Fujitsu MB39A105 manual Equivalent Circuit

Page 16

MB39A105

■I/O EQUIVALENT CIRCUIT

〈〈Soft-start block (CS) 〉〉

〈〈Short-circuit protection circuit block (SCP) 〉〉

VCC 3

ESD protection element

GND 6

ESD

protection

element

2 CSCP

ESD

protection

element

VCC
CSCP		+	4	SCPOD
	1.0 V	−	4	SCPOD
		−

GND

〈〈Triangular wave oscillator block (RT) 〉〉

VCC
0.33 V	+
	−
	7	RT
GND

〈〈Error amplifier block〉〉

VCC
(1.27 V)
−INE	1	CS
		0.5 V	8	FB
GND

〈〈Output block〉〉

VCC

5 OUT

GND

16

Image 16

Contents Description FeaturesPackage PIN Assignment Pin No Symbol Descriptions PIN DescriptionBlock Diagram Parameter Symbol Condition Rating Unit Min Max Parameter Symbol Condition Value Unit Min TypAbsolute Maximum Ratings Recommended Operating ConditionsParameter Electrical CharacteristicsPin Conditions Value Unit Min Typ Max Typical Characteristics ErrorTriangularwave oscillation Power Dissipation vs. Ambient Temperature Error amplifier block Error Amp1, Error Amp2 FunctionsTriangular-wave oscillator block OSC PWM comparator block PWM CompPower Timer-latch short-circuit protection circuit SCPUnder voltage lockout protection circuit Uvlo Short-circuit protection detection output functionSetting the Output Voltage Setting the Triangular Oscillation FrequencySetting the SOFT-START Times Timer-latch short-circuit protection circuit MB39A105 Equivalent Circuit Application Parts List Parts NoSelection of Components 2I OV O 2LV O Peak-to-peak value ESR Reference Data Usage Precaution Ordering InformationDo not apply negative voltages Part number Package RemarksPackage Dimension IndexFujitsu Limited