PAM3112 300mA CMOS Linear Regulator Features General Description n n n n n n n n n n The PAM3112 regulator features low quiescent current (65 μ A Typ.) and excellent line/load regulation, making it ideal for battery powered applications. The output voltage can be 1.2V or 1.3V. Space-saving packages SOT-23, SOT-89 and SC70 are attractive for portable and handheld applications. It has both thermal shutdown and a current limit features to prevent device failure under extreme operating conditions. The device is stable with an output capacitance of 2.2 μ F or greater. Accuracy within ±2% Quiescent Current: 65 μ A Typ. Excellent Line/Load Regulation Guaranteed 300mA Output Current Fast Response Current Limiting Short Circuit Protection Low Temperature Coefficient Thermal Shutdown Space Saving Package: SOT-23, SOT-89 and SC70 n Pb-Free Package Applications n n n n n n n Cordless Phone Cellular Phone Bluetooth Earphone Digital Camera Portable Electronics WLAN M P 3 Player Typical Application Block Diagram VOUT VIN VIN VOUT PAM3112 GND C IN 1μF VIN CO 2.2 μ F VOUT OverCurrent Shutdown IN OUT VIN VOUT PAM3112 C IN 1μF EN GND EN BYP BYP C BYP 10nF CO 2.2 μ F Thermal Protection Amp GND Bandgap Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 1 PAM3112 300mA CMOS Linear Regulator Pin Configuration & Marking Information 3 5 4 P3112V XXXYW AOVYW AOVYW 2 1 1 2 Top View SC70-3L 1 3 Top View SC70-4L 3 4 AOVYW 1 Top View SOT89-3 Top View SOT23 - 5 Top View SOT23-3 1 AO: Product Code of PAM3112 X: Internal Code V: Voltage Code Y: Year W: Week 3 Top View SC70-5L 5 3 AOVYW 2 2 4 AOVYW 1 2 2 3 Pin Description Pin 1 2 3 VOUT GND VIN GND VOUT VIN VIN GND EN GND VIN VOUT VOUT GND VIN SC70-3L VIN VOUT GND SC70-4L EN GND VOUT VIN SC70-5L VIN GND EN BYP SOT23-3 SOT23-5 SOT89-3 Name Input GND Ground BYP VOUT 5 BYP VOUT VOUT Function VIN EN 4 Chip Enable(active high) Bypass Pin, need a 10nF capacitor connect to GND Output Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 2 PAM3112 300mA CMOS Linear 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 .................................................. 6V Output Current .....................................P D/(V IN-V O) Output Pin Voltage .............. GND-0.3V to V IN+0.3V Lead Soldering Temperature (5sec) ............. 300 °C Maximum Junction Temperature..................150 °C Storage Temperature ....................- 65 °C to 150 °C ESD Rating ............................................. Class B Recommended Operating Conditions Junction Temperature ..................- 40 °C to 125 °C Ambient Temperature ......................- 40°C to 85°C Thermal Information Parameter Thermal Resistance (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation Symbol θJC θJA PD Package Maximum SOT-23 130 SOT-89 45 SC70 TBD SOT-23 250 SOT-89 160 SC70 300 SOT-23 400 SOT-89 550 SC70 300 Unit °C/W °C/W mW Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 3 PAM3112 300mA CMOS Linear Regulator Electrical Characteristic T A= 25°C , V IN= 3 V , C IN= 1 μ F , C O= 2.2 μ F , unless otherwise noted. Parameter Symbol Test Conditions Input Voltage V IN Output Voltage Accuracy Vo Output Current IO Ground Current IG ND Quiescent Current IQ Line Regulation LNR Load Regulation LDR Short Circuit Current ISC Temperature Coefficient Tc Over Temperature Shutdown Over Temperature Hysteresis Power Supply Ripple Rejection OTS OTH PSRR Io=1mA MIN TYP MAX Units 2.5 5.5 V -2 2 % 300 Note 1 mA Io=1mA to 300mA 70 90 μA Io=0mA 65 90 μA 0.1 0.15 %/V Io= 1mA to 300mA 30 60 mV Vo=0V 130 mA 40 ppm/ C V IN =2.5V to 5.0V Io=10mA -0.15 Io=1mA Io=1mA 150 O 30 O Io=100mA f=100Hz 70 CB YP=10nF f=1kHz 65 f =10Hz to 100kHz, Output Noise Vn EN Input High Threshold V IH V IN =2.5V to 5V EN Input Low Threshold V IL V IN =2.5V to 5V Shutdown Current ISD V EN=0V O C C dB 50 CB YP=10nF μVrms 1.5 V 0.01 0.3 V 1 μA Note 1: Output current is limited by P D, Maximum Io=400mW/(V IN(MAX.)-Vo). Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 4 PAM3112 300mA CMOS Linear Regulator Typical Performance Characteristics T A= 25°C , C IN= 1 μ F , C O= 2.2 μ F, V O=1.2V, unless otherwise noted. 