SPX29150

SPX29150/51/52/53 1.5A Low Dropout Voltage Regulator FEATURES ■ Adjustable Output Down to 1.25V ■ 1% Output Accuracy ■ Output Current of 1.5A ■ Low Dropout Voltage of 390mV @ 1.5A ■ Extremely Tight Load and Line Regulation ■ Extremely Fast Transient Response ■ Reverse-Battery Protection ■ Zero Current Shutdown (5 pin version) ■ Error Flag Signal Output for Out of Regulation State (5 pin version) ■ Standard TO-220 and TO-263 Packages APPLICATIONS ■ Powering VGA and Sound Cards ■ LCD Monitors ■ USB Power Supplies ■ PowerPC™ Supplies ■ SMPS Post Regulators ■ High-efficiency “Green” Computer Systems ■ High-efficiency Linear Power Supplies ■ Portable Instrumentation ■ Constant Current Regulators ■ Adjustable Power Supplies ■ Battery Chargers DESCRIPTION The SPX29150/51/52/53 are 1.5A, highly accurate voltage regulators with a low dropout voltage of 390mV (typical) @ 1.5A. These regulators are specifically designed for low voltage applications that require a low dropout voltage and a fast transient response. They are fully fault protected against over-current, reverse battery, and positive and negative voltage transients. On-chip trimming adjusts the reference voltage to 1% initial accuracy. Other features in the 5 pin versions include Enable and Error Flag. The SPX29150/51/52/53 is offered in 3-pin and 5-pin TO-220 & TO-263 packages. For a 3A version, refer to the SPX29300 data sheet. TYPICAL APPLICATION CIRCUITS VIN + 6.8µ F 1 SPX29150 3 2 + 10µ F VOUT VIN + 6.8µ F 1 SPX29152 4 2 GND R2 3 5 ADJ VOUT + R1 10µ F Figure 1. Fixed Output Linear Regulator REV B 06/05/08 Figure 2. Adjustable Output Linear Regulator © Copyright 2008 Exar Corporation SP29150/51/52/53 1.5A Low Dropout Voltage Regulator 1 ABSOLUTE MAXIMUM RATINGS Storage Temperature Range........................-65°C to +150°C Operating Junction Temperature Range......-40°C to +125°C Input Voltage (Note 7)...................................................... 16V at VIN=VOUT + 1V and IOUT = 10mA, CIN = 6.8µF, COUT = 10µF, TA = 25°C, unless otherwise specified. The Boldface applies over the junction temperature range. Adjustable versions are set to 5.0V. SPX29150/51 PARAMETER CONDITIONS Typ Units Min Max 1.8V Version IOUT = 10mA 1.8 1.782 1.818 Output Voltage V 10mA ≤ IOUT ≤ 1.5A, 2.5V ≤ VIN ≤ 16V 1.8 1.764 1.836 2.5V Version IOUT = 10mA 2.5 2.475 2.525 Output Voltage V 10mA ≤IOUT≤1.5A, 3.5V≤VIN ≤16V I 3.5V≤V 16V ≤V V 2.5 2.450 2.550 3.3V Version IOUT = 10mA 3.3 3.267 3.333 Output Voltage V 10mA ≤IOUT≤1.5A, 4.3V≤VIN ≤16V I 4.3V≤V 16V ≤V V 3.3 3.234 3.366 5.0V Version IOUT = 10mA 5.0 4.950 5.050 Output Voltage V 10mA ≤IOUT≤1.5A, 6.0V≤VIN ≤16V I 6.0V≤V 16V ≤V V 5.0 4.900 5.100 All Voltage Options SPX29150/51/52/53 Line Regulation IO = 10mA, (VOUT + 1V) ≤ VIN ≤ 16V V 16V 0.1 0.5 % VIN = VOUT + 1V, 10mA ≤ IOUT≤ IFULLLoad Regulation 0.2 1 % LOAD ELECTRICAL CHARACTERISTICS ∆V ∆T Dropout Voltage (Note 1) (except 1.8V version) Ground Current (Note 3) IGNDDO Ground Pin Current at Dropout Current Limit Output Noise Voltage (10Hz to 100kHz) IL = 100mA Reference Voltage Output Voltage Temperature Coefficient IO = 100mA IO = 750mA IO = 1.5A IO = 750mA, VIN = VOUT, +1V IO = 1.5A VIN = 0.1V less than specified VOUT IOUT = 10mA VOUT = 0.0V (Note 2) CL = 10µF CL = 33µF Adjustable version only 13 70 230 390 12 45 0.9 2.2 400 260 1.240 1.228 1.215 1.203 1.7 100 200 ppm/°C mV 600 25 mA mA A µVRMS 1.252 1.265 1.277 80 120 V Reference Voltage Adjustable version only (Note 8) Adjust Pin Bias Current Reference Voltage Temperature (Note 4) Coefficient Adjust Pin Bias Current Temperature Coefficient Flag Output (Error Comparator) SPX29151/53 Output Leakage Current Output Low Voltage Rev B 06/05/08 40 13 nA ppm/°C 0.1 nA/°C VOH=16V Device set for 5V, VIN=4.5V, IOL=250µA 0.1 200 1.00 2.00 300 400 UA mV SP29150/51/52/53 1.5A Low Dropout Voltage Regulator © Copyright 2008 Exar Corporation 2 ELECTRICAL CHARACTERISTICS CONT'D PARAMETER Upper Threshold Voltage Lower Threshold Voltage Hysteresis ENABLE input SPX29151/52 Input Logic Voltage Low (OFF) High (ON) Enable Input Pin Input Current VIN < 10V VEN=16V VEN=0.8V Regulator Output Current in Shutdown (Note 6) TO-220 Junction to Case, at Tab TO-220 Junction to Ambient Thermal Resistance TO-263 Junction to Case, at Tab TO-263 Junction to Ambient 100 CONDITIONS Device set for 5V (Note 5) Device set for 5V (Note 5) Device set for 5V (Note 5) Typ 60 75 15 SPX29150/51 Min Max 40 25 95 140 Units mV mV mV 2.4V 0.8 600 750 1 2 V µA µA µA 10 3 30 3 32 500 °C/W NOTES: Note 1: Dropout voltage is defined as the input to output differential when the output voltage drops to 99% of its nominal value. Note 2: VIN = VOUT (NOMINAL) +1V. For example, use VIN = 4.3V for a 3.3V regulator. Employ pulse-testing procedures to minimize temperature rise. Note 3: 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 4: 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. Note 5: Comparator threshold is expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured 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. Thresholds 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 6: VEN ≤ 0.8V and VIN ≤ 16V, VOUT = 0. Note 7: Maximum positive supply voltage of 20V must be of limited duration (