SC632

更新时间： 2024-09-18 06:10:15

品牌	Logo	应用领域
商升特 - SEMTECH		稳压器泵
页数	文件大小	规格书
14页	233K
描述
Fixed 5.0V Output Charge Pump Regulator

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SC632 数据手册

SC632

Fixed 5.0V Output

Charge Pump Regulator

POWER MANAGEMENT

Features

Description

Input voltage range — 2.9V to 5.5V

_OUTtolerance — 5.0V ±±3

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

Semtech’s proprietary low-noise charge pump technol-

ogy. Performance is optimized for use in single Li-Ion

battery cell applications. The regulator provides the per-

formance 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.

Continuous output current — 275mA

Peak output current — 500mA

Three charge pump modes — 1x, 1.5x and 2x

Output ripple ≤ ±0mV_PPfor I_OUT≤ 400mA

Short circuit, over-voltage, and over-temperature

protection

Soft-start functionality

Shutdown current — 0.1μA, typical

Ultra thin package — 2 x 2 x 0.6 (mm)

Lead free and Halogen free

Only two 2.2μF bucket capacitors are required to deliver

the full output current. The charge pump provides a low

EMI solution compared to inductive boost regulators.

WEEE and RoHS compliant

Applications

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

2x, 1.5x, and 1x modes. The 2x and 1.5x modes deliver

current to the load in each of two phases. The 1x mode

turns oﬀ the charge pump, delivering current through an

LDO. When active, the charge pump provides low-ripple

operation at 200kHz, which is typically less than ±0mVpp

at the output. The SC6±2 is capable of delivering 275mA

continuous current, with peak current to 500mA. A 22μF

output capacitor is used for decoupling the load and for

smoothing mode transitions. Hysteresis is provided to

prevent chatter between charge pump modes.

Mobile phones

MP± players

USB On-The-Go

Multi-LED backlit LCDs

Compact ﬂash/CF+ products

PMPs

Digital video cameras

Digital still cameras

PDAs

Typical Application Circuit

V_OUT= 5.0V @ 275mA

OUT

C_IN

22μF

C_OUT

V_BAT

22μF

SC632

Chip

enable

C1+

C₁

C1-

2.2μF

C2+

C2-

C₂

2.2μF

GND

Patents Pending

October 7, 2009

12 3 4 5 6 7...14

中文翻译

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