View L494906_741382.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

L4949, NCV4949 100 mA, 5.0 V, Low Dropout Voltage Regulator with Power-On Reset
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.
Features http://onsemi.com MARKING DIAGRAMS
8 8 1 PDIP-8 N SUFFIX CASE 626 L4949N AWL YYWWG 1
* * * * * * * * * * * *
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 NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes Pb-Free Packages are Available
8 8 1 SOIC-8 D SUFFIX CASE 751 L4949 ALYWD G 1
20 20 1 SOIC-20W DW SUFFIX CASE 751D A WL, L YY, Y WW, W G or G L4949DW AWLYYWWG
Output Voltage (Vout) VZ 3 8 Supply Voltage (VCC) 1 Preregulator 6.0 V 2.0 mA
CT 4
1 = Assembly Location = Wafer Lot = Year = Work Week = Pb-Free Device
Reset 6 + - Reset 2.0 V Sense Output (So) 7 + - 1.23 Vref Sense 1.23 V
PIN CONNECTIONS
VCC Si VZ CT 1 2 3 4 8 7 6 5 Vout So Reset GND
Regulator Sense Input (Si) 2 Vs
5
GND
(Top View)
Figure 1. Representative Block Diagram ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet.
(c) Semiconductor Components Industries, LLC, 2006
1
June, 2006 - Rev. 9
Publication Order Number: L4949/D
L4949, NCV4949
ABSOLUTE MAXIMUM RATINGS
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, SOIC-8 Plastic Package, Case 751 D Suffix, SOIC-20 Plastic Package, Case 751D Operating Junction Temperature Range Storage Temperature Range Symbol VCC VCC TR Iout Vout ISI VSI VReset VSO IReset ISO VZ IZ - - RqJA 100 200 80 TJ Tstg -40 to +150 -65 to +150 C C Value 28 40 Internally Limited 20 1.0 VCC 20 20 mA 5.0 5.0 7.0 5.0 2000 400 C/W V mA V Unit V V - V mA - V
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.
ELECTRICAL CHARACTERISTICS (VCC = 14 V, -40C < TA < 125C, unless otherwise specified.)
Characteristic Output Voltage (TA = 25C, Iout = 1.0 mA) Output Voltage (6.0 V < VCC < 28 V, 1.0 mA < Iout < 50 mA) Output Voltage (VCC = 35 V, t < 1.0 s, 1.0 mA < Iout < 50 mA) Dropout Voltage Iout = 10 mA Iout = 50 mA Iout = 100 mA Input to Output Voltage Difference in Undervoltage Condition (VCC = 4.0 V, Iout = 35 mA) Line Regulation (6.0 V < VCC < 28 V, Iout = 1.0 mA) Load Regulation (1.0 mA < Iout < 100 mA) Current Limit Vout = 4.5 V Vout = 0 V Quiescent Current (Iout = 0.3 mA, TA < 100C) Quiescent Current (Iout = 100 mA) Symbol Vout Vout Vout Vdrop - - - VIO Regline Regload ILim 105 - IQSE IQ - - 200 100 150 - 400 - 260 5.0 mA mA - - - 0.1 0.2 0.3 0.2 1.0 8.0 0.25 0.40 0.50 0.4 20 30 V mV mV mA Min 4.95 4.9 4.9 Typ 5.0 5.0 5.0 Max 5.05 5.1 5.1 Unit V V V V
http://onsemi.com
2
L4949, NCV4949
ELECTRICAL CHARACTERISTICS (continued) (VCC = 14 V, -40C < TA < 125C, unless otherwise specified.)
