s-8337aaca-t8t1g Seiko Instruments Inc., s-8337aaca-t8t1g Datasheet - Page 21

• Manufacturer Part Number: s-8337aaca-t8t1g
• Description: Step-up, 1.2 Mhz High-frequency, Pwm Control Switching Regulator Controller
• Manufacturer: Seiko Instruments Inc.

Rev.3.1
Standard Circuits
Caution
_00
STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER
C
C
IN
L
IN
The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
L
0.1 μF
M1
0.1 μF
M1
EXT
EXT
VIN
VIN
VSS
VSS
Figure 15 Standard Circuit (S-8337 Series)
Figure 16 Standard Circuit (S-8338 Series)
Timer latch
short-circuit
protection circuit
Timer latch
short-circuit
protection circuit
ON/OFF (S-8338)
Seiko Instruments Inc.
RDuty (S-8337)
CSP
UVLO
PWM
comparator
CSP
UVLO
PWM
comparator
+
−
CC
SD
+
−
CC
SD
Oscillator
Maximum duty circuit
RZ
CZ
Ground point
Oscillator
Maximum duty circuit
Reference voltage
(1.0 V)
soft-start circuit
CZ
RZ
Ground point
+
−
Reference voltage
(1.0 V)
soft-start circuit
Error amplifier
+
−
Error amplifier
ROSC
ROSC
FB
CFB
FB
RFB1
RFB2
S-8337/8338 Series
V
CFB
C
OUT
L
RFB1
RFB2
V
C
OUT
L
ROSC RDuty
ROSC
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