3.5 V to 40 V Input, 2 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P2x5EFV-C Series General Description Key Specifications  Input Voltage Range: 3.5 V to 40 V (Initial startup is 4.0 V or more)  Output Voltage Range BD9P205EFV-C: 0.8 V to 8.5 V BD9P235EFV-C: 3.3 V (Typ) BD9P255EFV-C: 5.0 V (Typ)  Output Current: OCP_SEL = H 1.5 A (Max) OCP_SEL = L 2.0 A (Max) 2.2 MHz (Typ)  Switching Frequency:  Output Voltage Accuracy: ±1.75 % (-40 °C to +125 °C)  Shutdown Current: 2.1 μA (Typ)  Operating Temperature Range: -40 °C to +125 °C BD9P2x5EFV-C Series are current mode synchronous buck DC/DC converter integrating POWER MOSFETs. Nano Pulse Control (Note 1) AEC-Q100 Qualified Minimum ON Pulse 50 ns (Max) Synchronous Buck DC/DC Converter Integrating POWER MOSFETs Soft Start Function Current Mode Control Reset Function Quiescent Current 10 μA (Typ) with 12 V Input to 5.0 V Output Light Load Mode (LLM) Forced Pulse Wide Modulation (PWM) Mode Phase Compensation Included 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) Automotive Powered Supplies Consumer Powered Supplies Typical Application Circuit CBST Figure 1. Application Circuit with Discharge Function (BD9P235EFV-C, BD9P255EFV-C) Nano Pulse Control 〇Product structure : Silicon integrated circuit . www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 14 • 001 〇This product has no designed protection against ra

BD9P2x5EFV-C Series Typical Application Circuit - continued CBST RRST VMODE Figure 2. Application Circuit without Discharge Function (BD9P235EFV-C, BD9P255EFV-C) VMODE VSSCG Figure 3. Application Circuit with Discharge Function (BD9P205EFV-C) Figure 4. Application Circuit without Discharge Function (BD9P205EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

EXP-PAD PGND (TOP VIEW) Figure 5. Pin Configuration (BD9P235EFV-C, BD9P255EFV-C) (TOP VIEW) Figure 6. Pin Configuration (BD9P205EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001 Function Enable pin. Apply low level (0.8 V or lower) to disable device and apply high level (2.0 V or higher) to enable device. This pin must not be left open. If this pin is connected to other devices, it is recommended to insert a current limiting resistor to avoid damages caused by a short between pins. Power supply input pins for the internal circuit. Connect this pin to the PVIN pins. Power supply input pins that are used for the output stage of the switching regulator. Connect input ceramic capacitors referring...

BD9P2x5EFV-C Series Block Diagram VCC_EX VREG tsdout vout_det vout_dis VREF HOCP Comp Soft Start Control Logic sleep VREF Current Sense Reset PGND VREF VOUT_SNS EN porout uvloout tsdout Figure 7. Block Diagram (BD9P205EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

BD9P2x5EFV-C Series Block Diagram - continued VREG tsdout OCP_SEL VREF HOCP Comp Soft Start Control Logic sleep VREF Current Sense VREF Reset PGND VREF EN porout uvloout tsdout Figure 8. Block Diagram (BD9P235EFV-C, BD9P255EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

BD9P2x5EFV-C Series Description of Blocks - PreReg This block is the internal power supply for TSD and VREF circuits. VREG This block is the internal power supply circuit. It outputs 3.3 V (Typ) and is the power supply to the control circuit and Driver. TSD This is the thermal shutdown circuit. It will shut down the device when the junction temperature (Tj) reaches to 175 °C (Typ) or more. When the Tj falls below the TSD threshold with hysteresis of 25 °C (Typ), the circuits are automatically restored to normal operation. VREF The VREF block generates the internal reference voltage. POR The POR...

BD9P2x5EFV-C Series Description of Blocks - continued - PWM Comp This block compares the output voltage of the GmAmp2 (Vc) and the saw tooth waveform (Vr) to control the switching duty. Ramp This block generates the saw tooth waveform (Vr) from the clock signal generated by OSC. Control Logic This block controls switching operation and protection functions. Driver This circuit drives the gates of the output FETs. Sleep Comp If output/feedback voltage becomes 101.3 % (Typ) or more, this block puts the device into SLEEP state. This state is released when output/feedback voltage becomes 101.0 %...

BD9P2x5EFV-C Series Absolute Maximum Ratings Parameter VVIN, VPVIN Input Voltage VOUT_DIS Voltage ΔVBST VFB, VRESET, VMODE, VSSCG VOCP_SEL VVOUT_DIS VOUT_SNS Voltage BST Voltage Voltage from SW to BST FB, RESET, MODE, SSCG, OCP_SEL Voltage VREG Voltage Storage Temperature Range VCC_EX Voltage Maximum Junction Temperature Human Body Model (HBM) Caution 1: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins and the internal circuitry. Therefore, it is important to consider circuit protection...

BD9P2x5EFV-C Series Recommended Operating Conditions Parameter Operating Temperature Output Voltage for BD9P205EFV-C VVIN, VPVIN Input Voltage SW Minimum OFF Time (VREG = 3.3 V) SW Minimum OFF Time (VREG = 5.0 V) Output Voltage for BD9P255EFV-C (Note 2) Output Current Input Capacitor (Note 3) (VIN Continuous Condition) (Note 3) VREG Capacitor BST Capacitor (Note 1) Although the output voltage is configurable at 0.8 V and higher, it may be limited by the SW min ON pulse width. For the same reason, although the output voltage is configurable at 8.5 V and more, it may be limited by the SW minimum...

BD9P2x5EFV-C Series Electrical Characteristics - continued (Unless otherwise specified Ta = -40 ˚C to +125 ˚C, VIN = 12 V) Parameter VREG Voltage VCC_EX Switch ON Resistance Voltage Follower VVCC_EX = 0 V VVCC_EX = 5 V VCC_EX Threshold Voltage High VCC_EX Threshold Voltage Low VVCC_EX Sweep Down VCC_EX OVP Threshold Voltage High VCC_EX OVP Threshold Voltage Low VOUT_DIS Discharge ON Resistance VOUT Discharge Deactivate Voltage MHz External Clock Input MHz VSSCG = 5 V VEN = 0 V, VOUT_DIS = 0.3 V VOUT_DIS Sweep Down Oscillator Switching Frequency Synchronization Frequency Range Switching Frequency...