Datasheet AAT4626IHS-T1, AAT4626IHS-B1, AAT4626IHS-1-T1, AAT4626IHS-1-B1, AAT4626IAS-T1 Datasheet (Analogic Technologies)

AAT4626

USB Dual-Channel Power Switch

General Description

The AAT4626 SmartSwitch™ is part of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) product family. It is a dual­channel 500mA current-limited P-channel MOSFET
power switch designed for high-side load-switching
applications. This switch operates with inputs rang­ing from 2.7V to 5.5V, making it ideal for both 3V
and 5V systems. An integrated current-limiting cir­cuit protects the input supply against large changes
in load current which may cause the supply to fall
out of regulation. The AAT4626 is also protected
from thermal overload which limits power dissipa­tion and junction temperatures. The current limit
threshold is factory programmed at 1.0A, with a
maximum of 1.5A. The quiescent supply current is
typically a low 20µA. In shutdown mode, the supply
current decreases to less than 1µA.

The AAT4626 is available in 8 pin SOP or TSSOP
specified over a -40 to 85°C temperature range.

The AAT4600 Series is a family of adjustable and
fixed SmartSwitch™ products with a range of cur­rent handling capabilities. Single versions with
adjustable current limit (AAT4601) or fixed current
limit (AAT4625) as well as dual versions with fixed
current limit (AAT4626) are also available.

SmartSwitch

™

Features

• Compliant to USB 1.1 and 2.0 specifications

• 2.7V to 5.5V Input voltage range

• 500mA (min) continuous current per channel

• 1.25A (max) current limit per channel

• 90mΩ typical R

DS(ON)

• Low quiescent current

• Typically 20µA

• 1µA max with Switches off

• Thermal shutdown

• Slew rate limited turn on

• Fault flag with 2ms blanking

• Undervoltage Lockout

• Temp range -40 to 85°C

• UL Approved—File No. E217765

• 8 pin SOP or TSSOP package

Applications

• USB ports and peripherals

• Notebook computers

• Hot swap supplies

• General purpose power switching

Preliminary Information

UL Recognized Component

Typical Application

100kΩ

100kΩ

VCC 5.0V

ENA

(ENA)

ENB

0.1µF

GND GND

4626.2002.1.0.93 1

(ENB)

1

4

ENA

(ENA)

ENB

(ENB)

AAT4626

6

FLGA

FLGB

OUTA

OUTB

2

3

8

5

47µF

OUTPUTB

OUTPUTA

47µF

AAT4626

USB Dual-Channel Power Switch

Pin Descriptions

Pin # Symbol Function

1 / 4 EN(A/B) Enable Inputs: Logic-compatible enable input. High input > 2.1V typical. Low

(EN(A/B)) input < 1.9V typical. Active high or active low option available; see Ordering

Information for details.

2 / 3 FLG(A/B) Fault Flag Outputs: Active-low, open-drain output. Indicates over current,

UVLO and thermal shutdown.

6 GND Ground connection

7 IN Supply Input: This pin is the P-channel MOSFETs' source connections. Also

supplies the IC's internal circuitry.

8 / 5 OUT(A/B) Switch Outputs: These pins are the P-channel MOSFET drain connection.

Pin Configuration

ENA (ENA)

FLGA

FLGB

ENB (ENB)

SOP-8 TSSOP-8

(Top View) (Top View)

1 2

OUTA
IN
GND
OUTB

ENA (ENA)

FLGA
FLGB

ENB (ENB)

1 2

1

2

3

4

8

OUTA

7

IN

6

GND

5

OUTB

2 4626.2002.1.0.93

AAT4626

USB Dual-Channel Power Switch

Absolute Maximum Ratings (T

=25°C unless otherwise noted)

A

Symbol Description Value Units

V

IN

V

FLG

I

FLG

V

OUT

I

OUT

V

EN

T

S

T

LEAD

Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at con­ditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time.

