参数资料
型号: SC419ULTRT
厂商: Semtech
文件页数: 4/24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
Electrical Characteristics (continued)
Parameter
Frequency Range
Conditions
Continuous mode operation
Min
Typ
Max
1000
Units
kHz
Timing
On-Time
Forced continuous mode operation,
V IN = 15V, V OUT = 5V, R TON = 300k?
2385
2650
2915
ns
Minimum On-Time (1)
Minimum Off-Time (1)
Soft-Start
80
250
ns
ns
Soft-Start Ramp Time (1)
V OUT ramp from zero to programmed value
850
μs
Analog Inputs/Outputs
VOUT Input Resistance
Current Sense
500
k?
Zero Cross Detector Threshold
LX - PGND
-7
0
+7
mV
Power Good
Power Good Threshold
Start-Up Delay Time
Fault (noise immunity) Delay Time (1)
Leakage
Power Good On-Resistance
Upper limit, V FB > internal 500mV reference
Lower limit, V FB < internal 500mV reference
Includes Soft-Start Ramp Time
+20
-10
2
5
10
1
%
%
ms
μs
μA
?
Fault Protection
I LIM Source Current
I LIM Source Current Temperature Coefficient (1)
I LIM Comparator Offset
Output Under-Voltage Threshold
Smart Power-Save Protection Threshold (1)
Over-Voltage Protection Threshold
Over-Voltage Fault Delay (1)
Over-Temperature Shutdown (1)
V FB with respect to internal 500mV reference,
8 consecutive cycles
V FB with respect to internal 500mV reference
V FB with respect to internal 500mV reference
10°C hysteresis
9
-8
10
0.41
0
-25
+10
+20
5
150
11
+8
μA
%/°C
mV
%
%
%
μs
°C
4
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