IRF IRU1206-18CD 1a very low dropout positive fixed and adjustable regulator Datasheet

Data Sheet No. PD94134
IRU1206 / IRU1207 / IRU1208 / IRU1209
1A VERY LOW DROPOUT POSITIVE
FIXED AND ADJUSTABLE REGULATORS
DESCRIPTION
FEATURES
Low Dropout Voltage (500mV at 1A)
1% Voltage Reference Accuracy
Low Ground Current
1mA Maximum Quiescent Current in Shutdown
(IRU1207, IRU1208)
Fast Transient Response
Current Limit and Thermal Shutdown
Error Flag Signal for Output out of Regulation
(IRU1207, IRU1208)
APPLICATIONS
2.5V Supply from 3.3V Input for the new
generation of Logic ICs
Computer Mother Board, Add-On Cards
High Efficiency Post Regulator in Switch Mode
Power Supply (SMPS)
The IRU1206 family of devices are ultra low dropout 1A
regulators using PNP transistor as the pass element.
These products are ideal when a single input supply is
only available and the dropout voltage is less than 1V,
exceeding the minimum dropout characteristics of NPN/
PNP hybrid regulators. One common application of these
regulators is where input is 3.3V and a 2.5V output is
needed.
Besides the low dropout of less than 0.5V, other features of the family of the parts are: micro-power shutdown capability and output UVLO detection where Flag
pin is switched low when output is below 5% of its nominal point.
TYPICAL APPLICATION
VOUT
3
VOUT
IRU1206XX Gnd 2
VIN
C2
1
VIN
C1
Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package.
PACKAGE ORDER INFORMATION
TJ (°C)
0 To 125
0 To 125
0 To 125
0 To 125
0 To 125
0 To 125
0 To 125
0 To 125
Rev. 2.3
08/02/02
2-PIN TO-252
3-PIN
(D-PAK)
SOT-223 (Y)
IRU1206-18CD IRU1206-18CY
IRU1206-25CD IRU1206-25CY
IRU1206-33CD IRU1206-33CY
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
8-PIN PLASTIC
SOIC (S)
NA
NA
NA
IRU1207-18CS
IRU1207-25CS
IRU1207-33CS
IRU1208CS
IRU1209CS
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VOLTAGE
PIN FUNCTIONS
1.8V
2.5V
3.3V
1.8V
2.5V
3.3V
Adj
Adj
VIN, VOUT, Gnd
VIN, VOUT, Gnd
VIN, VOUT, Gnd
VIN, VOUT, Gnd, Enable, Flag
VIN, VOUT, Gnd, Enable, Flag
VIN, VOUT, Gnd, Enable, Flag
VIN, VOUT, Gnd, Flag, Adj
VIN, VOUT, Gnd, Enable, Adj
1
IRU1206 / IRU1207 / IRU1208 / IRU1209
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V IN) .................................................... 12V
Enable Input Voltage ................................................ 12V
Storage Temperature Range ...................................... -65°C To 150°C
Operating Junction Temperature Range .....................
0°C To 135°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
IRU1206
3-PIN PLASTIC SOT-223 (Y)
IRU1206
FRONT VIEW
TOP VIEW
3
VOUT
Tab is
Gnd
1
Tab is
Gnd
θJA=70°C/W for
0.5" Sq pad
V IN
8-PIN PLASTIC SOIC (S)
IRU1208
IRU1207
VOUT
2
Gnd
1
VIN
θJA=90°C/W for
0.4" Sq pad
IRU1209
TOP VIEW
TOP VIEW
3
TOP VIEW
Enable
1
8
Gnd
Flag
1
8
Gnd
Enable
1
8
Gnd
VIN
2
7
Gnd
VIN
2
7
Gnd
VIN
2
7
Gnd
VOUT
3
6
Gnd
VOUT
3
6
Gnd
VOUT
3
6
Gnd
Flag
4
5
Gnd
Adj
4
5
Gnd
Adj
4
5
Gnd
θJA=55°C/W
for 1" Sq pad
θJA=55°C/W
for 1" Sq pad
θJA=55°C/W
for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=COUT=10mF, V IN=Vo+1V, VOUT=VFB (For adjustable
version only), and TA=25°C. Typical values refer to TA=25°C. Low duty cycle pulse testing is used which keeps
junction and case temperatures equal to the ambient temperature.
PARAMETER
Initial Voltage Accuracy
(see Table 1 for nominal values)
Line Regulation
Load Regulation (Note 1)
SYM
Vo
Output Voltage Temp Coef.
