s-8551 Seiko Instruments Inc., s-8551 Datasheet - Page 2
s-8551
Manufacturer Part Number
s-8551
Description
Step-down, Built-in Fet, Synchronous Rectification, Pwm Control Switching Regulators
Manufacturer
Seiko Instruments Inc.
Datasheet
1.S-8551.pdf
(26 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
s-8551AA-M5T1G
Manufacturer:
SEIKO
Quantity:
20 000
2
STEP-DOWN, BUILT-IN FET, SYNCHRONOUS RECTIFICATION, PWM CONTROL SWITCHING REGULATORS
S-8550/8551 Series
Block Diagram
*1. Parasitic diode
V
IN
C
IN
FB
Error amplifier
Reference
voltage
−
+
ON/OFF
circuit
ON/OFF
Seiko Instruments Inc.
PWM comparator
+
−
Current limit
circuit
UVLO
circuit
Figure 1
Triangular wave
PWM control
generation
circuit
circuit
IC internal
power supply
VIN
VSS
*1
*1
CONT
L
C
FB
Rev.2.1
R
R
FB1
FB2
V
OUT
C
OUT
_01
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