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參數(shù)資料
| 型號： | L6932D12 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| 中文描述： | 高性能甲ULDO線性穩(wěn)壓器 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 355K |
| 代理商： | L6932D12 |
7/10
L6932
Loop Stability
The stability of the loop is affected by the zero introduced by the output capacitor.
The time constant of the zero is given by:
This zero helps to increase the phase margin of the loop until the time constant is higher than some hundreds
of nsec, depending also on the output voltage and current.
So, using very low ESR ceramic capacitors could produce oscillations at the output, in particular when regulating
high output voltages (adjustable version).
To solve this issue is sufficient to add a small capacitor (e.g. 1nF to 10nF) in parallel to the high side resistor of
the external divider, as shown in figure 9.
Figure 9. Compensation Network
Thermal Considerations
Since the device is housed in a small SO(4+2+2) package the thermal issue can be the bottleneck of many ap-
plications. The power dissipated by the device is given by:
P
DISS
= (V
IN
- V
OUT
) · I
OUT
The thermal resistance junction to ambient of the demoboard is approximately 62°C/W. This mean that, consid-
ering an ambient temperature of 60°C and a maximum junction temperature of 150°C, the maximum power that
the device can handle is 1.5W.
This means that the device is able to deliver a DC output current of 2A only with a very low dropout.
In many applications, high output current pulses are required. If their duration is shorter than the thermal con-
stant time of the board, the thermal impedance (not the thermal resistance) has to be considered.
In figure 10 the thermal impedance versus the duration of the current pulse for the SO(4+2+2) mounted on board
is shown.
T
ESR C
OUT
=
F
ZERO
2
π
ESR C
OUT
--------------------------------------------
=
VOUT=1.2V TO 5V UP to 2A
VIN=2V TO 14V
C1
OUT
1
3
7
5
6
4
8
2
L6932D1.2
GND
C2
IN
EN
ADJ
R1
R2
C3
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PDF描述 |
|---|---|
| L6932D18 | HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| L6932D18TR | HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| L6932D2.5 | HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| L6932D2.5TR | HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| L6932D25 | HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6932D12TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| L6932D18 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| L6932D18TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR |
| L6932D2.5 | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 2A Ultra 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L6932D2.5TR | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 2A Ultra 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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