GM11175.0TC3R

MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS Description GM1117 of positive adjustable and fixed regulators is designed to provide 1.0A output with low dropout voltage performance. On-chip trimming adjusts the reference voltage to 1%. For usage on working in post regulators or microprocessor power supplies, low voltage operation and fast transient response are required. Pin-to-pin compatible with the LT1086 family of regulators, GM1117 is available in surface-mount SOT-223 and TO252 packages. Features Adjustable or Fixed Output Output Current of 1.0A Dropout Voltage (Typical) 1.15V @ 1.0A Line Regulation 0.2% max. Load Regulation 0.4% max. Fast Transient Response Current Limit Protection Thermal Shutdown Protection Application High Efficiency Linear Regulators Post Regulators for Switching Supplies Microprocessor Supply Hard Drive Controllers Battery Chargers Adjustable Power Supply TYPICAL APPLICATION CIRCUITS (Adjustable Version) (Fixed Version) VIN> 4.75V GM1117-Adj 3 VIN ADJ VOUT 2 R1 133W 1.0% R2 232W 1.0% VOUT= 3.45V VIN> 4.75V 3 VIN GM1117-3.3 VOUT 2 GND VOUT= 3.3V + 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 GM1117 V0.1 1 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS MARKING INFORMATION & PIN CONFIGURATIONS (Top View) TO-252 (DPAK) TO-220 TO-263-2 (D PAK) 2 SOT-223 GM1117 VVAYWW GM1117 VVAYWW GM1117 VVAYWW GM1117 VVAYWW VOUT ADJ/ GND* VIN VIN VOUT ADJ/ GND* V V/VVV A Y WW = Output Voltage (50 = 5.0V, 285= 2.85V ,A =Adj ) = Assembly Location = Year = Weekly VIN VOUT ADJ/ GND* VIN VOUT ADJ/GND* On fixed versions Pin 1 = GND, on adjustable versions Pin 1 = ADJ Tab = VOUT ORDERING INFORMATION Ordering Number GM1117-AST3T GM1117-AST3R GM1117-ATC3T GM1117-ATC3R GM1117-ATB3T GM1117-ATA3T GM1117-ATA3R GM1117-1.5ST3T GM1117-1.5ST3R GM1117-1.5TC3T GM1117-1.5TC3R GM1117-1.5TB3T GM1117-1.5TA3T GM1117-1.5TA3R GM1117-1.8ST3T GM1117-1.8ST3R GM1117-1.8TC3T Output Voltage Adj Adj Adj Adj Adj Adj Adj 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.8 1.8 1.8 1.8 1.8 1.8 1.8 Package SOT-223 SOT-223 T O-252 T O-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 Shipping 80 Units / Tube 2,500 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 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 80 Units / Tube 2,500 Units / Tape & Reel 50 Units / Tube 50 Units / Tube 800 Units / Tape & Reel GM1117 GM1117-1.8TC3R GM1117-1.8TB3T GM1117-1.8TA3T GM1117-1.8TA3R * For detail Ordering Number identification, please see last page. 2 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS ORDERING INFORMATION (Continued) Ordering Number GM1117-2.5ST3T GM1117- 2.5 ST3R GM1117-2.5TC3T GM1117-2.5TC3R GM1117-2.5TB3T GM1117-2.5TA3T GM1117-2.5TA3R GM1117-2.85ST3T GM1117- 2.85 ST3R GM1117-2.85TC3T GM1117-2.85TC3R GM1117-2.85TB3T GM1117-2.85TA3T GM1117-2.85TA3R GM1117-3.0ST3T GM1117- 3.0 ST3R GM1117-3.0TC3T GM1117-3.0TC3R GM1117-3.0TB3T GM1117-3.0TA3T GM1117-3.0TA3R GM1117- 3.3 ST3T GM1117- 3.3 ST3R GM1117-3.3TC3T GM1117-3.3TC3R GM1117-3.3TB3T GM1117-3.3TA3T GM1117-3.3TA3R GM1117-5.0ST3T GM1117- 5.0 ST3R GM1117-5.0TC3T GM1117-5.0TC3R GM1117-5.0TB3T GM1117-5.0TA3T GM1117-5.0TA3R Output Voltage 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.85 2.85 2.85 2.85 2.85 2.85 2.85 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 3.3 3.3 3.3 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Package SOT-223 SOT-223 T O-252 