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AP1128
3A Bus Terminator Regulator
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
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.
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
Pin Assignment
( Top View )
5 4 3 2 1 VOUT VREFEN VCNTL(TAB) GND VIN
Pin Descriptions
Pin Name VIN VCNTL VREFEN GND VOUT Descriptions Power Input Gate Drive Voltage Reference Voltage Input and Chip Enable Ground Output Voltage
TO252-5L
(Top View) VIN GND VREFEN VOUT 1 2 3 4 8 7 6 5 VCNTL VCNTL VCNTL VCNTL
SOP-8L
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
AP1128
3A Bus Terminator Regulator
Ordering Information
AP1128 X X Package
D: TO252-5 S: SOP-8
Packing
Blank : Tube A : Taping
Block Diagram
VCNTL VIN
Cuurent Limiting Sensor VREFEN Thermal GND CNTL VOUT
Typical Circuit
U1 VIN = 2.5V C1 470uF R1 100K AP1128 VCNTL 8 CCNTL 47uF VCNTL = 3.3V 1V IN 2 GND 3V REFEN 4 VOUT
VCNTL 7 VCNTL 6 VCNTL 5 VOUT = 1.25V
R2 100K
EN
C2 1000uF
C3 10uF
Absolute Maximum Ratings
Symbol VIN PD TSTG TLead JC JA Parameter Power Input Voltage Power Dissipation HBM ESD Rating Storage Temperature Lead Temperature (Soldering 5 sec) Thermal Resistance Thermal Resistance SOP-8 (Note 3) TO252-5 SOP-8 TO252-5 Rating Unit 6 V internal limited 3 KV o -55 to 150 C o 260 C 20 o C/W 6 80 o C/W 40
Anachip Corp. www.anachip.com.tw 2/7
Rev.1.0 Jul 20, 2005
AP1128
3A Bus Terminator Regulator
Electrical Characteristics
VIN = +2.5V, VCNTL = +3.3V, VREFEN = +1.25V, COUT = 10uF (Ceramic)
Symbol VOS VIN VCNTL ICNTL ISHDN
Parameter Output Offset Voltage (Note 1)
VLOAD Load Regulation Input Voltage Range (DDR I/II) (Note2) Gate Drive Voltage Range (Note2) Operation Current of VCNTL Current in Shutdown
IQ Quiescent Current Short Circuit Protection ILIMIT Current Limit Over Temperature Protection TOS Thermal Shutdown Temperature Shutdown Function Shutdown Threshold Trigger Shutdown Threshold Trigger
Conditions IOUT=0A IL: 0A --> 1.5A IL: 0A --> -1.5A VCNTL VIN VCNTL VIN IOUT = 0A VREFEN < 0.2V, RL=180 IOUT=0A SOP-8 TO-252 3.3V VCNTL 5V Output = High Output = Low
Min. -20 1.6 0.8 -
Typ. -5 0.5 0.5 2.5/1.8 3.3 3 10 1 2 3 140 -
Max. 20 2 2 6 6 90 3 0.2
Unit mV % V V mA uA mA A
o
C
V
Note 1: VOS is the voltage measurement VOUT subtracted from VREFEN. Note 2: Keep VCNTL VIN at power on/off sequences. 2 Note 3: Surface mounted on 1 in copper pad of FR4 board
Typical Performance Characteristics
1.30 1.28
1.30 1.28
VOUT (V)
VOUT (V)
1.26 1.24 1.22 1.20 1.5 1.6 1.7
1.26 1.24 1.22 1.20
VIN (V)
1.9
2.1
2.3
2.5
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
VCNTL (V)
Fig 1. Line Regulation ( VIN v.s. VOUT )
5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Fig 2. Line Regulation ( VCNTL v.s. VOUT )
ICNTL (mA)
VCNTL (V)
Fig 3. Line Regulation ( VCNTL v.s. ICNTL )
Anachip Corp. www.anachip.com.tw 3/7 Rev.1.0 Jul 20, 2005
AP1128
3A Bus Terminator Regulator
Typical Performance Characteristics (Continued)
Fig 4. Output Short-Circuit Protection
Fig 5. Output Short-Circuit Protection
Output Transient Voltage
VREFER=1.25V 1.5A Output Current
-1.5A
VIN=2.5V, VCNTL=3.3V, VREFER=1.25V, Temp(IC Body) = 98oC Fig 7. Transient Response
Output Transient Voltage
VREFER=0.9V 1.5A Output Current
-1.5A
VIN=1.8V, VCNTL=3.3V, VREFER=0.9V Fig 8. Transient Response
Anachip Corp. www.anachip.com.tw 4/7 Rev.1.0 Jul 20, 2005
AP1128
3A Bus Terminator Regulator
Typical Performance Characteristics (Continued)
Fig 9. Safe Operating Area
Marking Information
( Top View )
(Top View) Logo Part Number
8 Logo
ID Code Xth Week: 01~52 Year: "01" = 2001 "02" = 2002
5
1128 XXXX X
Part No.
AP1128 YY WW X
1 4
ID code: internal Xth week: 01~52 Year: "01" =2001 "02" =2002
~
~
(TO252-5)
(SOP-8)
Anachip Corp. www.anachip.com.tw 5/7
Rev.1.0 Jul 20, 2005
AP1128
3A Bus Terminator Regulator
Package Information
(1) Package Type: TO252-5
A B 5.6 5.6
C
11.0
M
D
2.0
7.2 1.27 0.6 L
P(TYP.) S
G
Land Pattern Recommendation (Unit: mm)
K
Symbol A B C D P S G H J K L M
Dimensions In Millimeters Min. Nom. Max. 6.35 6.60 6.85 5.20 5.35 5.50 6.80 7.00 7.30 2.20 2.50 2.80 1.27 REF. 0.50 0.65 0.80 0.40 0.50 0.63 2.20 2.30 2.40 0.45 0.52 0.58 0.00 0.08 0.15 0.90 1.20 1.63 5.40 5.80 6.20
Dimensions In Inches Min. Nom. Max. 0.250 0.260 0.270 0.205 0.211 0.217 0.268 0.276 0.287 0.087 0.098 0.110 0.050 REF. 0.020 0.026 0.031 0.016 0.020 0.025 0.087 0.091 0.094 0.018 0.020 0.023 0.000 0.003 0.006 0.035 0.047 0.064 0.213 0.228 0.244
Anachip Corp. www.anachip.com.tw 6/7
J
H
Rev.1.0 Jul 20, 2005
AP1128
3A Bus Terminator Regulator
Package Information (Continued)
(2) Package Type: SOP-8
E
H
L VIEW "A"
D 7 (4X) A2 A
0.015x45
7 (4X)
A1
e
B y
C
VIEW "A"
Symbol A A1 A2 B C D E e H L y
Dimensions In Millimeters Min. Nom. Max. 1.40 1.60 1.75 0.10 0.25 1.30 1.45 1.50 0.33 0.41 0.51 0.19 0.20 0.25 4.80 5.05 5.30 3.70 3.90 4.10 1.27 5.79 5.99 6.20 0.38 0.71 1.27 0.10 0o 8o
Dimensions In Inches Min. Nom. Max. 0.055 0.063 0.069 0.040 0.100 0.051 0.057 0.059 0.013 0.016 0.020 0.0075 0.008 0.010 0.189 0.199 0.209 0.146 0.154 0.161 0.050 0.228 0.236 0.244 0.015 0.028 0.050 0.004 0o 8o
Anachip Corp. www.anachip.com.tw 7/7
Rev.1.0 Jul 20, 2005

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