TLV62090_16 Datasheet, PDF (1/27 Pages) Texas Instruments – 3A High Efficiency Synchronous Step-Down Converter

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TLV62090
SLVSBB9E – MARCH 2012 – REVISED JANUARY 2016
TLV62090 3A High Efficiency Synchronous Step-Down Converter with DCS-Control™
1 Features
•1 2.5 V to 5.5 V Input Voltage Range
• DCS-Control™
• Up To 98% 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
• Hiccup Short Circuit Protection
• Output Voltage Tracking
2 Applications
• Distributed Power Supplies
• Notebook, Netbook Computers
• Hard Disk Drives (HDD)
• Solid State Drives (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 pulse width modulation (PWM)
mode with a nominal switching frequency of 1.4 MHz
and it 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 (EN) and power good (PG) pins. In power
save mode, the device operates with typically 20-µA
quiescent current. Power save mode is entered
automatically and seamlessly, maintaining high
efficiency over the entire load current range.
The device is available in a 3 mm x 3 mm 16-pin
VQFN (RGT) package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TLV62090
VQFN (16)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
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spacer
Vin
2.5V to 5.5V
C1
22mF
Typical Application Schematic
TLV62090
L1
1mH
12
1
PVIN
SW
11
PVIN
2
SW
R1
200k
10 _AVIN
3 _DEF
16
VOS
FB ⁵
R2
160k
C5
10nF
13 _EN
7
CP
PG ⁴
SS ⁹
8 _CN
AGND ⁶
PGND PGND
14 15
C4
10nF
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.