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MIC7401-XXXXYFL: 产品描述Power Supply Support Circuit; 产品类别电源/电源管理电源电路; 文件大小6MB，共68页; 制造商Microchip(微芯科技); 官网地址https://www.microchip.com

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MIC7401-XXXXYFL概述

Power Supply Support Circuit

MIC7401-XXXXYFL规格参数

参数名称	属性值
厂商名称	Microchip(微芯科技)
包装说明	,
Reach Compliance Code	compliant
模拟集成电路 - 其他类型	POWER SUPPLY SUPPORT CIRCUIT
Base Number Matches	1

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MIC7401

Configurable PMIC, Five-Channel

Buck Regulator plus One-Boost with

HyperLight Load

®

, I

2

C Control, and Enable

General Description

The MIC7401 is a powerful, highly-integrated,

configurable, power-management IC (PMIC) featuring five

synchronous buck regulators, one boost regulator, and

high-speed I

2

C interface with an internal EEPROM.

The device offers two distinct modes of operation “stand-

by mode” and “normal mode” intended to provide an

energy optimized solution suitable for portable handheld,

and infotainment applications.

In normal mode, the programmable switching converters

can be configured to support a variety of features,

including start-up sequencing, timing, soft-start ramp,

output voltage levels, current-limit levels, and output

discharge for each channel.

In stand-by mode the PMIC can configured in a low power

state by either disabling an output or by changing the

output voltage to a lower level. Independent exit from

stand-by mode can be achieved either by I

2

C

communication or the external STBY pin.

The device has five synchronous buck regulators with

high-speed adaptive on-time control supporting even the

challenging ultra-fast transient requirement for core

supplies. The one boost regulator provides a flash-memory

programming supply that delivers up to 200mA of output

current. The boost is equipped with an output disconnect

switch that opens if a short-to-ground fault is detected.

An internal EEPROM enables a single-chip solution across

many platforms by allowing the designer to customize the

PMIC for their design. Modifications can be made without

the need to re-approve a new PMIC, saving valuable

design resources and time.

All switchers provide light-load efficiency with HyperLight

Load

®

mode for buck and PFM mode for boost. An

additional benefit of this proprietary architecture is very-low

output ripple voltage throughout the entire load range with

the use of small output capacitors. The MIC7401 is

designed for use with a small inductors (down to 0.47µH

for buck, 1.5µH for boost), and an output capacitor as

small as 10µF for buck, enabling a total solution size of

12mm × 8.5mm and less than 1mm height on top layer.

The datasheet and other support documentation can be

found on Micrel’s web site at:

www.micrel.com.

HyperLight Load is a registered trademark of Micrel, Inc.

Features



















Input voltage: 2.4V to 5.5V

Five independent synchronous bucks up to 3A

One independent non-synchronous boost 200mA

200µA quiescent current (all regulators on)

5µA typical shutdown current

93% peak buck efficiency, 85% typical efficiency at 1mA

Dual power mode: stand-by and normal mode

I²C interface up to 3.4MHz

I²C on-the-fly EEPROM programmability, featuring:



Buck and boost output voltage scaling



Power-on-Reset (PoR) threshold and delay



Power-up sequencing/sequencing delay



Buck and boost current limit



Buck and boost pull-down when disabled



Individual ON, OFF, and standby modes



Soft-start and global power-good masking

23µA buck typical quiescent current

70µA boost typical quiescent current

1.5% output accuracy over temperature/line/load

2.0MHz boost switching frequency

1.3MHz buck operation in continuous mode

Ultra-fast buck transient response

12mm × 8.5mm × 1.25mm solution size (top layer)

Thermal-shutdown and current-limit protection

36-pin 4.5mm × 4.5mm × 0.85mm FQFN package

(0.4mm pitch)

40C

to +125C junction temperature range





















Applications















Client and enterprise solid state drives (SSD)

Consumer and in-vehicle infotainment devices

Multimedia devices

Portable handheld devices

Security camera

Gaming machines

Service provider gateways

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •

http://www.micrel.com

March 16, 2015

Revision 1.0

Micrel, Inc.

