SGS Thomson Microelectronics LM2931D, LM2931AV50, LM2931AV33, LM2931BZ50, LM2931BZ33 Datasheet

	LM2931
	SERIES
	VERY LOW DROP VOLTAGE
	REGULATOR WITH INHIBIT FUNCTION

■VERY LOW DROPOUT VOLTAGE (0.15V TYP. AT 10mA LOAD)

■LOW QUIESCENT CURRENT (TYP 2.5mA, AT 100mA LOAD)

■OUTPUT CURRENT UP TO 100mA

■ADJUSTABLE (FROM VOUT=2.5V ONLY SO-8) AND FIXED (3.3V & 5V) OUTPUT VOLTAGE VERSION

■INTERNAL CURRENT AND THERMAL LIMIT

■LOAD DUMP PROTECTION UP TO 60V

■REVERSE TRANSIENT PROTECTION UP TO -50V

■TEMPERATURE RANGE: -40 TO 125 oC

■PACKAGE AVAILABLE: TO-92, DPAK, TO-220, SO-8 (WITH INHIBIT CONTROL)

DESCRIPTION

The LM2931 series are very low drop regulators. The very low drop voltage and the low quiescent current make them particular suitable for low noise, low power applications and in battery powered systems. In the 8 pin configation (SO-8), fully compatible to the older L78L00 family, a shut down Logic Control function is available.

This means that when the device is used as a

SO-8

TO-92

TO-252 (DPAK)

TO-220

local regulator is possible to put a part of the board in stand-by decreasing the total power consumption. Ideal for automotive application the LM2931 is proteceted from reverse battery installations or 2 battery jumps. During the transient, suchs as a a load dump (60V) when the input voltage can exceed the specified maximum operating input voltage (26V), the regulator will automatically shut down to protect both internal circuit and the load.

BLOCK DIAGRAM

December 1999

1/16

LM2931 SERIES

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value		Unit
VIN	DC Positive Input Voltage		40	V
VIN	DC Reverse Input Voltage		-15	V
VIN	Transient Input Voltage (τ < 100ms)		60	V
VIN	Transient Reverse Input Voltage (τ < 100ms)		-50	V
VI NH	Inhibit Input Voltage		40	V
IOUT	Output Current	Internally Limited		mA
Tstg	Storage Temperature Range	-65	to 150	o C
To p	Operating Junction Temperature Range	-40	to 125	o C

Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is not implied.

CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)

TO-220

DPAK

BOTTOM VIEW

			pin 1	= OUT
			pin 2	= GND
(*) = N.C. for FIXED and ADJ for ADJUSTABLE			pin 3	= IN
	SO-8			TO-92
TO-220	DPAK (*)	TO-92 (*)		SO-8 (*)	Output Voltage
LM2931AV33	LM2931ADT33	LM2931AZ33	LM2931AD33		3.3V
LM2931BV33	LM2931BDT33	LM2931BZ33	LM2931BD33		3.3V
LM2931AV50	LM2931ADT50	LM2931AZ50	LM2931AD50		5V
LM2931BV50	LM2931BDT50	LM2931BZ50	LM2931BD50		5V
			LM2931D		2.5V to 26V

(*) Available in Tape & Reel with the suffix ºRº for fixed version and º-Rº for adjustable version.

2/16

LM2931 SERIES

APPLICATION CIRCUIT FOR FIXED OUTPUT (Figure 1)

APPLICATION CIRCUIT FOR ADJUSTABLE OUTPUT (Figure 2)

R1 suggested Value = 27KΩ

VO = VREF x

R1 + R2

R1

3/16

LM2931 SERIES

ELECTRICAL CHARACTERISTICS FOR LM2931A 3.3V (refer to the test circuits,

Tj = 25 oC, VIN = 14 V, CIN = 0.1 μF, CO = 100 μF, IO = 10mA, VINH = 0V unless otherwise specified)

