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Электронный компонент: G2995

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Ver: 1.7
May 10, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G2995
Global Mixed-mode Technology Inc.
DDR Termination Regulator
Features
Operation Supply Voltage: 1.6V to 5.5V
Low Supply Current: 280A @ 2.5V
Low Output Offset
Source and Sink Current
Low External Component Count
No Inductor Required
No external Resistors Required
Thermal Shutdown Protection
SOP-8L with Power-Pad package
Applications
DDR-SDRAM Termination Voltage
DDR-I / DDR-II Termination Voltage
SSTL-2
SSTL-3
General Description
The G2995 is a linear regulator designed to meet the
JEDEC SSTL-2 and SSTL-3 (Series Stub Termination
Logic) specifications for termination of DDR-SDRAM.
It contains a high-speed operational amplifier that pro-
vides excellent response to the load transients. This
device can deliver 1.5A continuous current and tran-
sient peaks up to 3A in the application as required for
DDR-SDRAM termination. With an independent V
SENSE
pin, the G2995 can provide superior load regulation.
The G2995 provides a V
REF
output as the reference for
the applications of the chipset and DIMMs.
The G2995 can easily provide the accurate V
TT
and
V
REF
voltages without external resistors that PCB ar-
eas can be reduced. The quiescent current is as low
as 280A @ 2.5V. So the power consumption can
meet the low power consumption applications.
Ordering Information
ORDER
NUMBER
ORDER NUMBER
(Pb free)
MARKING
TEMP.
RANGE
PACKAGE
G2995P1U
G2995P1Uf
G2995
-40C to 85C
SOP-8
G2995F1U
G2995F1Uf
G2995
-40C to 85C
SOP-8 (FD)
Note: P1:SOP-8 F1:SOP-8(FD)
U: Tape & Reel (FD): Thermal Pad
Pin Configuration
Typical Application Circuit


VSENSE
8
6
5
1
2
3
4
GND
VTT
PVIN
AVIN
VDDQ
SOP-8
G2995
7
VREF
Thermal
Pad
+
+
+
V
REF
V
DDQ
AV
IN
V
SENSE
PV
IN
V
TT
GND
V
TT
=1.25V
V
REF
=1.25V
V
DDQ
=2.5V
V
DD
=2.5V
47F
220F
0.01F
NC
VSENSE
8
6
5
1
2
3
4
GND
VTT
PVIN
AVIN
VDDQ
SOP-8
G2995
7
VREF
Thermal
Pad
+
+
+
V
REF
V
DDQ
AV
IN
V
SENSE
PV
IN
V
TT
GND
V
TT
=1.25V
V
REF
=1.25V
V
DDQ
=2.5V
V
DD
=2.5V
47F
220F
0.01F
NC
Ver: 1.7
May 10, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G2995
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
(1)
Supply Voltage
PVIN, AVIN, VDDQ to GND...............-0.3V to +6V
Operating Ambient Temperature Range
T
A
..................................................-40C to +125C
Maximum Junction Temperature, T
J
...................150C
Storage Temperature Range, T
STG
........-65C to+150C
Reflow Temperature (Soldering, 10 sec)............260C
Electrostatic Discharge, V
ESD
Human body mode......................................2000V
(2)
SOP-8L Thermal Resistance (
JA
)................130C/W
SOP-8L (FD) Thermal Resistance (
JA
).........50C/W
(3)
SOP-8L (FD) Thermal Resistance (
JA
).........41C/W
(4)
SOP-8L (FD) Thermal Resistance (
Jc
)..........12C/W
Recommend Operation Range
Operating Ambient Temperature Range
T
A
...................................................-40C to +85C
AVIN to GND......................................1.6V to +5.5V
PVIN, VDDQ to GND............................1.6V to AVIN
Note:
(1)
:Absolute maximum rating indicates limits beyond which damage to the device may occurs.
(2)
: Human body model : C = 100pF, R = 1500
, 3 positive pulses plus 3 negative pulses
(3)
: The package is placed on a 2-layer PCB (2oz/2oz) with 6 vias.
(4)
: The package is placed on a 2-layer PCB (2oz/2oz) with 6 vias. The airflow is used.
Electrical
Characteristics
Specifications with standard typeface are for T
A
=25
C. Unless otherwise specified, AVIN=PVIN=2.5V, VDDQ=2.5V
PARAMETER SYMBOL
CONDITION MIN
TYP
MAX
UNIT
V
REF
Voltage
V
REF
VDDQ=2.3V
VDDQ=2.5V
VDDQ=2.7V
1.11
1.21
1.31
1.145
1.245
1.345
1.19
1.29
1.39
V
V
V
V
REF
Output impendence
Z
REF
I
REF
=-30A to + 30A
---
1.15
---
k
V
TT
Output voltage
V
TT
I
OUT
=0A
VDDQ=2.3V
VDDQ=2.5V
VDDQ=2.7V
I
OUT
=
1.5A
VDDQ=2.3V
VDDQ=2.5V
VDDQ=2.7V
1.11
1.21
1.31
1.11
1.21
1.31
1.152
1.252
1.352
1.152
1.252
1.352
1.19
1.29
1.39
1.19
1.29
1.39
V
V
V
V
V
V
V
TT
Output Voltage Offset (V
REF-
V
TT
)
V
os
Vtt
I
OUT
=0A
I
OUT
=-1.5A
I
OUT
=+1.5A
-40
-40
-40
0
0
0
40
40
40
mV
mV
mV
Quiescent Current
I
Q
I
OUT
=0A ---
280
500
A
VDDQ input Impedence
Z
VDDQ
---
100
---
K
V
SENSE
input current
I
SENSE
--- 20 --- nA
Thermal Shutdown
T
SD
--- 150 ---
C
Thermal Shutdown Hystersis
T
Hsy
--- 25 ---
C
Ver: 1.7
May 10, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G2995
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
AV
IN
=2.5V, P
VIN
=2.5V, V
DDQ
=2.5V, C
AVIN
=0.1F, C
PVIN
=47F, C
VREF
=0.01F, C
VTT
=220F, T
A
=25
C, unless other-
wise noted.

