Datasheet > SC633

SC633

更新时间： 2024-11-25 12:26:03

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	514K
描述
Fixed 5.3V Output Charge Pump Regulator

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中文翻译

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SC633 数据手册

SC633

Fixed 5.3V Output

Charge Pump Regulator

POWER MANAGEMENT

Features

Description



Input voltage range — 2.9V to 5.5V

V_OUTtolerance — 5.3V 3ꢁ

The SC633 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 5.3V. Unlike an LDO, drop-

out is avoided when the input is less than 5.3V. Instead, a

charge pump is activated to provide voltage boost and

the head-room needed for voltage regulation.

Continuous output current — 275mA, V_IN=3V

Peak output current — 400mA

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

Output ripple ≤ 40mV_PPfor I_OUT≤ 400mA

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

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 SC633’s charge pump has three modes of operation:

2x, ꢀ.5x, and ꢀx modes. The 2x and ꢀ.5x modes deliver

current to the load in each of two phases. The ꢀx 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 30mVpp

at the output. The SC633 is capable of delivering 275mA

continuous current, with peak current to 400mA. 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

MP3 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= 5.3V @ 275m A

O UT

C_IN

22µF

C_OUT

22µF

V_BAT

SC633

Chip

enable

C1+

C1-

C₁

2.2µF

C2+

C 2-

C₂

2.2µF

G ND

US Patent: 7,808,220

ꢀ

Rev 2.0

12 3 4 5 6 7...15

中文翻译

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