LT1933
PRODUCTION600mA, 500kHz Step-Down Switching Regulator in SOT-23 and DFN Packages
- Part Models
- 10
- 1ku List Price
- Starting From $3.28
Overview
- Wide Input Range: 3.6V to 36V
- 5V at 600mA from 16V to 36V Input
- 3.3V at 600mA from 12V to 36V Input
- 5V at 500mA from 6.3V to 36V Input
- 3.3V at 500mA from 4.5V to 36V Input
- Fixed Frequency 500kHz Operation
- Uses Tiny Capacitors and Inductors
- Soft-Start
- Internally Compensated
- Low Shutdown Current: <2µA
- Output Adjustable Down to 1.25V
- Low Profile (1mm) SOT-23 (ThinSOT™) and (2mm × 3mm × 0.75mm) 6-Pin DFN Packages
The LT1933 is a current mode PWM step-down DC/DC converter with an internal 0.75A power switch, packaged in a tiny 6-lead SOT-23. The wide input range of 3.6V to 36V makes the LT1933 suitable for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.
Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start up. The low current (<2µA) shutdown provides output disconnect, enabling easy power management in battery-powered systems.
Applications
- Automotive Battery Regulation
- Industrial Control Supplies
- Wall Transformer Regulation
- Distributed Supply Regulation
- Battery-Powered Equipment
Documentation
Data Sheet 1
User Guide 2
Design Note 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT1933ES6#TRMPBF | 6-Lead TSOT-23 | ||
| LT1933ES6#TRPBF | 6-Lead TSOT-23 | ||
| LT1933HDCB#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LT1933HDCB#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LT1933HS6#TRMPBF | 6-Lead TSOT-23 | ||
| LT1933HS6#TRPBF | 6-Lead TSOT-23 | ||
| LT1933IDCB#TRMPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LT1933IDCB#TRPBF | 6-Lead DFN (2mm x 3mm w/ EP) | ||
| LT1933IS6#TRMPBF | 6-Lead TSOT-23 | ||
| LT1933IS6#TRPBF | 6-Lead TSOT-23 |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4359 | RECOMMENDED FOR NEW DESIGNS | Ideal Diode Controller with Reverse Input Protection |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT1933
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
