LP5990TMX-1.2 [TI]
IC,VOLT REGULATOR,FIXED,+1.2V,CMOS,BGA,4PIN,PLASTIC;
| 型号： | LP5990TMX-1.2 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | IC,VOLT REGULATOR,FIXED,+1.2V,CMOS,BGA,4PIN,PLASTIC |
| 文件： | 总13页 (文件大小：328K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
National Semiconductor is now part of
Texas Instruments.
Search http://www.ti.com/ for the latest technical
information and details on our current products and services.
December 18, 2007
LP5990
Micropower 200mA CMOS Low Dropout Voltage Regulator
General Description
Features
The LP5990 regulator is designed to meet the requirements
of portable, battery-powered systems providing an accurate
output voltage, low noise and low quiescent current.
Operation from 2.2V to 5.5V input
■
■
■
±1% accuracy over temp range
Output voltage from 0.8V to 3.6V in 50mV increments
The LP5990 will provide a 1.8V output from a low input voltage
of 2.2V and can provide 200mA to an external load.
30 μA Quiescent current (enabled)
10nA Quiescent current (disabled)
160mV dropout at 200mA load
■
■
■
■
■
■
■
■
■
■
When switched into shutdown mode via a logic signal at the
enable pin, the power consumption is reduced to virtually
60 μVRMSOutput voltage noise
60 μs start-up time
500μs shut-down time
zero.
Fast shut-down is achieved by the push pull architecture.
The LP5990 is designed to be stable with space saving 0402
ceramic capacitors as small as 1µF, this gives an
overall solution size of < 2.5mm 2.
PSRR 55 dB at 10 kHz
Stable with 0402 1.0µF ceramic capacitors
Logic controlled enable
Performance is specified for a -40°C to 125°C junction tem-
perature range.
Thermal–overload and short–circuit protection
The device is available in micro SMD Package (0.4mm pitch)
and is available with 1.2V,1.3V,1.8V,2.8V,3.0V,3.3V and 3.6V
outputs.Lower voltage options down to 0.8V are available on
request. For all other output voltage options please contact
your local NSC sales office.
Package
4-Bump micro SMD,0.4mm
pitch
866 µm x 917 µm
(lead free)
Applications
Cellular phones
■
■
Hand–held information appliances
Typical Application Circuit
20184801
© 2007 National Semiconductor Corporation
201848
www.national.com
Connection Diagrams
4-Bump Thin micro SMD Package, 0.4mm pitch
NS Package Number TMD04
20184802
The actual physical placement of the package marking will vary from part to part.
Pin Descriptions
Pin No.
micro SMD
A2
Symbol
Name and Function
VEN
Enable input; disables the regulator when ≤ 0.35V. Enables the
regulator when ≥ 1.0V.
A1
B1
GND
VOUT
Common ground.
Output voltage. A 1.0 μF Low ESR capacitor should be connected to
this Pin. Connect this output to the load circuit.
B2
VIN
Input voltage supply. A 1.0 µF capacitor should be connected at this
input.
Ordering Information
micro SMD Package (Lead Free)
Output Voltage
(V)
Supplied As
250 Units Tape and Reel
3k Units Tape and Reel
LP5990TMX-1.2/NOPB
LP5990TMX-1.3/NOPB
LP5990TMX-1.8/NOPB
LP5990TMX-2.8/NOPB
LP5990TMX-3.0/NOPB
LP5990TMX-3.3/NOPB
LP5990TMX-3.6/NOPB
1.2
1.3
1.8
2.8
3.0
3.3
3.6
LP5990TM-1.2/NOPB
LP5990TM-1.3/NOPB
LP5990TM-1.8/NOPB
LP5990TM-2.8/NOPB
LP5990TM-3.0/NOPB
LP5990TM-3.3/NOPB
LP5990TM-3.6/NOPB
www.national.com
2
Human Body Model
Machine Model
2 kV
200V
Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Operating Ratings (Note 1), (Note 2)
VIN: Input Voltage Range
2.2V to 5.5V
0 to 5.5V (max)
0 to 200 mA
VIN Pin: Input Voltage
-0.3 to 6.0V
-0.3 to (VIN + 0.3V) to 6.0V
(max)
VEN: Enable Voltage Range
VOUT Pin: Output Voltage
Recommended Load Current
(Note 5)
Junction Temperature Range (TJ)
VEN Pin: Enable Input Voltage
-0.3 to 6.0V (max)
-40°C to +125°C
-40°C to +85°C
Continuous Power Dissipation
(Note 3)
Internally Limited
150°C
Ambient Temperature Range (TA)
(Note 5)
Junction Temperature (TJMAX
)
Storage Temperature Range
Maximum Lead Temperature
(Soldering, 10 sec.)
