AMS500 FEATURES APPLICATIONS • Fixed and Adjustable Versions Available • Output Current up to 500mA • Very Low Quiescent Current • Reverse Battery Protection • Input-output Differential less than 0.6V • Short Circuit Protection • Internal Thermal Overload Protection • Overvoltage Protection • ON/OFF Pin • Cellular Telephones • Portable Consumer Equipment • Portable (Notebook) Computers • Battery Powered Systems • Portable Instrumentation • Radio Control Systems • CD/DVD drives • Automotive GENERAL DESCRIPTION The AMS500 series consists of positive fixed and adjustable voltage regulators ideally suited for use in battery-powered systems. These devices feature very low quiescent current of 0.8mA or less when supplying 50mA loads. This unique characteristic and the low input-output differential required for proper regulation (0.2V for output currents of 100mA) make the AMS500 ideal to use for standby power systems. Internal circuitry of AMS500 is protected from input fault conditions caused by input voltages that exceed maximum rated input voltage. During line transients, when the input voltage to the regulator can momentarily exceed the specified maximum operating voltage, the regulator will automatically shut down to protect both internal circuits and the load. The AMS500 series also includes internal current limiting, thermal shutdown. The AMS500 is offered in 3 lead TO-92, SOT-89, SOT-223 and 5 leads SOT-23 packages. ORDERING INFORMATION OUTPUT PACKAGE TYPE 3L TO-92 SOT-89 VOLTAGE FIXED AMS500N-X AMS500L-X ADJ. X = 2.0V, 2.5V, 3.0V, 3.3V, 3.5V, 4.0V, 5.0V. SOT-23-5 AMS500M1-X AMS500M1 TEMP. SOT-223 AMS500-X (R) 1 Advanced Monolithic Systems http://www.ams-semitech.com RANGE -40ºC to +85 ºC -40ºC to +85 ºC AMS500 ABSOLUTE MAXIMUM RATINGS (Note 1) Input Voltage Operating Overvoltage Protection Internal Power Dissipation (Note 4) Maximum Junction Temperature +125°C Storage Temperature -65°C to +150°C Lead Temperature (Soldering 25 sec) 265°C ESD 2000V 25V 26V to 40V Internally Limited ELECTRICAL CHARACTERISTICS Electrical Characteristics at VIN =6.3V, IO =5mA, TJ=25°C, C2 = 22µF unless otherwise specified. PARAMETER AMS500-X CONDITIONS Min. Typ. Max. Units Fixed Output Voltage Versions Output Voltage Tolerance -4.0 % % ± 5.0 6.3V ≤VIN ≤25V, IO=100 mA Line Regulation +4.0 6V ≤VIN ≤ 15V 5 10 mV 15V ≤VIN ≤ 25V 5 30 mV 5mA ≤IO ≤ 100 mA 5 25 mV 5mA ≤10 ≤ 200 mA 5mA ≤10 ≤ 350 mA 5mA ≤10 ≤ 500 mA 15 40 mV 20 60 mV 20 75 mV IO = 100 mA 250 400 mV IO = 200 mA 400 500 mV IO = 350 mA 450 600 mV IO = 500 mA 550 800 mV IO ≤ 10 mA, 0.2 0.5 mA IO = 100 mA 2 4 mA IO ≤ 200 mA 5 10 IO = 350 mA 12 Output Noise Voltage 10Hz-100kHz, COUT = 100µF 50 µV rms Output Bypass Capacitor ESR=0.1 to 10Ω 10 µF Ripple Rejection fO =120Hz Load Regulation Dropout Voltage Quiescent Current Maximum Operational Input Voltage Maximum Line Transient RL = 500Ω, VO ≤ 5.5V mA 80 dB 25 28 V 35 40 V T = 1ms, τ ≤100ms 2 Advanced Monolithic Systems mA http://www.ams-semitech.com AMS500 ELECTRICAL CHARACTERISTICS Electrical Characteristics at VIN =6V, VOUT =3V IO =5mA, TJ=25°C, R1 =27k, C2 = 2µF unless otherwise specified. PARAMETER AMS500-X CONDITIONS (Note 2) Units Min. Typ. Max. 1.20 1.235 1.27 V 1.180 1.235 1.290 V 24 V .02 1.5 mV/V Adjustable Version Reference Voltage IO ≤ 100 mA, -40°C ≤TJ ≤ 125°C, R1=27k, Measured from VOUT to Adj. Pin Output Voltage Range 2 Line Regulation 6V ≤VIN ≤ 25V Load Regulation 5mA ≤IO ≤ 100 mA 0.3 0.5 % 5mA ≤10 ≤ 200 mA 5mA ≤10 ≤ 350 mA 5mA ≤10 ≤ 500 mA 0.5 1 % 1.0 1.5 % 1.0 2.0 % IO = 100 mA 50 400 mV IO = 200 mA 300 500 mV IO = 350 mA Dropout Voltage 500 600 mV IO = 500 mA 600 800 mV IO = 0 mA, 0.18 0.5 mA IO = 100 mA 2.0 4 mA IO = 200 mA 5.0 10 mA IO = 350 mA 12 mA Output Noise Voltage 10Hz-100kHz 100 µVrms/V Output Bypass Capacitor ESR=0.1 to 10Ω 10 µF Long Term Stability T =1000hr 0.4 %/1000hr Ripple Rejection fO = 120Hz 0.02 dB 21 22 V 35 40 V Quiescent Current Maximum Operational Input Voltage Maximum Line Transient IO = 10mA, Reference Voltage ≤ 1.5V T = 1ms, τ ≤100ms On/Off Threshold Voltage VO = 3V 1.8 On 2.5 Off On/Off Threshold Current VOFF = 2.4V 1.5 2.0 35 V V 60 µA 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: 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. Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature TJ(MAX), the junction-to ambient thermal resistance θJ-A and the ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P(MAX) = TJ(MAX) - TA θJ - A Where the value of the junction-to-ambient thermal resistance are as follows: 195°C/W for TO-92 (N), 110°C/W for SOT-89 (L), 90°C/W for SOT-223 and 220°C/W for 5 lead SOT-23. 3 Advanced Monolithic Systems http://www.ams-semitech.com AMS500 PIN CONNECTIONS TO-92 Plastic Package (N) OUTPUT SOT-89 (L) 5 Lead SOT-23 (M1) INPUT INPUT 1 5 OUTPUT GROUND 2 4 ADJ / N/C ON/OFF 3 GND 1 INPUT 2 3 GND OUTPUT Bottom View Top View SOT-223 SOT-223 R= 1 INPUT 2 GND 3 1 2 3 OUTPUT GND OUTPUT Top View Top View INPUT Top View TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage IO = 200mA 0.3 IO = 150mA 0.2 IO = 100mA 0.1 0 0.6 6.0 0.5 5.0 OUTPUT VOLTAGE (V) IO = 350mA INPUT OUTPUT DIFFERENTIAL (V) INPUT OUTPUT DIFFERENTIAL (V) 0.5 0.4 Low Voltage Behavior Dropout Voltage 0.6 0.4 0.3 0.2 0.1 0 0 80 40 120 JUNCTION TEMPERATURE (° C) AMS500-3.3 IO = 500mA 4.0 3.0 2.0 0 0 100 200 300 400 500 OUTPUT CURRENT (mA) 600 4 Advanced Monolithic Systems http://www.ams-semitech.com 2.0 3.0 4.0 5.0 6.0 INPUT VOLTAGE (V) AMS500 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Output at Voltage Extremes Low Voltage Behavior 3.0 2.0 3.0 4.0 5.0 6.0 INPUT VOLTAGE (V) 3 2 1 0 Reference Voltage 1 0 0 10 20 30 40 50 60 INPUT VOLTAGE (V) Ripple Rejection 1.24 1.22 1.20 1.18 1.16 1.14 1.12 1.10 1000 800 RIPPLE REJECTION (dB) OUTPUT CURRENT (mA) TJ= 25°C 600 400 200 0 6 9 12 15 18 21 24 OUTPUT VOLTAGE (V) 0 20 10 INPUT VOLTAGE (V) C2 = 22µF TANTALUM 75 C2 = 100µF ALUM 70 65 60 55 IO= 10mA 50 45 30 1 Quiescent Current Quiescent Current 10 100 1k 10k 100k 1M FREQUENCY (Hz) Quiescent Current 25 17.5 IO= 10mA QUIESCENT CURRENT (mA) 15 12.5 10 7. 5 5. 0 2. 5 0 VIN = 6V 10 QUIESCENT CURRENT (mA) REFERENCE VOLTAGE (V) 2 80 1.26 3 3 85 AMS500 ADJUSTABLE 0 4 -1 -20 -10 0 10 20 30 40 50 60 INPUT VOLTAGE (V) 1200 1.28 RL=500mΩ Peak Output Current 1.30 QUIESCENT CURRENT (µA) 5 4 -1 -20 -10 0 AMS500-5.0 AMS500-3.3 RL=500mΩ OUTPUT VOLTAGE (V) 4.0 2.0 6 5 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) AMS500-5.0 IO = 500mA 5.0 -2.5 Output at Voltage Extremes 6 6.0 8 6 4 2 20 15 IO = 200mA 10 0 0 1 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 0 50 100 150 200 250 300 350 OUTPUT CURRENT (mA) 5 Advanced Monolithic Systems http://www.ams-semitech.com 3 ~ ~ ~ ~ 2 IO = 100mA IO = 50mA 1 IO = 0mA 0 -40 0 40 80 120 TEMPERATURE (° C) AMS500 APPLICATION NOTES Most type of tantalum or electrolytic capacitor can be used in the applications. A critical characteristic of the capacitors is an ESR value of 5Ω or less and a resonant frequency above 500kHz. The value of this capacitor can be increased without limits. For higher loads, the value of the capacitor should be increased, specialy when the output voltage is set for 2.5V or less. The AMS500 lowest fixed output voltage value is 2.0V Definition of Terms Dropout Voltage: The input-output voltage differential at which the circuit stops to regulate against further reduction in input voltage. Measured when the output voltage has dropped 100mV from the nominal voltage obtained at 1V input, dropout voltage is dependent upon load current and junction temperature. Input