PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Key Features n n n n n n n n n General Description Output Accuracy: ± 2% Low Dropout Voltage: 180mV@150mA High PSRR: 70dB@100Hz Low Noise Output Current Limiting Short Circuit Protection Thermal Shutdown Space Saving Package SOT23-6 Pb-Free Package The dual LDO PAM3102 series of positive voltage linear regulators feature high output voltage accuracy, low quiescent current and low dropout voltage, making them ideal for battery powered applications. The line transient response and load transient response are excellent. Their high PSRR make them useful in applications where AC noise on the input power supply must be suppressed. Space-saving SOT23-6 package for 2-ch LDOs is attractive for portable and handheld applications. They have both thermal shutdown and a current limit feature to prevent device failure under extreme operating conditions. They are stable with an output capacitance of 2.2 μ F or greater. Applications n n n n n n Cellular Phone Portable Electronics, PDA Wireless Devices, Wireless LAN Computer Peripherals Camera Module GPS Receiver Typical Application IN 2 1 VOUT1 VIN CE1 PAM3102 3 CE 2 C IN 2.2 μ F Block Diagram VOUT2 GND 5 6 4 OUT1 Thermal Protection Current Limit Current Limit OUT2 VIN Co 2.2 μ F Co 2.2 μ F - - V REF + + VOUT2 VOUT1 GND CE1 Bias CE2 Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 1 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Pin Configuration & Marking Information Top View 6 SOT23-6 5 4 AB: V: Y: W: ABVYW 1 Pin Number 1 2 3 4 5 6 2 Product Code of PAM3102 Voltage Code Year Week 3 Name CE1 VIN CE2 VOUT2 GND VOUT1 Function Output 1 Enable Input Output 2 Enable Output 2 Ground Output 1 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 . Storage Temperature..................-40 OC to 125 OC ESD Rating(HBM)........................................2kV O Lead Soldering Temperature ( 5sec ) ...........300 C Input Voltage...............................................6.6V Output Current..................................150/150mA Output Pin Voltage ............. GND-0.3V to V IN+0.3V Recommended Operating Conditions O Supply Input Voltage.................................... 5.5V Max. Supply Voltage (for Max. duration of 30 minutes)................................................6.4V Enable Input Voltage...............................0V to V IN O Junction Temperature..................-40 C to 125 C O O Ambient Temperature....................-40 C to 85 C Thermal Information Parameter Symbol Package Maximum Thermal Resistance (Junction to Case) θJC SOT-23-6 130 Thermal Resistance (Junction to Ambient) θJA SOT-23-6 250 Internal Power Dissipation PD SOT-23-6 400 Unit °C/W mW Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 2 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Electrical Characteristic V CE1=V CE2=V IN=V O+1V, T A=25 OC, C IN =2.2 μ F, C O =2.2 μ F, unless otherwise noted. PARAMETER SYMBOL Input Voltage V IN Output Voltage Accuracy Vo Dropout Voltage Vdrop Test Conditions Io=1mA MIN TYP MAX UNITS Note 1 5.5 V -2.0 2.0 % Vo=1.8V, Io=150mA 950 mV Vo=2.5V, Io=150mA 350 mV Vo=2.8V, Io=150mA 180 mV Output Current IO 150 Note 2 Current Limit ILIM Vo≥1.2V 200 Quiescent Current IQ Io=0mA 175 250 μA Ground Pin Current Ignd Io=1mA to 150mA 200 250 μA 1 μA Shutdown Current ISD VCE1=V CE2=0V 0.1 Short Circuit Current Isc Vo=0V 150 Io=50mA VIN=3.0V to 4.0V Line Regulation LNR Io=50mA, VIN=3.5V to 4.5V Io=50mA, VIN=3.8V to 4.8V Load Regulation Power Supply Ripple Rejection LDR PSRR Output Noise Vn CE Input High Threshold VTH CE Input Low Threshold VTL CE Pull-Up Resistance RCE Temperature Coefficient Tc Over Temperature Shutdown Over Temperature Hysteresis OTS OTH mA mA Vo=1.8V Vo=2.5V -0.15 0.1 0.15 %/V -2 1.0 2 % Vo=2.8V VIN=3.3V Io=1mA to 150mA Io=50mA,Vo=1.8V f=100Hz 70 dB f=1kHz 63 dB f=10kHz 45 dB 35 μVrms f=10Hz to 100kHz 1.5 1.7 V 5 40 Io=1mA Io=1mA mA 0.3 V 15 MΩ O ppm/ C 155 O 40 O C C Note1: The minimum input voltage ( V IN(MIN)) of the PAM3102 is determined by output voltage and dropout voltage. The minimum input voltage is defined as : V IN(MIN)=V O+V drop Note 2: Output current is limited by P D, maximum I O=P D/( V IN(MAX)-V O). Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 3 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Typical Performance Characteristics 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 1. Output Voltage vs Input Voltage Vo=1.8V Io=1mA Io=50mA Io=150mA 2 3 4 Input Voltage(V) 5 Io=50mA,TA=25℃ 3 3.5 4.5 5 5.5 6 5 5.5 6 Vo=2.5V 2.55 Output Voltage(V) 2.5 Io=1mA 2 Io=50mA 1.5 1 0.5 Io=150mA 2.45 2.4 2.35 Io=50mA,TA=85℃ 2.3 0 Io=50mA,TA=25℃ 2.25 2 3 4 5 6 2.5 3 3.5 Input Voltage(V) 2.5 Output Voltage(V) Io=1mA 2 Io=50mA 1.5 1 0.5 Io=150mA 0 2 3 4 4 4.5 Input Voltage(V) Vo=2.8V 3 Output Voltage(V) 4 Input Voltage(V) 2.5 Output Voltage (V) Io=50mA,TA=85℃ 2.5 6 Vo=2.5V 3 Vo=1.8V 1.804 1.803 1.802 1.801 1.8 1.799 1.798 1.797 1.796 1.795 1.794 Output Voltage(V) Output Voltage(V) T A=25 OC, C IN =2.2 μ F, C O =2.2 μ F, unless otherwise noted. 5 Vo=2.8V 2.85 2.8 2.75 2.7 2.65 2.6 2.55 2.5 2.45 2.4 2.35 Io=50mA,TA=25℃ Io=50mA,TA=85℃ 2.5 6 Input Voltage(V) 3 3.5 4 4.5 5 5.5 6 Input Voltage(V) Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 4 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Typical Performance Characteristics (continued) 1.81 2. Output Voltage vs Output Current Vo=1.8V 1.81 3. Output Voltage vs Temperature Vo=1.8V 1.808 1.806 V IN=3.3V Output Voltage(V) Output Voltage(V) 1.805 V IN==5.0V 1.8 1.795 1.79 V IN=2.8V 1.804 1.802 1.8 V IN=3.3V,Io=30mA 1.798 1.796 V IN=3.3V,Io=150mA 1.794 1.785 1.792 1.79 1.78 0 50 100 25 150 45 Output Current(mA) 125 105 125 105 125 VIN=5.0V 2.505 Output Voltage(V) Output Voltage(V) 105 Vo=2.5V 2.51 2.5 2.49 2.48 V IN=2.8V VIN=3.3V 2.47 2.46 2.5 V IN=3.3V,Io=150mA 2.49 2.485 2.44 2.48 50 100 V IN=3.3V,Io=30mA 2.495 2.45 0 25 150 45 Vo=2.8V 2.815 V IN=3.3V,Io=30mA 2.8 Output Voltage(V) VIN=3.3V 2.8 VIN=2.8V 2.795 2.79 2.785 VIN=5.0V 2.78 85 Vo=2.8V 2.81 2.81 2.805 65 Temperature（℃） Output Current(mA) Output Voltage(V) 85 Temperature（℃） Vo=2.5V 2.51 65 2.79 2.78 2.77 V IN=3.3V,Io=150mA 2.76 2.75 2.775 2.74 0 50 100 25 150 45 65 85 Temperature（℃） Output Current(mA) Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 5 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Typical Performance Characteristics (continued) 4. Ground Current vs Input Voltage 300 300 5. Ground Current vs Output Current V IN=5V Io=300mA（note 1） 250 Ground Current(uA) Ground Current(uA) 250 200 150 Io=2mA Io=100mA 100 200 V IN=4V 150 V IN=3.3V 100 50 50 0 0 2 3 4 5 0 6 50 150 200 250 300 Output Current(mA) Input Voltage(V) 250 100 6. Quiescent Current vs Input Voltage 260 7. Quiescent Current vs Temperature Quiescent Current(uA) Quiescent Current(uA) 240 200 TA=25℃,Io=0mA 150 TA=85℃,Io=0mA 100 50 220 200 V IN=5V 180 V IN=3.3V 160 140 120 100 0 2 3 4 5 25 6 45 8. Dropout Voltage vs Output Current 1000 105 125 9. Dropout Voltage vs Temperature 900 Dropout Voltage(mV) Dropout Voltage(mV) 85 Temperature（℃） Input Voltage(V) 1000 900 800 700 600 65 Vo=1.8V 500 400 300 200 100 0 Vo=2.5V Vo=2.8V 800 700 Vo=1.8V 600 500 Vo=2.5V 400 300 200 100 Vo=2.8V 0 0 30 60 90 120 25 150 45 65 85 105 125 Temperature（℃） Output Current (mA) Io=150mA note 1: 2 channels total output current Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 6 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Typical Performance Characteristics (continued) 11. Load Transient Response 10. Power Supply Ripple Rejection +0 -10 Vo AC Coupling -20 -30 -40 d B -50 Io=1mA Io=150mA -60 Io DC Coupling -70 -80 Io=50mA -90 -100 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k Hz V O=1.8V, V IN=3.3V , Vpp=1V V IN=4.0V, V O=2.8V, I O=1mA to 150mA +0 -10 -20 Vo AC Coupling -30 Io=1mA -40 d B -50 Io=150mA -60 Io DC Coupling -70 -80 Io=50mA -90 -100 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k Hz V IN=4.0V, V O=2.8V, I O=1mA to 50mA V O=2.5V, V IN=3.3V , Vpp=1V +0 T -10 -20 Vo AC Coupling -30 -40 d B Io=1mA -50 -60 Io DC Coupling Io=150mA -70 -80 Io=50mA -90 -100 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k Hz V O=2.8V, V IN=3.3V , Vpp=1V V IN=4.0V, V O=2.8V, I O=50mA to 150mA Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 7 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Typical Performance Characteristics (continued) 13. Turn-on Response 12. Line Transient Response V IN DC Coupling V IN DC Coupling VO AC Coupling VO DC Coupling V IN=0 to 5V Vo=2.5V, V IN=3V to 5V, Io=1mA Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 8 