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SPM1006 Datasheet(PDF) 12 Page - Sumida Corporation

Part No. SPM1006
Description  4-28V Input 8A Output Power Supply in Inductor (PSI2) Module
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Maker  SUMIDA [Sumida Corporation]
Homepage  http://www.sumida.com
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SPM1006 Datasheet(HTML) 12 Page - Sumida Corporation

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SPM1006
Version 1.5
March 16, 2016
Page 12 of 22
Fig. 16 Start-Up Waveforms for SPM1006
(set to 1.8V output) without EN control
Fig. 17 and Fig. 18 show the typical output voltage waveforms when SPM1006 is turned on and turned off by the EN
pin. In these figures, the top trace is enable signal (EN), the middle trace is Power Good signal (PWRGD), and the bottom
trace is the output voltage.
Fig. 17 Enable Turn-On for SPM1006
(set to 1.8V, with IOUT = 6A)
Fig. 18 Enable Turn-Off for SPM1006
(set to 1.8V, with IOUT = 6A)
The startup and shutdown waveforms are similar for other output voltages.
Pre-bias Startup
Some applications require startup when there is a residual pre-bias voltage on the output. The SPM1006 can start in
this condition and as long as the pre-bias voltage is lower than the final output the start-up waveform will be normal.
Fig. 19 illustrates start up with pre-bias of approximately 50% of the nominal output voltage. Fig. 20 shows the start-
up when the pre-bias is about 80% of the nominal output.


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