MOTOROLA L4949N, L4949DR2, L4949D Datasheet

Order this document from L4949/D

Multifunction Very Low

Dropout Voltage Regulator

The L4949 is a monolithic integrated 5.0 V voltage regulator with a very low dropout and additional functions such as power±on reset and input voltage sense.

It is designed for supplying the micro±computer controlled systems especially in automotive applications.

•Operating DC Supply Voltage Range 5.0 V to 28 V

•Transient Supply Voltage Up to 40 V

•Extremely Low Quiescent Current in Standby Mode

•High Precision Standby Output Voltage 5.0 V ±1%

•Output Current Capability Up to 100 mA

•Very Low Dropout Voltage Less Than 0.4 V

•Reset Circuit Sensing The Output Voltage

•Programmable Reset Pulse Delay With External Capacitor

•Voltage Sense Comparator

•Thermal Shutdown and Short Circuit Protections

	Representative Block Diagram
			Output
	VZ	Voltage (Vout)		CT
		3	8		4
Supply
Voltage (VCC)	Preregulator
1	6.0 V
			2.0 μA		Reset
					6
					+
	Regulator				2.0 V
					±
	Vs		Reset		Sense
Sense					Output
Input					(So)
(Si)					7
2
					+
					1.23 V
	1.23 Vref				±
				Sense
		5	Gnd

L4949

MULTIFUNCTION

VERY LOW DROPOUT

VOLTAGE REGULATOR

SILICON MONOLITHIC

INTEGRATED CIRCUIT

8

1

N SUFFIX

PLASTIC PACKAGE

CASE 626

8

1

D SUFFIX

PLASTIC PACKAGE

CASE 751

PIN CONNECTIONS

VCC							Vout
	1					8
Si							So
	2					7
VZ							Reset
	3					6
CT							Gnd
	4					5
			(Top View)

	ORDERING INFORMATION
		Operating
Device		Temperature Range	Package
L4949N		TJ = ±40° to +125°C	DIP±8
L4949D			SO±8

Motorola, Inc. 1998

Rev 1

L4949

ABSOLUTE MAXIMUM RATINGS (Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.)

Rating	Symbol	Value	Unit
DC Operating Supply Voltage	VCC	28	V
Transient Supply Voltage (t < 1.0 s)	VCC TR	40	V
Output Current	Iout	Internally	±
		Limited
Output Voltage	Vout	20	V
Sense Input Current	ISI	±1.0	mA
Sense Input Voltage	VSI	VCC	±
Output Voltages			V
Reset Output	VReset	20
Sense Output	VSO	20
Output Currents			mA
Reset Output	IReset	5.0
Sense Output	ISO	5.0
Preregulator Output Voltage	VZ	7.0	V
Preregulator Output Current	IZ	5.0	mA
ESD Protection at any pin			V
Human Body Model	±	2000
Machine Model	±	400
Thermal Resistance, Junction±to±Air	RθJA		°C/W
P Suffix, DIP±8 Plastic Package, Case 626		100
D Suffix, SO±8 Plastic Package, Case 751		200
Maximim Junction Temperature	TJ	150	°C
Storage Temperature Range	Tstg	±65 to +150	°C

NOTE: ESD data available upon request.

ELECTRICAL CHARACTERISTICS (VCC = 14 V, ±40°C < TJ < 125°C, unless otherwise specified.)

