Rev. 10/24/00
SPX8863
120 mA, Low Dropout Voltage Regulator
(Preliminary Information)
FEATURES APPLICATIONS
Low Noise Output LDO
PDA
1% Initial Accuracy At 120mA
Battery Powered Systems
Very Low Quiescent Current
Cellular Phone
Low Dropout Voltage
Cordless Telephones
Current & Thermal Limiting
Radio Control Systems
Reverse-Battery Protection
Portable/Palm Top/Notebook Computers
Wide Range of Fix Output Voltages
Portable Consumer Equipment
1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, 4.5V, 5.0V, & ADJ
Portable Instrumentation
Zero Off-Mode Current
Bar Code Scanners
Small 5-Pin SOT-23
Pin Compatible to MAX8863
SMPS Post-Regulator
PRODUCT DESCRIPTION
The SPX8863 is a low-power positive voltage regulator with ultra low noise output and very low dropout voltage. In addition, this
device offers very low quiescent current of approximately 600uA at 100mA output. The SPX8863 initial tolerance is less than 1%
max and has a logic compatible ON/OFF switching input. The unique features of the SPX8863 include a reference bypass pin for the
best performance results of low noise.
This device is an excellent choice for use in battery powered applications such as cellular/ cordless telephones, radio control systems,
and portable computers. When disabled power consumption drops to nearly zero. The device also has a very low output temperature
coefficient, making it a low power voltage reference. The SPX8863 key features include protection against reversed battery, fold-back
current limiting, and automotive load dump protection.
The SPX8863 is available in many fixed voltages (1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, 4.5V, & 5.0V) or with an adjustable output.
This device is offered in a small 5-pin SOT-23 package, providing a small footprint with all the performance features with fixed or
adjustable output.
MARKING INFORMATION
Voltage Marking
Voltage Marking
1.8 9WXX 4.5 A4XX
2.5 9XXX 4.70 A5XX
2.8 9YXX 5.0 A6XX
3.0 A3XX ADJ A7XX
3.3 A2XX
SOT-23-5 (M5)
3
2
1
Top View
SPX8863
5
4
SOT-23-5 (M5)
3
2
1
Top View
SPX8863
5
4
V
IN
GND
EN
EN
V
IN
GND
ADJ
BYP
V
OUT
V
OUT
Fixed Output Voltage
Adjustable Output Voltage
PIN CONNECTIONS
Rev. 10/24/00
SPX8863
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
Power Dissipation...................................... Internally Limited
Input Voltage.................................................. +2.5V to+16V
Lead Temp. (Soldering, 5 Seconds) ............................ 260
C
Operating Junction Temperature Range ..... -40
C to +125C
Operating Junction Temperature Range ..... -40
C to +125C
Enable Input Voltage............................................. 0V to V
IN
Input Supply Voltage........................................-20V to +20V
SOT-23-5 (
JA
) ..................................................... See Note 1
Enable Input Voltage........................................-20V to +20V
ELECTRICAL CHARACTERISTICS
T
J
= 25
C, V
IN
= V
OUT
+ 1V, I
L
= 100
A, C
L
= 1.0
F, and V
ENABLE
> 2.4V. Unless otherwise specified boldface applies over the
junction temperature range
Parameter Test
Conditions
Typ
Min
Max
Units
Output Voltage Tolerance (V
OUT
)
I
L
= 100
A
I
L
= 500
A
-1
-2
+1
+2
%V
NOM
Output Voltage Temperature Coef
40
ppm/
C
Line Regulation
V
IN
= V
OUT
+ 1V to 16V
V
IN
= V
OUT
+ 1V to 16V
0.03
0.1
0.2
%/V
Load Regulation
I
L
= 0.1mA to 120mA
I
L
= 0.1mA to 120mA
0.1
0.2
0.5
%
I
L
= 100
A
30
50
Dropout Voltage (See Note 2)
(V
IN
- V
O
)
I
L
= 50mA
140
190
I
L
= 120mA
190
260
Quiescent Current (I
GND
)
V
ENABLE
< 0.6V
V
ENABLE
< 0.25V
< 1
1
5
I
L
= 100
A
80
125
Ground Pin Current
(I
GND
)
I
L
= 50 mA
350
600
I
L
= 120mA
950
1600
Ripple Rejection (PSRR)
55
dB
Current Limit (I
LIMIT
) V
OUT
= 0V
360
320
mA
Output Noise (e
NO
)
I
L
= 50mA, C
L
= 1.0
F
(10Hz 100KHz)
390
V
RMS
Input Voltage Level
Logic Low (V
IL
)
OFF
0.6
Input Voltage Level
Logic High (V
IH
)
ON
2.0
ENABLE Input Current
V
IL
< 0.6V
V
IH
> 2.0V
0.01
2
2
20
A
Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, T
J (max)
,
the junction to ambient thermal resistance, and
the ambient,
JA
, and the ambient temperature T
A
. The maximum allowable power dissipation at any ambient temperature is given:
P
D (max)
= (T
J(max)
- T
A
)
JA
.
Exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown.
The
JA
of the SPX8863 is 220
o
C/W mounted on a PC board.
Note 2: Not apply to 1.8V version.
A
mV
A
V
Rev. 10/24/00
SPX8863
TYPICAL APPLICATION
+
+
GND
EN
SPX8863
1.0uF
1
2
3
5
4
V
OUT
ENABLE
may be tied directly to V
IN
BYP
(Optn)
V
IN
Rev. 10/24/00
V
OUT
GND
SPX8863
Top View
EN
BYP
(Optn)
V
IN
+
+
Fig. 1
Hi-ON
Lo-OFF
3
2
1
4
5
SPX8863
Application Hints
The SPX8863 requires an output capacitor for device stability.
The value required varies greatly depending upon the
application circuit and other factors. The high frequency
characteristics of electrolytic capacitors depend greatly on the
type and also on the manufacturer. Sometimes bench testing is
the only means to determine the proper capacitor type and
value. The high quality 2.2
F aluminum electrolytic capacitor
covers all general application circuits, this stability can be
obtained with a tantalum electrolytic value of 1
F.
In general, linear regulator stability decreases with higher
output currents. In some applications the SPX8863 may
operate at few milliamps. In these applications the output
capacitance can be further reduced. For example, when the
regulator is running at 10mA output current the output
capacitance value is half compared to the same regulator
that is running at 150mA.
With the SPX8863 adjustable regulator, the minimum value
of output capacitance is a function of the output voltage.
The value decreases with higher output voltages, since the
closed loop gain is increased.
Typical Applications Circuits
The SPX8863 provides access to the internal reference. A 10
F capacitor on the BYP pin will provide a significant reduction in
output noise. This pin may be left unconnected if the output noise is not a major concern. The SPX8863 start-up speed is inversely
proportional to the size of its capacitor. Applications requiring a slow ramp-up of output voltage should consider larger values of
C
BYP
. If the rapid turn-ON is necessary, omit bypass capacitor.
Figure 1 shows SPX8863 standard application circuit. The EN (enable) pin is pulled high (>2.0V) to enable the regulator. To disable
the regulator, EN < 0.6V.
The SPX8863 in figure 2 shows adjustable output voltage configuration. Two resistors set the output voltage. The formula for output
voltage is:
V
OUT
= 1.235V x (1+ R1)
Resistor values are not critical as the Adj. pin has high input impedance, for best results use resistors of 47k
or less. A capacitor for
Adj to ground will provide improved noise performance.
