SPX2730 SIPEX | Alldatasheet
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Rev. 12/7/00 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 • Powering VGA & Sound Card
- 1% output accuracy @ 3.3V, 5.0V • Power PCSupplies
- Output Current of 3A • SMPS Post-Regulator
- Low Dropout Voltage 370mV(Typ.) @ 3A. • High Efficiency “Green” Computer Systems
- Extremely Tight Load And Line Regulation • High Efficiency Linear Power Supplies
- Extremely Fast Transient Response • Portable Instrumentation
- Standard 3-Terminal Low Cost TO-220, TO-263 • Constant Current Regulators
- Reverse-battery and “Load Dump” Protection • Adjustable Power Supplies
- Zero Current Shutdown Mode (5-Pin Versions) • Battery charger
- Error Flag Signal Output Out-of Regulation (5-Pin Versions) 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 exce llent 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 Top View TO-263-3 (T) SPX2730 2 3 TO-263-5 (T) Top View SPX2731/32/33 12 3 Front View TO-220-3 (U) SPX2730 1 23 TO-220-5 (U) Front View 54321 SPX2731/32/33SPX2731 SPX2732 SPX2733 1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) FLAG 1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) ADJUST 1) FLAG 2) INPUT 3) GND 4) OUTPUT 5) ADJUST SPX2731 SPX2732 SPX2733 1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) FLAG 1) ENABLE 2) INPUT 3) GND 4) OUTPUT 5) ADJUST 1) FLAG 2) INPUT 3) GND 4) OUTPUT 5) ADJUST
Rev. 12/7/00 SPX2730/31/32/33 ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature Range ELECTRICAL CHARACTERISTICS (NOTE 1) at IOUT = 10mA, Ta=25°C, unless otherwise specified. PARAMETER CONDITIONS Typ SPX2730/31/32/33 Min Max Units 3.3V Version Output Voltage (Note 2) IOUT = 10mA 10mA ≤IOUT≤ 3A, 4.75V≤VIN ≤16V 3.3 3.3 3.270 3.240 3.330 3.360 V 5.0V Version Output Voltage (Note 2) IOUT = 10mA 10mA ≤IOUT≤ 3A, 5.5V≤VIN ≤16V 5.0 5.0 4.95 4.90 5.05 5.10 V All Voltage Options Reference Voltage 1.240 1.228 1.215 1.252 1.265 V Reference Voltage (Note 8)\` 1.203 1.277 V Line Regulation IO = 10mA, (VOUT + 1V) ≤ VIN≤ 16V 0.06 0.5 % Load Regulation VIN = VOUT + 5V, 10mA ≤ IOUT≤ IFULLLOAD (Note 2, 6) 0.2 1 % ∆V 20 100 ppm/°C Output Voltage (Note 6) Temperature Coef. IO = 100mA 80 175 IO = 1.5A 250 Dropout Voltage IO = 3A 370 600 mV Ground Current I O = 1.5A, VIN = VOUT, +1V IO = 3A 35 mA IGNDDO Ground Pin Current at Dropout VIN = 0.5V less than specified VOUT IOUT = 10mA 0.9 mA Current Limit VOUT = 0V (Note 4) 4.5 3.0 A Output Noise Voltage (10Hz to 100kHz) IL = 100mA CL = 10µF CL = 33µF 400 260 V RMS Adjust Pin Bias Current 40 80 120 nA Reference Voltage Temperature Coefficient (Note 7) 20 ppm/°C Adjust Pin Bias Current Temperature Coefficient 0.1 nA/°C Flag Output (Error Comparator) SPX2731/SPX2733 Output Leakage Current VOH = 16V 0.01 1.00 2.00 µA Output Low Voltage Device set for 5V. VIN = 4.5V IOL = 250µA 220 300 400 mV
Rev. 12/7/00 SPX2730/31/32/33 (Cont.) Upper Threshold Voltage Device set for 5V (Note 9) 60 40 mV Lower Threshold Voltage Device set for 5V (Note 9) 75 95 140 mV Hysteresis Device set for 5V (Note 9) 15 mV ENABLE Input SPX2731/SPX2732 Input Logic Voltage Low (OFF) High (ON) 2.4 0.8 V VEN = 16V 100 600 750 V Enable Pin Input Current VEN = 0.8V 1 µA Regulator Output Current in Shutdown (Note 10) 10 500 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 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 a pplied, 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 