Characteristic RESET Reset Threshold Voltage Reset Threshold Hysteresis @ TA = 25C @ TA = -40 to +125C Reset Pulse Delay (CT = 100 nF, tR 100 ms) Reset Reaction Time (CT = 100 nF) Reset Output Low Voltage (RReset = 10 kW to Vout, VCC 3.0 V) Reset Output High Leakage Current (VReset = 5.0 V) Delay Comparator Threshold Delay Comparator Threshold Hysteresis 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 kW to Vout) Sense Output Leakage (VSO = 5.0 V, VSI 1.5 V) Sense Input Current PREREGULATOR Preregulator Output Voltage (IZ = 10 mA) VZ - 6.3 - V VSOth VSOth,hys VSOL ISOH ISI 1.16 20 - - -1.0 1.23 100 - - 0.1 1.35 200 0.4 1.0 1.0 V mV V mA mA VResth VResth,hys 50 50 tResD tResR VResL IResH VCTth VCTth, hys 55 - - - - - 100 - 100 5.0 - - 2.0 100 200 300 180 30 0.4 1.0 - - ms ms V mA V mV - Vout - 0.5 - V mV Symbol Min Typ Max Unit
PIN FUNCTION DESCRIPTION
Pin SOIC-8, PDIP-8 1 2 3 4 5 6 7 8 - Pin SOIC-20W 19 20 1 2 4 - 7, 14 - 17 10 11 12 3, 8, 9, 13, 18 Symbol VCC Si VZ CT GND Reset SO Vout NC Supply Voltage Input of Sense Comparator Output of Preregulator Reset Delay Capacitor Ground Output of Reset Comparator Output of Sense Comparator Main Regulator Output No Connect Description
http://onsemi.com
3
L4949, NCV4949
TYPICAL CHARACTERIZATION CURVES
5.04 Vout , OUTPUT VOLTAGE (V) Vout , OUTPUT VOLTAGE (V) VCC = 14 V Iout = 1.0 mA 5.02 6.0 TJ = 25C 5.0 4.0 RL = 5.0 k 3.0 2.0 1.0 0 RL = 100 W
5.0
4.98
4.96 -40
-20
0
20
40
60
80
100
120
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10
TJ, JUNCTION TEMPERATURE (C)
VCC, SUPPLY VOLTAGE (V)
Figure 2. Output Voltage versus Junction Temperature
Figure 3. Output Voltage versus Supply Voltage
250 Vdrop , DROPOUT VOLTAGE (mV) Vdrop , DROPOUT VOLTAGE (mV) TJ = 25C 200 150 100
0.40 Iout = 100 mA
0.30
0.20
Iout = 50 mA Iout = 10 mA
0.10
50 0
0.1
1.0
10
100
0 -40
-20
0
20
40
60
80
100
120
Iout, OUTPUT CURRENT (mA)
TJ, JUNCTION TEMPERATURE (C)
Figure 4. Dropout Voltage versus Output Current
Figure 5. Dropout Voltage versus Junction Temperature
3.0 IQ, QUIESCENT CURRENT (mA) 2.5 2.0 1.5 1.0 0.5 0 VCC = 14 V TJ = 25C IQ, QUIESCENT CURRENT (mA)
3.0 2.5 2.0 1.5 1.0 0.5 0 RL = 5.0 k 0 5.0 10 15 20 25 30 RL = 100 W TJ = 25C
0.1
1.0
10
100
Iout, OUTPUT CURRENT (mA)
VCC, SUPPLY VOLTAGE (V)
Figure 6. Quiescent Current versus Output Current
Figure 7. Quiescent Current versus Supply Voltage
http://onsemi.com
4
L4949, NCV4949
TYPICAL CHARACTERIZATION CURVES (continued)
6.0 TJ = 25C VReset , RESET OUTPUT (V) 5.0 4.0 3.0 2.0 1.0 0 4.0 Resistor 10 k from Reset Output to 5.0 V VReset , RESET THRESHOLD VOLTAGE (V) 4.7 4.66 Upper Threshold 4.62 4.58 4.54 4.5 4.46 4.42 -40 -20 0 20 40 60 80 100 120 Lower Threshold
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
Vout, OUTPUT VOLTAGE (V)
TJ, JUNCTION TEMPERATURE (C)
Figure 8. Reset Output versus Regulator Output Voltage
Figure 9. Reset Thresholds versus Junction Temperature
6.0 VSO , SENSE OUTPUT VOLTAGE (V) 5.0 4.0 3.0 2.0 1.0 0 1.0 1.05 TJ = 25C Resistor 10 k from Sense Output to 5.0 V VSI , SENSE INPUT VOLTAGE (V)
1.4 1.38 1.36 1.34 1.32 1.3 1.28 1.26 1.24 1.22 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.2 -40 -20 0 20 40 60 80 100 120 Lower Threshold Upper Threshold
VSI, SENSE INPUT VOLTAGE (V)
TJ, JUNCTION TEMPERATURE (C)
Figure 10. Sense Output versus Sense Input Voltage
Figure 11. Sense Thresholds versus Junction Temperature
http://onsemi.com
5
L4949, NCV4949
APPLICATION INFORMATION
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 supply voltages
less than 8.0 V supply transients of more than 0.4 V/ms can cause a reset signal perturbation. To improve the transient behavior for supply voltages less than 8.0 V a capacitor at Pin 3 can be used. A capacitor at Pin 3 (C3 1.0 mF) reduces also the output noise.
