RT9045 Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT9045 Datasheet PDF : 12 Pages
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VIN = 1.8V/1.5V/1.35V/1.2V VCNTL = 5V
0.9V/0.75V/0.675V/0.6V
VIN VCNTL
RT9045
REFEN
VOUT
GND
VOUT
A
IL
COUT V
Figure 3. Current Limit for High Side, ILIM
RT9045
Power Supply
with Current Limit
VIN = 1.8V1.5V/1.35V/1.2V
VCNTL = 5V
VIN
VCNTL
0.9V/0.75V/0.675V/0.6V
RT9045
REFEN
VOUT
GND
A
IL
VOUT
COUT V
Figure 4. Current Limit for Low Side, ILIM
VIN = 1.8V/1.5V/1.35V/1.2V
VCNTL = 5V
0.9V/0.75V/0.675V/0.6V
VREFEN
0.15V
0.9V/0.75V
VOUT
0V
RL and COUT
Time delay
VIN
VCNTL
RT9045
REFEN
VOUT
GND
RL
VOUT
COUT V
VOUT would be low if VREFEN < 0.15V
VOUT would be high if VREFEN > 0.4V
Figure 5. REFEN Pin Shutdown Threshold, VIH & VIL
DS9045-04 August 2011
www.richtek.com
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