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APL5930KAI-TRG Datasheet(PDF) 8 Page - Anpec Electronics Coropration |
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APL5930KAI-TRG Datasheet(HTML) 8 Page - Anpec Electronics Coropration |
8 / 17 page Copyright © ANPEC Electronics Corp. Rev. A.4 - Sep., 2009 APL5930 www.anpec.com.tw 8 Operating Waveforms (Cont.) Refer to the typical application circuit. The test condition is V IN=1.8V, VCNTL=5V, VOUT=1.2V, TA= 25 oC unless otherwise specified. CH1: V EN, 5V/Div, DC CH2: V OUT, 1V/Div, DC TIME: 2 µs/Div C OUT=10µF, CIN=10µF, RL=0.4Ω Shutdown I OUT V EN 1 4 2 3 V OUT V POK CH3: V POK, 5V/Div, DC CH4: I OUT, 2A/Div, DC CH1: V EN, 5V/Div, DC CH2: V OUT, 0.5V/Div, DC TIME: 0.5ms/Div C OUT=10µF, CIN=10µF, RL=0.4Ω Enable 1 4 2 3 I OUT V EN V OUT V POK CH3: V POK, 5V/Div, DC CH4: I OUT, 2A/Div, DC Pin Description PIN NO. NAME FUNCTION 1 GND Ground pin of the circuitry. All voltage levels are measured with respect to this pin. 2 FB Voltage Feedback Pin. Connecting this pin to an external resistor divider receives the feedback voltage of the regulator. 3,4 VOUT Output pin of the regulator. Connecting this pin to load and output capacitors (10 µF at least) is required for stability and improving transient response. The output voltage is programmed by the resistor-divider connected to FB pin. The VOUT can provide 3A (max.) load current to loads. During shutdown, the output voltage is quickly discharged by an internal pull-low MOSFET. 5 VIN Main supply input pin for voltage conversions. A decoupling capacitor ( ≥10µF recommended) is usually connected near this pin to filter the voltage noise and improve transient response. The voltage on this pin is monitored for Power-On-Reset purpose. 6 VCNTL Bias voltage input pin for internal control circuitry. Connect this pin to a voltage source (+5V recommended). A decoupling capacitor (1 µF typical) is usually connected near this pin to filter the voltage noise. The voltage at this pin is monitored for Power-On-Reset purpose. 7 POK Power-OK signal output pin. This pin is an open-drain output used to indicate the status of output voltage by sensing FB voltage. This pin is pulled low when output voltage is not within the Power-OK voltage window. 8 EN Active-high enable control pin. Applying and holding the voltage on this pin below the enable voltage threshold shuts down the output. When re-enabled, the IC undergoes a new soft-start process. When leave this pin open, an internal pull-up current (5 µA typical) pulls the EN voltage and enables the regulator. Exposed Pad - Connect this pad to system VIN plane for good thermal conductivity. |
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