S-8333CAAA-I8T1U Datasheet, PDF (2/44 Pages) Seiko Instruments Inc – PWM CONTROL SWITCHING REGULATOR CONTROLLER

STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333 Series
Rev.4.2_01
 Block Diagram
L
VIN
M1
C_IN
EXT
SD
RDuty
ROSC
UVLO
+
PWM ^−
comparator
Timer latch
short-circuit
protection circuit
Oscillator
Maximum duty
soft-start circuit
+ _{Error amplifier}
−
Reference voltage
(1.0 V) soft-start
circuit
VSS
CSP
CC
RZ CZ
Figure 1 Block Diagram
V_OUT
CFB RFB1
C_L
FB
RFB2
2