Datasheet > MAX38641AENT+

MAX38641AENT+

更新时间： 2024-02-18 15:23:48

品牌	Logo	应用领域
美信 - MAXIM		开关
页数	文件大小	规格书
15页	807K
描述
Switching Regulator,

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

MAX38641AENT+ 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	,	Reach Compliance Code：	compliant
风险等级：	2.32	Is Samacsys：	N
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	峰值回流温度（摄氏度）：	NOT SPECIFIED
处于峰值回流温度下的最长时间：	NOT SPECIFIED	Base Number Matches：	1

MAX38641AENT+ 数据手册

MAX38640/1/2/3/A/B

Tiny 1.8V - 5.5V Input, 330nA I , 700mA

nanoPower Buck Converter

Applications Information

Inductor Selection

The inductor value for MAX3864x affects the ripple current, the transition point from low power mode (LPM) to ultra-

low-power mode (ULPM), and the overall efficiency performance. Based on the peak current limit required for different

applications, it is recommended to select an inductor value based on Table 3.

Table 3. Inductor Selection

PEAK CURRENT, PART NUMBER

1.0A Peak Current, MAX38643

INDUCTANCE RANGE (µH)

1.0–1.5

2.2

500mA Peak Current, MAX38641/MAX38642

250mA Peak Current, MAX38640

2.2–4.7

Input Capacitor

The input capacitor (C ) reduces the peak current drawn from battery or input power source and reduces the

switching noise in the IC. The impedance of C at the switching frequency should be very low. Ceramic capacitors are

recommended with their small size and low ESR. For most applications, use 10µF ceramic capacitor with X5R or X7R

temperature characteristics.

Output Capacitor

The output capacitor (C

) is required to keep the output voltage ripple small and to ensure loop stability. C

must

OUT

have low impedance at the switching frequency. Ceramic capacitors are recommended due to their small size and low

ESR. Make sure the capacitor does not degrade its capacitance significantly over temperature and DC bias. Capacitors

with X5R or X7R temperature characteristics typically perform well. A 22µF ceramic capacitor is recommended for most

applications.

Enabling Device

The device has a dedicated EN pin. This pin can be driven by a digital signal. It is recommended that the digital signal

enables the device after V crosses the UVLO threshold. In applications where EN is tied to IN, the device is designed

to be powered by fast V slew rates. If V slew rates are slower than 5V/ms, users must delay enabling the device after

crosses the UVLO threshold. This can be done using a simple RC circuit, as shown in Figure 1.

BAT54

R_EN

C_EN

Figure 1. RC Circuit at EN

www.maximintegrated.com

Maxim Integrated | 13

1...10 11 121314 15

下载PDF

与MAX38641AENT+相关器件

型号	品牌	描述	获取价格	数据表
MAX38641BELT+	MAXIM	Switching Regulator,	获取价格
MAX38641BENT+	MAXIM	Switching Regulator,	获取价格
MAX38642	ADI	微小尺寸、1.8V–5.5V输入、330nA IQ、700mA nanoPower降压型转	获取价格
MAX38642AENT+	MAXIM	Switching Regulator,	获取价格
MAX38642BELT+	MAXIM	Switching Regulator,	获取价格
MAX38643	ADI	微小尺寸、1.8V–5.5V输入、330nA IQ、700mA nanoPower降压型转	获取价格