MIC7401

Table of Contents

General Description ................................................................................................................................................................ 1

Features .................................................................................................................................................................................. 1

Applications ............................................................................................................................................................................. 1

Typical Application .................................................................................................................................................................. 2

Ordering Information ............................................................................................................................................................... 2

Table of Contents .................................................................................................................................................................... 3

List of Figures .......................................................................................................................................................................... 5

List of Tables ........................................................................................................................................................................... 6

Pin Configuration ..................................................................................................................................................................... 6

Pin Description ........................................................................................................................................................................ 7

Absolute Maximum Ratings .................................................................................................................................................. 10

Operating Ratings ................................................................................................................................................................. 10

Electrical Characteristics ....................................................................................................................................................... 10

Typical Characteristics .......................................................................................................................................................... 15

Functional Characteristics ..................................................................................................................................................... 17

MIC7401 Block Diagram ....................................................................................................................................................... 24

Functional Description ........................................................................................................................................................... 25

Programmable Buck Soft-Start Control ............................................................................................................................. 25

Buck Digital Voltage Control (DVC) ................................................................................................................................... 26

Programmable Boost Soft-Start Control ............................................................................................................................ 27

Boost Digital Voltage Control (DVC) ................................................................................................................................. 28

Buck Current Limit ............................................................................................................................................................. 28

Boost Current Limit ............................................................................................................................................................ 29

Global Power Good Pin ..................................................................................................................................................... 29

Standard Delay .................................................................................................................................................................. 29

Power-Up Sequencing ....................................................................................................................................................... 29

Programmable Power-on-Reset (POR) Delay .................................................................................................................. 30

Power-Down Sequencing .................................................................................................................................................. 30

Stand-By Mode .................................................................................................................................................................. 31

Resistive Discharge ........................................................................................................................................................... 31

STBY Pin ........................................................................................................................................................................... 31

Safe Start-Up into a Pre-Biased Output ............................................................................................................................ 32

Buck Regulator Power Dissipation .................................................................................................................................... 32

Total Power Dissipation ..................................................................................................................................................... 32

Power Derating .................................................................................................................................................................. 33

Overtemperature Fault ...................................................................................................................................................... 33

Input Voltage “Hot-Plug” .................................................................................................................................................... 34

Thermal Measurements ..................................................................................................................................................... 34

March 16, 2015

3

Revision 1.0

Micrel, Inc.

MIC7401

Table of Contents (Continued)

Timing Diagrams ................................................................................................................................................................... 35

Normal Power-Up Sequence for Outputs .......................................................................................................................... 35

Standby (STBY) Pin (Wake-Up)............................................................................................................................................ 36

Evaluation Board Schematic ................................................................................................................................................. 37

Bill of Materials ...................................................................................................................................................................... 38

PCB Layout Guidelines ......................................................................................................................................................... 39

General .............................................................................................................................................................................. 39

IC ....................................................................................................................................................................................... 39

Input Capacitor .................................................................................................................................................................. 39

Inductor .............................................................................................................................................................................. 39

Output Capacitor ............................................................................................................................................................... 39

Proper Termination of Unused Pins ...................................................................................................................................... 40

PCB Layout Recommendations ............................................................................................................................................ 41

Package Information

(17)

and Recommended Landing Pattern .............................................................................................. 45

Via Layout Design and Layout Constraints ........................................................................................................................... 46

Appendix A ............................................................................................................................................................................ 47

I C Control Register ........................................................................................................................................................... 47

Serial Port Operation ......................................................................................................................................................... 47

External Host Interface .................................................................................................................................................. 47

Special Host I C Commands ......................................................................................................................................... 48

Special Keys .................................................................................................................................................................. 48

Appendix B ............................................................................................................................................................................ 49

Register Settings Descriptions .......................................................................................................................................... 49

Power Good Register (00’h) .......................................................................................................................................... 49

EEPROM-Ready Register (01’h) ................................................................................................................................... 50

Fault Registers (02’h) ..................................................................................................................................................... 51

