AS8863M5-2.8 [SIPEX]
Fixed Positive LDO Regulator, 2.8V, 0.26V Dropout, PDSO5, SOT-23, 5 PIN;
| 型号： | AS8863M5-2.8 |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | Fixed Positive LDO Regulator, 2.8V, 0.26V Dropout, PDSO5, SOT-23, 5 PIN 光电二极管 输出元件 调节器 |
| 文件： | 总8页 (文件大小：165K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AS8863
120 mA, Low Dropout Voltage Regulator
(Preliminary Information)
FEATURES
APPLICATIONS
•
•
•
•
•
•
•
Low Noise Output LDO
•
•
•
•
•
•
•
•
•
•
PDA
1% Initial Accuracy At 120mA
Very Low Quiescent Current
Low Dropout Voltage
Current & Thermal Limiting
Reverse-Battery Protection
Battery Powered Systems
Cellular Phone
Cordless Telephones
Radio Control Systems
Portable/Palm Top/Notebook Computers
Portable Consumer Equipment
Portable Instrumentation
Bar Code Scanners
Wide Range of Fix Output Voltages
1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, 4.5V, 5.0V, & ADJ
Zero Off-Mode Current
•
•
•
Small 5-Pin SOT-23
SMPS Post-Regulator
Pin Compatible to MAX8863
PRODUCT DESCRIPTION
The AS8863 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 AS8863 initial tolerance is less than 1% max
and has a logic compatible ON/OFF switching input. The unique features of the AS8863 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 AS8863 key features include protection against reversed battery, fold-back
current limiting, and automotive load dump protection.
The AS8863 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.
ORDERING INFORMATION
Part Number
Operating Junction
Accuracy
Package
Type
SOT-23-5
Temperature Range
-40°C to +125°C
X = Output Voltage, 3.0 for 3.0V, 3.3 for 3.3V etc, Blank for Adjustable
AS8863M5-X
1%
SOT-23-5 (M5)
SOT-23-5 (M5)
For other fixed voltages consult factory.
VOUT
VOUT
BYP
ADJ
MARKING INFORMATION
5
4
5
4
Voltage
Marking
Voltage
Marking
AS8863
1
AS8863
1
2
3
3
2
1.8
2.5
2.8
3.0
3.3
9WXX
9XXX
9YXX
A3XX
A2XX
4.5
4.70
5.0
A4XX
A5XX
A6XX
A7XX
VIN
EN GND
Top View
Fixed Output Voltage
EN GND VIN
Top View
Adjustable Output Voltage
ADJ
Rev. 10/6/00
AS8863
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
Input Voltage.................................................. +2.5V to+16V
Operating Junction Temperature Range ..... -40°C to +125°C
Enable Input Voltage............................................. 0V to VIN
SOT-23-5 (θJA) ..................................................... See Note 1
Power Dissipation...................................... Internally Limited
Lead Temp. (Soldering, 5 Seconds) ............................ 260°C
Operating Junction Temperature Range ..... -40°C to +125°C
Input Supply Voltage........................................-20V to +20V
Enable Input Voltage........................................-20V to +20V
ELECTRICAL CHARACTERISTICS
TJ = 25°C, VIN = VOUT + 1V, IL = 100µA, CL = 1.0µF, and VENABLE > 2.4V. Unless otherwise specified boldface applies over the
junction temperature range
Parameter
Test Conditions
Typ
Min
Max
Units
Output Voltage Tolerance (VOUT
)
-1
+1
%VNOM
IL = 100µA
IL = 500µA
-2
+2
Output Voltage Temperature Coef
Line Regulation
40
0.03
ppm/°C
%/V
VIN = VOUT + 1V to 16V
0.1
0.2
0.2
0.5
50
VIN = VOUT + 1V to 16V
Load Regulation
IL = 0.1mA to 120mA
IL = 0.1mA to 120mA
IL = 100 µA
0.1
%
Dropout Voltage (See Note 2)
(VIN- VO)
30
mV
IL = 50mA
140
190
< 1
190
260
1
IL = 120mA
Quiescent Current (IGND
)
VENABLE < 0.6V
µA
µA
VENABLE < 0.25V
5
Ground Pin Current
80
350
950
55
125
600
1600
IL = 100 µA
IL = 50 mA
IL = 120mA
(IGND
)
Ripple Rejection (PSRR)
Current Limit (ILIMIT
Output Noise (eNO
dB
mA
µVRMS
)
VOUT = 0V
360
320
2.0
)
IL = 50mA, CL = 1.0µF
390
(10Hz – 100KHz)
Input Voltage Level
Logic Low (VIL)
OFF
0.6
V
Input Voltage Level
Logic High (VIH
)
ON
ENABLE Input Current
VIL < 0.6V
0.01
2
2
µA
VIH > 2.0V
20
Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ (max), the junction to ambient thermal resistance, and
the ambient, θJA, and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is given:
P
D (max) = (TJ(max) - TA) θJA. Exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown.
The θJA of the AS8863 is 220oC/W mounted on a PC board.
