AMS116L-X

Advanced Monolithic Systems FEATURES • 5V Version Available* • Output Current of 100mA • Very Low Quiescent Current • Reverse Battery Protection • Input-output Differential less than 0.6V • Short Circuit protection • Internal Thermal Overload Protection AMS116 100mA LOW DROPOUT VOLTAGE REGULATOR RoHS compliant APPLICATIONS • Battery Powered Systems • Portable Consumer Equipment • Cordless Telephones • Portable (Notebook) Computers • Portable Instrumentation • Radio Control Systems • Personal Communication Equipment • Toys • Low Voltage Systems GENERAL DESCRIPTION The AMS116 series consists of positive fixed voltage regulators ideally suited for use in battery-powered systems. These devices feature very low quiescent current of 1mA or less when supplying 10mA loads. This unique characteristic and the extremely low input -output differential required for proper regulation (0.2V for output currents of 10mA) make the AMS116 ideal to use for standby power systems. Like other regulators the AMS116 series also includes internal current limiting, thermal shutdown, and is able to withstand temporary power-up with mirror-image insertion. The AMS116 is offered in the 3-pin TO-92 package and SOT-89 package. ORDERING INFORMATION PACKAGE TYPE OPER. TEMP PIN CONNECTIONS TO-92 SOT-89 RANGE AMS116N-X AMS116L-X IND X =5V *For additional available fixed voltages contact factory TO-92 Plastic Package (N) OUTPUT INPUT SOT-89 Package (L) GND 1 INPUT 2 GND 3 OUTPUT Bottom View Top View Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS116 ABSOLUTE MAXIMUM RATINGS (Note 1) Input Voltage Operating Voltage Range Load Current Internal Power Dissipation 18V 2.5V to 16V 150mA Internally Limited Maximum Junction Temperature +125°C Storage Temperature -65°C to +150°C Lead Temperature (Soldering 25 sec) 265°C ESD 2000V ELECTRICAL CHARACTERISTICS Electrical Characteristics at TJ=25°C, C2 = 100µF unless otherwise specified. PARAMETER Output Voltage Line Regulation Load Regulation Dropout Voltage IN CONDITIONS (Note 2) V = VOUT+3V V = VOUT+3V to 14V IN Min. -3 AMS116-X Typ. 2 15 80 170 400 80 ±.35 Units Max. +3 30 60 150 330 1000 % mV mV mV mV µA dB mV/°C 5mA ≤I ≤ 100 mA O IO ≤ 30 mA IO = 100 mA IO ≤ 10 mA, V = VOUT+3V to 14V IN fO = 120Hz IO ≤ 10 mA, V = VOUT+3V to 14V IN Quiescent Current Ripple Rejection Temperature Coefficient Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. For guaranteed performance limits and associated test conditions, see the Electrical Characteristics tables. Note 2: See Circuit in Typical Applications. To ensure constant junction temperature, low duty cycle pulse testing is used. Note 3: Limits appearing in boldface type apply over the entire junction temperature range for operation. Limits appearing in normal type apply for TA = TJ = 25°C. + + VIN VOUT Figure 1. SOT-89 Board Layout Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS116 APPLICATION HINTS Package Power Dissipation The package power dissipation is the level at which the thermal sensor monitoring the junction temperature is activated. The AMS116 shuts down when the junction temperature exceeds the limit of 150°C. The junction temperature rises as the difference between the input power and output power increases. The mounting pad configuration on the PCB, the board material, as well as the ambient temperature affect the rate of temperature rise. The junction temperature will be low, even if the power dissipation is high, when the mounting of the device has good thermal conductivity. When mounted on the recommended mounting pad (figure1) the power dissipation for the SOT-89 package is 600mW. For operation above 25°C derate the power dissipation at 4.8mW/°C. To determine the power dissipation for shutdown when mounted, attach the device on the PCB and increase the input-to-output voltage until the thermal protection circuit is activated. Calculate the power dissipation of the device by subtracting the output voltage