參數(shù)資料
型號(hào)： LP3907SQ-JIXI
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 1.5 A DUAL SWITCHING CONTROLLER, 2100 kHz SWITCHING FREQ-MAX, QCC24
封裝： 4 X 4 MM, 0.8 MM HEIGHT, LLP-24
文件頁(yè)數(shù)： 44/44頁(yè)
文件大?。?/td> 3058K
代理商： LP3907SQ-JIXI
I/O Electrical Characteristics
Unless otherwise noted: Typical values and limits appearing in normal type apply for T
J = 25°C. Limits appearing in boldface
type
apply over the entire junction temperature range for operation, T
J = 0°C to +125°C. (Note 13)
Symbol
Parameter
Conditions
Limit
Units
Min
Max
V
IL
Input Low Level
0.4
V
IH
Input High Level
1.2
V
Power On Reset Threshold/Function (POR)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
nPOR
nPOR = Power on reset forBuck1 and
Buck2
Default
50
ms
nPOR
threshold
Percentage of Target voltage Buck1 or
Buck2
V
BUCK1 AND VBUCK2 rising
94
%
V
BUCK1 OR VBUCK2 falling
85
VOL
Output Level Low
Load = IoL = 500mA
0.23
0.5
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.
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. Thermal shutdown engages at T
J = 160°C (typ.) and disengages at TJ
= 140°C (typ.)
Note 4:
The Human body model is a 100pF capacitor discharged through a 1.5k
resistor into each pin. (MILSTD - 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 (T
A-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP = 125°C), the maximum power
dissipation of the device in the application (P
D-MAX), and the junction-to-ambient thermal resistance of the part/package in the application (θJA), as given by the
following equation: T
A-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:
C
IN, COUT: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
Note 9:
The device maintains a stable, regulated output voltage without a load.
Note 10:
Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100mV below its nominal value.
Note 11:
Quiescent current is defined here as the difference in current between the input voltage source and the load at V
OUT.
Note 12:
V
IN minimum for line regulation values is 1.8V.
Note 13:
This specification is guaranteed by design.
Note 14:
The I
Q can be defined as the standing current of the LP3907 when the I
2
C bus is active and all other power blocks have been disabled via the I2C
bus
, or it can be defined as the I2C bus active, and the other power blocks are active under no load condition. These two values can be used by the system
designer when the LP3907 is powered using a battery.
Note 15:
Pins 24, 19 can operate from V
IN min of 1.74 to a VIN max of 5.5V. This rating is only for the series pass PMOS power FET. It allows the system design
to use a lower voltage rating if the input voltage comes from a buck output.
Note 16:
The I
Q exhibits a higher current draw when the EN pin is de-asserted because the I
2
2 buffer pins draw an additional 2A.
Note 17:
VPOR is voltage at which the EPROM resets. This is different from the UVLO on VINLDO12, which is the voltage at which the regulators shut off; and
is also different from the nPOR function, which signals if the regulators are in a specified range.
Note 18:
Buck V
IN ≥ VOUT + 1V.
9
www.national.com
LP3907
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP3907SQ-JXQX 制造商:Texas Instruments 功能描述:
LP3907SQ-JXQX/NOPB 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
LP3907SQ-JXQX/S7001874 制造商:Texas Instruments 功能描述:NSCLP3907SQ-JXQX@S7001874 1A&0.6A BUCKS
LP3907SQ-JXQXEV 功能描述:LP3907 EVALUATION BOARD RoHS:否 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類(lèi)型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開(kāi)關(guān):3MHz 板類(lèi)型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LP3907SQ-JXQXEV/NOPB 功能描述:BOARD EVAL FOR LP3907 RoHS:是 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類(lèi)型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開(kāi)關(guān):3MHz 板類(lèi)型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
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