IRU1206-18CY

Data Sheet No. PD94134 revB
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
1A VERY LOW DROPOUT POSITIVE
FIXED AND ADJUSTABLE REGULATORS
FEATURES
DESCRIPTION
Low Dropout Voltage (500mV at 1A)
1% Voltage Reference Accuracy
Low Ground Current
1µA 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)
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.
APPLICATIONS
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.
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)
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.
Basic Part (Non Lead-Free)
TJ (°C)
2-Pin TO-252
3-Pin
(D-PAK)
SOT-223 (Y)
Lead-Free
8-Pin Plastic
SOIC (S)
VOLTs
Pin Functions
0 To 125 IRU1206-18CD IRU1206-18CY
NA
NA
1.8V VIN, VOUT, Gnd
0 To 125 IRU1206-25CD IRU1206-25CY
NA
NA
2.5V VIN, VOUT, Gnd
0 To 125 IRU1206-33CD IRU1206-33CY
NA
NA
3.3V VIN, VOUT, Gnd
0 To 125
NA
NA
IRU1207-18CS IRU1207-18CSPbF 1.8V VIN, VOUT, Gnd, Enable, Flag
0 To 125
NA
NA
IRU1207-25CS IRU1207-25CSPbF 2.5V VIN, VOUT, Gnd, Enable, Flag
0 To 125
NA
NA
IRU1207-33CS IRU1207-33CSPbF 3.3V VIN, VOUT, Gnd, Enable, Flag
0 To 125
NA
NA
IRU1208CS
IRU1208CSPbF
Adj VIN, VOUT, Gnd, Flag, Adj
0 To 125
NA
NA
IRU1209CS
IRU1209CSPbF
Adj VIN, VOUT, Gnd, Enable, Adj
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1
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN) .................................................... 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
θJA=70°C/W for
0.5" Sq pad
VIN
8-PIN PLASTIC SOIC (S)
IRU1208
IRU1207
1
8
2
7
3
6
4
5
Gnd
Gnd
Gnd
Gnd
θJA=55°C/W
for 1" Sq pad
Flag
VIN
VOUT
Adj
1
8
2
7
3
6
4
5
Gnd
Gnd
Gnd
Gnd
θJA=55°C/W
for 1" Sq pad
3
VOUT
2
Gnd
1
VIN
θJA=90°C/W for
0.4" Sq pad
IRU1209
TOP VIEW
TOP VIEW
TOP VIEW
Enable
VIN
VOUT
Flag
Tab is
Gnd
Enable
VIN
VOUT
Adj
1
8
2
7
3
6
4
5
Gnd
Gnd
Gnd
Gnd
θJA=55°C/W
for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over CIN=COUT=10µF, VIN=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)
∆VO(T)
∆VI(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
∆VI
∆VL
IADJ
IO(min)
TEST CONDITION
Io=10mA, TA=25 C
(Note 4)
Vo + 1V<VIN<12
10mA<Io<1A
1mA<Io<150mA
MIN
-1
-1.3
0.5
0.5
20
100
300
500
MAX
1
1.3
1
0.7
0.5
100
200
400
650
3
15
50
1.1
VIN=2.5V, Vo=VADJ (Note 4)
1.4
2.1
2.3
0.1
1
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TYP
UNITS
%
%
%
ppm/ C
mV
mA
A
V
µA
mA
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
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
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)
MIN
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
µA
V
V
µA
µA
2
VTH(FG)
VHYS Output Ramping Up
VF(SAT) Io=5mA
Io=500µA
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 +125 C.
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 2.2µF 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 2.2µF
capacitance and the ESR in the range of 0.5 to 2Ω 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.
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IRU1206/IRU1207/IRU1208/IRU1209(PbF)
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
C1
C2
Description
Capacitor
Capacitor
5 Gnd
Qty
1
1
Part #
10µF, Tantalum
10µF, Tantalum
Manuf
AVX
AVX
Flag
4
Error Flag
VOUT
3
VOUT
7 Gnd
VIN
2
8 Gnd
Enable
1
6 Gnd
IRU1207
R1
C2
SD Enable
VIN
C1
Figure 3 - Typical application of IRU1207.
Ref Desig
C1
C2
R1
4
Description
Capacitor
Capacitor
Resistor
Qty
1
1
1
Part #
10µF, Tantalum
10µF, Tantalum
10KΩ, 5%
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Manuf
AVX
AVX
Panasonic
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
TYPICAL APPLICATION
5
Gnd
Adj
4
6
Gnd
VOUT
3
7
Gnd
VIN
2
8
IRU1208
Gnd
Flag
VOUT
R1
C2
R2
R3
1
Error Flag
VIN
(
C1
Vo = 1.24 × 1 +
R1
R2
)
Figure 4 - Typical application of IRU1208 in 3.3V to 2.5V regulator.
