TPS54290_15 Datasheet, PDF (1/37 Pages) Texas Instruments – 1.5-A/2.5-A Dual, Fully-Synchronous Buck Converter With Integrated MOSFET

TPS54290, TPS54291, TPS54292
www.ti.com
SLUS973 – OCTOBER 2009
1.5-A/2.5-A Dual, Fully-Synchronous Buck Converter With Integrated MOSFET
Check for Samples :TPS54290 TPS54291 TPS54292
FEATURES
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•2 4.5 V to 18 V Input Range
• Output Voltage Range 0.8 V to D_MAX × V_IN
• Fully Integrated Dual Buck, 1.5 A/2.5 A
• Three Fixed Switching Frequency Versions:
– TPS54290 – 300 kHz
– TPS54291 – 600 kHz
– TPS54292 – 1.2 MHz
• Integrated UVLO
• 0.8 V_REF With 1% Accuracy (0°C to 85°C)
• Internal Soft-Start
– TPS54290 – 5.2 ms
– TPS54291 – 2.6 ms
– TPS54292 – 1.3 ms
• Dual PWM Outputs 180° Out-of-Phase
• Dedicated Enable for Each Channel
• Current Mode Control for Simplified
Compensation
• External Compensation
• Pulse-by-Pulse Overcurrent Protection,
2.2 A/3.8 A Overcurrent Limit
• Integrated Bootstrap Switch
• Thermal Shutdown Protection at 145°C
• 16-Pin PowerPAD™ HTSSOP Package
APPLICATIONS
• Set Top Box
• Digital TV
• Power for DSP
• Consumer Electronics
DESCRIPTION
TPS54290/1/2 is a dual output fully synchronous buck
converter capable of supporting applications with a
minimal number of external components. It operates
from a 4.5 V to 18 V input supply voltage, and
supports output voltages as low as 0.8 V and as high
as 90% of the input voltage.
Both high-side and low-side MOSFETs are integrated
to provide fully synchronous conversion with higher
efficiency. Channel1 can provide up to 1.5 A of
continuous current, meanwhile, Channel2 supports
up to 2.5 A.
Current mode control simplifies the compensation.
The external compensation adds flexibility for the
user to choose different type of output capacitors.
180° out-of-phase operation reduces the ripple
current through the input capacitor, providing the
benefit of reducing input capacitance, alleviating EMI
and increasing capacitor life.
V_IN
V_OUT1
TPS54290
1 PVDD1 PVDD2 16
2 BOOT1 BOOT2 15
3 SW1
SW2 14
4 PGND1 PGND2 13
5 EN1
BP 12
6 EN2
GND 11
7 FB1
FB2 10
8 COMP1 COMP2 9
GND
V_OUT2
UDG-09130
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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.
PowerPAD is a trademark of Texas Instruments.
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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 © 2009, Texas Instruments Incorporated