TPS62350, TPS62351
TPS62352, TPS62353
CSP-12
QFN-10
TPS62354, TPS62355, TPS62356
www.ti.com .............................................................................................................................................................. SLVS540E–MAY 2006–REVISED APRIL 2008
800-mA / 1000-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER
WITH I2C™ COMPATIBLE INTERFACE IN CHIP SCALE PACKAGING
1
FEATURES
DESCRIPTION
234
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88% Efficiency at 3-MHz Operation
800-mA Output Current at VI = 2.7 V
3-MHz Fixed Frequency Operation
Best in Class Load and Line Transient
Complete 1-mm Component Profile Solution
±2% PWM DC Voltage Accuracy
35-ns Minimum On-Time
•
The TPS6235x device is
a
high-frequency
synchronous step-down dc-dc converter optimized for
battery-powered portable applications. Intended for
low-power applications, the TPS6235x supports up to
800-mA load current and allows the use of small, low
cost inductors and capacitors.
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•
•
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The device is ideal for mobile phones and similar
portable applications powered by a single-cell Li-Ion
battery. With an output voltage range adjustable via
I2C interface down to 0.6 V, the device supports
low-voltage DSPs and processors core power
supplies in smart-phones, PDAs, and handheld
computers.
Efficiency Optimized Power-Save Mode
(Light PFM)
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Transient Optimized Power-Save Mode
(Fast PFM)
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28-µA Typical Quiescent Current
I2C Compatible Interface up to 3.4 Mbps
Pin-Selectable Output Voltage
The TPS6235x operates at 3-MHz fixed switching
frequency and enters the efficiency optimized
power-save mode operation at light load currents to
maintain high efficiency over the entire load current
range. In the shutdown mode, the current
consumption is reduced to less than 2 µA.
Synchronizable On the Fly to External
Clock Signal
•
Available in a 10-Pin QFN (3 x 3 mm) and
12-Pin NanoFree™ (CSP) Packaging
The serial interface is compatible with Fast/Standard
and High-Speed mode I2C specification allowing
transfers at up to 3.4 Mbps. This communication
interface is used for dynamic voltage scaling with
voltage steps down to 12.5 mV, for reprogramming
the mode of operation (Light PFM, Fast PFM or
Forced PWM) or disable/enabling the output voltage.
APPLICATIONS
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SmartReflex™ Compliant Power Supply
Split Supply DSPs and µP Solutions
OMAP™, XSCALE™
Cell Phones, Smart-Phones
PDAs, Pocket PCs
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Digital Cameras
Micro DC-DC Converter Modules
EFFICIENCY vs LOAD CURRENT
TYPICAL APPLICATION
100
90
TPS62350YZG
PVIN
AVIN
V
FB
I
80
V
O
C1
SW
70
60
50
40
30
20
10
0
L1
1 mH
PGND
PGND
C2
10 mF
2.7 V .. 5.5 V
A
AGND
A
EN
V
= Roof
O
V
V
= 3.6 V
VSEL
I
V
= Floor
2
O
= 1.35 V
O
SDA
SCL
I C Bus
LPFM/PWM Mode
up to 3.4 Mbips
0.1
1
10
100 1000
SYNC
I
− Output Current − mA
O
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.
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3
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NanoFree, SmartReflex, OMAP, PowerPAD are trademarks of Texas Instruments.
XSCALE is a trademark of Intel Corporation.
I2C is a trademark of Philips Corporation.
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 © 2006–2008, Texas Instruments Incorporated