AAT3681IJS-4.2-T1 - AnalogicTech

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 1

BatteryManager™

General Description

The AAT3681 BatteryManager is a member of

AnalogicTech's Total Power Management IC™

(TPMIC™) product family. This product is an inte-

grated single cell lithium-ion/polymer battery charg-

er IC, designed to operate from a DC power source

or USB port up to an input voltage of 6.5V. It requires

just one external component.

The AAT3681 precisely regulates battery charge

voltage and current for 4.2V (4.375V option) lithium-

ion/polymer battery cells. When charged from an

AC adapter or USB port, the battery charging cur-

rent can be set by an external resistor up to 300mA.

Battery charge state is continuously monitored for

fault conditions. In the event of an over-voltage,

short-circuit, or over-temperature failure, the

device will automatically shut down, thus protecting

the charging device, control system, and the bat-

tery under charge. A status monitor output pin is

provided to indicate the battery charge status by

directly driving an external LED.

The AAT3681 is available in a Pb-free, thermally

enhanced, space-saving 8-pin 2.0x2.1mm SC70JW

package and is specified for operation over the

-40°C to +85°C temperature range.

Features

• USB or AC Adapter System Power Charger

— Programmable from 15mA to 300mA

• 4.0V ~ 6.5V Input Voltage Range

• High Level of Integration with Internal:

— Charging Device

— Reverse Blocking Diode

• Automatic Current Sensing

• Automatic Recharge Sequencing

• Full Battery Charge Auto Turn Off/Sleep

Mode/Charge Termination

• Shutdown Current <1µA

• Automatic Trickle Charge for Battery Pre-

Conditioning

• Over-Voltage and Emergency Thermal

Protection

• Power On Reset and Soft Start

• LED Status Pin

• 8-Pin 2.0x2.1mm SC70JW Package

Applications

• Bluetooth™ Headsets

• DECT Headsets

• Digital Still Cameras

• MP3, Portable Music, and Portable Media

Players

• Personal Data Assistants (PDAs)

• Wrist Watches

• Other Lithium-Ion/Polymer Battery-Powered

Devices

Typical Application

AAT3681

BATT-

Battery

Pack

ADP

GND

BAT

BATT+

SET

dapter/USB Input

STAT

ISET

Enable

Pin Description

Pin Configuration

SC70JW-8

(Top View)

ISET

BAT

ADP

GND

STA

Pin # Symbol Type Function

1 EN In Enable pin. Logic high enables the IC (internally pulled down).

2 ISET In/Out Connect resistor here to set the charge current.

3 BAT In/Out Battery charging and sensing.

4 ADP Power In Input from USB/adapter charger.

5 STAT Out Open drain status pin.

6, 7, 8 GND Power Ground connection.

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

23681.2006.05.1.1

Absolute Maximum Ratings1

Thermal Information2

Symbol Description Value Units

PDMaximum Power Dissipation 0.687 W

θJA Maximum Thermal Resistance 160 °C/W

Symbol Description Value Units

VPADP Continuous -0.3 to 7.5 V

VNBAT, STAT, ISET, EN -0.3 to VP+ 0.3 V

TJOperating Junction Temperature Range -40 to 150 °C

TLEAD Maximum Soldering Temperature (at Leads) 300 °C

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 3

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

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

2. Mounted on an FR4 board.

Electrical Characteristics1

VADP = 5V, TA= -25°C to +85°C, unless otherwise noted. Typical values are TA= 25°C.

