ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Fast Transient Response. Guaranteed Dropout Voltage at Multiple. Load Regulation : 0. Line Regulation : 0. Low Dropout Voltage : 1.
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Line Regulation : 0. Low Dropout Voltage : 1. Adjustable Output : 1. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications , the APL has been optimized.
The device is available in an adjustable version and fixed output voltages of 1. The output available voltage range of an adjustable version is from 1. Dropout voltage is guaranteed at a maximum of 1. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures. Load line regulations are measured at a constant junction temperature by low duty cycle pulse testing.
Note 2 : Dropout voltage is specified over the full output current range of the device. Test points and limits are also shown on the Dropout Voltage curve. Note 3 : Minimum load current is defined as the minimum output current required to maintain regulation. F C2 R1 ?
F V OUT ? F R2 ? F 1k Copyright? S Time? S Dropout Voltage vs. Output Current 1. Input Voltage 3. Input Current vs. Input Voltage 6 Current Limit vs. Input Voltage 2. Temperature 2. Adjustable Pin Current vs. Temperature 1. By placing a resistor between these two terminals, a constant Current is caused to flow through R1 and down through R2 to set the overall output voltage.
Normally this current is chosen to be the specified minimum load current of 10mA. For fixed voltage devices R1 and R2 are included in the device. Tantalum, or aluminum electrolytic capacitors can be used for bypassing. Basic Adjustable Regulator ues will improve ripple rejection by bypassing the input to the regulator.
Load Regulation When the adjustable regulator is used. Load regulation will be limited by the resistance of the wire connecting the regulator to the load. The data sheet specification for load regulation is measured at the output pin of the device.
Best load regulation is obtained when the top of the resistor divider R1 is tied directly to the output pin of the device, not to the load. For fixed voltage devices the top of R1 is internally connected to the output, and the ground pin can be connected to low side of the load. Proper capacitor selection is important to ensure proper operation. The APL output capacitor selection is dependent upon the ESR equivalent series resistance of the output capacitor to maintain stability.
When the output capacitor is 10uF or greater, the output capacitor should have an ESR less than 1?. This will improve transient response as well as promote stability. A low-ESR solid tantalum capacitor works extremely well and provides good transient response and stability over temperature.
Output Capacitor Cont. The value of the output capacitor can be increased without limit. Higher capacitance values help to improve transient response and ripple rejection and reduce output noise. It can be used as a rough guideline in estimating thermal resistance. With a 22? F bypassing capacitor 75dB ripple rejection is obtainable at any output level. R1 is normally in the range of ? The size of the required adjust pin capacitor is a function of the input ripple frequency.
To optimize the heat sinking ability of the plane and PCB, solder the tab of the package to the plane. Thermal Considerations Cont. Some experimentation will be necessary to determine the actual value. Package Reflow Conditions pkg. Head Office : 5F, No. Tel : Fax : Copyright?
APL1117 Regulator. Datasheet pdf. Equivalent
Fast Transient Response order to obtain lower dropout voltage and faster tran-? Guaranteed Dropout Voltage at Multiple Currents sient response, which is critical for low voltage applications , the APL has been optimized. The device is available in an adjustable version and fixed? Load Regulation : 0. Line Regulation : 0. The output available voltage range of an adjustable version is from 1. Low Dropout Voltage : 1.
Fixed 1. General Description. SOT Power Packages. RoHS Compliant. The APL is a low dropout three-terminal adjustable. In order to.