Datasheet > MAX40200

MAX40200

更新时间： 2024-01-08 19:05:35

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
14页	566K
描述
Ultra-Tiny Micropower, 1A Ideal Diode

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技术参数
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MAX40200 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	LSSOP,	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	Factory Lead Time：	12 weeks
风险等级：	5.58	Samacsys Confidence：	3
Samacsys Status：	Released	Samacsys PartID：	790304
Samacsys Pin Count：	5	Samacsys Part Category：	Integrated Circuit
Samacsys Package Category：	SOT23 (5-Pin)	Samacsys Footprint Name：	Maxim 21-0057
Samacsys Released Date：	2018-09-10 16:04:27	Is Samacsys：	N
模拟集成电路 - 其他类型：	ANALOG CIRCUIT	JESD-30 代码：	R-PDSO-G5
长度：	2.9 mm	功能数量：	1
端子数量：	5	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	LSSOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	NOT SPECIFIED
座面最大高度：	1.45 mm	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	1.5 V	标称供电电压 (Vsup)：	3.3 V
表面贴装：	YES	技术：	BICMOS
温度等级：	AUTOMOTIVE	端子形式：	GULL WING
端子节距：	0.95 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	1.625 mm
Base Number Matches：	1

MAX40200 数据手册

MAX40200

Ultra-Tiny Micropower, 1A Ideal Diode

with Ultra-Low Voltage Drop

This control circuitry consumes 7µA typical current and

this limits the rate at which the internal MOSFET can be

turned on/off.

Detailed Description

The MAX40200 mimics a near-ideal diode. The device

blocks reverse-voltages and passes current when forward-

biased just as a normal diode. The improvements are that

instead of a cut-in voltage around 500mV and a logarithmic

voltage-current transfer curve, the MAX40200 has a near

constant voltage drop independent of the magnitude of

the forward current flowing through it. This voltage drop is

around 45mV at 500mA of forward or load current.

To ensure the control loop remains stable for all output

current levels, there should always be a minimum of

0.33µF connected to the OUT output and likewise, a minimum

of 0.33µF on the V

input.

These capacitors also improve the surge capability of

power supply. In general for higher Output Capacitive

Loads [e.g., C

= 10µF], then C should be kept to

The constant forward voltage drop significantly helps with

supply regulation; a normal diode typically drops an additional

60mV for every 10 - x change in current through it.

OUT

C /10 (µF) for optimum transient response.

OUT

Applications Information

Similar to a normal diode, the MAX40200 also becomes

resistive as the forward current exceeds the specified

limit. Unlike a normal diode, should the MAX40200

exceed the specified temperature, it will turn off in order

to protect itself and the circuitry connected to it. Like a

normal diode MAX40200 will turn-off when it is reverse

biased. The turn-on and turn-off times for Enable and dis-

able response are similar to those of forward and reverse

bias conditions.

The simplest application would be as shown in Figure 1,

where the battery has to be disconnected from the load

when the wall-supply is connected. Often, the wall-supply

can handle the additional losses of a normal diode, so it

would use a regular diode to prevent battery power from

flowing back into it.

The battery, on the other hand, benefits significantly by

only losing 30mV when powering the load, thus increasing

the battery life between charging cycles.

MAX40200 has an enable function feature. Unlike a normal

diode the device can be turned off when not required.

When turned off, it blocks voltages on either side to

a maximum of 6V above ground. This feature allows

MAX40200 to be used, to switch supply sources, or to

control which sub-systems are to be powered up.

For systems that require more than the 500mA that the

MAX40200 is specified for, it may be convenient to split

the load up into various sections that could also benefit

from the individual power enabling that the MAX40200’s

Enable pins offer.

It should be noted, however, that, unlike normal diodes,

this “ideal diode” is not suited to rectifying AC. In applications

where the supply is inductively coupled, conventional

diodes should be used for the rectification part of the

circuitry. MAX40200 is designed to be used in applications

to switch between different DC sources.

This also suggests that any integrated circuit without built-

in power-down capability can have it added by powering it

through a MAX40200.

This allows many parts to be used in portable and other

power-sensitive products.

Principle of Operation

The MAX40200 features an internal pMOSFET to pass

the current from the V

input to the OUT output. The

internal MOSFET is controlled by circuitry that:

1) Creates the 18mV constant forward drop when the

MAX40200 is forward-biased

2) Turns the MOSFET off when the part is reverse

biased

3) If the enable pin is pulled low

4) If the part’s temperature exceeds the speciﬁed level.

Maxim Integrated

│ 9

www.maximintegrated.com

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与MAX40200相关器件

型号	品牌	描述	获取价格	数据表
MAX40200_V01	MAXIM	Ultra-Tiny Micropower, 1A Ideal Diode with Ultra-Low Voltage Drop	获取价格
MAX40200ANS+	MAXIM	Analog Circuit,	获取价格
MAX40200AUK+	MAXIM	Analog Circuit,	获取价格
MAX40200AUK+*	MAXIM	Ultra-Tiny Micropower, 1A Ideal Diode	获取价格
MAX40200AUK+T	MAXIM	暂无描述	获取价格
MAX40201	ADI	双通道、0V至76V电流检测放大器	获取价格
MAX40201FAUA+T	MAXIM	Operational Amplifier,	获取价格
MAX40203	ADI	超小尺寸、Nanopower、1A理想二极管，具有超低压降	获取价格
MAX40203AUK+T	MAXIM	Analog Circuit,	获取价格
MAX40204	ADI	36V, Pin-Programmable Gain, Bidirectional CSA	获取价格

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