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参数资料
| 型号： | MAX1836 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | 数字信号处理 |
| 英文描述： | Replaced by TMS320BC52 : Digital Signal Processors 100-LQFP |
| 中文描述： | 24V内置开关、100%占空比、降压型转换器 |
| 文件页数： | 1/13页 |
| 文件大小： | 394K |
| 代理商： | MAX1836 |
General Description
The MAX1836/MAX1837 high-efficiency step-down
converters provide a preset 3.3V or 5V output voltage
from supply voltages as high as 24V. Using external
feedback resistors, the output voltage may be adjusted
from 1.25V to V
IN
. An internal current-limited switching
MOSFET delivers load currents up to 125mA
(MAX1836) or 250mA (MAX1837).
The unique current-limited control scheme, operating
with duty cycles up to 100%, minimizes the dropout
voltage (120mV at 100mA). Additionally, this control
scheme reduces supply current under light loads to
12μA. High switching frequencies allow the use of tiny
surface-mount inductors and output capacitors.
The MAX1836/MAX1837 step-down converters with
internal switching MOSFETs are available in a 6-pin
SOT23 package, making them ideal for low-cost, low-
power, space-sensitive applications. For increased out-
put drive capability, use the MAX1776 step-down
converter that uses an internal 24V switch to deliver up
to 500mA. For even higher currents, use the MAX1626/
MAX1627 step-down controllers that drive an external
P-channel MOSFET to deliver up to 20W.
________________________Applications
9V Battery Systems
Notebook Computers
Distributed Power Systems
Backup Supplies
4mA to 20mA Loop Power Supplies
Industrial Control Supplies
Hand-Held Devices
____________________________Features
o
4.5V to 24V Input Voltage Range
o
Preset 3.3V or 5V Output
o
Adjustable Output from 1.25V to V
IN
o
Output Currents Up to 125mA (MAX1836) or
250mA (MAX1837)
o
Internal P-Channel MOSFET
o
Efficiency Over 90%
o
12μA Quiescent Current
o
3μA Shutdown Current
o
100% Maximum Duty Cycle for Low Dropout
o
Current-Limiting and Overtemperature Protection
o
Small 6-Pin SOT23 Package
M
24V Internal Switch, 100% Duty Cycle,
Step-Down Converters
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
19-1919; Rev 1; 01/02
PART
PRESET OUTPUT
VOLTAGE (V)
LOAD
CURRENT (mA)
MAX1836EUT50
MAX1836EUT33
MAX1837EUT50
MAX1837EUT33
5
125
125
250
250
3.3
5
3.3
Selector Guide
MAX1836
MAX1837
IN
GND
LX
SHDN
FB
OUT
NOTE:
HIGH-CURRENT PATHS SHOWN WITH BOLD LINES.
OUTPUT
3.3V OR 5V
INPUT
4.5V TO 24V
Typical Operating Circuit
GND
LX
IN
1
6
OUT
5
SHDN
FB
MAX1836
MAX1837
SOT23
TOP VIEW
2
3
4
Pin Configuration
Note:
The MAX1836/MAX1837 require special solder tempera-
ture profile described in the Absolute Maximum Ratings.
PART
TEMP RANGE
PIN-
PA C K A G E
TOP
M ARK
AANW
AANY
AANX
AANZ
MAX1836
EUT50-T
MAX1836EUT33-T
MAX1837
EUT50-T
MAX1837EUT33-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
Ordering Information
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1837EUT50 | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| MAX1837EUT50-T | 24V Internal Switch, 100% Duty Cycle, Step-Down Converters |
| MAX1836EUT33 | COIL 330UH 240MA CHOKE SMD |
| MAX1836EUT50 | COIL 39UH 650MA CHOKE SMD |
| MAX1836EUT50-T | COIL 390UH 210MA CHOKE SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1836ETT33+ | 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP DOWN 6TDFN EP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX1836ETT33+T | 功能描述:直流/直流开关转换器 24V 100% Duty Cycle RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1836ETT50+ | 制造商:Maxim Integrated Products 功能描述:24V INTERNAL SWITCH, 100% DUTY CYCLE, STEP-DOWN CONVERTERS - Rail/Tube |
| MAX1836ETT50+T | 功能描述:直流/直流开关转换器 24V 100% Duty Cycle RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1836EUT+ | 制造商:Maxim Integrated Products 功能描述:24V INTERNAL SWITCH, 100% DUTY CYCLE, STEP-DOWN CONVERTER - Rail/Tube |
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