C3 VZ (optional) Vbat Cs VCC 1
Vout
CO
3
8
CT 4
Preregulator 6.0 V
2.0 mA 6 10 kW + - Regulator VCC Si 2 + - 1.23 Vref Sense 1.23 V Reset RSO 10 kW 2.0 V
Reset
Vout
So 7
5 GND NOTE: 1. For stability: Cs 1.0 mF, CO 4.7 mF, ESR < 10 W at 10 kHz 2. Recommended for application: Cs = CO = 10 mF
Figure 12. Application Schematic
http://onsemi.com
6
L4949, NCV4949
OPERATING DESCRIPTION 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 in automotive applications. Nevertheless, it is suitable also in other applications where the present functions are required. The modular approach of this device allows the use of other features and functions independently when required.
Voltage Regulator
Vout
5.0 V
Vout
IQ, QUIESCENT CURRENT (mA)
The voltage regulator uses an isolated Collector Vertical PNP transistor as a regulating element. With this structure, very low dropout voltage at currents up to 100 mA is obtained. The dropout operation of the standby regulator is maintained down to 3.0 V input supply voltage. The output voltage is regulated up to the transient input supply voltage of 35 V. With this feature no functional interruption due to overvoltage pulses is generated. The typical curve showing the standby output voltage as a function of the input supply voltage is shown in Figure 14. The current consumption of the device (quiescent current) is less than 200 mA. To reduce the quiescent current peak in the undervoltage region and to improve the transient response in this region, the dropout voltage is controlled. The quiescent current as a function of the supply input voltage is shown in Figure 15.
Short Circuit Protection:
0V
2.0 V
5.0 V VCC
35 V
Figure 14. Output Voltage versus Supply Voltage
3.0 2.5 2.0 1.5 1.0 0.5 0 RL = 5.0 k 0 5.0 10 15 20 25 30 RL = 100 W TJ = 25C
The maximum output current is internally limited. In case of short circuit, the output current is foldback current limited as described in Figure 13.
10
VCC, SUPPLY VOLTAGE (V)
Figure 15. Quiescent Current versus Supply Voltage Preregulator
5.0
0 20 100 Iout (mA) 200
To improve the transient immunity a preregulator stabilizes the internal supply voltage to 6.0 V. This internal voltage is present at Pin 3 (VZ). This voltage should not be used as an output because the output capability is very small ( 100 mA). This output may be used as an option when better transient behavior for supply voltages less than 8.0 V is required. In this case a capacitor (100 nF - 1.0 mF) must be connected between Pin 3 and GND. If this feature is not used Pin 3 must be left open.
Vout (V)
Figure 13. Foldback Characteristic of Vout
http://onsemi.com
7
L4949, NCV4949
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 4.5 V is defined with the internal reference voltage and standby output divider. The reset pulse delay time tRD, is defined with the charge time of an external capacitor CT:
t RD + C x 2.0 V T 2.0 mA
Standby output voltage drops below the reset threshold only a bit longer than the reaction time results in a shorter reset delay time. The nominal reset delay time will be generated for standby output voltage drops longer than approximately 50 ms. The typical reset output waveforms are shown in Figure 17.
