S-8550AA-M5T1G Seiko Instruments, S-8550AA-M5T1G Datasheet - Page 2

• Manufacturer Part Number: S-8550AA-M5T1G
• Description: IC, SYNC STEP-DOWN REGULATOR, SOT-23-5
• Manufacturer: Seiko Instruments

Specifications of S-8550AA-M5T1G

• Primary Input Voltage: 5.5V
• No. Of Outputs: 1
• Output Voltage: 4V
• Output Current: 600mA
• No. Of Pins: 5
• Operating Temperature Range: -40°C To +85°C
• Operating Temperature Min: 85°C
• Input Voltage: 5.5 V
• Duty Cycle (max): 100 %
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-23-5
• Minimum Operating Temperature: - 40 C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2
STEP-DOWN, BUILT-IN FET, SYNCHRONOUS RECTIFICATION, PWM CONTROL SWITCHING REGULATORS
S-8550/8551 Series
1. SOT-23-5
Block Diagram
2. SNT-8A
*1. Parasitic diode
*1. Parasitic diode
V
V
IN
IN
C
C
IN
IN
FB
FB
Error amplifier
Error amplifier
Reference
voltage
Reference
voltage
−
+
−
+
ON/OFF
ON/OFF
circuit
circuit
ON/OFF
ON/OFF
Seiko Instruments Inc.
PWM comparator
PWM comparator
+
+
−
−
Current limit
Current limit
circuit
circuit
UVLO
circuit
UVLO
circuit
Figure 1
Figure 2
Triangular wave
Triangular wave
PWM control
PWM control
generation
generation
circuit
circuit
circuit
circuit
IC internal
power supply
IC internal
power supply
VSS
VIN
VIN
VSS
PVSS
*1
*1
*1
*1
CONT
CONT
L
L
C
C
FB
FB
Rev.4.0
R
R
R
R
FB1
FB2
FB1
FB2
V
V
OUT
OUT
C
C
OUT
OUT
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