MOTOROLA L4949N, L4949DR2, L4949D Datasheet
Order this document from L4949/D
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
MULTIFUNCTION
VERY LOW DROPOUT
VOLTAGE REGULATOR
SILICON MONOLITHIC
INTEGRATED CIRCUIT
8
1
N SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
Supply
Voltage (VCC)
Sense
Input
(Si)
1
V
s
2
Representative Block Diagram
Output
Preregulator
6.0 V
Regulator
1.23 V
Voltage (V
V
38 4
Z
ref
out
2.0
Reset
Gnd
5
)
µ
A
C
T
Sense
+
2.0 V
–
+
1.23 V
–
Reset
6
Sense
Output
(So)
7
D SUFFIX
PLASTIC PACKAGE
CASE 751
PIN CONNECTIONS
V
1
CC
S
2
i
V
3
Z
C
4
T
(Top View)
8
7
6
5
V
out
S
o
Reset
Gnd
ORDERING INFORMATION
Operating
Device
L4949N
L4949D
Motorola, Inc. 1998 Rev 1
Temperature Range
TJ = –40° to +125°C
Package
DIP–8
SO–8
ABSOLUTE MAXIMUM RATINGS
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
which damage to the device may occur.)
Rating
DC Operating Supply Voltage
Transient Supply Voltage (t < 1.0 s)
Output Current
Output Voltage
Sense Input Current
Sense Input Voltage
Output Voltages
Reset Output
Sense Output
Output Currents
Reset Output
Sense Output
Preregulator Output Voltage
Preregulator Output Current
ESD Protection at any pin
Human Body Model
Machine Model
Thermal Resistance, Junction–to–Air
P Suffix, DIP–8 Plastic Package, Case 626
D Suffix, SO–8 Plastic Package, Case 751
Maximim Junction Temperature
Storage Temperature Range
NOTE: ESD data available upon request.
L4949
(Absolute Maximum Ratings indicate limits beyond
Symbol Value Unit
V
VCC
I
out
V
I
V
V
Reset
V
I
Reset
I
SO
V
R
θJA
T
T
CC
out
SI
SI
SO
Z
I
Z
–
–
J
stg
TR
28
40
Internally
Limited
20
±1.0
V
CC
20
20
5.0
5.0
7.0
5.0
2000
400
100
200
150
–65 to +150
mA
mA
mA
°C/W
V
V
–
V
–
V
V
V
°C
°C
ELECTRICAL CHARACTERISTICS (V
= 14 V, –40°C < TJ < 125°C, unless otherwise specified.)
CC
Characteristic
Output Voltage (TJ = 25°C, I
Output Voltage (6.0 V < VCC < 28 V, 1.0 mA < I
Output Voltage (VCC = 35 V, t < 1.0 s, 1.0 mA < I
= 1.0 mA)
out
< 50 mA)
out
out
< 50 mA)
Dropout Voltage
I
= 10 mA
out
I
= 50 mA
out
I
= 100 mA
out
Input to Output Voltage Difference in Undervoltage Condition
(VCC = 4.0 V, I
Line Regulation (6.0 V < VCC < 28 V, I
Load Regulation (1.0 mA < I
= 35 mA)
out
< 100 mA)
out
= 1.0 mA)
out
Current Limit
V
= 4.5 V
out
V
= 0 V
out
Quiescent Current (I
БББББББББББББББББ
Quiescent Current (I
БББББББББББББББББ
= 0.3 mA, TJ < 100°C)
out
= 100 mA)
out
Symbol Min Typ Max Unit
V
out
V
out
V
out
V
drop
V
IO
Reg
line
Reg
load
I
Lim
I
QSE
ÁÁÁ
I
Q
ÁÁÁ
4.95
4.9
4.9
–
–
–
–
–
–
105
–
ÁÁ–ÁÁ
ÁÁ–ÁÁ–ÁÁ
5.0
5.0
5.0
0.1
0.2
0.3
0.2
1.0
8.0
200
100
150
5.05
5.1
5.1
0.25
0.40
0.50
0.4
20
30
400
–
260
ÁÁ
5.0
ÁÁ
ÁÁ
V
V
V
V
V
mV
mV
mA
µA
mA
2
MOTOROLA ANALOG IC DEVICE DATA
L4949
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ELECTRICAL CHARACTERISTICS (continued) (V
= 14 V, –40°C < TJ < 125°C, unless otherwise specified.)
