GM6603-1.8TC3R

GM6603 3.0A PRECISION LINEAR REGULATORS P ower Management Description The GM6603 series of positive adjustable and fixed regulators are designed to provide 3.0A output with low dropout voltage performance. On-chip trimming adjusts the reference voltage to 2.0%. Put them to work in post regulators or microprocessor power supplies where low voltage operation and fast transient response are required. Device includes over-current protection and thermal shutdown protection as well. Pin-to-pin compatible with the LT1085 family of regulators, the GM6603's are available in TO-252, TO-220 and surface-mount TO-263 packages. Features Adjustable or Fixed Output Output Current of 3.0A Dropout Voltage (typical) 1.3V @ 3.0A Typical Line Regulation 0.015% Typical Load Regulation 0.05% Fast Transient Response Current Limit Protection Thermal Shutdown Protection Application Microprocessor Supply Post Regulators for Switching Supplies Printer Supplies Motherboards Telecommunication Systems T YPICAL APPLICATION CIRCUITS (Adjustable Version) (Fixed Version) VOUT= 3.45V VIN> 4.75V 3 VIN ADJ VOUT 2 R1 133W 1.0% R2 232W 1.0% VIN> 4.75V 3 VOUT= 3.3V GND + 1 C1 10µF Tant + C2 10µF Tant. Min + 1 C1 10µF Tant + C2 10µF Tant. Min VOUT= VREF X (1 + R2 ) + IADJ X R2 R1 Notes: 1 . C1 needed if device is far from filter capacitors 2. C2 minimum value required for stability www.gammamicro.com PRELIMINARY GM6603 1 Revision 1, Jun. 2004 GM6603-Adj GM6603-3.3 VOUT 2 VIN GM6603 MARKING INFORMATION & PIN CONFIGURATIONS(Top View) TO-252(DPAK) TO-220 TO-263-2 (D PAK) 2 GM6603 VVAYWW GM6603 GM6603 VVAYWW VVAYWW VIN VOUT ADJ/GND* VOUT V V, V = Output Voltage(A =Ad j ,33 = 3.3V) A = Assembly Location Y = Year W W = Work Week VIN VOUT VIN ADJ/GND* ADJ/GND* On fixed versions Pin 1 = GND, on adjustable versions Pin 1 = ADJ Tab = VOUT ORDERING INFORMATION Ordering Number GM6603-ATA3T GM6603-ATA3R GM6603-ATC3T GM6603-ATC3R GM6603-ATB3T GM6603-1.5TA3T GM6603-1.5TA3R GM6603-1.5TB3T GM6603-1.8TA3T GM6603-1.8TA3R GM6603-1.8TC3T GM6603-1.8TC3R GM6603-1.8TB3T GM6603-2.5TA3T GM6603-2.5TA3R GM6603-2.5TB3T GM6603-2.85TA3T GM6603-2.85TA3R Output Voltage Adj Adj Adj Adj Adj 1.5 1.5 1.5 1.8 1.8 1.8 1.8 1.8 2.5 2.5 2.5 2.85 2.85 2.85 3.0 3.0 3.0 3.0 3.0 Package TO-263-2 TO-263-2 T O-252 TO-252 TO-220 TO-263-2 TO-263-2 TO-220 TO-263-2 TO-263-2 TO-252 TO-252 TO-220 TO-263-2 TO-263-2 TO-220 TO-263-2 TO-263-2 TO-220 TO-263-2 TO-263-2 TO-252 TO-252 TO-220 Shipping 50 Units/ Tube 800 Units / Tape &Reel 80 Units / Tube 2,500 Units / Tape & Reel 50 Units / Tube 50 Units/ Tube 800 Units / Tape &Reel 50 Units / Tube 50 Units/ Tube 800 Units / Tape &Reel 80 Units / Tube 2,500 Units / Tape & Reel 50 Units / Tube 50 Units/ Tube 800 Units / Tape &Reel 50 Units / Tube 50 Units/ Tube 800 Units / Tape &Reel 50 Units / Tube 50 Units/ Tube 800 Units / Tape &Reel 80 Units / Tube 2,500 Units / Tape & Reel 50 Units / Tube GM6603 2 GM6603-2.85TB3T GM6603-3.0TA3T GM6603-3.0TA3R GM6603-3.0TC3T GM6603-3.0TC3R GM6603-3.0TB3T * For detail Ordering Number identification, please see last page. GM6603 ORDERING INFORMATION (Continued) Ordering Number GM6603-3.3TA3T GM6603-3.3TA3R GM6603-3.3TC3T GM6603-3.3TC3R GM6603-3.3TB3T GM6603-5.0TA3T GM6603-5.0TA3R GM6603-5.0TC3T GM6603-5.0TC3R GM6603-5.0TB3T Output Voltage 3.3 3.3 3.3 3.3 3.3 5.0 5.0 5.0 5.0 5.0 Package TO-263-2 TO-263-2 T O-252 TO-252 TO-220 TO-263-2 TO-263-2 TO-252 TO-252 TO-220 Shipping 50 Units/ Tube 800 Units / Tape &Reel 80 