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參數(shù)資料
| 型號(hào)： | MAX687CPA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | High-Accuracy, Low-Dropout Linear Regulators |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 9/12頁(yè) |
| 文件大?。?/td> | 103K |
| 代理商： | MAX687CPA |
__________Applic ations Information
High-Power Output Circ uit
Figure 3 shows a pseudo-Darlington transistor configu-
ration to increase load-current capability and maintain
a low dropout voltage with a 4A load. A heatsink must
be added when high power is dissipated in the pass
transistor.
Figure 4 shows the (V
IN
- V
OUT
) voltage required to
maintain regulation for different load currents. Figure 5
shows an oscilloscope plot of the transient response of
a 200mA to 4A load step.
M
High-Ac c urac y, Low-Dropout
Linear Regulators
_______________________________________________________________________________________
9
MAX688
MAX689
OUT
3.3V/ 3.0V @ 4A
PFO
CC
C1
220
μ
F
+5V INPUT
BLIM
GND
BASE
IN
Q2
2N4403
C3
10nF
SHDN
R2
100k
C2
470
μ
F
x3
Q1
T1P42
10
1k
ON / OFF
POWER FAIL
Figure 3. 4A Low-Dropout Circuit
1.0
0
0
4000
1000
2000
3000
DROPOUT VOLTAGE vs. LOAD CURRENT
0.2
0.1
0.4
0.3
0.6
0.5
0.8
0.9
0.7
M
LOAD CURRENT (mA)
V
I
O
Q1 = TIP42
BASE = BLIM
Figure 4. Dropout Voltage vs. Load Current of Figure 3
V
+3.3V, 20mV/div
I
1A/div
50
μ
s/div
LOAD-TRANSIEN
Figure 5. Transient Response for a 200mA to 4A Load Step
Using Circuit of Figure 3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX687CSA | 功能描述:低壓差穩(wěn)壓器 - LDO High-Accuracy 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX687CSA+ | 功能描述:低壓差穩(wěn)壓器 - LDO High-Accuracy 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX687CSA+T | 功能描述:低壓差穩(wěn)壓器 - LDO High-Accuracy 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX687CSA-T | 功能描述:低壓差穩(wěn)壓器 - LDO High-Accuracy 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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX687CUA | 功能描述:低壓差穩(wěn)壓器 - LDO High-Accuracy 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(lèi)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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