IN to GND -0.3 to 6 V
FLGA, FLGB to GND -0.3 to 6 V
FLGA, FLGB Current 50 mA
OUTA, OUTB to GND -0.3 to VIN+0.3 V
Output Current Internally Limited
EN (EN) to GND -0.3 to 6 V
Storage Temperature 150 °C
Maximum Soldering Temperature (at Leads) 300 °C

Thermal Information

Symbol Description Value Units

Θ

JA

P

D

Note 1: Mounted on an FR4 printed circuit board with 1 oz. copper ground plane.

Electrical Characteristics (V

Maximum Thermal Resistance (SOP-8)
Maximum Power Dissipation (SOP-8)

= 5V, TA= -40 to 85°C unless otherwise noted. Typical values

IN

are at TA=25°C; bold values designate full temperature range)

1

1

100 °C/W

1.25 W

Symbol Description Conditions Min Typ Max Units

I

q

V

IN-THRSH

I

EN

C

EN

R

ds(ON)

T

ON

T

ON-RISE

T

OFF

T

OFF-FALL

I

SD(OFF)

I

LIMIT

OTMP Over Temperature Shut Down

R

FLG

I

SINK

V

UVLO

T

BLANK

Quiescent Current VIN=5V, ENA and ENB active 20 40 µA

Enable Input Threshold

Low-to-high transition 2.4 V

High-to-low transition 0.8 V
Enable Input Current VEN= 0V to 5.5V 0.01 1 µA
Enable Input Capacitance 1 pF

V

=5V, each switch, TA = 25°C 90 130 mΩ

On-Resistance

Output Turn-On Delay V

IN

V

=3.0V, each switch, TA = 25°C 100 150 mΩ

IN

=5V, RL = 10Ω 0.25 ms

IN

Output Turn-On Rise Time RL = 10Ω 0.2 ms
Output Turn-Off Delay V

=5V, RL = 10Ω 5 20 µs

IN

Output Turn-Off Fall Time RL = 10Ω 20 µs
Output Leakage Current EN=inactive, VIN=5.5V, V

=0V 0.03 1 µA

OUT

Current Limit Threshold ramped load applied to enable 0.75 1.0 1.50 A

output, V

T

increasing 125 °C

J

OUT

< 4.0V

TJdecreasing 115 °C
Error Flag Output Resistance V
Error Flag Off Current V

=5V, IL = 1mA 30 Ω

IN

= 5.5V 0.05 1 µA

FLG

Under voltage Lockout VIN=increasing, 1% hysterisis 2.0 2.3 2.7 V
Fault blanking 2 ms

4626.2002.1.0.93 3

Typical Characteristics

(°C)

put(V)

(Unless otherwise noted, VIN= 5V, TA= 25°C)

AAT4626

USB Dual-Channel Power Switch

Quiescent Current vs. Temperature

30

25

20

15

10

5

Quiescent Current (µA)

0

-40 -20 0 20 40 60 80 100 120

Temperature (°C)

Current Limit

1.4

1.2

1

0.8

0.6

Output (A)

0.4

0.2

0

012345

Out

Quiescent Current

25

20

15

10

Input (µA)

5

0

0123456

2 channels enabled

1 channel enabled

Input (V)

Off-Supply Current vs. Temperature

1.0000

0.1000

0.0100

Off-Switch Current (µA)

0.0010

-40 -20 0 20 40 60 80 100 120

Temperature (°C)

Off-Switch Current vs. Temperature

1.0000

(Both switches)

0.1000

0.0100

0.0010

0.0001

Off-Switch Current (µA)

0.0000

-40 -20 0 20 40 6 0 80 100 120

140.0

130.0

120.0

110.0

100.0

90.0

80.0

70.0

60.0

Rdson vs. Temperature

Vin=3V

Vin=5V

-40 -20 0 20 40 60 80 100 120

Temperature (°C)

Temperature

4 4626.2002.1.0.93

(Unless otherwise noted, VIN= 5V, TA= 25°C)

I

t

d

O

t

t

(V)

)

AAT4626

USB Dual-Channel Power Switch

Turn-ON/OFF Response with

10 Ohm 1µF load

EN (5V/div)

FAULT (5V/div)

Vout (2V/div)

Iin (200mA/div)

100µs/div

Thermal Shutdown Response

EN (5V/div)

FAULT (5V/div)

Vout (1V/div)

Iin (500mA/div)

100ms / div

Start Into 1 Ohm load

EN(5V/div

FAULT (5V/div)

Vout (1V/div)

Iin (500 mA/div)

200 µs/div

Short Circuit Through 0.3 Ohm

8

6

4

2

Input and Output (V)

0

-1012345

Input Voltage

Output Current

Output Voltage

Time (µs)

12

8

4

Output (A)

0

-4

Short Circuit Through 0.6 Ohm

6

pu
u

an

4

2

Input Voltage

Output Current

Output Voltage

npu

0

-1012345

Time (µs)

4626.2002.1.0.93 5

6

3

Output (A)

0

-3

Functional Block Diagram

AAT4626

USB Dual-Channel Power Switch

IN

Over-Temp

Protection

Under­Voltage
Lockout

EN A (EN A)

1.2V

Reference

Current

Limit

Functional Description

The AAT4626 is a dual integrated MOSFET load
switch with a fixed level current limit, over temper­ature protection, level shifted inputs and a fault flag
for each switch. The current limit control is com­bined with an over temperature thermal limit circuit
to provide a comprehensive system to protect the
load switch under short circuit or other adverse
operating conditions. The AAT4626 is ideally suit­ed for control and protection of peripheral ports
such as USB, RS232 and parallel ports.

The current limit and over temperature circuits will
act independently. The device current limit is acti­vated when the output load current exceeds a pre­set internal threshold level. The minimum current
limit threshold characteristic is specified by I
If the load switch ambient temperature becomes
excessive or if a short circuit condition persists, the
die temperature will rise causing the over tempera­ture protection circuit to activate.

If the current limit or over temperature protection
circuits are active for more then ten milliseconds,

LIM(MIN)

Over-Temp Protection

Under-Voltage Lockout

Current Limit

Over-Temp Protection

Under-Voltage Lockout

Current Limit

the system will be informed via the FAULT Flag.
The ten millisecond fault blanking delay allows the
AAT4626 to be turned on into large capacitive
loads without activating the FAULT Flags. The
open drain FAULT outputs can be connected
directly to system controllers driven by voltage lev­els less than the IN pin voltage without additional
level shifting circuitry.

Each of the two load switches is turned on and off
by applying a logic level signal to the EN(A/B) pin.
The AAT4626 enable function is available in both
active high and active low logic level versions. The
AAT4626 typically consumes 20µA when operat­ing, when off, the device draws less then 1µA. In
the off state, current is prevented from flowing
between the input and output on each respective

.

channel. The EN(A/B) function has logic level
thresholds that allow the AAT4626 to be TTL com­patible and may also be controlled by 2.5V to 5.0V
CMOS circuits. The voltage level on either
EN(A/B) or FAULT(A/B) should not exceed the
input supply level present on the IN pin.

OUT A

OUT B

EN B (EN B)

FLG A

FLG B

6 4626.2002.1.0.93

AAT4626

USB Dual-Channel Power Switch

Applications Information

Operation in Current Limit

If an excessive load is applied to the either output
of an AAT4626, the load current will be limited by
the AAT4626's current limit circuitry. Refer to the
"Current Limit" figure in the typical characteristics
section of this data sheet. If a short circuit were to
occur on the load applied to either the A or B out­put, there would be a demand for more current
than what is allowed by the internal current limiting
circuit and the voltage at the device output will
drop. This causes the AAT4626 to dissipate more
power than in normal operation, causing the die
temperature to increase. When die temperature
exceeds the internal over temperature threshold,
the AAT4626 will shut down both the A and B out­put channels. After shutting down, the AAT4626
cools to a level below the over temperature thresh­old, at which point it will start up again. The
AAT4626 will continue to cycle off and on until one
of the following events occurs; the load current of
the offending output is reduced to a level below the
AAT4626's current limit setting, the input power is
removed, or until the output is turned off by a logic
high level applied to the EN pin of the fault channel.

