TPS62090_15 Datasheet, PDF (1/28 Pages) Texas Instruments – TPS6209x 3A High Efficient Synchronous Step Down Converter with DCS™ Control

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TPS62090, TPS62091, TPS62092, TPS62093
SLVSAW2B – MARCH 2012 – REVISED APRIL 2014
TPS6209x 3A High Efficient Synchronous Step Down Converter with DCS™ Control
1 Features
•1 2.5 V to 6 V Input Voltage Range
• DCS™ Control
• 95% Converter Efficiency
• Power Save Mode
• 20 µA Operating Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• 2.8 MHz/1.4 MHz Typical Switching Frequency
• 0.8 V to V_IN Adjustable Output Voltage
• Fixed Output Voltage Versions
• Output Discharge Function
• Adjustable Softstart
• Two Level Short Circuit Protection
• Output Voltage Tracking
• Wide Output Capacitance Selection
2 Applications
• Distributed Power Supplies
• Notebook, Netbook Computers
• Hard Disk Drivers (HDD)
• Solid State Drives (SSD)
• Processor Supply
• Battery Powered Applications
3 Description
The TPS6209x device family is a high frequency
synchronous step down converter optimized for small
solution size, high efficiency and suitable for battery
powered applications. To maximize efficiency, the
converter operates in PWM mode with a nominal
switching frequency of 2.8 MHz/1.4 MHz and
automatically enters Power Save Mode operation at
light load currents. When used in distributed power
supplies and point of load regulation, the device
allows voltage tracking to other voltage rails and
tolerates output capacitors ranging from 10 µF up to
150 µF and beyond. Using the DCS™ Control
topology the device achieves excellent load transient
performance and accurate output voltage regulation.
The output voltage start-up ramp is controlled by the
softstart pin, which allows operation as either a
standalone power supply or in tracking configurations.
Power sequencing is also possible by configuring the
Enable and Power Good pins. In Power Save Mode,
the device operates at typically 20 µA quiescent
current. Power Save Mode is entered automatically
and seamlessly maintaining high efficiency over the
entire load current range.
Device Information⁽¹⁾
DEVICE NAME
PACKAGE
BODY SIZE
TPS62090
TPS62091
TPS62092
QFN (16)
3mm x 3mm
TPS62093
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
Vin
2.5V to 6V
C1
10mF
C3
10nF
C4
10nF
TPS62090
12
PVIN
1
SW
11
PVIN
2
SW
10 _AVIN
16
VOS
13 _EN
FB ⁵
7
CP
8 _CN
PG ⁴
3
FREQ
9 _SS
AGND ⁶
PGND PGND
14 15
L1
470nH
Vout
1.8V/3A
C2
22mF
R3
500k
Power Good
100
95
90
85
80
75
70
65
60
55
50
100m
Efficiency vs Output Current
V_OUT = 3.3 V
L = 1 µH
f = 1.4 MHz
1
10
100
I load (mA)
V_IN = 3.7 V
V_IN = 4.2 V
V_IN = 5 V
1k
10k
G002
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.