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SPX8863
120 mA, Low Dropout Voltage Regulator
(Preliminary Information)
FEATURES
* * * * * * * * * * Low Noise Output LDO 1% Initial Accuracy At 120mA Very Low Quiescent Current Low Dropout Voltage Current & Thermal Limiting Reverse-Battery Protection 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 Pin Compatible to MAX8863
APPLICATIONS
* * * * * * * * * * PDA Battery Powered Systems Cellular Phone Cordless Telephones Radio Control Systems Portable/Palm Top/Notebook Computers Portable Consumer Equipment Portable Instrumentation Bar Code Scanners 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 1.8 2.5 2.8 3.0 3.3 Marking 9WXX 9XXX 9YXX A3XX A2XX Voltage 4.5 4.70 5.0 ADJ Marking A4XX A5XX A6XX A7XX
BYP 5
PIN CONNECTIONS
SOT-23-5 (M5)
VOUT 4 2 3
SOT-23-5 (M5)
ADJ 5 VOUT 4 2 3
SPX8863
1
SPX8863
1
EN GND VIN
EN GND VIN
Top View Fixed Output Voltage
Top View Adjustable Output Voltage
Rev. 10/24/00
SPX8863
ABSOLUTE MAXIMUM RATINGS
Power Dissipation...................................... Internally Limited Lead Temp. (Soldering, 5 Seconds) ............................ 260C Operating Junction Temperature Range ..... -40C to +125C Input Supply Voltage........................................-20V to +20V Enable Input Voltage........................................-20V to +20V
RECOMMENDED OPERATING CONDITIONS
Input Voltage.................................................. +2.5V to+16V Operating Junction Temperature Range ..... -40C to +125C Enable Input Voltage............................................. 0V to VIN SOT-23-5 (JA) ..................................................... See Note 1
ELECTRICAL CHARACTERISTICS
TJ = 25C, VIN = VOUT + 1V, IL = 100A, CL = 1.0F, 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) Output Voltage Temperature Coef Line Regulation Load Regulation Dropout Voltage (See Note 2) (VIN- VO) Quiescent Current (IGND) Ground Pin Current (IGND) Ripple Rejection (PSRR) Current Limit (ILIMIT) Output Noise (eNO) Input Voltage Level Logic Low (VIL) Input Voltage Level Logic High (VIH) ENABLE Input Current IL = 100A IL = 500A VIN = VOUT + 1V to 16V VIN = VOUT + 1V to 16V IL = 0.1mA to 120mA IL = 0.1mA to 120mA IL = 100 A IL = 50mA IL = 120mA VENABLE < 0.6V VENABLE < 0.25V IL = 100 A IL = 50 mA IL = 120mA VOUT = 0V IL = 50mA, CL = 1.0F (10Hz - 100KHz) OFF ON VIL < 0.6V VIH > 2.0V 2.0 0.01 2 2 20 A 40 0.03 0.1 30 140 190 <1 80 350 950 55 360 390 0.6 -1 -2 +1 +2 0.1 0.2 0.2 0.5 50 190 260 1 5 125 600 1600 320 %VNOM ppm/C %/V % mV
A A dB mA VRMS
V
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, JA, and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is given: PD (max) = (TJ(max) - TA) 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 220oC/W mounted on a PC board. Note 2: Not apply to 1.8V version.
Rev. 10/24/00
SPX8863
TYPICAL APPLICATION
VIN
3
4
VOUT
+ +
GND 2
SPX8863
1.0uF
EN
1
5 BYP (Optn)
ENABLE may be tied directly to VIN
Rev. 10/24/00
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 2.2F aluminum electrolytic capacitor covers all general application circuits, this stability can be obtained with a tantalum electrolytic value of 1F. 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 10F 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 CBYP. 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.
V IN GND EN Hi-ON Lo-OFF V OUT + SPX8863 5 BYP (Optn)
3 2 1 +
4
Top View
Fig. 1
The SPX8863 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 47k or less. A capacitor for Adj to ground will provide improved noise performance.
