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LP3958TL 数据表(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LP3958TL
功能描述  Lighting Management Unit with High Voltage Boost Converter
PDF  28 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3958TL 数据表(HTML) 5 Page - National Semiconductor (TI)

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Electrical Characteristics (Notes 2, 8)
Limits in standard typeface are for T
J =25
o C. Limits in boldface type apply over the operating ambient temperature range
(-30oC < T
A < +85
oC). Unless otherwise noted, specifications apply to the LP3958 Block Diagram with: V
DD1,2 = 3.0 ... 5.5V,
C
VDD =CVDDIO = 100nF, COUT = 2 x 4.7µF, CIN = 10µF, CVDDA = 1µF, CVREF = 100nF, L1 = 10µH, RKEY = 8.2k
Ω and R
RT =
82k
Ω (Note 9).
Symbol
Parameter
Condition
Min
Typ
Max
Units
I
VDD
Standby supply current
(V
DD1,VDD2)
NSTBY = L
Register 0DH=08H (Note 10)
1.7
7
µA
No-boost supply current
(V
DD1,VDD2)
NSTBY = H,
EN_BOOST = L
300
800
µA
No-load supply current
(V
DD1,VDD2)
NSTBY = H,
EN_BOOST = H
Autoload OFF
750
1300
uA
V
DDA
Output voltage of internal LDO
I
VDDA = 1mA
2.80
V
-3
+3
%
V
REF
Reference voltage (Note 11)
1.23
V
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 pins.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ=150
oC (typ.) and disengages at
TJ=130
oC (typ.).
Note 4: For detailed soldering specifications and information, please refer to National Semiconductor Application Note AN1112 : Micro SMD Wafer Level Chip Scale
Package
Note 5: The Human body model is a 100pF capacitor discharged through a 1.5k
Ω resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin. MIL-STD-883 3015.7
Note 6: 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
oC), 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 xPD-MAX).
Note 7: 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 8: 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 9: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
Note 10: Boost output voltage set to 8V (08H in register 0DH) to prevent any unneccessary current consumption.
Note 11: No external loading allowed for VREF pin.
www.national.com
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