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SPX2700/01/02
700mA Low Dropout Voltage Regulators With Shutdown
(PRELIMINARY INFORMATION)
FEATURES
* Output Current 700mA at 3.3V and 5V * Internal Short Circuit Current Limit * Dropout Voltage 0.5V at 700mA Output * Extremely Tight Load and Line Regulation * Very Low Temperature Coefficient * Mirror Image Insertion Protection * Unregulated DC Input Can Withstand -20V Reverse Battery and +60V Positive Transients * Direct Replacement For LM2937 Socket
APPLICATIONS
* Battery Powered Systems * Cordless Telephones * Automotive Electronics * Portable/ Palm Top / Notebook Computers * Portable Consumer Equipment * Portable Instrumentation * SMPS Post-Regulator * Voltage Reference
PRODUCT DESCRIPTION
The SPX2700/01/02 are a low power positive voltage regulators. The SPX2700/01/02 offers 700mA output current with a dropout voltage of only 0.5V and over temperature dropout is up to 1V. The quiescent current is 10mA at differential output of 5V and output current of 700mA. A higher quiescent current can exist when the device is in dropout mode (VIN -VOUT 3V). The regulator will automatically shut down to protect both the internal circuits and the load. This device also features short circuit and thermal overload protection. The SPX2700/01/02 is offered in 3 and 5 pin TO-220, TO-263 and 3-pin SOT-223 packages compatible with other 5V and 3.3V regulators, TO-263 and 3-pin SOT-223. The device is offered in standard output voltages of 5V and 3.3V as well as in adjustable output regulator.
PIN CONNECTIONS
TO-263-5 (T) TO-220-5 (U) TO-220-3 (U) TO-263-3 (T) SOT-223 (M3)
SPX 2700/01/02 12345
SPX2700 SPX 2701/02
1 2 3 45
Five Lead Package Pin Functions: 1) 2) 3) 4) 5) Error Input GND Output Shutdown Adjust Shutdown GND Input Output
SPX2700
1 2 3
SPX2700
3 1 2 3
1
2
VIN GND VOUT VIN GND VOUT
Top View
Top View Front View
Top View
VIN GND V OUT
Front View
Rev. 10/25/00
SPX2700/01/02
ABSOLUTE MAXIMUM RATINGS
Power Dissipation..........................................Internally Limited Lead Temp. (Soldering, 10 Seconds) .............................. 260C Feedback Input Voltage...................................... -1.5V to +30V Shutdown Input Voltage..................................... -0.3V to +30V Error Comparator Output ................................... -0.3V to +30V Continuous ......................... +12V Transient................-20V to +60V Storage Temperature Range .........................-65 to +150C Operating Junction Temperature Range ..... -40C to +125C ESD Rating .....................................2KV Min Input Supply Voltage
ELECTRICAL CHARACTERISTICS at VIN = VO + 5V, IO = 700mA, CO = 10 F, unless otherwise specified. Limits in Boldface type apply over the entire operating temperature range. All other specifications are TA = 25C. Parameter Conditions Typ. SPX2700/01/02A SPX2700/01/02 Units (Note 2) Min Max Min Max
3.3V Version Output Voltage -40CTJ+125C 1mA IL500mA 5V Version Output Voltage -40CTJ+125C 1mA IL700mA All Voltage Options Output Voltage Temperature Coefficient Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage (Note 5) 3.3 3.3 3.267 3.217 3.333 3.382 3.234 3.185 3.366 3.415 V
5.0 5.0
4.950 4.880
5.050 5.120
4.900 4.870
5.100 5.130
V
20 (Note1) 6V VIN30V (Note4) IL = 1 to 700 IL = 0.1 to 1mA IL = 1mA IL = 700mA 0.03 0.04 60 375 100 4.5 15 IL = 700mA 20
100 0.1 0.40 0.20 0.30 100 150 400 500 150 180 2 2.5 14 16 20 22 700 800 0.2 1.0 0.60 1.0
150 0.20 0.80 0.30 0.50 100 150 400 500 150 180 2 2.5 14 16 20 22 700 800 0.2 0.60
ppm/C %max %max mV
Ground Current
IL = 1mA
A mA
Current Limit Thermal Regulation Output Noise, 10Hz to 100kHz IL = 100mA Adjustable Versions Only Reference Voltage Feedback Pin Bias Current Reference Voltage Temperature Coefficient Feedback Pin Bias Current Temperature Coefficient
VOUT = 0 0.05 CL = 2.2F CL = 33F Over Temperature (Note 6) 400 200 1.235 20 (Note 7) 50 0.1
mA %/w V Vrms V nA ppm/C NA/C
1.210 1.200 1.185
