*mydirectindustry

Catalogs
ROHM Semiconductor
3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series

Product catalog summary

General Description: The BD9P1x5EFV-C Series is a current mode synchronous buck DC/DC converter designed for automotive applications, integrating POWER MOSFETs and featuring Nano Pulse Control™ technology.

Features: Key features include AEC-Q100 qualification, a minimum ON pulse of 50 ns, soft start function, current mode control, reset function, low quiescent current, light load mode, forced PWM mode, phase compensation, selectable spread spectrum switching, external synchronization, over current protection, input under voltage lockout, thermal shutdown, output over voltage protection, and short circuit protection.

Applications: Suitable for automotive and consumer power supplies.

Key Specifications: The input voltage range is 3.5 V to 40 V, with an output voltage range of 0.8 V to 8.5 V for BD9P105EFV-C, 3.3 V for BD9P135EFV-C, and 5.0 V for BD9P155EFV-C. The output current is up to 1.0 A, with a switching frequency of 2.2 MHz. The operating temperature range is -40 °C to +125 °C.

Pin Configuration: Detailed pin configurations for different models are provided, including functions for each pin such as enable, power supply input, ground, switching node, and more.

Block Diagram: The block diagram illustrates the internal structure, including components like VREF, OSC, control logic, thermal shutdown, and various comparators and amplifiers.

Description of Blocks: Detailed descriptions of each block are provided, explaining their functions such as power supply regulation, thermal shutdown, mode detection, clock generation, over voltage protection, short circuit protection, and more.

Absolute Maximum Ratings: Lists the maximum ratings for various parameters like input voltage, storage temperature, and junction temperature, along with cautions for exceeding these ratings.

Thermal Resistance: Provides thermal resistance values for different configurations, important for thermal management in design.

Overview: The document provides technical specifications and operational details for the BD9P1x5EFV-C Series, a series of synchronous DC/DC converters developed by ROHM Co., Ltd. It includes information on recommended operating conditions, electrical characteristics, and performance curves.

Specifications: The BD9P1x5EFV-C Series operates with an input voltage range of 3.5V to 40V and an operating temperature range from -40°C to +125°C. The output voltage varies depending on the model: BD9P105EFV-C (0.8V to 8.5V), BD9P135EFV-C (3.3V), and BD9P155EFV-C (5.0V). The output current is up to 1A.

Electrical Characteristics: Key parameters include shutdown current, quiescent current, power-on reset thresholds, and under-voltage lockout thresholds. The document specifies various input and output voltage thresholds and currents for different modes and conditions.

Performance Curves: The document includes graphs showing the relationship between various parameters and temperature, such as shutdown current vs. input voltage, feedback reference voltage vs. temperature, and output voltage vs. temperature for different models.

Function Explanation: The document explains the Nano Pulse Control™ technology, which allows stable voltage control even with short SW ON times. It also describes the Light Load Mode Control and Forced PWM Mode Control, which optimize efficiency under varying load conditions.

PCB and Thermal Considerations: The document provides details on PCB board specifications based on JESD51-3 and JESD51-5, 7 standards, including material, size, and copper pattern thickness. It also discusses thermal vias and their connection to copper patterns across layers.

Light Load Mode and Forced PWM Mode Control: When the output load drops below 200 mA, the device enters a SLEEP state to conserve power, stopping switching operations until the output voltage decreases. Forced PWM mode can be activated to maintain a fixed frequency and reduce ripple voltage, especially useful for good EMI performance.

Enable Control: The device can be shut down via the EN pin. When activated, the internal circuit starts, and the output voltage discharges if the VOUT_DIS pin is connected. The soft start operation begins after a delay, and the device shuts down when the EN voltage is low.

Reset Function: The reset function monitors the FB pin voltage, turning off the MOSFET on the RESET pin when the output voltage is within a specified range. It also activates during over-voltage conditions, ensuring the RESET pin is pulled down appropriately.

External Synchronization Function: The device can synchronize its switching frequency with an external clock signal within a specified range. This function is enabled after the RESET signal is high and deactivates if the clock signal duration exceeds a threshold.

