TPS60100, TPS60110 DC/DC Converter Evaluation Module User’s Guide June 1999 Mixed-Signal Products SLVU016
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Running Title—Attribute Reference Contents 1 TPS60100 and TPS60110 EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Schematic of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Layout of the EVM . . . . . . . . . . . . . . . . .
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Chapter 1 TPS60100 and TPS60110 EVM The evaluation modules (EVM) for the new Texas Instruments (TI) charge pump devices TPS60100 and TPS60110 help designers to evaluate the devices. The TPS60100 and TPS60110 charge pumps (also called switched capacitor DC/DC converters) are regulated voltage doublers. With these EVMs it is possible to evaluate all different modes of the devices as well as their performance.
Introduction 1.1 Introduction The Texas Instruments TPS60100 and TPS60110 charge pumps are regulated voltage doublers. The TPS60100 has an output voltage of 3.3 V from an input signal between 1.8 V and 3.6 V. The TPS60110 has an output voltage of 5 V from an input voltage between 2.7 V and 5.4 V. Both devices consist of two single-ended charge pumps that can operate either in phase (for minimum external components) or in anti-phase (for minimum output noise).
Schematic of the EVM 1.2 Schematic of the EVM The schematics of the two EVMs for TPS60100 and TPS60110 are the same. The differences between the boards are the IC itself, the values for the external components (see Table 1–1), and the use of the connector 3V8. The connector 3V8 can be used on the EVM for TPS60100 to adjust the output voltage to 3.8 V. This mode is not implemented on the TPS60110. As long as you do not want to synchronize the TPS60110, connect this pin with a jumper to GND.
Layout of the EVM (see Table 1–2). Each connector has the supply (In) signal at the first pin, the logic input at the second pin, and the ground (GND) signal at the third pin. So it is possible to use jumpers to connect the pin either to input (supply voltage) or to ground. It is also possible to connect any other signal by using an external signal source and connecting it to the second pin. These five pins are logic level CMOS inputs; for the specification of the levels, refer to the datasheets.
Setup of the EVM Figure 1–3. Top Layer of the EVM Table 1–1 contains the values and description of all 6 capacitors that are placed on the EVM. The space needed for the IC and the capacitors on the EVM is around 15 mm × 16 mm = 240 mm2. The capacitors are not optimized for space. They are optimized for performance. It is possible to use smaller capacitors to optimize the layout for minimum board space.
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