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AS1346-49

Datasheet - Detailed Description

8 Detailed Description

The AS1346, AS1347, AS1348, AS1349 family is a high-efficiency buck converter that uses a constant-frequency current-mode architecture.

The device contains two internal MOSFET switches and is available with a fixed output voltage (see Ordering Information on page 15).

Figure 17. AS1346 - Block Diagram

Mosfet

Control

Logic

Shutdown

Control

Main Control

Soft Start

Current

Sense

PVIN

VDD

FB1

EN1

SW1

AGND

AS1346

Mosfet

Control

Logic

Soft Start

Oscillator

Current

Sense

FB2

EN2

PVIN

VDD

SW2

LBO

LBI

Power-OK

Compare

Logic

PGND