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SPM1006 Datasheet(PDF) 14 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) 14 Page - Sumida Corporation

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SPM1006
Version 1.5
March 16, 2016
Page 14 of 22
Input and Output Capacitance
Recommended minimum capacitance is 47μF ceramic (input) and 150μF ceramic (output). Additional capacitors can
be connected in parallel if required, to reduce output ripple and improve transient response.
Application Schematics
Fig. 21 shows a typical application schematic for 12V input and 3.3V output. Startup voltage is set to 9V using the
resistor REN, with value 9.76 kΩ. If required, a MOSFET can also be connected to the EN pin, as shown in Fig. 15 to
provide on-off control.
Fig. 21 Typical schematic for VIN = 12V, VOUT = 3.3V with start-up voltage set to 9V
Sequencing Operation
The term sequencing is used when two or more separate modules are configured to start one after the other, in
sequence.
Sequencing operation between two or more SPM1006 power modules can be implemented with PWRGD pin and EN
pin. Fig. 22 shows an example configuration when one SPM1006 (set to 5V) starts first and a second SPM1006 (set to
3.3V) starts after the output voltage of the first SPM1006 has reached 5V. In this case, the Power Good signal (PWRGD)
of the first module turns on the second module through the EN pin.
Fig. 23 shows the output voltage waveforms of two SPM1006 modules used in sequential start-up mode. It shows that
PWRGD signal becomes high when the first SPM1006 enters into regulation, and then the second SPM1006 starts up.
Note: The SPM1006 can start in sequence with another SPM1006 or with any other POL having a compatible Power
Good output. All Sumida power modules are fully compatible and can operate in sequence.
VOUT
3.3V
PVIN
4V to 28V
CIN1
2×47µF
CIN2
68µF
COUT1
4×47µF
EN
VAUX
SENSE
PGND
PWRGD
VADJ
VOUT
PVIN
AGND
SPM1006
PHASE
RPROG
2.21k
REN
9.76k


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