-65 to 150°C
Thermal Properties
Junction to Ambient Thermal Resistance θJA (Note 6)
260°C
ESD Rating (Note 4)
JEDEC Board (microSMD)
(Note 14)
4L Cellphone Board (microSMD)
100.6°C/W
174.8°C/W
Electrical Characteristics
Limits in standard typeface are for TA = 25°C. Limits in boldface type apply over the full operating junction temperature range (-40°
C ≤ TJ ≤ +125°C). Unless otherwise noted, specifications apply to the LP5990 Typical Application Circuit (pg. 1) with: VIN = VOUT
(NOM) + 1.0V, or 2.2V, whichever is higher. VEN = 1.0V, CIN = COUT = 1.0 μF, IOUT = 1.0 mA. (Note 2), (Note 7)
Symbol
VIN
Parameter
Input Voltage
Conditions
Min
2.2
−1
Typ
Max
5.5
1
Units
V
Output Voltage Tolerance
Line Regulation
VIN = (VOUT(NOM) + 1.0V) to 5.5V
%
ΔVOUT
VIN = (VOUT(NOM) + 1.0V) to 5.5V, IOUT = 1
1
5
mV
mV
mA
mA
Load Regulation
IOUT = 1 mA to 200 mA
15
75
ILOAD
IQ
Load Current
(Note 8)
0
Maximum Output Current
Quiescent Current (Note 10)
200
VEN = 1.0V, IOUT = 0 mA
VEN = 1.0V, IOUT = 200 mA
VEN = <0.35V (Disabled)
IOUT = 200 mA
30
35
µA
0.01
160
600
55
VDO
Dropout Voltage(Note 9)
Short Circuit Current Limit
250
mV
mA
ISC
(Note 11)
PSRR
Power Supply Rejection Ratio
(Note 13)
f = 10 kHz, IOUT = 200 mA
dB
en
Output Noise Voltage
(Note 13)
BW = 10 Hz to 100 kHz, V OUT = 1.8V
VIN = 4.2V, IOUT = 1 mA
V OUT = 2.8V
60
85
μVRMS
TSHUTDOWN Thermal Shutdown
Temperature
Hysteresis
160
20
°C
3
www.national.com
Electrical Characteristics (continued).
Limits in standard typeface are for TA = 25°C. Limits in boldface type apply over the full operating junction temperature range (-40°
C ≤ TJ ≤ +125°C). Unless otherwise noted, specifications apply to the LP5990 Typical Application Circuit (pg. 1) with: VIN = VOUT
(NOM) + 1.0V, or 2.2V, whichever is higher. VEN = 1.0V, CIN = COUT = 1.0 μF, IOUT = 1.0 mA. (Note 2), (Note 7)
Symbol
Parameter
Conditions
Min
Typ
Max
0.35
5
Units
Enable Input Thresholds
VIL
VIH
IEN
Low Input Threshold (VEN
)
VIN = 2.2V to 5.5V
V
V
High Input Threshold (VEN
)
VIN = 2.2V to 5.5V
1.0
Input Current at VEN Pin
(Note 12)
VEN = 5.5V and VIN = 5.5V
VEN = 0.0V and VIN = 5.5V
2
μA
0.001
Transient Characteristics
Line Transient
(Note 13)
4
ΔVOUT
Trise = Tfall = 30μs. ΔVIN = 600 mV
mV
mV
Load Transient
(Note 13)
–50
50
IOUT = 1 mA to 200 mA in 1 μs
IOUT = 200 mA to 1 mA in 1 μs
To 98% of VOUT(NOM)
TON
Turn on Time
60
μs
μs
TOFF
Turn off Time from Enable
100mV of V OUT(NOM)I OUT= 0mA
500
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation
of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions,
see the Electrical Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage.