CC
Characteristic UnitMaxTypMinSymbol
RESET
Reset Threshold Voltage
Reset Threshold Hysteresis
@ TJ = 25°C
@ TJ = –40 to +125°C
Reset Pulse Delay (CT = 100 nF, tR ≥ 100 µs)
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Reset Reaction Time (CT = 100 nF)
БББББББББББББББББ
Reset Output Low Voltage (R
БББББББББББББББББ
Reset Output High Leakage Current (V
БББББББББББББББББ
Delay Comparator Threshold
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Delay Comparator Threshold Hysteresis
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Reset
= 10 kΩ to V
= 5.0 V)
Reset
, VCC ≥ 3.0 V)
out
SENSE
Sense Low Threshold (VSI Decreasing = 1.5 V to 1.0 V)
Sense Threshold Hysteresis
Sense Output Low Voltage
(VSI ≤ 1.16 V , VCC ≥ 3.0 V, RSO = 10 kΩ to V
out
)
Sense Output Leakage (VSO = 5.0 V, VSI ≥ 1.5 V)
Sense Input Current
PREREGULAT OR
Preregulator Output Voltage (IZ = 10 µA)
V
Resth
V
Resth,hys
t
ResD
ÁÁÁ
t
ResR
ÁÁÁ
V
ResL
ÁÁÁ
I
ResH
ÁÁÁ
V
CTth
ÁÁÁ
V
CTth, hys
ÁÁÁ
V
SOth
V
SOth,hys
V
SOL
I
SOH
I
SI
V
Z
–
V
– 0.5
out
50
50
ÁÁ55ÁÁ
ÁÁ–ÁÁ
ÁÁ–ÁÁ–ÁÁ
ÁÁ–ÁÁ–ÁÁ
ÁÁ–ÁÁ
ÁÁ–ÁÁ
1.16
20
–
–
–1.0
–
100
–
100
5.0
2.0
100
1.23
100
–
–
0.1
6.3
–
200
300
180
ÁÁ
30
ÁÁ
0.4
1.0
–
ÁÁ
–
ÁÁ
1.35
200
0.4
1.0
1.0
–
V
mV
ms
ÁÁ
µs
ÁÁ
V
ÁÁ
µA
ÁÁ
V
ÁÁ
mV
ÁÁ
V
mV
V
µA
µA
V
Pin
ÁÁ
1
2
3
4
5
6
7
8
5.04
5.02
5.0
, OUTPUT VOL TAGE (V)
4.98
out
V
Symbol
ÁÁÁÁ
V
CC
S
i
V
Z
C
T
Gnd
Reset
S
O
V
out
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Supply Voltage
Input of Sense Comparator
Output of Preregulator
Reset Delay Capacitor
Ground
Output of Reset Comparator
Output of Sense Comparator
Main Regulator Output
TYPICAL CHARACTERIZA TION CUR VES
Figure 1. Output Voltage versus
Junction T emperature
VCC = 14 V
I
= 1.0 mA
out
PIN FUNCTION DESCRIPTION
Description
6.0
5.0
4.0
3.0
2.0
, OUTPUT VOL TAGE (V)
out
V
1.0
Figure 2. Output Voltage versus
Supply V oltage
TJ = 25°C
RL = 5.0 k
RL = 100
Ω
4.96
–40 –20 0 40 6020 100 120
TJ, JUNCTION TEMPERATURE (
80
°
C)
MOTOROLA ANALOG IC DEVICE DATA
0
010
1.0
2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
V
, SUPPLY VOLT AGE (V)
CC
3
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