vin = 3.3V

Ambient Temperatu re (°C)

Temperature

Vin = 2.7V

Vin = 3.3V

Vin = 5V

Ambi ent Temper atu re (°C)

AP2181/ AP2191

Supply Current, Output Disabled vs Ambient Temperature

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

Supply Current, Output Disabled (uA)

0.0

-60 -40 -20 0 20 40 60 80 100

2.60

2.50

2.40

2.30

2.20

2.10

Short-Circuit Output Current (A)

2.00

Vin = 3.3V

Short-Circuit Output Current vs Ambient Temperature

CL = 100uF

Vin = 2.7V

-60 -40 -20 0 20 40 60 80 100

Vin = 5.0V

Ambi ent Temper atu re (°C)

Ambient Temp erat ure (°C)

Vin = 5.5V

Vin = 3.3V

Vin = 2.7V

Vin = 5.0V

Vin = 5.5V

Undervoltage Lockout vs A mbi ent Tem per atur e

2.15

2.10

2.05

2.00

1.95

Undervoltage Lockout (V)

1.90

-60 -40 -20 0 20 40 60 80 100

Ambient Temperature (°C)

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

Threshold Tri p Cur re nt vs Input Voltage

3.24

3.22

UVLO Rising

UVLO Falling

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3.20

3.18

3.16

3.14

3.12

Threshold Trip Current (A)

3.10

3.08

2.83.33.84.34.85.3

Input Voltage (V)

TA = +25°C
CL = 68µF

March 2013

© Diodes Incorporated

AP2181/ AP2191

Application Information

Power Supply Considerations

A 0.01-F to 0.1-F X7R or X5R ceramic bypass capacitor between IN and GND, close to the device, is recommended. Placing a high-value
electrolytic capacitor on the input (10-F minimum) and output pin(s) is recommended when the output load is heavy. This precaution reduces
power-supply transients that may cause ringing on the input. Additionally, bypassing the output with a 0.01-F to 0.1-F ceramic capacitor improves
the immunity of the device to short-circuit transients.

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 overcurrent 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.

Three possible overload conditions can occur. In the first condition, the output has been shorted to GND before the device is enabled or before VIN
has been applied. The AP2181/AP2191 senses the short circuit and immediately clamps output current to a certain safe level namely I

LIMIT

.

In the second condition, an output short or an overload occurs while the device is enabled. At the instance the overload occurs, highe r curr ent m ay
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 I

LIMIT

.

In the third condition, the load has been gradually increased beyond the recommended operating current. The current is permitted to rise until the
current-limit threshold (I

) is reached or until the thermal limit of the device is exceeded. The AP2181/AP2191 is capable of delivering current up

TRIG

to the current-limit threshold without damaging the device. Once the threshold has been reached, the device switches into its current limiting mode
and is set at I

LIMIT

.

Note that when the output has been shorted to GND at extremely low temperature (< -30°C), a minimum 120-F electrolytic capacitor on the output
pin is recommended. A correct capacitor type with capacitor voltage rating and temperature characteristics must be properly chosen so that
capacitance value does not drop too low at the extremely low temperature operation. A recommended capacitor should have temperature
characteristics of less than 10% variation of capacitance change when operated at extremely low temp. Our recommended aluminum electrolytic
capacitor type is Panasonic FC series.

FLG Response

When an over-current or over-temperature shutdown condition is encountered, the FLG open-drain output goes a ctive low after a nominal 7-ms
deglitch timeout. The FLG output remains low until both over-current and over-temperature conditions are removed. Connecting a heavy capacitive
load to the output of the device can cause a momentary over-current condition, which does not trigger the FLG due to the 7-ms deglitch timeout.
The AP2181/AP2191 is designed to eliminate false over-current reporting without the need of external components to remove unwanted pulses.