Note 4: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin. MIL-STD-883 3015.7
Note 5: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be
derated. Maximum ambient temperature (TA-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP = 125°C), the maximum power
dissipation of the device in the application (PD-MAX), and the junction-to ambient thermal resistance of the part/package in the application (θJA), as given by the
following equation: TA-MAX = TJ-MAX-OP – (θJA × PD-MAX). See applications section.
Note 6: Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power dissipation exists,
special care must be paid to thermal dissipation issues in board design.
Note 7: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm.
Note 8: The device maintains a stable, regulated output voltage without a load current.
Note 9: Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100 mV below its nominal value. This
parameter only applies to output voltages above 2.8V.
Note 10: Quiescent current is defined here as the difference in current between the input voltage source and the load at VOUT
.
Note 11: Short Circuit Current is measured with VOUT pulled to 0V.
Note 12: There is a 3 MΩ resistor between VEN and ground on the device.
Note 13: This specification is guaranteed by design.
Note 14: Detailed description of the board can be found in JESD51-7
Output & Input Capacitor, Recommended Specifications
Symbol
CIN
Parameter
Input Capacitance
Conditions
Min
0.3
0.3
5
Nom
1.0
Max
Units
Capacitance for stability
µF
COUT
ESR
Output Capacitance
1.0
10
Output/Input Capacitance
500
mΩ
Note: The minimum capacitance should be greater than 0.3 µF over the full range of operating conditions. The capacitor tolerance should be 30% or better over
the full temperature range. The full range of operating conditions for the capacitor in the application should be considered during device selection to ensure this
minimum capacitance specification is met. X7R capacitors are recommended however capacitor types X5R, Y5V and Z5U may be used with consideration of the
application and conditions.
www.national.com
4
Typical Performance Characteristics. Unless otherwise specified,CIN = COUT = 1.0µF, VIN = VOUT
(NOM) + 1.0V, VEN = 1.0V, IOUT = 1mA , T A = 25°C.
Output Voltage Change vs Temperature
Ground Current vs Load Current
20184899
20184843
Ground Current vs V IN.I LOAD= 1mA
Ground Current vs VIN. I LOAD = 200mA
20184854
20184851
Dropout Voltage
Load Transient Response VOUT = 2.8V
20184889
20184887
5
www.national.com
Typical Performance Characteristics (continued). Unless otherwise specified,CIN = COUT
=
1.0µF, VIN = VOUT(NOM) + 1.0V, VEN = 1.0V, IOUT = 1mA , T A = 25°C.
Load Transient Response. VOUT = 2.8V
Short Circuit Current
Line Transient Response
Shutdown Characteristics
20184888
20184886
Line Transient Response
20184895
20184885
Start-up Time
20184890
20184893
www.national.com
6
Typical Performance Characteristics (continued). Unless otherwise specified,CIN = COUT
=
1.0µF, VIN = VOUT(NOM) + 1.0V, VEN = 1.0V, IOUT = 1mA , T A = 25°C.
Power Supply Rejection ratio
Output Noise Density
20184844
20184845
7
www.national.com
Other ceramic capacitors such as Y5V and Z5U are less suit-
able owing to their inferior temperature characteristics. (See
section in Capacitor Characteristics).
