S-8337AAAA-P8T1G Datasheet, PDF (22/51 Pages) Seiko Instruments Inc – SWITCHING REGULATOR CONTROLLER

STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8337/8338 Series
Rev.4.0_01
 Standard Circuits
L
VIN
M1
CIN
EXT
0.1 μF
SD
RDuty (S-8337)
ROSC
VOUT
UVLO
+
PWM ^−
comparator
Timer latch
short-circuit
protection circuit
Oscillator
Maximum duty circuit
+ _{Error amplifier}
−
Reference voltage
(1.0 V)
soft-start circuit
CFB RFB1
CL
FB
RFB2
ROSC RDuty
VSS
CSP
CC
RZ
CZ
Ground point
Figure 15 Standard Circuit (S-8337 Series)
L
VIN
M1
CIN
EXT
0.1 μF
SD
ON/OFF (S-8338)
ROSC
VOUT
UVLO
+
PWM ^−
comparator
Timer latch
short-circuit
protection circuit
Oscillator
Maximum duty circuit
+ _{Error amplifier}
−
Reference voltage
(1.0 V)
soft-start circuit
CFB RFB1
CL
FB
RFB2
ROSC
VSS
CSP
CC
RZ
CZ
Ground point
Figure 16 Standard Circuit (S-8338 Series)
Caution The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
22