Datasheet > SC2308ASTRT

SC2308ASTRT

更新时间： 2024-10-03 12:23:51

品牌	Logo	应用领域
商升特 - SEMTECH		稳压器开关
页数	文件大小	规格书
17页	741K
描述
600kHz Step-Up Switching Regulator with 2.2A, 45V Switch

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SC2308ASTRT 数据手册

SC2308A

600kHz Step-Up Switching

Regulator with 2.2A, 45V Switch

POWER MANAGEMENT

Features

Description



Input Voltage Range: 2.6V to 20V

Boost and SEPIC Topologies

Up to 40V Output in Boost Topology

Integrated 2.2A/45V Switch

600kHz Constant Switching Frequency

Current-Mode Control Eases Compensation

Cycle-by-Cycle Current-Limiting

Internal Soft-Start

Thermal Shutdown Protection

Low Shutdown Current (<ꢀµA)

8-Pin SO Lead-Free Package

The SC2308A is a 600kHz current-mode switching regulator

with an integrated low-side 2.2A power transistor. The oper-

ating supply voltage of the SC2308A ranges from that of a

single Li-ion cell to various PC board power supplies. The

internal switch is rated at 45V, making the device suitable

for high voltage boost and SEPIC applications. The SC2308A

shuts down to less than ꢀµA of supply current.

The SC2308A uses peak current-mode PWM control for ease

of loop compensation and excellent transient response.

Cycle-by-cycle current limiting lowers power transistor

dissipation. An internal soft-start timer prevents output

overshoot and limits the input current during start-up.

Thermal shutdown prevents the chip from overheating.

Fully WEEE and RoHS Compliant

Applications



Telecommunication Equipment

Point of Load DC-DC Converters

Portable Devices

Typical Application Circuit

Efficiency vs Load Current

V_OUT= 12V

OUT

100

12V, 0.8A

10µH

SS22

V_IN= 5V

100k

EN SC2308A

COMP

OFF

22µF

GND

4.7µF

470pF

11.3k

200k

L: Coilcraft DO3316P103

D₁: ON SS22

C₁: Murata GRM31CR61A475K

C₂,C₃: Murata GRM31CR61C226K

200

400

600

800

Load Current (mA)

Figure 1. 5V to 12V Step-Up Converter

ꢀ

Rev. 2.0

12 3 4 5 6 7...17

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