Datasheet Texas Instruments LM3940

Manufacturer	Texas Instruments
Series	LM3940

1A Low Dropout Regulator for 5V to 3.3V Conversion

Datasheets

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PDF, 1.9 Mb, Revision: G, File published: Feb 16, 2015

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Prices

Status

	LM3940IMP-3.3	LM3940IMP-3.3/NOPB	LM3940IMPX-3.3	LM3940IMPX-3.3/NOPB	LM3940IS-3.3	LM3940IS-3.3/NOPB	LM3940ISX-3.3	LM3940ISX-3.3/NOPB	LM3940IT-3.3	LM3940IT-3.3/NOPB
Lifecycle Status	NRND (Not recommended for new designs)	Active (Recommended for new designs)	NRND (Not recommended for new designs)	Active (Recommended for new designs)	NRND (Not recommended for new designs)	Active (Recommended for new designs)	NRND (Not recommended for new designs)	Active (Recommended for new designs)	NRND (Not recommended for new designs)	Active (Recommended for new designs)
Manufacture's Sample Availability	Yes	No	No	No	Yes	Yes	No	Yes	No	Yes

Packaging

	LM3940IMP-3.3	LM3940IMP-3.3/NOPB	LM3940IMPX-3.3	LM3940IMPX-3.3/NOPB	LM3940IS-3.3	LM3940IS-3.3/NOPB	LM3940ISX-3.3	LM3940ISX-3.3/NOPB	LM3940IT-3.3	LM3940IT-3.3/NOPB
N	1	2	3	4	5	6	7	8	9	10
Pin	4	4	4	4	3	3	3	3	3	3
Package Type	DCY	DCY	DCY	DCY	KTT	KTT	KTT	KTT	NDE	NDE
Industry STD Term	SOT-223	SOT-223	SOT-223	SOT-223	TO-263	TO-263	TO-263	TO-263	TO-220	TO-220
JEDEC Code	R-PDSO-G	R-PDSO-G	R-PDSO-G	R-PDSO-G	R-PSFM-G	R-PSFM-G	R-PSFM-G	R-PSFM-G	R-MSFM-P	R-MSFM-P
Package QTY	1000	1000	2000	2000	45	45	500	500	45	45
Carrier	LARGE T&R	LARGE T&R	LARGE T&R	LARGE T&R	TUBE	TUBE	LARGE T&R	LARGE T&R	TUBE	TUBE
Device Marking	L52B	L52B	L52B	L52B	-3.3 P+	-3.3 P+	-3.3 P+	LM3940IS	-3.3 P+	-3.3 P+
Width (mm)	3.5	3.5	3.5	3.5	8.41	8.41	8.41	8.41	10.16	10.16
Length (mm)	6.5	6.5	6.5	6.5	10.18	10.18	10.18	10.18	14.986	14.986
Thickness (mm)	1.6	1.6	1.6	1.6	4.44	4.44	4.44	4.44	4.572	4.572
Pitch (mm)	2.3	2.3	2.3	2.3	2.54	2.54	2.54	2.54	2.54	2.54
Max Height (mm)	1.8	1.8	1.8	1.8	4.83	4.83	4.83	4.83	4.7	4.7
Mechanical Data	Download	Download	Download	Download	Download	Download	Download	Download	Download	Download

Parametrics

Parameters / Models	LM3940IMP-3.3	LM3940IMP-3.3/NOPB	LM3940IMPX-3.3	LM3940IMPX-3.3/NOPB	LM3940IS-3.3	LM3940IS-3.3/NOPB	LM3940ISX-3.3	LM3940ISX-3.3/NOPB	LM3940IT-3.3	LM3940IT-3.3/NOPB
Accuracy, %	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Fixed Output Options, V	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3
Iout(Max), A	1	1	1	1	1	1	1	1	1	1
Iq(Typ), mA	0.11	0.11	0.11	0.11	0.11	0.11	0.11	0.11	0.11	0.11
Noise, uVrms	150	150	150	150	150	150	150	150	150	150
Operating Temperature Range, C	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Output Capacitor Type	Non-Ceramic	Non-Ceramic	Non-Ceramic	Non-Ceramic	Non-Ceramic	Non-Ceramic	Non-Ceramic	Non-Ceramic	Non-Ceramic	Non-Ceramic
Output Options	Fixed Output	Fixed Output	Fixed Output	Fixed Output	Fixed Output	Fixed Output	Fixed Output	Fixed Output	Fixed Output	Fixed Output
PSRR @ 100KHz, dB	32	32	32	32	32	32	32	32	32	32
Package Group	SOT-223	SOT-223	SOT-223	SOT-223	DDPAK/TO-263	DDPAK/TO-263	DDPAK/TO-263	DDPAK/TO-263	TO-220	TO-220
Package Size: mm2:W x L, PKG	4SOT-223: 46 mm2: 7 x 6.5(SOT-223)	4SOT-223: 46 mm2: 7 x 6.5(SOT-223)	4SOT-223: 46 mm2: 7 x 6.5(SOT-223)	4SOT-223: 46 mm2: 7 x 6.5(SOT-223)	3DDPAK/TO-263: 155 mm2: 15.24 x 10.16(DDPAK/TO-263)	3DDPAK/TO-263: 155 mm2: 15.24 x 10.16(DDPAK/TO-263)	3DDPAK/TO-263: 155 mm2: 15.24 x 10.16(DDPAK/TO-263)	3DDPAK/TO-263: 155 mm2: 15.24 x 10.16(DDPAK/TO-263)	See datasheet (TO-220)	See datasheet (TO-220)
Rating	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
Regulated Outputs	1	1	1	1	1	1	1	1	1	1
Special Features	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Thermal Resistance ОёJA, В°C/W	23	23	23	23	23	23	23	23	23	23
Vdo(Typ), mV	310	310	310	310	310	310	310	310	310	310
Vin(Max), V	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
Vin(Min), V	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5
Vout(Max), V	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3
Vout(Min), V	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3	3.3

Eco Plan

	LM3940IMP-3.3	LM3940IMP-3.3/NOPB	LM3940IMPX-3.3	LM3940IMPX-3.3/NOPB	LM3940IS-3.3	LM3940IS-3.3/NOPB	LM3940ISX-3.3	LM3940ISX-3.3/NOPB	LM3940IT-3.3	LM3940IT-3.3/NOPB
RoHS	See ti.com	Compliant	See ti.com	Compliant	See ti.com	Compliant	See ti.com	Compliant	See ti.com	Compliant
Pb Free	Yes	Yes

Application Notes

Download
AN-1061 Power Conversion in Line-Powered Equipment (Rev. B)
PDF, 406 Kb, Revision: B, File published: Apr 23, 2013
This application note describes line-powered equipment and power conversion techniques or methods tosolve those typical power needs.

Model Line

Series: LM3940 (10)

LM3940IMP-3.3 LM3940IMP-3.3/NOPB LM3940IMPX-3.3 LM3940IMPX-3.3/NOPB LM3940IS-3.3 LM3940IS-3.3/NOPB LM3940ISX-3.3 LM3940ISX-3.3/NOPB LM3940IT-3.3 LM3940IT-3.3/NOPB

Manufacturer's Classification

Semiconductors> Power Management> Linear Regulator (LDO)> Single Channel LDO