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| 型号： | MAX603CSA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V/ADJ .5A 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 5V，1.25 V ~ 11 V |
| 输入电压： | 2.7 V ~ 11.5 V |
| 电压 - 压降（标准）： | 0.32V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1408 (CN2011-ZH PDF) |
MAX603/MAX604
5V/3.3V or Adjustable, Low-Dropout,
Low I Q , 500mA Linear Regulators
IN
OUT
OUTPUT
__________Applications Information
Figure 6 illustrates the typical application for the
MAX603/MAX604.
C IN
BATTERY
MAX603
MAX604
OFF
GND SET
Figure 6. 3.3V or 5V Linear-Regulator Application
VOLTAGE
C OUT
10 μ F
Capacitor Selection and
Regulator Stability
Normally, use 0.1μF to 10μF capacitors on the input
and 10μF on the output of the MAX603/MAX604. The
larger input capacitor values provide better supply-
noise rejection and line-transient response. Improve
load-transient response, stability, and power-supply
rejection by using large output capacitors. For stable
operation over the full temperature range and with load
currents up to 500mA, 10μF is recommended. Using
capacitors smaller than 3.3μF can result in oscillation.
90
80
70
60
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
I OUT = 1mA
Noise
The MAX603/MAX604 exhibit 3mVp-p to 4mVp-p of
noise during normal operation. This is negligible in most
applications. When using the MAX603/MAX604 in appli-
cations that include analog-to-digital converters of
greater than 12 bits, consider the ADC’s power-supply
rejection specifications. Refer to the output noise plot in
the Typical Operating Characteristics.
C OUT = 10 μ F
50
40
30
20 V IN = 1V p-p I OUT = 100mA
FOR f < 400kHz
10 C IN = 0 μ F
0
10 0 10 1 10 2 10 3 10 4 10 5 10 6
FREQUENCY (Hz)
Figure 7. Power-Supply Rejection Ratio vs. Ripple Frequency
the more positive of the two. The control circuitry can
then remain functioning and turn the pass transistor off,
limiting reverse currents back through the device. This
feature allows a backup regulator or battery pack to
maintain V OUT when the supply at IN fails.
Reverse-current protection activates when the voltage
on IN falls 6mV (20mV maximum) below the voltage on
OUT. Before this happens, currents as high as several
milliamperes can flow back through the device. After
switchover, typical reverse currents are limited to
0.01μA for as long as the condition exists.
Maxim Integrated
PSRR and Operation from Sources
Other than Batteries
The MAX603/MAX604 are designed to deliver low
dropout voltages and low quiescent currents in battery-
powered systems. Achieving these objectives requires
trading off power-supply noise rejection and swift
response to supply variations and load transients.
Power-supply rejection is 80dB at low freqencies and
rolls off above 10Hz. As the frequency increases above
10kHz, the output capacitor is the major contributor to
the rejection of power-supply noise (Figure 7). Do not
use power supplies with ripple above 100kHz, especial-
ly when the ripple exceeds 100mVp-p. When operating
from sources other than batteries, improved supply-
noise rejection and transient response can be achieved
by increasing the values of the input and output capaci-
tors, and through passive filtering techniques. The
Typical Operating Characteristics show the MAX603/
MAX604 supply and load-transient responses.
Transient Considerations
The Typical Operating Characteristics show the
MAX603/MAX604 load-transient response. Two compo-
nents of the output response can be observed on the
load-transient graphs—a DC shift from the output imped-
ance due to the different load currents, and the transient
response. Typical transients for step changes in the load
current from 5mA to 500mA are 0.2V. Increasing the out-
put capacitor’s value attenuates transient spikes.
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX603CSA+ | 功能描述:低压差稳压器 - LDO 3.3/5/AdjV 500mA 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 |
| MAX603CSA+T | 功能描述:低压差稳压器 - LDO 3.3/5/AdjV 500mA 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 |
| MAX603CSA-T | 功能描述:低压差稳压器 - LDO 3.3/5/AdjV 500mA 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 |
| MAX603CSA-TG096 | 制造商:Maxim Integrated Products 功能描述: |
| MAX603EPA | 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 |
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