SMB208A datasheet(3/27 Pages) SUMMIT

Numer części	SMB208A

Szczegółowy opis	Dual Programmable Buck Regulators with Integrated MOSFETs and Digital Control

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Producent	SUMMIT [Summit Microelectronics, Inc.]

Strona internetowa	http://www.summitmicro.com

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SMB206A/7A/8A

Preliminary

SUMMIT Microelectronics, Inc.

2147 2.4 2/23/2012

3

SMB206A/7A/8A

GND

PVIN(4)

EN0

PGOOD/RESET

+4.5V to +16V

VDD

4.7uF

+0.8V to VIN @ 1A-3A

1uF

2.2uH-6.8uH

SW0(2)

4.7/10/

22uF

FB0

EN1

+0.8V to VIN @ 1A-3A

2.2uH-6.8uH

SW1(2)

4.7/10/

22uF

FB1

SCL

SDA

0.1uF

BST0

0.1uF

BST1

Internal

5V LDO

UVLO

PWM

I2C I/F

Digital

Control

NV OTP

Oscillator

Θ0

Θ1

Output

Voltage

Sequencer

Softstart

Vref

1A-3A

AVIN

SMB206A - 3A+3A

SMB207A - 1A+1A

SMB208A - 2A+2A

Optional for custom

output voltages

Optional for custom

output voltages

*Contact factory for TSSOP package

QFN-20 Pin #

TSSOP Pin #*

Pin Name

Pin Type

Pin Description

16, 17, 19, 20

3, 4, 22, 23

PVIN

Power

Power Input - Connect to +4.5V to +16V source. Bypass with 4.7uF

MLCC

18

2

AVIN

Power

Analog Power Input - Connect to +4.5V to +16V source (same as PVIN)

12

18

VDD

Power

Internal VDD - +5V internal supply. Bypass with 1uF typical MLCC

4, PAD

8, PAD

GND

Ground

Ground – Connect to PCB isolated ground

9

15

SCL

Input

I

2C Clock

10

16

SDA

I/O

I

2C Data

7,6

11, 10

EN(0/1)

Input

Enable 0/1 – Enables output, high true

14, 15, 1, 2

20, 21, 5, 6

SW0/1

Output

Switch Node 0/1 – Connect to output inductors

13, 3

19, 7

BST0/1

Input

Bootstrap Input – Connect to 0.1uF capacitor to switch node

11, 5

17, 9

FB0/1

Input

Feedback Input 0/1 – Connect to output sense node

8

14

PGOOD/

RESET

Output

PowerGood/RESET Output – Output UV monitor signal (high true, open

drain)

NA

1, 12, 13, 24

NC

Not Connected

PIN DESCRIPTION

Figure 2 - TYPICAL APPLICATION

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