SBVS338E March 2020 – December 2021 TPS7A20

PRODUCTION DATA

- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information

- DQN|4

The operational area of an LDO is limited by the dropout voltage, output current, junction temperature, and input voltage. The recommended area for continuous operation for a linear regulator is given in Figure 8-3 and can be separated into the following parts:

- Dropout voltage limits the minimum differential
voltage between the input and the output (V
_{IN}– V_{OUT}) at a given output current level. See the*Section 7.4.3*section for more details. - The rated output currents limits the maximum recommended output current level. Exceeding this rating causes the device to fall out of specification.
- The rated junction temperature limits the maximum junction temperature of the device. Exceeding this rating causes the device to fall out of specification and reduces long-term reliability.
- The shape of the slope is given by Equation 4. The slope is nonlinear because the maximum-rated junction temperature of the LDO is controlled by the power dissipation across the LDO; thus when V
_{IN}– V_{OUT}increases the output current must decrease.

- The shape of the slope is given by Equation 4. The slope is nonlinear because the maximum-rated junction temperature of the LDO is controlled by the power dissipation across the LDO; thus when V
- The rated input voltage range governs both the minimum and maximum of V
_{IN}– V_{OUT}.

Figure 8-3 shows the recommended area of operation for this device on a JEDEC-standard high-K board with a R_{θJA} as given in the *Thermal Information* table.