Device Overview
LM2596S-ADJ/NOPB is the adjustable, 5-pin KTT TO-263 surface-mount orderable of TI’s LM2596 SIMPLE SWITCHER buck-regulator family. It operates from 4.5 V to 40 V, can support a 3 A load, and uses a fixed 150 kHz internal oscillator. The adjustable version covers 1.2 V to 37 V output settings rather than the fixed 3.3 V, 5 V, or 12 V options in the same family.
Confirmed Technical and Ordering Data
| Parameter | Confirmed value | Scope / condition |
|---|---|---|
| Device Function | Adjustable SIMPLE SWITCHER step-down buck regulator | |
| Input Voltage | 4.5 to 40 V | operating input range |
| Output Voltage Or Range | 1.2 to 37 V | adjustable-version output range; maximum specification is +/-4% over line and load conditions |
| Current Rating | 3 A | output load-current capability; thermal design and input/output conditions apply |
| Switching Frequency | 150 kHz | fixed internal oscillator |
| Standby Current | 80 uA | typical low-power standby-mode IQ |
| Control Interface | TTL-compatible shutdown / ON-OFF control | |
| Protection Features | Thermal shutdown and current-limit protection | |
| Package | TO-263-5 (KTT) | exact orderable/package form |
| Temperature Range | -40 to 125 °C | exact orderable or manufacturer family grade |
Engineering Selection Guidance
The exact S-ADJ/NOPB suffix is important because it selects both the adjustable feedback version and the TO-263 package. TI specifies the adjustable output range with a maximum +/-4% line-and-load condition, so the feedback divider and system tolerance should be designed around that limit rather than a nominal setpoint alone. The 3 A rating still requires adequate thermal design and suitable input/output differential conditions. TTL-compatible shutdown, thermal shutdown, and current-limit protection are integrated. TI also identifies newer alternatives on the family page, but the LM2596 itself remains active; a redesign can therefore weigh legacy ecosystem familiarity against newer converters with higher switching frequency or lower quiescent current.
Procurement Notes
Manufacturer lifecycle/status evidence for this exact orderable is recorded as ACTIVE. Package identity is TO-263-5 (KTT). Confirm final availability, lot/date-code requirements, and commercial terms through the RFQ process.
Lifecycle status does not indicate HKEQGOO stock, lead time, MOQ, or final availability.
For a fixed 5-V output instead of the adjustable-output LM2596 configuration, compare LM2596SX-5.0/NOPB. Both are 3-A LM2596-family regulators in TO-263-5 (KTT), but the fixed-voltage and adjustable versions use different output-setting circuitry; confirm the external design before changing the orderable part.
