Automotive 2.25-MHz Fixed VOUT Dual Step-Down Converters
The TPS624xx-Q1 family of devices from Texas Instruments are synchronous dual step-down dc-dc converters for automotive applications such as Advanced Driver Assistance Systems (ADAS). They provide two independent output voltage rails powered by a standard 3.3-V or 5-V voltage rail, with fixed output voltages optimized for powering the CMOS imager or serializer-deserializer in ADAS camera modules.
The EasyScale™ serial interface allows output voltages modification during operation. The fixed output-voltage versions TPS624xx-Q1 support one-pin-controlled simple dynamic voltage scaling for low-power processors.
The TPS624xx-Q1 family of devices operates at 2.25-MHz fixed switching frequency and enters the power-save mode operation at light load currents to maintain high efficiency over the entire load-current range.
For low-noise applications, one can force the devices into fixed-frequency PWM mode by pulling the MODE/DATA pin high. The shutdown mode reduces the current consumption to 1.2-μA, typical. The devices allow the use of small inductors and capacitors to achieve a small solution size. These dual step-down dc-dc converters are packaged in a 3mm x 3mm VSON(10) package.
Summary of features:
- Qualified for Automotive Applications
- AEC-Q100 Qualified with the Following Results:
- Device Temperature Grade 1: –40°C to 125°C Operating Junction Temperature Range
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C4B
- High Efficiency—Up to 95%
- VIN Range From 2.5 V to 6 V
- 25-MHz Fixed-Frequency Operation
- Output Current TPS62406-Q1 1000mA/400mA
- Output Current TPS62407-Q1 400mA/600mA
- Output Current TPS62422-Q1 1000mA/600mA
- Output Current TPS62423-Q1 800mA/800mA
- Output Current TPS62424-Q1 800mA/800mA
- Fixed output voltages
- EasyScale™ Optional One-Pin Serial Interface
- Power-Save Mode at Light Load Currents
- 180° Out-of-Phase Operation
- Output-Voltage Accuracy in PWM Mode ±1%
- Typical 32-μA Quiescent Current for Both Converters
- 100% Duty Cycle for Lowest Dropout
