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参数资料
| 型号： | SC424MLTRT |
| 厂商： | Semtech |
| 文件页数： | 12/29页 |
| 文件大小： | 496K |
| 描述： | IC REG DL BUCK/LINEAR 28MLPQ |
| 标准包装： | 1 |
| 系列： | 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： | 200kHz ~ 1MHz |
| 电压/电流 - 输出 1： | 可调至 0.75V，6A |
| 电压/电流 - 输出 2： | 5V，150mA |
| 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： | 28-VFQFN 裸露焊盘 |
| 供应商设备封装： | 28-MLPQ（4x4） |
| 包装： | 标准包装 |
| 其它名称： | SC424MLDKR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页当前第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
SC414/SC424
12
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
V5V
Bias input for internal analog circuits and gate drives connect to external 3V or 5V supply or bias connec-
tion to VLDO.
3, 26, PAD 1 AGND Analog ground
4
VOUT Switcher output voltage sense pin, and also the input to the internal switch-over between VOUT and VLDO.
5, 8-11
PAD 2
VIN Input supply voltage
6
VLDO 5V LDO output
7
BST
Bootstrap pin connect a capacitor from BST to LXBST to develop the fl oating supply for the high-side gate
drive.
12
LXBST LX Boost connect to the BST capacitor.
15,20, 21,
PAD 3
LX Switching (phase) node
13, 14, 16-19 PGND Power ground
22
PGOOD
Open-drain power good indicator high impedance indicates power is good. An external pull-up
resistor is required.
23
ILIM Current limit sense pin used to program the current limit by connecting a resistor from ILIM to LXS.
24
LXS LX sense connects to RILIM resistor
25
EN/PSV
Enable/power save input for the switching regulator connect to AGND to disable the switching regula-
tor. Float to operate in forced continuous mode (power save disabled). For SC414, connect to V5V to operate
with ultrasonic power save mode enabled. For SC424, connect to V5V to operate with power save mode
enabled with no minimum frequency.
27
TON On-time programming input set the on-time by connecting through a resistor to AGND
28
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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