Units / Tube 2,500 Units / Tape & Reel 50 Units / Tube 50 Units/ Tube 800 Units / Tape &Reel 80 Units / Tube 2,500 Units / Tape & Reel 50 Units / Tube * For detail Ordering Number identification, please see last page. GM6603 3 GM6603 ABSOLUTE MAXIMUM RATINGS PARAMETER Power Dissipation Input Voltage Operating Junction Temperature Range Control Section Power Transistor Lead Temperature(Soldering, 10sec) SYMBOL PD VIN TJ TLEAD TSTG ESD VALUE Internally limited 7.0 UNIT W V 0 to 125 0 to 150 300 -65 to + 150 2.0 °C °C °C KV Storage Temperature Range ESD Damage Threshold BLOCK DIAGRAM (Adjustable Version) VIN Output Current Limit VOUT Thermal Shutdown Bandgap Reference + Error Amplifier ADJ (Fixed Version) VIN Output Current Limit VOUT GM6603 Thermal Shutdown Bandgap Reference + Error Amplifier GND 4 GM6603 ELECTRICAL CHARACTERISTICS (Typicals and limits appearing in normal type apply for TJ = 25°C) Parameter Reference Voltage GM6603-Adj GM6603-1.8 GM6603-2.5 Output Voltage GM6603-3.3 GM6603-5.0 GM6603-Adj GM6603-1.8 Line Regulation GM6603-2.5 GM6603-3.3 GM6603-5.0 GM6603-Adj GM6603-1.8 Load Regulation GM6603-2.5 GM6603-3.3 GM6603-5.0 Dropout Voltage Current Limit Minimum Load Current GM6603-Adj GM6603-1.8 GM6603-2.5 Quiescent Current GM6603-3.3 GM6603-5.0 Adjust Pin Current Temperature Coefficient Thermal Regulation Ripple Rejection RA GM6603-Adj IADJ TC IQ VD ICL IO MIN REGLOAD REGLINE VO Symbol VREF Condition IOUT=10mA, VIN-VOUT=1.5V 10mA IOUT 3A, 3.3V VIN 7V IOUT=10mA, VIN=3.3V 10mA IOUT 3A, 3.3V VIN 7V IOUT=10mA, VIN=4V 10mA IOUT 3A, 4V VIN 7V IOUT=10mA, VIN=4.8V 10mA IOUT 3A, 4.8V VIN 7V IOUT=10mA, VIN=6.5V 10mA IOUT 3A, 6.5V VIN 7V IOUT=10mA, IOUT=10mA, 3.3V IOUT=10mA, 4V IOUT=10mA, 4.8V IOUT=10mA, 6.5V VIN VIN VIN VIN 7V 7V 7V 7V 3A Min 1.238 1.230 1.782 1.764 2.475 2.450 3.267 3.234 4.950 4.900 Typ 1.250 1.250 1.800 1.800 2.500 2.500 3.300 3.300 5.000 5.000 0.04 0.04 0.04 0.04 0.04 0.2 0.2 0.2 0.2 0.2 1.15 Max 1.262 1.270 1.818 1.836 2.525 2.550 3.333 3.366 5.050 5.100 0.20 0.20 0.20 0.20 0.20 0.40 0.40 0.40 0.40 0.40 1.3 Unit V V V V V % VIN-VOUT=1.5V, 10mA IO VIN=3.8V, 10mA IO VIN=4.5V, 10mA IO VIN=5.3V, 10mA IO VIN=7V, 10mA IO 3A 3A 3A 3A % IOUT=3A VIN-VOUT=3V VIN=5V VIN=3.3V, 10mA IO VIN=4.0V, 10mA IO VIN=4.8V, 10mA IO VIN=6.5V, 10mA IO 3A 3A 3A 3A V A 3 4 1.7 5 5 5 5 5 10 10 mA mA 10 10 90 µA %/°C %/W dB IOUT=10mA, 2.65V VIN 7V 55 0.005 0.003 60 72 VIN-VOUT=1.5V, IOUT=10mA TA=25°C, 30ms pulse VIN-VOUT=1.5V, IOUT=3A GM6603 5 GM6603 APPLICATION INFORMATION The GM6603 series linear regulators provide fixed and adjustable output voltages at currents up to 3.0A. These regulators are protected against overcurrent conditions and include thermal shutdown protection. The GM6603's have a composite PNP-PN output transistor and require an output capacitor for stability. A detailed procedure for selecting this capacitor follows. Protection Diodes When large external capacitors are used with most linear regulator it is wise to add protection diodes. If the input voltage of the regulator is shorted, the output capacitor will discharge into the output of the regulator. The discharge current depends on the value of capacitor, output voltage and rate at which VIN drops. FIGURE 1 . Protection Diode Scheme for Large Output Capacitors (a),(b) Stability Considerations The output compensation capacitor helps to determine three main characteristics of a linear regulator's performance: start-up delay, load transient