2013/5/2

Rev.A.1

2

EM5301F/G

Pin Assignment

Pin Name Pin No.

Pin Function

BOOT

1

Bootstrap Supply for the floating upper gate driver. Connect the bootstrap

The bootstrap capacitor provides the charge to turn on the upper MOSFET. Typical

IC.

UGATE

2

Upper Gate Driver Output. Connect this pin to the gate of upper MOSFET. This pin

is monitored by the adaptive shoot-through protection circuitry to determine when

the upper MOSFET has turned off.

GND

3

Signal and Power Ground for the IC. All voltages levels are measured with respect

to this pin. Tie this pin to the ground island/plane through the lowest impedance

connection available.

LGATE

4

Lower Gate Driver Output. Connect this pin to the gate of lower MOSFET. This pin

is monitored by the adaptive shoot-through protection circuitry to determine when

the lower MOSFET has turned off.

VCC

5

Supply Voltage. This pin provides the bias supply for the EM5301F/G and the lower

gate driver. The supply voltage is internally regulated to 5VDD for internal control

circuit. Connect a well-decoupled 10V to 13.2V supply voltage to this pin. Ensure

that a decoupling capacitor is placed near the IC.

FB

6

Feedback Voltage. This pin is the inverting input to the error amplifier. A resistor

divider from the output to GND is used to set the regulation voltage.

COMP/

SD

7

Error Amplifier Output. This pin is the output of error amplifier and the

non-inverting input of the PWM comparator. Use this pin in combination with the

FB pin to compensate the voltage control feedback loop of the converter. Pulling

this pin lower than 0.2V disables the controller and causes the oscillator to stop,

the UGATE and LGATE outputs to be held low.

PHASE

8

PHASE Switch Node. Connect this pin to the source of the upper MOSFET and the

drain of the lower MOSFET. This pin is used as the sink for the UGATE driver, and to

monitor the voltage drop across the lower MOSFET for over current protection.

This pin is also monitored by the adaptive shoot-through protection circuitry to

determine when the upper MOSFET has turned off. A Schottky diode between this

pin and ground is recommended to reduce negative transient voltage which is

common in a power supply system.