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The TPS629210E is high-efficiency and highly flexible synchronous step-down buck converter in a small 1.6-mm × 2.1-mm SOT583 package with –55°C to 150°C extended operating temperature performance. The TPS629210E can be configured to run 2.5 MHz or 1 MHz in either forced PWM mode or auto PFM/PWM mode. In 2.5-MHz auto PFM/PWM mode, TI AEE mode automatically adjusts the switching frequency based on both input and output voltage to hold a high efficiency through the whole operation range without the need of using different inductors. The device includes a Mode/S-CONF input to select different combinations of following:
Table 2-1 provides a summary of the TPS629210EEVM performance specifications. All the specifications are given at an ambient temperature of 25°C.
| Specification | Test Conditions | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| Input voltage | 5 | 12 | 17 | V | |
| Output voltage | 3.3 | V | |||
| Output current | 0 | 1 | A | ||
| Input current | VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A, forced PWM, 2.5 MHz, 3.3-μH inductor | 5.7 | mA | ||
| VIN = 12 V, VOUT = 3.3 V, IOUT = 1 A, forced PWM, 2.5 MHz, 3.3-μH inductor | 0.302 | A | |||
| Switching frequency | Set by the Mode/S-CONF pin | 2.5 | MHz | ||
| Line regulation | VIN = 5 V–17 V, VOUT= 3.3 V, IOUT = 0 A and 1 A, forced PWM, 2.5/1 MHz, VSET, 3.3-μH inductor | +0.5%, –0.2% | |||
| Load regulation | VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A–1 A, forced PWM and auto PFM/PWM with AEE, 2.5/1 MHz, VSET, 3.3-μH inductor | +0.7%, –0.2% | |||
| Output ripple | VIN = 12 V, VOUT = 3.3 V, IOUT = 1 A, forced PWM, 2.5 MHz, 3.3-μH inductor | 10 | mV | ||
| Peak efficiency | VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A–1 A, forced PWM, 2.5 MHz, 3.3-μH inductor | 90.43% | |||
| VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A–1 A, auto PFM/PWM with AEE, 2.5 MHz, 3.3-μH inductor | 90.77% | ||||
| VIN = 12 V, VOUT = 3.3 V, IOUT = 10 mA, auto PFM/PWM with AEE, 2.5 MHz, 3.3-μH inductor | 84.66% | ||||
| Output rise time | VIN = 12 V, VOUT = 3.3 V, IOUT = 1 A, forced PWM, 2.5 MHz, 3.3-μH inductor | 500 | μs | ||
| Load transient | VIN = 12 V, VOUT = 3.3 V, IOUT = 0.5 A–1 A, slew rate: 1 A/μs, forced PWM, VSET, 2.5 MHz, 3.3-μH inductor | ±58 | mV | ||
| Loop bandwidth | VIN = 12 V, VOUT = 3.3 V, IOUT = 1 A, forced PWM, VSET, 2.5 MHz, 3.3-μH inductor | 95.89 | kHz | ||
| Phase margin | VIN = 12 V, VOUT = 3.3 V, IOUT = 1 A, forced PWM, VSET, 2.5 MHz, 3.3-μH inductor | 84.4 | deg | ||
| IC case temperature | VIN = 12 V, VOUT = 3.3 V, IOUT = 1 A, forced PWM, 2.5 MHz, 3.3-μH inductor, 10 minutes soaking | 34.6 | °C |
The EVM is designed to provide access to features of the TPS629210E. The EVM also provides jumpers for different configurations. Jumper selections must be made prior to enabling the TPS629210E. Additional input and output capacitors can be added. The input voltage at which the IC turns on can be programmed with a voltage divider. The TPS629210EEVM allows multiple MODE/S-CONF pin configurations. The loop response can also be measured.