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参数资料
| 型号： | MAX1818EUT25#T |
| 厂商： | Maxim Integrated |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.5V/ADJ .5A SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 2.5V，1.25 V ~ 5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.21V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
500mA Low-Dropout
Linear Regulator in SOT23
Typical Operating Characteristics (continued)
(V IN = (V OUT + 500mV) or +2.5V, whichever is greater; SHDN = IN, C IN = 1μF, C OUT = 3.3μF, T A = +25°C, unless otherwise noted.)
SHORT-CIRCUIT CURRENT LIMIT
SHUTDOWN WAVEFORM
MAX1818 toc12
1.11
vs. SUPPLY VOLTAGE
1.10
V OUT(NOM) = +2V
SHUTDOWN
VOLTAGE
V OUT
POK
0
0
2V/div
0
1.09
1.08
1.07
1.06
1.05
1.04
1.03
1.02
1.01
1.00
200 μ s/div
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
Pin Description
PIN
1
2
3
4
5
6
NAME
IN
POK
SHDN
GND
SET
OUT
FUNCTION
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1 μ F capacitor to GND (see
Capacitor Selection and Regulator Stability ).
Open-Drain POK Output. POK remains low while the output voltage (V OUT ) is below the POK threshold.
Connect a 100k Ω pull-up resistor from POK to OUT to obtain an output voltage.
Active-Low Shutdown Input. A logic low reduces supply current below 15 μ A. In shutdown, the POK output is
low, and OUT is high impedance. Connect to IN for normal operation.
Ground
Voltage-Setting Input. Connect to GND for preset output. Connect to a resistive voltage-divider between
OUT and GND to set the output voltage between 1.25V and 5.0V.
Regulator Output. Sources up to 500mA. Bypass with a 3.3 μ F low-ESR capacitor to GND. Use a 4.7 μ F
capacitor for output voltages below 2V.
Detailed Description
The MAX1818 is a low-dropout, low-quiescent-current
linear regulator designed primarily for battery-powered
applications. The device supplies loads up to 500mA
and is available with preset output voltages. As illustrat-
ed in Figure 1, the MAX1818 consists of a 1.25V refer-
ence, error amplifier, P-channel pass transistor, and
internal feedback voltage-divider.
The 1.25V reference is connected to the error amplifier,
which compares this reference with the feedback volt-
age and amplifies the difference. If the feedback volt-
age is lower than the reference voltage, the
pass-transistor gate is pulled lower, which allows more
current to pass to the output and increases the output
voltage. If the feedback voltage is too high, the pass-
transistor gate is pulled up, allowing less current to
pass to the output.
The output voltage is fed back through either an inter-
nal resistive divider connected to OUT or an external
resistor network connected to SET. The Dual Mode
comparator examines V SET and selects the feedback
path. If V SET is below 50mV, the internal feedback path
is used and the output is regulated to the factory-preset
voltage.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1818EUT33 | 制造商:Maxim Integrated Products 功能描述:100MA LOW DROPOUT LINEAR REGULATOR IN HIGH PO - Bulk |
| MAX1818EUT33#G16 | 制造商:Maxim Integrated Products 功能描述:LDO REG 1.25V TO 5V/3.3V 0.5A 6PIN SOT-23 - Bulk |
| MAX1818EUT33#TG16 | 功能描述:低压差稳压器 - LDO 500mA 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 |
| MAX1818EUT33+ | 制造商:Maxim Integrated Products 功能描述:500MA, LOW-DROPOUT LINEAR REGULATOR IN SOT23 - Bulk |
| MAX1818EUT33+T | 功能描述:低压差稳压器 - LDO 500mA 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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