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SM8172A 数据表(PDF) 11 Page - Nippon Precision Circuits Inc |
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SM8172A 数据表(HTML) 11 Page - Nippon Precision Circuits Inc |
11 / 17 page SM8172A SEIKO NPC CORPORATION —11 12-7. Standby Mode When both ENDCO and ENLDO are LOW, the device switches to standby mode, and all the RESETN, con- verter, and regulator outputs stop. 12-8. Timing Diagrams 12-8-1. Supply Voltage (VIN1 = VIN2 = ENDCO = ENLDO) *1. A time interval example for a typical application circuit with no load. The series regulator and DC/DC converter output voltage rise times may vary with the load current, output capacitance, and other conditions. *2. The soft start time is the interval during which the output current is limited internally in the IC, and is different from the series regulator and DC/DC con- verter output raise time. Note. When the supply voltage is below approximately 0.8V, there is insufficient drive for the IC to operate normally and the RESETN output level is unde- fined. Normally, a pull-up resistor is connected to RESETN, which sets the RESETN output level to pull-up voltage. VIN1 VIN2 ENABLE VRESETN (Pull-up) VDCOUT VLDOUT VRESETNH VRESETNL VUVLOH VUVLOL DC/DC, regulator output permission DC/DC, regulator output stop by UVLO lockout LDOUT (regulator output) DCOUT (DC/DC output) 70 µsec (typ) DC/DC soft start time 0.6msec (typ) *1 LDO soft start time 1msec (typ) *2 *2 800 µsec (typ)*1 Reset return delay time 65msec (typ) |
类似零件编号 - SM8172A |
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类似说明 - SM8172A |
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