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5 Pin Configuration and Functions
DGQ
10-Pin
Top View
DRC
10-Pin
Top View
Pin Functions
PIN
I/O
DESCRIPTION
NAME
NO.
BP 9 O Regulator output pin. Connect a 1.0 μF bypass capacitor from this pin to GND. 穩壓器輸出引腳。 在此引腳與GND之間連接壹個1.0μF旁路電容。BP就是旁路（ByPass）的意思。
壹般是自舉電容之類的。由於芯片內部制造電容電感很困難（制造半導體器件如晶體管卻很容易），所以設計時把集成電路中需要接電容的地方用引腳引出來，在芯片外面接。所以越大的芯片引腳越多，四周放的電容也越多。
COMP 4 O Error amplifier output. Connect control loop compensation network between COMP pin and FB pin.
DIS/EN 3 I Disable pin. Pulling this pin high, places the part into a shutdown mode. Shutdown mode is characterized by a very low quiescent current. While in shutdown mode, the functionality of all blocks is disabled and the BP regulator is shut down. This pin has an internal 1 MΩ pull-down resistor to GND. Leaving this pin unconnected enables the device.
FB 5 I Error amplifier inverting input. Connect a voltage divider from the output to this pin to set output voltage. Compensation network is connected between this pin and COMP.
GDRV 8 O Connect the gate of the power N channel MOSFET to this pin.
GND 6 - Device ground.
ISNS 7 I Current sense pin. Connect an external current sensing resistor between this pin and GND. The voltage on this pin is used to provide current feedback in the control loop and detect an overcurrent condition. An overcurrent condition is declared when ISNS pin voltage exceeds the overcurrent threshold voltage, 150 mV typical.
RC 1 I Switching frequency setting pin. Connect a resistor from RC pin to VDD of the IC power supply and a capacitor from RC to GND.
SS 2 I Soft-start time programming pin. Connect capacitor from SS pin to GND to program converter soft-start time. This pin also functions as a timeout timer when the power supply is in an overcurrent condition.
VDD 10 I System input voltage. Connect a local bypass capacitor from this pin to GND. Depending on the amount of required slope compensation, this pin can be connected to the converter output. See?Application Informationsection for additional details.