Datasheet > MIC23099YFT

MIC23099YFT

更新时间： 2024-11-15 01:17:55

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
26页	2160K
描述
Single AA/AAA Cell Step-Up/Step-Down Regulators

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MIC23099YFT 数据手册

MIC23099

Single AA/AAA Cell Step-Up/Step-Down

Regulators with Battery Monitoring

General Description

Features

The MIC23099 is a high-efficiency, low-noise, dual-output,

integrated power-management solution for single-cell

alkaline or NiMH battery applications. The synchronous

boost output voltage (V_OUT1) is enabled first and is

powered from the battery. Next the synchronous buck

output (V_OUT2), which is powered from the boost output

voltage, is enabled. This configuration allows V_OUT2to be

independent of battery voltage, thereby allowing the buck

output voltage to be higher or lower than the battery

voltage.

• V_INrange from 0.85V to 1.6V

• V_OUT1(step-up) adjustable from 1.8V to 3.3V

• V_OUT2(step-down) adjustable from 1.0V to V_OUT2

• V_OUT1/400mW and V_OUT2/30mA from a single cell

• Minimizes switching noise in the audio band

• Step-up regulator with output disconnect in shutdown

• V_OUT1, above 90% efficiency for 5mA to 200mA

• Anti-ringing control circuit to minimize EMI

• Turn-on inrush current limiting and soft-start

• Automatic output discharge

To minimize switching artifacts in the audio band, both the

converters are design to operate with a minimum switching

frequency of 80kHz for the buck and 100kHz for the boost.

The high current boost has a maximum switching

frequency of 1MHz, minimizing the solution footprint.

• Low-battery indicator

• Power Good (PG) output

• Low output ripple < 10mV

The MIC23099 incorporates both battery-management

functions and fault protection. The low-battery level is

indicated by an external LED connected to the LED pin. In

addition, a supervisory circuit monitors each output and

asserts a power-good (PG) signal when the sequencing is

done or de-asserted when a fault condition occurs.

• Short-circuit and thermal protection

• 14-pin 2.5mm × 2.5mm × 0.55mm thin QFN (TQFN)

package

• −40°C to +125°C junction temperature range

Applications

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

• Audio headsets

• Portable applications

Typical Application

Efficiency (V_IN= 1.2V)

vs. Output Current

100

BOOST

V_OUT1= 1.8V

BUCK

V_OUT2= 1.0V

LED Pin = OPEN

L1 = IFSC1515AHER6R8M01M

L2 = SPM4012T-4R7M

0.001

0.01

0.1

0.2

OUTPUT CURRENT (A)

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

Revision 1.2

May 27, 2014

12 3 4 5 6 7...26

中文翻译

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