1.260 1.270 1.285 40 60
1.200 1.980 1.185
1.270 1.272 1.285 60 80
Rev. 10/25/00
SPX2700/01/02
ELECTRICAL CHARACTERISTICS at VIN = VO + 5V, IO = 700mA, CO = 22 F, unless otherwise specified. Limits in Boldface type apply over the entire operating temperature range. All other specifications are TA = 25C. Parameter Conditions Typ. SPX2700/01/02A SPX2700/01/02 Units Min Max Min Max
Error Comparator Output Leakage Current Output Low Voltage Upper Threshold Voltage Lower Threshold Voltage Hysteresis Shutdown Input Input Logic Voltage Shutdown Pin Input Current VOH = 30V VIN = 4.5V IOL = 400A (Note 8) (Note 8) (Note 8) Low (Regulator ON) High (Regulator OFF) VS = 2.4V VS = 30V Regulator Output Current In Shutdown 0.01 150 60 75 15 0.7 2.0 30 450 3 50 100 600 750 10 20 2.0 90 150 800 1000 15 25 A 0.7 40 25 95 140 1.00 2.00 250 400 40 25 95 140 1.00 2.00 250 400 A mV mV mV mV V
A
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. Note 2: Unless otherwise specified all limits are guaranteed for Tj = 25C, VIN = 6V, IL = 100A and CL = 1F. Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output sense (VOUT = 5V) and VSHUTDOWN 0.8V. Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 4: Line regulation for the SPX2700/01/02 is tested at 150C for IL = 1 mA. For IL = 100A and TJ = 125C, line regulation is guaranteed by design to 0.2%. See typical performance characteristics for line regulation versus temperature and load current. Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account. Note 6: VREF VOUT (Vin - 1V), 2.3 Vin30V, 100AIL 250 mA, TJ TJMAX. Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. Note 8: VSHUTDOWN 2V, VIN 30V, VOUT =0, Feedback pin tied to 5V Tap. Note 9: The junction -to-ambient thermal resistance of the TO-92 package is 180C/ W with 0.4" leads and 160C/ W with 0.25" leads to a PC board. The thermal resistance of the 8-Pin DIP package is 105C/W junction-to-ambient when soldered directly to a PC board. Junction-to-ambient thermal resistance for the SOIC (S) package is 160C/W.
UNREGULATED DC 5V @ 700mA MAX FEEDBACK INPUT OUTPUT
+
SENSE + _ FROM CMOS OR TTL 180k .. ERROR AMPLIFIER 60k .. + 60 mV + 1.23V REFERENCE + _ ERROR DETECTION COMPARATOR ______ ERROR
5V TAP + 1 F ..
330k ..
SHUTDOWN
TO CMOS OR TTL
GROUND
SPX2700/01/02 Block Diagram
Rev. 10/25/00
SPX2700/01/02
APPLICATION HINTS EXTERNAL CAPACITORS The stability of the SPX2700/01/02 requires a 10F or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most types of tantalum or aluminum electrolytic works fine here. For operations below -25C solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30C. The ESR of about 5 or less and resonant frequency above 500 kHz are the most important parameters in the value of the capacitor. The capacitor value may be increased without limit. At lower values of output current, less output capacitance is required for stability. For the currents below 10mA the value of the capacitor can be reduced to 22F and 0.15F for 1mA. More output capacitance is needed for the 8-pin version at voltages below 5V since it runs the error amplifier at lower gain. At worst case 22F or greater must be used for the condition of 750mA load at 1.23V output. The SPX2700/01/02, unlike other low dropout regulators will remain stable and in regulation with no load in addition to the internal voltage divider. This feature is especially important in applications like CMOS RAM keep-alive. When setting the output voltage of the SPX2700/01/02 version with external resistors, a minimum load of 5mA is recommended. If there is more than 10 inches of wire between the input and the AC filter capacitor or if a battery is used as the input then a 1A tantalum or aluminum electrolytic capacitor should be placed from the input to the ground. ERROR DETECTION COMPARATOR OUTPUT
4.75V OUTPUT VOLTAGE _______ ERROR*
high around 5V input (input voltage at which Vout = 4.75 ). Since the SPX2700/01/02's dropout voltage is load dependent, the input voltage trip point (around 5V) will vary with the load current. The output voltage trip point (approx. 4.75V) does not vary with load. The error comparator has an open-collector output, which requires an external pull-up resistor. Depending on the system requirements the resistor may be returned to 5V output or other supply voltage. In determining the value of this resistor, note that the output is rated to sink 250A, this value adds to battery drain in a low battery condition. Suggested values range from 100K to 1M. If the output is unused this resistor is not required. PROGRAMMING THE OUTPUT VOLTAGE OF SPX2700/01/02 The SPX2700/01/02 may be programmed for any output voltage between its 1.235V reference and its 30V maximum rating . As seen in Figure 2, an external pair of resistors is required. Refer to the below equation for the programming of the output voltage: VOUT = VREF x (1 + R1\ R2)+ IFBR1 The VREF is 1.235 and IFB is the feedback bias current, nominally -20 nA. The minimum recommended load current of 1A forces an upper limit of 1.2 M on value of R2. If no load is presented the IFB produces an error of typically 2% in VOUT, which may be eliminated at room temperature by trimming R1. To improve the accuracy choose the value of R2 = 100k this reduces the error by 0.17% and increases the resistor program current by 12A. Since the SPX2700/01/02 typically draws 100A at no load with SHUTDOWN open-circuited this is a small price to pay REDUCING OUTPUT NOISE It may be an advantage to reduce the AC noise present at the output. One way is to reduce the regulator bandwidth by increasing the size of the output capacitor. This is the only way that noise can be reduced on the 3 lead SPX2700/01/02 but is relatively inefficient, as increasing the capacitor from 1F to 220F only decreases the noise from 430V to 160VRMS for a 100 kHz bandwidth at 5V output. Noise could also be reduced fourfold by a bypass capacitor across R1, since it reduces the high frequency gain from 4 to unity. Pick
+5.0V
INPUT VOLTAGE
+1.3V
+ +
CBYPASS 1 / 2R1 x 200 Hz or choose 0.01F. When doing this, the output capacitor must be increased to 3.3F to maintain stability. These changes reduce the output noise from 430V to 100VRMS for a 100 kHz bandwidth at 5V output. With the bypass capacitor added, noise no longer scales with output voltage so that improvements are more dramatic at higher output voltages.
SHUTDOWN VOUT VIN
* See Application Info.
_______ Figure 1. ERROR Output Timing
The Comparator produces a logic low output whenever the SPX2700/01/02 output falls out of regulation by more than around 5%. This is around 75mV offset divided by the 1.235 reference voltage. This trip level remains 5% below normal regardless of the programmed output voltage of the regulator. Figure 1 shows the timing diagram depicting the ERROR signal and the regulator output voltage as the SPX2700/01/02 input is ramped up and down. The ERROR signal becomes low at around 1.3V input, and goes
SPX2703
GND
ADJ
Fig.2 Adjustable Voltage Regulator
Rev. 10/25/00
SPX2700/01/02
TO-263-5L (T)
0.055 (1.397) 0.405 0.005 (10.287 0.127)
0.176 0.005 (4.470 0.127) 0.050 0.002 (1.270 0.051)
0.356 0.005 (9.042 0.127)
0.600 0.025 (15.24 0.635)
0.100 0.010 (2.540 0.254)
0.067 0.005 (1.702 0.127)
0.032 0.003 (0.813 0.076)
0.015 (0.381
+ 0.003 + 0.074) 0 8
Rev. 10/25/00
SPX2700/01/02
TO-263-3L (T)
0.405 0.005 (10.287 0.127)
0.055 (1.397)
0.176 0.005 (4.470 0.127) 0.050 0.002 (1.270 0.051)
0.356 0.005 (9.042 0.127) 0.600 + 0.025 (15.24 0.635) 0.100 0.010 (2.540 0.254)
0.103 BSC (2.616)
0.050 (1.270) 0.032 + 0.001 (0.813 + 0.025) -
0.015 (0.381
+ + -
0.003 0.074) 0 8
Rev. 10/25/00
SPX2700/01/02
TO-220-3L (U)
0.151D 0.002 (3.835 D 0.051) 0.408 0.013 (10.36 0.33) 0.110 0.010 (2.794 0.254)
0.180 0.005 (4.572 0.127) 0.050 0.002 (1.270 0.051)
0.250 0.010 (6.350 0.254) Tapered 1o 2 Sides
0.340 0.010 (8.636 0.254)
SEATING PLANE
0.150 MIN (3.81 MIN) 0.540 0.015 (13.720 0.381)
1.020 0.015 (25.910 0.381) 7o Typ.
