s-8337aaca-t8t1g Seiko Instruments Inc., s-8337aaca-t8t1g Datasheet - Page 2

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

2
STEP-UP, 1.2 MHz HIGH-FREQUENCY, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8337/8338 Series
Block Diagram
C
IN
L
M1
EXT
VIN
VSS
Timer latch
short-circuit
protection circuit
RDuty (S-8337) or
ON/OFF (S-8338)
Seiko Instruments Inc.
Figure 1 Block Diagram
CSP
UVLO
PWM
comparator
+
−
SD
CC
Oscillator
Maximum duty circuit
RZ CZ
Reference voltage
(1.0 V) soft-start
circuit
+
−
Error amplifier
ROSC
FB
CFB
RFB1
RFB2
V
C
OUT
L
Rev.3.1
_00