參數(shù)資料
型號： SPX29301
元件分類： 基準電壓源/電流源
英文描述： 3A High Current, Low Dropout Voltage Regulator(3A大電流,低壓差電壓穩(wěn)壓器)
中文描述： 第3A大電流，低壓差穩(wěn)壓器（3A條大電流，低壓差電壓穩(wěn)壓器）
文件頁數(shù)： 5/7頁
文件大?。?/td> 53K
代理商： SPX29301
5
Rev. 3/11/02
SP29300/01/02/03 3A Low Dropout Voltage Regulator
Copyright 2002 Sipex Corporation
APPLICATION INFORMATION
The SPX29300/01/02/03 incorporates protec-
tion against over-current faults, reversed load
insertion, over temperature operation, and
positive and negative transient voltage.
Thermal Considerations
Although the SPX29300/01/02/03 offers
limiting circuitry for overload conditions, it is
still necessary to insure that the maximum
junction temperature is not exceeded in the
application. Heat will flow through the lowest
resistance path, the junction-to-case path. In
order to insure the best thermal flow of the
component, proper mounting is required.
TO-220 Design Example:
Assume that V
= 10V, V
= 5V, I
OUT
=
1.5A, T
= 50
°
C,
θ
= 1
°
C/W,
θ
CH
= 2
C/W,
and
θ
JC
= 3C
°
/W, where:
T
A
= ambient temperature,
θ
HA
= heatsink to ambient thermal
resistance
θ
CH
= case to heatsink thermal
resistance
θ
JC
= junction to case thermal
resistance
The power calculated under these conditions
is:
P
D
= (V
IN
– V
OUT
) * I
OUT
= 7.5W.
And the junction temperature is calculated as
T
J
= T
+ P
* (
θ
+
θ
+
θ
JC
) or
T
J
= 50 + 7.5 * (1+2+3) = 95
°
C
Reliable operation is insured.
Capacitor Requirements
The output capacitor is needed to insure
stability and minimize the output noise. The
value of the capacitor varies with the load.
However, a minimum value of 10
μ
F alumi-
num capacitor will guarantee stability over all
load conditions. A tantalum capacitor is
recommended if a faster load transient
response is needed. If the power source has a
high AC impedance, a 0.1
μ
F ceramic capaci-
tor between input & ground is recommended.
Minimum Load Current
To ensure a proper behavior of the regulator
under light load, a minimum load of 5mA for
SPX29300/01/02/03 is required.
Adjustable Regulator Design
The SPX29302/03 are adjustable regulators
that can be programmed to any value between
1.25V and 16V using 2 resistors, R1 and R2.
The relationship between the resistors is:
R1 = R2(Vout/1.240-1).
Error Flag
The SPX29301/03 features an error flag that
indicates either an over current or under
voltage condition. The flag output goes low,
sinking 10mA when either condition occurs.
Enable Input
The SPX29301/02 have an Enable function
that switches the regulator on and off. Their
thresholds are TTL compatible. When the
regulator is active, approximately 20 uA flows
through the Enable pin.
Typical Application Circuits
Figure 1 represents at typical fixed output
regulator. Figure 2 represents an adjustable
output regulator. The values of R1 and R2 set
the output voltage value as follows:
V
=V
* [1 + (R1/R2)].
For best results, the total series resistance
should be small enough to pass a minimum
regulator load current of 5 mA. A minimum
value of 10kohms is recommended for R2
with a range between 10kohms and 47 kohms.
相關PDF資料
PDF描述
SPX29302 3A High Current, Low Dropout Voltage Regulator(3A大電流,低壓差電壓穩(wěn)壓器)
SPX29302A 3A High Current, Low Dropout Voltage Regulator Adjustable, Fast Response Time
SPX29302AT5 3A High Current, Low Dropout Voltage Regulator Adjustable, Fast Response Time
SPX29302AU5 3A High Current, Low Dropout Voltage Regulator Adjustable, Fast Response Time
SPX29303 3A High Current, Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response Time
相關代理商/技術參數(shù)
參數(shù)描述
SPX29301T5-L-3-3 功能描述:低壓差穩(wěn)壓器 - LDO 3A LOW DROPOUT 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
SPX29301T5-L-3-3/TR 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel
SPX29301T5-L-5-0 功能描述:低壓差穩(wěn)壓器 - LDO 3A LOW DROPOUT 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
SPX29301T5-L-5-0/TR 功能描述:低壓差穩(wěn)壓器 - LDO 3A LOW DROPOUT 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20
SPX29301U5 制造商:Exar Corporation 功能描述:
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*