Texas Instruments TPS62852x-Q1 Step-Down Converters
Texas Instruments TPS62852x-Q1 Step-Down Converters are pin-to-pin, 1A, 2A, and 3A, high-efficiency, easy-to-use, synchronous step-down DC-DC converters. These devices are based on a peak current mode control topology and support tight switching frequency variation. These devices are designed for automotive applications such as infotainment and advanced driver assistance systems. Low-resistive switches allow up to 3A continuous output current.
In the Texas Instruments TPS62852x-Q1, the switching frequency is internally fixed at 2.25MHz. The TPS62852x-Q1 automatically selects pulse width modulation (PWM) for higher power demand and pulse frequency mode (PFM) for power saving operation. This selection maintains high efficiency across the whole load range. The device also exists in options with forced PWM in cases where frequency stability requirements dominate. These devices provide a 1% output voltage accuracy over the full temperature range in PWM mode, which helps design power supplies for devices with very tight supply voltage accuracy requirements.
The Texas Instruments TPS62852x-Q1 is available in an 8-pin, 2.0mm × 1.5mm, WSON package.
Features
- AEC-Q100 qualified for automotive applications with a device temperature grade 1 (–40°C to +125°C TA)
- Wettable flanks
- Designed for low EMI requirements, with an optional pseudo-random spread spectrum that reduces peak emissions
- TJ = –40°C to +150°C
- Family of 1A, 2A, and 3A (continuous) converters
- Input voltage range of 2.7V to 6V
- 21µA (typ.) quiescent current
- Shutdown current of 1.5µA (typ.)
- Output voltage from 0.6V to 5.5V
- Output voltage accuracy of ±1% (PWM operation)
- Options of forced PWM or PWM, PFM operation
- 2.25MHz switching frequency in PWM
- Adjustable soft start-up to 10ms
- Precise ENABLE input allows
- User-defined undervoltage lockout
- Exact sequencing
- Active output discharge
- Foldback overcurrent protection (optional)
- Power-good output with window comparator
Applications
- Advanced driver assistance systems (ADAS) camera
- ADAS sensor fusion and surround view ECU
- Hybrid and reconfigurable instrument cluster
- Head unit and telematics control unit
- External audio amplifier
Simplified Schematic
Development Tool
Texas Instruments TPS628523HAQEVM-070 Converter Evaluation Module
Helps users test and evaluate the operation and functionality of the TPS62852x-Q1 buck converters.