Advanced Power
Electronics Corp.
Technology Licensed from International Rectifier
APU1206/APU1207/APU1208/APU1209
1A VERY LOW DROPOUT POSITIVE
FIXED AND ADJUSTABLE REGULATORS
FEATURES
Low Dropout Voltage (500mV at 1A)
2%
Voltage Reference Accuracy
Low Ground Current
1µA Maximum Quiescent Current in Shutdown
(APU1207,
APU1208)
Fast Transient Response
Current Limit and Thermal Shutdown
Error Flag Signal for Output out of Regulation
(APU1207,
APU1208)
RoHS Compliant
& Halogen Free
DESCRIPTION
The
APU1206
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 fea-
tures of the family of the parts are: micro-power shut-
down capability and output UVLO detection where Flag
pin is switched low when output is below 5% of its nomi-
nal point.
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)
.
TYPICAL APPLICATION
V
OUT
3
C2
V
OUT
APU1206-
XX
Gnd
2
V
IN
1
V
IN
C1
Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package.
Data and specifications subject to change without notice.
1
201503067
APU1206/APU1207/APU1208/APU1209
Advanced Power
Electronics Corp.
PACKAGE ORDER INFORMATION
T
J
(°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
2-PIN
TO-252(H)
APU1206H-18
APU1206H-25
APU1206H-33
NA
NA
NA
NA
NA
3-PIN
SOT-223(K)
APU1206K-18
APU1206K-25
APU1206K-33
NA
NA
NA
NA
NA
Basic Part
8-PIN PLASTIC
SOIC(M)
NA
NA
NA
APU1207M-18
APU1207M-25
APU1207M-33
APU1208M
APU1209M
VOLTAGE
1.8V
2.5V
3.3V
1.8V
2.5V
3.3V
Adj
Adj
PIN FUNCTIONS
V
IN
, V
OUT
, Gnd
V
IN
, V
OUT
, Gnd
V
IN
, V
OUT
, Gnd
V
IN
, V
OUT
, Gnd, Enable, Flag
V
IN
, V
OUT
, Gnd, Enable, Flag
V
IN
, V
OUT
, Gnd, Enable, Flag
V
IN
, V
OUT
, Gnd, Flag, Adj
V
IN
, V
OUT
, Gnd, Enable, Adj
STATUS
EOL
EOL
EOL
EOL
EOL
EOL
EOL
Alive
.
2
Advanced Power
Electronics Corp.
APU1206/APU1207/APU1208/APU1209
10V
10V
-65°C To 150°C
125°C
-40
o
C To 85
o
C
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V
IN
) ....................................................
Enable Input Voltage ................................................
Storage Temperature Range ......................................
Junction Temperature
.................................................
Operating Ambient
Temperature
Range .....................
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (H)
APU1206
FRONT VIEW
3
3-PIN PLASTIC SOT-223 (K)
APU1206
TOP VIEW
3
V
OUT
Tab is
Gnd
1
V
OUT
Gnd
V
IN
V
IN
θ
JA
=70°C/W
for
0.5" Sq pad
8-PIN PLASTIC SOIC (M)
APU1208
TOP VIEW
Tab is
Gnd
2
1
θ
JA
=90°C/W
for
0.4" Sq pad
APU1207
TOP VIEW
APU1209
TOP VIEW
Enable
V
IN
V
OUT
Flag
1
2
3
4
8
7
6
5
Gnd
Gnd
Gnd
Gnd
θ
JA
=55°C/W
for 1" Sq pad
Flag
V
IN
V
OUT
Adj
1
2
3
4
8
7
6
5
Gnd
Gnd
Gnd
Gnd
θ
JA
=55°C/W
for 1" Sq pad
Enable
V
IN
V
OUT
Adj
1
2
3
4
8
7
6
5
Gnd
Gnd
Gnd
Gnd
θ
JA
=55°C/W
for 1" Sq pad
ELECTRICAL SPECIFICATIONS
.
PARAMETER
Initial Voltage Accuracy
(see Table 1 for nominal values)
Line Regulation
Load Regulation (Note 1)
Output Voltage Temp Coef.
Dropout Voltage (Note 2)
SYM
Vo
∆V
I
∆V
L
Unless otherwise specified, these specifications apply over C
IN
=C
OUT
=10µF, V
IN
=Vo+1V, V
OUT
=V
FB
(For adjustable
version only), and T
A
=25°C. Typical values refer to T
A
=25°C. Low duty cycle pulse testing is used which keeps
junction and case temperatures equal to the ambient temperature.
