XRP2997_12 Datasheet, PDF (2/8 Pages) Exar Corporation – 2A DDR I/II/III Bus Terminatio nRegulator

XRP2 99 7
2A DDR I / I I / I I I Bus Term inat ion Regulat or
ABSOLUTE MAXIMUM RAT INGS
These are stress ratings only and functional operation o
f
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
VIN , V REF, V CNTL ................................
.......... - 0. 3V to 6.0V
Junction Temperature Range .................. - 40°C to +1 50 °C
Storage Temperature ............................ - 65°C to + 150°C
Lead Temperature (Soldering, 10 sec) .................... 260 °C
OPERATING RATINGS
Operating Temperature Range .................
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7KHUPDO5HVJLC .V....W...D....Q...F....H.......LJ......
- 40°C to +85 °C
...... 60 °C/W
...... 16 °C/W
ELECTRICAL SPECIFICA TIONS
Specifications are for an Operating
Ambient Temperature of T A = 25°C only; limits applying over the full Operating Junction
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correlation. Typical values represent the most likely parametric norm at T
A = 25°C, and are provided for reference purposes
only. Unless otherwise indicated, V IN = 1.8V/ 1.5 V, VCNTL = 3.3 V, VREF = 0.5x VIN , COUT = 22 µF (ceramic) , T A= 25 °C.
Para meter
Min.
Typ.
Max.
Units
Conditions
VIN , Input Voltage Range
1. 1
1.8 /1. 5
5.5
V
VCNTL, Input Voltage Range
2.375
3.3
5.5
V
VOUT, Output Voltage
VREF
V
VOS, Output Voltage Offset
- 20
+20
mV
- 20
οVLOR, Load Regulation
- 20
+20
mV
+20
mV
I Q, Quiescent Current
2
90
µA
I CNTL, Operating Current of V CNTL
1
2.5
mA
I REF, Bias Current of V REF
0
1
µA
I IL , Current Limit
2. 4
3
A
RDSCHG, Output Discharge
Resistance
Thermal Protection
TSD, Thermal Shutdown
Temperature
Thermal Shutdown Hysteresis
Shutdown Specifications
18
25
Ÿ
160
°C
30
°C
0. 6
VTRIGGER, Shutdown Threshold
V
0.2
Keep V CNTL•9IN during power on and
power off sequences (note 4)
Keep V CNTL•9IN during power on and
power off sequences (not e 4)
I OUT = 0mA
I OUT = 0mA (note 1)
I OUT = 0.1mA to +2A
I OUT = 0.1mA to - 2A
VREF < 0.2V, V OUT = OFF
I OUT = 0mA
VREF = 1.25V
Source: V OUT=0.33xV REF
Sink: V OUT=0.95xV IN (n ote 3 )
VREF=0V, V OUT= 0.3V
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(note 4)
Guaranteed by design
Output ON
VREF = 0V Æ 1.25V
Output OFF
VREF = 1.25V Æ 0V
Note 1: VOS offset is the voltage measurement defined as V
OUT subtracted from V REF.
Note 2: Load regulation is measured at constant junction temperature, using pulse testing with a
Note 3: Current limit is measured by
applying a short duration current pulse .
Note 4: In order to safely operate your system, V
CNTL must be > V IN .
short ON time.
© 2012 Exar Corporation
2/ 8
Rev. 1.2.0