referenc e voltage measured a 6V input. To express these thresholds in terms of output voltage change, multiply the error amplifier gain = V OUT/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 over- current 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 SPX 2730/31/32/33 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 Power dissipation under this condition P D = (VIN – VOUT) * IOUT = 7.5W Junction Temperature T J = TA + PD * (θCase – HS + θ HS θ JC) For the Control Section 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 10 µF 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 0.1 µF 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. 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: R 1=R2 (VOUT/1.240 –1) Resistors have a large value up to 1m Ω 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. SPX2730 Fig.1 Basic Fixed Output Regulator VOUTVIN SPX2732/33 Fig. 2 Adjustable Output Voltage Regulator VOUTVIN For best results, the total series resistance should be small enough to pass the minimum regulator load current VOUT = VREF X [ 1 + (R1/R2) ]
Rev. 12/7/00 SPX2730/31/32/33 PACKAGE DRAWING TO-263-3L (T) 0.103 BSC 0.050 (1.270) 0.600 +- 0.025 0.405 0.005 0.055 (1.397) (10.287 0.127) 0.356 0.005 (9.042 0.127) (15.24 0.635)± (0.813 0.025)+- 0.176 0.005 0.050 0.002 0.015 +- 0.003 0° 8° (0.381 0.074)+- 0.100 0.010 (2.540 0.254) (4.470 0.127)± (1.270 0.051)±
Rev. 12/7/00 SPX2730/31/32/33 PACKAGE DRAWING TO-263-5L (T) 0.405 0.005 0.055 (1.397) 0.356 0.005 (10.287 ± 0.127) (9.042 0.127)± (15.24 0.635)± 0.600 0.025± (1.702 0.127)± 0.067 0.005± (0.813 0.076)± 0.032 0.003± 0.015 +- 0.003 0° 8° (0.381 0.074)+- 0.100 0.010 (2.540 0.254)
Rev. 12/7/00 SPX2730/31/32/33 PACKAGE DRAWING TO-220-3L (U) 0.408 ± 0.013 (10.36 ± 0.33) 0.110 ± 0.010 (6.350 ± 0.254) 0.151D ± 0.002 (3.835 D ± 0.051) 0.180 ± 0.005 (4.572 ± 0.127) 0.050 ± 0.002 (1.270 ± 0.051) 0.340 ± 0.010 (8.636 ± 0.254)
0.150 MIN
(3.81 MIN) 0.410 (10.41) 0.100 ± 0.010 (2.540 ± 0.254) 0.032 ± 0.005 (0.813 ± 0.127) 0.540 ± 0.015 (13.720 ± 0.381)
0.050 TYP
(1.27 TYP) 0.200 ± 0.010 1.020 ± 0.015 (25.910 ± 0.381) SEATING PLANE Tapered 1o
2 Sides
7o Typ.
Rev. 12/7/00 SPX2730/31/32/33 PACKAGE DRAWING TO-220-5L (U) 0.108 +- 0.005 (2.74 +- 2.74) 0.400 +- 0.005 (10.16+- 0.13) 0.150 D +- 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 0.547 +- 0.005 (13.89 +- 0.005) 0.067 +- 0.005 (1.70 +- 0.127)
0.268 REF
(6.81 REF) 0.268 REF 0.032 +- 0.005 (0.81 +- 0.13) 0.015 +- 0.005 (0.38 +- 0.13) 0.105 +- 0.005 (2.67 +- 0.13)
1.137 REF
(28.88 REF) Typ.
Rev. 12/7/00 SPX2730/31/32/33
ORDERING INFORMATION
Ordering No. Output Voltages Packages SPX2730U-3.3 3.3V 3 Lead TO-220 SPX2730U-5.0 5.0V 3 Lead TO-220 SPX2730T-3.3 3.3V 3 Lead TO-263 SPX2730T-5.0 5.0V 3 Lead TO-263 SPX2731U-3.3 3.3V 3 Lead TO-220 SPX2731U-5.0 5.0V 3 Lead TO-220 SPX2731T-3.3 3.3V 3 Lead TO-263 SPX2731T-5.0 5.0V 3 Lead TO-263 SPX2732U Adj 5 Lead TO-220 SPX2732U-3.3 3.3V 3 Lead TO-220 SPX2732U-5.0 5.0V 3 Lead TO-220 SPX2732T Adj 5 Lead TO-263 SPX2732T-3.3 3.3V 3 Lead TO-263 SPX2732T-5.0 5.0V 3 Lead TO-263 SPX2733U Adj 5 Lead TO-220 SPX2733U-3.3 3.3V 3 Lead TO-220 SPX2733U-5.0 5.0V 3 Lead TO-220 SPX2733T Adj 5 Lead TO-263 SPX2733T-3.3 3.3V 3 Lead TO-263 SPX2733T-5.0 5.0V 3 Lead TO-263 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 liab ility 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. Corporation