Note 2: Not apply to 1.8V version.
Rev. 10/6/00
AS8863
TYPICAL APPLICATION
4
5
3
VIN
VOUT
+
1.0uF
2
GND
AS8863
+
1
EN
BYP
(Optn)
V
ENABLE may be tied directly to
IN
Rev. 10/6/00
AS8863
Application Hints
In general, linear regulator stability decreases with higher
output currents. In some applications the AS8863 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.
The AS8863 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 2.2µF aluminum electrolytic capacitor
covers all general application circuits, this stability can be
obtained with a tantalum electrolytic value of 1µF.
With the AS8863 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 AS8863 provides access to the internal reference. A 10µF 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 AS8863 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
CBYP. If the rapid turn-ON is necessary, omit bypass capacitor.
Figure 1 shows AS8863 standard application circuit. The EN (enable) pin is pulled high (>2.0V) to enable the regulator. To disable
the regulator, EN < 0.6V.
VIN
VOUT
4
5
3
+
2
GND
EN
AS8863
+
BYP
(Optn)
1
Hi-ON
Lo-OFF
Top View
Fig. 1
The AS8863 in figure 2 shows adjustable output voltage configuration. Two resistors set the output voltage. The formula for output
voltage is:
VOUT = 1.235V x (1+ R1)
R2
Resistor values are not critical as the Adj. pin has high input impedance, for best results use resistors of 47kΩ or less. A capacitor for
Adj to ground will provide improved noise performance.
3
2
1
4
VIN
VOUT
+
GND
EN
R1
R2
+
AS8863
5
ADJ
Byp
(Optn)
Hi-ON
Lo-OFF
Top View
Fig. 2
Rev. 10/6/00
AS8863
Ground Current Vs. Input Voltage
Dropout Voltage Vs. Load Current
110
100
90
200
150
100
50
80
70
60
Vo = 3.3V
IL = 100uA
CL = 1uF
Vin = 4.3V
Vo = 3.3V
CL = 1uF
50
40
0
30
0
20
40
60
80
100
120
120
120
4
6
8
10
Vin (V)
12
14
16
IL ( mA)
Ground Current Vs. Load Current
(in Dropout)
Output Voltage Vs. Input Voltage
3.330
3.325
3.320
3.315
3.310
3.305
3.300
3.295
3.290
1.50
1.00
0.50
0.00
3.3V Device
IL = 100uA
CL = 1uF
3.3V Device
Vin = 4.3V
CL = 1uF
0
20
40
60
80
100
4
6
8
10
12
14
16
IL (mA)
Vin (V)
Dropout Voltage Vs. Load Current
Output Voltage Vs. Load Current
3.310
3.308
3.306
3.304
3.302
3.300
200
150
100
50
3.3V Device
Vin = 4.3V
CL = 1uF
Vin = 4.3V
Vo = 3.3V
CL = 1uF
0
0
20
40
60
80
100
0
20
40
60
80
100
120
IL ( mA)
IL ( mA)
Rev. 10/6/00
AS8863
Ground Current Vs. Temperature
Ground Current Vs. Temperature
90.0
80.0
70.0
60.0
50.0
950
850
750
650
550
450
Vin = 4.3V
Vout = 3.3V
CL = 1uF
IL = 100uA
Vin = 4.3V
Vout = 3.3V
CL= 1uF
IL = 100mA
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (Degree C)
Temperature (Degree C)
Ground Current in Dropout Vs. Temperature
Output Voltage Vs Temperature
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
2.30
2.20
2.10
2.00
1.90
1.80
1.70
1.60
1.50
1.40
Vin = 4.3V
Vout = 3.3V
CL = 1uF
Vin = 4.3V
Vout = 3.3V
CL = 1uF
IL = 150mA
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Temperature (Degree C)
Temperature (Degree C)
Enable Voltage, On Threshold Vs. Input Voltage
1.60
1.50
1.40
1.30
1.20
1.10
1.00
0.90
0.80
Vout = 3.3V
IL = 100uA
CL = 1uF
4
6
8
10
12
14
16
Vin (V)
Rev. 10/6/00
AS8863
Rev. 10/6/00
AS8863
PACKAGE DRAWING
SOT-23-5L (M5)
D
B (5 PLACES)
H
E
e
e1
A
A2
C
A1
L
INCHES
MILLIMETERS
NOTE:
1. REFER TO APPLICABLE
MIN.
0.90
0
MAX
1.30
0.10
MIN.
MAX.
A
A1
A2
B
.035
0
.051
.004
2. CONTROLLING DIMENTION : MILLIMETER
3. PACKAGE SURFACE FINISHING TO BE SMOOTH
FINISH.
0.80 REF
.0315 REF
0.30
0.10
2.70
1.40
0.50
0.35
3.10
1.80
.012
.004
.106
.055
.019
.0137
.122
C
D
E
.071
e
.037 BSC.
0.95 BSC.
e1
H
L
1.70
2.50
2.10
3.00
.066
.098
.082
.118
MIN 0.2
MIN .0078
Rev. 10/6/00
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