TPS62231-Q1_16 Datasheet, PDF (1/25 Pages) Texas Instruments – 3-MHz Ultra-Small Step-Down Converter

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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
• V_IN 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
V_IN
2.05 V to 6 V
TPS62231-Q1
L
1 µH or 2.2 µH
VIN
SW
C_IN
2.2 µF
EN
MODE
FB
GND
C_OUT
4.7 µF
V_OUT
1.8 V
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.