AP78LXX
0.15A Low Dropout Positive Regulator (Preliminary)
This datasheet contains new product information. Analog Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the
use of this product. No rights under any patent accompany the sale of the product.
Rev. 00. May.07, 2003
1/4
Features
• Output voltage tolerances of + 3% over temperature
range.
• Fast transient response
• Output current of 150mA.
• Built-in thermal shutdown
• Packages: TO-92.
• Good noise rejection
• 3-Terminal Fixed output voltage: 1.5V, 1.8V, 2.5V,
3.3V, 5.0V
Applications
• PC peripheral
• Communication
General Description
AP78LXX is a low dropout positive fixed-mode
regulator with minimum of 0.15A output current
capability. The product is specifically designed to
provide well-regulated supply for low voltage IC
applications such as high-speed bus termination
and low current 3.3V logic supply. AP78LXX is also
well suited for other applications such as VGA
cards.
Ordering Information
AP 78L XXX X
PackageVout
Z :TO-92L
15 : 1.5V
18 : 1.8V
25 : 2.5V
33 : 3.3V
05 : 5.0V
Packing
Blank : Tube or bulk
A : Taping
Typical Circuit
C2
10uF
8V
5.0V/
150mA
Vin Vout
GND
C1
10uF
8V/5V output regulator
AP78L05
Connection Diagram
VinVout GND
Buttom View
Pin Descriptions
NAME I/O PIN # FUNCTION
GND I 2 Ground.
Vout O 1 The output of the regulator. A minimum of 10uF capacitor must be
connected from this pin to ground to insure stability.
Vin I 3
The input pin of 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 dropout voltage during the load
transient response. This pin must always be 1.3V higher than Vout
in order for the device to regulate properly.
AP78LXX
0.15A Low Dropout Positive Regulator (Preliminary)
Rev. 00 MAy.07, 2003
2/4
Absolute Maximum Ratings
Symbol Parameter Rating Unit
VIN DC Supply Voltage -0.3 to 18 V V
PDPower Dissipation Internally Limited
TST Storage Temperature -65 to +150 oC
TOP Operating Junction Temperature Range 0 to +150 oC
Electrical Characteristics (Under Operating Conditions)
PARAMETER CONDITIONS MIN TYP MAX UNIT
AP78L15 IOUT = 10mA, TJ = 25oC,
3V≦VIN≦12V 1.455 1.500 1.545 V
AP78L18 IOUT = 10mA, TJ = 25oC,
3.3V≦VIN≦12V 1.746 1.800 1.854 V
AP78L25 IOUT = 10mA, TJ = 25oC,
4V≦VIN≦12V 2.425 2.500 2.575 V
AP78L33 IOUT = 10mA, TJ = 25oC,
4.8V≦VIN≦12V 3.200 3.300 3.4 V
Output Voltage
AP78L05 IOUT = 10mA, TJ = 25oC,
6.5V≦VIN≦12V 4.850 5.000 5.150 V
Line Regulation AP78LXX IO=10mA,VOUT+1.5V<VIN<18V,
TJ=25oC0.2 %
Load Regulation AP78LXX VIN=VOUT+2V,0mA<Io<0.15A,
TJ=25oC1%
Dropout Voltage
(VIN-VOUT)AP78LXX IOUT = 0.15A ,∆VOUT=1%VOUT 1.3 V
Minimum Load Current AP78LXX 0oC≦Tj≦125oC510mA
Thermal Regulation TA=25℃, 30ms pulse 0.008 0.04 %/W
F=120Hz,COUT=25uF Tantalum, IOUT=0.15A
Ripple Rejection AP78LXX VIN=VOUT+3V 60 70 dB
Temperature Stability IO=10mA 0.5 %
JA
θ
TO-92 Thermal Resistance Junction-to-Ambient(No
heat sink ;No air flow) 230 OC/W
JC
θ
TO-92 : Control Circuitry/Power Transistor
Thermal ResistanceJunction-to-Case 60 OC/W
Note1: Quiescent current is defined as the minimum output current required to maintain regulation. At 12V input/output differential the
device is guaranteed to regulate if the output current is greater than 10mA.
AP78LXX
0.15A Low Dropout Positive Regulator (Preliminary)
Rev. 00 MAy.07, 2003
3/4
Typical Performance Characteristics
Temperature (
o
C)
Percent Change in Output Voltage vs Temperature
Output Voltage Change (%)
-50 -25 0 25 50 75 100 125 150
- 2
-1.5
- 1
-0.5
0
0. 5
1
1.5
2
Input Voltage (V)
Line Regulation
Output Voltage Deviation (%)
0
0.2
0.4
0.6
0.8
1
24
6 8 10 12
TIME (us)
Line Transient Response
Output Voltage Deviation (mV) Input Voltage (V)
-40
-20
0
20
40
5.5
6.5
7.5 Cin=1uF
Cout=10uF Tantalum
0 20 40 60 80 100 120 140 160 180 200
TIME (us)
Load Transient Response
Load Current (A) Output Voltage Deviation (mV)
010
20 30 40 50 60 70 80 90 100
-1
0
0.1
0.2
-10
-5
0
5
10
15 C in = 1uF
C out = 10 uF Tantalum
Preload = 100mA
Output Current (mA)
Dropout Voltage vs Output Current
Dropout Voltage (V)
0
0. 5
0. 6
0. 7
0. 8
0.9
1.0
1.1
1.2
1.3
1.4
030 60 90 120
Tj = 125
o
C
Tj = 25
o
C
Temperature (
o
C)
Load Regulation vs Temperature
Output Voltage Deviation (%)
-25 0 25 50 75 100 125
- 1
-0.80
-0.40
-0.20
0
0.20
I load=150mA
150
AP78LXX
0.15A Low Dropout Positive Regulator (Preliminary)
Rev. 00 MAy.07, 2003
4/4
Marking Information
AC
78L XX
YY WW ~
Logo
( Top view )
15 =1.5V
18 =1.8V
25 =2.5V
33 =3.3V
05 =5.0V:
YY : Year
WW: Nth week
Date code Internal code
V
OUT
grade
Package Dimension
TO92-3L Package Outline Dimension
Db
b
1
b
EL
e
A
1
A
DIMENSIONS IN MILLMETER DIMENSIONS IN INCHES
SYMBLOS MIN NOM MAX MIN NOM MAX
A 3.302 3.556 3.810 0.130 0.140 0.150
A1 1.016 ---------- ---------- 0.040 ---------- ----------
b 0.330 0.381 0.432 0.013 0.015 0.017
b1 0.406 0.457 0.506 0.016 0.018 0.020
D 4.445 4.572 4.699 0.175 0.180 0.185
E 4.445 4.572 4.699 0.175 0.180 0.185
L 13.00 ---------- 15.50 0.512 ---------- 0.610
e 1.150 ---------- 1.390 0.045 ---------- 0.055
