AT1601B - Aimtron Technology

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

1

Features

•Built-In (Typical 110mΩ at 5.0V)

N-Channel MOSFET

•Output can be Forced Higher Than Input

(Off-State)

• Low Supply Current

100µA Typical On-State Current

1µA Typical Off-State Current

•1A minimum Continuous Load Current

•1.4A Typical Current Limit

•Open-Drain Fault Flag Output

•Hot Plug-In Application(Soft-Start)

•1.8V to 5.5V Operating Range

•1.7V Under-Voltage-Lockout(UVLO)

•Thermal Shutdown Protection

•SOP8 Package

Applications

•High-Side Power Protection Switch

•USB Power Management

•Notebook, Motherboard PCs

General Description

The AT1601 is an integrated high-side power

switch optimized for self-powered and bus-

powered Universal Serial Bus (USB) applications.

With built-in a charge pump circuitry to drive the

internal MOSFET switch, the switch’s low on-

resistance meets USB voltage drop requirements.

A flag output is available to indicate fault

conditions to the local USB controller.

The AT1601 includes soft-start to limit inrush

current during plug-in, 1.4A current limit to limit

the output current to a safe level which meet the

UL 25VA safety requirements, thermal shutdown

to prevent catastrophic switch failure from high-

current loads, under voltage lockout (UVLO) to

ensure that the device remains off unless there is a

valid input voltage present, and an enable input

that is compatible with both 3.3V and 5V logic.

System Block

Aimtron reserves the right without notice to change this circuitry and specifications.

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

2

Ordering Information

Part Number Package Marking EN

AT1601A SOP8 AT1601AS

AT1601A_GRE SOP8,Green AT1601AS,date code with one bottom line

Active

High

AT1601B SOP8 AT1601BS

AT1601B_GRE SOP8,Green AT1601BS,date code with one bottom line

Active

Low

Pin Assignment

Pin Description

Pin No. Symbol I/O Description

1 EN I Enable Input: AT1601A high active, AT1601B low active

2 FLG O Open-Drain Fault Flag Output

3 GND P Ground

4,5 NC -

7 IN P Input Power

6,8 OUT P Switch Output

Absolute Maximum Ratings

Item Symbol Ratings Units

Storage temperature TSTG -55〜＋150 ℃

Operating temperature TOPR -30〜＋85 ℃

IN,OUT,FLG,EN input voltage -0.3〜＋6.5 V

FLG Current IFLG 50 mA

OUT Current IOUT Internal Limited A

ESD Protection * (Human Body Mode) 2 KV

Thermal Resistance θJA 160 °C/W

Lead Temperature(Soldering. 10sec.) 260 °C

*Devices are ESD protected, handling precaution are recommended.

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

3

Recommended Operating Ratings

Item Symbol Ratings Units

Operating temperature TOPR -20〜＋85 ℃

IN input voltage 1.8〜5.5 V

EN input voltage 0〜5.5 V

Electrical Characteristics

(VIN=5.0V, Ta=+250C)

Values

Parameter Symbol Condition

Min. Typ. Max.

Unit

Switch Off, OUT=Open

VIN=5.0V -18

µA

Input Supply Current IIN1 Switch Off, OUT=Open

VIN=3.3V -15

µA

Switch On, OUT=Open

VIN=5.0V -120160

µA

Input Supply Current IIN2 Switch On, OUT=Open

VIN=3.3V -100120

µA

VOH Low to High Transition - - 0.5*VCC V

EN Enable Threshold

VOL High to Low Transition 0.4*VCC - - V

EN=2.5V - 0.01 1 µA

EN Input Current IEN

EN=1.0V - 0.01 1 µA

UVLO Threshold VUVLO IN rising 1.5 1.7 - V

UVLO Hysteresis ∆UVLO IN Falling - 0.1 - V

IN=5V, IOUT=500mA - 110 140 mΩ

Switch Resistance RON

IN=3.3V, IOUT=500mA -130180

mΩ

Short Circuit Current

Limit ILimit

Enable into Load,

RLOAD=1Ω1.0 1.4 2.0 A

Short Circuit FoldBack

Current ISC RLOAD=0Ω, measure prior to

thermal shutdown -1.0-A

Ileakage

AT1601A EN=0, RLOAD=0Ω-110

µA

OUT Leakage Current Ileakage

AT1601B EN=IN, RLOAD=0Ω-110

µA

OUT Turn-On Delay tOn-D RLOAD=10Ω-200-

µs

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

4

OUT Turn-On Rise

Time tOn-R RLOAD=10Ω, CLOAD=100µF-0.3-ms

OUT Turn-Off Delay tOff-D RLOAD=10Ω-520

µs

OUT Turn-Off Fall

Time tOff-F RLOAD=10Ω, CLOAD=100µF-0.3-ms

IN=5V, IFLG=10mA -1025-

Ω

FLG Output Resistance RFLG

IN=3.3V, IFLG=10mA -1540

Ω

FLG Off Current IFLGL FLG=IN - 0.01 1 µA

FLG Delay Time tFLGL From fault to FLG assertion 8 12 15 ms

* For AT1601A, off is ≤2.0V and on is ≥2.5V. For AT1601B, off is ≥2.5V and on is

≤2.0V.(IN=5V)

Application Circuit

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

5

Typical Characteristics(VIN=5V,TA=25℃,AT1601A.)

CH1:EN CH2:FLG CH4:IOUT

FLG Delay waveform

CH1:EN CH2:FLG CH3:VOUT

Turn-on Delay waveform

CH1:EN CH2:FLG CH3:Vout CH4:VIN

Power UP (UVLO)

CH1:EN CH2:FLG CH3:VOUTCH4:IOUT

Short Circuit Response

CH1:EN CH2:FLG CH3:VOUT

Turn-off Delay waveform

CH1:EN CH2:FLG CH3:Vout CH4:VIN

Power Down (UVLO)

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

6

CH1:EN CH2:FLG CH3:Vout CH4:VIN

Turn-on CL=47uF

CH1:EN CH2:FLG CH3:Vout CH4:VIN

Turn-on CL=1000uF

CH1:EN CH2:FLG CH3:Vout CH4:VIN

Turn-on CL=220uF

CH1:EN CH2:FLG CH3:Vout CH4:VIN

Turn-on CL=6000uF

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

7

AT1601

Preliminary Product Information

USB High-Side Power Switches with Flag

2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.

Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw

Fax: 886-3-563-0879 Email: service@aimtron.com.tw

8

Package Description: SOP8

INCHES MILLIMETERS

SYMBOL MIN MAX MIN MAX NOTES

A 0.188 0.197 4.80 5.00 -

B 0.149 0.158 3.80 4.00 -

C 0.228 0.244 5.80 6.20 -

D 0.050 BSC 1.27 BSC -

E 0.013 0.020 0.33 0.51 -

F 0.004 0.010 0.10 0.25 -

H 0.053 0.069 1.35 1.75 -

J 0.011 0.019 0.28 0.48

K 0.007 0.010 0.19 0.25 -

M 0.016 0.050 0.40 1.27

L 0.150 REF 3.81 REF -

e1 450450-

α00800080-