Dropout Voltage (Note 2)
DVO(T)
DVI(O) Io=100mA (Note 4)
Io=500mA (Note 4)
Io=1000mA (Note 4)
IQ
VIN=Vo + 1 for all conditions:
Io=100mA (Note 4)
Io=500mA (Note 4)
Io=1000mA (Note 4)
ICL
Vo=5% Below Regulation Point
VIN(min)
Ground Current (Note 3)
Current Limit
Minimum Input Voltage
IRU1208, IRU1209
Adjust Pin Current
Minimum Load Current
2
DVI
DVL
IADJ
TEST CONDITION
Io=10mA, TA=258C
(Note 4)
Vo + 1V<VIN<12
10mA<Io<1A
1mA<Io<150mA
MIN
-1
-1.3
0.5
0.5
20
100
300
500
1.1
1.4
2.1
2.3
0.1
1
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MAX
1
1.3
1
0.7
0.5
100
200
400
650
3
15
50
VIN=2.5V, Vo=VADJ (Note 4)
IO(min)
TYP
UNITS
%
%
%
ppm/8C
mV
mA
A
V
mA
mA
Rev. 2.3
08/02/02
IRU1206 / IRU1207 / IRU1208 / IRU1209
PARAMETER
IRU1207, IRU1209
Ground Current - SD Activated
Enable Pin Input LO Voltage
Enable Pin Input HI Voltage
Enable Pin Input LO Current
Enable Pin Input HI Current
IRU1207, IRU1208
Flag Output Threshold Voltage
Flag Output Hysteresis Voltage
Flag Output Saturation Voltage
SYM
IQ(SD)
VEN(L)
VEN(L)
TEST CONDITION
MIN
Enable=Open
Regulator OFF (Note 4)
Regulator ON (Note 4)
VEN(L) =0V to 0.8V (Note 4)
VEN(L) =2V to Vin (Note 4)
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.
MAX
UNITS
0.01
1
0.8
0.1
100
2
600
mA
V
V
mA
mA
2
VTH(FG)
VHYS Output Ramping Up
VF(SAT) Io=5mA
Io=500mA
Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data.
TYP
5
0.8
400
230
%VO
%VO
mV
Note 3: Ground current is the regulator quiescent current plus the pass transistor current. The total current
from the supply is the sum of the load current plus the
ground pin current.
Note 4: The specification applies for the junction temperature of 0 to +1258C.
PIN DESCRIPTIONS
PIN SYMBOL
VIN
(All devices)
PIN DESCRIPTION
The 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 drop out voltage
during the load transient response. This pin must always be 0.6V higher than VOUT in order
for the device to regulate properly.
VOUT
The output of the regulator. A minimum of 2.2mF capacitor must be connected from this pin
(All devices)
to ground.
Gnd
Ground pin. This pin must be connected to the lowest potential in the system and all other
(All devices)
pins must be at higher potential with respect to this pin.
Enable
Enable pin. A low signal or left open on this pin shuts down the output. This pin must be tied
(IRU1207, IRU1209) HI or to VIN for normal operation.
Flag
An open collector output that switches low when the output voltage drops about 4% below
(IRU1207, IRU1208) its expected regulated voltage.
Adj
A resistor divider from this pin to the VOUT pin and ground sets the output voltage.
(IRU1208, IRU1209)
APPLICATION INFORMATION
Part Number
Stability
The IRU120X series of regulators require the use of an
output capacitor as part of the frequency compensation
in order to make the regulator stable. A minimum of 2.2mF
capacitance and the ESR in the range of 0.5 to 2V insures the stability of the system.
IRU1206-18
IRU1206-25
IRU1206-33
IRU1207-18
IRU1207-25
IRU1207-33
IRU1208
IRU1209
Output
Voltage
1.8V
2.5V
3.3V
1.8V
2.5V
3.3V
1.24V
1.24V
Table 1 - Output voltage vs. part number.
Rev. 2.3
08/02/02
www.irf.com
3
IRU1206 / IRU1207 / IRU1208 / IRU1209
TYPICAL APPLICATION
VOUT
3
VOUT
IRU1206XX Gnd 2
VIN
C2
1
VIN
C1
Note: Tab must also be
connected to ground.
Figure 2 - Typical application of IRU1206.
Ref Desig
Description
Qty
Part #
Manuf
C1
Capacitor
1
10mF, Tantalum
AVX
C2
Capacitor
1
10mF, Tantalum
AVX
5
Gnd
Flag
4
Error Flag
6
Gnd
V OUT
3
VOUT
IRU1207
R1
7
Gnd
V IN
2
8
Gnd
Enable
1
SD
C2
Enable
VIN
C1
Figure 3 - Typical application of IRU1207.
