XC9235/XC9236/XC9237 Series
■BLOCK DIAGRAM
●XC9235 / XC9236 / XC9237
・●XXC9C29325/3X5C/92X3C69/2XC3962/37XC9237
A Series
・XC9235/XC9236/XC9237
Aシリーズ
B,C,E,Gシリーズ
B/C/E/G Series
Phase
Compensation
Phase
Compensation
Current Feedback
Current Limit
Current Feedback
Current Limit
VOUT
VOUT
VIN
CFB
CFB
Error Amp.
R2
R2
R1
Error Amp.
PWM
PWM
Comparator
Comparator
FB
Synch
Buffer
Drive
FB
Synch
Buffer
Drive
Logic
Logic
Lx
Lx
R1
VSHORT
VSHORT
VIN
Vref with
Soft Start,
CE
Vref with
Soft Start,
CE
PWM/PFM
Selector
PWM/PFM
Selector
CE/
Ramp Wave
Generator
OSC
Ramp Wave
Generator
OSC
UVLO Cmp
UVLO Cmp
UVLO
UVLO
R3
R4
R3
R4
VSS
VSS
CE/MODE
Control
Logic
CE/MODE
Control
Logic
CE/MODE
CE/MODE
・XC9235/XC9236/XC9237
●XC9235 / XC9236 / XC9237
D,Fシリーズ
D/F Series
Phase
Compensation
Current Feedback
Current Limit
FB
Error Amp.
PWM
Comparator
Synch
Buffer
Drive
Logic
Lx
VSHORT
VIN
Vref with
Soft Start,
CE
PWM/PFM
Selector
CE/
Ramp Wave
Generator
OSC
UVLO Cmp
UVLO
R3
R4
VSS
CE/MODE
Control
Logic
CE/MODE
NOTE: The signal from CE/MODE Control Logic to PWM/PFM Selector is being fixed to "L" level inside,
and XC9235 series chooses only PWM control.
The signal from CE/MODE Control Logic to PWM/PFM Selector is being fixed to "H" level inside,
and XC9236 series chooses only PWM/PFM automatic switching control.
Diodes inside the circuit are ESD protection diodes and parasitic diodes.
■ABSOLUTE MAXIMUM RATINGS
Ta=25℃
UNIT
PARAMETER
VIN Pin Voltage
SYMBOL
VIN
RATINGS
- 0.3 ~ 6.5
- 0.3 ~ VIN + 0.3 or 6.5V
- 0.3 ~ 6.5
- 0.3 ~ 6.5
- 0.3 ~ 6.5
±1500
V
V
Lx Pin Voltage
VLx
VOUT Pin Voltage
FB Pin Voltage
VOUT
VFB
V
V
CE / MODE Pin Voltage
Lx Pin Current
VCE
V
ILx
mA
Power Dissipation
SOT-25
USP-6C
250
Pd
mW
(*Ta=25℃)
100
Operating Temperature Range
Storage Temperature Range
Topr
Tstg
- 40 ~ + 85
- 55 ~ + 125
OC
OC
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