The STH05 series wide input voltage switching regulators, are ideally suited to 48VDC bus POL applications. With efficiency up to 92%, very little energy is wasted as heat so there is no requirement for a heatsink, giving significant space saving and providing flexibility for the PCB design.
These non-isolated DC-DC converters offer a simple step-down voltage conversion and good line/load regulation, low ripple & noise with a low quiescent current (no load) of 3mA. Remote on/off is provided by a control pin, when inhibited the input current is just 1mA. The output has continuous short circuit protection with automatic reset.
For nominal 12V, 24V or 48V, the input range extends from 9.0 to 72VDC for outputs of 3.3, 5.0 & 6.5VDC 0.5A; for nominal 24 & 48VDC, the input range extends from 14 to 72VDC for outputs of 7.2 & 9.0VDC 0.5A and 17 to 72VDC for 12VDC 0.5A output; for nominal 48VDC, the input range extends from 21 to 72VDC for the 15VDC 0.4A output. All models feature a ±10% output trim by external resistor.
Standards include: EN55032 Class B conducted and radiated for EMC emissions (ITE) with minimal external filtering; EN61000-4-2,3,4,5,6,8 for EMC immunity. The SMD-10 package measures 0.77” x 0.47” x 0.2” (19.5 x 11.8 x 5.0 mm). The operating temperature range is -40°C to +105°C with full power to a minimum of +65°C, calculated MTBF is greater than 4.8Mhrs (MIL-HDBK-217F, +25°C).
The STH05 provide a low-cost point of load (POL) solution for: Distributed DC supply systems not needing isolation but where regulation is required; Embedded computing; Sensors; Robotics; Telecommunications; Instrumentation; Portable & battery-operated equipment.
• Regulated single outputs from 3.3 to 15VDC
• Wide input range 9/14/17/21 to 72VDC
• SMD-10 package
• Output voltage trim ±10%
• High efficiency up to 92%
• Class B conducted & radiated emissions (with external components)
• Short-circuit protection
• No heatsink required
• Remote On/Off
• Tape & reel package available
• -40°C to +105°C operating temperature
• Full power to +65°C
• MTBF> 4.8 Mhrs (MIL-HDBK-217F, +25°C GB)
• 3 year warranty