RT8004A Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT8004A Datasheet PDF : 13 Pages
| |||
RT8004A
Functional Pin Description
Pin No.
TSSOP-16
(Exposed Pad)
VQFN-16L 4x4
Pin Name
Pin Function
1
15
VDD
Signal Input Supply. Decouple this pin to GND with a capacitor.
Normally VDD is equal to PVDD.
Power Good Indicator. This pin is an open-drain logic output that
2
16
PGOOD is pulled to ground when the output voltage is not within ±12.5%
of regulation point.
Error Amplifier Compensation Pin. The current comparator
3
1
COMP
threshold increases with this control voltage. Connect external
compensation elements to this pin to stabilize the control loop.
4
2
FB
Feedback Pin. Receives the feedback voltage from a resistive
voltage-divider connected across the output.
5
3
RT
6
4
S YNC
7
5
EN/SS
8, 17
(Exposed Pad)
6, 17
(Exposed Pad)
GND
9, 16
10,11, 14, 15
7, 14
8, 9, 12, 13
PVDD
LX
12, 13
10, 11
PGND
Oscillator Resistor Input. Connecting a resistor to ground from
this pin sets the switching frequency.
External Clock Synchronization Input. The internal oscillator can
be synchronized to an external clock applied to this pin. If not in
use, please connect this pin to VDD or GND.
Enable Control and Soft-Start Input. Forcing this pin below 0.5V
shuts down the RT8004A. In shutdown, all functions are
disabled, drawing < 1μA of supply current. A capacitor to ground
from this pin sets the ramp time to full output current.
Signal Ground. All small-signal components, compensation
components and the exposed pad on the bottom side of the IC
should connect to this ground, which in turn connects to PGND
at one point.
Power Input Supply. Decouple this pin to PGND with a capacitor.
Internal Power MOSFET Switch Output. Connect this pin to the
inductor.
Power Ground. Connect this pin close to the terminal of CIN and
COUT.
DS8004A-03 March 2011
www.richtek.com
3
Share Link: 