ISL91107IRN-EVZ

USER’S MANUAL ISL91107IRx-EVZ UG066 Rev.2.00 Aug 23, 2017 Evaluation Boards Description Key Board Features The ISL91107IR is a high-current buck-boost switching regulator for systems using new battery chemistries. It uses Intersil’s proprietary buck-boost algorithm to maintain voltage regulation, while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage. The ISL91107IRN-EVZ and ISL91107IRA-EVZ platforms allow quick evaluation of the high performance features of the ISL91107IR buck-boost regulator. • Small, compact design • Jumper selectable EN (enabled/disabled) • Jumper selectable MODE (auto-PFM/forced-PWM) • Connectors, test points, and jumpers for easy probing Related Literature • For a full list of related documents, visit our website - ISL91107IR product page Specifications The boards are designed to operate at the following conditions: Ordering Information • Input voltage rating from 1.8V to 5.5V PART NUMBER DESCRIPTION • Resistor programmable output voltage on the ISL91107IRA-EVZ ISL91107IRN-EVZ Evaluation Board for ISL91107IRTNZ • Fixed 3.3V output voltage on the ISL91107IRN-EVZ ISL91107IRA-EVZ Evaluation Board for ISL91107IRTAZ • Up to 2A output current (PVIN = 2.8V, VOUT = 3.3V) • 2.5MHz switching frequency • Operating temperature range: -40°C to +85°C ISL91107IRAZ VIN GND PVIN VIN LX1 LX2 VOUT VOUT MODE FB GND EN SGND PGND FIGURE 1. ISL91107IRA-EVZ BLOCK DIAGRAM UG066 Rev.2.00 Aug 23, 2017 Page 1 of 6 ISL91107IRx-EVZ Functional Description The ISL91107IRN-EVZ and ISL91107IRA-EVZ provide simple platforms to demonstrate the features of the ISL91107IR buck-boost regulator. The ISL91107IRN-EVZ is for the fixed 3.3V output IC ISL91107IRTNZ. The ISL91107IRA-EVZ is for the adjustable output IC ISL91107IRTAZ. The evaluation boards have been functionally optimized for best performance of the ISL91107IR IC series. The input power and load connections are provided through multi-pin connectors for high current operations. load can be connected to the VOUT and GND headers on J2. Measure the input and output currents. Calculate efficiency based on these measurements. TABLE 1. OUTPUT VOLTAGE PROGRAMMING FOR ISL91107IRA-EVZ DESIRED OUTPUT VOLTAGE (V) R2 RESISTOR VALUE (kΩ) 2.0 124 2.5 88.7 3.0 68.1 The ISL91107IRA-EVZ evaluation board is shown in Figures 4 and 5. The board’s enable function is controlled by the on-board jumper header J3. Similarly, the Mode function is controlled by the on-board jumper header J4. 3.3 60.4 3.4 57.6 3.6 53.6 The schematic of the ISL91107IRA-EVZ evaluation board is shown in Figure 6 on page 4. The schematic for the ISL91107IRN-EVZ is shown in Figure 7 on page 5. The PCB layout images for all layers are shown in Figures 8 and 9 on page 6. The bill of materials of the ISL91107IRA-EVZ is shown in Table 2 on page 4. The bill of materials of the ISL91107IRN-EVZ is shown in Table 3 on page 5. 4.0 46.4 EN (2V/DIV) Operating Range The VIN range of the boards is 1.8V to 5.5V. The adjustable VOUT range for the ISL91107IRA-EVZ is 1V to 5.2V. The IOUT range of the boards is 0 to 2A. The operating ambient temperature range is -40°C to +85°C. VOUT (1V/DIV) INDUCTOR CURRENT (200mA/DIV) Quick Start Guide For the ISL91107IRA-EVZ board, the default output voltage is set at 3.3V. If other output voltages are desired, resistor R2 can be set to a desired voltage as shown in Table 1 (use a resistor with 1% accuracy). 1ms/DIV FIGURE 2. ISL91107IR START-UP WITH VIN = 2V AND VOUT = 3.3V Refer to the “Quick Setup Guide” to configure and power up the board for proper operation. During the power-on process, the expected waveforms are shown in Figures 2 and 3. Quick Setup Guide EN (2V/DIV) 1. Install a jumper on J3, shorting EN to VIN. 2. Install a jumper on J4, shorting MODE to VIN. 3. Connect the power supply to J1, with a voltage setting between 1.8V and 5.5V. VOUT (1V/DIV) 4. Connect the electronic load to J2. 5. Place scope probes on the VOUT test point and other test points of interest. INDUCTOR CURRENT (200mA/DIV) 6. Turn on the power supply. 