Standby Register (03’h) ..................................................................................................................................................... 52

Enable/Disable Register (04’h) .......................................................................................................................................... 53

Regulator Output Voltage Setting NORMAL Mode (05’h

−

09’h) ...................................................................................... 54

Boost Regulator Output Voltage Setting NORMAL Mode (0A’h) ...................................................................................... 55

Regulator Voltage Setting STBY Mode (0B’h – 0F’h) ....................................................................................................... 56

Boost Regulator Output Voltage Setting STBY Mode (10’h) ............................................................................................. 57

Sequence Register (11’h) .................................................................................................................................................. 58

Delay Register (17’h) ......................................................................................................................................................... 61

Soft-Start Registers (18’h

−

1A’h) ...................................................................................................................................... 62

Current-Limit (Normal Mode) Registers (1B’h

−

1D’h) ...................................................................................................... 63

Current-Limit (STBY Mode) Registers (1E

−

20’h) ............................................................................................................ 65

Power-on-Reset (POR) Threshold Voltage Setting Register (21’h and 22’h) ................................................................... 66

Pull-Down when Disabled Register (23’h) ......................................................................................................................... 67

March 16, 2015

4

Revision 1.0

2

2

Micrel, Inc.

MIC7401

List of Figures

Figure 1. Buck Soft-Start ..................................................................................................................................................... 25

Figure 2. Buck Soft-Start ..................................................................................................................................................... 26

Figure 3. Buck DVC Control Ramp ..................................................................................................................................... 26

Figure 4. Buck DVC Control Ramp ..................................................................................................................................... 27

Figure 5. Boost Soft-Start Ramp ......................................................................................................................................... 27

Figure 6. Boost Soft-Start.................................................................................................................................................... 27

Figure 7. Boost DVC Control Ramp .................................................................................................................................... 28

Figure 8. Standard Delay Time ........................................................................................................................................... 29

Figure 9. Hot Plug

−

V

IN

Rising ........................................................................................................................................... 30

Figure 10. POR ..................................................................................................................................................................... 30

Figure 11. Hot Un-Plug

−

V

IN

Falling ..................................................................................................................................... 30

Figure 12. I C Stand-By Mode .............................................................................................................................................. 31

Figure 13. Output Pull-Down Resistance .............................................................................................................................. 31

Figure 14. STBY-to-NORMAL Transition (DEFAULT) .......................................................................................................... 32

Figure 15. Pre-Biased Output Voltage .................................................................................................................................. 32

Figure 16. Power Dissipation ................................................................................................................................................ 33

Figure 17. Power Derating Curve.......................................................................................................................................... 33

Figure 18. Hot-Plug Input Voltage Spike............................................................................................................................... 34

Figure 19. MIC7401 Power-Up/-Down .................................................................................................................................. 35

Figure 20. MIC7401 STBY Function (DEFAULT) ................................................................................................................. 36

Figure 21. Connections for Unused Pins .............................................................................................................................. 40

Figure 22. Read/Write Protocol ............................................................................................................................................. 47

2

March 16, 2015

5

Revision 1.0

MIC7401-XXXXYFL相似产品对比

	MIC7401-XXXXYFL	MIC7401YFL
描述	Power Supply Support Circuit	Power Supply Support Circuit
厂商名称	Microchip(微芯科技)	Microchip(微芯科技)
Reach Compliance Code	compliant	compliant
模拟集成电路 - 其他类型	POWER SUPPLY SUPPORT CIRCUIT	POWER SUPPLY SUPPORT CIRCUIT
Base Number Matches	1	1

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迅速准确量测待机电流的新款直流电源供应器

安捷伦科技(Agilent Technologies)近日推出两款适用于Agilent N6700模块式电源系统系列的模块，可快速又准确地量测待测装置(DUT)的微安培电流。在自动化测试设备(ATE)系统中，这些电源供应器可让测试工程师在几毫秒内准确地量测到微安培电流，因而提高ATE系统的速度。安捷伦N6700系列电源供应器加上微安培电流量测技术，在高电流下可拥有快速的瞬时响应能力，...[详细]

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