SPX2730/31/32/33 3A High Current Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response (ADVANCED INFORMATION) FEATURES APPLICATIONS • 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) • 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) SPX2730 SPX2731/32/33 1 2 3 1 2 3 4 5 SPX2731 Top View SPX2733 1) ENABLE 1) FLAG 2) INPUT 3) GND 2) INPUT 3) GND 2) INPUT 3) GND 4) OUTPUT 4) OUTPUT 5) ADJUST 4) OUTPUT 5) ADJUST 5) FLAG Top View SPX2732 1) ENABLE SPX2730 1 2 3 Front View TO-220-5 (U) SPX2731/32/33 1 2 3 4 5 SPX2731 SPX2733 SPX2732 1) ENABLE 1) ENABLE 1) FLAG 2) INPUT 3) GND 2) INPUT 3) GND 2) INPUT 3) GND 4) OUTPUT 4) OUTPUT 5) FLAG 5) ADJUST 4) OUTPUT 5) ADJUST Front View Rev. 12/7/00 SPX2730/31/32/33 ABSOLUTE MAXIMUM RATINGS Lead Temp. (Soldering, 5 Seconds) ................................ 260°C Maximum Input Voltage ...................................... 16V Storage Temperature Range ...................................................... -65° to +150°C Operating Junction Temperature Range SPX2730/31/32/33 Control Section ................................ -45°C +125°C SPX2730/31/32/33 Power Transistor............................... -45°C +150°C ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 10mA, Ta=25°C, unless otherwise specified. SPX2730/31/32/33 PARAMETER CONDITIONS Typ Min Max Units 3.3V Version IOUT = 10mA 10mA ≤IOUT≤ 3A, 4.75V≤VIN ≤16V 3.3 3.3 3.270 3.240 3.330 3.360 V IOUT = 10mA 10mA ≤IOUT≤ 3A, 5.5V≤VIN ≤16V 5.0 5.0 4.95 4.90 5.05 5.10 V 1.240 1.228 1.215 1.203 V 0.06 0.2 1.252 1.265 1.277 0.5 1 V % % 20 100 ppm/°C IO = 100mA 80 175 mV IO = 1.5A 250 IO = 3A 370 600 Ground Current IO = 1.5A, VIN = VOUT, +1V IO = 3A 10 37 35 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 VIN = 0.5V less than specified VOUT IOUT = 10mA 0.9 VOUT = 0V (Note 4) 4.5 CL = 10µF 400 CL = 33µF 260 Output Voltage (Note 2) 5.0V Version Output Voltage (Note 2) All Voltage Options 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. 40 (Note 7) mA mA 3.0 A V RMS 80 120 nA 20 ppm/°C 0.1 nA/°C Flag Output (Error Comparator) SPX2731/SPX2733 Output Leakage Current Output Low Voltage VOH = 16V 0.01 Device set for 5V. VIN = 4.5V IOL = 250µA 220 1.00 2.00 300 400 µA 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 Device set for 5V (Note 9) 60 Device set for 5V (Note 9) 75 Device set for 5V (Note 9) 15 Regulator Output Current in Shutdown (Note 10) 40 25 mV 95 140 mV mV 0.8 V 600 750 1 2 V 2.4 VEN = 16V 100 VEN = 0.8V 10 500 µA µA 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 = 50°C/W, θHeatsink Case= 6°C/W, θHeatsink Case = 0.5°C/W, θ JC = 3°C/W 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 1mΩ 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 20µA. VIN Power dissipation under this condition PD = (VIN – VOUT) * IOUT = 7.5W Junction Temperature TJ = TA + PD * (θCase – HS + θ HS θ JC) VOUT SPX2730 Fig.1 Basic Fixed Output Regulator For the Control Section TJ = 50 + 7.5*(0.5 + 6=3) = 121.25°C 121.25°C < 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 10µF 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 0.1µF capacitor between input & ground is recommended. This capacitor should have good characteristics up to 250 kHz. VIN 4 1 2 SPX2732/33 5 3 VOUT = VREF X [ 1 + (R1 /R2 ) ] VOUT R1 R2 For best results, the total series resistance should be small enough to pass the minimum regulator load current Fig. 2 Adjustable Output Voltage Regulator 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. Rev. 12/7/00 SPX2730/31/32/33 PACKAGE DRAWING TO-263-3L (T) 0.405 ± 0.005 (10.287 ± 0.127) 0.176± 0.005 (4.470 ± 0.127) 0.050 ± 0.002 (1.270 ± 0.051) 0.055 (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) 0.176 ± 0.005 (4.470 ± 0.127) 0.050 ± 0.002 (1.270 ± 0.051) 0.405 ± 0.005 (10.287 ± 0.127) 0.356 ± 0.005 (9.042 ± 0.127) 0.600 ± 0.025 (15.24 ± 0.635) 0.067 ± 0.005 (1.702 ± 0.127) 0.032 ± 0.003 (0.813 ± 0.076) 0.100 ± 0.010 (2.540 ± 0.254) 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) 0.180 ± 0.005 (4.572 ± 0.127) 0.408 ± 0.013 (10.36 ± 0.33) 0.110 ± 0.010 (2.794 ± 0.254) 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 1.020 ± 0.015 (25.910 ± 0.381) 0.150 MIN (3.81 MIN) 7o Typ. 0.540 ± 0.015 (13.720 ± 0.381) 0.050 TYP (1.27 TYP) 0.200 ± 0.010 (5.080 ± 0.254) 0.410 (10.41) 0.015 ± 0.010/-0.015 (2.667± 0.254/-0.381) 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) Rev. 12/7/00 SPX2730/31/32/33 PACKAGE DRAWING TO-220-5L (U) 0.150 D +- 0.005 (3.81D + - 0.13) 0.175 + - 0.005 (4.45 +- 0.13) 0.400 + - 0.005 (10.16+- 0.13) 0.050 +- 0.005 (1.27 +- 0.13) 0.108 + - 0.005 (2.74 +- 2.74) 0.250 + - 0.005 (6.35 + - 0.13) 0.590 +- 0.005 (14.99 +- 0.13) SEATING PLANE 1.137 REF (28.88 REF) 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 7° Typ. 0.105 +- 0.005 (2.67 +- 0.13) +- 0.005 +- 0.13) 0.268 REF 0.015 (0.38 + - 0.005 +- 0.13) 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 Packages 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 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: [email protected] 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