Voltage: The DC voltage applied to the input terminal with respect to ground. Input-Output Differential: The voltage difference between the unregulated input voltage and the regulated output voltage for which the regulator will regulate. Line Regulation: The change in output voltage for a change in the input voltage. The line regulation is measured under conditions of low dissipation or by using low duty cycle pulse testing such that the average chip temperature is not significantly affected. Load Regulation: The change in output voltage for a change in load current at constant chip temperature. Long term stability: Output voltage stability under accelerated life-test conditions after 1000 hours with maximum rated voltage and junction temperature. Output Noise Voltage: The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency range. Quiescent Current: That part of the positive input current that does not contribute to the positive load current. The regulator ground lead current. Ripple Rejection: The ratio of the peak-to –peak input ripple voltage to the peak-to-peak output ripple voltage at specified frequency. Temperature Stability of VO: The percentage change in output voltage for a thermal variation from room temperature to either temperature extreme. Typical application circuit (adjustable output) VIN 100k OUT ON/OFF 10µF AMS500 ADJUSTABLE R1 28k + ADJ ON GND C1 22µF R2 Minimum Load In circuits using the fixed output voltage versions, minimum load is not required. For circuits using the adjustable device, the value of R1 and R2 should be chosen such, that a current of approximately 40µA flows through the network. The reference voltage (1.235V) is measured between the adjust pin and VOUT. The output voltage can be set by the two resistors R1 and R2 using the following equation: R1 + R2 VO = VREF R1 External capacitor The AMS500 series require an output capacitor of 10µF or greater to ensure device stability. Without the capacitor the device may oscillate The value of R1 is recommended to be between 25kΩ to 30 kΩ, and the value of R2 will set the output voltage. 6 Advanced Monolithic Systems VOUT OFF http://www.ams-semitech.com AMS500 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. 3L TO-92 PLASTIC PACKAGE (N) 0.180±0.005 (4.572±0.127) 0.060±0.005 (1.524±0.127) DIA 0.060±0.010 (1.524±0.254) 0.90 (2.286) NOM 0.180±0.005 (4.572±0.127) 0.140±0.010 (3.556±0.127) 10° NOM 5° NOM 0.500 (12.70) MIN 0.050 (1.270) MAX UNCONTROLLED LEAD DIMENSIONS 0.015±0.002 (0.381±0.051) 0.016±0.003 (0.406±0.076) 0.050±0.005 (1.270±0.127) N (TO-92 ) AMS DRW# 042391 5 LEAD SOT-23 PLASTIC PACKAGE (M1) 0.110-0.120 (2.794-3.048) 0.102-0.118 (2.60-3.00) 0.059-0.070 (1.50-1.75) 0.014-0.020 (0.350-0.50) 0.037 (0.95) TYP 0.018-0.024 (0.457-0.610) 10° NOM 0.036-0.051 (0.090-1.30) 0.0035-0.0080 (0.090-0.20) 0.003 (0.150) MAX 10° NOM 0.075 (1.90) TYP 0.018-0.024 (0.457-0.610) (SOT-23-5 ) AMS DRW# 051001 7 Advanced Monolithic Systems http://www.ams-semitech.com AMS500 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued). SOT-89 PLASTIC PACKAGE (L) 0.173-0.181 (4.40-4.60) 0.055-0.063 (1.40-1.60) 0.014-0.017 (0.35-0.44) 0.064-0.072 (1.62-1.83) 0.155-0.167 (3.94-4.25) 0.084-0.090 (2.13-2.29) 0.090-0.102 (2.29-2.60) 0.035-0.047 (0.89-1.20) 0.059 (1.50) BSC 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56) L (SOT-89 ) AMS DRW# 042392 0.118 (3.00) BSC 3 LEAD SOT-223 PLASTIC PACKAGE 0.248-0.264 (6.30-6.71) 0.116-0.124 (2.95-3.15) 0.264-0.287 (6.71-7.29) 0.130-0.146 (3.30-3.71) 0.033-0.041 (0.84-1.04) 0.090 (2.29) NOM 10°-16° 10° MAX 0.071 (1.80) MAX 0.010-0.014 (0.25-0.36) 10°-16° 0.012 (0.31) MIN 0.025-0.033 (0.64-0.84) 0.025-0.033 (0.64-0.84) 0.181 (4.60) NOM (SOT-223 ) AMS DRW# 042292 8 Advanced Monolithic Systems http://www.ams-semitech.com