LM2831XMF

Input Voltage MAX : 5.5 V
Number of Outputs : 1
Maximum Operating Temperature : + 125 C
Mounting Style : SMD/SMT
Output Voltage : 0.6 V to 4.5 V
Output Current : 1.5 A
Switching Frequency : 1600 KHz
Package / Case : SOT-23


Pinout






Specifications






Description

The LM2831XMF belongs to LM2831 regulator family which is a monolithic, high frequency, PWM step-down DC/DC converter in a 5 pin SOT23 and a 6 Pin LLP package. 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 over-voltage protection. The ability to drive 1.5A loads with an internal 130 m PMOS switch using state-of-the-art 0.5 m BiCMOS technology results in the best power density available. The world- class control circuitry allows on-times as low as 30ns, thus supporting exceptionally high frequency conversion over the entire 3V to 5.5V input operating range down to the minimum output voltage of 0.6V. It 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. Switching frequency is internally set to 550 kHz, 1.6 MHz, or 3.0 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficien- cies up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30 nA.

The features of LM2831XMF can be summarized as (1)space saving SOT23-5 package; (2)input voltage range of 3.0V to 5.5V; (3)output voltage range of 0.6V to 4.5V; (4)1.5A output current; (5)high switching frequencies 1.6MHz (LM2831X), 0.55MHz (LM2831Y); (6)3.0MHz (LM2831Z); (7)130m PMOS switch; (8)0.6V, 2% Internal Voltage Reference; (9)internal soft-start; (10)current mode, PWM operation; (11)thermal shutdown; (12)over voltage protection.

The absolute maximum ratings of LM2831XMF are (1)VIN: -0.5V to 7V; (2)FB Voltage: -0.5V to 3V; (3)EN Voltage: -0.5V to 7V; (4)SW Voltage: -0.5V to 7V; (5)ESD Susceptibility: 2kV; (6)junction temperature (Note 2): 150°C; (7)storage temperature: -65°C to +150°C soldering information; (8)infrared or convection reflow (15 sec): 220°C.

The LM2831XMF is a monolithic, high frequency, PWM step-down DC/DC converter in a 5 pin SOT23 package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

The features of LM2831XMF can be summarized as:(1)Space Saving SOT23-5 Package; (2)nput voltage range of 3.0V to 5.5V; (3)Output voltage range of 0.6V to 4.5V; (4)1.5A output current; (5)High Switching Frequencies 1.6MHz ; (6)130m PMOS switch; (7)0.6V, 2% Internal Voltage Reference; (8)Internal soft-start; (9)Current mode, PWM operation; (10)Thermal Shutdown; (11)Over voltage protection.

The absolute maximum ratings of LM2831XMF are:(1)VIN:-0.5V to 7V; (2)FB Voltage:-0.5V to 3V; (3)EN Voltage:-0.5V to 7V; (4)SW Voltage:-0.5V to 7V; (5)ESD Susceptibility:2kV; (6)Junction Temperature:150°C; (7)Storage Temperature:-65°C to +150°C; (8)Infrared or Convection Reflow(15 sec):220°C.

If you want to know more information such as the electrical characteristics about the LM2831XMF, please download the datasheet in www.seekic.com or www.chinaicmart.com .