AAT4626IAS-1-T1 - AnalogicTech

SmartSwitch™

General Description

The AAT4626 SmartSwitch™ is part of

AnalogicTech's Application Specific Power

MOSFET™ (ASPM™) product family. It is a dual-

channel 500mA current-limited P-channel MOSFET

power switch designed for high-side load-switching

applications. This switch operates with inputs rang-

ing from 2.7V to 5.5V, making it ideal for both 3V

and 5V systems. An integrated current-limiting cir-

cuit 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 dissipa-

tion 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 cur-

rent 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.

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 RDS(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

UL Recognized Component

AAT4626

USB Dual-Channel Power Switch

Typical Application

AAT4626

VCC 5.0V

GND GND

47µF

FLGA

FLGB

OUTA

OUTB

(ENB)

ENB

(ENB)

ENB

(ENA)

ENA

(ENA)

ENA

OUTPUTB

OUTPUTA

0.1µF

100kΩ

Preliminary Information

4626.2002.1.0.93 1

Pin Descriptions

Pin Configuration

SOP-8 TSSOP-8

(Top View) (Top View)

1 2

OUTA

GND

OUTB

ENA (ENA)

FLGA

FLGB

ENB (ENB)

1 2

ENA (ENA)

ENB (ENB)

FLGA

FLGB

OUTA

GND

OUTB

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.

AAT4626

USB Dual-Channel Power Switch

24626.2002.1.0.93

Absolute Maximum Ratings (TA=25°C unless otherwise noted)

Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at con-

ditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time.

Thermal Information

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

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

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

Symbol Description Conditions Min Typ Max Units

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

VIN-THRSH Enable Input Threshold Low-to-high transition 2.4 V

High-to-low transition 0.8 V

IEN Enable Input Current VEN = 0V to 5.5V 0.01 1µA

CEN Enable Input Capacitance 1 pF

Rds(ON) On-Resistance VIN =5V, each switch, TA = 25°C 90 130 mΩ

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

TON Output Turn-On Delay VIN =5V, RL = 10Ω 0.25 ms

TON-RISE Output Turn-On Rise Time RL = 10Ω 0.2 ms

TOFF Output Turn-Off Delay VIN =5V, RL = 10Ω 5 20 µs

TOFF-FALL Output Turn-Off Fall Time RL = 10Ω 20 µs

ISD(OFF) Output Leakage Current EN=inactive, VIN=5.5V, VOUT=0V 0.03 1µA

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

output, VOUT < 4.0V

OTMP Over Temperature Shut Down TJincreasing 125 °C

TJdecreasing 115 °C

RFLG Error Flag Output Resistance VIN =5V, IL = 1mA 30 Ω

ISINK Error Flag Off Current VFLG = 5.5V 0.05 1µA

VUVLO Under voltage Lockout VIN =increasing, 1% hysterisis 2.0 2.3 2.7 V

TBLANK Fault blanking 2 ms

Symbol Description Value Units

ΘJA Maximum Thermal Resistance (SOP-8)1100 °C/W

PDMaximum Power Dissipation (SOP-8)11.25 W

Symbol Description Value Units

VIN IN to GND -0.3 to 6 V

VFLG FLGA, FLGB to GND -0.3 to 6 V

IFLG FLGA, FLGB Current 50 mA

VOUT OUTA, OUTB to GND -0.3 to VIN+0.3 V

IOUT Output Current Internally Limited

VEN EN (EN) to GND -0.3 to 6 V

TSStorage Temperature 150 °C

TLEAD Maximum Soldering Temperature (at Leads) 300 °C

AAT4626

USB Dual-Channel Power Switch

4626.2002.1.0.93 3

Typical Characteristics

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

Rdson vs. Temperature

60.0

70.0

80.0

90.0

100.0

110.0

120.0

130.0

140.0

-40 -20 0 20 40 60 80 100 120

Temperature (°C)

Vin=3V

Vin=5V

Off-Switch Current vs. Temperature

0.0000

0.0001

0.0010

0.0100

0.1000

1.0000

-40 -20 0 20 40 60 80 100 120

Tem

erature

(

°C

)

(Both switches)

Off-Switch Current (µA)

Off-Supply Current vs. Temperature

0.0010

0.0100

0.1000

1.0000

-40 -20 0 20 40 60 80 100 120

Temperature (°C)

Off-Switch Current (µA)

Current Limit

0.2

0.4

0.6

0.8

1.2

1.4

012345

Out

Output (A)

(

)

Quiescent Current

0123456

Input (V)

2 channels enabled

1 channel enabled

Input (µA)

Quiescent Current vs. Temperature

-40 -20 0 20 40 60 80 100 120

Temperature (°C)

