DS2501 ADMOS | Alldatasheet

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Advanced Monolithic Systems, Inc. www.advanced - monolithic.com Phone (925) 443 - 0722 Fax (925) 443 - 0723 Advanced AMS2501/AMS2502 Monolithic 1A VERY LOW DROPOUT VOLTAGE REGULATORS Systems FEATURES APPLICATIONS

  • • Adjustable or Fixed Output •• High Efficiency Current Regulators
  • • Output Current of 1A •• Audio/Video/Modem Card Supply
  • • Low Dropout, typ. 200mV at 500mA Output Current •• Adjustable Power Supply
  • • Fast Transient Response •• Notebook/Personal Computer Supplies
  • • Remote Sense GENERAL DESCRIPTION The The AMS2501/AMS2502 series of adjustable and fixed low dropout voltage regulators are designed to provide 1A output current. The dropout voltage of the device is 100mV at light loads and rising to 200mV at 500mA output current. A second input voltage of 1 .2V or greater than the output is required to achieve this dropout. The AMS2501/AMS2502 can also be used as a single supply device by connecting pin1 and pin 8 together. In this case the dropout voltage will be typically 1.2V. New features have been added to the AMS2501: a remote Sense pin is brought out virtually eliminating output voltage variations due to load changes. AMS2502 has an additional feature of an On/Off pin to keep the device in stand - by mode. The typical load regulation, measured at the Sen se pin, for a load current step of 100mA to 1A is less than 1mV. The AMS2501/AMS2502 series has fast transient response. On the AMS2502 the reference voltage is brought out to allow the user to add a bypass capacitor for lower noise and transient response improvement. The AMS2501/AMS2502 series are ideal for generating supplies of 1.25V to 3V where both 5V and 3.3V supplies are available. The AMS2501/AMS2502 devices are offered in 8 lead SOIC package. ORDERING INFORMATION: PIN CONNECTIONS PACKAGE TYPE OPERATING JUNCTION

8 LEAD SO - 8 TEMPERATURE RANGE

AMS2501CS AMS2502CS 0 to 125 ° C AMS2501CS - 1.5 AMS2502CS - 1.5 0 to 125 ° C AMS2501CS - 1.8 AMS2502CS - 1.8 0 to 125 ° C AMS2501CS - 2.5 AMS2502CS - 2.5 0 to 125 ° C AMS25 01CS - 2.85 AMS2502CS - 2.85 0 to 125 ° C AMS2501CS - 3.0 AMS2502CS - 3.0 0 to 125 ° C AMS2501CS - 3.3 AMS2502CS - 3.3 0 to 125 ° C AMS2501CS - 3.5 AMS2502CS - 3.5 0 to 125 ° C AMS2501CS - 5.0 AMS2502CS - 5.0 0 to 125 ° C AMS2501 8L SOIC

6 ADJ/GND

Advanced Monolithic Systems, Inc. www.advanced - monolithic.com Phone (925) 443 - 0722 Fax (925) 443 - 0723 AMS2501/AMS2502 ABSOLUTE MAXIMUM RATINGS (Note 1) V POWER Input Voltage 7V Soldering information V CONTROL Input Voltage 13V Lead Temperature (10 sec) 260 °C Operating Junction Temperature Range Thermal Resistance Control Section 0 °C to 125 °C SO - 8 package ϕ JA = 160 °C/W Power Transistor 0 °C to 150 °C Storage temperature - 65 °C to +150 °C

