TPS62590-Q1 Datasheet, PDF (1/25 Pages) Texas Instruments – 1-A Step-Down Converter in 2-mm × 2-mm QFN Package

TPS62590-Q1
www.ti.com
SLVSAO5A – DECEMBER 2010 – REVISED APRIL 2012
1-A Step-Down Converter in 2-mm × 2-mm QFN Package
Check for Samples: TPS62590-Q1
FEATURES
1
• Qualified for Automotive Applications
• Output Current up to 1000 mA
• Input Voltage Range from 2.5 V to 6 V
• Output Voltage Accuracy in PWM mode ±2.5%
• Typ. 15-μA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Available in a 2-mm × 2-mm × 0,8-mm QFN
Package
• For Improved Features Set, See TPS62290
DESCRIPTION
The TPS62590-Q1 device is a high-efficiency
synchronous step-down converter, optimized for
battery-powered portable applications. It provides up
to 1000-mA output current from batteries, such as
single Li-Ion or other common-chemistry AA and AAA
cells.
With an input voltage range of 2.5 V to 6 V, the
device is targeted to power a large variety of portable
handheld equipment or POL applications.
The TPS62590-Q1 family operates at a 2.25-MHz
fixed switching frequency and enters a power-save
mode at light load currents to maintain a high
efficiency over the entire load current range.
The power-save mode is optimized for low output-
voltage ripple. For low-noise applications, the device
can be forced into fixed-frequency PWM mode by
pulling the MODE pin high. In the shutdown mode,
the current consumption is reduced to less than 1 µA.
The TPS62590-Q1 allows the use of small inductors
and capacitors to achieve a small solution size.
The TPS62590-Q1 is available in a 2-mm × 2-mm 6-
pin QFN package.
Empty para
V_{I N}
2.5 V to 5.5 V
C_IN
10mF
TPS62590DRV
5 _VIN
SW ¹
L
2.2 mH
4
EN
2
MODE
FB 3
GND ⁶
PwrPAD
R1
R2
Typical Application
C1
22pF
V_OUT
0.75 V to V_IN
C_OUT
10mF
100
90
80
V_I = 5 V
70
V_I = 4.2 V
60
V_I = 3.8 V
50
40
30
V_OUT = 3.3 V,
20
MODE = GND,
10
0
0.0001
0.001
0.01
0.1
1
I_O - Output Current - A
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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 © 2010–2012, Texas Instruments Incorporated