Thermal Considerations

Since the AAT4626 has internal current limit and
over temperature protection, junction temperature
is rarely a concern. If an application requires a
large load current in a high temperature operating
environment, there is the possibility that the over
temperature protection circuit rather than the cur­rent limit circuit from one of the two outputs will reg­ulate the current available to the load. In these
applications, the maximum current available with­out risk of activation of the over temperature circuit
can be calculated. The maximum internal temper­ature while current limit is not active can be calcu­lated using Equation 1.

T

J(MAX)

In Equation 1, I
required by the load. R
mum rated R
ature. R
device die and the board onto which it is mounted.
TA(MAX) is the maximum ambient temperature for

2

= I

× R

MAX

DS(ON)

is the thermal resistance between the

θJA

(MAX) × R

DS(ON)

is the maximum current

MAX

(MAX) is the maxi-

DS(ON)

+ TA(MAX)

θJA

of the AAT4626 at high temper-

the printed circuit board assembly under the
AAT4626 when the load switch is not dissipating
power. Equation 1 can be transformed to provide

; Refer to Equation 2.

I

MAX

(MIN) - TA(MAX)

T

I

MAX

SD

=

R

DS(ON)

(MAX) × R

θJA

TSD(MIN) is the minimum temperature required to
activate the device over temperature protection.
The typical thermal limit temperature specification
is 125°C for the AAT4626, for calculations, 115°C is
a safe minimum value to use.

For example, a portable device is specified to oper­ate in a 50°C environment. The printed circuit board
assembly will operate at temperatures as high as
85°C. This portable device has a sealed case and
the area of the printed board assembly is relatively
small causing R
R

(MAX) = 130W. Using Equation 2,

DS(ON)

I

=

MAX

to be approximately 100°C/W.

θJA

115°C - 85°C

130W × 120°C/W

= 1.4 A

If this system requires less than 1.4 A, the thermal
limit will not activate during normal operation.

Input Capacitor

The input capacitor serves two purposes. First, it
protects the source power supply from transient
current effects generated by the application load cir­cuits. If a short circuit is suddenly applied to either
output of an AAT4626, there is a microsecond long
period during which a large current can flow before
the current limit circuit becomes active. Refer to the
characteristic curve named "Short Circuit Through

0.3Ω." A properly sized input capacitor can dramat­ically reduce the load switch input transient
response effects seen by the power supply and
other circuitry upstream from the AAT4626.

The second purpose of the input capacitor is to pre­vent transient events generated by the load circuits
from effecting the operation of the AAT4626. For
example, if an AAT4626 is used in a circuit that oper­ates from a 5 volt power supply with poor step load
response, it is possible that turning on the load
switch could cause the input power supply to droop
below the AAT4626's under voltage lockout thresh­old. This drop in voltage would cause the AAT4626
to turn off until the input power supply voltage levels

4626.2002.1.0.93 7

AAT4626

USB Dual-Channel Power Switch

recovers. Since this cycle would be self-perpetuat­ing, the entire circuit could be seen to be unstable. In
the very rare case where capacitor cost is prohibitive
and the input capacitor is omitted, the output load cir­cuit should be slew rate limited when turned on.

Output Capacitor

In order to insure stability while the device current
limit is active, a small capacitance of approximately
1µF should be used on each output. When either
output of the AAT4626 is activated using the
EN(A/B) function, there are no momentary current
transients as in the case of when a short circuit sud­denly applied to a device that is already on. Refer to
the characteristic curve named "Turn-On/OFF
Response". Regardless of output capacitor size,
output current on either output is limited to the value
allowed by the threshold determined by the internal
current limiting circuitry. Refer to the internal current
limit threshold specifications stated in the electrical
characteristics section of this datasheet. This per­mits very large output capacitors to be used.