Frequency Division Function: To maintain efficiency, the device skips OFF pulses when the input and output voltages are close, adjusting the ON duty cycle of the SW pin. This ensures the output voltage remains stable.

Spread Spectrum Function: Activating the Spread Spectrum function reduces EMI noise by varying the switching frequency. This function is disabled when the RESET output is low.

VCC_EX Function: This function allows the device to use the output voltage as a power supply for internal circuits, improving efficiency. It operates within a specific voltage range and can be disabled if not needed.

Over Current Protection (OCP): The OCP monitors the average inductor current, limiting the duty cycle if the current exceeds set thresholds. This prevents damage from unexpected incidents.

Short Circuit Protection (SCP): The SCP compares the FB pin voltage with a reference, stopping operation if a short circuit is detected. It restarts after a delay, ensuring the output voltage returns to normal.

Power On Reset (POR)/Under Voltage Lockout Protection (UVLO): These functions prevent malfunction by monitoring VIN and VREG voltages, ensuring the IC starts up correctly and enters standby when voltages fall below thresholds.

Thermal Shutdown (TSD): The IC includes a thermal shutdown circuit to prevent heat damage, activating when the junction temperature exceeds safe limits.

Thermal Shutdown (TSD) Protection: The document describes the TSD mechanism which turns off the POWER MOSFETs when the junction temperature (Tj) exceeds 175°C and restarts the IC with a soft start when Tj falls below 150°C. The TSD circuit is not intended for design use but solely for protecting the IC from heat damage.

Over Voltage Protection (OVP): The IC includes OVP to prevent output voltage increase due to external current injection. When the feedback (FB) voltage exceeds 107.3% of its setting, the IC sinks current from VOUT, and the RESET pin is pulled down. The OVP is released when FB voltage falls below 104.7% of its setting. The document also discusses scenarios like VOUT shorted to the battery line, which can boost VIN voltage beyond maximum ratings.

Component Selection: The document provides guidelines for selecting external components:

Inductor (L1): The inductor value affects ripple current and voltage. A balance between size, cost, and performance is necessary. Recommended inductor ranges are provided based on output voltage and current.
Output Capacitor (COUT): Selection is based on ESR requirements. Ceramic capacitors are preferred for their low ESR and size benefits. The document provides formulas for calculating ripple current and capacitance requirements.
Input Capacitor (CIN, CBLK): These capacitors reduce ripple noise. Ceramic capacitors with specific values are recommended, and the document advises on voltage ratings and layout considerations.
Output Voltage Setting Resistor (RFB1, RFB2): These resistors set the output voltage. The document provides formulas for calculating resistor values and advises on avoiding phase shifts due to parasitic capacitance.

Design Considerations: The document emphasizes the importance of verifying stability and responsiveness in actual applications, considering factors like DC bias, temperature, and layout. It also highlights the need for proper PCB layout to ensure IC operation and prevent issues like startup failure or over-current protection activation.

Specifications and Parameters: The document provides specifications for the BD9P1x5EFV-C series, including input voltage (8V to 18V), output voltage (6.0V, 3.3V, and 5.0V for different models), output current (typical 0.5A, maximum 1.0A), and operating temperature range (-40°C to +125°C).

Component Selection: 1. Bootstrap Capacitor: A 0.1 μF ceramic capacitor should be connected between the BST pin and the SW pin. 2. VREG Capacitor: A 1.0 μF ceramic capacitor should be connected between the VREG pin and GND.

Application Examples: The document includes application examples with reference circuits and parts lists for different configurations, both with and without a π-type filter. The π-type filter is recommended for reducing EMI noise.

Performance Graphs: Graphs illustrate efficiency, input current, frequency characteristics, and response times under various conditions (e.g., different input voltages and output currents).

Automotive Power Supply Line Circuit: An example of an automotive power supply line circuit is provided, featuring a π-type filter for EMI reduction and a TVS for primary protection against load dump surges. A reverse polarity protection diode is also recommended.

Key Recommendations: For EMI noise reduction, a 4.7 μF capacitor is recommended for CF1 and CIN2. Devices for π-type filters should be placed close together for optimal performance.