1. Output Voltage vs Input Voltage 2. Output Voltage vs Output Current 1.205 1.25 1.2 1.15 1.1 Output Voltage(V) Output Voltage(V) 1.2 IO=300mA 1.05 IO=150mA 1 0.95 0.9 1.195 1.19 V IN=4V 1.185 V IN=5V 1.18 IO=1mA 0.85 V IN=3V 1.175 0.8 2 3 4 5 0 6 50 100 Input Voltage(V) 1.195 70 1.19 60 IO=30mA 1.18 IO=300mA 1.17 40 30 20 10 1.16 0 50 100 2 150 3 Temperature(℃) 80 100 78 76 74 72 IO=150mA 0 120 150 IO=1mA 40 68 90 IO=300mA 60 20 60 6 80 70 30 4 5 Quiescent Current(uA) 6. Ground Current vs Input Voltage 120 Ground Current(uA) Ground Current(uA) 5. Ground Current vs Temperature 82 0 300 50 1.165 0 250 4. Quiescent Current vs Input Voltage 80 Input Voltage(V) Output Voltage(V) 3. Output Voltage vs Temperature 1.175 200 Output Current(mA) 1.2 1.185 150 2 3 4 5 6 Input Voltage(V) Temperature(℃) Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 5 PAM3112 300mA CMOS Linear Regulator Typical Performance Characteristics (continued) 8. Line Regulation Transient Response 7. Load Regulation Transient Response Vo AC Coupling V IN DC Coupling Io DC Coupling Vo AC Coupling Io=1mA,V IN=3V to 5V I O=1mA to 100mA 9. Power Supply Ripple Rejection +0 -10 Vo AC Coupling I O=100mA -20 -30 d B -40 -50 Io DC Coupling I O=1mA -60 -70 -80 10 20 50 100 200 500 1k 2k 5k 10k 20k 50k100k Hz V IN=3V,Vpp=1V I O=1mA to 300mA Vo AC Coupling Io DC Coupling I O=100mA to 300mA Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 6 PAM3112 300mA CMOS Linear Regulator Application Information Capacitor Selection and Regulator Stability Internal P-Channel Pass Transistor Similar to any low dropout regulator, the external capacitors used with the PAM3112 must be carefully selected for regulator stability and performance. The PAM3112 features a 0.75 Ω P-Channel MOSFET device as a pass transistor. The P-MOS pass transistor enables the PAM3112 to consume only 65 μ A of ground current during low dropout, light-load, or heavy-load operation. These features increase the battery operation life time. A capacitor C IN of more than 1 μ F can be used at the PAM3112 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 PAM3112 should not exceed 0.5 inch. Ceramic c a p a c i t o r s a r e s u i t a b l e f o r t h e PA M 3 11 2 . Capacitors with larger values and lower ESR (equivalent series resistance) provide better PSRR and line-transient response. Input-Output ( Dropout ) Voltage A regulator's minimum input-output voltage difference (or dropout voltage) determines the lowest usable supply voltage. The PAM3112 has a typical 300mV dropout voltage. In batterypowered systems, this will determine the useful end-of-life battery voltage. The PAM3112 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. Current Limit and Short Circuit Protection The PAM3112 features a current limit, which monitors and controls the gate voltage of the pass transistor. The output current can be limited to 400mA by regulating the gate voltage. The PAM3112 also has a built-in short circuit current limit. A 10nF bypass capacitor connected to BYP pin is suggested for suppressing output noise. The capacitor, in series connection with an internal 200k Ω resistor, forms a low-pass filter for noise reduction. Increasing the capacitance will slightly decrease the output noise, but increase the startup time. Thermal considerations Thermal protection limits power dissipation in the PA M 3 11 2 . W h e n t h e j u n c t i o n t e m p e r a t u r e exceeds 150°C, the OTP (Over Temperature Protection) starts the thermal shutdown and turns the pass transistor off. The pass transistor resumes operation after the junction temperature drops below 120°C. Load Transient Considerations Curve 7 of the PAM3112 load-transient response on page 6 shows two components of the output response, a DC shift from the output impedance due to the load current change and transient response. The DC shift is quite small due to excellent load regulation of the PAM3112. The transient spike, resulting from a step change in the load current from 1mA to 300mA, is 20mV. The ESR of the output capacitor is critical to the transient spike. A larger capacitance along with smaller ESR results in a is smaller spike. For continuous operation, the junction temperature should be maintained below 125°C. The power dissipation is defined as: P D= (V IN-V OUT)*I O+V IN*I GND 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: