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Reference Design
TPS62231-Q1, TPS622314-Q1
SLVSB63A – DECEMBER 2011 – REVISED MARCH 2016
TPS62231x-Q1 3-MHz Ultra-Small Step-Down Converter in 1 × 1.5 SON Package
1 Features
•1 Qualified for Automotive Applications • Up to 3.8-MHz Switch Frequency • Up to 94% Efficiency • Output Peak Current up to 500 mA • Excellent AC and Transient Load Regulation • High PSRR (up to 90 dB) • Small External Output-Filter Components 1 μH
and 4.7 μF • VIN range from 2.05 V to 6 V • Optimized Power Save Mode For Low Output-
Ripple Voltage • Forced PWM Mode Operation • Typical 22-μA Quiescent Current • 100% Duty Cycle for Lowest Dropout • Small 1 × 1.5 × 0.6-mm3 SON Package • 12-mm2 Minimum Solution Size • Supports 0.6-mm Maximum Solution Height • Soft Start With 100-μs (Typical) Start-Up Time
2 Applications
• Advanced Driver-Assistance System (ADAS) – Front Camera, Rear View Camera – Surround View – Blind-Spot Monitoring
• Automotive Telematics, eCall, and Tolling • Space-Optimized Automotive and Industrial Power
Systems
3 Description
The TPS6223x-Q1 device family is a high-frequency, synchronous step-down DC-DC converter ideal for space-optimized automotive and industrial applications. The device supports up to 500-mA output current and allows the use of tiny and low-cost chip inductors and capacitors.
With a wide input-voltage range of 2.05 V to 6 V, the device can be powered by a preregulated voltage rail or Li-Ion batteries with extended voltage range. Two different fixed-output voltage versions are available at 1.5 V and 1.8 V.
The TPS6223x-Q1 series features switch frequency up to 3.8 MHz. At medium to heavy loads, the converter operates in PWM mode and automatically enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range.
Because of its excellent PSRR and AC load regulation performance, the device is also suitable to replace linear regulators to obtain better power conversion efficiency.
The Power Save Mode in TPS6223x-Q1 reduces the quiescent current consumption down to 22 μA during light load operation. It is optimized to achieve very low output voltage ripple even with small external component and features excellent AC load regulation.
For noise-sensitive applications, the device can be forced to PWM Mode operation over the entire load range by pulling the MODE pin high. In the shutdown mode, the current consumption is reduced to less than 1 μA. The TPS6223x-Q1 is available in a 1-mm × 1.5-mm2 6-pin SON package.
Device Information(1)
PART NUMBER
OUTPUT VOLTAGE
FREQUENCY
TPS62231-Q1
1.8 V
3 MHz
TPS622314-Q1
1.5 V
3 MHz
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Typical Application Schematic
VIN 2.05 V to 6 V
TPS62231-Q1
L 1 µH or 2.2 µH
VIN SW
CIN 2.2 µF
EN MODE
FB GND
COUT 4.7 µF
VOUT 1.8 V
C1
Small PCB Layout Size
L1 V
IN
Total area is less than 12mm²
GND
C2 V
OUT
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS62231-Q1, TPS622314-Q1
SLVSB63A – DECEMBER 2011 – REVISED MARCH 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 pPin Configuration and Functions....................... 3 6 Specifications......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3 6.2 ESD Ratings.............................................................. 4 6.3 Recommended Operating Conditions....................... 4 6.4 Thermal Information .................................................. 4 6.5 Electrical Characteristics........................................... 5 6.6 Typical Characteristics .............................................. 6 7 Detailed Description .............................................. 7 7.1 Overview ................................................................... 7 7.2 Functional Block Diagram ......................................... 7 7.3 Feature Description................................................... 8 7.4 Device Functional Modes.......................................... 8
8 Application and Implementation ........................ 10 8.1 Application Information............................................ 10 8.2 Typical Application .................................................. 10
9 Power Supply Recommendations...................... 16 10 Layout....................................