TEST CONDITION
Io=10mA, T
A
=25℃
Vo + 1V<V
IN
<10
10mA<Io<1A
1mA<Io<150mA
MIN
-2
TYP
MAX
2
1
0.7
0.5
100
200
400
650
3
15
50
1.1
1.4
2.1
2.3
0.1
1
UNITS
%
%
%
ppm/℃
mV
0.5
0.5
20
100
300
500
Ground Current (Note 3)
Current Limit
Minimum Input Voltage
APU1208, APU1209
Adjust Pin Current
Minimum Load Current
∆V
O(T)
∆V
I(O)
Io=100mA
Io=500mA
Io=1000mA
I
Q
V
IN
=Vo + 1 for all conditions:
Io=100mA
Io=500mA
Io=1000mA
I
CL
Vo=5% Below Regulation Point
V
IN(min)
I
ADJ
I
O(min)
V
IN
=2.5V, Vo=V
ADJ
mA
A
V
µ
A
mA
3
APU1206/APU1207/APU1208/APU1209
PARAMETER
APU1207, APU1209
Ground Current - SD Activated
Enable Pin Input LO Voltage
Enable Pin Input HI Voltage
Enable Pin Input LO Current
Enable Pin Input HI Current
APU1207, APU1208
Flag Output Threshold Voltage
Flag Output Hysteresis Voltage
Flag Output Saturation Voltage
SYM
I
Q(SD)
V
EN(L)
V
EN(L)
TEST CONDITION
Enable=Open
Regulator OFF
Regulator ON
V
EN(L)
=0V to 0.8V
V
EN(L)
=2V to Vin
Advanced Power
Electronics Corp.
MIN
TYP
0.01
2
0.1
100
5
0.8
400
230
2
600
MAX
1
0.8
UNITS
µ
A
V
V
µ
A
µ
A
%V
O
%V
O
mV
V
TH(FG)
V
HYS
Output Ramping Up
V
F(SAT)
Io=5mA
Io=500µA
Note 1:
Low duty cycle pulse testing with Kelvin con-
nections is required in order to maintain accurate data.
Note 2:
Dropout voltage is defined as the minimum dif-
ferential voltage between V
IN
and V
OUT
required to main-
tain regulation at V
OUT
. It is measured when the output
voltage drops 1% below its nominal value.
Note 3:
Ground current is the regulator quiescent cur-
rent plus the pass transistor current. The total current
from the supply is the sum of the load current plus the
ground pin current.
PIN DESCRIPTIONS
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 V
OUT
in order
for the device to regulate properly.
V
OUT
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
(APU1207,
APU1209)
HI or to V
IN
for normal operation.
Flag
An open collector output that switches low when the output voltage drops about 4% below
(APU1207,
APU1208)
its expected regulated voltage.
Adj
A resistor divider from this pin to the V
OUT
pin and ground sets the output voltage.
(APU1208,
APU1209)
PIN SYMBOL
V
IN
(All devices)
APPLICATION INFORMATION
Stability
The
APU120X
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 in-
sures the stability of the system.
Part Number
APU1206-18
APU1206-25
APU1206-33
APU1207-18
APU1207-25
APU1207-33
APU1208
APU1209
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.
4
Advanced Power
Electronics Corp.
TYPICAL APPLICATION
V
OUT
APU1206/APU1207/APU1208/APU1209
3
C2
V
OUT
APU1206-
XX
Gnd
2
V
IN
1
V
IN
C1
Note:
Tab must also be
connected to ground.
Figure 2 - Typical application of
APU1206.
Ref Desig
C1
C2
Description
Capacitor
Capacitor
Qty
1
1
Part #
10µF, Tantalum
10µF, Tantalum
Manuf
AVX
AVX
.
5
Gnd
6
Gnd
7
Gnd
8
Gnd
Flag
V
OUT
V
IN
Enable
SD Enable
4
3
R1
Error Flag
V
OUT
C2
APU1207
2
1
V
IN
C1
Figure 3 - Typical application of
APU1207.
Ref Desig
C1
C2
R1
Description
Capacitor
Capacitor
Resistor
Qty
1
1
1
Part #
10µF, Tantalum
10µF, Tantalum
10KΩ,5%
Manuf
AVX
AVX
Panasonic
5
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