For example, USB ports are specified to have at
least 120µF of down stream capacitance from their
controlling power switch. An output capacitance as
large as 1000µF would not disturb the input power
supply to an AAT4626 used to control a USB port.

Fault Flag Output

The AAT4626 features an active low fault flag
(FLGA and FLGB) output for each A and B output
channel. The fault flags are provided to alert the
system if the over current or over temperature cir­cuits become active or if the load switch is not
receiving a sufficient voltage level to operate prop­erly. If either the current limit or over temperature
circuits in any combination are constantly active for
more than approximately ten milliseconds, the
FLG(A/B) pin is pulled to ground internally through
an open drain device. The 10 millisecond delay on
the fault function is intended to prevent capacitive
loads connected to one of the load switch outputs
from activating it's respective flag when the device
is turned on. The placement of a pull up resistor
between the FLGA or FLGB pin and the IN pin is
recommended. Reasonable values for the pull up
resistor should range from 10kΩ to 100kΩ. Since
the fault flags are open drain terminals, they may be
pulled up to any voltage that is not greater than the
level present on the IN pin. This is done to allow the
AAT4625 to signal ancillary circuitry that is powered
by voltage levels less than the level on the IN pin.

If a fault flag delay greater then 10ms is required,
addition delay may be added by use of an RC filter.
Referencing to Figure 1, an RC filter can be added
to the fault flag output.

EN Inputs

The AAT4626 has two enable inputs, ENA and
ENB. These two enable inputs allow the AAT4626
to independently control each respective output.
The device is available in both active high EN
enable and active low (EN) enable versions. For
specific part numbers, refer to the ordering infor­mation section. When both the A and B outputs of
the AAT4626 are in the off state, the respective out­puts are an open circuit and the device quiescent
current consumption is reduced to less than 1µA.
The ENA and ENB threshold voltages are set to
allow the AAT4626 to be controlled by 5 volt TTL
levels as well as CMOS compatible levels ranging
from 2.5 volts to 5 volts. The ENA or ENB function
control voltage levels should not exceed the input
supply level applied to the IN pin.

8 4626.2002.1.0.93

Reverse Voltage

The AAT4626 is designed to control current flowing
from IN to OUT. If a voltage is applied to OUT
which is greater than that on IN, a large resulting
reverse current may flow, potentially damaging the
AAT4626.

Under Voltage Lockout

The AAT4626 has been designed with an under
voltage lockout (UVLO) control circuit. The under
voltage lockout prevents the output MOSFET
devices from turning on until VIN exceeds the typi­cal UVLO threshold of 2.3 volts. During operation,
the device will automatically shutdown if VIN falls
below the UVLO threshold and the fault flags will
be toggled.

USB Controller

Over Current

Flag Input

Figure 1: Fault Flag delay RC filter.

Hot-Plug Applications

Application circuit cards with a high in-rush current
potential can be limited by use of the AAT4626.
The AAT4626 has both slew rate limited turn on
characteristics and current limit controlled outputs,
which make it ideally suited for power port hot-plug
applications. A host power back plane or hot plug
receptacle may be sensitive to short duration high

AAT4626

USB Dual-Channel Power Switch

V+

100k

AAT4626

R1

10k

C1

0.1µF

1

ENA

2

FLGA

3

FLGB

45

ENB OUTB

power surges. The AAT4626 will turn on in a linear
ramping fashion and regulate the inrush current
with in the specified current limit for the device.
The error flag usually will not be effected during
application turn on since the 10ms fault flag blank­ing time is intended for these types of events. If an
application turn on current surge exceeds 10ms, an
RC delay filter may be added to the Flag output to
prevent the system from receiving an error during
the start up sequence.

