AP1128S - Anachip Corporation - Datasheet.Directory

3A Bus Terminator Regulator

AP1128

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev.1.0 Jul 20, 2005

1/7

 Features

- Ideal for DDR-I and DDR-II applications

- Capable of sourcing and sinking current 1.5A/3A

- Current limiting protection

- Thermal protection

- Current-shoot-through protection

- High accuracy output voltage at full load

- Minimum external components

- Adjustable VOUT by external resistors

- Shutdown for standby or suspend mode operation

with high-impedance output

- TO252-5 and SOP-8 Pb-free Package

 Applications

- Mother Board DDR-SDRAM Termination

- Mother Board DDR-II Termination

- Game / Play Station

- Set Top Box

- PCI / AGP Graphics

- IPC

- SCSI-III Bus Termination

 General Description

AP1128 is a linear regulator designed as a

cost-effective solution for active termination of DDR

SDRAM. The converting voltage range is from 1.6V

to 6V into a desired output voltage, which is

adjusted by two external resistors. The current

sourcing and sinking capability of the regulator is up

to 1.5A/3A while the output voltage within 2%/3%.

This device provides on-chip thermal shutdown and

current limit functions for circuit tolerance of the

output fault conditions. SO-8 and TO-252-5L

packages are available for all commercial and

industrial surface mount applications.

 Pin Assignment

5

3

1V

IN

V

OUT

GND

TO252-5L

( Top View )

2

4

V

CNTL(TAB)

V

REFEN

1

2

3

7

6

54

8

(Top View)

V

CNTL

V

CNTL

V

CNTL

V

CNTL

V

IN

GND

V

REFEN

SOP-8L

V

OUT

 Pin Descriptions

Pin Name Descriptions

VIN Power Input

VCNTL Gate Drive Voltage

VREFEN Reference Voltage Input and Chip

Enable

GND Ground

VOUT Output Voltage

3A Bus Terminator Regulator

AP1128

Anachip Corp.

www.anachip.com.tw Rev.1.0 Jul 20, 2005

2/7

 Ordering Information

AP1128 X X

Package

D: TO252-5

S: SOP-8

Packing

Blank : Tube

A : Taping

 Block Diagram

CNTL

V

IN

Cuurent Limiting

Sensor

V

REFEN

V

CNTL

V

OUT

GND

Thermal

 Typical Circuit

C3

10uF

R2

100K

C2

1000uF

U1 AP1128

1

2

3

45

6

7

8

V

IN

GND

V

REFEN

V

OUT

V

CNTL

V

OUT

= 1.25V

R1

100K

C

CNTL

47uF

V

CNTL

= 3.3V

V

IN

= 2.5V

EN

C1

470uF

V

CNTL

V

CNTL

V

CNTL

 Absolute Maximum Ratings

Symbol Parameter Rating Unit

VIN Power Input Voltage 6 V

PD Power Dissipation internal limited

HBM ESD Rating 3 KV

TSTG Storage Temperature -55 to 150 oC

TLead Lead Temperature (Soldering 5 sec) 260 oC

SOP-8 (Note 3) 20

θJC Thermal Resistance TO252-5 6

oC/W

SOP-8 80

θJA Thermal Resistance TO252-5 40

oC/W

3A Bus Terminator Regulator

AP1128

Anachip Corp.

www.anachip.com.tw Rev.1.0 Jul 20, 2005

3/7

 Electrical Characteristics

VIN = +2.5V, VCNTL = +3.3V, VREFEN = +1.25V, COUT = 10uF (Ceramic)

Symbol Parameter Conditions Min. Typ. Max. Unit

VOS Output Offset Voltage (Note 1) I

OUT=0A -20 -5 20 mV

IL: 0A --> 1.5A - 0.5 2

∣∆VLOAD∣ Load Regulation IL: 0A --> -1.5A - 0.5 2 %

VIN Input Voltage Range (DDR I/II) (Note2) VCNTL ≥ VIN 1.6 2.5/1.8 - V

VCNTL Gate Drive Voltage Range (Note2) VCNTL ≥ VIN - 3.3 6 V

ICNTL Operation Current of VCNTL I

OUT = 0A - 3 6 mA

ISHDN Current in Shutdown VREFEN < 0.2V,

RL=180Ω - 10 90 uA

IQ Quiescent Current IOUT=0A - 1 3 mA

Short Circuit Protection

SOP-8 - 2 -

ILIMIT Current Limit TO-252 - 3 -

A

Over Temperature Protection

TOS Thermal Shutdown Temperature 3.3V ≤ VCNTL ≤ 5V - 140 -

oC

Shutdown Function

Shutdown Threshold Trigger Output = High 0.8 - -

Shutdown Threshold Trigger Output = Low - - 0.2 V

Note 1: VOS is the voltage measurement VOUT subtracted from VREFEN.