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 (T

= R

P

D

DS(ON)

× I

) and R

A

2

, the power dissipation can be calculated by:

DS(ON)

Finally, calculate the junction temperature:

= PD x R

T

J

JA

+ TA

Where:

T

= Ambient temperature °C

A

= Thermal resistance

R

JA

P

= Total power dissipation

D

Thermal Protection

Thermal protection prevents the IC from damage when heavy-overload or short-circuit faults are present for extended periods of time. The
AP2181/AP2191 implements a thermal sensing to monitor the operating junction temperature of the power distribution switch. Once the die
temperature rises to approximately 140°C due to excessive power dissipation in an over-current or short-circuit condition the internal thermal sense
circuitry turns the power switch off, thus preventing the power switch from damage. Hysteresis is built into the thermal sense circuit allowing the
device to cool down approximately 25°C before the switch turns back on. The switch continues to cycle in this manner until the load fault or input
power is removed. The FLG open-drain output is asserted when an over-temperature shutdown or over-current occurs with 7-ms deglitch.

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

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AP2181/ AP2191

Application Information (cont.)

Under-Voltage Lockout (UVLO)

Under-voltage lockout function (UVLO) keeps the internal power switch from being turned on until the power supply has reached at least 1.9V, even
if the switch is enabled. Whenever the input voltage falls below approximately 1.9V, the power switch is quickly 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.

Host/Self-Powered HUBs

Hosts and self-powered hubs (SPH) have a local power supply that powers the embedded functions and the downstream ports (see F igure 2). This
power supply must provide from 5.25V to 4.75V to the board side of the downstream connection unde r both full-load and no-load conditions. Hosts
and SPHs are required to have current-limit protection and must report over-current conditions to the USB controller. Typical SPHs are desktop
PCs, monitors, printers, and stand-alone hubs.

Figure 2 Typical One-Port USB Host / Self-Powered Hub

Generic Hot-Plug Applications

In many applications it may be necessary to remove modules or pc boards while the main unit is still operating. These are considered hot-plug
applications. Such implementations require the control of current surges seen by the main power supply and the card being inserted. The most
effective way to control these surges is to limit and slowly ramp the current and voltage being applied to the card, similar to the way in which a
power supply normally turns on. Due to the controlled rise times and fall times of the AP2181/AP2191, these devices can be used to provide a
softer start-up to devices being hot-plugged into a powered system. The UVLO feature of the AP2181/AP2191 also ensures that the switch is off
after the card has been removed, and that the switch is off during the next insertion.

By placing the AP2181/AP2191 between the VCC input and the rest of the circuitry, the input power r eaches these devices first after insertion. The
typical rise time of the switch is approximately 1ms, providing a slow voltage ramp at the output of the device. This implementation controls system
surge current and provides a hot-plugging mechanism for any device.

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

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Ordering Information

AP2181/ AP2191

Part Number Package Code Packaging

AP21X1WG-7 W SOT25 3000/Tape & Reel -7

AP21X1SG-13 S SO-8 2500/Tape & Reel -13

AP21X1MPG-13 MP MSOP-8EP 2500/Tape & Reel -13

AP21X1FMG-7 FM U-DFN2018-6 3000/Tape & Reel -7

Quantity Part Number Suffix

7”/13” Tape and Reel

Marking Information

(1) SO-8

( Top view )

8765

Logo

Part Number

8 : Active Low
9 : Active High

AP21X X

YY WW X X

1 : 1 Channel
G : Green

YY

: Year : 08, 09,10~

WW

: Week : 01~52; 52

represents 52 and 53 week

: Internal Code

X

2

1

(2) MSOP-8EP

34

( Top view )

Part Number

8 : Active Low

9 : Active High

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

Logo

8765

W X E

Y

AP21X X

234

1

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A~Z : Green

MSOP-8L-EP

: Year : 0~9

Y

W

: Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week

1 : 1 Channel

March 2013

© Diodes Incorporated

Marking Information (cont.)

(3) SOT25

AP2181/ AP2191

( Top View )

(4) U-DFN2018-6

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

5

7

4

XX : Identification code

Y

: Year 0~9

W X

XX

Y

W

: Week : A~Z : 1~26 week;

a~z : 27~52 week; z represents
52 and 53 week

X

1 2 3

: A~Z : Green

Device Package type Identification Code

AP2181W SOT25 HX
AP2191W SOT25 HY

(Top View)

XX

YWX

Device Package type Identification Code

AP2181FM U-DFN2018-6 HX
AP2191FM U-DFN2018-6 HY

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

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Package Outline Dimensions (All dimensions in mm.)