from the input voltage and multiply by the output current. The measurements should allow for the ambient temperature of the PCB. The value obtained from PD/ (150°C - TA) is the derating factor. The PCB mounting pad should provide maximum thermal conductivity in order to maintain low device temperatures. As a general rule, the lower the temperature, the better the reliability of the device. The thermal resistance when the device is mounted is equal to: TJ = θJA x PD + TA The internal limit for junction temperature is 150°C. If the ambient temperature is 25°C, then: 150°C = θJA x PD + 25°C Take a vertical line from the maximum operating temperature (75°C) to the derating curve. 6. Read the value of PD at the point where the vertical line intersects the derating curve. This is the maximum power dissipation, DPD. The maximum operating current is: IOUT = (DPD/ (VIN(MAX) - VO) External Capacitors The AMS116 series require an output capacitor for device stability. The value required depends on the application circuit and other factors. Because high frequency characteristics of electrolytic capacitors depend greatly on the type and even the manufacturer, the value of capacitance that works well with AMS116 for one brand or type may not necessary be sufficient with an electrolytic of different origin. Sometimes actual bench testing will be the only means to determine the proper capacitor type and value. To obtain stability in all general applications a high quality 100µF aluminum electrolytic or a 47µF tantalum electrolytic can be used. A critical characteristic of the electrolytic capacitors is their performance over temperature. The AMS116 is designed to operate to -40°C, but some electrolytics will freeze around -30°C therefore becoming ineffective. In such case the result is oscillation at the regulator output. For all application circuits where cold operation is necessary, the output capacitor must be rated to operate at the minimum temperature. In applications where the regulator junction temperature will never be lower than 25°C the output capacitor value can be reduced by a factor of two over the value required for the entire temperature range (47µF for a high quality aluminum or 22µF for a tantalum electrolytic capacitor). With higher output currents, the stability of AMS116 decreases. Considering the fact that in many applications the AMS116 is operated at only a few milliamps (or less) of output current, the output capacitor value can be reduced even further. For example, a circuit that is required to deliver a maximum of 10mA of output current from the regulator output will need an output capacitor of only half the value compared to the same regulator required to deliver the full output current of 100mA. As a general rule, with higher output voltages the value of the output capacitance decreases, since the internal loop gain is reduced. In order to determine the minimum value of the output capacitor, for an application circuit, the entire circuit including the capacitor should be bench tested at minimum operating temperatures and maximum operating currents. To maintain internal power dissipation and die heating to a minimum, the input voltage should be maintain at 0.6V above the output. Worst-case occurs just after input power is applied and before the die had the chance to heat up. After the minimum capacitance value has been found for the specific brand and type of electrolytic capacitor, the value should be doubled for actual use to cover for production variations both in the regulator and the capacitor. 5. θJA = 125°C/ PD A simple way to determine PD is to calculate VIN x IIN when the output is shorted. As the temperature rises, the input gradually will decrease. The PD value obtained when the thermal equilibrium is reached, is the value that should be used. The range of usable currents can be found from the graph in figure 2. (mW) PD 3 DPD 6 4 5 25 50 75 T (°C) 150 Figure 2 Procedure: 1. Find PD. 2. PD1 is calculated as PD x (0.8 - 0.9). 