l4949dw ON Semiconductor, l4949dw Datasheet

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l4949dw

Manufacturer Part Number
l4949dw
Description
5v / 100ma Ldo W/ Reset, Delay Reset And Early Warning
Manufacturer
ON Semiconductor
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
L4949DW
Manufacturer:
ON/安森美
Quantity:
20 000
L4949, NCV4949
100 mA, 5.0 V, Low Dropout
Voltage Regulator with
Reset and Sense
very low dropout and additional functions such as reset and an
uncommitted voltage sense comparator.
controlled systems particularly in automotive applications.
Features
Voltage (V
© Semiconductor Components Industries, LLC, 2007
June, 2007 - Rev. 10
The L4949 is a monolithic integrated 5.0 V voltage regulator with a
It is designed for supplying microcontroller/microprocessor
and Change Control
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
Pb-Free Packages are Available
Supply
Sense
Input
(S
CC
1
2
i
)
)
V
s
Figure 1. Representative Block Diagram
Regulator
Preregulator
1.23 V
6.0 V
ref
V
Z
3
Voltage (V
5
Output
Reset
GND
8
2.0 mA
out
)
Sense
C
T
4
+
-
+
-
1.23 V
2.0 V
1
Sense
Output
(S
Reset
7
6
o
)
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
20
8
DW SUFFIX
CASE 751D
8
SOIC-20W
8
1
V
C
V
CC
1
S
1
1
Z
T
ORDERING INFORMATION
i
1
2
3
4
A
WL, L
YY, Y
WW, W = Work Week
G or G
PIN CONNECTIONS
http://onsemi.com
CASE 751AC
CASE 626
N SUFFIX
CASE 751
PD SUFFIX
D SUFFIX
SOIC-8 EP
PDIP-8
SOIC-8
(Top View)
20
= Assembly Location
= Wafer Lot
= Year
= Pb-Free Device
1
MARKING DIAGRAMS
Publication Order Number:
AWLYYWWG
L4949DW
8
1
8
1
8
1
8
7
6
5
L4949N
ALYWD
ALYWG
YYWWG
V4949
L4949
V
S
Reset
GND
G
G
out
o
AWL
L4949/D

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l4949dw Summary of contents

Page 1

... SOIC-8 L4949 8 D SUFFIX ALYWD CASE 751 SOIC-8 EP V4949 8 PD SUFFIX ALYWG CASE 751AC L4949DW AWLYYWWG 1 SOIC-20W DW SUFFIX CASE 751D Assembly Location WL Wafer Lot YY Year WW Work Week Pb-Free Device PIN CONNECTIONS ...

Page 2

ABSOLUTE MAXIMUM RATINGS 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 ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) (V Characteristic RESET Reset Threshold Voltage Reset Threshold Hysteresis @ T = 25° -40 to +125°C A ≥ 100 ms) Reset Pulse Delay (C = 100 nF Reset Reaction Time ...

Page 4

TYPICAL CHARACTERIZATION CURVES 5. 1.0 mA out 5.02 5.0 4.98 4.96 -40 - JUNCTION TEMPERATURE (°C) J Figure 2. Output Voltage versus Junction Temperature 250 T = ...

Page 5

TYPICAL CHARACTERIZATION CURVES 6 25°C J 5.0 Resistor 10 k from Reset Output 4.0 to 5.0 V 3.0 2.0 1.0 0 4.0 4.1 4.2 4.3 4.4 4.5 4 OUTPUT VOLTAGE (V) out Figure 8. Reset Output ...

Page 6

Supply Voltage Transient High supply voltage transients can cause a reset output signal perturbation. For supply voltages greater than 8.0 V the circuit shows a high immunity of the reset output against supply transients of more than 100 V/ms. For ...

Page 7

The L4949 is a monolithic integrated low dropout voltage regulator. Several outstanding features and auxiliary functions are implemented to meet the requirements of supplying microprocessor systems applications also suitable in other applications where the included functions are required. ...

Page 8

Reset Circuit The block circuit diagram of the reset circuit is shown in Figure 16. The reset circuit supervises the output voltage. The reset threshold of 4 defined by the internal reference voltage and standby output divider. The ...

Page 9

Device Operating Temperature Range L4949N L4949NG L4949D L4949DG L4949DR2 L4949DR2G NCV4949DG* T NCV4949PDG* NCV4949DR2* NCV4949DR2G* NCV4949PDR2G* NCV4949DWR2* NCV4949DWR2G* †For information on tape and reel specifications,including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, ...

Page 10

F -A- NOTE 2 C -T- N SEATING PLANE 0.13 (0.005 20X 0. 18X A1 L4949, NCV4949 ...

Page 11

... TOP VIEW A 0. 0.10 C SEATING PLANE A1 SIDE VIEW C *For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. L4949, NCV4949 PACKAGE DIMENSIONS SOIC SUFFIX CASE 751AC-01 ISSUE B C A-B F EXPOSED PAD 5 ...

Page 12

... *For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...

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