RT6908
VGL Output Voltage vs. Temperature
Power On Sequence 1
-3
-4
-5
-6
-7
-8
VEN
(5V/Div)
VCORE
(1V/Div)
VI/O
(2V/Div)
VRSTB
(2V/Div)
VIN = 12V, VCORE = 1.1V, VI/O = 3.3V, C17= 22nF
Time (1ms/Div)
VIN = 12V, VGL = −6V
50 75 100 125
-50
-25
0
25
Temperature (°C)
Power On Sequence 2
Boost Load Transient Response
VAVDD
(10V/Div)
VAVDD_ac
(500mV/Div)
VGH
(20V/Div)
VGL
(5V/Div)
IAVDD
(1A/Div)
VRSTB
(2V/Div)
VIN = 12V, VAVDD = 15.6V,
VI/O = 35.5V, VGL = -6V, C17= 22nF
VIN = 12V, VAVDD = 15.6V,
R22 = 220kΩ, C30 = 330pF, C31= 10pF
Time (100ms/Div)
Time (500μs/Div)
Buck1 Load Transient Response
Buck2 Load Transient Response
VI/O_ac
VCORE_ac
(100mV/Div)
(100mV/Div)
II/O
ICORE
(1A/Div)
(1A/Div)
VIN = 12V, VCORE = 1.1V, R23 = 24kΩ,
VIN = 12V, VI/O = 3.3V, R4 = 120kΩ, C19 = 470nF
Time (500μs/Div)
C25 = 1nF, C26 = 10pF, R14 = 1.2kΩ, C23 = 470pF
Time (500μs/Div)
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12
DS6908-01 March 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
