Packaging information
| Package | Pins HSOIC (DDA) | 8 |
| Operating temperature range (°C) -40 to 150 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the LM5168
- Functional Safety-Capable
- Designed for reliability in rugged applications
- Wide input voltage range of 6V to 120V absolute maximum
- Junction temperature range: –40°C to +150°C
- Fixed 3ms internal soft-start timer
- Peak and valley current-limit protection
- Input UVLO and thermal shutdown protection
- Designed for
scalable industrial power supplies and battery packs
- Low minimum on and off times of 50ns
- Adjustable switching frequency up to 1MHz
- Diode emulation for high light-load efficiency
- Auto mode with low quiescent current (< 10µA)
- FPWM for Fly-Buck converter capability
- 3µA shutdown quiescent current
- Pin-to-pin compatible with LM5164-Q1, LM5163-Q1, and LM5013-Q1
- Similar pinout and functionality to LM5017 and LM34927.
- Integration reduces design size
and cost
- COT mode control architecture
- Integrated 1.9Ω NFET buck switch
- Integrated 0.71Ω NFET synchronous rectifier
- 1.2V internal voltage reference
- No loop compensation components
- Internal VCC bias regulator and boot diode
- Open-drain power-good indicator
- Package options: SOIC PowerPAD™-8 integrated circuit package or WSON-8 package
Description for the LM5168
The LM5169 and LM5168 synchronous buck converters are designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on time of 50ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48V nominal input to low-voltage rails for reduced system complexity and design cost. The LM516x operates during input voltage dips as low as 6V, at nearly 100% duty cycle if needed, making the device an excellent choice for wide input supply range industrial and high cell count battery pack applications.
With integrated high-side and low-side power MOSFETs, the LM5169 delivers up to 0.65A of output current and the LM5168 delivers up to 0.3A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. The LM516x is available in FPWM or auto mode versions. FPWM mode provides forced CCM operation across the entire load range supporting isolated Fly-Buck converter applications. Auto mode enables ultra-low IQ and diode emulation mode operation for high light-load efficiency.