TPS62085_14 Datasheet, PDF (1/20 Pages) Texas Instruments – 3-A Step-Down Converter with Hiccup Short Circuit Protection in 2x2 QFN Package

www.ti.com
TPS62085
TPS62086
TPS62087
SLVSB70 – OCTOBER 2013
3-A Step-Down Converter with Hiccup Short Circuit Protection in 2x2 QFN Package
Check for Samples: TPS62085, TPS62086, TPS62087
FEATURES
1
•2 DCS-Control™ Topology
• Up to 95% Efficiency
• Hiccup Short Circuit Protection
• Power Save Mode for Light Load Efficiency
• 100% Duty Cycle for Lowest Dropout
• 2.5-V to 6.0-V Input Voltage Range
• 17-μA Operating Quiescent Current
• 0.8-V to V_IN Adjustable Output Voltage
• 1.8-V and 3.3-V Fixed Output Voltage
• Output Discharge
• Power Good Output
• Thermal Shutdown Protection
• Available in 2-mm x 2-mm QFN Package
APPLICATIONS
• Battery Powered Application
• Point of Load
• Processor Supply
• Hard Disk Drives
DESCRIPTION
The TPS62085, TPS62086, and TPS62087 device
family are high frequency synchronous step-down
converters optimized for small solution size and high
efficiency. With an input voltage range of 2.5 V to
6.0 V, common battery technologies are supported.
The devices focus on high efficiency step-down
conversion over a wide output current range. At
medium to heavy loads, the converter operates in
PWM mode and automatically enters Power Save
Mode operation at light load to maintain high
efficiency over the entire load current range.
To address the requirements of system power rails,
the internal compensation circuit allows a large
selection of external output capacitor values ranging
from 10-µF to 150-µF capacitance. Together with its
DCS-Control architecture excellent load transient
performance and output voltage regulation accuracy
are achieved. The devices are available in a 2-mm x
2-mm QFN package.
V_IN
2.5V to 6V _C1
10µF
TPS62087
VIN
SW
EN
VOS
FB
GND
PG
L1
0.47µH
R3
1M
C2
22µF
V_OUT
1.8V/3A
POWER GOOD
Figure 1. Typical Application
100
90
80
70
60
Vout = 1.8 V
50
0.001
0.010
0.100
Iout (A)
Vin = 2.5V
Vin = 3.3V
Vin = 4.2V
Vin = 5.0V
1.000
C004
Figure 2. Typical Application Efficiency
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.
DCS-Control is a trademark of Texas Instruments.
2
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 © 2013, Texas Instruments Incorporated