Advanced Power
Electronics Corp.
Technology Licensed from International Rectifier
APU1205
300mA ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE AND FIXED REGULATORS
DESCRIPTION
FEATURES
The APU1205 device is an efficient linear voltage
regulator 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
shutdown.
Stable with 2.2uF Ceramic Capacitor
2% Voltage Reference Accuracy
Only 270mV Dropout at 300mA
and 170mV Dropout at 150mA
5uA Quiescent Current in Shutdown
Current Limit and Thermal Shutdown
Logic Input Enable Pin
The APU1205 is available in fixed and adjustable
output voltage versions in a small SOT-23 5-Pin package.
RoHS Compliant & Halogen-Free
SOT-23-5L & SOT-23-5LR Package
APPLICATIONS
Laptop, Notebook & Palmtop computers
Battery Powered Equipments
PCMCIA Vcc & Vpp Regulator
Consumer Electronics
High Efficiency Linear Power Supplies
TYPICAL APPLICATION
VOUT
VIN
VIN
VOUT
ADJ
+
R1
R2
Vo= 1.25 x (1+R1/R2)
+
C1
2.2uF
C2
2.2uF
GND
EN
Enable
Figure 1 - Typical application of the APU1205 adjustable voltage regulator.
VOUT=2.5V
VIN=3.3V
VIN
VOUT
CBYP
+
+
C1
2.2uF
C2
2.2uF
GND
EN
+ C3
1000pF
Enable
Figure 2 - Typical application of the APU1205-25 fixed voltage regulator.
PACKAGE / ORDERING INFORMATION
TOP VIEW
TOP VIEW
TOP VIEW
TOP VIEW
Halogen Free
EN GND VIN
EN GND VIN
VIN GND EN
VIN GND EN
APU1205X-XX-HF
3
2
1
3
2
1
3
2
1
3
2
1
Package
Output Voltage
SOT-23-5L
SOT-23-5LR
SOT-23-5L
SOT-23-5LR
4
5
4
5
4
5
Blank : ADJ
18 : 1.8V
25 : 2.5V
33 : 3.3V
4
5
Y5 : SOT-23-5L
Y5R : SOT-23-5LR
VOUT
ADJ
ADJ
VOUT
CBYP
VOUT
VOUT
CBYP
Fixed
Fixed
ADJ
ADJ
Data and specifications subject to change without notice
1
201206088