Nisshinbo R1272S032A050-0500EV Evaluation Board

Nisshinbo R1272S032A050-0500EV Evaluation Board is used to evaluate the R1272S step-down DC/DC controller. The controller can generate an output voltage of 0.7V to 5.3V by driving external high- and low-side NMOSs. The R1272S can make up a stable DC/DC converter with high efficiency even if adding low Ron MOSFETs and a low DCR inductor externally by the adoption of a unique current mode PWM architecture without an external current sense resistor.

Features

4.0V to 34V (36V) Operating Voltage (Maximum Rating)
-40°C ≤ Ta ≤ 105°C (Usable in high-temperature environment) Operating Temperature Range
4.5V Start-up Voltage
3.3V Output Voltage
0.64V ± 1% Feedback Voltage Tolerance
Typ. 15µA Consumption Current at No Load (at VFM mode)
500kHz Adjustable Oscillation Frequency
250kHz to 1MHz Synchronizable Clock Frequency
Typ. ±3.6% Spreading Rate for SSCG
Typ. 100ns Minimum On-Time
Typ. 120ns (at regulation mode) at dropout, actual minimum off-time is reduced Minimum Off-Time
Typ. 500µs Adjustable Soft-start Time

Pre-bias Start-up
Anti-phase Clock Output
Tj = 160ºC (Typ.) Thermal Shutdown Function
Typ. 3.3V Under-Voltage Lockout (UVLO) Function
FB pin voltage (VFB) + 10% (Typ.) Over Voltage Detection (OVD) Function
FB pin voltage (VFB) x 3% (Typ.) Detection/Release Hysteresis
FB pin voltage (VFB) – 10% (Typ.) Under Voltage Detection (UVD) Function
FB pin voltage (VFB) x 3% (Typ.) Detection/Release Hysteresis
Hiccup-mode / Latch mode Over-current Protection
70mV Selectable Current Limit Threshold
NMOS Open-drain Output Power Good Output
HSOP-18 Package

Nisshinbo R1272S032A050-0500EV Evaluation Board

Features

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