APL5934
Pin Description
PIN
NO.
TDFN3x3-10
FUNCTION
SOP-8P
TDFN2x2-8
APL5934E
NAME
APL5934B/D APL5934/C APL5934B/D APL5934/C
Ground pin of the circuitry.
8
7
1
2
-
-
-
GND
FB
All voltage levels are measured with
respect to this pin.
Voltage Feedback Pin. Connecting this pin
to an external resistor divider receives the
feedback voltage of the regulator.
4
2
3
Output pin of the regulator. Connecting
this pin to load and output capacitors
(10mF at least) is required for stability and
improving transient response. The output
voltage
is
programmed
by
the
6
3,4
1,2,3
3,4,5
1,2
VOUT
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.
Main supply input pin for voltage
conversions.
A
decoupling capacitor
(³ 10mF recommended)
is usually
3
5
7,8,9
6,7,8
6,7
VIN
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.
Bias voltage input pin for internal control
circuitry. Connect this pin to a voltage
source (+5V recommende-
4
1
6
7
10
10
8
4
VCNTL
d). A decoupling capacitor (0.1mF typical)
is usually connected near this pin to filter
the voltage noise. The voltage at this pin is
m onitored for Power-On-Reset purpose.
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.
5
1
POK
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/low
2
8
6
-
9
-
5
-
EN
current (3mA typical) pulls the EN voltage
and enables/shuts down the regulator.
5
-
NC
GND
-
No Connection.
Ground pin of the circuitry. Connect the
exposed pad to the system ground plan
with large copper area for dissipating heat
into the ambient air.
Exposed Pad
-
-
Exposed Pad Exposed Pad Exposed Pad
Connect this pad to system VIN or ground
plane for good thermal conductivity.
Exposed Pad
-
-
-
Copyright ã ANPEC Electronics Corp.
7
www.anpec.com.tw
Rev. A.6 - Apr., 2018