Revision History: - 01.Oct.2019: Initial release. - 08.Apr.2020: Updates include adding EXP-PAD explanation, changing comments on testing, modifying EN Input Voltage High (Max), and updating component selection and application examples.

Notice and Precautions: - Specific Applications: Consult ROHM for use in high-reliability devices. ROHM disclaims liability for use in such applications without prior agreement. - Quality Control: Products are subject to strict quality control, but failures can occur. Implement safety measures like protection circuits and redundant systems. - Environmental Conditions: Products are not designed for extraordinary environments. Verify performance if used in such conditions. - Radiation: Products are not radiation-proof. - Temperature and Power: Ensure operation within specified temperature and power limits to avoid performance degradation.

Mounting and Circuit Design: - Use appropriate soldering methods and consult ROHM for deviations. - Allow margins for variations in external circuits and components.

Electrostatic and Storage Precautions: - Protect products from electrostatic discharge and store under recommended conditions to maintain performance. - Confirm solderability for products stored beyond recommended periods.

Intellectual Property and Legal Notices: - Information is for reference only and does not guarantee non-infringement of third-party rights. - No license is granted for intellectual property rights, but ROHM will not assert rights against necessary manufacturing or sales.

General Precautions: - Read and understand the document before using ROHM products. - Information is subject to change; verify with ROHM for the latest updates. - ROHM is not liable for inaccuracies or errors in the document.

Catalog excerpts

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-1

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-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 BD9P105EFV-C: 0.8 V to 8.5 V BD9P135EFV-C: 3.3 V (Typ) BD9P155EFV-C: 5.0 V (Typ)  Output Current: OCP_SEL = L 0.5 A (Max) 1.0 A (Max) OCP_SEL = H  Switching Frequency: 2.2 MHz (Typ)  Output Voltage Accuracy: ±1.75 % (-40 °C to +125 °C)  Shutdown Current: 2.1 μA (Typ)  Operating Temperature Range: -40 °C to +125 °C BD9P1x5EFV-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 (BD9P135EFV-C, BD9P155EFV-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

Open the catalog to page 1

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-2

BD9P1x5EFV-C Series Typical Application Circuit - continued CBST RRST VMODE Figure 2. Application Circuit without Discharge Function (BD9P135EFV-C, BD9P155EFV-C) VMODE VSSCG Figure 3. Application Circuit with Discharge Function (BD9P105EFV-C) Figure 4. Application Circuit without Discharge Function (BD9P105EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

Open the catalog to page 2

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-3

EXP-PAD PGND (TOP VIEW) Figure 5. Pin Configuration (BD9P135EFV-C, BD9P155EFV-C) (TOP VIEW) Figure 6. Pin Configuration (BD9P105EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

Open the catalog to page 3

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-4

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...

Open the catalog to page 4

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-5

BD9P1x5EFV-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 (BD9P105EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

Open the catalog to page 5

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-6

BD9P1x5EFV-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 (BD9P135EFV-C, BD9P155EFV-C) www.rohm.com © 2019 ROHM Co., Ltd. All rights reserved. TSZ22111 • 15 • 001

Open the catalog to page 6

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-7

BD9P1x5EFV-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...

Open the catalog to page 7

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-8

BD9P1x5EFV-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 %...

Open the catalog to page 8

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-9

BD9P1x5EFV-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...

Open the catalog to page 9

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-10

BD9P1x5EFV-C Series Recommended Operating Conditions Parameter Operating Temperature Output Voltage for BD9P105EFV-C VVIN, VPVIN Input Voltage SW Minimum OFF Time (VREG = 3.3 V) SW Minimum OFF Time (VREG = 5.0 V) Output Voltage for BD9P155EFV-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...

Open the catalog to page 10

3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive BD9P1x5EFV-C Series-11

BD9P1x5EFV-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...

Open the catalog to page 11

All ROHM Semiconductor catalogs and technical brochures

Archived catalogs

Quasi-resonant AC/DC Converter Built-in 1700 V SiC-MOSFET
36 Pages