A step-down converter, also known as a buck converter, is a type of DC-DC converter used to step down or reduce the voltage level of a DC power source to a lower voltage level, which is usually required for powering various electronic devices and components. It operates by controlling the on-off switching of its components to regulate the output voltage.

Part Number: MP1583

Function: 3A, 23V, 385KHz, Step-Down Converter

Package: DIP, SOIC 8 Pin Type

Manufacturer: MPS ( www.MonolithicPower.com )

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Description

The MP1583 is a step -down regulator with a built-in internal Power MOSFET. It achieves 3A of continuo us output current over a wide input supply range with excellent load and line regulation. Current mo de operatio n provides f ast transien t response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting a nd thermal shutdown. An adjustab le soft-start reduces the stress on the input source at startup. In shutdown mode the regulator dr aws 20 μA of supply current. The MP158 3 requires a minimu m number of external components, providing a compact solution.

Features

• 3A Output Current

• Programmable Soft-Start

• 100mΩ Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic Capacitors

• Up to 95% Efficiency

• 20μA Shutdown Mode

• Fixed 385KHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Wide 4.75V to 23V Operating Input Range

• Output Adjustable from 1.22V to 21V

Pinouts:

Applications:

• Distributed Power Systems

• Battery Chargers

• Pre-Regulator for Linear Regulator

MP1583 PDF Datasheet

Part Number: RT5035A

Function: 7+3 Channel DC/DC Converter

Package: WQFN-40L 5×5 Type

Manufacturer: Richtek

Images:

Description

RT5035A / RT5035B is a highly-integrated DSC Power Management IC that contains 7ch switching DC/DC converters and two generic LDOs, one keep-alive low-quiescent LDO for RTC, one load switch with soft-start control and current limit, a switch with reverse leakage prevention for backup battery, and a Real-Time-Clock (RTC) including time counter and 32768Hz oscillator. The DC/DC converters are one low-voltage Step-Up operated in either Async-PFM or Sync-PWM, one current mode Sync Step-Up/Down (Buck-Boost), four Sync Step-Down, and one Asyn Step-Up for WLED driver.

Features

1. CH1 Sync Step-Up in PWM Mode or Async Step-Up in Pulse Frequency Mode

2. CH2 Current Mode Sync Step-Up/Down

3. CH3/CH4/CH5 Current Mode Sync Step-Down

4. SW4 Load Switch with Soft-Start Inrush Control And Current Limit

5. CH6 Generic Low Voltage LDO for CMOS Sensor

6. CH7 WLED Driver in Async Step-Up Mode

7. Open LED Protection

8. 32 Dimming Levels

Pinouts:

 

Applications:

1. Digital Cameras

2. Portable Instruments

 

RT5035A PDF Datasheet