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APL5910 Datasheet(PDF) 4 Page - Anpec Electronics Coropration |
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APL5910 Datasheet(HTML) 4 Page - Anpec Electronics Coropration |
4 / 16 page Copyright © ANPEC Electronics Corp. Rev. A.2 - Aug., 2008 APL5910 www.anpec.com.tw 4 Electrical Characteristics (Cont.) Pin Description PIN NO. NAME FUNCTION 1 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. 2 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 left this pin open, an internal pull-up current (5 µA typical) pulls the EN voltage and enables the regulator. 3 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 4 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. 5 NC No Connection. 6 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 1A (max.) load current to loads. During shutdown, the output voltage is quickly discharged by an internal pull-low MOSFET. 7 FB Voltage Feedback Pin. Connecting this pin to an external resistor divider receives the feedback voltage of the regulator. Refer to the typical application circuits. These specifications apply over V CNTL=5V, VIN=1.5V, VOUT=1.2V, and TA= -40 ~ 85 oC, unless otherwise specified. Typical values are at T J=25 oC. APL5910 Symbol Parameter Test Conditions Min. Typ. Max. Unit PROTECTIONS TJ=25 οC 1.7 2.1 2.5 ILIM Current-Limit Level TJ= -40 ~ 125 οC 1.4 - - ISHORT Short Current-Limit Level VFB<0.2V - 0.4 - A Short Current-Limit Blanking Time From beginning of soft-start 0.6 1.6 - ms TSD Thermal Shutdown Temperature TJ rising - 170 - oC Thermal Shutdown Hysteresis - 50 - oC ENABLE AND SOFT-START EN Logic High Threshold Voltage VEN rising 0.5 0.8 1.1 V EN Hysteresis - 80 - mV EN Pull-High Current EN=GND - 5 - µA TSS Soft-Start Interval 0.3 0.6 1 ms POWER-OK AND DELAY VTHPOK Rising POK Threshold Voltage VFB rising 90 92 94 % POK Threshold Hysteresis - 8 - % POK Pull-Low Voltage POK sinks 5mA - 0.25 0.4 V POK Debounce Interval VFB<falling POK voltage threshold - 10 - µs POK Delay Time From VFB =VTHPOK to rising edge of the VPOK 1 2 4 ms |
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