Fujitsu MB3891 manual ΔVBAT2, LDO6 ΔV-BACKUP Backup, RMS Backup = 1 ∝F, Δref-Out, Rms, Simprog = L

MB3891

(Ta = +25 °C, VBAT1 to VBAT4 = VCC-VSIM = 3.6 V)

Parameter		Symbol	Pin No.	Conditions		Value		Unit
					Min.	Typ.	Max.
	Output voltage	VO	21	−10 ∝A > V-BACKUP	2.000	2.100	2.200	V
				> −250 ∝A
	Line regulation	Line	21	3.1 V < VBAT2 < 5.5 V			10	mV
	Load regulation	Load	21	−10 ∝A > V-BACKUP			30	mV
				> −250 ∝A
	Ripple rejection
	ΔVBAT2/	R.R	21	f = 217 Hz	25			dB
LDO6	ΔV-BACKUP
(V-BACKUP)	GND current at	IGND	19	V-BACKUP > −10 ∝A			10	∝A
	low load
	GND current at	IGND	19	V-BACKUP = −250 ∝A			50	∝A
	max. load
	Output noise volt.	VNOVL	21	f = 10 Hz to 1 MHz,			500	∝V
	(RMS)			V-BACKUP = 1 ∝F
	Reverse current	IRC	21	VBAT2 = 0 V,			100	nA
				V-BACKUP = 3.0 V
	Output voltage	VO	24	0 ∝A > REF-OUT > −50 ∝A	1.200	1.225	1.250	V
	Line regulation	Line	24	3.1 V < VBAT2 < 5.5 V			10	mV
	Load regulation	Load	24	0 ∝A > REF-OUT > −50 ∝A			6	mV
REF-OUT	Ripple rejection
	ΔVBAT2/	R.R	24	f = 217 Hz	50			dB
	ΔREF-OUT
	Output noise volt.	VNOVL	24	f = 10 Hz to 1 MHz,			250	∝V
	(RMS)			REF-OUT = 27 nF
		VO	29	−50 ∝A > VSIMOUT > −10 mA,	4.600	5.000	5.400	V
	Output voltage			SIMPROG = “H”
VSIMOUT		VO	29	−50 ∝A > VSIMOUT > −10 mA,	2.760	3.000	3.240	V
chargepump				SIMPROG = “L”
	Line regulation	Line	29	3.1 V < VCC-VSIM < 5.5 V			50	mV
	Load regulation	Load	29	−50 ∝A > VSIMOUT > −10 mA			100	mV

(Continued)

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