Shutdown Input Operation The PAM3112 is shut down by pulling the EN input low and turned on by tying the EN input to VIN or leaving the EN input floating. P D(MAX) = (T J(MAX)-T A)/θ JA Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 7 PAM3112 300mA CMOS Linear Regulator Where T J(MAX) is the maximum allowable junction temperature 125°C, T A is the ambient temperature and θ JA is the thermal resistance from the junction to the ambient. thermal couple during operation, the power dissipation is defined as: 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 T A=25°C can be calculated by following formula: And the junction temperature T J can b e calculated as follows: P D=(3.3V-1.2V)*150mA+3.3V*70 μ A≌315mW T J = T A+P D*θ JA T J = 40°C+0.35W*250°C/W =40°C+78.75°C =118.75°C<T J(MAX) = 125°C P D(MAX)=(125°C-25°C)/250=0.4W SOT-23 It is also useful to calculate the junction temperature of the PAM3112 under a set of specific condition. Suppose the input voltage V IN=3.3V, the output current I O=150mA and the case temperature T A =40°C measured by a For this application, T J is lower than the absolute maximum operating junction temperature 125°C, so it is safe to use the PAM3112 in this configuration. Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 8 PAM3112 300mA CMOS Linear Regulator Ordering Information PAM3112 X X X X Output Voltage Number of Pins Package Type Pin Configuration Pin Configuration Package Type Number of Pins A: SOT-23 A: 3 120：1.2V 1. VOUT C: SOT89 B: 5 130：1.3V 2. GND U: SC70 K: 4 A Type Output Voltage 3. VIN B Type 1.GND 2. VOUT 3. VIN D Type 1. VIN 2. GND 3. EN 4. BYP 5. VOUT F Type 1. EN 2. GND 3. VOUT 4. VIN G Type 1. VIN 2. VOUT 3. GND H Type 1. GND 2. VIN 3. VOUT Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 9 PAM3112 300mA CMOS Linear Regulator Ordering Information Part Number Output Voltage Marking Package Type Standard Package PAM3112AAA120 1.2V AOBYW SOT23-3 3,000 Units/Tape & Reel PAM3112BAA120 1.2V AOBYW SOT23-3 3,000 Units/Tape & Reel PAM3112DAB120 1.2V AOBYW SOT23-5 3,000 Units/Tape & Reel PAM3112ACA120 1.2V SOT89-3 1,000 Units/Tape & Reel PAM3112HCA120 1.2V SOT89-3 1,000 Units/Tape & Reel PAM3112GUA120 1.2V AOBYW SC70-3 3,000 Units/Tape & Reel PAM3112FUK120 1.2V AOBYW SC70-4 3,000 Units/Tape & Reel PAM3112DUB120 1.2V AOBYW SC70-5 3,000 Units/Tape & Reel PAM3112AAA130 1.3V AOWYW SOT23-3 3,000 Units/Tape & Reel PAM3112BAA130 1.3V AOWYW SOT23-3 3,000 Units/Tape & Reel PAM3112DAB130 1.3V AOWYW SOT23-5 3,000 Units/Tape & Reel PAM3112ACA130 1.3V SOT89-3 1,000 Units/Tape & Reel PAM3112HCA130 1.3V SOT89-3 1,000 Units/Tape & Reel PAM3112GUA130 1.3V AOWYW SC70-3 3,000 Units/Tape & Reel PAM3112FUK130 1.3V AOWYW SC70-4 3,000 Units/Tape & Reel PAM3112DUB130 1.3V AOWYW SC70-5 3,000 Units/Tape & Reel P3112B XXXYW P3112B XXXYW P3112W XXXYW P3112W XXXYW Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 10 PAM3112 300mA CMOS Linear Regulator Outline Dimension SOT23-3 D A B A1 E H Dim S e Millimeters Min. Typ. Max. A 1.00 1.15 1.30 A1 0.00 0.05 0.10 B 0.35 0.43 0.51 C 0.10 0.175 0.25 D 2.70 2.90 3.10 E 1.40 1.60 1.80 e L 1.90BSC H 2.40 L 0.37 2.70 3.00 C Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 11 PAM3112 300mA CMOS Linear Regulator Outline Dimension c (REF.) SOT23-5 0.25 D e1 θ L1 (REF.) A2 A1 A E1 E L REF. REF. A A1 A2 c D E E1 L L1 θ b e e1 Min 0 0.70 2.70 2.60 1.40 0º 0.30 Millimeter Nom 1.10MAX 0.05 1.00 0.12REF. 2.90 2.80 1.60 0.45REF. 0.60REF. 5º 0.40 0.95REF. 1.90REF. Max 0.10 1.295 3.10 3.00 1.80 10º 0.50 Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 12 PAM3112 300mA CMOS Linear Regulator Outline Dimension SOT89-3 4 . 5 0 . 05 1 . 650 REF 1 . 50 0 . 05 2 . 5 0 . 05 4 . 20 0 . 05 1 . 400 REF 6’ 1 . 00 0 . 07 1 . 50 1 . 50 3 . 00 0 . 025 0 . 46 0 . 025 0 . 38 0 . 01 6’-2X 6’-2X ( Unit : mm ) Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 13 PAM3112 300mA CMOS Linear Regulator Outline Dimension SC70-3 A1 Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 14 PAM3112 300mA CMOS Linear Regulator Outline Dimension SC70-4 Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 15 PAM3112 300mA CMOS Linear Regulator Outline Dimension SC70-5 Power Analog Microelectronics , Inc www.poweranalog.com 10/2008 Rev 1.3 16