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参数资料
| 型号： | SC417MLTRT |
| 厂商： | Semtech |
| 文件页数： | 14/33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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SC417/SC427
14
Pin Descriptions
Pin # Pin Name Pin Function
1
FB
Feedback input for switching regulator used to program the output voltage connect to an external resis-
tor divider from VOUT to AGND.
2
FBL
Feedback input for the LDO connect to an external resistor divider from VLDO to AGND used to pro-
gram the LDO output.
3
V5V
5V power input for internal analog circuits and gate drives connect to external 5V supply or configure
the LDO for 5V and connect to VLDO.
4, 30, PAD 1 AGND Analog ground
5
VOUT
Switcher output voltage sense pin also the input to the internal switch-over between VOUT and VLDO.
The voltage at this pin must be less than or equal to the voltage at the V5V pin.
6, 9-11,
PAD 2
VIN Input supply voltage
7
VLDO LDO output The voltage at this pin must be less than or equal to the voltage at the V5V pin.
8
BST
Bootstrap pin connect a capacitor of at least 100nF from BST to LX to develop the floating supply for the
high-side gate drive.
12
DH High-side gate drive do not connect this pin
13
LXBST LX Boost connect to the BST capacitor.
23-25, PAD 3
LX Switching (phase) node
14
DL Low-side gate drive do not connect this pin
15-22
PGND Power ground
26
PGOOD
Open-drain power good indicator high impedance indicates power is good. An external pull-up
resistor is required.
27
ILIM Current limit sense pin used to program the current limit by connecting a resistor from ILIM to LX.
28
LXS LX sense connects to R
ILIM
.
29
EN/PSV
Enable/power-save input for the switching regulator connect to AGND to disable the switching regulator.
Float to operate in forced continuous mode (power-save disabled). SC417 connect to V5V to operate with
ultra-sonic power-save mode enabled. SC427 connect to V5V to operate with power-save mode enabled
with no minimum frequency.
31
TON On-time programming input set the on-time by connecting through a resistor to AGND
32
ENL
Enable input for the LDO connect ENL to AGND to disable the LDO. Drive with logic to +3V for logic con-
trol, or program the VIN UVLO with a resistor divider between VIN, ENL, and AGND.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC417MT.TRT | 制造商:Semtech Corporation 功能描述: |
| SC418 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:EcoSpeedTM DC-DC Buck Controller with Programmable LDO |
| SC418455CFUB | 制造商:Freescale Semiconductor 功能描述: |
| SC418458CFUB | 制造商:Freescale Semiconductor 功能描述: |
| SC418464CFUB | 制造商:Freescale Semiconductor 功能描述: 制造商:Motorola Inc 功能描述: |
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