Application Hints
POWER DISSIPATION AND DEVICE OPERATION
For this device the output capacitor should be connected be-
tween the VOUT pin and a good ground connection and should
be mounted within 1 cm of the device.
The permissible power dissipation for any package is a mea-
sure of the capability of the device to pass heat from the power
source, the junctions of the IC, to the ultimate heat sink, the
ambient environment. Thus the power dissipation is depen-
dent on the ambient temperature and the thermal resistance
across the various interfaces between the die and ambient
air. As stated in (Note 5) of the electrical characteristics, the
allowable power dissipation for the device in a given package
can be calculated using the equation:
It may also be possible to use tantalum or film capacitors at
the device output, VOUT, but these are not as attractive for
reasons of size and cost (see the section Capacitor Charac-
teristics).
The output capacitor must meet the requirement for the min-
imum value of capacitance (0.3μF) and have an ESR value
that is within the range 5 mΩ to 500 mΩ for stability.
CAPACITOR CHARACTERISTICS
The LP5990 is designed to work with ceramic capacitors on
the input and output to take advantage of the benefits they
offer. For capacitance values in the range of 1.0 μF to 4.7
μF, ceramic capacitors are the smallest, least expensive and
have the lowest ESR values, thus making them best for elim-
inating high frequency noise. The ESR of a typical 1.0 μF
ceramic capacitor is in the range of 20 mΩ to 40 mΩ, which
easily meets the ESR requirement for stability for the LP5990
The actual power dissipation across the device can be rep-
resented by the following equation:
PD = (VIN – VOUT) x IOUT
This establishes the relationship between the power dissipa-
tion allowed due to thermal consideration, the voltage drop
across the device, and the continuous current capability of the
device. These two equations should be used to determine the
optimum operating conditions for the device in the application.
For both input and output capacitors careful interpretation of
the capacitor specification is required to ensure correct device
operation. The capacitor value can change greatly depending
on the conditions of operation and capacitor type.
EXTERNAL CAPACITORS
In particular the output capacitor selection should take ac-
count of all the capacitor parameters to ensure that the spec-
ification is met within the application.Capacitance value can
vary with DC bias conditions as well as temperature and fre-
quency of operation. Capacitor values will also show some
decrease over time due to aging. The capacitor parameters
are also dependant on particular case size with smaller sizes
giving poorer performance figures in general. As an example
Figure 1 shows a typical graph showing a comparison of ca-
pacitor case sizes in a Capacitance versus DC Bias plot. As
shown in the graph, as a result of the DC Bias condition, the
capacitance value may drop below the minimum capacitance
value given in the recommended capacitor table (0.3µF in this
case). Note that the graph shows the capacitance out of spec
for the 0402 case size capacitor at higher bias voltages. It is
therefore recommend that the capacitor manufacturer's spec-
ifications for the nominal value capacitor are consulted for all
conditions as some capacitors may not be suited in the ap-
plication.
Like any low-dropout regulator, the LP5990 requires external
capacitors for regulator stability. The LP5990 is specifically
designed for portable applications requiring minimum board
space and smallest components. These capacitors must be
correctly selected for good performance.
INPUT CAPACITOR
An input capacitor is required for stability. The input capacitor
should be at least equal to or greater than the output capac-
itor. It is recommended that a 1.0 µF capacitor be connected
between the LP5990 input pin and ground.
This capacitor must be located a distance of not more than 1
cm from the input pin and returned to a clean analogue
ground. Any good quality ceramic, tantalum, or film capacitor
may be used at the input.
Important: To ensure stable operation it is essential that
good PCB practices are employed to minimize ground
impedance and keep input inductance low. If these conditions
cannot be met, or if long leads are to be used to connect the
battery or other power source to the LP5990, then it is rec-
ommended to increase the input capacitor to at least 2.2µF.
