ZSPM4521 Datasheet

© 2016 Integrated Device Technology, Inc.

3

January 27, 2016

Contents

1

ZSPM4521 Characteristics............................................................................................................................... 5

1.1.

Absolute Maximum Ratings....................................................................................................................... 5

1.2.

Thermal Characteristics............................................................................................................................. 5

1.3.

Recommended Operating Conditions ....................................................................................................... 6

1.4.

Electrical Characteristics ........................................................................................................................... 6

1.5.

I

2C™ Interface Timing Requirements...................................................................................................... 10

2

Functional Description.................................................................................................................................... 11

2.1.

Internal Protection ................................................................................................................................... 12

2.1.1.

VIN Under-Voltage Lockout .............................................................................................................. 12

2.1.2.

Internal Current Limit ........................................................................................................................ 12

2.1.3.

Thermal Shutdown ............................................................................................................................ 12

2.1.4.

VBAT Over-Voltage Protection ......................................................................................................... 12

2.2.

Fault Handling.......................................................................................................................................... 13

2.2.1.

NFLT Pin Functionality...................................................................................................................... 13

2.2.2.

Other Faults ...................................................................................................................................... 13

2.3.

Serial Interface ........................................................................................................................................ 15

2.3.1.

I

2C™ Subaddress Definition ............................................................................................................. 15

2.3.2.

I

2C™ Bus Operation.......................................................................................................................... 15

2.4.

Status and Configuration Registers......................................................................................................... 17

3

Application Circuits ......................................................................................................................................... 22

3.1.

Typical Application Circuit ....................................................................................................................... 22

3.2.

Selection of External Components .......................................................................................................... 22

3.2.1.

COUT Output Capacitor ...................................................................................................................... 22

3.2.2.

LOUT Output Inductor ......................................................................................................................... 22

3.2.3.

CIN Bypass Capacitor for Input from Photovoltaic Source ................................................................ 22

3.2.4.

CVDD Bypass Capacitor for VDD Internal Reference Voltage Output ............................................... 23

3.2.5.

RSENSE Output Sensing Resistor ....................................................................................................... 23

3.2.6.

Pull-up Resistors ............................................................................................................................... 23

4

Pin Configuration and Package...................................................................................................................... 24

4.1.

ZSPM4521 Package Dimensions............................................................................................................ 24

4.2.

Pin-Out Assignments............................................................................................................................... 25

4.3.

Pin Description for 16-Pin PQFN (4 x 4 mm) .......................................................................................... 25

4.4.

Package Markings ................................................................................................................................... 26

5

Layout Recommendations.............................................................................................................................. 27

5.1.

Multi-Layer PCB Layout........................................................................................................................... 27

5.2.

Single-Layer PCB Layout ........................................................................................................................ 28

6

Ordering Information ...................................................................................................................................... 29

7

Related Documents........................................................................................................................................ 29

8

Document Revision History ............................................................................................................................ 30