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at I LOAD = 0 mA, and T J = +25°C unless otherwise specified. Paramet er Device Conditions Min Typ Max Units Reference Voltage AMS2501/AMS2502 V CONTROL = 2.75V, V POWER =2V, I LOAD = 10mA V CONTROL = 2.7V to 12V, V POWER =3.3V to 5.5V, I LOAD = 10mA to 1A 1.238 1.232 1.250 1.250 1.262 1.268 V V Output Voltage AMS2501/AMS2502 - 1.5 V CONTROL = 4V, V POWER =2.V, I LOAD = 0mA V CONTROL = 3V, V POWER =2.3V, I LOAD = 0mA to 1A 1.491 1.485 1.500 1.500 1.509 1.515 V V AMS2501/AMS2502 - 1.8 V CONTROL = 4V, V POWER =2.V, I LOAD = 0mA V CONTROL = 3V, V POWER =2.3V, I LOAD = 0mA to 1A 1.782 1.773 1.800 1.800 1.818 1.827 V V AMS2501/AMS2502 - 2.5 V CONTROL = 5V, V POWER =3.3V, I LOAD = 0mA V CONTROL = 4V, V POWER =3.3V, I LOAD = 0mA to 1A 2.485 2.475 2.500 2.500 2.515 2.525 V V AMS2501/AMS2502 - 2.85 V CONTROL = 5.35V, V POWER =3.35V, I LOAD = 0 mA V CONTROL = 4.4V, V POWER =3.7V, I LOAD = 0mA to 1A 2.821 2.833 2.850 2.850 2.879 2.867 V V AMS2501/AMS2502 - 3.0 V CONTROL = 5.5V, V POWER =3.5V, I LOAD = 0mA V CONTROL = 4.5V, V POWER =3.8V, I LOAD = 0mA to 1A 2.982 2.970 3.000 3.000 3.018 3.030 V V AMS2501/ AMS2502 - 3.3 V CONTROL = 5.8V, V POWER =3.8V, I LOAD = 0mA V CONTROL = 4.8V, V POWER =4.1V, I LOAD = 0mA to 1A 3.280 3.235 3.300 3.300 3.320 3.333 V V AMS2501/AMS2502 - 3.5 V CONTROL = 6V, V POWER =4V, I LOAD = 0mA V CONTROL = 5V, V POWER =4.3V, I LOAD = 0mA to 1A 3.47 9 3.430 3.500 3.500 3.521 3.535 V V AMS2501/AMS2502 - 5.0 V CONTROL = 7.5V, V POWER =5.5V, I LOAD = 0mA V CONTROL = 6.5V, V POWER =5.8V, I LOAD = 0mA to 1A 4.930 4.950 5.000 5.000 5.030 5.050 V V Line Regulation AMS2501/AMS2502 - 1.5/ - 3. 5/ - 5.0 I LOAD = 10 mA , 1.5V ≤ (V CONTROL - V OUT ) ≤ 12V 0.8V ≤ (V POWER - V OUT ) ≤ 5.5V 1 3 mV Load Regulation AMS2501/AMS2502 - 1.5/ - 3.5/ - 5.0 V CONTROL = V OUT + 2.5V, V POWER =V OUT + 0.8V, I LOAD = 10mA to 1A 5 mV Minimum Load Cu rrent AMS2501/AMS2502 V CONTROL = 5V, V POWER =3.3V, V ADJ = 0V (Note 3) 5 10 mA Control Pin Current (Note 4) AMS2501/AMS2502 - 1.5/ - 3.5/ - 5.0 V CONTROL = V OUT + 2.5V, V POWER =V OUT + 0.8V, I LOAD = 10mA 10 16 mA Ground Pin Current ( Note 4) AMS2501/AMS2502 - 1.5/ - 3.5/ - 5.0 V CONTROL = V OUT + 2.5V, V POWER =V OUT + 0.8V, I LOAD = 10mA 6 10 mA Adjust Pin Current AMS2501/AMS2502 V CONTROL = 2.75V, V POWER = 2.05V, I LOAD = 10mA 40 120 µA Current Limit AMS2501/AMS2 502 - 1.5/ - 3.5/ - 5.0 V POWER =V OUT + 0.8V 1.0 1.2 1.5 A Ripple Rejection AMS2501/AMS2502 - 1.5/ - 3.5/ - 5.0 V CONTROL = V POWER = V OUT + 2.5V, V RIPPLE = 1V P - P I LOAD = 1A 60 80 dB