Symbol Description Conditions Min Typ Max Units

Operation

VADP Adapter Voltage Range 4.0 6.5 V

VUVLO

Under-Voltage Lockout (UVLO) Rising Edge 3 4 V

UVLO Hysteresis 150 mV

IOP Operating Current Charge Current = 200mA 0.5 1 mA

ISHUTDOWN Shutdown Current VBAT = 4.25V, EN = GND 0.3 1 µA

ILEAKAGE Reverse Leakage Current from BAT Pin VBAT = 4V, ADP Pin Open 0.4 2 µA

Voltage Regulation

VBAT_EOC End of Charge Accuracy 4.158 4.20 4.242 V

ΔVCH/VCH Output Charge Voltage Tolerance 0.5 %

VMIN Preconditioning Voltage Threshold 2.85 3.0 3.15 V

VRCH Battery Recharge Voltage Threshold Measured from VBAT_EOC -0.1 V

Current Regulation

ICH Charge Current Programmable Range 15 300 mA

ΔICH/ICH Charge Current Regulation Tolerance 10 %

VSET ISET Pin Voltage 2 V

KI_ACurrent Set Factor: ICH/ISET 800

Charging Devices

RDS(ON) Charging Transistor On Resistance VADP = 5.5V 0.9 1.1 Ω

Logic Control/Protection

VEN(H) Input High Threshold 1.6 V

VEN(L) Input Low Threshold 0.4 V

VSTAT Output Low Voltage STAT Pin Sinks 4mA 0.4 V

ISTAT STAT Pin Current Sink Capability 8 mA

VOVP Over-Voltage Protection Threshold 4.4 V

ITK/ICHG Pre-Charge Current ICH = 100mA 10 %

ITERM/ICHG Charge Termination Threshold Current 10 %

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

43681.2006.05.1.1

1. The AAT3681 output charge voltage is specified over the 0° to 70°C ambient temperature range; operation over the -25°C to +85°C

temperature range is guaranteed by design.

Typical Characteristics

Constant Charging Current vs. Temperature

SET

= 8.06kΩ

)

Temperature (

(mA)

190

193

195

198

200

203

205

208

210

-50 -25 0 25 50 75 100

Constant Charging Current vs.

Supply Voltage

SET

= 8.06kΩ

)

(V)

(mA)

170

180

190

200

210

220

4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25

6.5

BAT

= 3.6V

BAT

= 4V

BAT

= 3.3V

End of Charge Voltage Regulation

vs. Temperature

SET

= 8.06kΩ

)

Temperature (

BAT_EOC

(V)

4.17

4.18

4.19

4.20

4.21

4.22

4.23

-50 -25 0 25 50 75 100

End of Charge Battery Voltage

vs. Supply Voltage

(V)

BAT_EOC

(V)

4.194

4.196

4.198

4.200

4.202

4.204

4.206

4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5

SET

= 8.06kΩ

SET

= 31.6kΩ

Charging Current vs. Battery Voltage

BAT

(V)

(mA)

100

150

200

250

300

350

2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3

SET

= 8.06kΩ

SET

= 5.36kΩ

SET

= 16.2kΩ

SET

= 31.6kΩ

SET

(kΩ

)

(mA)

100

1000

1 10 100 1000

Constant Charging Current

vs. Set Resistor Values

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 5

Typical Characteristics

Recharging Threshold Voltage

vs. Temperature

SET

= 8.06kΩ

)

Temperature (

RCH

(V)

4.02

4.04

4.06

4.08

4.10

4.12

4.14

4.16

4.18

-50 -25 0 25 50 75 100

Preconditioning Charge Current

vs. Supply Voltage

(V)

TRICKLE

(mA)

4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.

SET

= 8.06kΩ

SET

= 5.36kΩ

SET

= 16.2kΩ

SET

= 31.6kΩ

Preconditioning Charge Current

vs. Temperature

SET

= 8.06kΩ

)

Temperature (

TRICKLE

(mA)

19.2

19.4

19.6

19.8

20.0

20.2

20.4

20.6

20.8

-50 -25 0 25 50 75 100

Preconditioning Threshold Voltage

vs. Temperature

SET

= 8.06kΩ

)

Temperature (

MIN

(V)

2.97

2.98

2.99

3.01

3.02

3.03

-50 -25 0 25 50 75 100

Operating Current vs. Temperature

SET

= 8.06kΩ

)

Temperature (

(µA)

