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SPX2730/31/32/33
3A High Current Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response
(ADVANCED INFORMATION)
FEATURES
* Adjustable Output Down To 1.2V * 1% output accuracy @ 3.3V, 5.0V * Output Current of 3A * Low Dropout Voltage 370mV(Typ.) @ 3A. * Extremely Tight Load And Line Regulation * Extremely Fast Transient Response * Standard 3-Terminal Low Cost TO-220, TO-263 * Reverse-battery and "Load Dump" Protection * Zero Current Shutdown Mode (5-Pin Versions) * Error Flag Signal Output Out-of Regulation (5-Pin Versions)
APPLICATIONS
* Powering VGA & Sound Card * Power PCSupplies * SMPS Post-Regulator * High Efficiency "Green" Computer Systems * High Efficiency Linear Power Supplies * Portable Instrumentation * Constant Current Regulators * Adjustable Power Supplies * Battery charger
PRODUCT DESCRIPTION
The SPX2730/31/32/33 is a 3A high accuracy, low dropout voltage regulator (370mV(Typ)@ 3A). The SPX2730/31/32/33 is designed for low voltage application that requires lower dropout voltage and faster transient response. This device is an excellent choice for use in powering low voltage microprocessor that require a lower dropout, faster transient response to regulate from +2.5V to 3.8V supplies and as a post regulator for switching supplies applications. The SPX2730/31/32/33 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. Features such as enable pin, Error flag pin are also included in the 5-pin package. The SPX2730/31/32/33 are offered in 3 & 5 pin TO-220 & TO-263 packages compatible with other 3 terminal regulators.
PIN CONNECTIONS
TO-220-3 (U) TO-263-3 (T) TO-263-5 (T) SPX2731
1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) FLAG
TO-220-5 (U)
SPX2730
1 2 3
SPX2731/32/33
SPX2732
1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) ADJUST
SPX2733
1) FLAG 2) INPUT 3) GND 4) OUTPUT 5) ADJUST
SPX2730
1 2 3
SPX2731/32/33
SPX2731
1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) FLAG
SPX2732
1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) ADJUST
SPX2733
1) FLAG 2) INPUT 3) GND 4) OUTPUT 5) ADJUST
12345
1 2 3 45
Top View
Top View
Front View
Front View
Rev. 12/7/00
SPX2730/31/32/33
ABSOLUTE MAXIMUM RATINGS
Lead Temp. (Soldering, 5 Seconds) ................................ 260C
Storage Temperature Range ...................................................... -65 to +150C
Maximum Input Voltage ...................................... 16V
Operating Junction Temperature Range
SPX2730/31/32/33 Control Section ................................ -45C +125C SPX2730/31/32/33 Power Transistor............................... -45C +150C
ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 10mA, Ta=25C, unless otherwise specified. SPX2730/31/32/33 PARAMETER CONDITIONS Typ
Min Max 3.3V Version
Units
V
Output Voltage (Note 2)
5.0V Version
IOUT = 10mA 10mA IOUT 3A, 4.75VVIN 16V IOUT = 10mA 10mA IOUT 3A, 5.5VVIN 16V
3.3 3.3 5.0 5.0 1.240
3.270 3.240 4.95 4.90 1.228 1.215 1.203
3.330 3.360 5.05 5.10 1.252 1.265 1.277 0.5 1 100 175
Output Voltage (Note 2)
All Voltage Options
V
Reference Voltage Reference Voltage Line Regulation Load Regulation V T Dropout Voltage
(Note 8) IO = 10mA, (VOUT + 1V) VIN 16V VIN = VOUT + 5V, 10mA IOUT IFULLLOAD (Note 2, 6) Output Voltage (Note 6) Temperature Coef.
