TLV62090 Datasheet, PDF (1/23 Pages) Texas Instruments – 3A High Efficient Synchronous Step Down Converter with DCS™ Control

TLV62090
www.ti.com
SLVSBB9B – MARCH 2012 – REVISED APRIL 2012
3A High Efficient Synchronous Step Down Converter with DCS™ Control
Check for Samples: TLV62090
FEATURES
1
•2 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 3x3mm 16 Pin QFN Package
APPLICATIONS
• Distributed Power Supplies
• Notebook, Netbook Computers
• Hard Disk Drivers
• Processor Supply
• Battery Powered Applications
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.
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
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
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.
All trademarks are the property of their respective owners.
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 © 2012, Texas Instruments Incorporated