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参数资料
| 型号： | MAX687CSA-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | High-Accuracy, Low-Dropout Linear Regulators |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封装： | 0.150 INCH, SO-8 |
| 文件页数： | 12/12页 |
| 文件大小： | 103K |
| 代理商： | MAX687CSA-T |
__________Applications Information
High-Power Output Circuit
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 (VIN - VOUT) 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.
MAX687/MAX688/MAX689
High-Accuracy, Low-Dropout
Linear Regulators
_______________________________________________________________________________________
9
MAX688
MAX689
OUT
3.3V/ 3.0V @ 4A
PFO
CC
C1
220
F
+5V INPUT
BLIM
GND
BASE
Q2
2N4403
C3
10nF
IN
SHDN
R2
100k
C2
470
F
x3
Q1
T1P42
10
1k
ON / OFF
POWER FAIL
Figure 3. 4A Low-Dropout Circuit
1.0
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
MAX687/9-04
LOAD CURRENT (mA)
V
IN
-
V
OUT
(V)
Q1 = TIP42
Q2 = 2N4403
BASE = BLIM
Figure 4. Dropout Voltage vs. Load Current of Figure 3
VOUT
+3.3V, 20mV/div
IOUT
1A/div
50
s/div
LOAD-TRANSIENT RESPONSE
Figure 5. Transient Response for a 200mA to 4A Load Step
Using Circuit of Figure 3
相关PDF资料 |
PDF描述 |
|---|---|
| MAX687CUA-T | High-Accuracy, Low-Dropout Linear Regulators |
| MAX687ESA-T | High-Accuracy, Low-Dropout Linear Regulators |
| MAX688CSA-T | High-Accuracy, Low-Dropout Linear Regulators |
| MAX688CUA-T | High-Accuracy, Low-Dropout Linear Regulators |
| MAX688ESA-T | High-Accuracy, Low-Dropout Linear Regulators |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX687CUA | 功能描述:低压差稳压器 - LDO High-Accuracy LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX687CUA-T | 功能描述:低压差稳压器 - LDO High-Accuracy LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX687EPA | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX687ESA | 功能描述:低压差稳压器 - LDO High-Accuracy LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX687ESA-T | 功能描述:低压差稳压器 - LDO High-Accuracy LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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