User’s Guide May 2003 Power Management Products Low Power SLVU061A
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.
DYNAMIC WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 2.7–24 V and the output current range of 0 mA to 50 mA. 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.
Preface About This Manual This user’s guide describes the TPS71533EVM LDO regulator evaluation module. Each EVM PCB contains a SLVP199 test board with a TPS71533DCK low dropout linear regulator as well as supporting passive components. The EVM provides a convenient method of evaluating the performance of the TPS715xx linear regulator family or other SC-70/SOT-323 packaged devices with similar pin-outs.
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Running Title—Attribute Reference Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 TPS715xx Family of LDO Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 EVM Design Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Schematic . . . . . . . . . . . . . . . . . . . . . .
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Chapter 1 Introduction This user’s guide describes the TPS71533EVM LDO regulator evaluation module. Each EVM contains a TPS71533 low dropout linear regulator as well as supporting passive components. Topic Page 1.1 TPS715xx Family of LDO Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2 1.2 EVM Design Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2 1.3 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TPS715xx Family of LDO Regulators 1.1 TPS715xx Family of LDO Regulators The TPS715xx family of LDO regulators is comprised of small SOT–223/PICO packaged regulators capable of delivering 50 mA of output current. Features of the part include: - 50-mA Low-Dropout Regulator - 24-V Maximum Input Voltage - Low 4.25-µA Quiescent Current at 50 mA - 5-Pin PICO/SC70 (DCK) Package - Stable With Any Ceramic Capacitor (>0.
Bill of Materials 1.4 Bill of Materials Table 1–1 lists materials required for the TPS71533EVM. Table 1–1. TPS71533EVM Bill of Materials Qty Ref Des Description Size MFR Part Number 1 C1 Capacitor, ceramic, 0.1 µF, 25 V, X7R, 10% 603 Murata GRM188R71E104KA01 1 C2 Capacitor, ceramic, 1-µF, 6.3 V, X5R, 10% 603 Murata GRM188R60J105KA01 4 J1–J4 Clip, surface-mount, 0.040 board, 0.090 standoff 0.
Board Layout Figure 1–3. Bottom Layer Figure 1–4.
Chapter 2 EVM Test Setup This chapter provides recommended test equipment and procedures for performing evaluations using the TPS71533EVM. Figure 2–1 shows the test setup. Figure 2–1.
The settings for the test equipment shown in Figure 2–1 are described below: - Function generator is set to a triangle wave that ramps from 0 V to 8 V, and a period of 10 ms. - Power amplifier is set to a gain of 3 dB and a minimum slew rate of 5000 V/µs. - Power supply capable of ±30-V swing and a 0.5-A current limit to power the power amplifier. - A four-channel oscilloscope with channel one’s voltage probe connected to J1 (IN) and channel two’s voltage probe connected to J3 (OUT).
Chapter 3 Test Results This chapter provides laboratory test results of the TPS71533EVM. Figure 3–1 shows the input voltage ramp from 0 to just below 24 V (CH1), the 3.3-V regulated output voltage (CH2), and the 50-mA output current (CH4). The scale on CH4 is 20 mA/div. Figure 3–1.
3-2 Test Results