300

350

400

450

500

550

-50 -25 0 25 50 75 100

Operating Supply Current vs. Set Resistor

SET

(kΩ

)

(µA)

100

1000

1 10 100

BAT

= 2.85V

BAT

= 3.6V

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

63681.2006.05.1.1

Typical Characteristics

IL_ENABLE

vs. Supply Voltage

SET

= 8.06kΩ

)

(V)

IL_ENABLE

(V)

0.6

0.7

0.8

0.9

1.1

4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5

-40°C

25°C 85°C

IH_ENABLE

vs. Supply Voltage

SET

= 8.06kΩ

)

(V)

IH_ENABLE

(V)

0.7

0.8

0.9

1.1

1.2

4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5

-40°C

25°C 85°C

Sleep Mode Current vs. Supply Voltage

SET

= 8.06kΩ

)

(V)

SLEEP

(nA)

100

200

300

400

500

600

700

800

4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5

85°C

25°C-40°C

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 7

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

83681.2006.05.1.1

Functional Block Diagram

Charge

Control

Current

Compare

Reverse Blocking

CV/

Precharge

Constant

Current

ADP BAT

ISET

UVLO

Over-

Temperature

Protection

Charge

Status

STAT

GND

Functional Description

The AAT3681 is a high performance battery charg-

er designed to charge single cell lithium-ion/poly-

mer batteries with up to 300mA of current from an

external power source. It is a stand-alone charging

solution, with just one external component required

for complete functionality. The AAT3681 precisely

regulates battery charge voltage and current for

4.2V lithium-ion/polymer battery cells.

The adapter/USB charge input constant current

level can be programmed up to 300mA for rapid

charging applications. The AAT3681 is rated for

operation from -40°C to +85°C. In the event of oper-

ating ambient temperatures exceeding the power

dissipation abilities of the device package for a given

constant current charge level, the charge control will

enter into thermal limit.

A status monitor output pin is provided to indicate

the battery charge state by directly driving one

external LED.

Device junction temperature and charge state are

fully monitored for fault conditions. In the event of

an over-voltage or over-temperature failure, the

device will automatically shut down, protecting the

charging device, control system, and the battery

under charge.

Charging Operation

The AAT3681 has four basic modes for the battery

charge cycle: pre-conditioning/trickle charge; con-

stant current/fast charge; constant voltage; and

end of charge. (See Figure 1.)

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 9

Battery Preconditioning

Before the start of charging, the AAT3681 checks

several conditions in order to assure a safe charging

environment. The input supply must be above the

minimum operating voltage, or under-voltage lock-

out threshold (VUVLO), for the charging sequence to

begin. When these conditions have been met and a

battery is connected to the BAT pin, the AAT3681

checks the state of the battery. If the cell voltage is

below the preconditioning voltage threshold (VMIN),

the charge control begins preconditioning the cell.

The battery preconditioning trickle charge current is

equal to the fast charge constant current divided by

10. For example, if the programmed fast charge cur-

rent is 300mA, then the preconditioning mode (trick-

le charge) current will be 30mA. Cell preconditioning

is a safety precaution for deeply discharged battery

cells and also aids in limiting power dissipation in the

pass transistor when the voltage across the device

is at the greatest potential.

Constant Current Charging

Battery cell preconditioning continues until the volt-

age on the BAT pin exceeds the preconditioning

voltage threshold (VMIN). At this point, the AAT3681

begins the constant current charging phase. The

charge constant current (ICH) amplitude is pro-

grammed by the user via the RSET resistor. The

AAT3681 remains in the constant current charge

mode until the battery reaches the voltage regula-

tion point, VBAT.

Constant Voltage Charging

The system transitions to a constant voltage charg-

ing mode when the battery voltage reaches the

output charge regulation threshold (VBAT) during

the constant current fast charge phase. The regu-

lation voltage level is factory programmed to 4.2V

(±0.5%). Charge current in the constant voltage

mode drops as the battery cell under charge reach-

es its maximum capacity.

