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LM25066 System Power Management and Protection IC With PMBus™
SNVS654J
February 2010 – December 2015
LM25066
PRODUCTION DATA.
CONTENTS
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LM25066 System Power Management and Protection IC With PMBus™
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Switching Characteristics
7.8
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Current Limit
8.3.2
Circuit Breaker
8.3.3
Power Limit
8.3.4
Undervoltage Lockout (UVLO)
8.3.5
Overvoltage Lockout (OVLO)
8.3.6
Power Good
8.3.7
VDD Sub-Regulator
8.3.8
Remote Temperature Sensing
8.3.9
Damaged MOSFET Detection
8.4
Device Functional Modes
8.4.1
Power Up Sequence
8.4.2
Gate Control
8.4.3
Fault Timer and Restart
8.4.4
Shutdown Control
8.4.5
Enabling/Disabling and Resetting
8.5
Register Maps
8.5.1
PMBus Command Support
8.5.1.1
Standard PMBus™ Commands
8.5.1.1.1
OPERATION (01h)
8.5.1.1.2
CLEAR_FAULTS (03h)
8.5.1.1.3
CAPABILITY (19h)
8.5.1.1.4
VOUT_UV_WARN_LIMIT (43h)
8.5.1.1.5
OT_FAULT_LIMIT (4Fh)
8.5.1.1.6
OT_WARN_LIMIT (51h)
8.5.1.1.7
VIN_OV_WARN_LIMIT (57h)
8.5.1.1.8
VIN_UV_WARN_LIMIT (58h)
8.5.1.1.9
STATUS_BYTE (78h)
8.5.1.1.10
STATUS_WORD (79h)
8.5.1.1.11
STATUS_VOUT (7Ah)
8.5.1.1.12
STATUS_INPUT (7Ch)
8.5.1.1.13
STATUS_TEMPERATURE (7Dh)
8.5.1.1.14
STATUS_CML (7Eh)
8.5.1.1.15
STATUS_MFR_SPECIFIC (80h)
8.5.1.1.16
READ_VIN (88h)
8.5.1.1.17
READ_VOUT (8Bh)
8.5.1.1.18
READ_TEMPERATURE_1 (8Dh)
8.5.1.1.19
MFR_ID (99h)
8.5.1.1.20
MFR_MODEL (9Ah)
8.5.1.1.21
MFR_REVISION (9Bh)
8.5.1.2
Manufacturer Specific PMBus™ Commands
8.5.1.2.1
MFR_SPECIFIC_00: READ_VAUX (D0h)
8.5.1.2.2
MFR_SPECIFIC_01: MFR_READ_IIN (D1h)
8.5.1.2.3
MFR_SPECIFIC_02: MFR_READ_PIN (D2h)
8.5.1.2.4
MFR_SPECIFIC_03: MFR_IN_OC_WARN_LIMIT (D3h)
8.5.1.2.5
MFR_SPECIFIC_04: MFR_PIN_OP_WARN_LIMIT (D4h)
8.5.1.2.6
MFR_SPECIFIC_05: READ_PIN_PEAK (D5h)
8.5.1.2.7
MFR_SPECIFIC_06: CLEAR_PIN_PEAK (D6h)
8.5.1.2.8
MFR_SPECIFIC_07: GATE_MASK (D7h)
8.5.1.2.9
MFR_SPECIFIC_08: ALERT_MASK (D8h)
8.5.1.2.10
MFR_SPECIFIC_09: DEVICE_SETUP (D9h)
8.5.1.2.11
MFR_SPECIFIC_10: BLOCK_READ (DAh)
8.5.1.2.12
MFR_SPECIFIC_11: SAMPLES_FOR_AVG (DBh)
8.5.1.2.13
MFR_SPECIFIC_12: READ_AVG_VIN (DCh)
8.5.1.2.14
MFR_SPECIFIC_13: READ_AVG_VOUT (DDh)
8.5.1.2.15
MFR_SPECIFIC_14: READ_AVG_IIN (DEh)
8.5.1.2.16
MFR_SPECIFIC_15: READ_AVG_PIN (DFh)
8.5.1.2.17
MFR_SPECIFIC_16: BLACK_BOX_READ (E0h)
8.5.1.2.18
MFR_SPECIFIC_17: READ_DIAGNOSTIC_WORD (E1h)
8.5.1.2.19
MFR_SPECIFIC_18: AVG_BLOCK_READ (E2h)
8.5.1.3
Reading and Writing Telemetry Data and Warning Thresholds
8.5.1.4
Determining Telemetry Coefficients Empirically With Linear Fit
8.5.1.5
Writing Telemetry Data
8.5.1.6
PMBus™ Address Lines (ADR0, ADR1, ADR2)
8.5.1.7
SMBA Response
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
12-V, 45-A PMBus Hotswap Design
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Select RSNS and CL Setting
9.2.1.2.2
Selecting the Hotswap FETs
9.2.1.2.3
Select Power Limit
9.2.1.2.4
Set Fault Timer
9.2.1.2.5
Check MOSFET SOA
9.2.1.2.6
Switching to dV/dt based Start-up
9.2.1.2.7
Choosing the VOUT Slew Rate
9.2.1.2.8
Select Power Limit and Fault Timer
9.2.1.2.9
Set Undervoltage and Overvoltage Threshold
9.2.1.2.9.1
Option A
9.2.1.2.9.2
Option B
9.2.1.2.9.3
Option C
9.2.1.2.9.4
Option D
9.2.1.2.10
Power Good Pin
9.2.1.2.11
Input and Output Protection
9.2.1.2.12
Final Schematic and Component Values
9.2.2
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Development Support
12.2
Community Resources
12.3
Trademarks
12.4
Electrostatic Discharge Caution
12.5
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
NHZ|24
MPQS005
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvs654j_oa
snvs654j_pm
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