V IN + GND EN Hi-ON Lo-OFF 3 2 1 SPX8863 5 ADJ R2 4 R1 + VOUT
Byp (Optn)
Top View
Fig. 2
Rev. 10/24/00
SPX8863
Dropout Voltage Vs. Load Current
110 200 100 90 150 I Gnd (uA) 80 70 60 50 40 0 0 20 40 60 IL ( mA) 80 100 120 30 4 6 8 10 Vin (V) 12 14 16 Vo = 3.3V IL = 100uA CL = 1uF
Ground Current Vs. Input Voltage
100
Vin = 4.3V Vo = 3.3V CL = 1uF
50
Ground Current Vs. Load Current (in Dropout)
3.330 1.50 3.325 3.320 1.00 3.315 3.310 3.305 0.50
3.3V Device Vin = 4.3V CL = 1uF
Output Voltage Vs. Input Voltage
3.3V Device IL = 100uA CL = 1uF
3.300 3.295 3.290 120 4 6 8 10 Vin (V) 12 14 16
0.00 0 20 40 60 IL (mA) 80
100
Dropout Voltage Vs. Load Current
3.310 200 3.308 150 3.306 100
Vin = 4.3V Vo = 3.3V CL = 1uF
Output Voltage Vs. Load Current
3.3V Device Vin = 4.3V CL = 1uF
3.304 3.302 3.300 0 20 40 60 IL ( mA) 80 100 120 0 20 40 60 IL ( mA) 80 100 120
50
0
Rev. 10/24/00
SPX8863
Ground Current Vs. Temperature
90.0 950
Ground Current Vs. Temperature
80.0
850 Vin = 4.3V Vout = 3.3V CL = 1uF IL = 100uA
I Gnd (uA)
70.0
I Gnd (uA)
750
650 Vin = 4.3V Vout = 3.3V CL= 1uF IL = 100mA
60.0 550
50.0 -40 -20 0 20 40 60 80 100 120
450 -40 -20 0 20 40 60 80 100 120
Temperature (Degree C)
Temperature (Degree C)
Ground Current in Dropout Vs. Temperature
2.30 2.20 2.10 I Gnd (mA) 2.00 1.90 1.80 1.70 1.60 1.50 1.40 -40 -20 0 20 40 60 80 100 120 Temperature (Degree C) Vin = 4.3V Vout = 3.3V CL = 1uF IL = 150mA
3.400 3.380 3.360 3.340 3.320 Vout (V) 3.300 3.280 3.260 3.240 3.220 3.200 -40
Output Voltage Vs Temperature
Vin = 4.3V Vout = 3.3V CL = 1uF
-20
0
20
40
60
80
100
120
Temperature (Degree C)
Enable Voltage, On Threshold Vs. Input Voltage
1.60 1.50 VEN, On Threshold (V) 1.40 1.30 1.20 1.10 1.00 0.90 0.80 4 6 8 10 Vin (V) 12 14 16 Vout = 3.3V IL = 100uA CL = 1uF
Rev. 10/24/00
SPX8863
Rev. 10/24/00
SPX8863
PACKAGE DRAWING SOT-23-5L (M5)
D B (5 PLACES)
E
H
e e1
A
A2
A1 L
C
SYMBOL
MILLIMETERS
INCHES
MIN. 0.90 0 0.30 0.10 2.70 1.40 1.70 2.50
MAX 1.30 0.10
MIN. .035 0 .012 .004 .106 .055 .066 .098
MAX. .051 .004 .019 .0137 .122 .071 .082 .118
NOTE: 1. REFER TO APPLICABLE 2. CONTROLLING DIMENTION : MILLIMETER 3. PACKAGE SURFACE FINISHING TO BE SMOOTH FINISH.
A A1 A2 B C D E e e1 H L
0.80 REF 0.50 0.35 3.10 1.80 2.10 3.00
.0315 REF
0.95 BSC.
.037 BSC.
MIN 0.2
MIN .0078
Rev. 10/24/00
SPX8863
ORDERING INFORMATION Ordering No.
SPX8863M5 SPX8863M5-1.8 SPX8863M5-2.5 SPX8863M5-2.8 SPX8863M5-3.0 SPX8863M5-3.3 SPX8863M5-4.0 SPX8863M5-4.5 SPX8863M5-5.0
Output Voltage
Adj 1.5V 2.5V 2.8V 3.0V 3.3V 4.0V 4.5V 5.0V
Packages
5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23 5 Lead SOT-23
Corporation
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.
Rev. 10/24/00

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