NEX40400
NEX40400 is synchronous step-down converter manufactured by Nexperia.
4.5 V to 40 V, 600 m A, synchronous step-down converter
Rev. 1
- 6 December 2024
Product data sheet
1. General description
The NEX40400 is a high efficiency step-down converter with low operating quiescent current of typically 60 µA. It provides up to 600 m A output with current mode control for fast loop response.
The wide 4.5 V to 40 V input range is suitable for variety of the power step-down applications in industrial and automotive environments. 0.3 µA ultralow shutdown supply current allows use in batterypowered applications.
High power conversion efficiency across a wide load range is achieved by folding down the switching frequency at light load condition reducing the switching losses.
Frequency foldback helps to prevent inductor current runaway during start-up and to allow operation in both high conversion ratio and low drop-out cases. Thermal shutdown provides reliable and robust operation.
The NEX40400 es in a cost-effective 6 leads SOT8061-1 (TSOT23-6) plastic, surface-mounted package with 2.9 mm x 1.6 mm body dimensions.
2. Features and benefits
- 4.5 V to 40 V wide input voltage range
- 600 m A continuous output current
- 60 µA standby, 0.3 µA shutdown current
- 1% output voltage accuracy
- 1.05 MHz and 2.1 MHz fixed switching frequency
- Pulse Frequency Modulation (PFM) option for light load efficiency
- Frequency foldback for high conversion ratio and low drop-out applications
- Force PWM (FPWM) option for small output ripple
- Spread spectrum for better EMI
- Start-up with pre-biased output
- Precision enable
- Internal pensation
- Short circuit protection with Hiccup mode
- SOT8061-1 (TSOT23-6) 6 leads, plastic surface- mounted package
3. Target applications
- Industrial distributed power systems
- Grid infrastructure: Smart E-meter
- Battery powered home appliances
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