T O-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 SOT-223 SOT-223 TO-252 TO-252 TO-220 TO-263 TO-263 Shipping 80 Units / Tube 2,500 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 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 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 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 80 Units / Tube 2,500 Units / Tape & Reel 50 Units / Tube 50 Units / Tube 800 Units / Tape & Reel * For detail Ordering Number identification, please see last page. GM1117 3 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS ABSOLUTE MAXIMUM RATINGS PARAMETER Power Dissipation Input Voltage Lead Temperature(Soldering, 10sec) SYMBOL PD VIN TLEAD TJ TSTG VALUE Internally limited 7.0 300 0 to 125 0 to 150 -65 to + 150 UNIT W V °C °C °C Operating Junction Temperature Range Control Section Power Transistor Storage Temperature Range Thermal Characteristics SOT-223 Thermal Resistance, Junction-to-Case DPAK Thermal Resistance, Junction-to-Case 2 D PAK Thermal Resistance, Junction-to-Case 15 RqJC 6.0 3.0 °C/ W BLOCK DIAGRAM (Fixed Version) VOUT VIN Thermal Shutdown Bandgap Reference + Error Amplifier Output Current Limit GND (Adjustable Version) VOUT GM1117 VIN Thermal Shutdown Bandgap Reference + Error Amplifier Output Current Limit ADJ 4 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS ELECTRICAL CHARACTERISTICS (Typicals and limits appearing in normal type apply for TJ = 25°C) Parameter Reference Voltage GM1117-Adj GM1117-1.8 GM1117-2.5 Output Voltage GM1117-3.3 GM1117-5.0 GM1117-Adj GM1117-1.8 Line Regulation GM1117-2.5 GM1117-3.3 GM1117-5.0 GM1117-Adj GM1117-1.8 Load Regulation GM1117-2.5 GM1117-3.3 GM1117-5.0 Dropout Voltage Current Limit Minimum Load Current GM1117-Adj GM1117-1.8 GM1117-2.5 Quiescent Current GM1117-3.3 GM1117-5.0 Adjust Pin Current Temp. Coefficient Thermal Regulation Ripple Rejection TC RA GM1117-Adj IADJ IQ VD ICL IO MIN REGLOAD REGLINE VO Symbol VREF Condition IOUT=10mA, VIN= 5V 10mA IOUT 1.0A, 2.65V VIN 7V IOUT=10mA, VIN=3.3V 0 IOUT 1.0A, 3.3V VIN 7V IOUT=10mA, VIN=4V 0 IOUT 1.0A, 4V VIN 7V IOUT=10mA, VIN=4.8V 0 IOUT 1.0A, 4.8V VIN 7V IOUT=10mA, VIN=6.5V 0 IOUT 1.0A, 6.5V VIN 7V VIN VIN VIN VIN VIN 7V 7V 7V 7V 7V 1.0A IOUT=10mA, 2.75V IOUT=10mA, 3.3V IOUT=10mA, 4V IOUT=10mA, 4.8V IOUT=10mA, 6.5V Min 1.238 1.225 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 0.20 0.20 0.20 0.20 0.20 1.15 Max 1.262 1.275 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=3.3V, 10mA IO VIN=4.0V, 10mA IO VIN=4.8V, 10mA IO VIN=6.5V, 10mA IO 1.0A 1.0A 1.0A 1.0A % IOUT=1.0A 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 1.0A 1.0A 1.0A 1.0A V A 1.1 3.1 3 7 7 7 7 7 13 13 mA mA 13 13 90 µA %/°C %/W dB IOUT=10mA, 2.75V 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=1.0A GM1117 5 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS GM1117 VIN C1 VIN VOUT Adj VREF R1 C2 VOUT APPLICATION INFORMATION GM1117 linear regulators provide fixed and adjustable output voltages at currents up to 1.0A. These regulators are protected against overcurrent conditions and include thermal shutdown protection. The GM1117's have a composite PNP-NPN output transistor and require an output capacitor for stability. A detailed procedure for selecting this capacitor follows. IAdj CAdj R2 Figure 1. Resistor Divider Scheme Adjustable Operation The GM1117 has an output voltage range of 1.25 V to 5.5 V. An