NEX40400
4.5 V to 40 V, 600 mA, synchronous step-down converter
The NEX40400 is a high efficiency step-down converter with low operating quiescent current of typically 60 µA. It provides up to 600 mA 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 ultra-low shutdown supply current allows use in battery-powered 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 comes in a cost-effective 6 leads SOT8061-1 (TSOT23-6) plastic, surface-mounted package with 2.9 mm x 1.6 mm body dimensions.
Features and benefits
- 4.5 V to 40 V wide input voltage range
- 600 mA 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 compensation
- Short circuit protection with Hiccup mode
- SOT8061-1 (TSOT23-6) 6 leads, plastic surface-mounted package
Target applications
- Industrial distributed power systems
- Grid infrastructure: Smart E-meter
- Battery powered home appliances
- White goods
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| NEX40400ADA | NEX40400ADAZ (935691873342) |
Active | N4A |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
| NEX40400BDA | NEX40400BDAZ (935691874342) |
Active | N4B |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
| NEX40400CDA | NEX40400CDAZ (935691875342) |
Active | N4C |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
| NEX40400DDA | NEX40400DDAZ (935691876342) |
Active | N4D |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
| NEX40400EDA | NEX40400EDAZ (935691877342) |
Active | N4E |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
| NEX40400FDA | NEX40400FDAZ (935691878342) |
Active | N4F |
TSOT23-6 (SOT8061-1) |
SOT8061-1 |
REFLOW_BG-BD-1
|
SOT8061-1_342 |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| NEX40400ADA | NEX40400ADAZ | NEX40400ADA |
|
|
| NEX40400BDA | NEX40400BDAZ | NEX40400BDA |
|
|
| NEX40400CDA | NEX40400CDAZ | NEX40400CDA |
|
|
| NEX40400DDA | NEX40400DDAZ | NEX40400DDA |
|
|
| NEX40400EDA | NEX40400EDAZ | NEX40400EDA |
|
|
| NEX40400FDA | NEX40400FDAZ | NEX40400FDA |
|
|
Documentation (5)
| File name | Title | Type | Date |
|---|---|---|---|
| NEX40400 | 4.5 V to 40 V, 600 mA, synchronous step-down converter | Data sheet | 2025-04-18 |
| AN90063 | Questions about package outline drawings | Application note | 2025-06-13 |
| leaflet_NEX40400_synchronous_step_down_converter | leaflet_NEX40400_synchronous_step_down_converter | Leaflet | 2025-01-13 |
| SOT8061-1 | Plastic, surface-mounted package (TSOT23-6); 6 leads | Package information | 2024-09-18 |
| REFLOW_BG-BD-1 | Reflow soldering profile | Reflow soldering | 2021-04-06 |
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