TM Nano Pulse Control Datasheet 3.5 V to 40 V Input, 2 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P2x5MUF-C Series General Description Key Specifications BD9P2x5MUF-C Series are current mode synchronous Input Voltage Range: 3.5 V to 40 V buck DC/DC converter integrating POWER MOSFETs. (Initial startup is 4.0 V or more) Output Voltage Range Features BD9P205MUF-C: 0.8 V to 8.5 V TM Nano Pulse Control BD9P235MUF-C: 3.3 V (Typ) (Note 1) AEC-Q100 Qualified BD9P255MUF-C: 5.0 V (Typ) Minimum ON Pulse 50 ns (Max) Output Current: Synchronous Buck DC/DC Converter Integrating OCP SEL = H 1.5 A (Max) POWER MOSFETs OCP SEL = L 2.0 A (Max) Soft Start Function Switching Frequency: 2.2 MHz (Typ) Current Mode Control Output Voltage Accuracy: Reset Function 1.75 % (-40 C to +125 C) Quiescent Current 10 A (Typ) Shutdown Current: 2.1 A (Typ) with 12 V Input to 5.0 V Output Operating Temperature Range: -40 C to +125 C Light Load Mode (LLM) Forced Pulse Wide Modulation (PWM) Mode Package W (Typ) x D (Typ) x H (Max) Phase Compensation Included VQFN20FV4040 4.0 mm x 4.0 mm x 1.0 mm Selectable Spread Spectrum Switching External Synchronization Function Selectable Over Current Protection (OCP) Input Under Voltage Lockout (UVLO) Protection Thermal Shut Down (TSD) Protection Output Over Voltage Protection (OVP) Short Circuit Protection (SCP) Enlarged View (Note 1) Grade 1 Applications Automotive Powered Supplies Consumer Powered Supplies VQFN20FV4040 Wettable Flank Package Typical Application Circuit C BST V IN VIN BST V OUT L 1 SW PVIN VCC EX C IN EN VOUT DIS PGND VOUT SNS C OUT R RST RESET VREG C REG V MODE MODE OCP SEL V SSCG SSCG GND Figure 1. Application Circuit with Discharge Function (BD9P235MUF-C, BD9P255MUF-C) TM Nano Pulse Control is a trademark or a registered trademark of ROHM Co., Ltd. Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays .w ww.rohm.com TSZ02201-0J1J0AL01510-1-2 2019 ROHM Co., Ltd. All rights reserved. 1/57 TSZ22111 14 001 28.Apr.2020 Rev.001 BD9P2x5MUF-C Series Typical Application Circuit - continued C BST V IN VIN BST V OUT L 1 SW PVIN VCC EX C IN EN VOUT DIS PGND C VOUT SNS OUT R RST RESET VREG C REG MODE V MODE OCP SEL V SSCG SSCG GND Figure 2. Application Circuit without Discharge Function (BD9P235MUF-C, BD9P255MUF-C) C BST V IN VIN BST V OUT L 1 SW PVIN VCC EX R FB1 C EN IN FB PGND VOUT SNS C OUT R RST RESET VREG C REG R V FB2 MODE MODE OCP SEL V SSCG SSCG GND Figure 3. Application Circuit (BD9P205MUF-C) Note: The difference between BD9P205MUF-C, BD9P235MUF-C and BD9P255MUF-C The VOUT DIS pin and discharge function are not available with BD9P205MUF-C. The FB pin is assigned on the BD9P205MUF-C and the resistors dividing the output voltage are connected. The output voltage is defined by the resistors (RFB1, RFB2). The VOUT discharge function are available with BD9P235MUF-C and BD9P255MUF-C, and connect the VOUT DIS pin to VOUT. And connect the VOUT to the VOUT SNS pin. L L 1 1 V V OUT OUT SW SW VOUT DIS C C OUT OUT VOUT SNS VOUT SNS R FB1 FB R FB2 (BD9P205MUF-C) (BD9P235MUF-C, BD9P255MUF-C) Figure 4. The difference between BD9P205MUF-C, BD9P235MUF-C and BD9P255MUF-C www.rohm.com TSZ02201-0J1J0AL01510-1-2 2019 ROHM Co., Ltd. All rights reserved. 2/57 TSZ22111 15 001 28.Apr.2020 Rev.001