Advanced Power
Electronics Corp.
APU8836
FEATURES
SOT-23-5 Package
Stable with 2.2mF Ceramic Capacitor
2% Voltage Reference Accuracy
Only 320mV Dropout at 300mA
and 170mV Dropout at 150mA
5mA Quiescent Current in Shutdown
Current Limit and Thermal Shutdown
Logic Input Enable Pin
RoHS Compliant
300mA ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE AND FIXED REGULATORS
DESCRIPTION
The APU8836 device is an efficient linear voltage regula-
tor with better than 2% initial voltage accuracy, very low
dropout voltage and very low ground current designed
especially for hand held, battery powered applications.
Other features of the device are: TTL compatible enable/
shutdown control input, current limiting and thermal shut-
down.
The APU8836 is available in adjustable output
voltage versions in a small SOT-23 5-Pin package.
APPLICATIONS
Laptop, Notebook & Palmtop computers
Battery Powered Equipments
PCMCIA Vcc & Vpp Regulator
Consumer Electronics
High Efficiency Linear Power Supplies
TYPICAL APPLICATION
V
IN
C1
2.2uF
Gnd
VIN
.
V
OUT
R1
C2
2.2uF
R2
Adj
V
O
Vo = 0.8
3
1+
(
R1
R2
)
SD
Enable
EN
Figure 1 - Typical application of the APU8836 ajustable voltage regulator.
PACKAGE ORDER INFORMATION
APU8836X
Package
Y5 : SOT-23-5L
Y5R : SOT-23-5L
Data and specifications subject to change without notice.
1
201407156
APU8836
Advanced Power
Electronics Corp.
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V
IN
) ..................................................... 2.5 To 10V
Enable Input Voltage ................................................. 10V
Storage Temperature Range ....................................... -65°C To 150°C
Operating Junction Temperature Range ...................... 0°C To 150°C
o
o
Junction Temperature Range ...................... 0 C To 125 C
PACKAGE INFORMATION
TOP VIEW
SOT-23-5L
VIN GND
EN
TOP VIEW
SOT-23-5L
EN GND VIN
APU8836Y5
APU8836Y5R
VOUT
ADJ
ADJ
VOUT
Rthja=256℃/W
Rthja=256℃/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over C
IN
=Co=2.2mF, Io=100mA, V
IN(MIN)
=2.5V(Adjustable
devices), V
OUT
=V
FB
(for adjustable version only), VEN=2V and T
A
=25
o
C. Typical values refer to T
A
=25
o
C.
Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature.
PARAMETER
Reference Voltage
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
SYM
Vo
DV
I
DV
L
DV
I(O)
Vo + 1V<V
IN
<10V
1mA<Io<300mA
Io=100mA
TEST CONDITION
MIN
-2
TYP
MAX UNITS
2
0.005
1.5
10
%
%/V
%
mV
.
Io=150mA
170
Ground Current (Note 3)
I
Q
Io=300mA
V
EN
=2V, Io=1000mA
320
120
mA
Ground Current-SD Activated
Current Limit
Thermal Regulation
Adjust Pin Current
Enable Pin Input LO Voltage
Enable Pin Input HI Voltage
Enable Pin Input LO Current
Enable Pin Input HI Current
I
Q(SD)
I
CL
DV
P
I
ADJ
V
EN(L)
V
EN(H)
V
EN
=0V to 0.8V or Open
Vo=0V
V
IN
=10V, Io=150mA, 10ms Pulse
V
IN
=2.5V, Vo=V
ADJ
Regulator OFF
Regulator ON
V
EN(L)
=0V
V
EN(H)
=2V
320
5
420
0.05
0.1
0.8
2
0.1
20
mA
mA
%/W
mA
V
V
mA
mA
2
Advanced Power
Electronics Corp.
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 below its nominal value.
APU8836
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 SYMBOL
V
IN
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 higher
than V
OUT
by at least the amount of the dropout voltage and some margin in order for
the device to regulate properly.
Ground pin. This pin must be connected to the lowest potential in the system and all
other pins must be at higher potential with respect to this pin.
Enable pin. A low signal or left open on this pin shuts down the output. This pin must
be tied HI or to V
IN
for normal operation.
A resistor divider from this pin to the V
OUT
pin and ground sets the output voltage. To
minimize the error due to the error amplifier, select the values of the resistor dividers
to be less than 10KV.
Gnd
En
Adj
(Adjustable Only)
.
V
OUT
The output of the regulator. A minimum of 2.2mF with max ESR of 1V capacitor must
be connected from this pin to ground to insure stability.
3
APU8836
Advanced Power
Electronics Corp.
BLOCK DIAGRAM
V
IN
V
OUT
Adj
THERMAL
SHUTDOWN
+
0.8V
CURRENT
LIMIT
Gnd
Figure 2 - APU8836 Adjustable output block diagram.
En
.
4
Advanced Power
Electronics Corp.
TYPICAL PERFORMANCE CHARACTERISTICS
Current Limit (V
OUT
vs. I
OUT
)
Load Transient
I
OUT
=0mA ~ 150mA
APU8836
V
OUT
V
OUT
I
OUT
I
OUT
VIN=3.5V, R1/R2=2KΩ/1KΩ, CIN=COUT=2.2uF(EL Cap.)
VIN=3.5V, R1/R2=2KΩ/1KΩ, CIN=COUT=2.2uF(EL Cap.)
Ton=Toff=1mS, Rising=Falling=0.25A/uS
Power Sequence
Power ON (R
L
=16Ω)
Power OFF (R
L
=16Ω)
V
IN
V
IN
V
EN
V
OUT
I
OUT
V
EN
V
OUT
.
I
OUT
VIN=VEN=3.5V, R1/R2=2KΩ/1KΩ, CIN=COUT=2.2uF(EL Cap.)
Power Sequence
Power ON (R
L
=8Ω)
Power OFF (R
L
=8Ω)
V
IN
V
IN
V
EN
V
OUT
I
OUT
V
EN
V
OUT
I
OUT
VIN=VEN=3.5V, R1/R2=2KΩ/1KΩ, CIN=COUT=2.2uF(EL Cap.)
5
PCB设计
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