SC632A

更新时间： 2024-11-25 07:20:31

品牌	Logo	应用领域
商升特 - SEMTECH		稳压器泵
页数	文件大小	规格书
15页	490K
描述
1MHz Fixed 5.0V Output Charge Pump Regulator

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中文翻译

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SC632A 数据手册

SC632A

1MHz Fixed 5.0V Output

Charge Pump Regulator

POWER MANAGEMENT

Features

Description

The SC6±2A is a high-current voltage regulator using

Semtech’s proprietary low-noise charge pump technol-

ogy. The charge pump provides a low EMI solution

compared to inductive boost regulators. Performance is

optimized for use in single Li-Ion battery cell applications.

The regulator provides the performance of a linear, low

drop-out (LDO) voltage regulator when the input is greater

than 5.0V. Unlike an LDO, drop-out is avoided when the

input is less than 5.0V. Instead, a charge pump is activated

to provide voltage boost and the head-room needed for

voltage regulation.



Input voltage range — 2.95V to 5.5V

V_OUTtolerance — 5.0V ±±3

Continuous output current — 275mA

Peak output current — 400mA

Three charge pump modes — ꢀx, ꢀ.5x and 2x

Output ripple voltage — 50mV_PP, typical

Short circuit, over-voltage, and over-temperature

protection



Soft-start functionality

Shutdown current — 0.ꢀµA, typical

Ultra thin package — 2 x 2 x 0.6 (mm)

Lead-free and halogen-free

The SC6±2A’s charge pump has three modes of operation:

2x, ꢀ.5x, and ꢀx modes. 2x and ꢀ.5x are voltage boost

modes that deliver current to the load in each of two

phases. The ꢀx mode turns oﬀ the charge pump, deliver-

ing current through an LDO. Hysteresis is provided to

prevent chatter between charge pump modes. When

active, the charge pump provides low-ripple operation at

ꢀMHz. Typically the output ripple is 50mVpp at the

maximum continuous current rating of 275mA.

WEEE and RoHS compliant

Applications



Mobile phones

Tablets

USB On-The-Go

Multi-LED backlit LCDs

Compact ﬂash/CF+ products

Digital video cameras

DVI/HDMI ports

Wi-Fi base stations

Modems

A small 2.2µF capacitor is recommended for all four capaci-

tors. The full rated output current is provided when 2.2µF

is used for both bucket capacitors. At the output, a 2.2µF

capacitor decouples the load and provides smoothing for

mode transitions, while another 2.2µF is used to decouple

the input.

Set-top boxes

Typical Application Circuit

V_OUT= 5.0V @ 275mA

OUT

C_IN

2.2µF

C_OUT

V_BAT

2.2µF

SC632A

Chip

enable

C1+

C1-

C₁

2.2µF

C2+

C2-

C₂

2.2µF

GND

US Patent: 7,808,220

ꢀ

Revision ꢀ.0

12 3 4 5 6 7...15

中文翻译

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