BU33UV7NUX-EVK-101 ROHM

Datasheet Synchronous Boost DC/DC Converter (LOAD:500mA V =3.3V , V =1.8V) OUT IN BU33UV7NUX General Description Key Specifications BU33UV7NUX is a synchronous boost convertor with low Input Voltage Range 0.6V to 4.5V power consumption and provides a power supply for Fixed Output Voltage 3.3V products powered by either two-cell alkaline/NiCd/NiMH Efficiency 94%(Max) or one-cell alkaline/Li-ion or Li-polymer battery. Current Consumption 7A(MODE=Low) Output currents can go as high as 500mA(VIN=1.8V). 13A(MODE=High) BU33UV7NUX has reset circuit. (Detection voltage:1.5V, Release Voltage:1.9V) Start-up Voltage 0.9V BU33UV7NUX output voltage is fixed 3.3V by internal resistor divider. V is connected with V when V OUT IN IN Package W(Typ) x D(Typ) x H(Max) voltage is higher than 3.3V. VSON010X3020 3.00mm x 2.00mm x 0.60mm Features Synchronous Boost DC/DC Converter Iomax 500mA V =3.3V, V =1.8V(Ta=25C) OUT IN Disconnect Function during EN-OFF and UVLO Auto-PFM/PWM (MODE=H(=V )), IN Fixed PFM (MODE=L(=0V)) Reset Function (Detect Voltage = 1.5V) Pass-Through Function (V > V ) IN OUT Thermal Shutdown Applications 10-Pin VSON010X3020 Package Single-Cell or Two-Cell Alkaline NiCd/NiMH or Single-Cell Li Battery-Powered Products IC Recorders Wireless Mouse Portable Audio Players Cellular Phones Personal Medical Products Remote Controllers Typical Application Circuit Typical Performance Characteristics V IN Efficiency(V =2.4V, V =3.3V) IN OUT 100 C0:10F INTLDO VIN 95 C2:1F AGND PGND L0:4.7H 90 85 FB SW MODE=L 80 EN VOUT V OUT MODE=H V IN C1 75 RSTB MODE 70 65 60 MODE=H: Auto-PFM/PWM 0.1 1 10 100 1000 MODE=L: Fixed PFM Output Current:I mA OUT Figure 1. Application Circuit Figure 2. Efficiency Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0Q1Q04000300-1-2 2016 ROHM Co., Ltd. All rights reserved. 1/20 TSZ22111 14 001 21.Feb.2019 Rev.003 Efficiency % BU33UV7NUX Pin Configuration (TOP VIEW) INTLDO 1 10 VIN AGND 2 9 PGND FB 3 8 SW EN 4 7 VOUT RSTB 5 6 MODE EXP-PAD Figure 3. Pin Configuration Pin Descriptions Pin No. Pin Name Function 1 INTLDO Internal power supply 2 AGND GND 3 FB Output feedback EN= VIN: Power-ON 4 EN EN=GND: Power-OFF 5 RSTB Low battery detection MODE = VIN: Auto-PFM/PWM 6 MODE MODE =GND: Fixed PFM 7 VOUT Boost voltage output 8 SW Inductor connection 9 PGND Power GND 10 VIN Power supply - EXP-PAD The EXP-PAD is not connected any other pins inside the package. (Note) Do not use the EN and MODE pin at open. Block Diagram Reset circuit + VIN Detect Voltage 1.5V - V IN Release Voltage 1.9V V IN LDO INTLDO + RSTB - VOUT OVP V IN SWP CONTROL LOGIC LEVEL V DRIVER IN MODE SW SHIFT ENB SWN EN TSD FB OSC + + ENB - - AGND PGND Figure 4. Circuit Block www.rohm.com TSZ02201-0Q1Q04000300-1-2 2016 ROHM Co., Ltd. All rights reserved. 2/20 TSZ22111 15 001 21.Feb.2019 Rev.003