OUTA

GND

8

7

IN

6

Cable / Connector

V

BUS

Hot-Plug

Receptacle

GND

to Hot-Plug Port

V+

C

IN

4.7µF

GND

Inrush Current Protected

AAT4626

1

ENA

2

FLGA

3

FLGB

45

ENB OUTB

Dual Channel

Application Card

OUTA

GND

8

7

IN

6

0.1µF

C

BULKA

(120µF)

Application

Circuit A

C

BULKB

(120µF)

Figure 2: AAT4626 Input Inrush Current Protected Dual Output Application

Card

Card

Application

Circuit B

4626.2002.1.0.93 9

AAT4626

USB Dual-Channel Power Switch

PCB Layout Information

In order to obtain the maximum performance from
the AAT4626, very careful attention must be con­sidered in regard to the printed circuit board layout.
In most port power switch and port protection appli­cations, high voltage and current transient events
will occur. Proper printed circuit board (PCB) lay­out can help reduce the effects of transient events.
PCB trace resistance will effect over all circuit tran­sient response, in addition small voltage drops will
be incurred.

Refer to the following guidelines for power port
PCB layout:

1. PCB traces should be kept as short and direct
as possible to minimize the effects of the PCB
on circuit performance.

Power Supply

4.50V to 5.25V

Input

V+

GND

Trace Resistance

0.01ohms
(5mV)

C

BULK

(5mV)

P-Channel Mosfet

Switch On Resistance

0.1µF C

AAT4626

0.09ohms
(45mV)

Ch. A

GND

2. Make component solder pads large to mini­mize contact resistance

3. The AAT4626 output bulk capacitors and fer­rite beads should be placed as close to the
device as possible. PCB traces to the output
connector should be kept as short as possible
to minimized trace resistance and the associ­ated voltage drop (I2R loss).

4. If ferrite beads are used in the circuit, select
ferrite beads with a minimum series resistance.

5. The use of PCB trace vias should be avoided
on all traces that conduct high currents. If
vias are necessary, make the vias as large as
possible and use multiple vias connected in
parallel to minimize their effect.

Ferrite Bead

and PCB trace

resistance

0.02ohms

OUTAIN

(10mV)

BULK

(10mV)

Cable, Connector

and Contact

Resistance

0.03ohms
(15mV)

0.1µF

(15mV)

V

BUS

GND

Downstream

Peripheral Port

500mA Max.

Load Current

Total Voltage Drop = 75mV

Figure 3: Summary of typical circuit voltage drops caused by AAT4626 circuit components and PCB
trace resistance.

Evaluation Board Layout

The AAT4626 evaluation layout follows the recom­mend printed circuit board layout procedures and

layouts. Note that ferrite beards are not used on
this simple device evaluation board. The board
layout shown is not to scale.

can be used as an example for good application

10 4626.2002.1.0.93

AAT4626

USB Dual-Channel Power Switch

Figure 4: Evaluation board Figure 5: Evaluation board Figure 6: Evaluation board
component side layout solder side layout top side silk screen layout /

assembly drawing

Application Circuits

R2
100k

IN OUTA

AAT4626

1

ENA

2

FLGA

3

FLGB

4

ENB

OUTB

6

V

= 5.0V

BUS

C

IN

0.1µF

R1

100k

USB Controller

On/Off A

Error Flag A

Error Flag B

On/Off B

Figure 7: Typical Dual USB Host Port Application

87

C

OUT1

0.1µF

Ferrite Bead s

C

OUT2

120µF

V

BUS(A)

D+

D-

GND

DATA

(Port A)

5

C

OUT3

0.1µF

Ferrite Bead s

C

OUT4

120µF

V

BUS(B)

D+

D-

GND

DATA

(Port B)

4626.2002.1.0.93 11

4.50V to 5.25V
Upstream V

100mA Maximum

V

BUS

D+

D-

GND

BUS

AAT3200-3.3

IN OUT

GND

USB Dual-Channel Power Switch

100k

100k

3.3V USB Controller AAT4626

VIN ON/OFF A

1µF1µF

Over Current A

Over Current B

ON/OFF B

GND

ENA OUTA

FLGA

FLGB

ENB OUTB

GND

AAT4626

V

CC

+5.0V

0.1µF

Ferrite Beads

IN

120µF

0.1µF

USB Port A

V

BUS(A)

