Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G952
Global Mixed-mode Technology Inc.
1.8V 1A Regulator
Features
Output current in excess of 1A
Output voltage accuracy
2%
Quiescent current, typically 480A
Internal short circuit current limit
Internal over temperature protection
Applications
PC motherboard
ADSL/Cable Modem
Set-Top-Box
LAN switch/Hub
Broad band access
General Description
The G952 positive 1.8V voltage regulator features
the ability to source 1A of output current. The typical
quiescent current is 0.48mA.
Familiar regulator features such as over tempera-
ture and over current protection circuits are pro-
vided to prevent it from being damaged by ab-
normal operating conditions.
Ordering Information
PIN OPTION
ORDER NUMBER
PACKAGE TYPE
1 2 3
G952T63U SOT223
GND
V
OUT
V
IN
* For other package types and pin options, please contact us at sales
@
gmt.com.tw
Order Number Identification
GXXX XX X X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE
PIN OPTION
PACKING
T3: TO 220
1
2
3
U & D: Tape & Reel Direction
T4: TO 252
1: V
OUT
GND
V
IN
T:
Tube
T5: TO 263
2: V
OUT
V
IN
GND
T6: SOT 223
3: GND
V
OUT
V
IN
4:
GND
V
IN
V
OUT
5:
V
IN
GND
V
OUT
6:
V
IN
V
OUT
GND
Typical Application Package Type
[Note 4] : Type of C
OUT
G952
C1
1F
IQ
V
IN
V
OUT
I
O
C
OUT
10F
G952
C1
1F
IQ
V
IN
V
OUT
I
O
C
OUT
10F
Top View
1
3
TO 220
2
Top View
1
2
3
SOT 223
Top View
1
2
3
TO252
263
Top View
1
3
TO 220
2
Top View
1
3
TO 220
2
Top View
1
2
3
SOT 223
Top View
Top View
1
2
3
SOT 223
Top View
1
2
3
TO252
263
Top View
1
2
3
TO252
263
Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G952
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
(Note 1)
Input Voltage....................................................7V
Power Dissipation Internally Limited .... (Note 2)
Maximum Junction Temperature.................... .....150C
Storage Temperature Range.........-65C
T
J
+150C
Lead Temperature, Time for Wave Soldering
SOT-223 Package....................................260C, 4s
Continuous Power Dissipation (T
A
= +25C).........0.8W
Operating Conditions
(Note 1)
Input Voltage.........................................2.7V~6.5V
Temperature Range........................0C
T
J
125C
Electrical Characteristics
V
IN
=3.3V, I
O
= 1A, C
IN
= 1F, C
OUT
=10F, All specifications apply for T
A
= T
J
= 25C. [Note 3]
PARAMETER CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage
10mA < I
O
<
1A
1.764 1.800 1.836 V
Line Regulation
3V < V
IN
< 6.5V, I
O
= 10mA
3
30
mV
Load Regulation
10mA < I
O
< 1A
30
50
mV
Output Impedance
200mA DC and 100mA AC, fo = 120Hz
80
m
Quiescent Current
V
IN
= 3.3V
480
A
Ripple Rejection
f
i
= 120Hz,V
ripple
=1V
P-P
,
Io = 100mA
53
dB
I
O
= 0A
880
I
O
= 100mA
895
I
O
= 500mA
950
Dropout Voltage
I
O
= 1A
1160
mV
V
IN
= 3V
Minimum footprint
(0.0625 square inch)
660 mA
Output Current
Continuous Test,
T
A
= 25C, T
J
<150C,
V
OUT
within
2%
V
IN
= 3.3V
Mounted on 0.53 square
inch pcb area
1 A
Short Circuit Current
1.6
A
Over Temperature
150
C
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating
Conditions are conditions under which the device functions but the specifications might not be guaranteed. For
guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, T
J
, the junc-
tion-to-ambient thermal resistance, R
JA
, and the ambient temperature, T
A
. Exceeding the maximum allow-
able power dissipation will cause excessive die temperature, and the regulator will go into thermal shut-
down. Maximum power dissipation can be calculated based on the output current and the voltage drop
across the pass. To determine the maximum power dissipation can use basic equation: P
D(max)
=T
J
(max)
-T
A
/
JA
= I
OUT
(V
IN
-V
OUT
) = 800mW. The safe operation of SOT-223 package by G952, it can see "Typical
Performance Characteristics". (Safe Operation Area)
Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as pos-
sible.
Note4: The type of output capacitor should be tantalum or aluminum.
Definitions
Dropout Voltage
The input/output Voltage differential at which the
regulator output no longer maintains regulation against
further reductions in input voltage. Measured when the
output drops 100mV below its nominal value. Dropout
voltage is affected by junction temperature, load cur-
rent and minimum input supply requirements.
Line Regulation
The change in output voltage for a change in input
voltage. The measurement is made under conditions
of low dissipation or by using pulse techniques such
that average chip temperature is not significantly af-
fected.
Load Regulation
The change in output voltage for a change in load
current at constant chip temperature. The measure-
ment is made under conditions of low dissipation or by
using pulse techniques such that average chip tem-
perature is not significantly affected.
Maximum Power Dissipation
The maximum total device dissipation for which the
regulator will operate within specifications.
Quiescent Bias Current
Current which is used to operate the regulator chip
and is not delivered to the load.
Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G952
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
= +3.3V, C
IN
=1F, C
OUT
=10F, T
A
=25C, unless otherwise noted.)
