TPS2500 Datasheet, PDF (1/42 Pages) Texas Instruments – INTEGRATED USB POWER SWITCH WITH BOOST CONVERTER

TPS2500, TPS2501
www.ti.com................................................................................................................................................ SLVS886A – OCTOBER 2008 – REVISED AUGUST 2009
INTEGRATED USB POWER SWITCH WITH BOOST CONVERTER
FEATURES
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•23 Integrated Synchronous Boost Converter and
USB Current-Limit Power Switch
• Light-Load, High-Efficiency Eco-mode™
Control Scheme (TPS2500) or Constant
Frequency (TPS2501)
• 1.8-V to 5.25-V Input Voltage (2.2-V Minimum
Start-Up Voltage)
• Adjustable USB Current Limit
– 130 mA to 1400 mA (Typical)
• Accurate 20% Current Limit at 1.4-A Setting
• Powers up to Two Standard USB Ports
• Auxiliary 5.1-V Output
• Minimal External Components Required
• Fast Overcurrent-Response Time – 5 µs
Typical
• Small 3-mm × 3-mm × 0.9-mm SON-10 Package
• 15-kV / 8-kV System-Level ESD Capable
TYPICAL APPLICATION CIRCUIT
2.2 mH
1.8-V to
5.25-V Input
IN
EN
10 mF
SW
AUX
ENUSB
FAULT
R_FAULT
5 V Auxiliary Load
Power, 100 mA⁽²⁾
22 mF
USB FAULT Flag
R_ILIM
ILIM
GND
USB
PGND
POWER PAD
5 V USB Power
120 mF⁽¹⁾
Data
Data
(1) Requirement for USB applications only;
downstream facing ports should be
bypassed with 120 µF minimum per hub.
(2) Additional current can be supplied from
AUX if <1 A is required for USB ports;
total current should not exceed 1.1 A at
V_IN = 3 V.
5 V USB
Port #1
500 mA
5 V USB
Port #2
500 mA
S0380-02
APPLICATIONS
• Portable Applications Using Single Li+ Cell
• USB Hosts Without Native 5-V Supplies
DESCRIPTION
The TPS2500 and TPS2501 provide an integrated
solution to meet USB 5-V power requirements from a
1.8-V to 5.25-V input supply. The features include a
Hi-Speed USB compliant power output, output switch
enable, current limit, and overcurrent fault reporting.
The 1.8-V to 5.25-V input can be supplied by sources
including dc/dc regulated supplies (e.g., 3.3 V), or
batteries such as single-cell Li+ or three-cell NiCd,
NiMH, or alkaline.
The USB power-switch current limit is programmable
via an external resistor from as low as 130 mA to as
high as 1400 mA (typical). Two standard USB ports
can be supported from a single TPS2500 or TPS2501
at the 1400-mA setting.
Additionally, the boost converter output is available as
an auxiliary 5.1-V output to power additional loads.
The total current supplied by the USB output and the
auxiliary cannot exceed 1148 mA at V_IN = 3 V.
BOOST EFFICIENCY
vs
OUTPUT AUXILIARY CURRENT
0.97
0.95
0.93
0.91
V_IN = 4.5 V
0.89
0.87
V_IN = 3.3 V
0.85
0.83
V_IN = 1.8 V
0.81
0.79
0.77
0
300
600
900
1200
I_O(AUX) − Output Auxiliary Current − mA
1500
G001
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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.
Eco-mode, PowerPAD are trademarks of Texas Instruments.
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All other trademarks are the property of their respective owners.
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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 © 2008–2009, Texas Instruments Incorporated