ZTP7193YH

ZTP7193YH 3A, 18V, 1MHz, Synchronous Step-Down DC/DC Converter FEATURES ● ● ● ● ● ● ● ● ● ● ● DESCRIPTION 4.5V to 18V input voltage Output adjustable from 0.6V to 14V Output current up to 3A Integrated 85mΩ/45mΩ power MOSFET switches Shutdown current 3μA typical Efficiency up to 95% Fixed frequency 1MHz Internal soft start Over current protection and Hiccup Over temperature protection RoHS Compliant and 100% Lead (Pb) Free The ZTP7193YH is a high-frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 3A continuous output current over a wide input supply range, with excellent load and line regulation. The ZTP7193YH has synchronous-mode operation for higher efficiency over the output current-load range. Current-mode operation provides fast transient response and eases loop stabilization. Protection features include over-current protection and thermal shutdown. The ZTP7193YH requires a minimal number of readily available, standard external components and is available in a space-saving TSOT23-6L package. APPLICATIONS Distributed power systems Networking systems ● FPGA, DSP, ASIC power supplies ● Notebook computers ● Green electronics or appliance ● ● Pins Configuration Top View TSOT23-6L ORDERING INFORMATION PART PACKAGE RoHS Ship, Quantity ZTP7193YH TSOT23-6L Yes Tape and Reel BOOT 1 6 SW GND 2 5 IN FB 3 4 EN Typical Application Circuit Input C1 10μF/25V Ceramic 4 5 IN EN C7 0.1μF C5 100nF 1 BOOT SW 6 ZTP7193YH L1 4.7μH Output 3.3V/3A R1 29kΩ FB 3 GND 2 R2 6.4kΩ C2 22μF/6.3V Ceramic x 2 Note: C7 are optional. Details please see the DVT report. DS-15 Copyright © ZillTek Technology Corp. -1- 4F-3, No.5, Technology Rd., Science-Based Industrial Park, Hsinchu 30078, Taiwan Tel: (886) 3577 7509; Fax: (886) 3577 7390 Email: sales@zilltek.com ZTP7193YH Absolute Maximum Ratings Recommended Operating Conditions Supply Voltage VIN ……...…………...…….……… 4.5V to 18V Output Voltage VOUT ……...…………...…….. 0.6V to VIN–4V Operating Temperature Range ……...…… –40°C to +125°C Supply Voltage VIN ……………………………….... –0.3V to +19V Enable Voltage VEN..................................... –0.3V to +19V Switch Node VSW ………………………………. –0.3V to VIN+0.3V Boost VBOOT …………………………………… VSW–0.3V to VSW+6V All Other Pins …………………………………………… –0.3V to +6V Power Dissipation @25℃…………………………………… 1.2W Junction Temperature ………………………………………. +150°C Lead Temperature …………………………………………….. +260°C Storage Temperature Range …………....... –65°C to +150°C ESD, HBM ………………………………………………………………. 2KV ESD, MM ………………………………………………………………200V Package Thermal Characteristics TSOT23-6L: Thermal Resistance, θJA ………………………………… 100°C/W Thermal Resistance, θJC ……………………………………. 55°C/W Pins Description TSOT 23-6L 1 CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Electro-Static Discharge Sensitivity Symbol Description BOOT High-side gate drive boost input. 2 GND Ground. 3 FB Feedback input. 4 EN Enable input. 5 IN Power input. 6 SW Power switching output. This integrated circuit can be damaged by ESD. It is recommended that all integrated circuits be handled with proper precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Functional Block Diagram DS-15 Copyright © ZillTek Technology Corp. -2- 4F-3, No.5, Technology Rd., Science-Based Industrial Park, Hsinchu 30078, Taiwan Tel: (886) 3577 7509; Fax: (886) 3577 7390 Email: sales@zilltek.com ZTP7193YH OVP + _ RAMP Oscillator Fosc1 or Fosc2 CLK 0.72V FB 5 + _ Current Sense Amplifier + Σ 2 IN _ 5V 0.3V 15K 500K Soft Start − + + 0.6V 1 BOOT 1.2pF 47pF Error Amplifier M1 S Q + _ Current Comparator 3 SW R Q M2 4 GND OVP EN IN 65% PCB layout is very important to achieve stable operation. Please follow the guidelines below. 1) Keep the path of switching current short and minimize the loop area formed by Input capacitor, high-side MOSFET and low-side MOSFET. 2) Bypass ceramic capacitors are suggested to be put close to the VIN Pin. 3) Ensure all feedback connections are short and direct. Place the feedback resistors and compensation components as close to the chip as possible. 4) Rout SW away from sensitive analog areas such as FB. 5) Connect IN, SW, and especially GND respectively to a large copper area to cool the chip to improve thermal performance and long-term reliability. External BOOT Diode IN4148 BOOT CBS 0.1~1μF ZTP7193YH SW L COUT + 5V or 3.3V Figure 2: Add optional external bootstrap diode to enhance efficiency. In these cases, an external BOOT diode is recommended from the output of the voltage regulator to BOOT pin, as shown in Figure 2. The recommended external BOOT diode is IN4148, and the BOOT capacitor is 0.1 ~ 1μF. BOM of ZTP7193YH Please refer to the Typical Application Circuit. Item 1 2 3 When VIN ≤ 6V, for the purpose of promote the efficiency, it can add an external Schottky diode between IN and BOOT pins, as shown in Figure 3. Reference C1 C5 C7 Part 10μF 100nF 0.1μF Table 3: BOM selection table I. Schottky (B0520LW) 5V to 6V BOOT IN ZTP7193YH SW VOUT GND Figure 3: Add a Schottky diode to promote efficiency Vout = 5.0V Vout = 3.3V Vout = 2.5V Vout = 1.8V Vout = 1.2V Vout = 1.05V L1 6.8μH 4.7μH 4.7μH 3.3μH 2.2μH 2.2μH R1 23.7K 29.0K 49.0K 66.5K 81.5K 85.3K R2 3.2K 6.4K 15.5K 33.3K 81.5K 113.7K C2 22μF×2 22μF×2 22μF×2 22μF×2 22μF×2 22μF×2 Table 4: BOM selection table II. DS-15 Copyright © ZillTek Technology Corp. -8- 4F-3, No.5, Technology Rd., Science-Based Industrial Park, Hsinchu 30078, Taiwan Tel: (886) 3577 7509; Fax: (886) 3577 7390 Email: sales@zilltek.com ZTP7193YH PACKAGE DIMENSIONS DS-15 Copyright © ZillTek Technology Corp. TSOT23-6L -9- 4F-3, No.5, Technology Rd., Science-Based Industrial Park, Hsinchu 30078, Taiwan Tel: (886) 3577 7509; Fax: (886) 3577 7390 Email: sales@zilltek.com