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參數(shù)資料
| 型號： | MAX687CUA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | High-Accuracy, Low-Dropout Linear Regulators |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封裝： | MICRO MAX PACKAGE-8 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大小： | 103K |
| 代理商： | MAX687CUA |
__________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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX687CUA-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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(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 |
| MAX687EPA | 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(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 |
| MAX687ESA | 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(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 |
| MAX687ESA-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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(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 |
| MAX6880ETG | 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 |
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