PAM3116 1.5A Low Dropout Voltage CMOS Regulator Features n n n n n n n n n n General Description The PAM3116 is a 1.5A CMOS LDO regulator that features a low quiescent current and low dropout voltages, as well as over temperature shutdown. The PAM3116 is stable with a ceramic output capacitor of 4.7 μF or higher. High Output Current Up to 1.5A Output Voltage Available in ADJ(0.8V) Stable with a Ceramic Output Capacitor Dropout Voltage:[email protected],Vo=3.3V Low Quiescent Current Over Temperature Shutdown Short Circuit Protection Low Temperature Coefficient Standard SOP-8 Packages Pb-Free Package This family of regulators can provide either a stand-alone power supply solution or act as a post regulator for switch mode power supplies. They are particularly suitable for applications requiring low input and output voltages. Applications n n n n PAM3116 is available in SOP-8 package. LCD TV/Monitors Set-top Box IPhone Charger Communication Devices Typical Application Circuit VIN VIN EN C IN 4.7 μF VOUT VOUT PAM3116 GND R1 CO 4.7 μF ADJ R2 VOUT=0.8x(1+R1/R2) Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 1 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Block Diagram VOUT VIN OverCurrent Shutdown OUTPUT SENSE Thermal Shutdown EN AMP R1 Reference ADJ R2 GND Pin Configuration & Marking Information Top View SOP-8 NC 1 8 NC VIN 2 7 VOUT EN 3 6 ADJ GND 4 5 NC V: Voltage Code X : Internal Code Y: Year W : Week Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 2 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Absolute Maximum Ratings These are stress ratings only and functional operation is not implied . Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground. Input Voltage...............................................6.5V Output Pin Voltage .................... -0.3V to VIN +0.3V EN, ADJ, OUTPUT SENSE Pin Voltage................ .................................................-0.3V to VIN +0.3V Maximum Output Current......................P D /(V IN -V O ) Storage Temperature ....................- 65°C to 150°C Maximum Junction Temperature.................. 150 °C Lead Soldering Temperature (5sec)........... 300 °C Recommended Operating Conditions Maximum Supply Voltage..............................6V Junction Temperature Range........-40 °C to 125 °C Ambient Temperature Range...........-40 °C to 85°C Thermal Information Param eter Thermal Res istance (Junction to Case) Thermal Res istance (Junction to Ambient) Internal Power Dissipation Symbol Package Maximum Unit θJ C SOP-8 11 °C/W θJ A SOP-8 90 °C/W PD SOP-8 1100 mW Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 3 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Electrical Characteristic V IN =V O +1V, T A =25°C, C IN =4.7 μF, C O =4.7 μF, unless otherwise noted. PARAMETER SYMBOL Test Conditions MIN TYP MAX UNITS Input Voltage VIN 2.5 6.0 V Output Voltage Range VO 0.8 5 V ADJ Reference Voltage V REF IO=1mA 0.788 0.812 V Output Voltage Accuracy VO IO=1mA -1.5 1.5 % Output Current IO Vo>0.8V 1500 Output Current Limit ILI M Vo>0.8V 1500 Short Circuit Current IS C Vo=0V Dropout Voltage Quiescent Current V drop IO =1.5A IQ IO=0mA IO=1mA, V IN =V O+1 to VO +2 Load Regulation LDR IO=1mA to 1500mA Shutdown Over Temperature Hysteresis Power Supply Ripple Rejection 2500 mA 700 mA 1700 Vo≥2.5V LNR Over Temperature mA 0.8V≤Vo<2.5V Line Regulation Temperature Coeffic ient 0.8 400 90 150 µA 0.4 %/V 1 % -0.4 -1 Tc mV 300 0.2 O 40 ppm/ C OTS IO=1mA 150 O C OTH IO=1mA 40 O C f=100Hz 70 dB f=1kHz 65 dB f=10kHz 50 dB 50 µVrms PSRR Io=100mA, Vo=1.2V Output Noise Vn f =10Hz to 100kHz, IO= 10mA EN Input High Thres hold V EH V IN =2.5V to 5V EN Input Low Threshold VE L V IN =2.5V to 5V 0.3 V EN Input High Bias Current IEH V EN= 5V, V IN=5V 0.5 µA EN Input Low Bias Current IEL V EN= 0V, V IN=5V 0.5 µA Shutdown Current IS D V EN= 0V 1 µA 1.5 V Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 4 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Typical Performance Characteristics TA =25°C,CIN =2.2 μF,Co=4.7 μF,unless otherwise noted. 