参数资料
| 型号： | SC174MLTRT |
| 厂商： | Semtech |
| 文件页数： | 3/27页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 10MLPD |
| 产品培训模块： | Power Supplies 101 |
| 标准包装： | 1 |
| 系列： | EcoSpeed® |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.75 V ~ 5.23 V |
| 输入电压： | 3 V ~ 5.5 V |
| 频率 - 开关： | 200kHz ~ 1MHz |
| 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： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-MLPD（3x3） |
| 其它名称： | SC174MLDKR |
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SC174
Absolute Maximum Ratings
LX to GND (3) ……………………… - 0.3(DC) to +6.0V(DC) Max
VIN to PGND, EN/PSV to AGND ………………… -0.3 to +6.0V
VIN to VDD…………………………………………………+0.3V
BST to LX ………………………………………… -0.3 to +6.0V
BST to PGND…………………………………… -0.3 to +12V
VDD to AGND, VOUT to AGND………………… -0.3V to +6.0V
FB, PGOOD, TON …………………………… -0.3 to VDD + 0.3V
AGND to PGND………………………………… -0.3 to +0.3V
Peak IR Reflow Temperature ……………….…………… 260°C
Recommended Operating Conditions
Supply Input Voltage……………………………… 3V to 5.5V
Maximum Continuous Output Current …………………… 4A
Thermal Information
Storage Temperature …………………………… -60 to +150°C
Maximum Junction Temperature ……………………… 150°C
Operating Junction Temperature ……………… -40 to +125°C
Thermal Resistance, Junction to Ambient (1) ………… 40°C/W
ESD Protection Level (2) ………………………………………1kV
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) 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.
(2) Tested according to JEDEC standard JESD22-A114-B
(3) Due to parasitic board inductance, the transient LX pin voltage at the point of measurement may appear larger than that which exists on
silicon. The device is designed to tolerate the short duration transient voltages that will appear on the LX pin due to the deadtime diode
conduction, for inductor currents up to the current limit setting of the device. See application section for details.
Electrical Characteristics
Unless specified: V IN =5V, T A =+25°C for Typ, -40°C to +85°C for Min and Max, T J < 125°C
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Input Supplies
VIN, VDD Input Voltage
3
5.5
V
VDD UVLO Threshold
VDD UVLO Hysteresis
Rising UVLO V TH
2.75
100
2.85
200
2.98
V
mV
EN/PSV= 0V
5
15
VIN, VDD Supply Current
I OUT =0A, PSAVE, f SW =25kHz (1)
Forced Continuous Conduction Mode
I OUT =0A , f SW =500kHz (1)
500
1000
μA
Controller
FB On-Time Threshold
0.7425
0.75
0.7575
V
Frequency Programming Range
FB Input Bias Current
See R TON Calculation
FB=VDD or 0V
200
-1
1000
+1
kHz
μA
? 2010 Semtech Corporation
3
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