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Application Information Capacitor Selection and Regulator Stability resumes operation after the junction temperature drops below 120°C. Similar to any low dropout regulator, the external capacitors used with the PAM3102 must be carefully selected for regulator stability and performance. For continuous operation, the junction temperature should be maintained below 125°C. The power dissipation is defined as: A capacitor C IN of more than 1μF can be employed in the input pin, while there is no upper limit for the capacitance of C IN. Please note that the distance between C IN and the input pin of the PAM3102 should not exceed 0.5 inch. Ceramic capacitors are suitable for the PAM3102. Capacitors with larger values and lower ESR (equivalent series resistance) provide better PSRR and line-transient response. P D= (V IN-V O)*I O+Vin*Ignd The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surrounding airflow and temperature difference between junction and ambient. The maximum power dissipation can be calculated by the following formula: P D(MAX) = (T J(MAX)-T A)/θ JA The PAM3102 is designed specifically to work with low ESR ceramic output capacitors in order to save space and improve performance. Using an output ceramic capacitor whose value is > 2.2μF with ESR>5mΩ ensures stability. Where T J(MAX) is the maximum allowable junction temperature 125°C,TA is the ambient temperature and θ JA is the thermal resistance from the junction to the ambient. Shutdown Input Operation For example, as θ JA is 250°C/W for the SOT-23 package based on the standard JEDEC 51-3 for a single-layer thermal test board, the maximum power dissipation at TA =25°C can be calculated by following formula: The PAM3102 is shutdown by pulling the CE input low, and turned on by tying the CE input to VIN or leaving the CE input floating. Input-Output ( Dropout ) Voltage P D(MAX)=(125°C-25°C)/250=0.4W SOT-23 A regulator's minimum input-output voltage differential (or dropout voltage) determines the lowest usable supply voltage. The PAM3102 has a typical 180mV dropout voltage. In batterypowered systems, this will determine the useful end-of-life battery voltage. It is also useful to calculate the junction temperature of the PAM3102 under a set of specific conditions. Suppose the input voltage V IN=3.3V, the output current I O=300mA and the case temperature T A =40°C measured by a thermalcouple during operation, the our power dissipation is defined as: Current Limit and Short Circuit Protection P D=(3.3V-2.8V)*150mA+(3.3V-1.8V) *150mA+3.3V*200 μ A≌300mW The PAM3102 features a current limit, which monitors and controls the gate voltage of the pass transistor. The output current can be limited to 300mA by regulating the gate voltage. The PAM3102 also has a built-in short circuit current limit. And the junction temperature TJ can be calculated as follows: T J = T A+P D*θ JA T J = 40°C+0.3W*250°C/W =40°C+75°C =115°C<T J(MAX) = 125°C For this application, T J is lower than the absolute maximum operating junction temperature,125°C, so it is safe to use the PAM3102 in this configuration. Thermal considerations Thermal protection limits power dissipation in the PAM3102. When the junction temperature exceeds 150°C, the OTP (Over Temperature Protection) starts the thermal shutdown and turns the pass transistor off. The pass transistor Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 9 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Ordering Information PAM3102-X XXXX XX Standard Package Package Type Voltage Version Part Number PAM3102-AST26R1 PAM3102-BST26R1 Output Voltage VOUT1 1.8V VOUT2 2.8V VOUT1 1.8V VOUT2 2.5V Marking Package Type Standard Package ABAYW SOT-23-6 3,000Units/Tape&Reel ABBYW SOT-23-6 3,000Units/Tape&Reel Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 10 PAM3102 Dual 150mA High PSRR Low-Dropout CMOS Regulator Outline Dimension SOT23-6 A A E E1 D e e1 SEE VIEWS c WITH PLANTING A A2 b SECTION A-A 0.25 A1 BASE METAL GAUGE PLANE SEATING PLANE θ L L1 VIEW B Symbol Spec A A1 1.20±0.25 0.10±0.05 A2 b c D E 1.10±0.2 0.40±0.1 0.15±0.07 2.90±0.1 2.80±0.2 Symbol E1 e e1 L L1 θ Spec 1.60±0.1 0.95BSC 1.90BSC 0.55±0.25 0.60REF 4°±4° Unit: Millimeter Power Analog Microelectronics , Inc www.poweranalog.com 09/2008 Rev 1.1 11