Advanced Monolithic Systems, Inc. www.advanced - monolithic.com Phone (925) 443 - 0722 Fax (925) 443 - 0723 AMS2501/AMS2502 EL ECTRICAL CHARACTERISTICS Electrical Characteristics at I OUT = 0 mA, and T J = +25°C unless otherwise specified. Parameter Device Conditions Min Typ Max Units Thermal Regulation AMS2501/AMS2502 T A = 25°C, 30ms pulse, I LOAD = 1A 0.002 0.020 %W Dropout Voltage Note 2 Control Dropout (V CONTROL - V OUT ) AMS2501/AMS2502/ - 1.5/ - 3.5/ - 5.0 V POWER =V OUT + 0.8V, I LOAD = 10mA V POWER =V OUT + 0.8V, I LOAD = 1A 1.00 1.15 1.15 1.30 V V Power Dropout (V POWER - V OUT ) AM S2501/AMS2502/ - 1.5/ - 3.5/ - 5.0 V CONTROL =V OUT + 2.5V, I LOAD = 1A .05 .30 0.15 0.50 V V Parameters identified with boldface type apply over the full operating temperature range. Note 1: Absolute Maximum Ratings indicate limits be yond which damage to the device may occur. For guaranteed specifications and test conditions, see the Electrical Characteristics . The guaranteed specifications apply only for the test conditions listed. Note 2: Unless otherwise specified V OUT = V SENSE . For the adjustable device V ADJ = 0V. Note 3: The dropout voltage for the AMS2501/AMS2502 is caused by either minimum control voltage or minimum power voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation. N ote 4: For the adjustable device the minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. Note 5: The control pin current is the drive current required for the output transistor. This current will track output current with a ratio of about 1:100. The minimum value is equal to the quiescent current of the device. PIN FUNCTIONS V POWER (Pin 1): This pin is the collector to the power device of the AMS2501/AMS2502. The output load current is supplied through this pin. The voltage at this pin must be between 0.1V and 0.8V greater than the output voltage for the device to regulate. Output (Pin 2 and 3): These are the power output of the device. Pin 2 and 3 are fused together and with the package paddle serving also as heat sink. Sense (Pin 4): This pin is the positive side of the reference voltage for the device. With this pin it is possible to Kelvin se nse the output voltage at the load. On/Off (Pin 5 AMS2502 only): This pin puts the device in a stand - by mode. Reference (Pin 7 AMS2502 only): This pin allows the user to add a bypass capacitor on the reference voltage. Adjust (Pin 6): This pin is the n egative side of the reference voltage for the device. Adding a small bypass capacitor from the Adjust pin to ground improves the transient response. For fixed voltage devices the Adjust pin is also brought out to allow the user to add a bypass capacitor. GND (Pin 6): For fixed voltage devices this is the bottom of the resistor divider that sets the output voltage. V CONTROL (Pin 8): This pin is the supply pin for the control circuitry of the device. The current flow into this pin will be about 1% of the o utput current. The voltage at this pin must be between 1.0V and 1.3V greater than the output voltage for the device to regulate.

output and from the output to the input to prevent die over - stress. output without any device degradation. generate current large enough to do any damage. Figure 6. Optional Clamp Diodes Protect Against should not be exceeded under continuous normal load conditions. resistance from junction to ambient. in thermal resistance between the Control and Power sections . determined by the junction temperature of the Control section. power dissipation will be less than 0.5W. power in the output transistor and the power in the drive circuit. The power in the control circuit is negligibl e. PCB proper mounting is required.

Advanced Monolithic Systems, Inc. www.advanced - monolithic.com Phone (925) 443 - 0722 Fax (925) 443 - 0723 AMS2501/AMS2502 TYPICAL PERFORMANCE CHARACTERISTICS 0 0.4 0.8 1.2 0 0 CONTROL PIN CURRENT (mA) MINMUM CONTROL VOLTAGE (V CONTROL - V OUT )(V) 0.5 1.0 MINIMUM POWER VOLTAGE OUTPUT CURRENT (A) OUTPUT CURRENT (A) OUTPUT CURRENT (A) Control Pin Current vs Output Current Minimum Control Voltage Dropout Voltage - Minimum Power Voltage TYPICAL DEVICE T J = 25° CT J = 125° C T J = 125° C T J = 25° C Reference Voltage vs Temperature 1.242 1.244 1.246 1.248 1.250 1.252 1.254 1.256 1.258 -50 -25 0 25 50 75 100 125 150 REFERENCE VOLTAGE (V) TEMPERATURE (° C) Load Current Step Response 50 µ/DIV V OUT 50 µV/DIV 1.5A 400mA LOAD

Advanced Monolithic Systems, Inc. www.advanced - monolithic.com Phone (925) 443 - 0722 Fax (925) 443 - 0723 AMS2501/AMS2502 PACKAGE DIMENSIONS inches (millime ters) unless otherwise noted.

8 LEAD SOIC PLASTIC PACKAGE (S)

0°-8° TYP 0.010-0.020 (0.254-0.508) S (SO-8 ) AMS DRW# 042293 x 45° 0.016-0.050 (0.406-1.270) 0.008-0.010 (0.203-0.254) 0.004-0.010 (0.101-0.254) 0.014-0.019 (0.355-0.483) 0.053-0.069 (1.346-1.752) 0.050 (1.270) TYP 0.150-0.157** (3.810-3.988) 0.228-0.244 (5.791-6.197) 0.189-0.197* (4.801-5.004) *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 1 2 3 4 8 7 6 5