End of Charge Cycle Termination and Recharge

Sequence

When the charge current drops to 10% of the pro-

grammed fast charge current level in the constant

voltage mode, the device terminates charging and

goes into a sleep state. The charger will remain in

a sleep state until the battery voltage decreases to

a level below the battery recharge voltage thresh-

old (VRCH).

When the input supply is disconnected, the charg-

er will automatically transition into a power-saving

sleep mode. Only consuming an ultra-low 0.3µA in

sleep mode, the AAT3681 minimizes battery drain

when it is not charging. This feature is particularly

useful in applications where the input supply level

may fall below the battery charge or under-voltage

lockout level. In such cases where the AAT3681

input voltage drops, the device will enter sleep

mode and automatically resume charging once the

input supply has recovered from the fault condition.

Figure 1: Current vs. Voltage Profile During Charging Phases.

Constant Current

Charge Phase

Constant Voltage

Charge Phase

Preconditioning

Trickle Charge

Phase

Charge Complete Voltage

Constant Current Mode

Voltage Threshold

Regulated Current

Trickle Charge and

Termination Threshold

I = CC / 10

I = Max CC

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

10 3681.2006.05.1.1

System Operation Flow Chart

Power On Reset

Power Input

Voltage

> V

UVLO

Fault Conditions

Monitoring

OV, OT

Preconditioning

Test

MIN

> V

BAT

Current Phase Test

> V

BAT

Voltage Phase Test

BAT

> I

TERM

Yes

Preconditioning

(Trickle Charge)

Constant

Current Charge

Mode

Constant

Voltage Charge

Mode

Yes

Charge Completed

Charge

Control

Recharge Test

RCH

> V

BAT

Yes

Shut Down Yes

Enable

Yes

Application Information

Adapter or USB Power Input

Constant current charge levels up to 300mA may

be programmed by the user when powered from a

sufficient input power source. The AAT3681 will

operate from the adapter input over a 4.0V to 6.5V

range. The constant current fast charge current for

the adapter input is set by the RSET resistor con-

nected between ISET and ground. Refer to Table 1

for recommended RSET values for a desired con-

stant current charge level.

Adapter Input Charge Inhibit and Resume

The AAT3681 has a UVLO and power on reset fea-

ture so that if the input supply to the ADP pin drops

below the UVLO threshold, the charger will sus-

pend charging and shut down. When power is re-

applied to the ADP pin or the UVLO condition

recovers, the system charge control will assess the

state of charge on the battery cell and will auto-

matically resume charging in the appropriate mode

for the condition of the battery.

Enable / Disable

The AAT3681 provides an enable function to con-

trol the charger IC on and off. The enable (EN) pin

is internally pulled down. When pulled to a logic

high level, AAT3681 is enabled. When left open or

pulled to a logic low level, the AAT3681 will be shut

down and forced into the sleep state. Charging will

be halted regardless of the battery voltage or

charging state. When the device is re-enabled, the

charge control circuit will automatically reset and

resume charging functions with the appropriate

charging mode based on the battery charge state

and measured cell voltage on the BAT pin.

Programming Charge Current

The fast charge constant current charge level is

user programmed with a set resistor placed

between the ISET pin and ground. The accuracy of

the fast charge, as well as the preconditioning trick-

le charge current, is dominated by the tolerance of

the set resistor used. For this reason, a 1% toler-

ance metal film resistor is recommended for the set

resistor function. Fast charge constant current lev-

els from 15mA to 300mA may be set by selecting

the appropriate resistor value from Table 1.

Table 1: RSET Values.

Figure 2: Constant Charging Current

vs. Set Resistor Values.

Protection Circuitry

Over-Voltage Protection

An over-voltage event is defined as a condition

where the voltage on the BAT pin exceeds the

maximum battery charge voltage and is set by the

over-voltage protection threshold (VOVP). If an over-

voltage condition occurs, the AAT3681 charge con-

trol will shut down the device until voltage on the

BAT pin drops below VOVP. The AAT3681 will

resume normal charging operation after the over-

voltage condition is removed.