Characteristic	Symbol	Min	Typ	Max	Unit
Output Voltage (TJ = 25°C, Iout = 1.0 mA)	Vout	4.95	5.0	5.05	V
Output Voltage (6.0 V < VCC < 28 V, 1.0 mA < Iout < 50 mA)	Vout	4.9	5.0	5.1	V
Output Voltage (VCC = 35 V, t < 1.0 s, 1.0 mA < Iout < 50 mA)	Vout	4.9	5.0	5.1	V
Dropout Voltage	Vdrop				V
Iout = 10 mA		±	0.1	0.25
Iout = 50 mA		±	0.2	0.40
Iout = 100 mA		±	0.3	0.50
Input to Output Voltage Difference in Undervoltage Condition	VIO	±	0.2	0.4	V
(VCC = 4.0 V, Iout = 35 mA)
Line Regulation (6.0 V < VCC < 28 V, Iout = 1.0 mA)	Regline	±	1.0	20	mV
Load Regulation (1.0 mA < Iout < 100 mA)	Regload	±	8.0	30	mV
Current Limit	ILim				mA
Vout = 4.5 V		105	200	400
Vout = 0 V		±	100	±
Quiescent Current (Iout = 0.3 mA, TJ < 100°C)	IQSE	±	150	260	μA
Quiescent Current (Iout = 100 mA)	IQ	±	±	5.0	mA

2	MOTOROLA ANALOG IC DEVICE DATA

L4949

ELECTRICAL CHARACTERISTICS (continued) (VCC = 14 V, ±40°C < TJ < 125°C, unless otherwise specified.)

Characteristic	Symbol	Min	Typ	Max	Unit
RESET
Reset Threshold Voltage	VResth	±	Vout ± 0.5	±	V
Reset Threshold Hysteresis	VResth,hys				mV
@ TJ = 25°C		50	100	200
@ TJ = ±40 to +125°C		50	±	300
Reset Pulse Delay (CT = 100 nF, tR ≥ 100 μs)	tResD	55	100	180	ms
Reset Reaction Time (CT = 100 nF)	tResR	±	5.0	30	μs
Reset Output Low Voltage (RReset = 10 kΩ to Vout, VCC ≥ 3.0 V)	VResL	±	±	0.4	V
Reset Output High Leakage Current (VReset = 5.0 V)	IResH	±	±	1.0	μA
Delay Comparator Threshold	VCTth	±	2.0	±	V
Delay Comparator Threshold Hysteresis	VCTth, hys	±	100	±	mV
SENSE
Sense Low Threshold (VSI Decreasing = 1.5 V to 1.0 V)	VSOth	1.16	1.23	1.35	V
Sense Threshold Hysteresis	VSOth,hys	20	100	200	mV
Sense Output Low Voltage	VSOL	±	±	0.4	V
(VSI ≤ 1.16 V, VCC ≥ 3.0 V, RSO = 10 kΩ to Vout)
Sense Output Leakage (VSO = 5.0 V, VSI ≥ 1.5 V)	ISOH	±	±	1.0	μA
Sense Input Current	ISI	±1.0	0.1	1.0	μA
PREREGULATOR
Preregulator Output Voltage (IZ = 10 μA)	VZ	±	6.3	±	V

		PIN FUNCTION DESCRIPTION
Pin	Symbol	Description
1	VCC	Supply Voltage
2	Si	Input of Sense Comparator
3	VZ	Output of Preregulator
4	CT	Reset Delay Capacitor
5	Gnd	Ground
6	Reset	Output of Reset Comparator
7	SO	Output of Sense Comparator
8	Vout	Main Regulator Output

TYPICAL CHARACTERIZATION CURVES

Figure 1. Output Voltage versus	Figure 2. Output Voltage versus
Junction Temperature	Supply Voltage

	5.04									6.0
		VCC = 14 V								5.0
(V)		Iout = 1.0 mA							(V)
	5.02
VOLTAGE									VOLTAGE
										4.0
	5.0									3.0
OUTPUT									OUTPUT
										2.0
,	4.98								,
out									out
V									V	1.0
	4.96	±20	0	20	40	60	80	100	120	0
	±40
			TJ, JUNCTION TEMPERATURE (°C)

	TJ = 25°C
		RL = 5.0 k
				RL = 100 Ω
0	1.0	2.0	3.0	4.0	5.0	6.0	7.0	8.0	9.0	10
			VCC, SUPPLY VOLTAGE (V)

MOTOROLA ANALOG IC DEVICE DATA	3