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SPM1006 Datasheet(PDF) 11 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) 11 Page - Sumida Corporation

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SPM1006
Version 1.5
March 16, 2016
Page 11 of 22
Fig. 14 Output Voltage Trim Circuit
Enable (EN) Control
The EN pin provides an electrical on/off control of the power module. Once the voltage at the EN pin exceeds the
threshold voltage (0.8V) or is left open, the power module starts operation when the input voltage is higher than the
input start up voltage (VSTART).
When the voltage at EN pin is pulled below the threshold voltage, the switching converter stops switching and the
power module enters low quiescent current state.
If an application requires controlling the EN pin, an open drain or open collector output logic can be used to interface
with the pin, as shown in Fig. 15, where high ON/OFF signal (low EN) disables the power module.
Fig. 15 Typical ON/OFF Control
When EN pin is open (or connected to a logic high voltage), SPM1006 produces a regulated output voltage following
the application of a valid input voltage. Fig. 16 shows the startup waveform for SPM1006 without EN control. The top
trace is input voltage, the middle trace is Power Good signal (PWRGD), and the bottom trace is the output voltage.
VADJ
VSENSE
R1
RPROG
VOUT
COUT
0.6V
SPM1006
VOUT
AGND
PGND
RTRIM
ON/OFF
Signal
Q1
EN
PGND
SPM1006


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