Ref Desig
C1
C2
R1
R2
R3
Description
Capacitor
Capacitor
Resistor
Resistor
Resistor
Qty
1
1
1
1
1
Part #
10µF, Tantalum
10µF, Tantalum
127Ω, 1%
124Ω, 1%
10KΩ, 5%
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Manuf
AVX
AVX
5
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
TYPICAL APPLICATION
5
Gnd
Adj
4
6
Gnd
VOUT
3
7
Gnd
VIN
2
IRU1209
VOUT
R1
C2
R2
8
Enable
Gnd
SD
1
Enable
(
VIN
Vo = 1.24 × 1 +
C1
R1
R2
)
Figure 5 - Typical application of IRU1209 in 3.3V to 2.5V regulator.
Ref Desig
C1
C2
R1
R2
6
Description
Capacitor
Capacitor
Resistor
Resistor
Qty
1
1
1
1
Part #
10µF, Tantalum
10µF, Tantalum
127Ω, 1%
124Ω, 1%
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Manuf
AVX
AVX
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
CHARACTERISTICS
IRU1209 Line Regulation @ 5mA to 100mA
Vout
Percent Error
% Error
Vout
1.25
5.00%
1.245
4.50%
2V
3V
2.
5V
4V
3.
5V
4.
5V
5V
6V
10
.5
10
11
.5
12
11
5.
5V
0.00%
7V
1.2
6.
5V
0.50%
7.
5V
1.00%
1.205
8V
1.50%
1.21
9V
1.215
8.
5V
2.00%
V
2.50%
1.22
9.
5V
1.225
V
3.00%
V
3.50%
1.23
V
4.00%
V
1.24
1.235
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
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5 Sep 2001
15:15:05
7
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
CHARACTERISTICS
IRU1209 Voltage Drop-out Variation w ith Am bient Tem perature
w ith various load currents
IRU1209 Vout Variation w ith Ambient Tem perature
w ith Vin @ 3.5V and 12V
2.55
2.5
2.54
2.4
2.53
2.3
mA
2.2
2.52
2.1
100 mA
2.0
500 mA
1A
1.9
2.51
3.5 V
2.50
12V
1.8
2.49
1.7
2.48
1.6
2.47
1.5
-50
0
50
100
2.46
150
-50
Tem pe ra ture ( C)
0
Figure 8
50
Figure 9
IRU1209 Ground Current Variation with Ambient Temperature
100
90
80
70
mA
60
50
40
30
20
10
0
-50
0
50
Ambie nt Tem pe ra ture ( C)
Figure 10
8
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100
150
100
150
IRU1206/IRU1207/IRU1208/IRU1209(PbF)
(D) TO-252 Package
2-Pin
K
A
B
C
L
M
7
45
D
J
N
E
O
P
Q
R
G
F
S
H
R1
SYMBOL
A
B
C
D
E
F
G
H
J
K
L
M
N
O
P
Q
R
R1
S
CL
MIN
6.477
5.004
0.686
7.417
9.703
0.635
2.286
MAX
6.731
5.207
0.838
8.179
10.084
0.889
BSC
4.521 4.623
∅1.52 ∅1.62
2.184 2.388
0.762 0.864
1.016 1.118
5.969 6.223
1.016 1.118
0.102
0
0.534 0.686
R0.31 TYP
R0.51 TYP
0.428 0.588
NOTE: ALL MEASUREMENTS
ARE IN MILLIMETERS.
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IRU1206/IRU1207/IRU1208/IRU1209(PbF)
(S) SOIC Package
8-Pin Surface Mount, Narrow Body
H
A
B
C
E
DETAIL-A
PIN NO. 1
L
D
DETAIL-A
0.38± 0.015 x 45
K
T F
I
J
G
8-PIN
SYMBOL
A
B
C
D
E
F
G
H
I
J
K
L
T
MAX
MIN
4.98
4.80
1.27 BSC
0.53 REF
0.46
0.36
3.99
3.81
1.72
1.52
0.25
0.10
7 BSC
0.19
5.80
0
0.41
1.37
0.25
6.20
8
1.27
1.57
NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS.
10
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IRU1206/IRU1207/IRU1208/IRU1209(PbF)
(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
0
7
7
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
10
16
16
1.05
1.30
NOTE: ALL MEASUREMENTS
ARE IN MILLIMETERS.
e1
Q1
T
B1
A
Q
C
A1
Q2
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IRU1206/IRU1207/IRU1208/IRU1209(PbF)
PACKAGE SHIPMENT METHOD
PKG
DESIG
D
S
Y
PACKAGE
DESCRIPTION
TO-252, (D-Pak)
SOIC, Narrow Body
SOT-223
PIN
COUNT
2
8
3
PARTS
PER TUBE
75
95
80
1
1
1
PARTS
PER REEL
2500
2500
2500
1
T&R
Orientation
Fig A
Fig B
Fig C
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. 10/11/2005
12
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