Symbol	Parameter	Test Conditions		Min.	Typ.	Max.	Unit
VI	Maximum Operating Input	IO = 10 mA	Tj = -40 to 125 oC	26	37		V
	Voltage
VO	Output Voltage			3.175	3.3	3.425	V
VO	Output Voltage	IO = 100 mA	VIN = 6 to 26 V	3.135	3.3	3.465	V
		Tj = -40 to 125 oC
VO	Line Regulation	VIN = 9 to 16 V			2	10	mV
VO	Line Regulation	VIN = 6 to 26 V			4	33	mV
VO	Load Regulation	IO = 5 to 100 mA			10	33	mV
Vd	Dropout Voltage (Note 1, 2)	IO = 10 mA			90	250	V
Vd	Dropout Voltage (Note 1, 2)	IO = 100 mA			250	600	V
Id	Quiescent Current	ON Mode: IOUT = 100mA			2.5	30	mA
Id	Quiescent Current	OFF Mode: VINH = 2.5 V RLOAD = 330Ω			0.3	1	mA
ISC	Short Circuit Current			100	300		mA
SVR	Supply Voltage Rejection	IO = 100 mA	VIN = 14 ± 2V	55	78		dB
		f = 120 Hz	Tj = -40 to 125 oC
VI L	Control Input Voltage	Tj = -40 to 125 oC			2	1.2	V
VIH	Control Input Voltage	Tj = -40 to 125 oC		3.25	2		V
IINH	Inhibit Input Current	VINH = 2.5 V			22	50	μA
VIN	Transient Input Voltage	RLOAD = 330Ω	τ < 100ms	60	70		V
VIN	Reverse Polarity Input	VO ± 0.3V	RLOAD = 330Ω	-15	-50		V
	Voltage
VIN	Reverse Polarity Input	RLOAD = 330Ω	τ < 100ms	-50			V
	Voltage Transient
eN	Output Noise Voltage	B = 10Hz to 100KHz			330		μVRMS

Note 1: Reference Voltage is measured from VOUT to AJD pin.

Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.

4/16

LM2931 SERIES

ELECTRICAL CHARACTERISTICS FOR LM2931B 3.3V (refer to the test circuits,

Tj = 25 oC, VIN = 14 V, CIN = 0.1 μF, CO = 100 μF, IO = 10mA, VINH = 0V unless otherwise specified)

Symbol	Parameter	Test Conditions		Min.	Typ.	Max.	Unit
VI	Maximum Operating Input	IO = 10 mA	Tj = -40 to 125 oC	26	37		V
	Voltage
VO	Output Voltage			3.135	3.3	3.465	V
VO	Output Voltage	IO = 100 mA	VIN = 6 to 26 V	2.97	3.3	3.63	V
		Tj = -40 to 125 oC
VO	Line Regulation	VIN = 9 to 16 V			2	10	mV
VO	Line Regulation	VIN = 6 to 26 V			4	33	mV
VO	Load Regulation	IO = 5 to 100 mA			10	33	mV
Vd	Dropout Voltage (Note 1, 2)	IO = 10 mA			90	200	V
Vd	Dropout Voltage (Note 1, 2)	IO = 100 mA			250	600	V
Id	Quiescent Current	ON Mode: IOUT = 100mA			2.5	30	mA
Id	Quiescent Current	OFF Mode: VINH = 2.5 V RLOAD = 330Ω			0.3	1	mA
ISC	Short Circuit Current			100	300		mA
SVR	Supply Voltage Rejection	IO = 100 mA	VIN = 14 ± 2V	55	78		dB
		f = 120 Hz	Tj = -40 to 125 oC
VI L	Control Input Voltage	Tj = -40 to 125 oC			2	1.2	V
VIH	Control Input Voltage	Tj = -40 to 125 oC		3.25	2		V
IINH	Inhibit Input Current	VINH = 2.5 V			22	50	μA
VIN	Transient Input Voltage	RLOAD = 330Ω	τ < 100ms	60	70		V
VIN	Reverse Polarity Input	VO ± 0.3V	RLOAD = 330Ω	-15	-50		V
	Voltage
VIN	Reverse Polarity Input	RLOAD = 330Ω	τ < 100ms	-50			V
	Voltage Transient
eN	Output Noise Voltage	B = 10Hz to 100KHz			330		μVRMS

Note 1: Reference Voltage is measured from VOUT to AJD pin.

Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.

5/16