1. Output Voltage vs Output Current 2. Output Voltage vs Output Current Vout=1.2V Vout=1.8V 1.22 1. 82 1. 215 1. 81 1.21 1. 8 1. 205 1. 2 1. 79 1. 195 1. 78 Vin=2.5V 1.19 Vin=3.6V Vin=3.6V 1. 185 1. 77 Vin=4.2V Vin=5V Vin=5V 1.18 1. 76 0 500 1000 1500 0 500 Out put Current (mA) 1000 1500 O utput Current(mA ) 3. Output Voltage vs Output Current 4. Output Voltage vs Output Current Vout=3.3V Vout=5V 3.302 5 . 11 5 .1 3.297 5 . 09 3.292 5 . 08 5 . 07 3.287 5 . 06 3.282 5 . 05 Vin=3.6V 3.277 5 . 04 Vin=4.2V V in = 5 .5 V 5 . 03 Vin=5V V in = 6 V 5 . 02 3.272 0 500 1000 0 1500 500 10 0 0 1 50 0 Ou tp u t C u rre n t(mA ) Output Current(mA) 6. Dropout Voltage vs Output Current 5. Quiescent Current vs Input Voltage 108 1 4 00 107 1 2 00 V o=1.2V V o=1.8V V o=3.3V 106 1 0 00 V o=5V 105 8 00 104 6 00 103 4 00 102 101 2 00 100 0 2.5 3.5 4.5 5.5 0 Input Voltage(V) 0 .5 1 1 .5 O ut pu t Curre nt (A) Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 5 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Typical Performance Characteristics T A=25°C,C IN=4.7 μF,Co=4.7 μF,unless otherwise noted. 7. Line Transient 8. Line Transient VIN DC Coupling V IN DC Coupling Vo AC Coupling Vo AC Coupling Vo=1.8V, V IN =3V to 5V, Io=100mA Vo=1.2V, V IN=3V to 5V, Io=100mA 9. Line Transient 10. Line Transient V IN DC Coupling VIN DC Coupling Vo AC Coupling Vo AC Coupling Vo=3.3V, V IN =4V to 5V, Io=100mA Vo=5V, V IN=5.5V to 6V, Io=100mA 12. Load Transient 11. Load Transient Io DC Coupling Io DC Coupling Vo AC Coupling Vo AC Coupling Vo=1.8V, V IN=3.6V, Io=0A to1.5A Vo=1.2V, V IN=3V, Io=0A to1.5A Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 6 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Typical Performance Characteristics T A=25°C,C IN=4.7 μF,Co=4.7 μF,unless otherwise noted. 13. Load Transient 14. Load Transient Io DC Coupling Io DC Coupling Vo AC Coupling Vo AC Coupling Vo=3.3V, V IN=5V, Io=0A to1.5A Vo=5V, V IN=5.5V, Io=0A to1.5A 15. PSRR +0 16. PSRR +0 T T TT T T -10 -10 -20 -20 -30 -30 -40 -40 d B d B -50 Io=100mA Io=100mA -50 -60 -60 -70 -70 -80 -80 Io=10mA -90 -100 10 20 50 Io=10mA -90 100 200 500 1k 2k 5k 10k 20k -100 10 50k 100k 20 50 100 200 500 Hz 20k 50k 100k 18. PSRR TT -10 -10 -20 -20 -30 -30 Io=100mA -40 d B Io=100mA -50 -50 -60 -60 -70 -70 Io=10mA -80 -80 Io=10mA -90 -90 -100 10 10k +0 -40 d B 5k Vo=1.8V, VIN =3V,Vpp=200mV 17. PSRR TTT TT 2k Hz Vo=1.2V, V IN=3V,Vpp=200mV +0 1k 20 50 100 200 500 1k 2k 5k 10k 20k -100 10 50k 100k 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k Hz Hz Vo=5V, V IN=5.5V,Vpp=200mV Vo=3.3V, V IN=4V,Vpp=200mV Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 7 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Application Information The PAM3116 family of low-dropout (LDO) regulators have several features that allow them to apply to a wide range of applications. The family operates with very low input voltage and low dropout voltage (typically 300mV at full load), making it an efficient stand-alone power supply or post regulator for battery or switch mode power supplies. The 1.5A output current make the PAM3116 family suitable for powering many microprocessors and FPGA supplies. The PAM3116 family also has low output noise (typically 50µVRMS with 4.7µF output capacitor), making it ideal for use in telecom equipment. Thermal Information The amount of heat that an LDO linear regulator generates is: P D =(V IN -V O )I O . All integrated circuits have a maximum allowable junction temperature (T J max) above which normal operation is not assured. A system designer must design the operating environment so that the operating junction temperature (T J) does not exceed the maximum junction temperature (TJ max). The two main environmental variables that a designer can use to improve thermal performance are air flow and external