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参数资料
| 型号： | SC185QULTRT |
| 厂商： | Semtech |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 3.3V 4A 16MLPQ |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 2.9 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 4A |
| 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： | 16-UFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-MLPQ-UT（3x3） |
| 其它名称： | SC185QULDKR |
SC185
Typical Characteristics
Circuit Conditions: C IN = 22uF/6.3V, C OUT = 2 x 22uF/6.3V, C SS = 10nF. Unless otherwise noted, L= 1.0uH (TOKO: FDV0530S-1R0).
Efficiency
Efficiency (Forced PWM)
Efficiency (PSAVE Enabled)
100%
95%
90%
85%
80%
75%
70%
65%
V IN =5.0V;V OUT =1.5V
T A = 25°C
V IN =5.0V;V OUT =3.3V
V IN =3.3V;V OUT =1.5V
100%
95%
90%
85%
80%
75%
70%
65%
Vin = 5V, Vout = 3.3V
Vin = 3.3V, Vout = 1.5V
Vin = 5V, Vout = 1.5V
T A = 25 o C
60%
0.0
0.5
1.0
1.5 2.0 2.5
Output Current (A)
3.0
3.5
4.0
60%
0.0
0.1 1.0
Output Current (A)
10.0
Total Loss (Forced PWM)
2000
Total Loss
0.60%
Load Regulation (Forced PWM)
1600
T A =25°C
V IN =3.3V;V OUT =1.5V
0.50%
0.40%
T A = 25 o C
0.30%
1200
800
V IN =5.0V;V OUT =3.3V
0.20%
0.10%
0.00%
-0.10%
Vin = 5.0V, Vout = 3.3V
400
0
V IN =5.0V;V OUT =1.5V
-0.20%
-0.30%
-0.40%
-0.50%
-0.60%
Vin = 3.3V, Vout = 1.5V
Vin = 5V, Vout = 1.5V
0.0
0.5
1.0
1.5 2.0 2.5
3.0
3.5
4.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
R DS(ON) Variation vs. Temperature
35%
Output Current (A)
RDSON (P & vs.Input over Line
R DS(ON) Variation N) Variation Voltage
20%
Output current (A)
RDSON (P & N) Variation Over Temperature
30%
25%
15%
10%
V IN = 5.0V
I LX = ±100mA
20%
P-Channel
5%
15%
0%
10%
5%
-5%
P-Channel
0%
-5%
I LX = ±100mA
T A = 25°C
N-Channel
-10%
-15%
N-Channel
-10%
-20%
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
-15
10
35
60
85
Input Voltage (V)
Ambient Temperature (°C)
? 2010 Semtech Corp.
7
www.semtech.com
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