AT1369

Preliminary Product Information

2-Channel Synchronous Buck PWM Controller

with Power Good Reset

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

Tel: 886-3-563-0878

Fax: 886-3-563-0879

4

Electrical Characteristics

(VCC = 5V,Ta =+25℃ , unless otherwise noted. )

Values

Parameter

Symbol

Condition

Min. Typ. Max.

Unit

Input Supply Range

V

CC

2.5

--

7.0

V

Quiescent Current

I

CC

Duty=50%,

fOSC=600KHz

PDRV/NDRV No Load

1.5

2.0

mA

Current in standby mode

I

ST

CTL=0V

10

µA

Reference Voltage

V

REF

Ta =-20℃ to +85℃

1.20 1.22 1.24

V

Reference Voltage

line-regulation

V

REF-Line

VCC=2.5V to 7.0V

110

mV

Entire device

Rference Variation

with Temperature

Ta =-20℃ to +85℃

0.5

1.5

%

Input Offset Voltage

V

IO

10

mV

Source Current

I

OH

V

-1.0

-1.5

-2.0

mA

Sink Current

I

OL

V

160

120

80

μ

A

Source current Variation

with temperature

Ta =-20℃ to +85℃

20

%

Sink current Variation

with temperature

Ta =-20℃ to +85℃

20

%

Unity Gain Bandwidth

f

T

10.0

MHz

Common Mode Input

Voltage Range

V

COM

0.2

1.5

V

Error amplifier

DC Open Loop Gain

A

V

110

dB

fosc

AT1369A

250

300

350 KHz

Frequency

fosc

AT1369B

500

600

700 KHz

High Level Voltage

1.0

V

Low Level Voltage

0.5

V

Variation with Power

Supply

Vcc=2.5V to 7V

2

%

Sawtooth wave

oscillator (OSC)

Variation with

temperature

Ta =-20℃ to +85℃

7%

Charge Current of

SS1,2

I

CSS1,2

-1.5

-1.0

-0.8

µA

Soft-Start

Invalid threshold

voltage of SS1,2

1.0

V

Charge Current of

SCP

I

CSCP

-1.7 -1.25 -1.0

µA

Short-Circuit

Threshold Voltage of

SCP

0.9

V