User’s Guide September 2001 PMP PD & PS SLVU055
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use.
EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 2.7 V to 5.5 V and the output voltage range of 2.7 V to 5.5 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Contents Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Operating Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Description and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 EVM Schematic . . . . . . . . . . . . . . . . .
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Chapter 1 Introduction The TPS2080 is a Texas Instruments power distribution switch that eliminates high-frequency hot-plug or hot-removal transients, reduces inrush current, and provides overcurrent protection. The TPS2080 is a dual-channel N-channel power MOSFET designed for a CompactFlash Plus card but suitable for many other applications. The TPS2080 meets the required power management specified in CF+ and CompactFlash specification revision 1.4.
Operating Specifications 1.1 Operating Specifications Table 1–1. Operating Specifications for the TPS2080EVM (SLVP196) Item Min Typ Max Units Input voltage range (VI) 2.7 5.5 V Output voltage range (VO) 2.7 5.5 V 0 0.5 A 1 1.3 A Min Typ Max 3† 4‡ ms 5† 20§ ms Output current range (IO) Output current limit 0.7 Table 1–2.
Chapter 2 Description and Testing Figure 2–1 shows the schematic of the TPS2080EVM (SLVP196). The schematic shows two connectors (J1 and J2). J1 is used to connect input supply voltages and external enable signals (EN1 and EN2). EN1 is used to externally enable VO1 and En2 is used to externally enable VO2. Note: When external enable terminals are used, SW1 and SW2 must be on the Disable positions marked on the EVM. For normal operation, EN1 and EN2 should be floating.
EVM Schematic 2.1 EVM Schematic Figure 2–1.
EVM Layout Table 2–1. TPS2080EVM Bill of Materials Qty. Designator Description Size Manufacturer Part Number 1 C1 Capacitor, ceramic, 0.1 µF, 16 V 603 Murata GRM39X7R104K016A 1 C2 Capacitor, ceramic, 0.1 µF, 16 V 603 Murata GRM39X7R104K016A 1 C3 Capacitor, ceramic, 0.1 µF, 16 V 603 Murata GRM39X7R104K016A 1 C4 Capacitor, ceramic, 0.1 µF, 16 V 603 Murata GRM39X7R104K016A 1 C5 Capacitor, aluminum, 150 µF, 10 V, 20% 0.335 x 0.
EVM Layout Figure 2–3. TPS2080EVM (SLVP196)—Bottom Layer Figure 2–4.
EVM Setup 2.3 EVM Setup Proper operation of the EVM requires two 6-V/1-A power supplies, two resistive loads, two voltage meters, and an oscilloscope. Refer to the setup diagram in Figure 2–5 and follow these steps for hot-plug testing: 1) With the input supplies disconnected from the unit under test, adjust the input voltages to 3.3 volts and turn off the power supplies. Slide switches SW1 and SW2 (on the SLVP196) to the Disable position. 2) Adjust the load currents to 0.
EVM Setup Figure 2–5.
Test Results 2.4 Test Results Figures 2–6 through 2–10 show the test results for the TPS2080EVM. Figure 2–6. TPS2080EVM Test at VI = 3.3 V, IO = 75 mA (a) Hot-Plug (b) Hot-Removal Figure 2–7.
Test Results Figure 2–8. TPS2080EVM Test at VI = 2.7 V, IO = 75 mA (a) Hot-Plug (b) Hot-Removal Figure 2–9. TPS2080EVM Test at VI = 5.5 V, IO = 100 mA (a) Hot-Plug Figure 2–10. Thermal Shutdown at VI = 3.