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
(1) Package Type: SO-8

E1

E

A1

Detail ‘A’

L

0.254

Gaug e Plane
Seating Plane

7°~9

°

Detail ‘A’

A3

h

°

45

A2

e

b

D

A

(2) Package Type: MSOP-8EP

D

x

y

E

E2

1

e

8Xb

A1

A

D

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

A3

A2

D1

E3

E1

Gauge Plane
Seating Plane

See Detail C

0.25

4

X

1

c

4

X

1

0

°

0

°

L

Detail C

13 of 17

www.diodes.com

a

AP2181/ AP2191

Dim Min Max

Dim Min Max Typ

SO-8

A - 1.75
A1 0.10 0.20
A2 1.30 1.50
A3 0.15 0.25

b 0.3 0.5

D 4.85 4.95

E 5.90 6.10
E1 3.85 3.95

e 1.27 Typ

h - 0.35

L 0.62 0.82

0 8



All Dimensions in mm

MSOP-8EP

A - 1.10 ­A1 0.05 0.15 0.10
A2 0.75 0.95 0.86
A3 0.29 0.49 0.39

b 0.22 0.38 0.30

c 0.08 0.23 0.15

D 2.90 3.10 3.00
D1 1.60 2.00 1.80

E 4.70 5.10 4.90
E1 2.90 3.10 3.00
E2 1.30 1.70 1.50
E3 2.85 3.05 2.95

e - - 0.65

L 0.40 0.80 0.60

a 0° 8° 4°

x - - 0.750

y - - 0.750

All Dimensions in mm

March 2013

© Diodes Incorporated

Package Outline Dimensions (All dimensions in mm.)

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

(3) Package Type: SOT25

A

H

K

J

(4) Package Type: U-DFN2018-6

A

A1

Pin#1 ID

E

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

B C

N

D

e

L

A3

SEATING PLANE

D

D2

L

E2

z

b

M

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AP2181/ AP2191

Dim Min Max Typ

SOT25

A 0.35 0.50 0.38
B 1.50 1.70 1.60
C 2.70 3.00 2.80
D

 

0.95

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°





All Dimensions in mm

U-DFN2018-6

Dim Min Max Typ

A 0.545 0.605 0.575

A1 0 0.05 0.02
A3

 

0.13

b 0.15 0.25 0.20
D 1.750 1.875 1.80

D2 1.30 1.50 1.40

e

 

0.50

E 1.95 2.075 2.00

E2 0.90 1.10 1.00

L 0.20 0.30 0.25

z

 

0.30

All Dimensions in mm

March 2013

© Diodes Incorporated

Suggested Pad Layout

Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.

(1) Package Type: SO-8

(2) Package Type: MSOP-8EP

(3) Package Type: SOT25

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

Y2

X

Dimensions Value (in mm)

X 0.60

C1

C2

Y

X C

G

X1

C2C2

G

Z

Y

X

Y

Y1

C1

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www.diodes.com

Y 1.55
C1 5.4
C2 1.27

Dimensions

C 0.650

G 0.450

X 0.450

X1 2.000

Y 1.350
Y1 1.700
Y2 5.300

Dimensions Value (in mm)

Z
G
X
Y

C1 2.40

C2

Value

(in mm)

3.20

1.60

0.55

0.80

0.95

AP2181/ AP2191

March 2013

© Diodes Incorporated

Suggested Pad Layout (cont.)

Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.

(4) Package Type: U-DFN2018-6

XC

Y1

Y

Dimensions Value (in mm)

C 0.50
G 0.20

X 0.25

X1 1.60

Y 0.35

G

X1

Y1 1.20

Taping Orientation

For U-DFN2018-6

AP2181/ AP2191

Notes: 9. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

16 of 17

www.diodes.com

March 2013

© Diodes Incorporated

AP2181/ AP2191

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 unauthorize d 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.

This document is written in English but may be translated into multiple languages for reference. Onl y the English version of this document is the
final and determinative format released by Diodes Incorporated.

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 © 2013, Diodes Incorporated

www.diodes.com

IMPORTANT NOTICE

LIFE SUPPORT

AP2181/ AP2191

Document number: DS31563 Rev. 7 - 2

17 of 17

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March 2013

© Diodes Incorporated