参数资料
型号: SC424MLTRT
厂商: Semtech
文件页数: 4/29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:
带监控器:
带序列发生器:
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
SC414/SC424
4
Absolute Maximum Ratings
LX to PGND (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30
LX to PGND (V) (transient  100ns max.) . . . . . . -2 to +30
VIN to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30
EN/PSV, PGOOD, ILIM, to GND (V) . . . . . . -0.3 to +(V5V + 0.3)
VOUT, VLDO, FB, to GND (V) . . . . . . . . . . . -0.3 to +(V5V + 0.3)
V5V to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6
TON to PGND (V) . . . . . . . . . . . . . . . . . . . . . -0.3 to +(V5V - 1.5)
ENL (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to V
IN
BST to LX (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
BST to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +35
AGND to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3
ESD Protection Level
(1)
(kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Recommended Operating Conditions
Input Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 to 28
V5V to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 to 5.5
VOUT to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . .0.75 to 5.5
Thermal Information
Storage Temperature (癈) . . . . . . . . . . . . . . . . . . . . -60 to +150
Maximum Junction Temperature (癈) . . . . . . . . . . . . . . . .150
Operating Junction Temperature (癈) . . . . . . . .-40 to +125
Thermal resistance, junction to ambient
(2)
 (癈/W)
High-side MOSFET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Low-side MOSFET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
PWM controller and LDO thermal resistance . . . . . 40
Peak IR Refl ow Temperature (癈) . . . . . . . . . . . . . . . . . . . . 260
Exceeding the above specifi cations may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specifi ed in the Electrical Characteristics section is not recommended.
NOTES:
(1) Tested according to JEDEC standard JESD22-A114.
(2) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Unless specifi ed: V
IN
 =12V, T
A
 = +25癈 for Typical, -40 to +85 癈 for Min. and Max., T
J
 < 125癈, V5V = +5V, Typical Application Circuit
Electrical Characteristics
Parameter
Conditions
Min  Typ  Max  Units
Input Supplies
VIN UVLO Threshold
(1)
(not available for V5V < 4.5V)
Sensed at ENL pin, rising edge
2.40   2.60   2.95
V
Sensed at ENL pin, falling edge
2.235   2.40   2.565
VIN UVLO Hysteresis
EN/PSV = High
0.2
V
V5V UVLO Threshold
Measured at V5V pin, rising edge
2.50   2.9    3.0
V
Measured at V5V pin, falling edge
2.40   2.7   2.90
V5V UVLO Hysteresis
0.2
V
VIN Supply Current
ENL, EN/PSV = 0V, V
IN
 = 28V
8.5    20
Standby mode; ENL=V5V, EN/PSV = 0V
130
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