Quiescent Current (µA)

AAT4626

USB Dual-Channel Power Switch

44626.2002.1.0.93

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

Short Circuit Through 0.6 Ohm

-1012345

-3

Input Voltage

Output Voltage

Output Current

npu

(V)

Output (A)

Time (µs)

Short Circuit Through 0.3 Ohm

-1012345

Input and Output (V)

Output (A)

-4

Input Voltage

Output Voltage

Output Current

Time (µs)

Thermal Shutdown Response

100ms / div

EN (5V/div)

FAULT (5V/div)

Vout (1V/div)

Iin (500mA/div)

Start Into 1 Ohm load

(

5V/div

)

FAULT (5V/div) Vout (1V/div)

Iin (500 mA/div)

200 µs/div

EN (5V/div)

FAULT (5V/div)

Vout (2V/div)

Iin (200mA/div)

Turn-ON/OFF Response with

10 Ohm 1µF load

100µs/div

AAT4626

USB Dual-Channel Power Switch

4626.2002.1.0.93 5

AAT4626

USB Dual-Channel Power Switch

64626.2002.1.0.93

Functional Block Diagram

Over-Temp

Protection

Under-

Voltage

Lockout

Under-Voltage Lockout

Over-Temp Protection

Current Limit

Under-Voltage Lockout

Over-Temp Protection

Current Limit

Current

Limit

1.2V

Reference

EN A (EN A)

IN OUT A

OUT B

EN B (EN B)

FLG A

FLG B

Functional Description

The AAT4626 is a dual integrated MOSFET load

switch with a fixed level current limit, over temper-

ature protection, level shifted inputs and a fault flag

for each switch. The current limit control is com-

bined 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 suit-

ed 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 acti-

vated when the output load current exceeds a pre-

set internal threshold level. The minimum current

limit threshold characteristic is specified by ILIM(MIN).

If the load switch ambient temperature becomes

excessive or if a short circuit condition persists, the

die temperature will rise causing the over tempera-

ture protection circuit to activate.

If the current limit or over temperature protection

circuits are active for more then ten milliseconds,

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 lev-

els 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 operat-

ing, 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 com-

patible 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.

AAT4626

USB Dual-Channel Power Switch

4626.2002.1.0.93 7

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 out-

put, 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 out-

put channels. After shutting down, the AAT4626

cools to a level below the over temperature thresh-

old, 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 cur-

rent limit circuit from one of the two outputs will reg-

ulate the current available to the load. In these

applications, the maximum current available with-

out risk of activation of the over temperature circuit

can be calculated. The maximum internal temper-

ature while current limit is not active can be calcu-

lated using Equation 1.

TJ(MAX) = IMAX2× RDS(ON)(MAX) × RθJA + TA(MAX)

In Equation 1, IMAX is the maximum current

required by the load. RDS(ON)(MAX) is the maxi-

mum rated RDS(ON) of the AAT4626 at high temper-

ature. RθJA is the thermal resistance between the

device die and the board onto which it is mounted.

TA(MAX) is the maximum ambient temperature for

the printed circuit board assembly under the

AAT4626 when the load switch is not dissipating

power. Equation 1 can be transformed to provide

IMAX; Refer to Equation 2.

IMAX=TSD(MIN) - TA(MAX)

RDS(ON)(MAX) × RθJA

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 oper-

ate 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 RθJA to be approximately 100°C/W.

RDS(ON)(MAX) = 130W. Using Equation 2,

IMAX=115°C - 85°C = 1.4 A

130W × 120°C/W

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 cir-

cuits. 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 dramat-

ically 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 pre-

vent 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 oper-

ates 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 thresh-

old. This drop in voltage would cause the AAT4626

to turn off until the input power supply voltage levels

recovers. Since this cycle would be self-perpetuat-

ing, 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 cir-

cuit 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 sud-

denly 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 per-

mits 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.

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 infor-

mation section. When both the A and B outputs of

the AAT4626 are in the off state, the respective out-

puts 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.

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 cir-

cuits become active or if the load switch is not

receiving a sufficient voltage level to operate prop-

erly. 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.

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 typi-

cal 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.

AAT4626

USB Dual-Channel Power Switch

84626.2002.1.0.93

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

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 blank-

ing 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.

AAT4626

USB Dual-Channel Power Switch

4626.2002.1.0.93 9

Figure 1: Fault Flag delay RC filter.