Over-Temperature Shutdown

The AAT3681 has a thermal protection control circuit

which will shut down charging functions should the

internal die temperature exceed the preset thermal

limit threshold. Once the internal die temperature

falls below the thermal limit, normal operation will

resume the previous charging state.

SET

(kΩ

)

(mA)

100

1000

1 10 100 1000

Nominal Set Resistor

ICHARGE (mA) Value (kΩΩ)

300 5.36

250 6.49

200 8.06

150 10.7

100 16.2

50 31.6

40 38.3

30 53.6

20 78.7

15 105

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 11

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

12 3681.2006.05.1.1

Charge Status Output

The AAT3681 provides battery charge status via a

status pin. This pin is internally connected to an N-

channel open drain MOSFET, which can be used to

drive an external LED. The status pin can indicate

the following conditions:

Table 2: LED Status Indicator.

The LED should be biased with as little current as

necessary to create reasonable illumination; there-

fore, a ballast resistor should be placed between

the LED cathode and the STAT pin. LED current

consumption will add to the overall thermal power

budget for the device package, hence it is good to

keep the LED drive current to a minimum. 2mA

should be sufficient to drive most low-cost green or

red LED. It is not recommended to exceed 8mA for

driving an individual status LED.

The required ballast resistor values can be esti-

mated using the following formulas:

Example:

Note: Red LED forward voltage (VF) is typically

2.0V @ 2mA.

Thermal Considerations

The AAT3681 is offered in a SC70JW-8 package

which can provide up to 687mW of power dissipa-

tion when it is properly bonded to a printed circuit

board and has a maximum thermal resistance of

160°C/W. Many considerations should be taken

into account when designing the printed circuit

board layout, as well as the placement of the

charger IC package in proximity to other heat gen-

erating devices in a given application design. The

ambient temperature around the charger IC will

also have an effect on the thermal limits of a bat-

tery charging application. The maximum limits that

can be expected for a given ambient condition can

be estimated by the following discussion.

First, the maximum power dissipation for a given

situation should be calculated:

Where:

PD(MAX) = Maximum Power Dissipation (W)

θJA = Package Thermal Resistance (°C/W)

TJ(MAX) = Maximum Device Junction Temperature

(°C) [135°C]

TA= Ambient Temperature (°C)

Figure 3 shows the relationship of maximum power

dissipation and ambient temperature of AAT3681.

Figure 3: Maximum Power Dissipation.

Next, the power dissipation can be calculated by

the following equation:

= [(V

- V

BAT

)

+ (V

)]

(°

D(MAX)

(mW)

200

400

600

800

1000

0 20 40 60 80 100

J(MAX)

)

D(MAX)

= θ

(5.5V

- 2.0

= = 1.75kΩ

2mA

ADP

F(LED)

)

LED

Event Description Status

No battery charging activity OFF

Battery charging via adapter ON

or USB port

Charging completed OFF

Where:

PD= Total Power Dissipation by the Device

VIN = Input Voltage

VBAT = Battery Voltage as Seen at the BAT Pin

ICH = Constant Charge Current Programmed for

the Application

IOP = Quiescent Current Consumed by the

Charger IC for Normal Operation [0.5mA]

By substitution, we can derive the maximum

charge current before reaching the thermal limit

condition (thermal cycling). The maximum charge

current is the key factor when designing battery

charger applications.

In general, the worst condition is the greatest volt-

age drop across the charger IC, when battery volt-

age is charged up to the preconditioning voltage

threshold. Figure 4 shows the maximum charge

current in different ambient temperatures.

Figure 4: Maximum Charging Current Before

Thermal Cycling Becomes Active.

Capacitor Selection

Input Capacitor

In general, it is good design practice to place a

decoupling capacitor between the ADP pin and

GND. An input capacitor in the range of 1µF to

22µF is recommended. If the source supply is

unregulated, it may be necessary to increase the

capacitance to keep the input voltage above the

under-voltage lockout threshold during device

enable and when battery charging is initiated. If the

AAT3681 adapter input is to be used in a system

with an external power supply source, such as a

typical AC-to-DC wall adapter, then a CIN capacitor

in the range of 10µF should be used. A larger input

capacitor in this application will minimize switching

or power transient effects when the power supply is

"hot plugged" in.

Output Capacitor

The AAT3681 only requires a 1µF ceramic capaci-

tor on the BAT pin to maintain circuit stability. This

value should be increased to 10µF or more if the

battery connection is made any distance from the

charger output. If the AAT3681 is to be used in

applications where the battery can be removed

from the charger, such as with desktop charging

cradles, an output capacitor greater than 10µF may

be required to prevent the device from cycling on

and off when no battery is present.

Printed Circuit Board Layout

Considerations

For the best results, it is recommended to physically

place the battery pack as close as possible to the

AAT3681 BAT pin. To minimize voltage drops on the

PCB, keep the high current carrying traces ade-

quately wide. Refer to the AAT3681 evaluation board

for a good layout example (see Figures 5 and 6).

(V)

CH(MAX)

(mA)

100

150

200

250

300

4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5 6.7

= 25°C

= 60°C

= 85°C

= 45°C

J(MAX)

)

- V

BAT

CH(MAX)

D(MAX)

)

- V

BAT

CH(MAX)

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 13

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

14 3681.2006.05.1.1

Figure 5: AAT3681 Evaluation Board Figure 6: AAT3681 Evaluation Board

Top Layer. Bottom Layer.

Figure 7: AAT3681 Evaluation Board Schematic Diagram.

Table 3: AAT3681 Evaluation Board Bill of Materials.

Component Part Number Description Manufacturer

U1 AAT3681IJS-T1 USB/ADP Battery Charger; AnalogicTech

SC70JW-8 Package

R1 Chip Resistor 1kΩ, 5%, 1/4W; 0603 Vishay

R8 Chip Resistor 8.06kΩ, 1%, 1/4W; 0805 Vishay

JP1 Chip Resistor 0Ω, 5%, 1/4W; 0603 Vishay

C1 GRM21BR61A106KE19L CER 10µF 10V 10% X5R 0805 Murata

C2 GRM21BR71A225KA01L CER 2.2µF 10V 10% X7R 0805 Murata

JP2 PRPN401PAEN Connecting Header, 2mm Zip Sullins Electronics

LED1 CMD15-21SRC/TR8 Red LED; 1206 Chicago Miniature Lamp

RED LED

D1 R1

10µF

C1 2.2µF

IN(ADP)

BAT

8.06K

JP2

JP1

0Ω

ISET

BAT

ADP

STAT

GND

AAT3681

U1 (SC70JW-8)

AAT3681

USB Port or AC Adapter

Lithium-Ion/Polymer Battery Charger

3681.2006.05.1.1 15

Advanced Analogic Technologies, Inc.

830 E. Arques Avenue, Sunnyvale, CA 94085

Phone (408) 737-4600

Fax (408) 737-4611

Ordering Information

Package Information

SC70JW-8

All dimensions in millimeters.

0.225

0.075

0.45

0.10

0.05

2.10

0.30

2.00

0.20

1.75

0.10

0.85

0.15

0.05

1.10 MAX

0.100

2.20

0.20

0.048REF

0.50 BSC 0.50 BSC 0.50 BSC

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semiconductor products that are in compliance with current RoHS standards, including

the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more

information, please visit our website at http://www.analogictech.com/pbfree.

Package Marking1Part Number (Tape and Reel)2

SC70JW-8 REXYY AAT3681IJS-4.2-T1

1. XYY = assembly and date code.

2. Sample stock is generally held on part numbers listed in BOLD.

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warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and other quality con-

trol techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed.

AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and product names appearing in this document are regis-

tered trademarks or trademarks of their respective holders.