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The TPS629206 is high-efficiency and highly flexible synchronous step-down buck converter in a small 1.6-mm × 2.1-mm SOT583 package. The TPS629206 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 needing to use different inductors. The device includes a MODE/S-CONF input to select different combinations of following:
Table 2-1 provides a summary of the TPS629206EVM 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 | 600 | mA | ||
| 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 = 600 mA, forced PWM, 2.5 MHz, 3.3-μH inductor | 0.182 | 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 600 mA, forced PWM and auto PFM/PWM with AEE, 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–600 mA, forced PWM and auto PFM/PWM with AEE, 2.5/1 MHz, VSET, 3.3-μH inductor | +0.7%, –.2% | |||
| Output ripple | VIN = 12 V, VOUT = 3.3 V, IOUT = 600 mA, forced PWM, 2.5 MHz, 3.3-μH inductor | 10 | mV | ||
| Peak efficiency | VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A–600 mA, forced PWM, 2.5 MHz, 3.3-μH inductor | 91.5% | |||
| VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A–600 mA, auto PFM/PWM with AEE, 2.5 MHz, 3.3-μH inductor | 91.7% | ||||
| 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 = 600 mA, forced PWM, 2.5 MHz, 3.3-μH inductor | 500 | μs | ||
| Load transient | VIN = 12 V, VOUT = 3.3 V, IOUT = 300 mA–600 mA, slew rate: 1 A/μs, forced PWM, VSET, 2.5 MHz, 3.3-μH inductor | ±34 | mV | ||
| Loop bandwidth | VIN = 12 V, VOUT = 3.3 V, IOUT = 600 mA, forced PWM, VSET, 2.5 MHz, 3.3-μH inductor | 95.89 | kHz | ||
| Phase margin | VIN = 12 V, VOUT = 3.3 V, IOUT = 600 mA, forced PWM, VSET, 2.5 MHz, 3.3-μH inductor | 84.4 | deg | ||
| IC case temperature | VIN = 12 V, VOUT = 3.3 V, IOUT = 600 mA, forced PWM, 2.5 MHz, 3.3-μH inductor, 10 minutes soaking | 30.5 | °C |
The EVM is designed to provide access to features of the TPS629206. The EVM also provides jumpers for different configurations. Jumper selections must be made prior to enabling the TPS629206. 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 TPS629206EVM allows multiple MODE/S-CONF pin configurations. The loop response can also be measured.