TPS54326RGTR ,4.5V to 18V Input, 3A Synchronous Step-Down Converter with Eco-Mode? 16-QFN -40 to 85ELECTRICAL CHARACTERISTICSover operating free-air temperature range, V , V = 12V (unless otherwise ..
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TPS54326-TPS54326PWPR-TPS54326RGTR-TPS54326RGTT
(50 mV/div)OUT (1A/div)
TPS54326
www.ti.com SLVSA13E –OCTOBER 2009–REVISED JUNE 2012
4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode™
Checkfor Samples: TPS54326
1FEATURES DESCRIPTIONThe TPS54326is an adaptive on-time D-CAP2™
23• D-CAP2™ Mode Enables Fast Transient mode synchronous buck converter. The TPS54326
Response enables system designersto complete the suiteof
• Low Output Ripple and Allows Ceramic Output various end equipment’s power bus regulators witha
Capacitor cost effective, low component count, low standby
current solution. The main control loop for the
• Wide VCC Input Voltage Range: 4.5Vto18VTPS54326 uses the D-CAP2™ mode control which
• Wide VIN Input Voltage Range:2Vto18V providesa fast transient response with no external
• Output Voltage Range: 0.76Vto 5.5V components. The adoptive on-time control supports
Highly Efficient Integrated FET’s Optimized seamless operation between PWM modeat heavy
load condition and reduced frequency Eco-mode™
for Lower Duty Cycle Applicationsoperationat light loadfor high efficiency.
- 120 mΩ (High Side) and70 mΩ (Low Side) High Efficiency, less than10 μAat Shutdown The TPS54326 also hasa proprietary circuit that
enables the deviceto adaptto both low equivalent
• Auto-Skip Eco-mode™ for High Efficiencyat series resistance (ESR) output capacitors, such as
Light Load POSCAP or SP-CAP, and ultra-low ESR ceramic
• High Initial Bandgap Reference Accuracy capacitors. The device operates from 4.5-Vto 18-V
Adjustable Soft Start VCC input, and from 2-Vto 18-V VIN input power
supply voltage. The output voltage can be
• Pre-Biased Soft Start programmed between 0.76V and 5.5V. The device
• 700-kHz Switching Frequency (fSW) also features an adjustable slow start time anda
Cycle-By-Cycle Overcurrent Limit power good function. The TPS54326is availablein
the 14 pin HTSSOPor 16 pin QFN package, and
• Power Good Output designedto operate from –40°Cto 85°C.
APPLICATIONS Wide Rangeof Applications for Low Voltage
System Digital TV Power Supply High Definition Blu-ray Disc™ Players Terminal
