IRF IRU1117-25CP

Data Sheet No. PD94141
IRU1117-25
800mA LOW DROPOUT POSITIVE
FIXED 2.5V REGULATOR
DESCRIPTION
FEATURES
Guaranteed < 1.2V Dropout at 800mALoad
Current
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-In Thermal Shutdown
Available in SOT-223, D-Pak, Ultra Thin-Pak TM
and 8-Pin SOIC Surface-Mount Packages
The IRU1117-25 is a low dropout three-terminal fixed output regulator with minimum of 800mA output current capability. This product is specifically designed to provide
well regulated supply for low voltage IC applications as
well as generating clock supply for PC applications. The
IRU1117-25 is guaranteed to have <1.2V dropout at full
load current making it ideal to provide well regulated with
3.8V input supply. The IRU1117-25 is specifically designed to be stable with low cost aluminum capacitors
while maintaining stability with low ESR tantalum caps.
APPLICATIONS
Low Voltage IC Supply Applications
PC Clock Supply Voltage
TYPICAL APPLICATION
5V
C1
10uF
VI N
3
IRU1117-25
VO U T
2
2.5V / 800mA
C2
10uF
Gnd
1
Figure 1 - Typical application of IRU1117-25 in a 5V to 2.5V regulator.
PACKAGE ORDER INFORMATION
TJ (°C)
0 To 150
Rev. 1.5
02/04/03
2-PIN PLASTIC
TO-252 (D-Pak)
IRU1117-25CD
2-PIN PLASTIC
Ultra Thin-PakTM (P)
IRU1117-25CP
www.irf.com
8-PIN PLASTIC
SOIC (S)
IRU1117-25CS
3-PIN PLASTIC
SOT-223 (Y)
IRU1117-25CY
1
IRU1117-25
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V IN) ....................................................
Power Dissipation .....................................................
Storage Temperature Range ......................................
Operating Junction Temperature Range .....................
7V
Internally Limited
-65°C To 150°C
0°C To 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
3
2-PIN ULTRA THIN-PAKTM (P)
3
VIN
8-PIN PLASTIC SOIC (S)
VIN
VIN
1
8
VOUT
NC
2
7
VOUT
NC
3
6
VOUT
Gnd
4
5
VOUT
Tab is
VOUT
Tab is
VOUT
1
1
Gnd
θJA=70°C/W for 0.5" Sq pad
Gnd
θJA=70°C/W for 0.5" Sq pad
3-PIN PLASTIC SOT-223 (Y)
Tab is
VOUT
θJA=55°C/W for 1" Sq pad
3
VIN
2
VOUT
1
Gnd
θJA=90°C/W for 0.4" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=1mF, VIN=5V, COUT=10mF, and TJ=0 to 1258C.
Typical values refer to TJ=258C.
PARAMETER
Output Voltage
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
Current Limit
Thermal Regulation
Ripple Rejection
Temperature Stability
Long Term Stability
RMS Output Noise
SYM
VO
TEST CONDITION
Io=10mA, TJ=258C
Io=10mA
Io=10mA, 4.75V<VIN<7V
10mA<Io<800mA
Io=1A
Io=800mA
DVo=100mV
30ms Pulse, Io=800mA
f=120Hz, Co=25mF Tantalum,
Io=0.5A
Io=10mA
TJ=1258C, 1000Hrs
TJ=258C, 10Hz<f<10KHz
MIN
2.475
2.450
TYP
2.500
2.500
1.2
1.1
MAX
2.525
2.550
7
17
1.3
1.2
0.01
0.02
1.1
70
0.5
0.3
0.003
1
UNITS
V
mV
mV
V
A
%/W
dB
%
%
%VO
Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data.
Note 2: Dropout voltage is defined as the minimum differential voltage between VIN and VOUT required to maintain
regulation at VOUT. It is measured when the output voltage drops 1% below its nominal value.
2
www.irf.com
Rev. 1.5
02/04/03
IRU1117-25
PIN DESCRIPTIONS
PIN#
1
PIN SYMBOL
Gnd
PIN DESCRIPTION
2
VOUT
The output of the regulator. This pin is also connected to the tab of the package. An output
capacitor must be connected to this pin to insure stability of the regulator.
3
VIN
Input pin of the regulator. Typically a large storage capacitor is connected from this pin to
ground to insure that the input voltage does not sag below the minimum dropout voltage
during the load transient response. This pin must always be 1.3V higher than V OUT in order
for the device to regulate properly.