Note 2: Keep VCNTL ≥ VIN at power on/off sequences.

Note 3: Surface mounted on 1 in2 copper pad of FR4 board

 Typical Performance Characteristics

1.20

1.22

1.24

1.26

1.28

1.30

1.5 1.6 1.7 1.9 2.1 2.3 2.5

V

IN

(V)

V

OUT

(V)

Fig 1. Line Regulation ( VIN v.s. VOUT )

1.20

1.22

1.24

1.26

1.28

1.30

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0

V

CNTL

(V)

V

OUT

(V)

Fig 2. Line Regulation ( VCNTL v.s. VOUT )

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

2.02.53.03.54.04.55.05.56.0

V

CNTL

(V)

I

CNTL

(mA)

Fig 3. Line Regulation ( VCNTL v.s. ICNTL )

3A Bus Terminator Regulator

AP1128

Anachip Corp.

www.anachip.com.tw Rev.1.0 Jul 20, 2005

4/7

 Typical Performance Characteristics (Continued)

Fig 4. Output Short-Circuit Protection

Fig 5. Output Short-Circuit Protection

VIN=2.5V, VCNTL=3.3V, VREFER=1.25V, Temp(IC Body) = 98oC

Fig 7. Transient Response

VIN=1.8V, VCNTL=3.3V, VREFER=0.9V

Fig 8. Transient Response

-1.5A

Output Transient Voltage

VREFER=1.25V

Output Current

1.5A

-1.5A

Output Transient Voltage

VREFER=0.9V

Output Current

1.5A

3A Bus Terminator Regulator

AP1128

Anachip Corp.

www.anachip.com.tw Rev.1.0 Jul 20, 2005

5/7

 Typical Performance Characteristics (Continued)

Fig 9. Safe Operating Area

 Marking Information

1128

Part Number

Logo

ID Code

Xth Week: 01~52

Year:

(Top View)

"02" = 2002

"01" = 2001

X X X X X

~

(TO252-5)

8 5

14

( Top View )

Logo

Part No.

ID code: internal

Year: "01" =2001

"02" =2002

Xth week: 01~52

~

AP1128

YY WW X

(SOP-8)

3A Bus Terminator Regulator

AP1128

Anachip Corp.

www.anachip.com.tw Rev.1.0 Jul 20, 2005

6/7

 Package Information

(1) Package Type: TO252-5

B

A

G

S

M

D

H

J

5.6

11.0

5.6

2.0

1.27

Land Pattern Recommendation (Unit: mm)

7.2

0.6

P(TYP.)

C

K

L

Dimensions In Millimeters Dimensions In Inches

Symbol Min. Nom. Max. Min. Nom. Max.

A 6.35 6.60 6.85 0.250 0.260 0.270

B 5.20 5.35 5.50 0.205 0.211 0.217

C 6.80 7.00 7.30 0.268 0.276 0.287

D 2.20 2.50 2.80 0.087 0.098 0.110

P 1.27 REF. 0.050 REF.

S 0.50 0.65 0.80 0.020 0.026 0.031

G 0.40 0.50 0.63 0.016 0.020 0.025

H 2.20 2.30 2.40 0.087 0.091 0.094

J 0.45 0.52 0.58 0.018 0.020 0.023

K 0.00 0.08 0.15 0.000 0.003 0.006

L 0.90 1.20 1.63 0.035 0.047 0.064

M 5.40 5.80 6.20 0.213 0.228 0.244

3A Bus Terminator Regulator

AP1128

Anachip Corp.

www.anachip.com.tw Rev.1.0 Jul 20, 2005

7/7

 Package Information (Continued)

(2) Package Type: SOP-8

VIEW "A"

L

C

VIEW "A"

H

E

A

A2

A1

B

e

D

7(4X) 0.015x45 7(4X)

y

Dimensions In Millimeters Dimensions In Inches

Symbol Min. Nom. Max. Min. Nom. Max.

A 1.40 1.60 1.75 0.055 0.063 0.069

A1 0.10 - 0.25 0.040 - 0.100

A2 1.30 1.45 1.50 0.051 0.057 0.059

B 0.33 0.41 0.51 0.013 0.016 0.020

C 0.19 0.20 0.25 0.0075 0.008 0.010

D 4.80 5.05 5.30 0.189 0.199 0.209

E 3.70 3.90 4.10 0.146 0.154 0.161

e - 1.27 - - 0.050 -

H 5.79 5.99 6.20 0.228 0.236 0.244

L 0.38 0.71 1.27 0.015 0.028 0.050

y - - 0.10 - - 0.004

θ 0o - 8o 0

o - 8o