Datasheet > MAX14690

MAX14690

更新时间： 2024-09-30 14:58:03

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亚德诺 - ADI		/
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47页	1099K
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可穿戴设备充电管理方案

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MAX14690 数据手册

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MAX14690

PMIC with Ultra-Low I Voltage Regulators and

Battery Charger for Small Lithium Ion Systems

General Description

Beneﬁts and Features

● Extend System Use Time Between Battery Charging

The MAX14690 is a battery-charge-management solution

ideal for low-power wearable applications. The device

includes a linear battery charger with a smart power

selector and several power-optimized peripherals. The

MAX14690 features two ultra-low-power buck regulators

with a typical quiescent current of 900nA. In addition,

three ultra-low power low-dropout (LDO) linear regulators,

with a typical quiescent current of 600nA are included.

In total, the MAX14690 can provide up to five regulated

voltages, each with an ultra-low quiescent current,

critical to battery life for the unique power profile in 24/7

operation devices, such as those in the wearable market.

• Dual Ultra-Low-I 200mA Buck Regulators

• Output Programmable from 0.8V to 1.8V and

1.5V to 3.3V

• 0.9μA (typ) Quiescent Current

• Automatic Burst or Forced-PWM Modes

• Three Ultra-Low-I 100mA LDOs

• Output Programmable from 0.8V to 3.6V

• 0.6μA (typ) Quiescent Current

• 2.7V to 5.5V Input with Dedicated Pin

● Easy-to-Implement Li+ Battery Charging

• Smart Power Selector

The battery charger features a smart power selector that

allows operation on a dead battery when connected to a

power source. To avoid overloading a power adapter, the

input current to the smart power selector is limited based

• 28V/-5.5V Tolerant Input

• Thermistor Monitor

● Minimize Solution Footprint Through High Integration

• Provides Five Regulated Voltage Rails

• Switch Mode Option on Each LDO

on an I C register setting. If the charger power source

is unable to supply the entire system load, the smart

power control circuit supplements the system load with

current from the battery.

● Optimize System Control

• Monitors Pushbutton for Ultra-Low Power Mode

• Power-On Reset Delay and Voltage Sequencing

• On-Chip Voltage Monitor Multiplexer

The two synchronous, high-efficiency step-down buck

regulators feature a fixed-frequency PWM mode for

tighter regulation and a burst mode for increased

efficiency during light-load operation. The output voltage

Applications

● Wearable Electronics

● Fitness Monitors

● Portable Medical Devices

of these regulators can be programmed through I C with

the default preconfigured.

The three configurable LDOs each have a dedicated

input pin. Each LDO regulator output voltage can be

programmed through I C with the default preconfigured.

Block Diagram

MAX14690

The linear regulators can also be configured to operate

as power switches that may be used to disconnect the

quiescent load of the system peripherals.

LINEAR

Li+ BATTERY CHARGER

WITH POWER SELECTOR

28V INPUT

PROTECTION

POWER

The MAX14690 features a programmable power controller

that allows the device to be configured for applications

that require the device be in a true-off, or always-on,

state. The controller also provides a delayed reset signal

and voltage sequencing.

POWER

BUCK 1

SEQUENCER

BUCK 2

MONITOR

CONTROL

LDO/SWITCH 1

LDO/SWITCH 2

The MAX14690 is available in a 36-bump, 0.4mm pitch,

2.72mm x 2.47mm wafer-level package (WLP).

DATA

SYS

LDO/SWITCH 3

Ordering Information appears at end of data sheet.

19-7480; Rev 13; 1/20

12 3 4 5 6 7...47

中文翻译

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与MAX14690相关器件

型号	品牌	获取价格	描述	数据表
MAX14690AEWX+	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 5 Channel, BICMOS, PBGA36, WLP-36
MAX14690AEWX+T	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690BEWX+	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690BEWX+T	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690CEWX+	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690CEWX+T	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690DEWX+	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690DEWX+T	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690EEWX+*	MAXIM	获取价格	Wearable Charge-Management Solution
MAX14690EEWX+T*	MAXIM	获取价格	Wearable Charge-Management Solution

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