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SM8172A 数据表(PDF) 11 Page - Nippon Precision Circuits Inc

部件名 SM8172A
功能描述  2-output Power Supply IC
Download  17 Pages
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制造商  NPC [Nippon Precision Circuits Inc]
网页  http://www.npc.co.jp/en
标志 NPC - Nippon Precision Circuits Inc

SM8172A 数据表(HTML) 11 Page - Nippon Precision Circuits Inc

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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)


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