参数资料
| 型号： | MAX5085ATT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V/ADJ .2A 6-TDFN |
| 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： | 3.3V，2.54 V ~ 11 V |
| 输入电压： | 6.5 V ~ 65 V |
| 电压 - 压降（标准）： | 0.9V @ 200mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 200mA（最小） |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WDFN 裸露焊盘 |
| 供应商设备封装： | 6-TDFN 裸露焊盘（3x3） |
| 包装： | 带卷 (TR) |
65V, 200mA, Low-Quiescent-Current
Linear Regulators in TDFN
R 1 = R 2 x ? OUT ? 1 ?
Detailed Description
The MAX5084/MAX5085 are high-voltage linear regula-
tors with a 6.5V to 65V input voltage range. The devices
guarantee 200mA output current and are available with
preset output voltages of 3.3V or 5V. Both devices can
be used to provide adjustable outputs from 2.54V to
11V by connecting a resistive divider from OUT to SET
to GND. Thermal shutdown and short-circuit protection
are provided to prevent damage during overtempera-
ture and overcurrent conditions. An output sense pin
(OUT_SENSE) provides for Kelvin sensing of the output
voltage, thereby reducing the error caused by internal
and external resistances. An enable input (EN) allows
the regulators to be turned on/off through a logic-level
voltage. Driving EN high turns on the device, while dri-
ving EN low places the device in a low-power shut-
down mode. In shutdown, the supply current reduces
to 6μA (typ). Both devices operate over the -40°C to
+125°C temperature range and are available in a 3mm
x 3mm, 6-pin TDFN package capable of dissipating
1.905W at T A = +70°C.
Regulator
The regulator accepts an input voltage range from 6.5V
to 65V. The MAX5084/MAX5085 offer fixed-output volt-
ages of 5V and 3.3V, respectively. The output voltage is
also adjustable from 2.54V to 11V by connecting an
external resistive divider network between OUT, SET,
and GND (see R1 and R2 in Figure 2). The MAX5084/
MAX5085 automatically determine the feedback path
depending on the voltage at SET.
Enable Input (EN)
EN is a logic-level enable input, which turns the
MAX5084/MAX5085 on/off. Drive EN high to turn on the
device and drive EN low to place the device in shut-
down. When in shutdown, the MAX5084/MAX5085 typi-
cally draw 6μA of supply current. EN can withstand
voltages up to 65V, allowing EN to be connected to IN
for an always-on operation. EN has an internal 5M Ω
resistor to GND.
Remote Sensing (OUT_SENSE)
OUT_SENSE provides for Kelvin sensing of the fixed
output voltage, thus eliminating errors due to the volt-
age drop in the trace resistance between OUT and the
load. OUT_SENSE is internally connected to OUT
through a 15 Ω resistor (Figure 1), and can be left float-
ing when remote sensing is not required. However, if
accurate output voltage regulation at the load is
required, then connect OUT_SENSE directly to the load.
Dual Mode is a trademark of Maxim Integrated Products, Inc.
Thermal Protection
When the junction temperature exceeds +160°C, an
internal thermal sensor signals the shutdown logic to
turn off the pass transistor and allows the IC to cool.
The thermal sensor turns the pass transistor on again
after the junction temperature cools by 10°C. This
results in a cycled output during continuous thermal
overload conditions. Thermal protection protects the
MAX5084/MAX5085 in the event of fault conditions. For
continuous operation, do not exceed the maximum
junction temperature rating of +150°C.
Output Short-Circuit Current Limit
The MAX5084/MAX5085 feature a 340mA current limit.
The output can be shorted to GND for an indefinite
period of time without damage to the device. During a
short circuit, the power dissipated across the pass tran-
sistor can quickly heat the device. When the die tem-
perature reaches +160°C, the MAX5084/MAX5085 shut
down and automatically restart after the die temperature
cools by 10°C. This results in a pulsed output operation.
Applications Information
Output Voltage Setting
The MAX5084/MAX5085 feature Dual Mode TM opera-
tion: they operate in either a preset output voltage
mode or an adjustable output voltage mode. Connect
SET to GND for preset output voltage operation. In pre-
set mode, internal feedback resistors set the MAX5084’s
internal linear regulator to 5V, and the MAX5085’s inter-
nal linear regulator to 3.3V. In adjustable mode, select
an output from 2.54V to 11V using a resistive divider
(see R1 and R2 in Figure 2) connected from OUT to
SET to GND. In adjustable mode, first select the resis-
tor from SET to GND (R2) in the 1k Ω to 100k Ω range.
The resistor from OUT to SET (R1) is then calculated
by:
? V ?
? V SET ?
where V SET = 1.251V.
Available Output Current Calculation
The MAX5084/MAX5085 provide up to 200mA of con-
tinuous output current. The input voltage extends to
65V. Package power dissipation limits the amount of
output current available for a given input/output volt-
age and ambient temperature. Figure 3 depicts the
maximum power dissipation curve for these devices.
_______________________________________________________________________________________
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| MAX5086_08 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:45V, 250mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay |
| MAX5086AATE | 功能描述:线性稳压器 - 标准 RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
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