SLUSFL6C November   2024  – June 2025 TPSM82866C

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Save Mode
      2. 7.3.2 Forced PWM Mode
      3. 7.3.3 Optimized Transient Performance from PWM to PSM Operation
      4. 7.3.4 Low Dropout Operation (100% Duty Cycle)
      5. 7.3.5 Enable and Soft-Start Ramp
      6. 7.3.6 Switch Current Limit and HICCUP Short-Circuit Protection
      7. 7.3.7 Undervoltage Lockout
      8. 7.3.8 Thermal Warning and Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable and Disable (EN)
      2. 7.4.2 Start-Up Output Voltage and I2C Target Address Selection (VSET)
      3. 7.4.3 Select Output Voltage Registers (VID)
      4. 7.4.4 Output Discharge
      5. 7.4.5 Power Good (PG)
    5. 7.5 Programming
      1. 7.5.1 Serial Interface Description
      2. 7.5.2 Standard-Mode, Fast-Mode, and Fast-Mode Plus Protocol
      3. 7.5.3 HS-Mode Protocol
      4. 7.5.4 I2C Update Sequence
      5. 7.5.5 I2C Register Reset
  9. 8 Register Map
    1. 8.1 Target Address Byte
    2. 8.2 Register Address Byte
    3. 8.3 VOUT Register 1
    4. 8.4 VOUT Register 2
    5. 8.5 CONTROL Register
    6. 8.6 STATUS Register
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Input and Output Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
        1. 9.4.2.1 Thermal Considerations
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

5 Pin Configuration and Functions

TPSM82866C TPSM82864x, TPSM82866x - RCF (15 Pin) QFN-FCMODFigure 5-1 TPSM82864x, TPSM82866x - RCF (15 Pin) QFN-FCMOD
Table 5-1 Pin Functions
PINTYPE(1)DESCRIPTION
NAMENO.
AGND

11

PAnalog ground pin. Must be connected to a common GND plane.
EN

2

IDevice enable pin. To enable the device, this pin must be pulled high. Pulling this pin low disables the device. Do not leave floating.

SDA

3

I/O

I2C serial data pin. Do not leave floating. Connect a pullup resistor to a logic high level. If the I2C interface is not used, connect the pin to GND.

SCL

4

I

I2C serial clock pin. Do not leave this pin floating. Connect a pullup resistor to a logic high level. If the I2C interface is not used, connect the pin to GND.

VSET/VID

10

I

Only applies to TPSM8286xCxx. Connecting a resistor to GND selects one of the Start-up output voltages and I2C device address. See Section 7.4.2 for details. After start-up, the pin can be used to switch between the VOUT registers for the output voltage selection. (Low = VOUT Register 1; High = VOUT Register 2). The availability of this pin function after start-up depends on the selected device option.

VSET/PG

10

I/O

Only applies to TPSM8286xExx. Connecting a resistor to GND selects one of the Start-up output voltages and I2C device address. See Section 7.4.2 for details. After start-up, the pin is used as a power-good indicator. When the output voltage is outside the power-good threshold or a fault is detected, the pin is driven high (Vin). When the output voltage is regulated, the pin is pulled low through the external resistor. See Section 7.4.5 for details. The availability of this pin function after start-up depends on the selected device option.

PGND

8, 9, 12, 13

PPower ground pin. Must be connected to common GND plane.
SW

15

OSwitch pin of the power stage. This pin can be left floating.
VIN

1, 14

PPower supply input voltage pin
VOS

7

IOutput voltage sense pin. This pin must be directly connected to the output capacitor.
VOUT

5, 6

POutput voltage pin
(1) I = Input, O = Output, P = Power