7. Monitor the output voltage start-up sequence on the scope. The waveforms will look similar to that shown in Figures 2 and 3. 1ms/DIV FIGURE 3. ISL91107IR START-UP WITH VIN = 4V AND VOUT = 3.3V 8. Turn on the electronic load. 9. Measure the output voltage with the voltmeter. The voltage should regulate within datasheet specific limits. 10. To determine efficiency, measure the input and output voltages at J1 and J2 headers. The bench power supply can be connected to the PVIN and GND headers on J1. The electronic UG066 Rev.2.00 Aug 23, 2017 Page 2 of 6 ISL91107IRx-EVZ ISL91107IRA-EVZ and ISL91107IRN-EVZ Evaluation Boards FIGURE 4. ISL91107IRA-EVZ TOP VIEW FIGURE 5. ISL91107IRN-EVZ TOP VIEW UG066 Rev.2.00 Aug 23, 2017 Page 3 of 6 ISL91107IRx-EVZ ISL91107IRA-EVZ Evaluation Board Schematic *C1 is needed only when testing with a power supply. TP1 VIN U1 ISL91107 J1 1 2 3 4 5 6 VIN C1* 150uF C3 22uF C2 22uF 7 8 9 10 12 GND LX1 LX1 PVIN PVIN PVIN PVIN LX2 LX2 VIN CON6 EN 13 VOUT VOUT VOUT VOUT EN 5 6 1 2 17 18 19 20 LX1 TP2 LX1 L1 1uH LX2 TP4 VOUT TP3 LX2 J2 VOUT R1 187K C7 22pF C4 22uF C5 22uF C6 DNP GND J3 SGND FB 16 FB CON6 R2 60.4K 15 NC 3 4 21 11 MODE PGND PGND PGND MODE 14 J4 1 2 3 VIN EN 1 2 3 R3 10K CON3 VIN MODE 1 2 3 4 5 6 TP5 TP6 GNDGND R4 10K CON3 FIGURE 6. ISL91107IRA-EVZ EVALUATION BOARD SCHEMATIC TABLE 2. ISL91107IRA-EVZ EVALUATION BOARD BILL OF MATERIALS ITEM# QTY DESIGNATORS PART TYPE FOOTPRINT DESCRIPTION VENDORS 1 1 U1 ISL91107IRTAZ 20 Ld 3x4mm TQFN Buck-Boost Regulator with Adjustable Output Voltage Intersil 2 1 L1 1µH 3.2mmx2.5mm Power Inductor, DFE322512C Series, 4.6A (typical), 34mΩ (typical) Toko 3 1 C1 (Note 1) 150µF/6.3V 3528 Tantalum Capacitor, TCJH157M006R0200 AVX 4 4 C2, C3, C4, C5 22µF/10V/X5R 0603 Ceramic Capacitor, GRM188R61A226M Murata 5 1 C7 22pF/50V/NP0 0402 Ceramic Capacitor, GRM1555C1H220JA01D Murata 6 1 R1 187kΩ1% 0402 Resistor, Generic ANY 7 1 R2 60.4kΩ1% 0402 Resistor, Generic ANY 8 2 R3, R4 10kΩ5% 0603 Resistor, Generic ANY 9 2 J1, J2 HDR-6 HDR-6 Vert. Pin Header, 6-Pin, 0.1” Spacing, Generic ANY 10 2 J3, J4 HDR-3 HDR-3 Vert. Pin Header, 3-Pin, 0.1” Spacing, Generic ANY NOTE: 1. C1 is needed only when testing with a power supply. UG066 Rev.2.00 Aug 23, 2017 Page 4 of 6 ISL91107IRx-EVZ ISL91107IRN-EVZ Evaluation Board Schematic *C1 is needed only when testing with a power supply. TP1 VIN U1 ISL91107 J1 1 2 3 4 5 6 VIN C1 * 150uF C3 22uF C2 22uF 7 8 9 10 12 GND LX1 LX1 PVIN PVIN PVIN PVIN LX2 LX2 VIN CON6 EN 13 VOUT VOUT VOUT VOUT EN 5 6 1 2 17 18 19 20 LX1 TP2 LX1 L1 1uH LX2 TP4 VOUT TP3 LX2 J2 VOUT R1 0 C7 DNP C4 22uF C5 22uF C6 DNP GND J3 SGND FB 16 FB CON6 R2 DNP 15 NC 3 4 21 11 MODE PGND PGND PGND MODE 14 J4 1 2 3 VIN EN 1 2 3 R3 10K CON3 VIN MODE 1 2 3 4 5 6 TP5 TP6 GNDGND R4 10K CON3 FIGURE 7. ISL91107IRN-EVZ EVALUATION BOARD SCHEMATIC TABLE 3. ISL91107IRN-EVZ EVALUATION BOARD BILL OF MATERIALS ITEM# QTY DESIGNATORS PART TYPE FOOTPRINT 1 1 U1 ISL91107IRTNZ 2 1 L1 1µH 3.2mmx2.5mm 3 1 C1 (Note 2) 150µF/6.3V 4 4 C2, C3, C4, C5 5 1 6 DESCRIPTION VENDORS 20 Ld 3x4mm TQFN Buck-boost regulator with fixed output voltage Intersil Power inductor, DFE322512C series, 4.6A (typical), 34mΩ (typical) Toko 3528 Tantalum capacitor, TCJH157M006R0200 AVX 22µF/10V/X5R 0603 Ceramic capacitor, GRM188R61A226M R1 0Ω1% 0402 Resistor, Generic ANY 2 R3, R4 10kΩ5% 0603 Resistor, Generic ANY 7 2 J1, J2 HDR-6 HDR-6 Vert. Pin Header, 6-Pin, 0.1” Spacing, Generic ANY 8 2 J3, J4 HDR-3 HDR-3 Vert. Pin Header, 3-Pin, 0.1” Spacing, Generic ANY Murata NOTE: 2. C1 is needed only when testing with a power supply. © Copyright Intersil Americas LLC 2016-2017. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the document is current before proceeding. For information regarding Intersil Corporation and its products, see www.intersil.com UG066 Rev.2.00 Aug 23, 2017 Page 5 of 6 ISL91107IRx-EVZ PCB Layout FIGURE 8. TOP LAYER FIGURE 9. BOTTOM LAYER 1 UG066 Rev.2.00 Aug 23, 2017 Page 6 of 6