response, and loop stability. The capacitor value and type is based on cost, availability, size and temperature constraints. A tantalum or aluminum electrolytic capacitor is preferred, as a film or ceramic capacitor with almost zero ESR can cause instability. An aluminum electrolytic capacitor is the least expensive type, but when the circuit operates at low temperatures, both the value and ESR of the capacitor will vary widely. For optimum performance over the full operating temperature range, a tantalum capacitor is best. A 22µF tantalum capacitor will work fine in most applications, but with high current regulators such as the GM6603 higher capacitance values will improve the transient response and stability. Most applications for the GM6603's involve large changes in load current, so the output capacitor must supply instantaneous load current. The ESR of the output capacitor causes an immediate drop in output voltage given by: VIN (a) Fixed Version IN4002 VIN VOUT VOUT GM6603-3.3 C1 GND C2 (b) Adjustable Version IN4002 VIN VOUT VIN GM6603-Adj C1 ADJ R1 CADJ VOUT C2 R2 DV = DI x ESD In the GM6603 linear regulators, the discharge path GM6603 In microprocessor applications an output capacitor network of several tantalum and ceramic capacitors in parallel is commonly used. This reduces overall ESR and minimizes the instantaneous output voltage drop under transient load conditions. The output capacitor network should be placed as close to the load as possible for is through a large junction, and protection diodes are normally not needed. However, if the regulator is used with large output capacitance values and the input voltage is instantaneously shorted to ground, damage can occur. In this case, a diode connected as shown above in Figure 1. 6 GM6603 Output Voltage Sensing The GM6603 series are three terminal regulators, so they cannot provide true remote load sensing. Load regulation is limited by the resistance of the conductors connecting the regulator to the load. For best results the GM6603 should be connected as shown in Figure 2. VIN VIN VOUT RC Conductor Parasitic Resistance RLOAD The thermal characteristics of an IC depend four factors: 1. Maximum Ambient Temperature TA (°C) 2. Power Dissipation PD (Watts) 3. Maximum Junction Temperature TJ (°C) 4. Thermal Resistance Junction to ambient RQJA (°C/W) These relationship of these four factors is expressed by equation (1): TJ = TA + PD X RQJA Maximum ambient temperature and power dissipation are determined by the design while the maximum junction temperature and thermal resistance depend on the manufacturer and the package type. The maximum power dissipation for a regulator is expressed by equation (2): PD(max)={VIN(max)-VOUT(min)} IOUT(max) + VIN(max)IQ where: VIN(max) is the maximum input voltage, VOUT(min) is the minimum output voltage, IOUT(max) is the maximum output current IQ is the maximum quiescent current at IOUT(max). A heat sink effectively increases the surface area of the package to improve the flow of heat away from the IC into the air. Each material in the heat flow path between the IC and the environment has a thermal resistance. Like series electrical resistances, these resistances are summed to determine RQJA, the total thermal resistance between the junction and the air. This is expressed by equation (3): RQJA = RQJC + RQ CS + RQSA Where all of the following are in °C/W: RQJC is thermal resistance of junction to case, RQCS is thermal resistance