SLMA002 datasheet(37/46 Pages) TI1

Part #	SLMA002

Description	3-A DUAL NON-SYNCHRONOUS CONVERTER WITH INTEGRATED HIGH-SIDE MOSFET AND EXTERNAL COMPENSATION

PDF	46 Pages

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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37 / 46 page

Example 2: Cascading Configuration: 24 V to 12 V at 2 A then 3.3 V at 2 A

1.0

0.5

2.0

1.5

2.5

LOAD

– Load Current – A

100

OUT

= 3.3 V

3.3

OUT

(V)

OUT

= 12 V

TPS55383

,, TPS55386

www.ti.com ......................................................................................................................................................................................... SLUS818 – SEPTEMBER 2008

This example illustrates a cascaded configuration. To accommodate the low duty cycle of a 24-V to 3.3-V supply,

PVDD1 is connected to VOUT2, a 12-V output. VOUT2 is used as the source supply for VOUT1. The sequence

pin is connected to BP, ensuring the 12-V supply is in regulation before the 3.3-V is allowed to turn on.

Figure 36. Design Example 2, TPS55386 in a Cascaded Configuration

EFFICIENCY

LOAD CURRENT

Figure 37.

Figure 38. Design Example 2 Outputs and Switch Nodes

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Product Folder Link(s): TPS55383 TPS55386

SLMA002 Datasheet(PDF) 37 Page - Texas Instruments

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