3. Plot PD1 against 25°C. 4. Connect PD1 to the point corresponding to the 150°C. Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS116 TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage INPUT OUTPUT DIFFERENTIAL (V) INPUT OUTPUT DIFFERENTIAL (V) 0.6 0.5 0.4 0.3 0.2 0.1 0 0 80 40 120 JUNCTION TEMPERATURE (° C) IO = 50mA IO = 10mA IO = 100mA Dropout Voltage 1.2 1.0 0.8 0.6 0.4 0.2 0 0 50 OUTPUT CURRENT (mA) 100 INPUT VOLTAGE OUTPUT VOLTAGE CHANGE (V) DEVIATION (mV) 3 2 1 0 -1 -2 ~ -3 ~ Line Transient Response VIN = VOUT = 9V C2= 100 µF ~ ~ 3 0 0 15 30 TIME ( µ s) 45 OUTPUT VOLTAGE DEVIATION (mV) Load Transient Response 300 40 0 -40 C2= 100µF Peak Output Current 30 QUIESCENT CURRENT (mA) 25 20 15 10 5 0 0 20 10 INPUT VOLTAGE (V) 30 0 Quiescent Current VIN = 14V OUTPUT CURRENT ( mA) 250 TJ= 25°C 200 150 100 50 0 TJ = 85°C LOAD CURRENT(mA) TJ = -40°C ~ ~ 150 ~ ~ 0 0 15 30 TIME ( µ s) 45 60 30 90 OUTPUT CURRENT (mA) Quiescent Current 25 20 15 10 3 2 1 0 -40 IO = 0mA Quiescent Current 35 QUIESCENT CURRENT ( mA) 30 25 20 15 10 5 0 IO= 10mA IO= 50mA IO= 100mA Ripple Rejection 85 80 RIPPLE REJECTION (dB) 75 70 65 60 55 50 45 1 IO= 10mA C2 = 100µF ALUM C2 = 100µF TANTALUM QUIESCENT CURRENT (mA) ~ ~ IO = 50mA ~ ~ 0 40 80 120 TEMPERATURE (° C) -5 -20 -10 0 10 20 30 40 50 60 INPUT VOLTAGE (V) 10 100 1k 10k 100k FREQUENCY (Hz) 1M Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS116 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Ripple Rejection 85 80 RIPPLE REJECTION (dB) RIPPLE REJECTION (dB) 75 70 65 60 55 50 45 0 FQ= 120Hz Ripple Rejection 85 80 75 70 65 60 55 50 45 0 FQ= 120Hz Output Capacitor ESR EQUIVALENT SERIES RESISTANCE ( Ω ) 100 COUT= 100µF VO = 5V 10 1 STABLE REGION 0.1 25 50 75 OUTPUT CURRENT (mA) 100 25 50 75 OUTPUT CURRENT (mA) 100 0.01 0 80 20 40 60 OUTPUT CURRENT (mA) 100 Maximum Power Dissipation (TO-92) 1.0 0.9 POWER DISSIPATION (W) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 10 20 30 40 50 60 70 80 AMBIENT TEMPERATURE (° C) 0.4" Lead Lenght from PC Board 0.125" Lead Lenght from PC Board Maximum Power Dissipation (SOT-89) 1.0 0.9 POWER DISSIPATION (W) 0.8 0.7 0.6 0.5 0.4 0.3 UNMOUNTED MOUNTED ON PCB 0.2 0.1 0 0 10 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE (° C) Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS116 TYPICAL APPLICATIONS Voltage Regulator Circuit Voltage Boost Circuit VIN UNREGULATED INPUT C1* 0.1µF AMS116 VOUT REGULATED OUTPUT C2** 100µF AMS116 + 1µF + VO 47µF VOUT GND IQ IQ R *Required if regulator is located far from power supply filter. **C2 must be at least 100µF to maintain stability; it can be increased without bound to maintain regulation during transients and it should be located as close as possible to the regulator. This capacitor must be rated over the same operating temperature range like the regulator. The ESR of this capacitor is critical (see curve). VOUT = VO+IQR Current Boost Circuit Current Regulator Circuit 100 IO AMS116 R AMS116 + 10µF + + VO 47µF IQ GND + VIN 47µF 1µF IO = (VO/R )+ IQ Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS116 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. 3 LEAD TO-92 PLASTIC PACKAGE (N) 0.060±0.005 (1.524±0.127) DIA 0.180±0.005 (4.572±0.127) 0.060±0.010 (1.524±0.254) 0.140±0.010 (3.556±0.127) 0.180±0.005 (4.572±0.127) 0.90 (2.286) NOM 5° NOM 0.500 (12.70) MIN 10° NOM 0.050 (1.270) MAX UNCONTROLLED LEAD DIMENSIONS 0.050±0.005 (1.270±0.127) 0.016±0.003 (0.406±0.076) 0.015±0.002 (0.381±0.051) N (TO-92 ) AMS DRW# 042391 SOT-89 PLASTIC PACKAGE (L) 0.173-0.181 (4.40-4.60) 0.064-0.072 (1.62-1.83) 0.055-0.063 (1.40-1.60) 0.014-0.017 (0.35-0.44) 0.155-0.167 (3.94-4.25) 0.090-0.102 (2.29-2.60) 0.084-0.090 (2.13-2.29) 0.035-0.047 (0.89-1.20) 0.059 (1.50) BSC 0.118 (3.00) BSC 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56) L (SOT-89 ) AMS DRW# 042392 Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723