3A Bus Terminator Regulator

AP1127

Anachip Corp.

www.anachip.com.tw

Rev.1.1 Jan 17, 2005

3/4

Electrical Characteristics

ratings only and functional device operating is not implied. (Note 1)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

Output Offset Voltage

-20

-

20

mV

Operating Current at VIN

-

-

1

mA

-

0.8/1.2

2/3

∣

-

0.8/1.2

2/3

%

Quiescent Current at VCCA

At room temp.

-

190

230

µA

Current in Shutdown Mode

REFEN < 0.2V,

-

90

110

µA

No load

1.35/1

2.5/1.8

6

V

VCCA

3.75

-

6

V

Short Circuit Protection

Current Limit

-

5

-

A

Short Current

Sinking

2

-

-

A

Short Current

Sourcing

3

-

-

A

Over Thermal Protection

THSD

Thermal Shutdown Temperature 3.75V

≤ VCCA ≤ 6V

125

150

-

Thermal Shutdown Hysteresis

25

30

35

REFEN Function

REFEN Threshold

0.4

0.5

0.6

V

Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions.

Note 3: Keep VCCA

Note 4: Guaranteed by design, not 100% test.

Function Description

The AP1127 is a linear regulator that is capable of

sinking and sourcing 3A of current without an

external heat sink.

The AP1127 integrates power MOSFETs that are

capable of source and sink 3A of current while

maintaining excellent voltage regulation. The output

voltage can be regulated within 3% or less by using

the external feedback. Separate voltage supply

inputs have been added to fit applications with

various power supplies for the data bus and power

buses.

Outputs

bus, address, or clock lines via an external inductor.

Inputs

voltage could be programmable by two external

to VDDQ of memory module for better tracking with

memory VDDQ.

Other Supply Voltages

VCCA provide the voltage supply to the logic section

and internal error amplifiers of AP1127.