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參數資料
型號: SC402BMLTRT
廠商: Semtech
文件頁數: 1/32頁
文件大小: 1425K
描述: IC REG DL BCK/LINEAR SYNC 32MLPQ
標準包裝: 1
系列: EcoSpeed®, SmartDrive™
拓撲: 降壓(降壓)同步(1),線性(LDO)(1)
功能: 任何功能
輸出數: 2
頻率 - 開關: 1MHz
電壓/電流 - 輸出 1: 可調至 0.6V,10A
電壓/電流 - 輸出 2: 可調至 0.75V,200mA
帶 LED 驅動器:
帶監控器:
帶序列發生器:
電源電壓: 3 V ~ 28 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應商設備封裝: 32-MLPQ(5x5)
包裝: 標準包裝
其它名稱: SC402BMLDKR
?2011 Semtech Corporation
1
Features
Power System
Input voltage  3V to 28V
Bias voltage  3V to 5.5V LDO or external
Up to 96% peak efficiency
Integrated bootstrap switch
Programmable LDO output  200mA
Reference tolerance  1% T
J
= -40 to +125 癈
Programmable soft start time
Logic Input/Output Control
Independent EN controls for LDO and switcher
Programmable V
IN
 UVLO threshold
Power good output
Selectable PSAVE or FCM mode
Protection
Over-voltage and under-voltage
TC compensated R
DS(ON)
 sensed current limit
Thermal Shutdown
Output Capacitor Types
High ESR  SP, POSCAP, OSCON
Ceramic capacitors
Package
Lead-free package  5x5mm, 32-Pin MLPQ
RoHS/WEEE compliant and Halogen free
Applications
Networking and telecommunication equipment
Printers, DSL, and STB applications
Embedded systems and power supply modules
Point of load power supplies
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Description
The SC402B is a stand-alone synchronous EcoSpeed
?/DIV>
 buck
power supply which incorporates Semtechs advanced
patented adaptive on-time control architecture. This pro-
vides excellent light-load efficiency and fast transient
response. It features integrated power MOSFETs, a boot-
strap switch, and a programmable LDO in a 5x5mm
package. The device is highly efficient and uses minimal
PCB area. The SC402B has the same package and pin con-
fguration as the entire SC40x series for compatibility.
The SC402B supports using standard capacitor types such
as electrolytic or specialty polymer, in addition to ceramic,
at switching frequencies up to 1MHz. The programmable
frequency, synchronous operation, and selectable power-
save provide high efficiency operation over a wide load
range.
Additional features include a programmable soft-start,
programmable cycle-by-cycle over-current limit protec-
tion, under-voltage and over-voltage protection, soft
shutdown, and selectable power-save operation. The
device also provides separate enable inputs for the PWM
controller and LDO as well as a power good output for the
PWM controller.
The wide input and programmable frequency make the
device extremely flexible and easy to use in a broad range
of applications.
Rev. 2.1
POWER MANAGEMENT
RTON
SC402B
FB
VOUT
VDD
VIN
SS
BST
LX
PGOOD
ILIM
LXS
EN/PSV
ENL
RILIM
CBST
ENABLE/PSAVE
ENABLE LDO
VEXT/LDO
+
RFB1
RFB2
VOUT
COUT
L1
CIN
VIN
PGOOD
TON
1礔
CSOFT
10&
Typical Application Circuit
SC402B
10A EcoSpeed
?
Integrated FET
Regulator with Programmable LDO
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