BD95500MUV Datasheet, PDF (11/21 Pages) Rohm – Switching Regulator with MOSFET for DDR-SDRAM Cores

BD95500MUV
・Output Over Voltage Protection
VOUT
REF×1.2
HG
LG
Switching
・Over current protection circuit
tON
tON
HG
tMAX tON
LG
ILIMIT
IL
Technical Note
When output rise to or above REF×1.2, output over
voltage protection is exercised, and low side FET goes
up maximum for reducing output. （LG=High, HG=Low）.
When output falls, it returns to the standard mode.
During the normal operation, when VOUT becomes less
than REF Voltage, HG becomes High during the time tON
(P9). However, when inductor current exceeds I_LIMIT
threshold, HG becomes OFF.
After MAX ON TIME, HG becomes ON again if the output
voltage is lower than the specific voltage level and I_L is
lower than I_LIMIT level.
・Synchronous operation with external power supply
3.3V (External Power Supply)
1.5 V (BD95500 Output 1)
These power supply sequences are realized to connect
SS pin to other power supply output through the
resistance (10kΩ).
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11/20
2010.05 - Rev.C