UC2874-2 高效同步步降（降压）控制器
|
UC2874-2 |
| Topology |
Buck |
| Vin(Min)(V) |
10 |
| Vin(Max)(V) |
36 |
| Vout(Min)(V) |
2.5 |
| Vout(Max)(V) |
30 |
| Regulated Outputs(#) |
1 |
| Iout(Max)(A) |
0.5 |
| Switching Frequency(Max)(kHz) |
100 |
| Iq(Typ)(mA) |
8.5 |
| Pin/Package |
18PDIP, 18SOIC |
| Rating |
Catalog |
| Duty Cycle(Max)(%) |
92 |
UC2874-2 描述
The UC3874 family of synchronous step-down (Buck) regulators provides high efficiency power conversion from an input voltage range of 4.5 to 36 volts. The UC3874 is tailored for battery powered applications such as laptop computers, consumer products, communications systems, and aerospace which demand high performance and long battery life. The synchronous regulator replaces the catch diode in the standard buck regulator with a low Rds(on) N-channel MOSFET switch allowing for significant efficiency improvements. The high side N-channel MOSFET switch is driven out of phase from the low side N-channel MOSFET switch by an on-chip bootstrap circuit which requires only a single external capacitor to develop the regulated gate drive.
UC2874-2 特性
- Operation to 36V Input Voltage
- Fixed Frequency Average Current Mode Control
- Standby Mode for Improved Efficiency at Light Load
- Drives External N-Channel MOSFETs for Highest Efficiency
- Sleep Mode Current < 50mA
- Complementary 1 Amp Outputs with Regulated Gate Drive Voltage
- LDO (Low Drop Out) Virtual 100% Duty Cycle Operation
- Non-Overlapping Gate Drives
UC2874-2 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| UC2874DW-2 |
ACTIVE |
-40 to 85 |
5.55 | 1ku |
SOIC (DW) | 18 |
40 | TUBE |
UC2874DW-2 |
| UC2874DW-2G4 |
ACTIVE |
-40 to 85 |
5.55 | 1ku |
SOIC (DW) | 18 |
40 | TUBE |
UC2874DW-2 |
| UC2874N-2 |
ACTIVE |
-40 to 85 |
5.95 | 1ku |
PDIP (N) | 18 |
20 | TUBE |
UC2874N-2 |
| UC2874N-2G4 |
ACTIVE |
-40 to 85 |
5.95 | 1ku |
PDIP (N) | 18 |
20 | TUBE |
UC2874N-2 |
| UC2874Q-2 |
NRND |
-40 to 85 |
|
PLCC (FN) | 20 |
|
|
UC2874-2 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| UC2874DW-2 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UC2874DW-2 |
| UC2874DW-2G4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UC2874DW-2G4 |
| UC2874N-2 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
|
UC2874N-2 |
| UC2874N-2G4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
N/A for Pkg Type |
|
UC2874N-2G4 |
UC2874-2 应用技术支持与电子电路设计开发资源下载
- UC2874-2 数据资料 dataSheet 下载.PDF
- TI 德州仪器非隔离式开关 DC/DC 调节器选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Understanding Boost Power Stages In Switchmode Power Supplies
(PDF 149 KB)
- Understanding Buck Power Stages In Switchmode Power Supplies
(PDF 173 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
