Datasheet > LM8850_15

LM8850_15

更新时间： 2022-02-26 12:31:15

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德州仪器 - TI		/
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描述
High-Performance, Step-Up DC-DC Converter for High-Power Applications in Mobile Devices

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LM8850_15 数据手册

LM8850

www.ti.com

SNVS647C –AUGUST 2010–REVISED MAY 2013

LM8850 High-Performance, Step-Up DC-DC Converter for High-Power Applications in

Mobile Devices

Check for Samples: LM8850

FEATURES

APPLICATIONS

•

6µA typ. Quiescent Current

•

Flash LED

Mobile Phones

WiMAX

•

V_OUT= 3.6V to 5.7V (max V_O= 5.7V)

Operates from a Single Lithium Ion Cell (2.3V

to 5.5V)

USB

•

8 User-selectable Output Voltages via I²C

High-speed 3.4 MHz I²C-compatible Interface

Up to 1.0A Maximum Load Current Capability

4 Levels of Current Limiting

Audio Amplifier

DESCRIPTION

LM8850 is a step-up DC-DC converter optimized for

use with a supercapacitor to protect a battery from

power surges and enable new high power

applications in mobile device architectures. The

device creates an ideal rail from 3.6V to 5.7V

boosting from a single Li-Ion cell with an input voltage

range of 2.3V to 5.5V; Target V_OUTmust be at least

10% higher than V_IN.

An I²C interface controlling multiple output voltage

settings, input current limits, and load currents up to

1A provides superior user flexibility. The LM8850

operates in Auto mode, where the converter is in

PFM mode at light loads and switches to PWM mode

at heavy loads. Hysteretic PFM extends the battery

life by reduction of the quiescent current to 6µA (typ.)

during light load and standby conditions.

Synchronous operation provides true shutdown

isolation and improves its efficiency at medium-to-full

load conditions.

Auto-mode Operation and Forced PWM

2.5 MHz Switching Drequency (typ.)

±2.5% DC Output Voltage Precision

1.0 µH Inductor (2520 Case Size)

4.7 µF Input and Output Capacitors (0603 case

size)

•

PGOOD Signal

True Shutdown Isolation

Output Over-voltage Protection

Internal Active Voltage Balancing for

Supercapacitors

•

DSBGA 9-bump Package

–

(1.58 mm x 1.62 mm x 0.35 mm)(0.5 mm

pitch)

Typical Application Circuit

3.6V

VIN

1 mH

4.7 mF

VOUT

BAL

4.7 mF

LM8850

0.05F to 1.0F

SDA

SCLK

GND

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...20

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与LM8850_15相关器件

型号	品牌	获取价格	描述	数据表
LM8850URE/NOPB	TI	获取价格	High-Performance, Step-Up DC-DC Converter for High-Power Applications in Mobile Devices
LM8850URX/NOPB	TI	获取价格	High-Performance, Step-Up DC-DC Converter for High-Power Applications in Mobile Devices
LM8852S	ETC	获取价格	Microcontroller
LM8854	ETC	获取价格
LM8854G	ETC	获取价格
LM8854S	ETC	获取价格	Microcontroller
LM8899	ETC	获取价格	Microcontroller
LM88CIMM-A	NSC	获取价格	Factory Programmable Dual Remote-Diode Thermostat
LM88CIMM-B	NSC	获取价格	Factory Programmable Dual Remote-Diode Thermostat
LM88CIMMX-A	NSC	获取价格	Factory Programmable Dual Remote-Diode Thermostat

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