SC1110CSTR

更新时间： 2024-02-23 11:42:06

品牌	Logo	应用领域
商升特 - SEMTECH		控制器
页数	文件大小	规格书
7页	99K
描述
SINK AND SOURCE DC/DC CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS

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SC1110CSTR 数据手册

SINK AND SOURCE DC/DC CONTROLLER FOR

TERMINATION POWER SUPPLY APPLICATIONS

SC1110

PRELIMINARY - October 9, 2000

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

DESCRIPTION

FEATURES

The SC1110 is a low-cost, full featured, synchronous

voltage-mode controller designed to generate termina-

tion voltage in double data rate (DDR) memory sys-

tems and other applications where wide data bus need

to be actively terminated. Synchronous control of the

MOSFET half bridge allows power flowing bi-

directionally. The termination voltage can be tightly

regulated to track the chipset voltage, i.e. to be exactly

50% of that at all times.

•= ^{Generates termination voltages for active termina-}

tion schemes

•= 1% set point accuracy

•= For ±7A output current, transient regulation is bet-

ter than ±80mV

•= V_REFINpin available

•= Buffered V_REFOUTfor system usage

•= R_DSONsensing for over current protection in hiccup

mode

•= Soft start and logic input enabling

•= 250kHz switching for best transient and efficiency

performance

The SC1110 is ideal for low cost implementation of ter-

mination voltage supplies. SC1110 features include

temperature compensated voltage reference, triangle

wave oscillator and current sense comparator circuitry,

and allows the use of inexpensive N-channel power

switches.

•= Gate drive capable for 0.5A sourcing and sinking

APPLICATIONS

•= For DDR memory systems

•= For active termination schemes in high speed logic

systems

The SC1110 operates at a fixed 250kHz, providing an

optimum compromise between efficiency, transient

performance, external component size, and cost.

ORDERING INFORMATION

DEVICE⁽¹⁾

SC1110CSTR

Note:

PACKAGE

TEMP. RANGE (T_J)

SO-14

0 - 125°C

(1) Only available in tape and reel packaging. A reel

contains 2500 devices.

TYPICAL APPLICATION CIRCUIT

REFOUT

+5Vcc

1.24k

C10,11

2 x 560uF

1.0

C8,9

Vin 2.5V

0.01

2 x 10uF

0.1

SC1110

0.022

VCC

REFOUT

REFIN

SENSE

COMP

BSTL

SS/ENBL

PWRGD

SS/ENBL

OCSET

PWRGD

GND

0.1

0.047

4.7k

C25

0.1

MBRM120

PHASE

BSTH

2.2

1.0

800 nH

Si9426DY

2.2

Si9426DY

C12-14

3 x 560uF

C15-24

10 x 10uF

Vout = 1.25V @ 7A

C10-14: Sanyo, 4SP560M

C8,9,15-24: TDK, CC3216AX5R0J106K

L1: Panasonic, ETQP6F0R8L or Falco, QPIP1205-809-3

Q1,Q2 options: Si9426DY, FDS6890A, IRF7401

D1: ON Semi (Motorola)

652 MITCHELL ROAD NEWBURY PARK CA 91320

12 3 4 5 6 7

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