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MAX638 Step-Down Switching Regulator Datasheet
Photograph
Product Details
The MAX638 is a low-power, step-down dc-dc converter supplying a
regulated 5V output.
The MAX638 requires only a few external components and can fit in a small pcb footprint.
Low voltage detection is included on the chip.
The MAX638 has a high efficiency of 85% and is ideal for battery operated equipment.
Features
- Fixed +5V Output
- Adjustable Output with 2 Resistors
- Low Operating Current
- 3 External Components
- 85% Typical Efficiency
- Low Battery Detector
Pin Layout
Pin Description
| Pin Number | Description |
|---|---|
| 1 | Vout - Output Voltage |
| 2 | LBO - Low Battery Detector Output |
| 3 | LBI - Low Battery Detector Input |
| 4 | GND - Ground |
| 5 | Lx - MOSFET Drain |
| 6 | Vs+ - Positive Supply Voltage |
| 7 | Vfb - Voltage Feedback |
| 8 | COMP - Compensation Input |
Dimensional Drawing
Technical Data
