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| 型号： | SC417MLTRT |
| 厂商： | Semtech |
| 文件页数： | 1/33页 |
| 文件大小： | 894K |
| 描述： | IC REG DL BUCK/LINEAR 32MLPQ |
| 产品培训模块： | Power Supplies 101 |
| 标准包装： | 1 |
| 系列： | EcoSpeed®, SmartDrive™ |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 1MHz |
| 电压/电流 - 输出 1： | 可调，10A |
| 电压/电流 - 输出 2： | 5V，200mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 3 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-MLPQ（5x5） |
| 包装： | 标准包装 |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC417MLDKR |
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?2010 Semtech Corporation
1
SC417/SC427
10A EcoSpeed
TM
Integrated FET
Regulator with Programmable LDO
Features
Power system:
Input voltage 3V to 28V
Integrated bootstrap switch
Programmable LDO output 200mA
1% reference tolerance -40 to +85 癈
Selectable internal/external bias power supply
EcoSpeed
TM
architecture with pseudo-fixed fre-
quency adaptive on-time control
Logic input/output control
Independent control EN for LDO and switcher
Programmable V
IN
UVLO threshold
Power good output
Selectable ultrasonic/power save methods
Protections
Over-voltage/under-voltage
TC compensated R
DS(ON)
sensed current limit
Thermal shutdown
Output capacitor types
High ESR SP, POSCAP, OSCON
Ceramic capacitors
Package 5x5mm, 32-pin MLPQ
Lead-free and halogen free
RoHS and WEEE compliant
Applications
Office automation and computing
Networking and telecommunication equipment
Point-of-load power supplies and module replacement.
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Description
The SC417/SC427 is a stand-alone synchronous
EcoSpeed
TM
buck regulator which incorporates Semtechs
advanced, patented adaptive on-time control architecture
to provide 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
15x20mm PCB area for a total converter solution. Refer to
page 16 for information on the C-SIM simulation tool.
The SC417/SC427 supports using standard capacitor types
such as electrolytic or special polymer, in addition to
ceramic, at switching frequencies up to 1MHz. The pro-
grammable frequency, synchronous operation, and select-
able power-save provide high efficiency operation over a
wide load range. In power-save mode, the minimum oper-
ating frequency for the SC417 is 25kHz whereas the SC427
has no minimum.
Additional features include internal soft-start, program-
mable cycle-by-cycle over-current limit protection, under
and over-voltage protections and soft shutdown. 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 voltage range, programmable frequency,
and programmable LDO make the device extremely flexible
and easy to use in a broad range of applications. Support is
provided for single cell or multi-cell battery systems in addi-
tion to traditional DC power supply applications.
May 20, 2010
POWER MANAGEMENT
SC417/SC427
V5V
BST
LX
PGOOD
ILIM
LXS
EN/PSV
TON
ENL
LXBST
RILIM
CBST
+
RFB1
RFB2
VOUT
COUT
1礔
L1
VEXT/LDO
CIN
PGND
AGND
VIN
VIN
VOUT
FB
PGOOD
ENABLE LDO
ENABLE/PSAVE
RTON
Typical Application Circuit
US Patent: 7,714,547 B2
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相关代理商/技术参数 |
参数描述 |
|---|---|
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