heatsinks. The purpose of this information is to aid the designer in determining the proper operating environment for a linear regulator that is operating at a specific power level. In ge ne r al , t he m a x im um ex p ec t ed po we r (P D (max)) consumed by a linear regulator is computed as: External Capacitor Requirements A 4.7µF or larger ceramic input bypass capacitor, connected between V IN and GND and located close to the PAM3116, is required for stability. A 4.7 μF minimum value capacitor from V O to GND is also required. To improve transient response, noise rejection, and ripple rejection, an additional 1 0 µF o r l a r g e r , l o w E S R c a p a c i t o r i s recommended at the output. A higher-value, low ESR output capacitor may be necessary if large, fast-rise-time load transients are anticipated and the device is located several inches from the power source, especially if the minimum input voltage of 2.5 V is used. P DMAX= (VI (avg)-VO (avg))×IO (avg)+V I (avg)×I (Q ) Where: l V I (avg) is the average input voltage. l V O(avg) is the average output voltage. l I O(avg) is the average output current. l I (Q) is the quiescent current. Regulator Protection The PAM3116 features internal current limiting, thermal protection and short circuit protection. During normal operation, the PAM3116 limits output current to about 2.5A. When current limiting engages, the output voltage scales back linearly until the over current condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. If the temperature of the device exceeds 150°C, thermal-protection circuitry will shut down. Once the device has cooled down to approximately 40°C below the high temp trip point, regulator operation resumes. The short circuit current of the PAM3116 is about 0.7A when its output pin is shorted to ground. For most LDO regulators, the quiescent current is insignificant compared to the average output current; therefore, the term V I(avg) xI (Q) can be neglected. The operating junction temperature is computed by adding the ambient temperature (T A) and the increase in temperature due to the regulator' s power dissipation. The temperature rise is computed by multiplying the maximum expected power dissipation by the sum of the thermal resistances between the junction and the case (Rθ JC), the case to heatsink (R θCS), and the heatsink to ambient (Rθ SA). Thermal resistances are measures of how effectively an object dissipates heat. Typically, the larger the device, the more surface area available for power dissipation so that the object’s thermal resistance will be lower. Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 8 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Application Information Setting the Output Voltage The internal reference is 0.8V (Typical). The output voltage is calculated as below: R1 0.8 VO=0.5×1+ R2 The output voltage is given by Table 1. Table 1: Resistor selection for output voltage setting Vo R1 R2 1.2V 56k 110k 1.5V 130k 150k 1.8V 150k 120k 2.5V 215k 100k 3.3V 374k 120k 5V 620k 120k Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 9 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Ordering Information PAM3116X X X xxx X Shipping Package Output Voltage Number of Pins Package Type Pin Configuration Pin Configuration B Type: Package Type Number of Pins L: SOP-8 B: 8 Output Voltage ADJ: Adjustable(0.8V-5.0V) 1. NC 2. VIN 3. EN 4. GND 5. NC 6. ADJ 7. VOUT 8. NC Part Number Output Voltage Marking PAM3116BLBADJR Adjus table P3116 XXXYW Package T ype MOQ & Shipping Pckage SOP-8 2,500 Units/Tapes&Reel Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 10 PAM3116 1.5A Low Dropout Voltage CMOS Regulator Outline Dimensions SOP-8 REF DIMENSIONS Millimeters B G Min Max A 5.80 6.20 B 4.80 5.00 C 3.80 4.00 D 0º 8º E 0.40 0.90 F 0.19 0.25 M 0.10 0.25 H 0.35 0.49 L 1.35 1.75 J 0.375 REF K 45º G 1.27 TYP J K D H E Power Analog Microelectronics, Inc www.poweranalog.com 10/2011 Rev1.0 11