Product specifications

3/22
XC9220/XC9221
Series
●XC9220/21A and C series ● XC9220/21B and D series
PRODUCT TYPE
IC OPERATION
H Operation ON
L Operation OFF
A B C D
Soft-start externally set No Yes No Yes
Integral protection function Yes Yes No No
PARAMETER SYMBOL RATINGS UNITS
VIN Pin Voltage VIN
-0.3 ∼ +18.0
V
FB Pin Voltage VFB
-0.3 ∼ +18.0
V
CE/CSS Pin Voltage CE
-0.3 ∼ +18.0
V
EXT/ Pin Voltage VEXT - 0.3 ~ VIN + 0.3 V
EXT/ Pin Current IEXT + 100 mA
SOT-25 250
Power Dissipation
USP-6C
Pd
120
mW
Operating Ambient Temperature Topr - 40 ~ + 85
O
C
Storage Temperature Tstg - 55 ~ +125
O
C
■
A
BSOLUTE MAXIMUM RATINGS
Ta = 25
O
C
■BLOCK DIAGRAMS
PWM/PFM Control LOGIC
OSC Enable
FB
Err Amp
+
-
+
-
VREF
0.9V
Buffer
EXT
/
VIN
VSS
CE/CSS
Chip Enable
Soft Start
(internal)
LOGIC
Each circuit
Under Voltage
Lock Out
Short Circuit
Protection
MaxDutyLimit
Protection
Ramｐ
Wave
OSC
RS Latch
R
S
Q
CE
OE
Frequency :
1 MHz , 500 kHz , 300 kHz
Each circuit
PWM Wave
(XC9221series)
U.V.L.O
PWM
Comparator
* Diodes inside the circuits are ESD protection diodes and parasitic diodes.
■ FUNCTIONS
CHIP ENABLE