ZSPM1025A Datasheet, PDF (3/45 Pages) List of Unclassifed Manufacturers – True Digital PWM Controller (Single-Phase, Single-Rail)

ZSPM1025A Datasheet
Contents
List of Figures .......................................................................................................................................................... 4
List of Tables ........................................................................................................................................................... 6
1 IC Characteristics ............................................................................................................................................. 7
1.1. Absolute Maximum Ratings....................................................................................................................... 7
1.2. Recommended Operating Conditions ....................................................................................................... 7
1.3. Electrical Parameters ................................................................................................................................ 8
2 Product Summary........................................................................................................................................... 11
2.1. Overview.................................................................................................................................................. 11
2.2. Pin Description......................................................................................................................................... 13
2.3. Available Packages ................................................................................................................................. 14
3 Functional Description .................................................................................................................................... 15
3.1. Power Supply Circuitry, Reference Decoupling, and Grounding ............................................................ 15
3.2. Reset/Start-up Behavior .......................................................................................................................... 15
3.3. Digital Power Control ............................................................................................................................... 15
3.3.1. Overview ........................................................................................................................................... 15
3.3.2. Output Voltage Feedback ................................................................................................................. 15
3.3.3. Digital Compensator ......................................................................................................................... 16
3.3.4. Power Sequencing and the CONTROL Pin ...................................................................................... 16
3.3.5. Pre-biased Start-up and Soft Stop .................................................................................................... 17
3.3.6. Current Sensing ................................................................................................................................ 18
3.3.7. Temperature Measurement .............................................................................................................. 19
3.4. Fault Monitoring and Response Generation............................................................................................ 19
3.4.1. Output Over/Under-Voltage .............................................................................................................. 20
3.4.2. Output Current Protection and Limiting ............................................................................................ 20
3.4.3. Over-Temperature Protection ........................................................................................................... 20
3.5. Configuration ........................................................................................................................................... 20
4 PMBus™ Functionality ................................................................................................................................... 21
4.1. Introduction .............................................................................................................................................. 21
4.2. Timing and Bus Specification .................................................................................................................. 21
4.3. Address Selection via External Resistors................................................................................................ 22
4.4. Configuration Registers ........................................................................................................................... 23
4.5. Monitoring ................................................................................................................................................ 25
4.6. Additional Registers................................................................................................................................. 25
4.7. Detailed Description of the Supported PMBus™ Commands................................................................. 26
4.7.1. OPERATION ..................................................................................................................................... 26
4.7.2. ON_OFF_CONFIG............................................................................................................................ 26
4.7.3. CLEAR_FAULTS .............................................................................................................................. 26
4.7.4. VOUT_MODE ................................................................................................................................... 27
© 2016 Integrated Device Technology, Inc.
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January 25, 2016