Fujitsu MB39A105 Electrical Characteristics, Parameter, Pin Conditions Value Unit Min Typ Max

MB39A105

■ELECTRICAL CHARACTERISTICS

(VCC = 3.3 V, Ta = +25 °C)

	Parameter		Symbol	Pin	Conditions		Value		Unit
				No		Min	Typ	Max
1. Under voltage
lockout		Threshold voltage	VTLH	3	VCC =	1.15	1.35	1.55	V
protection circuit
block [UVLO]
		Threshold voltage	VTH	2		0.95	1.00	1.05	V
		Short-circuit detection time	ΔVCSCP	2		0.15	0.20	0.25	V
		setting difference voltage
2. Short-circuit		Input source current	ICSCP	2	CSCP = 0.85 V	−1.76	−0.88	−0.44	∝A
protection block
		Reset voltage	VRST	3	VCC =	1.1	1.3	1.5	V
[SCP]
		SCPOD terminal output	ILEAK	4	SCPOD = 3.3 V		0	1.0	∝A
		leak current
		SCPOD terminal output on	RON	4	SCPOD = 1 mA		50	100	Ω
		resistor
3. Triangular		Oscillation frequency	fosc	5	RT = 7.5 kΩ	450	500	550	kHz
wave oscillator		Frequency temperature	ΔfOSC/	5	Ta = 0 °C to +85 °C		1*		%
block [OSC]		variation	fOSC
4. Soft-start block		Charge current	ICS	2	CSCP = 0 V	−16	−11	−6	∝A
[CS]
		Threshold voltage	VTH	1	FB = 0.5 V	0.495	0.5	0.505	V
		Input bias current	IB	1	−INE = 0 V	−120	−30		nA
		Voltage gain	AV	8	DC		70*		dB
5. Error amplifier		Frequency band width	BW	8	AV = 0 dB		1.1*		MHz
block [Error Amp]		Output voltage	VOH	8		1.17	1.27	1.37	V
			VOL	8			40	200	mV
		Output source current	ISOURCE	8	FB = 0.5 V		−80	−50	∝A
		Output sink current	ISINK	8	FB = 0.5 V	100	300		∝A
6. PWM compar-					RT = 7.5 kΩ				%
ator block		Maximum duty cycle	Dtr	5		85	90	95
[PWM Comp.]
					OUT = 0 V,
		Output source current	ISOURCE	5	Duty ≤ 5%		−400*		mA
					(t = 1/fosc⋅Duty)
7.Output block					OUT = 3.3 V,
[Drive]		Output sink current	ISINK	5	Duty ≤ 5%		400*		mA
					(t = 1/fosc⋅Duty)
		Output ON resistor	ROH	5	OUT = −15 mA		4.0*		Ω
			ROL	5	OUT = 15 mA		3.0	6.0	Ω
8. General block		Standby current	ICCS	3	RT = OPEN		0	10	∝A
		Power supply current	ICC	3	RT = 7.5 kΩ		1.2	1.8	mA

*: Standard design value.

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