0.410 (10.41)
0.050 TYP (1.27 TYP) 0.200 0.010 (5.080 0.254)
0.100 0.010 (2.540 0.254) 0.032 0.005 (0.813 0.127) 0.015 0.010/-0.002 (0.381 0.254/-0.051)
0.015 0.010/-0.015 (2.667 0.254/-0.381)
Rev. 10/25/00
SPX2700/01/02
TO-220-5L (U)
0.150 D + 0.005 (3.81D + 0.13) 0.400 + 0.005 (10.16+ 0.13) 0.108 + 0.005 (2.74 + 2.74) -
0.175 + 0.005 (4.45 + 0.13) 0.050 + 0.005 (1.27 + 0.13) -
0.250 + 0.005 (6.35 + 0.13) -
0.590 + 0.005 (14.99 + 0.13) -
SEATING PLANE 1.137 REF (28.88 REF) 7 Typ.
0.547 + 0.005 (13.89 + 0.005) -
0.067 (1.70
+ 0.005 + 0.127) -
0.268 REF (6.81 REF)
0.032 + 0.005 (0.81 + 0.13) 0.268 REF 0.015 + 0.005 (0.38 + 0.13) -
0.105 (2.67
+ 0.005 + 0.13) -
Rev. 10/25/00
SPX2700/01/02
SOT-223-3L (M3)
0.124 0.116
0.146 0.295 0.130 0.264
0.0905 NOM 0.181 NOM
0.041 0.033
0.146 0.130 0.0040 0.0008 0.264 0.248
16C 10C 16C 10C Max
0.014 0.010
0.033 0.025
16C 10C
Rev. 10/25/00
SPX2700/01/02
ORDERING INFORMATION Ordering No.
SPX2700M3-3.3 SPX2700M3-5.0 SPX2700AM3-3.3 SPX2700AM3-5.0 SPX2700T3-3.3 SPX2700T3-5.0 SPX2700AT3-3.3 SPX2700AT3-5.0 SPX2700T5-3.3 SPX2700T5-5.0 SPX2700AT5-3.3 SPX2700AT5-5.0 SPX2700U3-3.3 SPX2700U3-5.0 SPX2700AU3-3.3 SPX2700AU3-5.0 SPX2700U5-3.3 SPX2700U5-5.0 SPX2700AU5-3.3 SPX2700AU5-5.0 SPX2701T3-3.3 SPX2701T3-5.0 SPX2701AT3-3.3 SPX2701AT3-5.0 SPX2701T5-3.3 SPX2701T5-5.0 SPX2701AT5-3.3 SPX2701AT5-5.0 SPX2701U3-3.3 SPX2701U3-5.0 SPX2701AU3-3.3 SPX2701AU3-5.0 SPX2701U5-3.3 SPX2701U5-5.0 SPX2701AU5-3.3 SPX2701AU5-5.0 SPX2702T3 SPX2702AT3 SPX2702T5 SPX2702AT5 SPX2702U3 SPX2702AU3 SPX2702U5 SPX2702AU5
Precision
2% 2% 1% 1% 2% 2% 1% 1% 2% 2% 1% 1% 2% 2% 1% 1% 2% 2% 1% 1% 2% 2% 1% 1% 2% 2% 1% 1% 2% 2% 1% 1% 2% 2% 1% 1% 2% 1% 2% 1% 2% 1% 2% 1%
Output Voltage
3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.0V 5.0V Adj Adj Adj Adj Adj Adj Adj Adj
Packages
3 Lead TO-223 3 Lead TO-223 3 Lead TO-223 3 Lead TO-223 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 5 Lead TO-263 5 Lead TO-263 5 Lead TO-263 5 Lead TO-263 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 5 Lead TO-220 5 Lead TO-220 5 Lead TO-220 5 Lead TO-220 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 5 Lead TO-263 5 Lead TO-263 5 Lead TO-263 5 Lead TO-263 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 5 Lead TO-220 5 Lead TO-220 5 Lead TO-220 5 Lead TO-220 3 Lead TO-263 3 Lead TO-263 5 Lead TO-263 5 Lead TO-263 3 Lead TO-220 3 Lead TO-220 5 Lead TO-220 5 Lead TO-220
Rev. 10/25/00
SPX2700/01/02
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 its patent rights nor the rights of others.
Rev. 10/25/00

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