Ground pin. This pin must be connected to ground plane using a low inductance short
connection.
BLOCK DIAGRAM
VIN 3
2 VOUT
+
1.25V
+
CURRENT
LIMIT
THERMAL
SHUTDOWN
1 Gnd
Figure 2 - Simplified block diagram of the IRU1117-25.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information
Data and specifications subject to change without notice. 02/01
Rev. 1.5
02/04/03
www.irf.com
3
IRU1117-25
(D) TO-252 Package
2-Pin
K
A
C
B
L
M
78
458
D
J
N
E
O
P
Q
R
G
F
S
H
R1
SYMBOL MIN
MAX
A
6.477 6.731
B
5.004 5.207
C
0.686 0.838
D
7.417 8.179
E
9.703 10.084
F
0.635 0.889
2.286 BSC
G
H
4.521 4.623
J
&1.52 &1.62
K
2.184 2.388
L
0.762 0.864
M
1.016
1.118
N
5.969 6.223
O
1.016
1.118
P
0
0.102
Q
0.534 0.686
R
R0.31 TYP
R1
R0.51 TYP
S
0.428 0.588
C
L
NOTE: ALL MEASUREMENTS
ARE IN MILLIMETERS.
4
www.irf.com
Rev. 1.5
02/04/03
IRU1117-25
(P) Ultra Thin-PakTM
2-Pin
A
A1
E
U
K
V
B
H
M
L
P
G
D
G1
N
C
R
C
L
SYMBOL
A
A1
B
C
D
E
G
G1
H
K
L
M
N
P
R
U
V
MIN
MAX
5.91
6.17
5.54
5.79
6.02
6.27
1.70
2.03
0.63
0.79
0.17
0.33
2.16
2.41
4.45
4.70
9.42
9.68
0.76
1.27
0.02
0.13
0.89
1.14
0.25
0.25
0.94
1.19
28
68
2.92
3.30
5.08 NOM
NOTE: ALL MEASUREMENTS
ARE IN MILLIMETERS.
Rev. 1.5
02/04/03
www.irf.com
5
IRU1117-25
(S) SOIC Package
8-Pin Surface Mount, Narrow Body
H
A
B
C
E
DETAIL-A
PIN NO. 1
L
D
DETAIL-A
0.386 0.015 x 458
T
K
I
F
J
G
8-PIN
SYMBOL
A
B
C
D
E
F
G
H
I
J
K
L
T
MIN
MAX
4.80
4.98
1.27 BSC
0.53 REF
0.36
0.46
3.81
3.99
1.52
1.72
0.10
0.25
78 BSC
0.19
0.25
5.80
6.20
08
88
0.41
1.27
1.37
1.57
NOTE: ALL MEASUREMENTS
ARE IN MILLIMETERS.
6
www.irf.com
Rev. 1.5
02/04/03
IRU1117-25
(Y) SOT-223 Package
3-Pin
SYMBOL
A
A1
B
B1
C
D
E
e
e1
H
Q
Q1
Q2
S
T
D
B
E
e
H
S
MIN
1.498
0.02
2.895
0.637
0.239
6.299
3.30
2.209
4.496
6.70
08
78
78
0.838
1.092
MAX
1.702
0.11
3.15
0.85
0.381
6.706
3.708
2.953
4.699
7.30
108
168
168
1.05
1.30
NOTE: ALL MEASUREMENTS
ARE IN MILLIMETERS.
e1
Q1
T
B1
Rev. 1.5
02/04/03
A
Q
C
A1
Q2
www.irf.com
7
IRU1117-25
PACKAGE SHIPMENT METHOD
PKG
DESIG
PACKAGE
DESCRIPTION
PIN
COUNT
PARTS
PER TUBE
PARTS
PER REEL
T&R
Orientation
D
TO-252, (D-Pak)
2
75
2500
Fig A
P
Ultra Thin-Pak
TM
2
75
2500
Fig B
S
SOIC, Narrow Body
8
95
2500
Fig C
Y
SOT-223
3
80
2500
Fig D
1
1
1
1
Feed Direction
Figure A
1
1
1
1
Feed Direction
Figure B
1
1
1
1
Feed Direction
Figure D
Feed Direction
Figure C
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information
Data and specifications subject to change without notice. 02/01
8
www.irf.com
Rev. 1.5
02/04/03