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參數(shù)資料
| 型號(hào)： | LP5952TL-1.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 350mA Dual Rail Linear Regulator |
| 中文描述： | 1.3 V FIXED POSITIVE REGULATOR, PBGA5 |
| 封裝： | LEAD FREE, SMD, 5 PIN |
| 文件頁(yè)數(shù)： | 13/16頁(yè) |
| 文件大小： | 3706K |
| 代理商： | LP5952TL-1.3 |
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FAST TURN ON
Fast turn-on is guaranteed by an optimized architecture al-
lowing a fast ramp of the output voltage to reach the target
voltage while the inrush current is controlled low at 120mA
typical (for a C
OUT
of 2.2μF).
SHORT-CIRCUIT PROTECTION
The LP5952 is short circuit protected and in the event of a
peak over-current condition, the output current through the
NFET pass device will be limited.
If the over-current condition exists for a longer time, the av-
erage power dissipation will increase depending on the input
to output voltage difference until the thermal shutdown cir-
cuitry will turn off the NFET.
Please refer to the section on thermal information for power
dissipation calculations.
THERMAL-OVERLOAD PROTECTION
Thermal-Overload Protection limits the total power dissipation
in the LP5952. When the junction temperature exceeds T
J
=
165°C typ., the shutdown logic is triggered and the NFET is
turned off, allowing the device to cool down. After the junction
temperature dropped by 20°C (temperature hysteresis) typi-
cal, the NFET is activated again. This results in a pulsed
output voltage during continuous thermal-overload condi-
tions.
The Thermal-Overload Protection is designed to protect the
LP5952 in the event of a fault condition. For normal, continu-
ous operation, do not exceed the absolute maximum junction
temperature rating of T
J
= +150°C (see Absolute Maximum
Ratings).
REVERSE CURRENT PATH
The internal NFET pass device in LP5952 has an inherent
parasitic body diode. During normal operation, the input volt-
age is higher than the output voltage and the parasitic diode
is reverse biased. However, if the output is pulled above the
input in an application, then current flows from the output to
the input as the parasitic diode gets forward biased. The out-
put can be pulled above the input as long as the current in the
parasitic diode is limited to 50mA. For currents above this limit
an external Schottky diode must be connected from V
OUT
to
V
IN
(cathode on V
IN
, anode on V
OUT
).
EVALUATION BOARDS
For availability of evaluation boards please refer to the Prod-
uct Folder of LP5952 at www.national.com.
For information regarding evaluation boards, please refer to
Application Note: AN-1531.
13
www.national.com
L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP5952TL-1.4 | 350mA Dual Rail Linear Regulator |
| LP5952TL-1.5 | 350mA Dual Rail Linear Regulator |
| LP5952TL-1.6 | 350mA Dual Rail Linear Regulator |
| LP5952TL-1.8 | 350mA Dual Rail Linear Regulator |
| LP5952TL-2.0 | 350mA Dual Rail Linear Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP5952TL-2.0 | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 2V 0.35A 5-Pin uSMD T/R |
| LP5952TL-2.0/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP5952TLX-0.7/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP5952TLX-1.0/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP5952TLX-1.2/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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