I
Q
vs AV
IN
150
170
190
210
230
250
270
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
I
Q
(A)
V
REF
vs I
REF
1.18
1.2
1.22
1.24
1.26
1.28
1.3
-30
-20
-10
0
10
20
30
I
REF
(A)
V
REF
(V)
V
REF
vs V
DDQ
0
0.5
1
1.5
2
2.5
3
2
2.5
3
3.5
4
4.5
5
5.5
V
DDQ
(V)
V
REF
(V)
V
TT
vs I
OUT
Temperature
1.232
1.236
1.24
1.244
1.248
1.252
-100
-75
-50
-25
0
25
50
75
100
I
OUT
(mA)
V
TT
(V)
25C
85C
0C
Ver: 1.7
May 10, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G2995
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
AV
IN
=2.5V, P
VIN
=2.5V, V
DDQ
=2.5V, C
AVIN
=0.1F, C
PVIN
=47F, C
VREF
=0.01F, C
VTT
=220F, T
A
=25
C, unless other-
wise noted.
V
TT
vs V
DDQ
0
0.5
1
1.5
2
2.5
3
2
2.5
3
3.5
4
4.5
5
5.5
V
DDQ
(V)
V
TT
(V
)
I
Q
vs AV
IN
Temperature
150
170
190
210
230
250
270
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
I
Q
(A
)
0C
85C
25C
Maximum Sourcing Current vs AV
IN
(V
DDQ
=2.5V, PV
IN
=1.8V)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
OUTP
UT CURRE
NT(A
)
Maximum Sourcing Current vs AV
IN
(V
DDQ
=2.5V, PV
IN
=3.3V)
2
2.2
2.4
2.6
2.8
3
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
OUTP
UT CURRE
NT(A
)
Maximum Sourcing Current vs AV
IN
(V
DDQ
=2.5V, PV
IN
=2.5V)
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
OUTP
UT CURRE
NT(A
)
Ver: 1.7
May 10, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G2995
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
AV
IN
=2.5V, P
VIN
=2.5V, V
DDQ
=2.5V, C
AVIN
=0.1F, C
PVIN
=47F, C
VREF
=0.01F, C
VTT
=220F, T
A
=25
C, unless other-
wise noted.

I
O
=200m
Maximum Sinking Current vs AV
IN
(V
DDQ
=2.5V)
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
OUTPUT CURRENT(A)
Maximum Sourcing Current vs AV
IN
(V
DDQ
=1.8V, PV
IN
=1.8V)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
OUTPUT CURRENT(A)
Maximum Sinking Current vs AV
IN
(V
DDQ
=1.8V)
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
OUTPUT CURRENT(A)
Maximum Sourcing Current vs AV
IN
(V
DDQ
=1.8V, PV
IN
=3.3V)
2
2.2
2.4
2.6
2.8
3
2
2.5
3
3.5
4
4.5
5
5.5
AV
IN
(V)
OUTPUT CURRENT(A)
VOS
VTT
vs Temperature(V
DDQ
=2.5V)
-30
-20
-10
0
10
20
30
0
25
50
75
100
125
Temperature(
)
VOS
VTT
(mV
)
Sourcing 1.5A
No Load
Sinking 1.5A