LM2831 - 高频 1.5A 负载 - 降压 DC-DC 稳压器

LM2831是TI德州仪器公司的一款转换器（集成开关）产品，LM2831是高频 1.5A 负载 - 降压 DC-DC 稳压器，本站介绍了LM2831的封装应用图解、特点和优点、功能等，并给出了与LM2831相关的TI元器件型号供参考。

LM2831 - 高频 1.5A 负载 - 降压 DC-DC 稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

Space-Saving SOT-23 Package
Input Voltage Range of 3 V to 5.5 V
Output Voltage Range of 0.6 V to 4.5 V
1.5-A Output Current
High Switching Frequencie
- 1.6 MHz (LM2831X)
- 0.55 MHz (LM2831Y)
- 3 MHz (LM2831Z)
130-mΩ PMOS Switch
0.6-V, 2% Internal Voltage Reference
Internal Soft Start
Current Mode, PWM Operation
Thermal Shutdown
Overvoltage Protection

产品应用

Local 5 V to Vcore Step-Down Converters
Core Power in HDDs
Set-Top Boxes
USB Powered Devices
DSL Modems

产品说明

The LM2831 regulator is a monolithic, high-frequency, PWM step-down DC-DC converter in a 5-pin SOT-23 and a 6-Pin WSON package. The LM2831 provides all the active functions to provide local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LM2831 is easy to use. The ability to drive 1.5-A loads with an internal 130-mΩ PMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. The world-class control circuitry allows on-times as low as 30 ns, thus supporting exceptionally high frequency conversion over the entire 3 V to 5.5 V input operating range, down to the minimum output voltage of 0.6 V. Switching frequency is internally set to 550 kHz, 1.6 MHz, or 3 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficiencies of up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA. The LM2831 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM2831	WSON (6)	3.00 mm × 3.00 mm
LM2831	SOT-23 (5)	1.60 mm × 2.90 mm

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