SC630EVB

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	274K
描述
Fixed 3.3V High Output Charge Pump Buck/Boost Regulator

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SC630EVB 数据手册

SC630

Fixed 3.3V High Output

Charge Pump Buck/Boost Regulator

POWER MANAGEMENT

Features

Description

Input voltage range — 2.9V to 5.5V

The SC630 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 battery is greater than 3.3V. Unlike an LDO,

drop-out is avoided when the battery is less than 3.3V.

Instead, a charge pump is activated to provide voltage

boost — the head-room needed for voltage regulation.

_OUTtolerance 3.3V 3ꢀ

V_OUTregulation (line + load) 2ꢀ

Continuous output current — 400mA

Peak output current — 500mA

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

Output ripple ≤ 20mVpp for I_OUT≤ 400mA

Short circuit, over-voltage, and over-temperature

protection

Soft-start functionality

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 buck/boost

regulators.

Shutdown current — 0.1μA, typical

Ultra thin package — 2 x 2 x 0.6 (mm)

Fully WEEE and RoHS compliant

Applications

The SC630’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 20mVpp

at the output. The SC630 is capable of delivering 400mA

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

output capacitor of 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

Multi-LED backlit LCDs

Compact ﬂash/CF+ products

PMPs

Digital video cameras

Digital still cameras

PDAs

The micro lead-frame package is both small and thermally

eﬃcient, measuring 2 x 2 x 0.6 (mm).

Typical Application Circuit

V_OUT= 3.3V @ 400mA

OUT

C_IN

C_OUT

V_BAT

22μF

SC630

Chip

enable

C1+

C₁

2.2μF

C1-

C2+

C2-

C₂

2.2μF

GND

Patents Pending

May 28, 2008

12 3 4 5 6 7...14

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