D+

D-

GND

Data

Figure 8: Self-Powered Dual Port USB Hub

4.50V to 5.25V

Upstream V

100mA Maximum

V

BUS

D+

D-

GND

BUS

Data

AAT3200-3.3

IN OUT

GND

3.3V USB Controller AAT4626

VIN ON/OFF A

1µF1µF

100k

100k

Over Current A

Over Current B

ON/OFF B

GND

ENA OUTA

FLGA

FLGB

GND

ENB OUTB

Ferrite Beads

120µF

0.1µF

USB Port B

V

BUS(B)

D+

D-

GND

Data A/B

(Two Pair to

USB Controller)

0.1µF

Ferrite Beads

IN

120µF

0.1µF

USB Port A

V

BUS(A)

D+

D-

GND

Data A

Ferrite Beads

120µF 0.1µF

USB Port B

V

BUS(B)

D+

D-

GND

Data B

Figure 9: USB Bus Powered Dual Port USB Hub

12 4626.2002.1.0.93

Ordering Information

AAT4626

USB Dual-Channel Power Switch

Package Enable Marking

Part Number

Bulk Tape and Reel

SOP8 EN (Active-high) AAT4626IAS-1-B1 AAT4626IAS-1-T1

SOP8 EN (Active-low) AAT4626IAS-B1 AAT4626IAS-T1

TSSOP8 EN (Active-high) AAT4626IHS-1-B1 AAT4626IHS-1-T1

TSSOP8 EN (Active-low) AAT4626IHS-B1 AAT4626IHS-T1

Package Information

SOP-8

Millimeters Inches

Min Max Min Max

7(4x)

y

1 2

b

Dim

A 1.35 1.75 0.053 0.069

E

H

A1 0.10 0.25 0.004 0.010
A2 1.45 0.057

B 0.33 0.51 0.013 0.020
C 0.19 0.25 0.007 0.010
D 4.80 5.00 0.189 0.197

D

E 3.80 4.00 0.150 0.157
e 1.27 0.050
H 5.80 6.20 0.228 0.244
L 0.40 1.27 0.016 0.050
Y 0.00 0.10 0.000 0.004

A

A2

A1

e

Q

L

c

θ10° 8° 0° 8°

Note:

1. PACKAGE BODY SIZES EXCLUDE MOLD FLASH
PROTRUSIONS OR GATE BURRS.

2. TOLERANCE 0.1000mm (4mil) UNLESS
OTHERWISE SPECIFIED

3. COPLANARITY: 0.1000mm

4. DIMENSION L IS MEASURED IN GAGE PLANE.

5. CONTROLLING DIMENSION IS MILLIMETER;
CONVERTED INCH DIMENSIONS ARE NOT
NECESSARILY EXACT.

4626.2002.1.0.93 13

TSSOP-8

AAT4626

USB Dual-Channel Power Switch

1 2

b

Dim

Millimeters Inches

Min Max Min Max

A 1.05 1.20 0.041 0.047
A1 0.05 0.15 0.002 0.006
A2 - 1.05 - 0.041

b 0.25 0.30 0.010 0.012

E

E1

DETAIL A

c 0.127 0.005

D-8 2.90 3.10 0.114 0.122

D-28 9.60 9.80 0.378 0.386

E 4.30 4.50 0.170 0.177
E1 6.20 6.60 0.244 0.260

e 0.65 BSC 0.025 BSC

L 0.50 0.70 0.20 0.028
L1 1.0 0.039

R 0.09 - 0.004 -

D

e

A1

E

AA2

DETAIL A

0.20

R1

R

1

L

2

L1

R1 0.09 - 0.004 -

θ10° 8° 0° 8°
θ2 12°

Advanced Analogic Technologies, Inc.

1250 Oakmead Parkway, Suite 310, Sunnyvale, CA 94086
Phone [phone]
Fax [phone]

14 4626.2002.1.0.93