SWITCHING REGULATOR. S-8550 Datasheet

S-8550 REGULATOR. Datasheet pdf. Equivalent

Part S-8550
Description SWITCHING REGULATOR
Feature S-8550 Series www.ablicinc.com © ABLIC Inc., 2007-2015 STEP-DOWN, BUILT-IN FET, SYNCHRONOUS RECTIF.
Manufacture ABLIC
Datasheet
Download S-8550 Datasheet

Rev.2.1_01 www.DataSheet4U.com STEP-DOWN, BUILT-IN FET, SYN S-8550 Datasheet
S-8550 Series www.ablicinc.com © ABLIC Inc., 2007-2015 STE S-8550 Datasheet
Recommendation Recommendation Datasheet S-8550 Datasheet





S-8550
S-8550 Series
www.ablicinc.com
© ABLIC Inc., 2007-2015
STEP-DOWN, BUILT-IN FET, SYNCHRONOUS
RECTIFICATION, PWM CONTROL SWITCHING REGULATORS
Rev.5.0_02
The S-8550 Series is a CMOS synchronous rectification step-down switching regulator which mainly consists of a
reference voltage circuit, an oscillator, an error amplifier, a phase compensation circuit, a PWM controller, an under
voltage lockout circuit (UVLO), a current limit circuit, and a power MOS FET. The oscillation frequency is high at 1.2 MHz,
so a high efficiency, large output current, step-down switching regulator can be achieved by using small external parts.
The built-in synchronous rectification circuit makes achieving high efficiency easier compared with conventional step-down
switching regulators. A ceramic capacitor can be used as an output capacitor. High-density mounting is supported by
adopting packages small SOT-23-5 and super-small and thin SNT-8A.
Features
Oscillation frequency:
1.2 MHz
Input voltage range:
2.0 V to 5.5 V
Output voltage range:
Arbitrarily settable by external output voltage setting resistor
Output current:
600 mA
Reference voltage:
0.6 V 2.0%
Efficiency:
92%
Soft-start function:
1 ms typ.
Shutdown function:
Shutdown current consumption : 1.0 A max.
Built-in current limit circuit
Pch power MOS FET on-resistance:
0.4 typ.
Nch power MOS FET on-resistance:
0.3 typ.
Constant continuous mode operation (no light load mode)
Lead-free, Sn 100%, halogen-free*1
*1. Refer to “Product Name Structure” for details.
Applications
Mobile devices, such as mobile phones, Bluetooth devices, wireless devices, digital audio players, digital still
cameras, portable DVD players, and portable CD players
Packages
SOT-23-5
SNT-8A
1



S-8550
STEP-DOWN, BUILT-IN FET, SYNCHRONOUS RECTIFICATION, PWM CONTROL SWITCHING REGULATORS
S-8550 Series
Rev.5.0_02
Block Diagram
1. SOT-23-5
FB
VIN CIN
Error amplifier
Current limit
circuit
IC internal
power supply
Reference
voltage
PWM control
circuit
PWM comparator
Triangular wave
generation
circuit
ON/OFF
circuit
UVLO
circuit
VIN
*1
CONT
L
*1 CFB
VOUT
RFB1
COUT
RFB2
*1. Parasitic diode
ON/OFF
Figure 1
VSS
2. SNT-8A
FB
VIN CIN
Error amplifier
Current limit
circuit
IC internal
power supply
Reference
voltage
PWM control
circuit
PWM comparator
Triangular wave
generation
circuit
ON/OFF
circuit
UVLO
circuit
VIN
*1
CONT
L
*1 CFB
VOUT
RFB1
COUT
RFB2
*1. Parasitic diode
ON/OFF
VSS PVSS
Figure 2
2





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