参数资料
型号: SC419ULTRT
厂商: Semtech
文件页数: 3/24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:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
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
Absolute Maximum Ratings (1)
LX to PGND (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 to +30
LX to PGND (V) (transient — 100ns) . . . . . . . . . . . -2 to +30
DH, BST to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +35
DH, BST to LX (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6
DL to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6
VIN to PGND (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +30
EN, FB, ILIM, to AGND (V) . . . . . . . . . . . -0.3 to +(VDDA + 0.3)
PGOOD, PSV, VOUT to AGND (V) . . . . -0.3 to +(VDDA + 0.3)
TON to AGND (V). . . . . . . . . . . . . . . . . . . -0.3 to +(VDDA -1.5)
VDDP to PGND, VDDA to AGND (V) . . . . . . . . . . . . 0.3 to +6
VDDA to VDDP (V) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3
Recommended Operating Conditions
Input Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 to 28
VDDA to AGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 to 5.5
VDDP to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 to 5.5
VOUT to AGND (V). . . . . . . . . . . . . . . . . . . . . . . 0.5 to VDDA
Thermal Information
Storage Temperature (°C) . . . . . . . . . . . . . . . . . . . . -60 to +150
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . . 150
Operating Junction Temperature (°C) . . . . . . . . -40 to +125
Thermal resistance, junction to ambient (2) (°C/W) . . . . . 50
Peak IR Reflow Temperature (°C) . . . . . . . . . . . . . . . . . . . . 260
AGND to PGND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +0.3
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES:
(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.
(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.
Electrical Characteristics
Unless specified: V IN =12V, VDDA = VDDP = 5V, T A = +25°C for Typ, -40 to +85 °C for Min and Max, T J < 125°C, Typical Application Circuit
Parameter
Conditions
Min
Typ
Max
Units
Input Supplies
Input Supply Voltage
VDDA, VDDP Voltage
3
4.5
28
5.5
V
V
VDDA UVLO Threshold
VDDA UVLO Hysteresis
Measured at VDDA pin, rising edge
Measured at VDDA pin, falling edge
3.7
3.5
3.9
3.6
0.3
4.1
3.75
V
V
VIN Supply Current
VDDA + VDDP Supply Current
EN = AGND
EN = AGND
EN = 5V, R PSV = 115k?, V FB > 500mV (1)
EN = 5V, PSV = open (float), V FB > 500mV (1)
8.5
3
3
0.7
20
7
μA
μA
mA
Operating f SW = 250kHz, PSV = VDDA, no load (1)
10
Static VIN and load, 0 to +85 °C
0.496
0.500
0.504
V
FB On-Time Threshold
Static VIN and load, -40 to +85 °C
0.495
0.505
V
3
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