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L4949NG

P1-P3P4-P6P7-P9P10-P12
© Semiconductor Components Industries, LLC, 2008
November, 2008 − Rev. 12
1 Publication Order Number:
L4949/D
L4949, NCV4949
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
Reset and Sense
The L4949 is a monolithic integrated 5.0 V voltage regulator with a
very low dropout and additional functions such as reset and an
uncommitted voltage sense comparator.
It is designed for supplying microcontroller/microprocessor
controlled systems particularly in automotive applications.
Features
• 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 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
• Voltage Sense Comparator
• Thermal Shutdown and Short Circuit Protections
• NCV Prefix for Automotive and Other Applications Requiring Site
and Change Control
• These are Pb−Free Devices
Regulator
1.23 V
ref
2.0 V
2.0 mA
Reset
1.23 V
Sense
GND
Sense
Output
(S
o
)
Reset
Sense
Input
(S
i
)
Supply
Voltage (V
CC
)
V
Z
Output
Voltage (V
out
)
C
T
38 4
6
7
5
2
1
V
s
+
-
+
-
Preregulator
6.0 V
Figure 1. Representative Block Diagram
http://onsemi.com
(Top View)
PIN CONNECTIONS
1
2
3
4
8
7
6
5
V
Z
C
T
GND
S
i
V
CC
Reset
S
o
V
out
SOIC−8
D SUFFIX
CASE 751
PDIP−8
N SUFFIX
CASE 626
1
8
1
8
1
8
L4949N
AWL
YYWWG
L4949
ALYWD
G
1
8
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
ORDERING INFORMATION
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G or G = Pb−Free Device
MARKING DIAGRAMS
1
20
SOIC−20W
DW SUFFIX
CASE 751D
20
1
L4949DW
AWLYYWWG
1
8
SOIC−8 EP
PD SUFFIX
CASE 751AC
1
8
V4949
ALYWG
G
L4949, NCV4949
http://onsemi.com
2
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
DC Operating Supply Voltage V
CC
28 V
Transient Supply Voltage (t < 1.0 s) V
CC
TR
40 V
Output Current I
out
Internally
Limited
−
Output Voltage V
out
20 V
Sense Input Current I
SI
±1.0 mA
Sense Input Voltage V
SI
V
CC
−
Output Voltages V
Reset Output V
Reset
20
Sense Output V
SO
20
Output Currents mA
Reset Output I
Reset
5.0
Sense Output I
SO
5.0
Preregulator Output Voltage V
Z
7.0 V
Preregulator Output Current I
Z
5.0 mA
ESD Protection at any pin V
Human Body Model − 2000
Machine Model − 400
Thermal Resistance, Junction−to−Air
R
q
JA
°C/W
P Suffix, DIP−8 Plastic Package, Case 626 100
D Suffix, SOIC−8 Plastic Package, Case 751 200
PD Suffix, SOIC−8 EP Plastic Package, Case 751AC (Note 1) 85
D Suffix, SOIC−20 Plastic Package, Case 751D 80
Operating Junction Temperature Range T
J
−40 to +150 °C
Storage Temperature Range T
stg
−65 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Soldered to a 200 mm
2
1 oz. copper−clad FR−4 board.
ELECTRICAL CHARACTERISTICS (V
CC
= 14 V, −40°C < T
A
< 125°C, unless otherwise specified.)
Characteristic
Symbol Min Typ Max Unit
Output Voltage (T
A
= 25°C, I
out
= 1.0 mA) V
out
4.95 5.0 5.05 V
Output Voltage (6.0 V < V
CC
< 28 V, 1.0 mA < I
out
< 50 mA) V
out
4.9 5.0 5.1 V
Output Voltage (V
CC
= 35 V, t < 1.0 s, 1.0 mA < I
out
< 50 mA) V
out
4.9 5.0 5.1 V
Dropout Voltage V
drop
V
I
out
= 10 mA − 0.1 0.25
I
out
= 50 mA − 0.2 0.40
I
out
= 100 mA − 0.3 0.50
Input to Output Voltage Difference in Undervoltage Condition V
IO
− 0.2 0.4 V
(V
CC
= 4.0 V, I
out
= 35 mA)
Line Regulation (6.0 V < V
CC
< 28 V, I
out
= 1.0 mA) Reg
line
− 1.0 20 mV
Load Regulation (1.0 mA < I
out
< 100 mA) Reg
load
− 8.0 30 mV
Current Limit I
Lim
mA
V
out
= 4.5 V 105 200 400
V
out
= 0 V − 100 −
Quiescent Current (I
out
= 0.3 mA, T
A
< 100°C) I
QSE
− 150 260
mA
Quiescent Current (I
out
= 100 mA) I
Q
− − 5.0 mA
L4949, NCV4949
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS (continued) (V
CC
= 14 V, −40°C < T
A
< 125°C, unless otherwise specified.)
Characteristic UnitMaxTypMinSymbol
RESET
Reset Threshold Voltage
V
Resth
− V
out
− 0.5 − V
Reset Threshold Hysteresis V
Resth,hys
mV
@ T
A
= 25°C 50 100 200
@ T
A
= −40 to +125°C 50 − 300
Reset Pulse Delay (C
T
= 100 nF, t
R
≥ 100 ms)
t
ResD
55 100 180 ms
Reset Reaction Time (C
T
= 100 nF) t
ResR
− 5.0 30
ms
Reset Output Low Voltage (R
Reset
= 10 kW to V
out
, V
CC
≥ 3.0 V)
V
ResL
− − 0.4 V
Reset Output High Leakage Current (V
Reset
= 5.0 V) I
ResH
− − 1.0
mA
Delay Comparator Threshold V
CTth
− 2.0 − V
Delay Comparator Threshold Hysteresis V
CTth,
hys
− 100 − mV
SENSE
Sense Low Threshold (V
SI
Decreasing = 1.5 V to 1.0 V) V
SOth
1.16 1.23 1.35 V
Sense Threshold Hysteresis V
SOth,hys
20 100 200 mV
Sense Output Low Voltage (V
SI
≤ 1.16 V, V
CC
≥ 3.0 V, R
SO
= 10 kW to V
out
)
V
SOL
− − 0.4 V
Sense Output Leakage (V
SO
= 5.0 V, V
SI
≥ 1.5 V) I
SOH
− − 1.0
mA
Sense Input Current I
SI
−1.0 0.1 1.0
mA
PREREGULATOR
Preregulator Output Voltage (I
Z
= 10 mA)
V
Z
− 6.3 − V
PIN FUNCTION DESCRIPTION
Pin
SOIC−8, PDIP−8
Pin
SOIC−8 EP
Pin
SOIC−20W
Symbol Description
1 1 19 V
CC
Supply Voltage
2 2 20 S
i
Input of Sense Comparator
3 3 1 V
Z
Output of Preregulator
4 4 2 C
T
Reset Delay Capacitor
5 5 4 − 7, 14 − 17 GND Ground
6 6 10 Reset Output of Reset Comparator
7 7 11 S
O
Output of Sense Comparator
8 8 12 V
out
Main Regulator Output
− − 3, 8, 9, 13, 18 NC No Connect
− EPAD − EPAD Connect to Ground potential or leave unconnected
P1-P3P4-P6P7-P9P10-P12

L4949NG

Mfr. #:
Buy L4949NG
Manufacturer:
ON Semiconductor
Description:
IC REG LINEAR 5V 100MA 8DIP
Lifecycle:
New from this manufacturer.
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