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34726

更新时间： 2022-12-26 14:42:31

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		稳压器
页数	文件大小	规格书
19页	1159K
描述
300mA High Efficiency Low Quiescent Current Synchronous Buck Regulator With Z-mode

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34726 数据手册

Document Number: 34726

Rev. 1.0, 5/2008

Freescale Semiconductor

Advance Information

300mA High Efficiency Low

Quiescent Current Synchronous

Buck Regulator With Z-mode

34726

The 34726 is a high efficiency, low quiescent current (I_Q), synchro-

nous buck regulator, implementing Freescale’s innovative Z-mode ar-

chitecture. Freescale’s Z-modearchitecture greatly improves the ripple

performance during light load currents, but still maintains a low quies-

cent current of 65uA, at no load in “Sleepy” Z-mode.

POWER MANAGEMENT IC

The 34726 accepts an input voltage in the range of 2.7 to 5.5V,

making it ideally suited for single cell Li-Ion based applications. Factory

preset output voltages, ranging from 0.8V to 3.3V, reduce the number

of required auxiliary components. The part is able to provide 300mA of

continuous load current across the input and the output voltage ranges.

Bottom View

FC SUFFIX (PB-FREE)

98ASA10787D

8-PIN UDFN

2X2

The 34726 switches at 2.0MHz to allow the use of small, surface

mount inductors and capacitors to save precious board space.

The 34726 is available in the small, space saving, and low cost, 2x2

UDFN-8 packages. The part is guaranteed for operation over the -25°C

to 85°C temperature range.

ORDERING INFORMATION

Temperature

Device

Package

Features

Range (T )

• 94% peak efficiency

• 2.0MHz switching frequency

• 2.7V to 5.5V input voltage range

• Automatic transition to energy saving light load Z-mode (low ripple)

• Fixed output voltage options from 0.8 to 3.3V

• 65µA quiescent current during sleepy Z-mode

• 300mA maximum continuous output current

• Internal 2.0ms soft start

MC34726AFC/R2

MC34726BFC/R2

MC34726CFC/R2

-25°C to 85°C

8-UDFN

• Thermal and over-current protection

• 0.1µA quiescent current in shutdown (disabled)

• Ultra thin 2x2 UDFN package

• Pb-free packaging designated by suffix code FC

34726

2.7V ~ 5.5V

0.8 - 3.3V *

300mA

VIN

C_IN

C_OUT

OFF

*Programmable

See table 1

GND

Figure 1. 34726 Typical Operating Circuit

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...19

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