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LM26480SQ-BF

更新时间： 2024-11-23 05:42:03

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
30页	2433K
描述
Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators

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LM26480SQ-BF 数据手册

March 29, 2010

LM26480

Externally Programmable Dual High-Current Step-Down

DC/DC and Dual Linear Regulators

Linear Regulators (LDO)

General Description

V_OUTof 1.0V–3.5V

■

The LM26480 is a multi-functional Power Management Unit,

±3% FB voltage accuracy

optimized for low-power digital applications. This device inte-

300 mA output current

grates two highly efficient 1.5A step-down DC/DC converters

and two 300 mA linear regulators. The LM26480 is offered in

a tiny 4 x 4 x 0.8mm LLP-24 pin package.

25 mV (typ) dropout

Features

Key Specifications

Compatible with advanced applications processors and

■

FPGAs

Step-Down DC/DC Converter (Buck)

2 LDOs for powering Internal processor functions and I/Os

■

1.5A output current

■

Precision internal reference

V_OUTfrom:

Thermal overload protection

Buck1 : 0.8V–2.0V @ 1.5A

Buck2 : 1.0V–3.3V @ 1.5A

—

Current overload protection

24-lead 4 × 4 × 0.8mm LLP package

Up to 96% efficiency

■

External Power-On-Reset function for Buck1 and Buck2

±3% FB voltage accuracy

Undervoltage lock-out detector to monitor input supply

voltage

2 MHz PWM switching frequency

PWM - PFM automatic mode change under low loads

Automatic soft start

Applications

Core digital power

■

Applications processors

Peripheral I/O power

Typical Application Circuit

30040401

300404

www.national.com

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