V V % % ppm/C mV
0.06 0.2 20 80 250 370 10 37 0.9 4.5 400 260 40 3.0
IO = 100mA IO = 1.5A IO = 3A
600 35 mA mA A V RMS
Ground Current IGNDDO Ground Pin Current at Dropout Current Limit Output Noise Voltage (10Hz to 100kHz) IL = 100mA Adjust Pin Bias Current Reference Voltage Temperature Coefficient Adjust Pin Bias Current Temperature Coefficient Output Leakage Current Output Low Voltage
IO = 1.5A, VIN = VOUT, +1V IO = 3A
VIN = 0.5V less than specified VOUT IOUT = 10mA VOUT = 0V (Note 4) CL = 10F CL = 33F
80 120
nA ppm/C
(Note 7)
20
0.1
nA/C
Flag Output (Error Comparator) SPX2731/SPX2733 VOH = 16V Device set for 5V. VIN = 4.5V IOL = 250A 0.01 220 1.00 2.00 300 400 A mV
Rev. 12/7/00
SPX2730/31/32/33
(Cont.)
Upper Threshold Voltage Lower Threshold Voltage Hysteresis ENABLE Input SPX2731/SPX2732 Input Logic Voltage Low (OFF) High (ON) Enable Pin Input Current Regulator Output Current in Shutdown
Device set for 5V (Note 9) Device set for 5V (Note 9) Device set for 5V (Note 9)
60 75 15
40 25 95 140
mV mV mV
0.8 2.4 VEN = 16V VEN = 0.8V (Note 10) 10 500 100 600 750 1 2
V V A A
Notes: The Bold specifications apply to the full operating temperature range. Note 1: Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle.) The maximum continuous supply voltage is 16V. Note 2: Full load current (IFL) is defined as 1.5A for the Note 3: Dropout voltage is defined as the input-to output differential when the output voltage drops to 99% of its nominal value with VOUT + 1V applied to VIN. Note 4: VIN = VOUT (NOMINAL) +1V. For example, use VIN= 4.3V for a3.3V regulator. Employ pulse-testing procedures to minimize temperature rise. Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current to the ground current. Note 6: Output voltage temperature coefficient is defined as the worst case voltage changed divided by the total temperature range. Note 7: Thermal regulation is defined as the change in the output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 200mA load pulse as VIN = 20V (a 4W pulse) for T = 10ms. Note 8: VREF VOUT (VIN - 1), 2.3V VIN 16V, 10mA < IL IFL, TJ TJMAX Note 9: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured a 6V input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain = VOUT/VREF = (R1 + R2)R2. For example, at a programmable output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95mVx 5V/ 1.240V = 38mV. Threshold remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.7% guaranteed. Note 10: VEN 0.8V and VIN 16V, VOUT = 0.
Rev. 12/7/00
SPX2730/31/32/33
APPLICATION HINTS
The SPX2730/31/32/33 incorporates protection against overcurrent faults, reversed load insertion, over temperature operation, and positive and negative transient voltage. However, the use of an output capacitor is required in order to insure the stability and the performances. Thermal Consideration Although the SPX2730/31/32/33 offers limiting circuitry for overload conditions, it is necessary not to exceed the maximum junction temperature, and therefore to be careful about thermal resistance. The heat flow will follow the lowest resistance path, which is the Junction-to-case thermal resistance. In order to insure the best thermal flow of the component, a proper mounting is required. Note that the case of the device is electrically connected to the output. The case has to be electrically isolated, a thermally conductive spacer can be used. However do not forget to consider its contribution to thermal resistance. Assuming: VIN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 50C/W, Heatsink Case= 6C/W, Heatsink Case = 0.5C/W, JC = 3C/W Power dissipation under this condition PD = (VIN - VOUT) * IOUT = 7.5W Junction Temperature TJ = TA + PD * (Case - HS + HS JC) For the Control Section TJ = 50 + 7.5*(0.5 + 6=3) = 121.25C 121.25C < TJ (max) for the Control & Power Sections. In both case reliable operation is insured by adequate junction temperature. Capacitor Requirements The output capacitor is needed for stability and to minimize the output noise. The required value of the capacitor varies with the load. However, a minimum value of 10F Aluminum will guarantee stability over load. A tantalum capacitor is recommended for a fast load transient response If the power source has high AC impedance, a 0.1F capacitor between input & ground is recommended. This capacitor should have good characteristics up to 250 kHz. Minimum Load Current To ensure a proper behavior of the regulator at light load, a minimum load of 10mA for SPX2730/31/32/33 is required.
