& $ # " # # " ' ' ! # " "! % ! " #!! " User’s Guide August 2000 Power Management Products SLVU030
IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete.
Related Documentation From Texas Instruments Preface Read This First About This Manual This user’s guide describes the evaluation module (EVM) TPS60210EVM-167. This EVM helps to evaluate the performance of the regulated low-ripple charge pump dc/dc converter TPS60210. The EVM has the dimension of a 14-pin dual inline package and the board is a single-layer board. The board design is optimized for performance and space.
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Running Title—Attribute Reference Contents 1 Description of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2 Physical Data and Setup of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Schematic of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 Layout of the EVM . . . . . . . . . . . . . . . . .
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Chapter 1 Description of the EVM The Texas Instruments TPS60210 charge pump is a regulated voltage doubler. The TPS60210 delivers 3.3-V output voltage (VO) from a 1.8-V to 3.6-V input voltage (VI). The output current (IO) is 100 mA minimum, for an input voltage (VI) of 2.0 V or higher. For output currents below 2 mA, the device can be operated in the snooze mode (SNOOZE = 0). This is an operating mode, where the quiescent current is drastically reduced. In this mode, VO is regulated to 3.3 V ±6%.
The TPS60210 EVMs can also be used to evaluate the other devices of this family (TPS60211, TPS60212, and TPS60213). For that purpose, replace the integrated circuit. For the TPS60211 and TPS60213, the LBI resistors should be removed and LBI connected to GND. The LBO pullup resistor works as power good (PG) pullup, and the LBO pad gives the PG signal. Free samples of the other parts of the TPS6021x family can be ordered from http://www.ti.com.
Chapter 2 Physical Data and Setup of the EVM This section shows the schematic, the layout, and setup of the EVM. The layout of a charge pump circuit is critical; therefore, the given layout can be used as a reference and helps to reduce design and evaluation time. Topic Page 2.1 Schematic of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 Layout of the EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.
Schematic of the EVM 2.1 Schematic of the EVM Figure 2–1 shows the schematic of the EVM. For this EVM, only ceramic capacitors with X5R or X7R material are used. Figure 2–1. Schematic of the EVM INPUT 1.8 V to 3.6 V 7 TPS60210 IN OUT 1 R3 LBI LBO R4 5 R1 C3 2.2 µ F OUTPUT 3.3 V, 100 mA 10 R2 100 nF 4 C1 1 µF 3 9 C1+ C2+ C1– C2– C4 2.2 µ F Low Battery Warning 6 8 SNOOZE GND 2 C2 1 µF Table 2–1.
Schematic of the EVM R4 is the pullup resistor for the SNOOZE pin, therefore, the device operates in normal mode. Applying a logic low level to the SNOOZE input, programs the device in snooze mode. Note: When the device is in snooze mode, be aware that the LBI and SNOOZE resistors (R1, R2, and R4) draw more current than the device itself. For measuring the low quiescent current in this mode, these three resistors must be removed.
Layout of the EVM 2.2 Layout of the EVM Figure 2–2 and Figure 2–3 show the placement of the components and the layout of the EVM. The components and all signals are exclusively placed on the top layer of the PC board. Figure 2–4 shows the actual size of the board. C1 R3 R2 IC1 C5 R1 C4 Figure 2–2. Placement of the Components C3 R4 C2 Figure 2–3. Single Layer of the EVM Figure 2–4.
Setup of the EVM Table 2–2. Pin Assignment of the Board to a 14-Pin Dual-In-Line Socket Socket Pin Number Connected Signal 1 LBI 2 Not connected 3 OUT 7, 8 GND 12 IN 13 SNOOZE 14 LBO 2.3 Setup of the EVM Follow these steps for proper operation of the EVM: 1) Connect a load to the output (between GND and OUT). > 33 Ω or 0 mA to 100 mA for 2.0 V ≤ VI ≤ 3.6 V > 66 Ω or 0 mA to 50 mA for 1.8 V ≤ VI < 2 V > 132 Ω or 0 mA to 25 mA for 1.6 V ≤ VI ≤ 1.
Evaluation Information 2.4 Evaluation Information Due to the pullup resistor R4 at SNOOZE of the EVM, the TPS60210 is enabled by default. To operate the device in snooze mode, drive the SNOOZE pin of the EVM to ground. By connecting a clock signal between 400 kHz and 800 kHz to the SNOOZE pin of the board, the device can be synchronized to an external clock. To get the proper duty cycle and levels, please refer to the TPS6021x data sheet (literature number SLVS296).
