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PDF ( 数据手册 , 数据表 ) DDR12-25D08-AJ

零件编号 DDR12-25D08-AJ
描述 DC-DC / Non-Isolated Memory
制造商 Emerson
LOGO Emerson LOGO 


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DDR12-25D08-AJ 数据手册, 描述, 功能
DDR12 Series
Dual output
DC-DC CONVERTERS Tracking Dual Output
High current dual-output power module for DDR memory
Single compact module provides 25 A @ 2.5 V for Vddq
supply and 8 A @ 1.25 V for Vtt termination
Tracking dual output voltages (1.25 V @ 8 A, 2.5 V @ 25 A)
Output voltage remote sense (only on Vddq)
Sink capability for logic terminations
Power good output signal
Overvoltage protection
Overcurrent protection
Remote ON/OFF
Available RoHS compliant
1
NEW Product
The dual output DDR12-25D08-AJ is specially designed to meet the power needs of
double data rate memory DIMMS and associated memory control logic. The Vtt
output tracks the Vddq output, while the Vtt output can sink current as required by
logic terminations. This converter offers typical efficiencies greater than 84% when
operated at 50% load or greater. This model features a wide input range as well as
trimmable output voltages. Remote sense on Vddq and remote ON/OFF facilities are
included as standard, and the converter is protected against over-current and over-
voltage conditions.
All specifications are typical at nominal input, full load at 25 °C unless otherwise stated
2 YEAR WARRANTY
SPECIFICATIONS
OUTPUT SPECIFICATIONS - Vddq
Voltage adjustability
2.32-2.75 Vdc
Output setpoint accuracy Using 1% trim resistors
±2.5%
Line regulation
Low line to high line
±0.1%
Load regulation
Minimum load to full load +0%/-1.0%
Cross regulation
±0.4%
Temperature Co-efficient
0.2 mV/ºC
Ripple and noise
(See Note 1)
5 Hz to 20 MHz
50 mV pk-pk
Transient response
(See Note 2)
4 A/100 µs
±3.0% deviation
Overshoot
Nominal output at turn-on 2.0% max.
Undershoot
150 mV max.
OUTPUT SPECIFICATIONS - Vtt
Tracking Accuracy
Measured at Converter Pins
(=Vddq/2 - Vtt)
12 mV
Ripple and noise
(See Note 1)
5 Hz to 20 MHz
30 mV pk-pk
Transient response
(See Note 2)
8 A/1 µs
±3.0% deviation
INPUT SPECIFICATIONS
Input voltage range
Nominal 12 V
Input current
Minimum load
Remote OFF
Input current (max.)
(See Note 3)
10.8-13.2 Vdc
400 mA
20 mA
9 A max. @ Io max.
and Vin = 10.8 Vdc
INPUT SPECIFICATIONS - Contd.
Input reflected ripple
(See Note 4)
100 mA (pk-pk)
Remote ON/OFF
Logic compatibility
ON
OFF
Open collector ref to -input
>2.0 Vdc
<0.8 Vdc
Start-up time
(See Note 5)
Power up
Remote ON/OFF
<20 ms
<20 ms
EMC CHARACTERISTICS
Electrostatic discharge EN61000-4-2, IEC801-2
Conducted immunity EN61000-4-2
GENERAL SPECIFICATIONS
Efficiency
Switching frequency
(Fixed)
Approvals and
standards
VVtdtd=q1=.225.5VV
Vddq
Vtt
(See Note 7)
Material flammability
Weight
MTBF
Telcordia SR-332
84% @ full load
300 kHz typ.
300 kHz typ.
IEC60950/EN60950
UL/cUL 1950/60950
UL94V-0
34 g (1.3 oz)
TBD hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating ambient,
temperature
Non-operating
0 °C to +80 °C
-40 °C to +125 °C
File Name: ddr12.pdf Rev: 04 Sept 2006












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