4
Ref Desig
Description
Qty
Part #
C1
Capacitor
1
10mF, Tantalum
AVX
C2
Capacitor
1
10mF, Tantalum
AVX
R1
Resistor
1
10KV, 5%
Panasonic
www.irf.com
Manuf
Rev. 2.3
08/02/02
IRU1206 / IRU1207 / IRU1208 / IRU1209
TYPICAL APPLICATION
5
Gnd
Adj
4
6
Gnd
V OUT
3
VOUT
R1
IRU1208
7
Gnd
V IN
C2
2
R2
8
Gnd
Flag
R3
1
Error Flag
VIN
R1
Vo = 1.24 3 1 + R2
(
C1
)
Figure 4 - Typical application of IRU1208 in 3.3V to 2.5V regulator.
Rev. 2.3
08/02/02
Ref Desig
Description
Qty
Part #
C1
Capacitor
1
10mF, Tantalum
AVX
C2
Capacitor
1
10mF, Tantalum
AVX
R1
Resistor
1
127V, 1%
R2
Resistor
1
124V, 1%
R3
Resistor
1
10KV, 5%
www.irf.com
Manuf
5
IRU1206 / IRU1207 / IRU1208 / IRU1209
TYPICAL APPLICATION
5
Gnd
Adj
4
6
Gnd
V OUT
3
VOUT
R1
IRU1209
7
Gnd
VIN
C2
2
R2
8
Gnd
Enable
SD
1
Enable
R1
Vo = 1.24 3 1 + R2
(
VIN
C1
)
Figure 5 - Typical application of IRU1209 in 3.3V to 2.5V regulator.
6
Ref Desig
Description
Qty
Part #
C1
Capacitor
1
10mF, Tantalum
AVX
C2
Capacitor
1
10mF, Tantalum
AVX
R1
Resistor
1
127V, 1%
R2
Resistor
1
124V, 1%
www.irf.com
Manuf
Rev. 2.3
08/02/02
IRU1206 / IRU1207 / IRU1208 / IRU1209
CHARACTERISTICS
IRU1209 Line Regulation @ 5mA to 100mA
Vout
Percent Error
% Error
Vout
1.25
5.00%
1.245
4.50%
1.24
4.00%
1.235
3.50%
1.23
3.00%
1.225
2.50%
1.22
2.00%
1.215
1.50%
2V
3V
2.
5V
4V
3.
5V
4.
5V
5V
6V
5.
5V
7V
6.
5V
7.
5V
8V
9V
8.
5V
10
V
9.
5V
11
V
0.00%
10
.5
V
0.50%
1.2
12
V
1.00%
11
.5
V
1.21
1.205
Input Voltage
Figure 6
IRU1209 Maximum Output Current ~ 1.25A
while in the current limit mode.
IRU1209 Output Voltage in Yellow. A DC offset equal
to the output voltage is applied to improve resolution.
The output is regulating current in this mode.
Figure 7
Rev. 2.3
08/02/02
www.irf.com
5 Sep 2001
15:15:05
7
IRU1206 / IRU1207 / IRU1208 / IRU1209
CHARACTERISTICS
IRU1209 Voltage Drop-out Variation with Ambient Temperature
with various load currents
IRU1209 Vout Variation with Ambient Temperature
with Vin @ 3.5V and 12V
2.55
2.5
2.4
2.54
2.53
mA
2.3
2.2
2.52
2.1
2.0
1.9
100 mA
500 mA
2.51
3.5 V
1A
2.50
12V
2.49
1.8
1.7
2.48
1.6
1.5
2.47
-50
0
50
100
2.46
150
-50
Temperature ( 88C)
0
Figure 8
50
100
150
Figure 9
IRU1209 Ground Current Variation with Ambient Temperature
100
90
80
70
mA
60
50
40
30
20
10
0
-50
0
50
100
150
Ambient Temperature ( 88 C)
Figure 10
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. 2.3
08/02/02
IRU1206 / IRU1207 / IRU1208 / IRU1209
(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.
Rev. 2.3
08/02/02
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9
IRU1206 / IRU1207 / IRU1208 / IRU1209
(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.
10
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Rev. 2.3
08/02/02
IRU1206 / IRU1207 / IRU1208 / IRU1209
(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. 2.3
08/02/02
A
Q
C
A1
Q2
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11
IRU1206 / IRU1207 / IRU1208 / IRU1209
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
S
SOIC, Narrow Body
8
95
2500
Fig B
Y
SOT-223
3
80
2500
Fig C
1
1
1
1
1
1
Feed Direction
Figure B
Feed Direction
Figure A
1
1
1
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
12
www.irf.com
Rev. 2.3
08/02/02
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