10k

100k

0.1µF

AAT4626

ENA

FLGA

FLGB

ENB OUTB

GND

OUTA

V+

USB Controller

Over Current

Flag Input

Figure 2: AAT4626 Input Inrush Current Protected Dual Output Application

CIN

4.7µF

AAT4626

ENA

FLGA

FLGB

ENB OUTB

GND

OUTA

CBULKA

(120µF)

Card

Application

Circuit A

V+

GND Dual Channel

Inrush Current Protected

Application Card

Cable / Connector

to Hot-Plug Port

BUS

GND

Hot-Plug

Receptacle Card

Application

Circuit B

CBULKB

(120µF)

0.1µF

PCB Layout Information

In order to obtain the maximum performance from

the AAT4626, very careful attention must be con-

sidered in regard to the printed circuit board layout.

In most port power switch and port protection appli-

cations, high voltage and current transient events

will occur. Proper printed circuit board (PCB) lay-

out can help reduce the effects of transient events.

PCB trace resistance will effect over all circuit tran-

sient 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.

2. Make component solder pads large to mini-

mize contact resistance

3. The AAT4626 output bulk capacitors and fer-

rite 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 associ-

ated 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.

AAT4626

USB Dual-Channel Power Switch

10 4626.2002.1.0.93

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

trace resistance.

Trace Resistance

0.01ohms

(5mV)

CBULK 0.1µF CBULK 0.1µF

Cable, Connector

and Contact

Resistance

0.03ohms

(15mV)

V+

GND

Input

Power Supply

4.50V to 5.25V

P-Channel Mosfet

Switch On Resistance

0.09ohms

(45mV)

AAT4626

Ch. A

Ferrite Bead

and PCB trace

resistance

0.02ohms

(10mV)

BUS

GND

Downstream

Peripheral Port

500mA Max.

Load Current

Total Voltage Drop = 75mV

OUTAIN

GND

Evaluation Board Layout

The AAT4626 evaluation layout follows the recom-

mend printed circuit board layout procedures and

can be used as an example for good application

layouts. Note that ferrite beards are not used on

this simple device evaluation board. The board

layout shown is not to scale.

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

Figure 7: Typical Dual USB Host Port Application

CIN

0.1µF

100k

On/Off A

Error Flag A

USB Controller

AAT4626

VBUS = 5.0V IN OUTA

FLGA

ENA

OUTB

COUT1

0.1µF

COUT2

120µF

DATA

(Port A)

D+

D-

VBUS(A)

GND

Ferrite Beads

COUT3

0.1µF

COUT4

120µF

DATA

(Port B)

D+

D-

VBUS(B)

GND

Ferrite Beads

Error Flag B

On/Off B

FLGB

ENB

100k

AAT4626

USB Dual-Channel Power Switch

4626.2002.1.0.93 11

AAT4626

USB Dual-Channel Power Switch

12 4626.2002.1.0.93

Figure 8: Self-Powered Dual Port USB Hub

Figure 9: USB Bus Powered Dual Port USB Hub

120

0.1

100k

AAT3200-3.3 3.3V USB Controller AAT4626 Ferrite Beads

Data

Data A

BUS

D+

D-

GND

BUS(A)

D+

D-

GND

USB Port A

4.50V to 5.25V

Upstream V

BUS

100mA Maximum

VIN ON/OFF A

Over Current A

IN OUT

GND

ENA OUTA

FLGA

FLGB

ENB OUTB

GND

100k

Over Current B

ON/OFF B

120

F0.1

Ferrite Beads

Data B

BUS(B)

D+

D-

GND

USB Port B

120µF

0.1µF

100k

1µF1µF

AAT3200-3.3 3.3V USB Controller AAT4626 Ferrite Beads

Data

Data A/B

(Two Pair to

USB Controller)

BUS

D+

D-

GND

BUS(A)

D+

D-

GND

USB Port A

4.50V to 5.25V

Upstream V

BUS

100mA Maximum

VIN ON/OFF A

Over Current A

IN OUT

GND

ENA OUTA

FLGA

FLGB

ENB OUTB

GND

100k

Over Current B

ON/OFF B

120µF

0.1µF

Ferrite Beads

BUS(B)

D+

D-

GND

USB Port B

+5.0V

AAT4626

USB Dual-Channel Power Switch

4626.2002.1.0.93 13

Ordering Information

Package Information

SOP-8

1 2

7(4x)

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

Dim Millimeters Inches

Min Max Min Max

A 1.35 1.75 0.053 0.069

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

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

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.

TSSOP-8

1 2

AA2

E1 DETAIL A

0.20

DETAIL A

AAT4626

USB Dual-Channel Power Switch

14 4626.2002.1.0.93

Advanced Analogic Technologies, Inc.

1250 Oakmead Parkway, Suite 310, Sunnyvale, CA 94086

Phone (408) 524-9684

Fax (408) 524-9689

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

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 -

R1 0.09 - 0.004 -

θ10° 8° 0° 8°

θ2 12°