LM2596S-ADJ TO-263 SMD Package
DataSheet
SIMPLE SWITCHER® Power Converter 150 kHz 3A Step-Down Voltage Regulator
 Features:
- Adjustable output version ±4% max over line and load conditions
- Guaranteed 3A output current
- Input voltage range up to 40V
- Requires only 4 external components
- Excellent line and load regulation specifications
- 150 kHz fixed frequency internal oscillator
- TTL shutdown capability
- Low power standby mode IQ typically 80 μA
- High efficiency
- Uses readily available standard inductors
- Thermal shutdown and current limit protection
Applications
- Simple high-efficiency step-down (buck) regulator
- Efficient pre-regulator for linear regulators
- On-card switching regulators
- Positive to negative converter (Buck-Boost)
|
Specificatons:
| Standard Package |
500 / Rell |
| Family |
DC DC Switching Regulators |
| Series |
SIMPLE SWITCHER® |
| Type |
Step-Down (Buck) |
| Output Type |
ADJ |
| Number of Outputs |
1 |
| Voltage - Output |
adjustable |
| Voltage - Input |
4.5 V ~ 40 V |
| PWM Type |
Voltage Mode |
| Frequency - Switching |
150 kHz |
| Current - Output |
3A |
| Operating Temperature |
-40°C ~ 125°C |
| Mounting Type |
Surface Mount |
| Package / Case |
TO-263-6 (5 Leads + Tab) |
| Supplier Device Package |
TO-263-5 |
|
Description
The LM2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation†, and a fixed-frequency oscillator. The LM2596 series operates at a switching frequency of 150 kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 surface mount package. A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 μA standby current.Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions