Datasheet > MAX20345

MAX20345

更新时间： 2023-12-20 18:45:04

品牌	Logo	应用领域
亚德诺 - ADI		集成电源管理电路调节器
页数	文件大小	规格书
127页	2730K
描述
具有超低IQ电压调节器、升/降压调节器(用于光学检测)和充电器(用于小型锂离子系统)的PMIC

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PMIC with Ultra-Low I Voltage Regulators,

Buck-Boost for Optical Sensing and

MAX20345

Charger for Small Lithium Ion Systems

General Description

Beneﬁts and Features

The MAX20345 is a power management solution featur-

● Extend Battery-Use Time Between Charging

• 3 x Low Buck Regulators ( = 0.9µA typ)

ing ultra-low I voltage regulators, ideal for low-power

wearable applications. The device includes a linear battery

charger with a smart power selector and several power-

optimized peripherals. The device features three buck

regulators, three low-dropout (LDO) linear regulators, and

a Buck-Boost regulator, providing up to seven regulated

voltages, each with an ultra-low quiescent current. Two

load switches allow disconnecting system peripherals to

minimize the total quiescent load of the system. MAX20345

allows system designers to minimize power consumption

and extend battery life in 24/7 operation devices, such as

those in the wearable market.

• 220mA Output Current

• Noise Mitigation by Flexible Adjustment of

Switching Frequency

• Buck1: 0.700V to 1.330V Output Voltage in

10mV Steps

• Buck2: 0.700V to 2.275V Output Voltage in

25mV Steps

• Buck3: 0.700V to 3.850V Output Voltage in

50mV Steps

• LDO1 (

I = 0.55µA typ)

• 100mA Output

• 2.7V to 5.5V Input Voltage Range

• 0.8V to 3.6V Output Voltage in 100mV Steps

The three synchronous, high-efficiency buck regulators

use a pulse frequency modulated (PFM) control scheme

for increased efficiency during light-load operation. The

output voltage of these regulators can be programmed

• LDO2 (

I = 1µA typ)

• 100mA Output

through I C down to voltages as low as 0.7V. Additionally,

• 1.71V to 5.50V Input Voltage Range

• 0.9V to 4.0V Output Voltage in 100mV Steps

the buck regulators support dynamic voltage scaling

(DVS) allowing the system designer to further improve

system power consumption when using devices that can

take advantage of DVS.

• LDO3 (

I = 1µA typ)

• 50mA Output

• 1.00V to 2.00V Input Voltage Range

• 0.50V to 1.95V Output Voltage in 25mV Steps

Each of the three LDO regulators output voltage can be

programmed through I C. For additional flexibility, each

LDO can be configured as a load switch that can be used

to disconnect the quiescent load of the system peripherals.

• 2 x Load Switches

• 0.65V to 5.50V Input Voltage Range

The integrated Buck-Boost converter provides a conve-

nient way to power system peripherals that require volt-

ages higher and/or lower than the battery voltage, and

is optimized for optical sensing systems such as optical

• 1Ω R

at SYS = 3.0V

Buck-Boost Regulator (I = 2µA typ)

• Low

• 1.5W Output Capability

• 2.6V to 5.5V Output Voltage in 50mV Steps

heart rate (OHR)/PPG and SpO measurements. The

● Easy to Implement Li+ Battery Charging

• Linear Li-Ion Battery Charger

• 5mA to 500mA Charge current

• +28V / -5.5V Tolerant Input

output noise of the Buck-Boost is minimized to provide

the least impact possible on sensitive measurements in

such systems. The addition of DVS offers further power

savings during favorable measurement conditions.

• Step Charging (See the Step Charging Section)

• Thermistor Monitor

• Smart Power Selector

The MAX20345 also features a programmable power con-

troller that allows the device to be configured for applications

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

The controller provides a delayed reset signal and voltage

sequencing. The MAX20345 is available in a 56-bump,

0.4mm pitch, 3.37mm x 3.05mm wafer-level package (WLP).

● Optimize System Control

• Power On/ Reset Controller

• Push-Button Monitor

• Factory Shipping Mode

• System Interface

Applications

● Wearable Devices

● IoT

• Monitor Multiplexer with Programmable Divider to

Monitor System Voltages and Charging Current

Ordering Information appears at end of data sheet.

19-100366; Rev 11; 9/23

One Analog Way, Wilmington, MA 01887 U.S.A.

Tel: 781.329.4700

12 3 4 5 6 7...127

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与MAX20345相关器件

型号	品牌	获取价格	描述	数据表
MAX2034CTM	MAXIM	获取价格	Quad-Channel, Ultra-Low-Noise Amplifier with Digitally Programmable Input Impedance
MAX2034CTM+	MAXIM	获取价格	Quad-Channel, Ultra-Low-Noise Amplifier with Digitally Programmable Input Impedance
MAX2034CTM+T	MAXIM	获取价格	Quad-Channel, Ultra-Low-Noise Amplifier with Digitally Programmable Input Impedance
MAX2034CTM-T	MAXIM	获取价格	Quad-Channel, Ultra-Low-Noise Amplifier with Digitally Programmable Input Impedance
MAX2035	MAXIM	获取价格	Ultrasound Variable-Gain Amplifier
MAX2035_09	MAXIM	获取价格	Ultrasound Variable-Gain Amplifier
MAX20353	MAXIM	获取价格	PMIC with Ultra-Low Iq Regulators, Charger, Fuel Gauge, and Haptic Driver for Small Li Sys
MAX20353	ADI	获取价格	PMIC with Ultra-Low IQ Regulators, Charger, Fuel Gauge, and Haptic Driver for Small Li+ Sy
MAX20353AEWN+	MAXIM	获取价格	PMIC with Ultra-Low Iq Regulators, Charger, Fuel Gauge, and Haptic Driver for Small Li Sys
MAX20353AEWN+T	MAXIM	获取价格	PMIC with Ultra-Low Iq Regulators, Charger, Fuel Gauge, and Haptic Driver for Small Li Sys

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