of case to heat sink, RQSA is thermal resistance of heat sink to ambient air The value for RQJA is calculated using equation (3) and the result can be substituted in equation (1). The value for RQJC is 3.5°C/W for a given package type based on an average die size. For a high current regulator such as the GM6603 the majority of the heat is generated in the power transistor section. GM6603-3.3 GND (a) Fixed Version VIN VIN ADJ VOUT GM6603-A RC R1 R2 Conductor Parasitic Resistance RLOAD (b) Adjustable Version FIGURE 2 Conductor Parasitic Resistance Effects are Minimized by this Grounding Scheme For Fixed and Adjustable Output Regulators (a),(b) Calculating Power Dissipation and Heat Sink Requirements The GM6603 series precision linear regulators include thermal shutdown and current limit circuitry to protect the devices. However, high power regulators normally operate at high junction temperatures so it is important to calculate the power dissipation and junction temperatures accurately to be sure that you use and adequate heat sink. The case is connected to VOUT on the GM6603, so electrical isolation may be required for some applications. Thermal compound should always be used with high current regulators like the GM6603. GM6603 7 GM6603 T ypical Performance Characteristics 1.20 Reference Voltage Deviation(%) +0.3 TCASE= 0°C TCASE= 25°C +0.2 +0.1 0 -0.1 -0.2 -0.3 1.15 1.10 Dropout Voltage(V) 1.05 1.00 0.95 0.90 0.85 0.80 0.75 TCASE= 125°C 0 0.30 0.60 0.90 1.20 1.50 1.80 2.10 2.40 2.70 300 Qutput Current(A) 0 30 60 TJ°C 90 120 Figure 3. Dropout Voltage vs. Output Current Figure 4. Bandgap Reference Voltage Deviation vs. Temperature 90 80 70 Ripple Rejection(dB) Minimum Load Current(mA) 0.65 0.60 TCASE= 25°C 0.55 0.50 0.45 0.40 1 TCASE= 125°C TCASE= 0°C 60 50 40 30 20 10 101 102 103 104 Frequency(Hz) 105 106 2 3 4 5 6 7 8 VIN - VOUT(V) Figure 5. Ripple Rejection vs. Frequency Figure 6. Minimum Load Current vs. VIN - VOUT(V) GM6603 8 GM6603 TO-220 PACKAGE OUTLINE DIMENSIONS 9.90 ± 0.20 3.60 ± 0.20 1.30 ± 0.10 1.70 1.50 DP0.20 9.20 ± 0.20 3.70 ± 0.20 15.90 ± 0.20 4.60 8.70 2.80 ± 0.10 4.50 ± 0.20 8.0 +0.1 1.30 -0.05 7.0 8.40 1.46 1.00 45° 3.00 10.08 ± 0.30 1.27 ± 0.10 2.54 TYP (2.54 ± 0.20) 0.80 ± 0.10 1.52 ± 0.10 P 3° 3-R0.2 18.95 MAX 3° 0.9 7.0 3° 13.08 ± 0.20 0.50 -0.05 +0.1 2.40 ± 0.20 3° 3° 2 - R 0.3 Unit: mm 10.00 ± 0.20 TO-263-2 PACKAGE OUTLINE DIMENSIONS 9.90 ± 0.20 0.40 15° 1.20 3° 1.50 DP0.20 9.20 ± 0.20 4.50 ± 0.20 1.30 -0.05 +0.1 P ad Layout 0.63 17.02 0.33 8.38 0.10 ± 0.01 3° R0.30 2.40 ± 0.20 2.54 ± 0.10 0.50 -0.05 10.0 ± 0.20 7.0 4.0 0.04 1.016 +0.1 1.4 ± 0.20 1.27 ± 0.10 2.54 TYP (2.54 ± 0.20) ( 3° R 0.3 3° 0.90 R 0.45 7.2 9.20 ± 0.20 10.00 ± 0.20 4.90 ± 0.20 Unit: mm GM6603 9 P 15.3 ± 0.20 4.90 ± 0.20 0.90 ± 0.10 0.12 3.05 3° 2.00 ± 0.10 0.42 10.66 0.24 6.096 0.75 R0.30 0.40 Inches ) mm GM6603 TO-252 PACKAGE OUTLINE DIMENSIONS 6.50 ± 0.05 5.340 ± 0.05 29° ± 0.5° REF 0.6 7° 1.0 ± 0.05 6.10 ± 0.05 7.20 ± 0.05 0.508 ± 0.0127 2.30 ± 0.05 Pad Layout 0.244 6.20 0.75 ± 0.10 0.89 ± 0.05 0.81 ± 0.038 G 7° R 0.25 ± 0.13 R0.15 max 0.070 ± 0.05 9.900 7° 0.75 ± 0.10 2.70 ± 0.10 1.525 ± 0.10 0.228 5.80 0.118 3.0 0.243 6.172 0.101 2.58 0.063 1.6 ( Inches ) mm Unit: mm 2° ORDERING NUMBER GM 6603 1.8 TB3 T Gamma Micro. Shipping T: Tube R: Tape & Reel Package TA3: TO-263-2 TB3: TO-220 TC3: TO-252 Circuit Type GM6603 Output Voltage A: Adj, 1.5: 1.5V 1.8: 1.8V, 2.5: 2.5V 2.85: 2.85V, 3.0: 3.0V 3.3: 3.3V, 5.0: 5.0V 10