参数资料
| 型号： | SC283WLTRT |
| 厂商： | Semtech |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 1.8A 18MLPQ |
| 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： | 0.8 V ~ 3.3 V |
| 输入电压： | 2.9 V ~ 5.5 V |
| 频率 - 开关： | 2.5MHz |
| 电流 - 输出： | 1.8A |
| 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： | 18-WFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 18-MLPQ-W（2x3） |
| 其它名称： | SC283WLDKR |
SC283
Absolute Maximum Ratings
VINA and VINB Supply Voltages ………………… -0.3 to 6.0V
Recommended Operating Conditions
Supply Voltage VINA and VINB …………………… 2.9 to 5.5V
LXA, LXB Voltage …. .
-1 to VIN+1V, -3V (20ns Max), 6V Max
Maximum Output Current for each channel ………… 1.8A
VOUTA, VOUTB Voltage ……………………
-0.3 to VIN+0.3V
Temperature Range …………………………… -40 to +85?C
CTLxA/B pins Voltages
…………………
-0.3 to VIN+0.3V
Peak IR Reflow Temperature …………………………. 260°C
ESD Protection Level (6)
………………………………
3.5kV
Thermal Information
Thermal Resistance, Junction to Ambient (5) ………… 65 °C/W
Maximum Junction Temperature …………………… +150°C
Storage Temperature Range ………………… -65 to +150 °C
Exceeding the absolute maximum ratings may result in permanent damage to the device and/or device malfunction. Operation outside of the
parameters specified in the Electrical Characteristics section is not recommended.
Notes:
(5) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
(6) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
Unless specified: VINA= VINB= 5.0V, VOUTA= VOUTB=1.50V, C INA =C INB =10μF, C OA =C OB = 22μF, L= 2.2μH, -40°C≤ T J ≤ +125 °C. Unless otherwise noted
typical values are T A = +25 °C.
Parameter
Symbol
Conditions
Rising VINA, VINB
Min
2.65
Typ
2.75
Max
2.85
Units
V
Under-Voltage Lockout
UVLO
Hysteresis
240
300
mV
Output Voltage Tolerance (7)
ΔV OUT
Channel A & B; VIN= 2.9 – 5.5V; I OUT =0A
-2.0
+2.0
%
Current Limit
Supply Current
Shutdown Current
High Side Switch Resistance (8)
Low Side Switch Resistance (8)
L X Leakage Current (8)
Load Regulation
Oscillator Frequency
Soft-Start Time
Foldback Holding Current
CTLx Input Current (8)
CTLx Input High Threshold
I LIMIT
I Q
I SHDN
R DSON_P
R DSON_N
I LK(LX)
ΔV LOAD-REG
f OSC
t SS
I CL_HOLD
I CTL_
V CTLx_HI
Channel A & B; Peak LX current
Channel A & B; No load, Per channel
CTL 0-3 = GND, Per channel
Channel A & B; I LX = 100mA, T J = 25 °C
Channel A & B; I LX = -100mA, T J = 25 °C
Channel A & B; VIN= 5.5V; LX= 0V; CTL 0-3 = GND
Channel A & B; VIN= 5.5V; LX= 5.0V; CTL 0-3 = GND
Channel A & B; VIN= 5.0V; I OUT =1mA – 1.8A
Channel A & B
Channel A & B; I OUT = 1.8A
Average LX Current, VOUT=1.5V
Average LX Current, VOUT=3.3V
Channel A & B; CTL 0-3 =VIN or GND
Channel A & B
2.25
-10
2.125
-2.0
1.2
3.0
10
1
95
65
1
-1
±0.5
2.500
850
240
130
3.75
10
10
2.875
2.0
A
mA
μA
mΩ
μA
%
MHz
μs
mA
mA
μA
V
? 2010 Semtech Corp.
3
www.semtech.com
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