Also, tantalum capacitors can suffer catastrophic failures due
to surge current when connected to a low-impedance source
of power (like a battery or a very large capacitor). If a tantalum
capacitor is used at the input, it must be guaranteed by the
manufacturer to have a surge current rating sufficient for the
application. There are no requirements for the ESR (Equiva-
lent Series Resistance) on the input capacitor, but tolerance
and temperature coefficient must be considered when select-
ing the capacitor to ensure the capacitance will remain 0.3
μF over the entire operating temperature range.
The temperature performance of ceramic capacitors varies by
type and manufacturer. Most large value ceramic capacitors
(≥2.2 µF) are manufactured with Z5U or Y5V temperature
characteristics, which results in the capacitance dropping by
more than 50% as the temperature goes from 25°C to 85°C.
A better choice for temperature coefficient in a ceramic ca-
pacitor is X7R. This type of capacitor is the most stable and
holds the capacitance within ±15% over the temperature
range. Tantalum capacitors are less desirable than ceramic
for use as output capacitors because they are more expen-
sive when comparing equivalent capacitance and voltage
ratings in the 0.47 μF to 4.7 μF range.
Another important consideration is that tantalum capacitors
have higher ESR values than equivalent size ceramics. This
means that while it may be possible to find a tantalum capac-
itor with an ESR value within the stable range, it would have
to be larger in capacitance (which means bigger and more
costly) than a ceramic capacitor with the same ESR value. It
should also be noted that the ESR of a typical tantalum will
OUTPUT CAPACITOR
The LP5990 is designed specifically to work with very small
ceramic output capacitors. A ceramic capacitor (dielectric
types X5R or X7R) 1.0 μF, and with ESR between 5 mΩ to
500 mΩ, is suitable in the LP5990 application circuit.
www.national.com
8
increase about 2:1 as the temperature goes from 25°C down
to −40°C, so some guard band must be allowed.
device on. When the enable pin is low, the regulator output is
off and the device typically consumes 3 nA. If the application
does not require the shutdown feature, the VEN pin should be
tied to VIN to keep the regulator output permanently on.
The signal source used to drive the VEN input must be able to
swing above and below the specified turn-on/off voltage
thresholds listed in the Electrical Characteristics section un-
der VIL and VIH.
micro SMD MOUNTING
The micro SMD package requires specific mounting tech-
niques, which are detailed in National Semiconductor Appli-
cation Note AN-1112.
For best results during assembly, alignment ordinals on the
PC board may be used to facilitate placement of the micro
SMD device.
micro SMD LIGHT SENSITIVITY
Exposing the micro SMD device to direct light may cause in-
correct operation of the device. Light sources such as halogen
lamps can affect electrical performance if they are situated in
proximity to the device.
20184840
FIGURE 1. Graph Showing a Typical Variation in
Capacitance vs DC Bias
Light with wavelengths in the red and infra-red part of the
spectrum have the most detrimental effect thus the fluores-
cent lighting used inside most buildings has very little effect
on performance.
NO-LOAD STABILITY
The LP5990 will remain stable and in regulation with no ex-
ternal load.
ENABLE CONTROL
The LP5990 may be switched ON or OFF by a logic input at
the ENABLE pin, VEN . A high voltage at this pin will turn the
9
www.national.com
Physical Dimensions inches (millimeters) unless otherwise noted
4-Bump Thin micro SMD
NS Package Number TMD04 CEA
The dimensions for X1, X2 and X3 are given as:
X1 = 0.866 mm ± 0.030 mm
X2 = 0.917 mm ± 0.030 mm
X3 = 0.600 mm ± 0.075 mm
www.national.com
10
Notes
11
www.national.com
Notes
For more National Semiconductor product information and proven design tools, visit the following Web sites at:
Products
www.national.com/amplifiers
Design Support
Amplifiers
WEBENCH
www.national.com/webench
www.national.com/AU
Audio
www.national.com/audio
www.national.com/timing
www.national.com/adc
Analog University
App Notes
Clock Conditioners
Data Converters
Displays
www.national.com/appnotes
www.national.com/contacts
www.national.com/quality/green
www.national.com/packaging
Distributors
www.national.com/displays
www.national.com/ethernet
www.national.com/interface
www.national.com/lvds
Green Compliance
Packaging
Ethernet
Interface
Quality and Reliability www.national.com/quality
LVDS
Reference Designs
Feedback
www.national.com/refdesigns
www.national.com/feedback
Power Management
Switching Regulators
LDOs
www.national.com/power
www.national.com/switchers
www.national.com/ldo
LED Lighting
PowerWise
www.national.com/led
www.national.com/powerwise
Serial Digital Interface (SDI) www.national.com/sdi
Temperature Sensors
Wireless (PLL/VCO)
www.national.com/tempsensors
www.national.com/wireless
THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION
(“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY
OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO
SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. NO LICENSE, WHETHER EXPRESS,
IMPLIED, ARISING BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS
DOCUMENT.
