AIC1729-2121CS - Analog Integrations Corporation

ADVANCE INFORMATION AIC1729

400mA LOW DROPOUT LINEAR REGULATO R WITH VOLTAGE DETECT OR FUNCTIO N

SPEC NO: DS-1729-P1 04/27/00

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4 F, 9 In d us tr y E . 9t h Ro a d, S ci en c e- ba s ed I nd us t ri a l P ar k , H s in ch u , T a iw an , R .O . C . TEL: (8863)577-2500 FAX:(8863)577-2510 1

! FEATURES

" Including MOSFET for VOUT 1, LDO for VOUT2,

voltage detector, and shutdown control

" Low Dropout Voltage of 650mV(Typ.) at 400mA

Output Current (VOUT2).

" Guaranteed 400mA Output Current for VOUT1

and VOUT2.

" Low Ground Current at 100µA.

" 2% Accuracy Output Voltage of VOUT2.

" Current Limit Function.

" Built in Volta ge Detec tor

" Shutdown Control for VOUT1 and VOUT2

! APPLICATIONS

" Voltage Regulator for DVD-ROM and CD-ROM

Drivers.

! DESCRIPTION

The AIC1729 is a low dropout linear regulator

with voltage detec t ion func tion .

It can be divided into 5 main function blocks,

including MOSFET for VOUT1, LDO for

VOUT2 ,voltage detector, and two shutdown

controls.

Voltage detector can be use to detect Vcc. The

detecting voltage of the voltage detector is from

2.0V to 4.5V with 0.1V step. And the output

(DOUT) of detecting voltage for Vcc with delay

time adjustment function to indicate VCC low. User

only adds one external capacitor to finish it.

When VCC pin is under the set detection voltage.

DOUT pin is logic low.

Vou1 is c on t rol led by SD1 pin. When SD1 is l og ic

high, the internal MOSFET for VOUT1 will be

switched off, vice versa.

The LDO output voltage (VOUT2) is from 2.0V to

4.5V with 0.1V step for different application. It is

also controlled by SD2 pin. When SD2 is logic

high, the i nter n al LDO for VOUT2 will be sh utdown,

vice vers a.

The superior characteristics of the AIC1729

include very low dropout voltage, and 2%

accuracy output voltage. Typical ground current

remains 100µA, from no load to maximum

loading conditions. Dropout voltage of VOUT2 is

650mV at 400mA output current. Output current

limiting is provided at VOUT1 an d VOUT2.

AIC1729 comes in the popular SO8 package.

AIC1729

400mA LOW DROPOUT LINEAR REGULATO R WITH VOLTAGE DETECT OR FUNCTIO N

SPEC NO: DS-1729-P1 04/27/00

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4 F, 9 In d us tr y E . 9t h Ro a d, S ci en c e- ba s ed I nd us t ri a l P ar k , H s in ch u , T a iw an , R .O . C . TEL: (8863)577-2500 FAX:(8863)577-2510 2

! TYPICAL APPLICATION CIRCUIT

! ORDERING INFORMATION

ORDER NUMBER

AIC1729CN

(PLASTIC DIP)

AIC1729CS

(PLASTIC SO)

PIN CONFIGURATION

TOP VIEW

VOUT2

VOUT1

DOUT

GND

SD1

SD2

VCC

PACKAGE TYPE

N: PLASTIC DIP

S: SMALL OUTLINE

LDO OUTPUT VOLTAGE

20: 2.0V

45: 4.5V

VOLTAGE DETECTOR VOLTAGE

20: 2.0V

45: 4.5V

*LDO Output Voltage and Voltage Detector voltage with every 0.1V a Step.

AIC1729- AA B BCX

! ABSOLUTE MAXIMUM RATINGS

Input Supply Voltage ...................................………….................................... -0.3~8V

Operating Junction Temperature Range .......………...........…................... -40°C~ 85°C

Storage Temperature Range .........................………….......................... -65°C~150°C

Thermal Resistance θJA

SOIC Package ....…….…………………………………….......... 100°C/W

SOIC Package(with 3 square inches of Copper) .…………… 90°C/W

AIC1729

400mA LOW DROPOUT LINEAR REGULATO R WITH VOLTAGE DETECT OR FUNCTIO N

SPEC NO: DS-1729-P1 04/27/00

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4 F, 9 In d us tr y E . 9t h Ro a d, S ci en c e- ba s ed I nd us t ri a l P ar k , H s in ch u , T a iw an , R .O . C . TEL: (8863)577-2500 FAX:(8863)577-2510 3

! ELECTRICAL CHARACTERISTICS (Ta=25°

°°

°C, VIN=5.0V, IOUT1=IOUT2 =400mA, SD1=SD2=Low

unless otherwise specified.)

PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT

Ground Current Io=0.1mA~400mA

Vin = 4. 0V~8.0V 100 µA

Output Volta ge

Temperature Coefficiency (Note 1) 100 PPM/°C

Vout1

Output MOSF ET

Resistance 370 mΩ

Current Limit

(Note 3) 650 mA

Output Turn-on Rise Delay 100 µS

Output Turn-on Rise Time 1000 µS

SD1 Pin Voltage VSD=Logic”0”

VSD=Logic”1” 2.4 0.8 V

Vout2 ( 2.0V ~ 4.5V With 0.1V Step )

LDO Output Voltage No Load VSET0.98 VVSET VSET1.02 V

Line Regulation IL=1mA,VIN=4.0V~8.0V 3 10 mV

Load Regulation

(Note 2) VIN=5V,IL=0.1mA~400mA 20 50 mV

Current Limit

(Note 3) 650 mA

Dropout Voltage

(Note 4) IL=0.1mA

IL=400mA 0.2

650 10

800 mV

SD2 Pin Voltage VSD=Logic”0”

VSD=Logic”1” 2.4 0.8 V

Voltage Detector ( 2.0V ~ 4.5V with 0.1V Step )

Detect Voltag e( VDET)V

DSET0.98 VDSET VDSET1.02 V

Detect Threshold

Hysteresis VDET1.05 V

Vdout When VDET is Detected

When VDET is not Detected 1.65 0.6 V

Delay Time CD Pin Open 1 mS

Note 1: Guaranteed by design.

Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low ON time.

Note 3: Current limit is measured by pulsing a short time.

Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV

below the value measured with a 1V differential.

AIC1729

400mA LOW DROPOUT LINEAR REGULATO R WITH VOLTAGE DETECT OR FUNCTIO N

SPEC NO: DS-1729-P1 04/27/00

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4 F, 9 In d us tr y E . 9t h Ro a d, S ci en c e- ba s ed I nd us t ri a l P ar k , H s in ch u , T a iw an , R .O . C . TEL: (8863)577-2500 FAX:(8863)577-2510 4

! BLOCK DIAGRAM

! PIN DESCRIPTION

PIN 1: VCC- This pin is the main input supply for the

IC, normally 5V

PIN 2: CD- This pin is to determine delay time by

attaching a cap acitor

PIN 3: DOUT-This pin is voltage detector output,

pulled low when Din detected

PIN 4: GND- IC ground pin

PIN 5: SD2- VOUT2 shutdown pin. Logic high input

for disabling LDO output.

PIN 6: VOUT2- This pin is 3.3V LDO voltage output

PIN 7: SD1- VOUT1 shutdown pin. Logic high input

for disabling the internal MOS Switch.

PIN 8: VOUT1-This pin is the voltage output which is

connected to Vcc directly via internal

MOSFET switch, normally 5V

! PHYSICAL DIMENSIONS

" 8 LEAD PLASTIC SO (unit: mm)

SYMBOL MIN MAX

A 1.35 1.75

A1 0.10 0.25

B 0.33 0.51

C 0.19 0.25

D 4.80 5.00

E 3.80 4.00

e 1.27(TYP)

H 5.80 6.20

L 0.40 1.27

AIC1729

400mA LOW DROPOUT LINEAR REGULATO R WITH VOLTAGE DETECT OR FUNCTIO N

SPEC NO: DS-1729-P1 04/27/00

ANALOG INTEGRATIONS CORPORATION www.analog.com.tw

4 F, 9 In d us tr y E . 9t h Ro a d, S ci en c e- ba s ed I nd us t ri a l P ar k , H s in ch u , T a iw an , R .O . C . TEL: (8863)577-2500 FAX:(8863)577-2510 5

" 8 LEAD PLASTIC DIP (unit: mm)

SYMBOL MIN MAX

A1 0.381 —

A2 2.92 4.96

b 0.35 0.56

C 0.20 0.36

D 9.01 10.16

E 7.62 8.26

E1 6.09 7.12

e 2.54 (TYP)

eB — 10.92

L 2.92 3.81