Part Number: MAX682

Function: 5.5 V, 250 mA, 1300 kHz, Charge Pump Switching Regulator

Package: SOIC-8 Pin Type

Manufacturer: Maxim Integrated

Pinouts:

 

Description

The MAX682 / MAX683 / MAX684 charge-pump regulators generate 5V from a 2.7V to 5.5V input. They are specifically designed to serve as high-efficiency auxiliary supplies in applications that demand a compact design. The MAX682, MAX683, and MAX684 deliver 250mA, 100mA, and 50mA output current, respectively.

These complete 5V regulators require only one resistor and three external capacitors—no inductors are need ed. High switching frequencies (externally adjustable up to 2MHz) and a unique regulation scheme allow the use of capacitors as small as 1µF per 100mA of output current. The MAX683/MAX684 are offered in a space saving 8-pin µMAX package that is only 1.1mm high, while the MAX682 is available in an 8-pin SO.

 

Features

1. 1.1mm Height in µMAX Package (MAX683/MAX684)

2. Up to 250mA Output Current (MAX682)

3. Regulated ±4% Output Voltage

4. 50kHz to 2MHz Adjustable Switching Frequency

 

Applications:

1. Flash Memory Supplies

2. Battery-Powered Applications

3. Miniature Equipment

4. PCMCIA Cards

 

Other data sheets are available within the file:

MAX682ESA+, MAX682ESA, MAX683, MAX683EUA, MAX684

 

MAX682 Datasheet PDF Download

Part Number: LM5007

Function: High Voltage (80V) Step Down Switching Regulator

Package: VSSOP-8 and WSON-8 (4mm x 4mm) Type

Manufacturer: Texas Instruments

Pinouts:

 

Description

The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80 V, 0.7A N-Channel Buck Switch. The device is easy to apply and is provided in the VSSOP-8 and the thermally enhanced WSON-8 packages. The regulator is based on a hysteretic control scheme using an on time inverselyproportional to Vin  This feature allows the operating frequency to remain relatively constant with load and input voltage variations. The hysteretic control requires no control loop compensation, while providing very fast load transient response. An intelligent current limit is implemented in the LM5007 with forced off time that is inversely proportional to Vout. This current limiting scheme reduces load current foldback. Additional protection features include: Thermal Shutdown, Vcc undervoltage lockout, gate drive undervoltage lockout, and Max Duty Cycle limiter.

Features

• Integrated 80V, 0.7A N-Channel Buck Switch
• Internal HV Vcc Regulator
• No Control Loop Compensation Required
• Ultra-Fast Transient Response
• On Time Varies Inversely with Line Voltage
• Operating Frequency Nearly Constant with Varying Line Voltage
• Adjustable Output Voltage
• Highly Efficient Operation
• Precision Reference
• Low Bias Current
• Intelligent Current Limit Protection
• Thermal Shutdown
• External Shutdown Control
• VSSOP-8 and WSON-8 (4mm x 4mm) Packages

Applications:

• Non-Isolated DC/DC Buck Regulator
• Secondary High-Voltage Post Regulator

Other data sheets are available within the file:

LM5007MM, LM5007MM/NOPB, LM5007MMX/NOPB, LM5007SD

 

LM5007 Datasheet PDF Download