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Advanced Power Electronics

AP1280AMP Datasheet Preview

AP1280AMP Datasheet

2A SINK/SOURCE BUS TERMINATION REGULATOR

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Advanced Power
Electronics Corp.
AP1280AMP
2A SINK/SOURCE BUS TERMINATION REGULATOR
FEATURES
Ideal for DDR-I, DDR-II and DDR-III VTT Applications
Sink and Source up to 2Amp
Integrated Power MOSFETs
Generates Termination Voltage for SSTL_2, SSTL_18,
HSTL, SCSI-2 and SCSI-3 Interfaces.
High Accuracy Output Voltage at Full-Load
Output Adjustment by Two External Resistors
Built-in Soft-start Function
Shutdown for Suspend to RAM (STR) Functionality
with High-Impedance Output
Current Limiting Protection
On-Chip Thermal Protection
Available in ESOP-8 (Exposed Pad) Packages
VIN and VCNTL Under Voltage Protection
RoHS Compliant and Halogen Free
APPLICATION
Desktop PCs, Notebooks, and Workstations
Graphics Card Memory Termination
Set Top Boxes, Digital TVs, Printers
Embedded Systems
Active Termination Buses
DDR-I, DDR-II and DDR-III Memory Systems
TYPICAL APPLICATION
.
DESCRIPTIOON
The AP1280AMP is a simple, cost-effective and
high-speed linear regulator designed to generate
termination voltage in double data rate (DDR) memory
system to comply with the JEDEC SSTL_2 and
SSTL_18 or other specific interfaces such as HSTL,
SCSI-2 and SCSI-3 etc. devices requirements. The
regulator is capable of actively sinking or sourcing up to
2A while regulating an output voltage to within 40mV.
The output termination voltage cab be tightly regulated
to track 1/2VDDQ by two external voltage divider resistors
or the desired output voltage can be pro-grammed by
externally forcing the REFEN pin voltage.
The AP1280AMP also incorporates a high-speed
differential amplifier to provide ultra-fast response in
line/load transient. Other features include extremely low
initial offset voltage, excellent load regulation, current
limiting in bi-directions and on-chip thermal shut-down
protection.Built-in softstart function avoids a
misoperation by inrush current.
The AP1280AMP are available in the ESOP-8
(Exposed Pad) surface mount packages.
VIN
CIN
Shutdown
VIN VCNTL
R1
AP1280AMP
REFEN
VOUT
R2 CSS
GND
VCNTL
CCNTL
VOUT
RTT
COUT
RDUMMY
Enable
R1 = R2 = 100 K, RTT = 50/ 33/ 25
COUT = 10uF ( + 100 uF under the worst case testing condition )
CSS = 1uF , CIN = 470 uF (Low ESR) , CCNTL = 47uF
Data and specifications subject to change without notice
1
20140418V4.3




Advanced Power Electronics

AP1280AMP Datasheet Preview

AP1280AMP Datasheet

2A SINK/SOURCE BUS TERMINATION REGULATOR

No Preview Available !

Advanced Power
Electronics Corp.
ABSOLUTE MAXIMUM RATINGS(Note1)
Input Voltage (VIN) ------------------------------------------
CNTL Pin Voltage (VCNTL) --------------------------------
Power Dissipation (PD) ------------------------------------
Storage Temperature Range (TST) ---------------------
Lead Temperature (Soldering, 10sec.) ---------------
Thermal Resistance from Junction to Case (Rthjc)
6V
6V
Internally Limited
-65 to +150°C
260°C
28°C/W
AP1280AMP
Note1 : Exceeding the absolute maximum rating may damage the device.
OPERATING RATING(Note2)
Input Voltage (VIN) ------------------------------------------ 2.5V to 1.1V +3%
CNTL Pin Voltage (VCNTL) -------------------------------- 5.5V or 3.3V +5%
Junction Temperature Range (TJ) --------------------- -40 to +125°C
Ambient Temperature Range (TA) --------------------- -40 to +85°C
Note2 : The device is not guaranteed to function outside its operating conditions.
ORDERING / PACKAGE INFORMATION
( Top View )
AP1280 AX
VIN 1
8 NC
Package Type
MP : ESOP-8
GND 2
REFEN 3
GND
7 NC
6 VCNTL
VOUT
4.
ESOP-8
5
Rthja = 75oC/W
NC
ELECTRICAL SPECIFICATIONS
(VIN=1.8V, VCNTL=3.3V, VREFEN=0.9V, COUT=10uF(Ceramic), TA =25oC, unless otherwise specified)
Parameter
SYM
TEST CONDITION
MIN TYP
Input
VCNTL Operation Current
Standby Current
VIN Shutdown Current
UVP Function
VCNTL UVP Rising Threshold
VCNTL UVP Hysteresis
VIN UVP Rising Threshold
VIN UVP Hysteresis
Output (DDR / DDRII / DDRIII)
ICNTL
ISTBY
IVIN
IOUT = 0A
VREFEN= 0V (Shutdown)
VREFEN= 0V (Shutdown)
VCOP
VCHYS
VIOP
VIHYS
VCNTL Rising
VIOP Rising
-1
-2
--
2.4 2.55
- 0.35
0.8 0.95
- 0.15
Output Offset Voltage(Note3)
Load Regulation(Note4)
ΔVOS
ΔVLoad
IOUT = 10mA
IOUT = -10mA
VIN=1.8V, VREFEN=0.9V, IOUT=+10mA ~ +2A
VIN=1.5V, VREFEN=0.75V, IOUT=+10mA ~ +2A
VIN=1.2V, VREFEN=0.6V, IOUT=+10mA ~ +2A
VIN=1.1V, VREFEN=0.55V, IOUT=+10mA ~ +1.8A
-20
-20
-20
-20
-20
-20
-
-
-
-
-
-
MAX UNITS
2.5 mA
5 uA
5 uA
2.7 V
-V
1.1 V
-V
20
20
20 mV
20
20
20
2



Part Number AP1280AMP
Description 2A SINK/SOURCE BUS TERMINATION REGULATOR
Maker Advanced Power Electronics
Total Page 7 Pages
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