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The TPS54824 dc/dc converter is a synchronous buck converter designed to provide up to an 8-A output. The input (VIN) is rated for 4.5 V to 17 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 can be achieved when designing with the TPS54824 regulator. The RT/CLK pin is configured for 700-kHz switching frequency. The high-side and low-side MOSFETs are incorporated inside the TPS54824 package along with the gate-drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS54824 to achieve high efficiencies and helps keep the junction temperature low at high output currents. An external divider allows for an adjustable output voltage. Additionally, the TPS54824 provides adjustable soft start and undervoltage lockout inputs and a power-good output.
EVM | INPUT VOLTAGE RANGE | OUTPUT CURRENT RANGE |
---|---|---|
TPS54824EVM-779 | VIN = 4.5 V to 17 V | 0 A to 8 A |
A summary of the TPS54824EVM-779 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of VIN = 12 V and an output voltage of 1.8 V, unless otherwise specified. The TPS54824EVM-779 is designed and tested for VIN = 4.5 V to 17 V. The ambient temperature is 25°C for all measurements, unless otherwise noted.
SPECIFICATION | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
VIN voltage range | 4.5 | 12 | 17 | V | ||
VIN start voltage | 4.4 | V | ||||
VIN stop voltage | 4 | V | ||||
Output voltage setpoint | 1.8 | V | ||||
Output current range | VIN = 4.5 V to 17 V | 0 | 8 | A | ||
Load regulation | VIN = 4.5 V to 17 V, IO = 8 A | –0.1% | ||||
Load transient response | IO = 2 A to 6 A | Voltage change | –50 | mV | ||
Recovery time | 75 | µs | ||||
IO = 6 A to 2 A | Voltage change | 55 | mV | |||
Recovery time | 75 | µs | ||||
Loop bandwidth | VIN = 12 V, IO = 4 A | 116 | kHz | |||
Phase margin | VIN = 12 V , IO = 4 A | 58 | degree | |||
Input ripple voltage | IO = 8 A | 270 | mVPP | |||
Output ripple voltage | IO = 8 A | 11 | mVPP | |||
Output rise time | 1.1 | ms | ||||
Operating frequency (fSW) | 700 | kHz | ||||
Maximum efficiency | TPS54824EVM-779, VIN = 5 V, IO = 2 A | 94.3% |