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参数资料
| 型号： | SC189CULTRT |
| 厂商： | Semtech |
| 文件页数： | 6/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.2V 1.5A 6MLPQ |
| 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： | 1.2V |
| 输入电压： | 2.9 V ~ 5.5 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 2.5MHz |
| 电流 - 输出： | 1.5A |
| 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： | 6-MLPD-UT |
| 包装： | 标准包装 |
| 供应商设备封装： | 6-MLPD-UT（2x2） |
| 产品目录页面： | 1357 (CN2011-ZH PDF) |
| 其它名称： | SC189CULDKR |
SC189
Typical Characteristics ( continued )
Circuit Conditions: C IN = 10uF/6.3V; C OUT = 10uF/6.3V for L=2.2uH; C OUT = 22uF/6.3V for L=1uH.
Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package.
Efficiency vs. Load Current (V OUT =1.5V, SOT23-5)
Efficiency vs. Load Current (V OUT =3.3V, SOT23-5)
100%
Efficiency
100%
V IN = 4.0V
Efficiency
95%
90%
V IN = 5.0V
95%
90%
85%
80%
75%
85%
80%
75%
V IN = 5.0V
70%
V IN = 3.3V
70%
65%
60%
V OUT = 1.50V
T A =25°C
65%
60%
V OUT = 3.30V
T A =25°C
0.0
0.3
0.6
0.9
1.2
1.5
0.0
0.3
0.6
0.9
1.2
1.5
Output Current (A)
Efficiency
Efficiency vs. Load Current (SOT23-5)
Output Current (A)
Efficiency
Efficiency vs. Load Current (SOT23-5)
100%
95%
V IN = 5.0V
V OUT = 1.0V
L=1071AS-2R2 (50m ? _typ)
100%
95%
L=1071AS-2R2N (50m ? _typ)
90%
85%
80%
T A =25°C
L=1071AS-1R0 (33m ? _typ)
90%
85%
80%
L=1071AS-1R0N (33m ? _typ)
75%
75%
L=MDT2520-CR1R0M (60m ? _typ)
70%
65%
L=LQM2HPN1R0MG0 (55m ? _typ)
L=MDT2520-CR1R0 (60m ? _typ)
70%
65%
V IN = 5.0V
V OUT = 3.3V
T A =25°C
L=LQM2HP1R0MG0 (55m ? _typ)
60%
60%
0.0
0.3
0.6 0.9
1.2
1.5
0.0
0.3
0.6 0.9
1.2
1.5
Total Loss vs. Load Current (V OUT =1.5V, SOT23-5)
Total Loss vs. Load Current (V OUT =3.3V, SOT23-5)
800
V OUT = 1.50V
T A =25°C
Output Current (A)
Losses
800
V OUT = 3.30V
T A =25°C
Output Current (A)
Losses
600
V IN = 3.3V
600
400
200
400
200
V IN = 5.0V
V IN = 5.0V
V IN = 4.0V
0
0
0.0
0.3
0.6
0.9
1.2
1.5
0.0
0.3
0.6
0.9
1.2
1.5
Output Current (A)
Output Current (A)
? 2009 Semtech Corp.
6
www.semtech.com
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