LM3370 datasheet(3/33 Pages) TI1

Part #	LM3370

Description	Dual Synchronous Step-Down DC-DC Converter

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Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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1

2

3

4

13

14

15

16

VIN2

SW2

PGND2

VDD

FB2

EN2

EN1

nPOR2

5

12

SGND

nPOR1

6

7

8

10

11

9

PGND1

SW1

VIN1

FB1

SDA

SCL

LM3370

www.ti.com

SNVS406N – NOVEMBER 2005 – REVISED MAY 2013

Figure 1. WSON Connection Diagram

(See Package Number NHR0016B)

PIN DESCRIPTIONS (WSON)

Pin #

Name

Description

1

VIN2

Power supply voltage input to PFET and NFET switches for Buck 2

2

SW2

Buck 2 Switch Pin

3

PGND2

Buck 2 Power Ground

4

VDD

Signal supply voltage input, VDD must be equal or greater of the two inputs (VIN1 and VIN2)

5

SGND

Signal GND

6

PGND1

Buck 1 Power Ground

7

SW1

Buck 1 Switch Pin

8

VIN1

Power supply voltage input to PFET and NFET switches for Buck 1

9

FB1

Analog Feedback Input for Buck 1

10

SDA

I2C-Compatible Data, a 2 k

Ω pull up resistor is required

11

SCL

I2C-Compatible Clock, a 2 k

Ω pull up resistor is required

Power ON Reset for Buck 1, Open drain output Low when Buck 1 output is 92% of target

12

nPOR1

output. A 100 k

Ω pull up resistor is required

Power ON Reset for Buck 2, Open drain output Low when Buck 2 output is 92% of target

13

nPOR2

output. A 100 k

Ω pull up resistor is required

14

EN1

Buck 1 Enable

15

EN2

Buck 2 Enable

16

FB2

Analog feedback for Buck 2

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