external resistor divider sets the output voltage as shown in Figure 1. The regulator maintains a fixed 1.25V (typical) reference between the output pin and the adjust pin. A resistor divider network R1 and R2 causes a fixed current to flow to ground. This current creates a voltage across R2 that adds to the 1.25 V across R1 and sets the overall output voltage. The adjust pin current (typically 50 µA) also flows through R2 and adds a small error that should be taken into account if precise adjustment of VO UT i s necessary. The output voltage is set according to the formula: R1 + R2 VOUT = VREF X ( ) + IAdj X R2 R1 The term IAdj × R2 represents the error added by the adjust pin current. R1 is chosen so that the minimum load current is at least 2.0 mA. R1 and R2 should be the same type, e.g. metal film for best tracking over temperature. While not required, a bypass capacitor from the adjust pin to ground will improve ripple rejection and transient response. A 0.1 µF tantalum capacitor is recommended for “first cut” design. Type and value may be varied to obtain optimum performance vs. price. 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 GM1117 higher capacitance values will improve the transient response and stability. Most applications for the GM1117'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: DV = DI x ESR 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 the best results. 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. GM1117 6 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS 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 2 Protection Diode Scheme for Large Output Capacitors (a),(b) Output Voltage Sensing The GM1117 are three terminal regulators. For which, 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 GM1117 should be connected are as shown in Figure 3. VIN VIN VOUT RC Conductor Parasitic Resistance RLOAD GM1117-3.3 GND (a) Fixed Version (a) Fixed Version IN4002 VIN VIN VOUT VOUT VIN C2 VIN ADJ VOUT RC R1 R2 (b) Adjustable Version (b) Adjustable Version Figure 3 (a),(b) Conductor Parasitic Resistance Effects are Minimized by this Grounding Scheme For Fixed and Adjustable Output Regulators GM1117-3.3 C1 GND Conductor Parasitic Resistance RLOAD GM1117-Adj IN4002 VIN VIN VOUT VOUT GM1117-Adj C1 ADJ R1 CADJ C2 Calculating Power Dissipation and Heat Sink Requirements R2 The GM1117 precision linear regulators include thermal shutdown and current limit circuitry to protect the deIn the GM1117 linear regulators, the discharge path is through a large junction, and protection diodes are normally not needed. However, damage can occur if the regulator is used with large output capacitance values and the input voltage is instantaneously shorted to ground. In this case, a diode connected as shown above in Figure 2. vices. However, high power regulators normally operate at high junction temperatures. 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 GM1117, and electrical isolation may be required for some applications. Thermal compound should always be used with high current regulators like the GM1117. GM1117 7 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS 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) The relationship of these four factors is expressed by equation (1): TJ = TA + PD X RQJA ........(1) 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 ........