TLV62090_15 Datasheet, PDF (1/28 Pages) Texas Instruments – TLV62090 3A High Efficient Synchronous Step Down Converter with DCS™ Control

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TLV62090
SLVSBB9D – MARCH 2012 – REVISED SEPTEMBER 2015
TLV62090 3A High Efficient Synchronous Step Down Converter with DCS™ Control
1 Features
•1 2.5 V to 5.5 V Input Voltage Range
• DCS™ Control
• 95% Converter Efficiency
• Power Save Mode
• 20 µA Operating Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• 1.4 MHz Typical Switching Frequency
• 0.8 V to V_IN Adjustable Output Voltage
• Output Discharge Function
• Adjustable Softstart
• Two Level Short Circuit Protection
• Output Voltage Tracking
• Wide Output Capacitance Selection
• Available in 3.00 x 3.00mm 16 Pin VQFN
Package
2 Applications
• Distributed Power Supplies
• Notebook, Netbook Computers
• Hard Disk Drivers (HDD)
• Solid State Drive (SSD)
• Processor Supply
• Battery Powered Applications
3 Description
The TLV62090 device 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 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⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TLV62090
VQFN (16)
3.00mm x 3.00mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
Vin
2.5V to 5.5V
C1
22mF
TLV62090
12
PVIN
1
SW
11
PVIN
2
SW
10
AVIN
16
VOS
3
DEF
FB ⁵
C3
10nF
13
EN
7
CP
PG ⁴
SS ⁹
8 _CN
AGND ⁶
PGND PGND
14 15
L1
1mH
C4
10nF
R1
200k
Vout
1.8V/3A
C2
22mF
R2
160k
R3
500k
Power Good
Efficiency
100
95
90
85
80
75
70
65
60
55
50
100m
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.