参数资料
| 型号： | SC2440TETRT |
| 厂商： | Semtech |
| 文件页数： | 3/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 2A DL 16TSSOP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出数： | 2 |
| 输入电压： | 2.8 V ~ 20 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-TSSOP |
| 产品目录页面： | 1358 (CN2011-ZH PDF) |
| 其它名称： | SC2440TEDKR |
SC2440
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: -40°C < T A < 85°C, -40°C < T J < 105°C, R OSC = 12.1K ? , V SYNC = 0, V IN = 5V, V BOOST = 8V
Parameter
COMP Switching Threshold
COMP Maximum Voltage
Channel Switching Frequecy
Maximum Duty Cycle
Switch Current Limit
Switch Saturation Voltage
Conditions
V FB = 0.9V
(Note 2)
V FB = 0.9V, V SS = 2.3V, COMP Pin Open
I SW = -2A
Min
0.7
1.2
80
2
Typ
1.1
2.2
1.4
90
2.6
0.3
Max
1.3
1.6
0.48
Units
V
V
MHz
%
A
V
Switch Leakage Current
10
μA
Minimum Boost Voltage
Boost Pin Current
I SW = -2A
I SW = -0.5A
I SW = -2A
1.8
20
60
2.5
30
80
V
mA
mA
Minimum Soft-Start Voltage to Exit
SS1 Tied to SS2
0.2
0.4
0.7
V
Shutdown
Soft-start Charging Current
Soft-start Discharging Current
Minimum Soft-start Voltage to
V SS = 0V
V SS = 1.5V
V SS = 1.5V
V SS Rising
2
1.8
0.8
2
μA
μA
μA
V
Enable Overload Shutoff
FB Overload Threshold
V SS = 2.3V, V FB Falling
0.74
V
Soft-start Voltage to Restart
V SS Falling
0.7
1
1.3
V
Switching After Overload Shutoff
Power Good Threshold Below FB
Power Good Output Low Voltage
Power Good Pin Leakage Current
V FB Rising
V FB = 0.8V, I PGOOD = 250μA
V PGOOD = 5V
80
100
0.2
0.1
120
0.4
1
mV
V
μA
SYNC Input High Voltage
2
V
SYNC Input Low Voltage
(Note 1)
0.8
V
SYNC Frequency
SYNC Frequency = 2 X Channel
3.4
5
MHz
Frequency. (Note 1)
SYNC Pin Input Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V SYNC = 2V
60
155
10
75
μA
°C
°C
Notes: (1) Guaranteed by design, not tested in production.
(2) The maximum duty cycle specified corresponds to 1.4MHz switching frequency. Duty cycles higher than those specified can be
achieved by lowering the operating frequency.
(3) This device is ESD sensitive. Use of standard ESD handling precautions is required.
? 2005 Semtech Corp.
3
www.semtech.com
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| SC2441ATETRT | 制造商:Semtech Corporation 功能描述: |
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