(2) 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 resistance 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+ R QSA ........(3) 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 , GM1117 8 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 GM1117 the majority of the heat is generated in the power transistor section. MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS T ypical Performance Characteristics 1.00 0.10 TCASE = 0°C Output Voltage Deviation (%) 0.08 0.06 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 0.95 TCASE = 25°C VDROPOUT 0.90 0.85 0.80 TCASE = 125°C 0.75 0 200 400 600 800 1000 -0.12 0 10 20 30 40 50 60 70 80 90 100 110 120 130 TJ (°C) IOUT(mA) Figure 3. Dropout Voltage vs. Output Current Figure 4. Reference Voltage vs. Temperature 70 65 Adjust Pin Current(µA) 60 55 50 45 40 0 10 85 IO = 10mA Ripple Rejection(dB) 75 65 55 45 35 TCASE = 25°C IOUT = 1.0A (VIN - VOUT) = 3.0V 25 VRIPPLE = 1.0VP-P Cadj =0.1µF 15 20 30 40 50 60 70 80 90 100 110 120 130 Temperature (°C) 1 01 102 103 104 105 106 Frequency(Hz) Figure 5. Adjust Pin Current vs. Temperature Figure 6. Ripple Rejection vs. Frequency 300 Load Step(mA) Voltage Deviation(mV) 3.5 3.3 3.1 200 100 0 -100 -200 1000 500 0 0 1 2 3 4 5 Time(µS) ISC (A) 2.9 2.7 2.5 2.3 2.1 1.9 1.7 6 7 8 9 10 1.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 VOUT = 3.3V COUT = CIN = 22µF Tantalum CAdj =0.1µF VIN - VOUT(V) Figure 7. Transient Response Figure 8. Short Circuit Current vs. VIN-VOUT GM1117 9 MICROELECTRONICS A A Power Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS TO-252-3 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 7° 0.070 ± 0.05 9.900 7° 0.75 ± 0.10 2.70 ± 0.10 R 0.25 ± 0.13 0.81 ± 0.038 0.101 2.58 0.228 5.80 0.243 6.172 0.244 6.20 0.118 3.0 2.30 ± 0.05 0.508 ± 0.0127 P ad Layout 0.75 ± 0.10 0.89 ± 0.05 1.525 ± 0.10 0.063 1.6 ( Inches ) mm R0.15 max 2° Unit: mm SOT- 223 PACKAGE OUTLINE DIMENSIONS 1.80max 0.3 ± 0.05 3.0 ± 0.05 1.75 ± 0.10 0.60 0.65 ± 0.10 3.5 ± 0.10 7.0 ± 0.15 0.06 ± 0.04 Pad Layout 0.15 3.8 0.079 2.0 1.75 ± 0.10 2.30TYP 0.95TYP 4.6 ± 0.1 0~0.075 0~10° 0.091 2.3 0.079 2.0 0.091 2.3 0.248 6.3 0.70 ± 0.05 GM1117 13° 0.84 1.6 ± 0.10 0.46 13° 6.50 ± 0.10 0.059 1.5 0.059 1.5 0.059 1.5 Inches mm Unit: mm 10 MICROELECTRONICS A A Power Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS 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 18.95 MAX 3° 0.9 7.0 8.70 2.80 ± 0.10 4.50 ± 0.20 8.0 1.30 -0.05 +0.1 7.0 8.40 1.46 1.00 45° 3.00 3° 3° 13.08 ± 0.20 10.08 ± 0.30 1.27 ± 0.10 3-R0.2 2.54 TYP (2.54 ± 0.20) 0.80 ± 0.10 1.52 ± 0.10 0.50 -0.05 +0.1 2.40 ± 0.20 3° 3° 2 - R 0.3 Unit: mm 10.00 ± 0.20 T O-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 Pad Layout 0.63 17.02 0.33 8.38 15.3 ± 0.20 3° 1.4 ± 0.20 4.90 ± 0.20 0.90 ± 0.10 1.27 ± 0.10 2.54 TYP (2.54 ± 0.20) 0.75 R0.30 2.00 ± 0.10 3° 0.10 ± 0.01 R0.30 2.40 ± 0.20 2.54 ± 0.10 0.50 -0.05 10.0 ± 0.20 7.0 4.0 0.40 +0.1 0.12 3.05 0.42 10.66 0.24 6.096 0.04 1.016 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 GM1117 11 Inches ) mm MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS ORDERING NUMBER GM 1117 A ST3 R Gamma Micro. Shipping R: Tape & Reel T: Tube Circuit Type 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 Package TC3: TO-252 TB3: TO-220 TA3: TO-263-2 ST3: SOT-223 GM1117 12 MICROELECTRONICS A A P ower Management GM1117 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS GM1117 13