RT8206A/B
Power On from VIN
Power On from EN1
DEM Mode
VIN
(10V/Div)
EN1
(5V/Div)
LDO
(5V/Div)
VOUT1
(5V/Div)
REF
(2V/Div)
IL1
(2A/Div)
CP
(10V/Div)
PGOOD1
(5V/Div)
No Load, VIN = 12V, TON = VCC, EN1 = VCC
EN2 =GND, ENLDO = VIN
,
No Load, VIN = 12V,
TON = VCC, EN1 = VCC, EN2 = GND, ENLDO = VIN
Time (400μs/Div)
Time (1ms/Div)
Power On from EN1
Power On from EN1
PWM Mode
PWM Mode
EN1
(5V/Div)
EN1
(5V/Div)
VOUT1
(5V/Div)
VOUT1
(5V/Div)
IL1
(2A/Div)
IL1
(2A/Div)
PGOOD1
(5V/Div)
PGOOD1
(5V/Div)
ILOAD = 4A, VIN = 12V,
No Load, VIN = 12V,
TON = VCC, EN1 = VCC, EN2 = GND, ENLDO = VIN
TON = VCC, EN1 = VCC, EN2 = GND, ENLDO = VIN
Time (1ms/Div)
Time (1ms/Div)
Power On from EN2
Power On from EN2
DEM Mode
PWM Mode
EN2
(5V/Div)
EN2
(5V/Div)
VOUT2
(5V/Div)
VOUT2
(5V/Div)
IL2
(2A/Div)
IL2
(2A/Div)
PGOOD2
(5V/Div)
PGOOD2
(5V/Div)
No Load, VIN = 12V,
No Load, VIN = 12V,
TON = VCC, EN1 = GND, EN2 = VCC, ENLDO = VIN
TON = VCC, EN1 = GND, EN2 = VCC, ENLDO = VIN
Time (1ms/Div)
Time (1ms/Div)
DS8206A/B-03 December 2009
www.richtek.com
15
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
