参数资料
| 型号： | SC198AMLTRT |
| 厂商： | Semtech |
| 文件页数： | 3/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC PROG .8A 20MLPQ |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 可编程 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-MLPQ |
| 包装： | 标准包装 |
| 供应商设备封装： | 20-MLPQ（4x4） |
| 其它名称： | SC198AMLDKR |
NOT RECOMMENDED FOR NEW DESIGN
SC198A
Absolute Maximum Ratings
V IN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +7
V OUT (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to V IN +0.3
V LXA and V LXB (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1 to V IN +1
Pin Voltage - All Other Pins (V) . . . . . . . . . -0.3 to (V IN + 0.3)
Output Short Circuit to GND Duration . . . . . Continuous
LXA and LXB Currents (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2
ESD Protection Level (1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Recommended Operating Conditions
Ambient Temperature Range (°C) . . . . . . . . . . . . . -40 to +85
V IN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 to 5.5
Thermal Information
Thermal Resistance, Junction to Ambient (2) (°C/W) . . . . 31
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150
Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150
Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260
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) Tested according to JEDEC standard JESD22-A114-B.
(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 otherwise noted: V IN = 3.6V, V MODE/SYNC = V IN , L = 4.7μH, C = 10μF, T A = -40°C to +85°C. Typical values are at T A = 25°C for both outputs.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
V OUT = 1.8V
2.7
5.5
Input Voltage Range
V IN
V
V OUT = 3.3V
4.0
5.5
V OUT Accuracy (1)
ΔV OUT
I OUT = 10mA to 800mA , V IN ≥ 0.7V + V OUT
-3
3
%
V IN = 2.7 to 5.5V, V OUT = 1.8V, I OUT = 300mA
Line Regulation
ΔV LINE
0.2
%/V
V IN = 4.0 to 5.5V, V OUT = 3.3V, I OUT = 300mA
I OUT = 10mA to 800mA, V OUT = 1.8V
Load Regulation
ΔV LOAD
0.0008
%/mA
I OUT = 10mA to 800mA, V OUT = 3.3V, V IN = 5.0V
Minimum Duty Cycle
LXA, LXB Current Limit
DC MIN
I LIM
1.2
18
%
A
Quiescent Current
I Q
I OUT = 0mA, SYNC = 0, ENA, ENB = V IN
50
μA
Shutdown Current
I SD
V ENA , V ENB = 0, LXA, LXB = Open
0.1
1
μA
LXA and LXB
Leakage Current
P-Channel On Resistance
I LXA , I LXB
R DSP
V IN = 5.5V, V LX = 0V, PMOS
V IN = 5.5V, V LX = V IN , NMOS
I LXA , I LXB = 100mA
-2
0.1
0.1
0.35
1
μA
μA
Ω
3
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