参数资料
| 型号： | SC419ULTRT |
| 厂商： | Semtech |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 20-MLPQ |
| 标准包装： | 1 |
| 系列： | EcoSpeed®, SmartDrive™ |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 电源电压： | 3 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-MLPQ |
| 包装： | 标准包装 |
| 其它名称： | SC419ULTRTDKR |
SC419
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POWER MANAGEMENT
Features
? Power system
Input voltage — 3V to 28V
Integrated bootstrap switch
1% reference tolerance -40 to +85 °C
EcoSpeed TM architecture with pseudo-fixed fre-
quency adaptive on-time control
Internal soft-start and soft-shutdown at output
SmartDrive TM
? Logic input/output control
Independent control EN for LDO and switcher
Programmable V IN UVLO threshold
Power good output
Selectable power save mode
Programmable ultrasonic power save mode
? Protections
Over-voltage/under-voltage
TC compensated R DS(ON) sensed current limit
Thermal shutdown
Smart power save
? Output capacitor types
High ESR — SP, POSCAP, OSCON
Ceramic capacitors
? Package — 3 x 3mm, 20-pin MLPQ
? Lead-free and halogen free
? RoHS and WEEE compliant
Applications
? Office automation and computing
EcoSpeed TM DC-DC Converter
with Integrated Boost Diode
Description
The SC419 is a synchronous buck power supply controller.
It features a bootstrap switch in a space-saving MLPQ-
3 x 3mm 20-pin package. The device is highly efficient
and uses minimal PCB area. It uses pseudo-fixed frequency
adaptive on-time operation to provide fast transient
response.
The SC419 supports using standard capacitor types such
as electrolytic or special polymer in addition to ceramic, at
switching frequencies up to 1MHz. The programmable
frequency, synchronous operation, and programmable
power-save provide high efficiency operation over a wide
load range.
Additional features include cycle-by-cycle current limit,
soft-start, under and over-voltage protection, program-
mable over-current protection, soft shutdown, selectable
power-save modes, and programmable ultra-sonic power-
save. The device also provides an enable input and a
power good output, useful for sequencing multiple
devices.
The input voltage can range from 3V to 28V. The wide
input voltage range and programmable frequency 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 addition to traditional DC
power supply applications.
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Networking and telecommunication equipment
Point-of-load power supplies and module replacement
Typical Application Circuit
VIN
VIN
5V
PGOOD
VIN
PGOOD
DH
VIN
CIN
ENABLE
5V
0.1μF
RTON
1μF
EN
TON
VDDA
VDDP
SC419
LX
BST
ILIM
DL
RILIM
L1
+
COUT
VOUT
VOUT
PSV
PSV
AGND
PGND
FB
July 27, 2010
? 2010 Semtech Corporation
1
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相关代理商/技术参数 |
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| SC420 | 功能描述:UPS - 不间断电源 420VA/260W 4 Outlet RoHS:否 制造商:Phoenix Contact 功率额定值: 输出电压额定值:24 V 出口数量:2 运行时间（满载）: 运行时间（半载）: |
| SC4201 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Multi-Phase Link Controller |
| SC4201_04 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Multi-Phase Link Controller |
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