TPS62231-Q1 Datasheet, PDF (1/32 Pages) Texas Instruments – 3 MHz Ultra Small Step Down Converter in 1x1.5 SON Package

TPS62231-Q1
TPS622314-Q1
www.ti.com
SLVSB63 – DECEMBER 2011
3 MHz Ultra Small Step Down Converter in 1x1.5 SON Package
Check for Samples: TPS62231-Q1, TPS622314-Q1
FEATURES
1
• Qualified for Automotive Applications
• 3 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/
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
• Typ. 22 μA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Small 1 × 1.5 × 0.6mm³ SON Package
• 12 mm² Minimum Solution Size
• Supports 0.6 mm Maximum Solution Height
• Soft Start with typ. 100μs Start Up Time
APPLICATIONS
• LDO Replacement
• Portable Audio, Portable Media
• Cell Phones
• Low Power Wireless
• Low Power DSP Core Supply
• Digital Cameras
V_IN
2.05 V - 6 V
C_IN
2.2 mF
TPS62231
VIN
EN
MODE
SW
FB
GND
L
1/2.2 mH
C_OUT
4.7 mF
V_OUT
1.8 V
DESCRIPTION
The TPS6223x-Q1 device family is a high frequency
synchronous step down DC-DC converter optimized
for battery powered portable applications. It 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 supports applications powered by Li-Ion
batteries with extended voltage range. The minimum
input voltage of 2.05 V allows as well the operation
from Li-primary or two alkaline batteries. Different
fixed output voltage versions are available from 1 V to
3.3 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 very 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 1μA. The TPS6223x-Q1 is available in a
1 × 1.5mm² 6 pin SON package.
L1
V
IN
Total area
12mm²
GND
C2
V
OUT
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated