TPS62260-Q1_16 Datasheet, PDF (1/34 Pages) Texas Instruments – 2.25-MHz 600-mA STEP-DOWN CONVERTERS

www.ti.com
TPS62260-Q1, TPS62261-Q1
TPS62262-Q1, TPS62263-Q1
SLVSA16C – AUGUST 2009 – REVISED JULY 2012
2.25-MHz 600-mA STEP-DOWN CONVERTERS
Check for Samples: TPS62260-Q1, TPS62261-Q1, TPS62262-Q1, TPS62263-Q1
FEATURES
1
•2 Qualified for Automotive Applications
• High-Efficiency Step-Down Converter
• Output Current up to 600 mA
• Wide V_IN Range from 2-V to 6-V for Li-Ion
Batteries with Extended Voltage Range
• 2.25-MHz Fixed Frequency Operation
• Power Save Mode at Light Load Currents
• Output Voltage Accuracy in PWM Mode ±1.5%
• 15-μA (Typ) Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Soft Start
• Voltage Positioning at Light Loads
• Available in a Small 2×2×0,8-mm SON Package
• Allows <1-mm Solution Height
APPLICATIONS
• PDAs, Pocket PCs
• Low Power DSP Supply
• Portable Media Players
• POL applications
DESCRIPTION
The TPS6226x devices are high-efficiency synchronous step-down dc-dc converters optimized for battery
powered applications. It provides up to 600-mA output current from a single Li-Ion cell and is ideal to power
mobile phones and other portable applications.
With an wide input voltage range of 2 V to 6 V, the device supports applications powered by Li-Ion batteries with
extended voltage range, two and three cell alkaline batteries, 3.3-V and 5-V input voltage rails.
The TPS6226x operates at 2.25-MHz fixed switching frequency and enters Power Save Mode operation at light
load currents to maintain 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. TPS6226x allows the use of small inductors and capacitors to achieve
a small solution size.
The TPS6226x is available in a very small 2×2mm 6-pin SON package.
V_IN = 2V to 6V
C_IN
4.7 mF
TPS62260DRV
V_IN
SW
EN
GND
FB
MODE
L
2.2 mH
R₁
R₂
C₁
22 pF
Up to 600mA
V_OUT
C_OUT
10 mF
100 _{VIN = 2.3 V}
90 _{VIN = 2.7 V}
80 V_IN = 3 V
70
V_IN = 3.6 V
60
V_IN = 4.5 V
50
40
30
20
10
0
0.01
V_OUT = 1.8 V,
MODE = GND,
L = 2.2 mH,
DCR 110 mR
0.1
1
10
100
I_O - Output Current - mA
1000
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.
PowerPAD is a trademark of Texas Instruments.
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 © 2009–2012, Texas Instruments Incorporated