Line Transient
Ground Current vs. Load Current
Output Voltage vs. Load Current
Dropout Voltage vs. Load Current
Safe Operation Area of SOT-223
Line Transient
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
2.00
0
100
200
300
400
500
600
700
800
900
1000
Load Current (mA)
Ground Current (mA)
0
200
400
600
800
1000
1200
1400
1600
0
100
200
300
400
500
600
700
800
900
1000
Load Current (mA)
Dropout Voltage (mV)
1.700
1.720
1.740
1.760
1.780
1.800
1.820
1.840
1.860
1.880
1.900
0
100
200
300
400
500
600
700
800
900
1000
Load Current (mA)
Ootput Voltage (V)
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.2
1.7
2.2
2.7
3.2
3.7
4.2
4.7
Input-Output Voltage Differential (V)
Load Current (A)
Mounted on 0.53 square inch pcb
Mounted on 1 square inch pcb area
Recommend minimum footprint (0.0625 square inch)
T
A
= 25C
Still Air
Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G952
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
= +3.3V, C
IN
=1F, C
OUT
=10F, T
A
=25C, unless otherwise noted.)
R
JA
vs. Copper (1 ounce) Area for the SOT-223 Package
Load Transient
Load Transient
Load Transient
Load Transient
60
80
100
120
140
160
180
200
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Copper Area (Square Inches)
Thermal Resistance (R
JA
) C/W
Mounted on 1 oz Copper SOT-223
T
A
=25C
Still Air
Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G952
Global Mixed-mode Technology Inc.
Package Information
TO-220 (T3) Package
MILLIMETERS INCHES
SYMBOLS
MIN MAX MIN MAX
A 4.318 4.826 0.170 0.190
A1 2.46 2.72
0.097
0.107
b 0.69
0.94
0.027
0.037
b1 1.143 1.397 0.045 0.055
C 0.304 0.460 0.012 0.018
D 3.429 3.683 0.135 0.145
D1 8.53 9.04
0.336
0.356
d 2.62
2.87
0.103
0.113
E 9.906 10.40 0.390 0.410
E1 2.84 5.13
0.112
0.202
e 2.29
2.79
0.090
0.110
e1 4.83 5.33
0.190
0.210
F 1.143 1.397 0.045 0.055
I 3.454 3.962 0.136 0.156
L 13.589
14.351
0.535
0.565
E
R
E1
E1
D
d
I
L
e
b
b1
e1
A
F
D1
C
A1
Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
6
G952
Global Mixed-mode Technology Inc.
TO-252 (T4) Package
Notes:
1. Dimensioning and tolerancing per ansi y14.5m, 1982.
2. Controlling dimension: inch
INCHES MILLIMETERS
DIM
MIN MAX MIN MAX
A 0.235
0.250
5.97 6.35
B 0.250
0.265
6.35 6.73
C 0.086
0.094
2.19 2.38
D 0.027
0.035
0.69 0.88
E 0.033
0.040
0.84 1.01
F 0.037
0.047
0.94 1.19
G 0.180BSC
4.58BSC
H 0.034
0.040
0.87 1.01
J 0.018
0.023
0.46 0.58
K 0.102
0.114
2.60 2.89
L 0.090BSC
2.29BSC
R 0.175
0.215
4.45 6.46
S 0.020
0.050
0.51 1.27
U 0.020 --- 0.51 ---
V 0.030
0.050
0.77 1.27
Z 0.138 --- 3.51 ---
R
B
V
A
K
S
1
2
3
F
L
D
G
4
2 PL
0.13 (0.005) M T
Z
E
C
T
SEATING
PLANE
U
J
H
Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
7
G952
Global Mixed-mode Technology Inc.
TO-263 (T5) Package
MILLIMETERS INCHES
SYMBOLS
MIN MAX MIN MAX
A 4.30
4.70
0.169
0.185
A1 1.22 1.32
0.048
0.055
A2 2.45 2.69
0.104
0.106
b 0.69
0.94
0.027
0.037
b1 1.22 1.40
0.048
0.055
C 0.36
0.56
0.014
0.022
D 8.64
9.652
0.340
0.380
E 9.70
10.54
0.382
0.415
e 2.29
2.79
0.090
0.110
e1 4.83 5.33
0.190
0.210
H 14.60 15.78 0.575 0.625
L 4.70
5.84
0.185
0.230
L1 1.20
1.778
0.047
0.070
L2 2.24 2.84
0.088
0.111
L3 1.40MAX
0.055MAX
e
L3
D
H
e1
b1
b
E
A
A1
C
A2
L2
L
L1
e
L3
D
H
e1
b1
b
E
A
A1
C
A2
L2
L
L1
Ver: 0.1 Preliminary
Oct 29, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
8
G952
Global Mixed-mode Technology Inc.
SOT-223 (T6) Package
MILLIMETERS INCHES
SYMBOLS
MIN MAX MIN MAX
A 1.55
1.80
0.061
0.071
A1 0.02 0.12
0.0008
0.0047
B 0.60
0.80
0.024
0.031
B1 2.90 3.10
0.114
0.122
C 0.24
0.32
0.009
0.013
D 6.30
6.70
0.248
0.264
E 3.30
3.70
0.130
0.146
e
2.30 BSC
0.090 BSC
e1
4.60 BSC
0.181 BSC
H 6.70
7.30
0.264
0.287
L
0.90 MIN
0.036 MIN
L2
0.06 BSC
0.0024 BSC
0 10 0 10
Package Orientation
A
B
13
(4X)
A1
e1
e
E
B1
D
H
C
13
(4X)
L2
L
Feed Direction
SOT 223 Package Orientation
Feed Direction
TO 220 Package Orientation
Feed Direction
TO252
263 Package Orientation
Feed Direction
SOT 223 Package Orientation
Feed Direction
TO 220 Package Orientation
Feed Direction
TO252
263 Package Orientation
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