Fujitsu MB3891 manual Npn, IC internal LDO1, Waveform at rapid change of output load LDO2

MB3891

Output voltage VOUT1 (V)

Waveform at rapid change of output load (LDO1)

	OUT1		C(V)
2.0
1.5			V
1.0	VC		voltage
0.5		2
			Collector
0.0	Ta = +25°C	1
	VBAT = 3.6 V
	CONT1 = “L”	0
	CONT6 = OPEN		NPN
	OUT1 = −120 mA 0 A

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

[Measurement diagram]

VBAT = 3.6 V

VREF = 1.225 V

(IC internal) LDO1

OUT1 120 mA

1 ∝F VC

4V

0V

t (ms)

Waveform at rapid change of output load (LDO2)

(V)	3.0
OUT2	2.5							OUT2					(V)
								Ta = +25°C
voltageV	2.0							VBAT = 3.6 V					voltageVC
								CONT1 = “L”
	1.5							CONT2 = “H”				3
	1.0							CONT6 = OPEN				2
Output													Collector
	0.5							VC				1
	0.0											0
													NPN
				OUT2 = 0 A			−50 mA
	0	10	20	30	40	50	60	70	80	90	100

t (∝s)

Waveform at rapid change of output load (LDO2)

(V)	3.0
OUT2	2.5						OUT2						(V)
voltageOutputV	2.0												voltageCollectorVC
	1.5							VC				3
	1.0							Ta = +25°C				2
	0.5											1
								VBAT = 3.6 V
	0.0							CONT1 = “L”				0
								CONT2 = “H”
				OUT2 = −50 mA				CONT6 = OPEN					NPN
								0 A
	0	10	20	30	40	50	60	70	80	90	100
					t (ms)

[Measurement diagram]

VBAT = 3.6 V

VREF = 1.225 V
(IC internal)	LDO2	OUT2 50 mA
		1 ∝F VC

4 V

0 V

[Measurement diagram]

VBAT = 3.6 V

VREF = 1.225 V

(IC internal) LDO2 OUT2 50 mA

1 ∝F VC

4 V

0 V

(Continued)

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