APW7060 データシートの表示（PDF） - Anpec Electronics
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APW7060 Datasheet PDF : 16 Pages
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APW7060
Functional Pin Description
LGATE (Pin 1)
This pin provides the gate drive signal for the low side
MOSFET .
GND (Pin 2, 3)
Signal and power ground for the IC. All voltage levels
are measured with respect to this pin. Tie this pin to
the ground plane through the lowest impedance con-
nection available.
5VCC (Pin 4)
This is the main bias supply for the DC/DC controller
and its low side MOSFET driver. Must be closely
decoupled to GND (Pin 2,3). The voltage at this pin is
monitored for undervoltage lockout (UVLO) purposes.
DO NOT apply a voltage greater than 5.5V to this pin.
DRIVE2 (Pin 5)
This pin provides the gate drive voltage for the linear
regulator N-channel MOSFET pass transistor. It also
provides a means of compensating the linear control-
ler for applications where the user needs to optimize
the regulator transient response.
NC (Pin 7, 8, 10, 11, 12)
No internal connection.
FB (Pin 9)
This pin is the inverting input of the internal error am-
plifier of the buck controller. Connect this pin to the
output (VOUT1) of the DC/DC converter via a proper sized
resistor divider to form a complete feedback loop. The
VOUT1 is determined using the following formula :
VOUT1=0.8V
x
(1+
R1
R2
)
where R1 is the resistor connected from VOUT1 to FB,
and R2 is the resistor connected from FB to GND.
This pin is also monitored for under-voltage events.
12VCC (Pin 13)
This pin provides the supply voltage to the high side
MOSFET driver and the linear controller. A voltage no
greater than 13V can be connected to this pin. The
voltage at this pin is monitored for undervoltage lock-
out (UVLO) purposes.
UGATE (Pin 14)
FB2 (Pin 6)
Connect this pin to the output (VOUT2) of the linear
regulator via a proper sized resistor divider. The volt-
age at this pin is regulated to 0.8V and the VOUT2 is
determined using the following formula :
R7
VOUT2=0.8V x (1+ R8 )
This pin provides gate drive for the high-side MOSFET.
where R7 is the resistor connected from VOUT2 to FB2,
and R8 is the resistor connected from FB2 to GND.
This pin is also monitored for under-voltage events.
Pulling and holding FB2 above 1.28V shuts down both
regulators. Releasing FB2 initiates soft-start on both
regulators.
Copyright ANPEC Electronics Corp.
6
Rev. A.3 - Oct., 2003
www.anpec.com.tw
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