R2
V
IN
V
OUT
GND
Top View
EN
Byp
(Optn)
+
+
ADJ
R1
R2
Fig. 2
Hi-ON
Lo-OFF
SPX8863
1
2
3
4
5
Rev. 10/24/00
SPX8863
Dropout Voltage Vs. Load Current
0
50
100
150
200
0
20
40
60
80
100
120
IL ( mA)
Vin = 4.3V
Vo = 3.3V
CL = 1uF
Output Voltage Vs. Input Voltage
3.290
3.295
3.300
3.305
3.310
3.315
3.320
3.325
3.330
4
6
8
10
12
14
16
Vin (V)
3.3V Device
IL = 100uA
CL = 1uF
Output Voltage Vs. Load Current
3.300
3.302
3.304
3.306
3.308
3.310
0
20
40
60
80
100
120
IL ( mA)
3.3V Device
Vin = 4.3V
CL = 1uF
Ground Current Vs. Input Voltage
30
40
50
60
70
80
90
100
110
4
6
8
10
12
14
16
Vin (V)
I Gnd (uA)
Vo = 3.3V
IL = 100uA
CL = 1uF
Ground Current Vs. Load Current
(in Dropout)
0.00
0.50
1.00
1.50
0
20
40
60
80
100
120
IL (mA)
3.3V Device
Vin = 4.3V
CL = 1uF
Dropout Voltage Vs. Load Current
0
50
100
150
200
0
20
40
60
80
100
120
IL ( mA)
Vin = 4.3V
Vo = 3.3V
CL = 1uF
Rev. 10/24/00
SPX8863
Ground Current Vs. Temperature
50.0
60.0
70.0
80.0
90.0
-40
-20
0
20
40
60
80
100
120
Temperature (Degree C)
I Gnd (uA)
Vin = 4.3V
Vout = 3.3V
CL = 1uF
IL = 100uA
Output Voltage Vs Temperature
3.200
3.220
3.240
3.260
3.280
3.300
3.320
3.340
3.360
3.380
3.400
-40
-20
0
20
40
60
80
100
120
Temperature (Degree C)
Vout
(V)
Vin = 4.3V
Vout = 3.3V
CL = 1uF
Ground Current Vs. Temperature
450
550
650
750
850
950
-40
-20
0
20
40
60
80
100
120
Temperature (Degree C)
I Gnd (uA)
Vin = 4.3V
Vout = 3.3V
CL= 1uF
IL = 100mA
Ground Current in Dropout Vs. Temperature
1.40
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
2.30
-40
-20
0
20
40
60
80
100
120
Temperature (Degree C)
I Gnd (mA)
Vin = 4.3V
Vout = 3.3V
CL = 1uF
IL = 150mA
Enable Voltage, On Threshold Vs. Input Voltage
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
4
6
8
10
12
14
16
Vin (V)
VEN, On Threshold (V)
Vout = 3.3V
IL = 100uA
CL = 1uF
Rev. 10/24/00
SPX8863
Rev. 10/24/00
SPX8863
PACKAGE DRAWING
SOT-23-5L (M5)
MILLIMETERS
SYMBOL
0
0.90
0.30
0.80 REF
2.70
0.10
1.40
1.70
0.95 BSC.
MIN 0.2
2.50
MIN.
MAX
MIN.
MAX.
A
A1
A2
B
C
D
E
e
e1
H
L
0
.035
.012
.0315 REF
.106
.004
.055
.066
.037 BSC.
MIN .0078
.098
0.10
1.30
0.50
3.10
0.35
1.80
2.10
3.00
.004
.051
.019
.122
.0137
.071
.082
.118
INCHES
NOTE:
1. REFER TO APPLICABLE
2. CONTROLLING DIMENTION : MILLIMETER
3. PACKAGE SURFACE FINISHING TO BE SMOOTH
FINISH.
L
A1
C
A2
A
D
B (5 PLACES)
H
E
e1
e
Rev. 10/24/00
SPX8863
ORDERING INFORMATION
Ordering No.
Output Voltage
Packages
SPX8863M5
Adj
5 Lead SOT-23
SPX8863M5-1.8
1.5V
5 Lead SOT-23
SPX8863M5-2.5
2.5V
5 Lead SOT-23
SPX8863M5-2.8
2.8V
5 Lead SOT-23
SPX8863M5-3.0
3.0V
5 Lead SOT-23
SPX8863M5-3.3
3.3V
5 Lead SOT-23
SPX8863M5-4.0
4.0V
5 Lead SOT-23
SPX8863M5-4.5
4.5V
5 Lead SOT-23
SPX8863M5-5.0
5.0V
5 Lead SOT-23
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and Main Offices:
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: sales@sipex.com
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 935-7600
FAX: (408) 934-7500
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described
hereing; neither does it convey any license under it patent rights nor the rights of others.
Corporation
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