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| 型号： | MAX882ESA |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V/ADJ .2A 8SOIC |
| 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： | 3.3V，1.25 V ~ 11 V |
| 输入电压： | 2.9 V ~ 11.5 V |
| 电压 - 压降（标准）： | 0.32V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 200mA |
| 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 |
5V/3.3V or Adjustable, Low-Dropout,
Low I Q , 200mA Linear Regulators
OUTPUT
IN
OUT
VOLTAGE
ON/OFF
OFF (STBY)
OUTPUT
BATTERY
R1
OFF (STBY)
R3
INPUT
VOLTAGE
*
IN
OUT
VOLTAGE
LBI
MAX882
LBO
LBI
MAX882
C IN R2
O.1 μ F
GND
MAX883
MAX884
SET
POWER-
FAIL C OUT
INDICATION 2.2 μ F
BATTERY
C IN
O.1 μ F
SET
MAX883
MAX884
GND
C OUT
2.2 μ F
( ) ARE FOR MAX882.
( ) ARE FOR MAX882.
, V LBI = 1.20V
V LBI TRIP = V LBI
R1 + R2
R2
* OPTIONAL REVERSE BATTERY PROTECTION
Figure 6. Using the Low-Battery Comparator to Monitor Battery
Voltage
Reverse-Current Protection
The MAX882/MAX883/MAX884 have a unique protection
scheme that limits reverse currents when the input volt-
age falls below the output. It monitors the voltages on IN
and OUT and switches the IC’s substrate and power bus
to the more positive of the two. The control circuitry is
then able to remain functioning and turn the pass transis-
tor off, limiting reverse currents back through to the input
of the device. In this mode, typical current into OUT to
GND is 15μA at V OUT = 3.3V and 50μA at V OUT = 5V.
Reverse-current protection activates when the voltage
on IN falls 6mV (or 20mV max) below the voltage on
OUT. Before this happens, currents as high as several
milliamperes can flow back through the device.
Low-Battery-Detection Comparator
The MAX882/MAX883/MAX884 provide a low-battery com-
parator that compares the voltage on the LBI pin to the
1.20V internal reference. LBO , an open-drain output, goes
low when LBI is below 1.20V. Hysteresis of 7mV has been
added to the low-battery comparator to provide noise
immunity during switching. LBO remains functional in stand-
by mode for the MAX882, but is undefined in OFF mode for
the MAX883 and MAX884. Tie LBI to IN when not used.
Use a resistor-divider network as shown in Figure 6 to set
the low-battery trip voltage. Current into the LBI input is
±50nA (max), so R2 can be as large as 1M ? . Add extra
noise immunity by connecting a small capacitor from LBI
to GND. Additional hysteresis can be added by connect-
ing a high-value resistor from LBI to LBO .
Figure 7. Typical 3.3V or 5V Linear Regulator Circuit
Applications Information
The MAX882/MAX883/MAX884 are series linear regula-
tors designed primarily for battery-powered systems.
Figure 7 shows a typical application.
Standby Mode vs. OFF Mode
STBY is a comparator input that allows the user to set
the standby-mode threshold voltage, while OFF is a
logic-level input. When in standby mode, the output is
disconnected from the input, but the biasing circuitry
(including the low-battery comparator) is kept alive,
causing the device to draw approximately 7μA.
Standby mode is useful in applications where a low-
battery comparator function is still needed in shutdown.
A logic low at the OFF pin turns off all biasing circuitry,
including the LBI/ LBO comparator, and reduces supply
current to less than 1μA. OFF mode is useful for maxi-
mizing battery life. There is little difference in the time it
takes to exit standby mode or OFF mode.
Output Capacitor Selection
and Regulator Stability
An output filter capacitor is required at the MAX882/
MAX883/MAX884 OUT pin. The minimum output
capacitance required for stability is 2.2μF.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX882ESA/GH9 | 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 |
| MAX882ESA/GH9-T | 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 |
| MAX882ESA+ | 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear Regulator 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 |
| MAX882ESA+T | 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear Regulator 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 |
| MAX882ESA-T | 功能描述:低压差稳压器 - LDO 5/3.3/AdjV 200mA Linear Regulator 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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