TESTING AND OTHER QUALITY CONTROLS ARE USED TO THE EXTENT NATIONAL DEEMS NECESSARY TO SUPPORT
NATIONAL’S PRODUCT WARRANTY. EXCEPT WHERE MANDATED BY GOVERNMENT REQUIREMENTS, TESTING OF ALL
PARAMETERS OF EACH PRODUCT IS NOT NECESSARILY PERFORMED. NATIONAL ASSUMES NO LIABILITY FOR
APPLICATIONS ASSISTANCE OR BUYER PRODUCT DESIGN. BUYERS ARE RESPONSIBLE FOR THEIR PRODUCTS AND
APPLICATIONS USING NATIONAL COMPONENTS. PRIOR TO USING OR DISTRIBUTING ANY PRODUCTS THAT INCLUDE
NATIONAL COMPONENTS, BUYERS SHOULD PROVIDE ADEQUATE DESIGN, TESTING AND OPERATING SAFEGUARDS.
EXCEPT AS PROVIDED IN NATIONAL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, NATIONAL ASSUMES NO
LIABILITY WHATSOEVER, AND NATIONAL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO THE SALE
AND/OR USE OF NATIONAL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR
PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY
RIGHT.
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and
whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected
to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform
can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness.
National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other
brand or product names may be trademarks or registered trademarks of their respective holders.
Copyright© 2007 National Semiconductor Corporation
For the most current product information visit us at www.national.com
National Semiconductor
Americas Customer
Support Center
National Semiconductor Europe
Customer Support Center
Fax: +49 (0) 180-530-85-86
National Semiconductor Asia
Pacific Customer Support Center
Email: ap.support@nsc.com
National Semiconductor Japan
Customer Support Center
Fax: 81-3-5639-7507
Email:
new.feedback@nsc.com
Tel: 1-800-272-9959
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +49 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
Email: jpn.feedback@nsc.com
Tel: 81-3-5639-7560
www.national.com
相关型号：
LP5990TMX-1.2/NOPB
IC VREG 1.2 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PBGA4, 0.917 X 0.866 MM, 0.40 MM PITCH, LEAD FREE, MICRO, SMD-4, Fixed Positive Single Output LDO Regulator
NSC
LP5990TMX-1.8/NOPB
IC VREG 1.8 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PBGA4, 0.917 X 0.866 MM, 0.40 MM PITCH, LEAD FREE, MICRO, SMD-4, Fixed Positive Single Output LDO Regulator
NSC
LP5990TMX-2.8/NOPB
IC VREG 2.8 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PBGA4, 0.917 X 0.866 MM, 0.40 MM PITCH, LEAD FREE, MICRO, SMD-4, Fixed Positive Single Output LDO Regulator
NSC
LP5990TMX-3.3/NOPB
IC VREG 3.3 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PBGA4, 0.917 X 0.866 MM, 0.40 MM PITCH, LEAD FREE, MICRO, SMD-4, Fixed Positive Single Output LDO Regulator
NSC
©2020 ICPDF网 联系我们和版权申明