All trademarks are the property of their respective owners.
The following warnings and cautions are noted for the safety of anyone using or working close to the TPS54A20EVM-770. Observe all safety precautions.
![]() | Warning | The TPS54A20EVM-770 circuit module may become hot during operation due to dissipation of heat. Avoid contact with the board. Follow all applicable safety procedures applicable to your laboratory. |
![]() | Caution | Do not leave the EVM powered when unattended. |
The circuit module has signal traces, components, and component leads on the bottom of the board. This may result in exposed voltages, hot surfaces or sharp edges. Do not reach under the board during operation.
The circuit module may be damaged by over temperature. To avoid damage, monitor the temperature during evaluation and provide cooling, as needed, for your system environment.
Some power supplies can be damaged by application of external voltages. If using more than 1 power supply, check your equipment requirements and use blocking diodes or other isolation techniques, as needed, to prevent damage to your equipment.
The TPS54A20 dc/dc converter is a two-phase synchronous series capacitor buck converter designed to provide up to a 10-A output. The input (VIN) is rated for 8 V to 14 V. Rated input voltage and output current range for the evaluation module are given in Table 1-1. This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS54A20 regulator. The switching frequency is externally set at a nominal 2 MHz for each side, 4 MHz effective. The high-side and low-side MOSFETs are incorporated inside the TPS54A20 package along with the gate drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS54A20 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The compensation components are internal to the integrated circuit (IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54A20 provides adjustable slow start and undervoltage lockout inputs. The absolute maximum input voltage is 15 V while switching and 17 V for non-switching conditions.
EVM | INPUT VOLTAGE RANGE | OUTPUT CURRENT RANGE |
---|---|---|
TPS54A20EVM-770 | VIN = 9.2 V to 14 V | 0 A to 10 A |
A summary of the TPS54A20EVM-770 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 1.2 V, unless otherwise specified. The TPS54A20EVM-770 is designed and tested for VIN = 9.2 V to 14 V. The ambient temperature is 25°C for all measurements, unless otherwise noted.
SPECIFICATION | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
VIN voltage range | 9.2 | 12 | 14 | V | ||
VIN start voltage | 9.39 | V | ||||
VIN stop voltage | 9.14 | V | ||||
Output voltage setpoint | 1.2 | V | ||||
Output current range | VIN = 9.2 V to 14 V | 0 | 10 | A | ||
Line regulation | IO = 5 A, VIN = 9.2 V to 14 V | ±0.04% | ||||
Load regulation | VIN = 12 V, IO = 0 A to 10 A | ±0.03% | ||||
Load transient response | IO = 0 A to 9 A | Voltage change | –60 | mV | ||
Recovery time | 60 | µs | ||||
IO = 9 A to 0 A | Voltage change | 60 | mV | |||
Recovery time | 60 | µs | ||||
Loop bandwidth | VIN = 12 V, IO = 5 A | 280 | kHz | |||
Phase margin | VIN = 12 V , IO = 5 A | 45 | degree | |||
Input ripple voltage | IO = 10 A | 90 | mVPP | |||
Output ripple voltage | IO = 10 A | 20 | mVPP | |||
Output rise time | 512 | µs | ||||
Operating frequency | 2 | MHz | ||||
Maximum efficiency | TPS54A20EVM-770, VIN = 9 V, IO = 5 A | 84.7% |
These evaluation modules are designed to provide access to the features of the TPS54A20. Some modifications can be made to this module.