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参数资料
| 型号： | MAX1818EUT25#T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/9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
Applications Information
Capacitor Selection and
Regulator Stability
Capacitors are required at the MAX1818’s input and
output for stable operation over the full temperature
range and with load currents up to 500mA. Connect a
1μF capacitor between IN and ground and a 3.3μF low-
ESR capacitor between OUT and ground. For output
voltages less than 2V, use a 4.7μF low-ESR output
capacitor. The input capacitor (C IN ) lowers the source
impedance of the input supply. Reduce noise and
improve load-transient response, stability, and power-
supply rejection by using larger output capacitors, such
as 10μF.
The output capacitor’s (C OUT ) equivalent series resis-
tance (ESR) affects stability and output noise. Use out-
put capacitors with an ESR of 0.1 Ω or less to ensure
stability and optimum transient response. Surface-
mount ceramic capacitors have very low ESR and are
commonly available in values up to 10μF. Connect C IN
and C OUT as close to the MAX1818 as possible to mini-
mize the impact of PC board trace inductance.
Noise, PSRR, and Transient Response
The MAX1818 load-transient response (see T ypical
Operating Characteristics) shows two components of
the output response: a DC shift from the output imped-
ance due to the load current change, and the transient
response. A typical transient response for a step
change in the load current from 100mA to 500mA is
8mV. Increasing the output capacitor ’s value and
decreasing the ESR attenuates the overshoot.
Input-Output (Dropout) Voltage
A regulator’s minimum input-to-output voltage differen-
tial (dropout voltage) determines the lowest usable sup-
ply voltage. In battery-powered systems, this
determines the useful end-of-life battery voltage.
Because the MAX1818 uses a P-channel MOSFET pass
transistor, its dropout voltage is a function of drain-to-
source on-resistance (R DS(ON) ) multiplied by the load
current (see Typical Operating Characteristics).
V DROPOUT = V IN - V OUT = R DS(ON) × I OUT
The MAX1818 ground current remains below 150μA in
dropout.
The MAX1818 is designed to operate with low dropout
voltages and low quiescent currents in battery-powered
systems while still maintaining good noise, transient
response, and AC rejection. See the Typical Operating
Characteristics for a plot of power-supply rejection ratio
(PSRR) versus frequency. When operating from noisy
sources, improved supply-noise rejection and transient
response can be achieved by increasing the values of
the input and output bypass capacitors and through
passive filtering techniques.
TRANSISTOR COUNT: 845
Chip Information
Selector Guide
Package Information
PART AND
SUFFIX
V OUT
SOT23
TOP
MARK
SOT23
TOP MARK
(RoHS
COMPLIANT)
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages .
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
6 SOT23 U6F-6 21-0058
MAX1818EUT15
1.5V or Adj
AASO
ABZM
6 SOT23#
U6FH-6
MAX1818EUT18
MAX1818EUT20
MAX1818EUT25
MAX1818EUT33
MAX1818EUT50
1.8V or Adj
2.0V or Adj
2.5V or Adj
3.3V or Adj
5.0V or Adj
AANU
AANV
AANF
AANG
AANH
ABZG
ABZJ
ABZK
ABZH
ABZL
8
_______________________________________________________________________________________
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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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