VIN
Adjustable Regulator Design SPX2732/33are adjustable regulators and maybe programmed for any value between 1.25V and 16V using two resistors. The relation between the resistors is given by: R1=R2 (VOUT/1.240 -1) Resistors have a large value up to 1m in order to reduce the current consumption. This might be interesting in the case of widely varying load currents. Error Flag SPX2731/33 features an error indicating either an over current fault or a low input voltage. This flag pulls low when such a problem occurs and may sink 10mA. It is inoperative during thermal shutdown. Enable Input SPX2731/32 features enable input allowing turning ON & OFF the device. EN has been designed to be compatible with TTL/CMOS logic. When the regulator is ON, the current flowing through this pin is approximately 20A.
VIN
VOUT
SPX2730
Fig.1 Basic Fixed Output Regulator
4 1 2 SPX2732/33 5 3
VOUT R1
VOUT = VREF X [ 1 + (R1 /R2 ) ] For best results, the total series resistance should be small enough to pass the minimum regulator load current
R2
Fig. 2 Adjustable Output Voltage Regulator
Rev. 12/7/00
SPX2730/31/32/33
PACKAGE DRAWING TO-263-3L (T)
0.176 0.005 (4.470 0.127) 0.050 0.002 (1.270 0.051)
0.405 0.005 (10.287 0.127)
0.055 (1.397)
0.356 0.005 (9.042 0.127) 0.600 + 0.025 (15.24 0.635)
0.103 BSC (2.616)
0.050 (1.270) 0.032 + 0.001 (0.813 + 0.025) -
0.015 (0.381
+ + -
0 8 0.003 0.074)
0.100 (2.540

0.010 0.254)
Rev. 12/7/00
SPX2730/31/32/33
PACKAGE DRAWING 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 + 0.003 (0.381 + 0.074) 0 8
Rev. 12/7/00
SPX2730/31/32/33
PACKAGE DRAWING 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) 7o Typ. 0.540 0.015 (13.720 0.381) 0.410 (10.41)
1.020 0.015 (25.910 0.381)
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. 12/7/00
SPX2730/31/32/33
PACKAGE DRAWING 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 + 0.005 (1.70 + 0.127) 0.268 REF (6.81 REF)
0.032 (0.81
+ 0.005 + 0.13) 0.015 (0.38 + 0.005 + 0.13) -
0.105 + 0.005 (2.67 + 0.13) -
0.268 REF
Rev. 12/7/00
SPX2730/31/32/33
ORDERING INFORMATION Ordering No.
SPX2730U-3.3 SPX2730U-5.0 SPX2730T-3.3 SPX2730T-5.0 SPX2731U-3.3 SPX2731U-5.0 SPX2731T-3.3 SPX2731T-5.0 SPX2732U SPX2732U-3.3 SPX2732U-5.0 SPX2732T SPX2732T-3.3 SPX2732T-5.0 SPX2733U SPX2733U-3.3 SPX2733U-5.0 SPX2733T SPX2733T-3.3 SPX2733T-5.0
Output Voltages
3.3V 5.0V 3.3V 5.0V 3.3V 5.0V 3.3V 5.0V Adj 3.3V 5.0V Adj 3.3V 5.0V Adj 3.3V 5.0V Adj 3.3V 5.0V
Packages
3 Lead TO-220 3 Lead TO-220 3 Lead TO-263 3 Lead TO-263 3 Lead TO-220 3 Lead TO-220 3 Lead TO-263 3 Lead TO-263 5 Lead TO-220 3 Lead TO-220 3 Lead TO-220 5 Lead TO-263 3 Lead TO-263 3 Lead TO-263 5 Lead TO-220 3 Lead TO-220 3 Lead TO-220 5 Lead TO-263 3 Lead TO-263 3 Lead TO-263
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. 12/7/00

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