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MAX17085BETL+

更新时间： 2024-01-24 04:57:11

品牌	Logo	应用领域
美信 - MAXIM		稳压器开关式稳压器或控制器电源电路开关式控制器输出元件信息通信管理
页数	文件大小	规格书
37页	3202K
描述
Integrated Charger, Dual Main Step-Down Controllers, and Dual LDO Regulators

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技术参数
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MAX17085BETL+ 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	HVQCCN, LCC40,.2SQ,16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.31.00.01	Factory Lead Time：	6 weeks
风险等级：	2.32	其他特性：	ALSO HAS 5V OUTPUT; ALSO OPERATES AS LDO REGULATOR
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	CURRENT-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	24 V
最小输入电压：	4.5 V	标称输入电压：	19 V
JESD-30 代码：	S-XQCC-N40	JESD-609代码：	e3
长度：	5 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	40
最高工作温度：	85 °C	最低工作温度：	-40 °C
标称输出电压：	3.3 V	封装主体材料：	UNSPECIFIED
封装代码：	HVQCCN	封装等效代码：	LCC40,.2SQ,16
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：	260	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	0.8 mm
子类别：	Power Management Circuits	最大供电电流 (Isup)：	1.5 mA
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
切换器配置：	BUCK	最大切换频率：	800 kHz
技术：	BICMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	NO LEAD
端子节距：	0.4 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	5 mm
Base Number Matches：	1

MAX17085BETL+ 数据手册

19-5135; Rev 0; 1/10

Integrated Charger, Dual Main Step-Down

Controllers, and Dual LDO Regulators

General Description

Features

S All-in-One Charger Plus Dual Main Step-Down

The MAX17085B is an all-in-one notebook power solution

integrating a multichemistry battery charger, dual fixed-

output Quick-PWMK step-down controllers, and dual

keep-alive linear regulators:

Controllers

S 5V/100mA and 3.3V/50mA LDO Regulators

S Main

Charger: The high-frequency (~1.4MHz) multichem-

istry battery charger uses a current-mode, fixed

inductor current ripple architecture that significantly

reduces component size and cost. Low-offset sense

amplifiers allow the use of low-value sense resistors

for charging and input current limit.

Dual Quick-PWM with Fast Transient Response

and Extended On-Time

300kHz to 800kHz Switching Frequency

Fixed 5V and 3.3V SMPS Outputs

Low-Noise Ultrasonic Mode

Autoretry Fault Protection

The charger uses n-channel switching MOSFETs.

Adjustable charge current, charge voltage, and cell

selection allow for flexible use with different battery

packs. Charge current is set by an analog control input,

or a PWM input. High-accuracy current-sense ampli-

fiers provide fast cycle-by-cycle current-mode control to

protect against short circuits to the battery and respond

quickly to system load transients. Additionally, the char-

ger provides a high-accuracy analog output that is pro-

portional to the adapter current.

S Charger

High Switching Frequency (1.4MHz)

Selectable 2-, 3-, and 4-Cell Battery Voltage

Automatic Selection of System Power Source

Internal Charge-Pump for Adapter n-Channel

MOSFETs Drive

Q0.4% Accurate Charge Voltage

Q2.5% Accurate Input Current Limiting

Q3% Accurate Charge Current

S Monitor Outputs for

An integrated charge pump controls an n-channel

adapter selector switch. The charge pump remains

active even when the charger is off. When the adapter

is absent, a p-channel MOSFET selects the battery.

AC Adapter Current (Q2% Accuracy)

Battery Discharge Current (Q2% Accuracy)

AC Adapter OK

S Analog/PWM (100Hz to 500kHz) Adjustable

Main SMPS: The dual Quick-PWM step-down con-

trollers with synchronous rectification generate

the 5V and 3.3V main power in a notebook. Low-

side MOSFET sensing provides a simple low-cost,

highly efficient valley current-limit protection. The

MAX17085B also includes output undervoltage, out-

put overvoltage, and thermal-fault protection.

Charge Current Setting

S AC Adapter Overvoltage and Overcurrent

Protection

Applications

Notebook Computers

PDAs and Mobile Communicators

5V and 3.3V Supplies

Separate enable inputs for each SMPS and a com-

bined open-drain power-good output allow flex-

ible power sequencing. Voltage soft-start reduces

inrush current, while passive shutdown discharges

the output through an internal switch. Fast transient

response, with an extended on-time feature reduces

output capacitance requirements. Selectable pulse-

skipping mode and ultrasonic mode improve light-

load efficiency. Ultrasonic mode operation maintains

a minimum switching frequency at light loads, mini-

mizing audible noise effects.

2-to-4, Li+-Cell, Battery-Powered Devices

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX17085BETL+

-40°C to +85°C

40 TQFN-EP*

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Dual LDO Regulators: An internal 5V/100mA LDO5 with

switchover can be used to either generate the 5V bias

needed for power-up or other lower power “always-on”

suspend supplies. Another 3.3V/50mA LDO3 provides

“always-on” power to a system microcontroller.

Pin Configuration appears at end of data sheet.

Quick-PWM is a trademark of Maxim Integrated Products, Inc.

_______________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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