SC493 반도체 회로 부품 판매점
EcoSpeed Step-down Controller
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 Semtech Corporation |
POWER MANAGEMENT
SC493
EcoSpeedTM Step-down Controller
with I2C Interface
Features
Input supply voltage range — 3.0V to 28V
Controller supply voltage range — 3.0V to 5.5V
All ceramic solution enabled
I2C interface
Output voltage fine adjust control
Output voltage margining
Supports dynamic voltage transitions via the I2C
interface
Programmable power-on delay time and soft-start time
EcoSpeedTM architecture with pseudo fixed-frequency
adaptive on-time control
Switching frequency programmable up to 1MHz
Selectable power save, including ultrasonic
Non-synchronous start-up into pre-biased loads
Over-voltage/under-voltage fault protection
Smart power save
Power good Output
Smart driveTM
Status register monitoring device operation
Ultra-thin package — 3 x 3 x 0.6 (mm), 20 pin MLPQ-UT
Lead-free and halogen-free
WEEE and RoHS compliant
Description
The SC493 is a synchronous EcoSpeedTM buck power supply
controller. It features an I2C interface and a bootstrap switch in
a space-saving MLPQ 3X3-20 pin package. The SC493 uses
Semtech’s advanced patented adaptive on-time control archi-
tecture to provide excellent light load efficiency and fast tran-
sient response with small external components.
The I2C interface is used to program the output voltage
offset, the power-on delay time, the soft-start time, the
power save operating mode, and it can enable/disable the
controller. Additionally, a status register provides informa-
tion on device state and faults.
The controller is capable of operating with all ceramic solu-
tions and switching frequencies up to 1MHz. The program-
mable frequency and selectable power save mode offer the
flexibility to optimize the controller for high efficiency and
small size.The power save mode can be enabled to maximize
efficiency over the entire load range (PSAVE), or switched to
ultrasonic mode to set the minimum frequency to the desired
value (UPSAVE). Power save mode can be disabled for opera-
tion in continuous conduction mode at all loads.
Applications
Printers
Computer peripherals
Typical Application Circuit
Additional features include output voltage margining,
cycle-by-cycle current limit, output voltage soft-start, over
and under-voltage protection, controller over-tempera-
ture protection, and output voltage soft-shutdown when
disabled. The SC493 also provides a power good output.
VDD
VIN
Q1 CIN
R1 R2 R3
EN
PGD
SCL
SDA
EN
PGD
SCL
SDA
A0
A1
A2
SC493
BST
LX
DL
RILIM
CBST
L
VOUT
R4
Q2
COUT
R5
June 10, 2010
© 2010 Semtech Corporation
US Patent: 7,714,547 B2
SC493
Pin Configuration
20 19 18 17 16
VOUT
FB
AVDD
SDA
SCL
1
2
3
4
5
TOP VIEW
PAD
15 PGOOD
14 PVDD
13 PGND
12 DL
11 NC
6 7 8 9 10
Ordering Information
Device
Package
SC493ULTRT(1)(2)
MLPQ-UT-20 3X3
SC493EVB
Evaluation Board
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Lead-free packaging only. Device is WEEE and RoHS compliant,
and halogen-free.
MLPQ-UT-20 3X3, 20 LEAD
θJA=40°C/W
Marking Information
493
yyww
xxxxx
yyww = Date Code
xxxxx = Semtech Lot No.
Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners.
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제조업체: Semtech Corporation
( semtech )
SC493 controller
데이터시트 다운로드 :
[ SC493.PDF ]
[ SC493 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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