Vout 5.0 V VRT + 0.1 V UKT 3.0 V tR Reset tRD tRD tRR Output Overload Vin Vout1 40 V
The reaction time of the reset circuit originates from the discharge time limitation of the reset capacitor CT and is proportional to the value of CT. The reaction time of the reset circuit increases the noise immunity.
1.23 V Vref 22 k Out 2.0 mA Reset CT + - Reg 2.0 V
t
Switch On
Input Drop
Dump
Switch Off
Figure 17. Typical Reset Output Waveforms Sense Comparator
Figure 16. Reset Circuit
The sense comparator compares an input signal with an internal voltage reference of typical 1.23 V. The use of an external voltage divider makes this comparator very flexible in the application. It can be used to supervise the input voltage either before or after the protection diode and to give additional information to the microprocessor like low voltage warnings.
ORDERING INFORMATION
Device L4949N L4949NG L4949D L4949DG L4949DR2 L4949DR2G
Operating Temperature Range
Package PDIP-8 PDIP-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-8
Shipping 50 Units / Rail 50 Units / Rail 98 Units / Rail 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 98 Units / Rail 2500 Units / Tape & Reel 2500 Units / Tape & Reel 1000 Units / Tape & Reel 1000 Units / Tape & Reel
TJ = -40C to +125C NCV4949DG* NCV4949DR2* NCV4949DR2G* NCV4949DWR2* NCV4949DWR2G*
SOIC-8 (Pb-Free) SOIC-8 (Pb-Free) SOIC-8 SOIC-8 (Pb-Free) SOIC-20W SOIC-20W (Pb-Free)
For information on tape and reel specifications,including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NCV4949: Tlow = -40C, Thigh = +125C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control.
http://onsemi.com
8
L4949, NCV4949
PACKAGE DIMENSIONS
N SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE L
NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC --- 10 _ 0.76 1.01 INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC --- 10_ 0.030 0.040
8
5
-B-
1 4
F
NOTE 2
-A- L
C -T-
SEATING PLANE
J N D K
M
M TA B
H
G 0.13 (0.005)
M M
SOIC-20 WB DW SUFFIX CASE 751D-05 ISSUE G
D
A
11 X 45 _
q
NOTES: 1. DIMENSIONS ARE IN MILLIMETERS. 2. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A A1 B C D E e H h L q MILLIMETERS MIN MAX 2.35 2.65 0.10 0.25 0.35 0.49 0.23 0.32 12.65 12.95 7.40 7.60 1.27 BSC 10.05 10.55 0.25 0.75 0.50 0.90 0_ 7_
H
M
B
M
20
10X
0.25
E
1
10
20X
B 0.25
M
B TA
S
B
S
A
SEATING PLANE
h
18X
e
A1
T
C
http://onsemi.com
9
L
L4949, NCV4949
PACKAGE DIMENSIONS
SOIC-8 D SUFFIX CASE 751-07 ISSUE AH
-X- A
8 5
B
1 4
S
0.25 (0.010)
M
Y
M
-Y- G C -Z- H D 0.25 (0.010)
M SEATING PLANE
K
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. 751-01 THRU 751-06 ARE OBSOLETE. NEW STANDARD IS 751-07. MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0_ 8_ 0.010 0.020 0.228 0.244
N
X 45 _
0.10 (0.004)
M
J
ZY
S
X
S
DIM A B C D G H J K M N S
SOLDERING FOOTPRINT*
1.52 0.060
7.0 0.275
4.0 0.155
0.6 0.024
1.270 0.050
SCALE 6:1 mm inches
*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. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
http://onsemi.com
10
L4949/D

▲Up To Search▲

Price & Availability of L494906

	To Download L494906 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .