TPS54291 4.5V to 18V input, 1.5/2.5A, 600kHz dual output synchronous buck converter
illustrate
TPS54290/1/2 is a dual output fully synchronous buck converter capable of supporting applications with a minimal number of external components.The TPS54290/1/2 is a dual-output fully synchronous buck converter that can support the smallest number of applications and 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.It operates from 4.5 V to 18 V input supply voltages and supports output voltages as low as 0.8 V and up to 90% of input voltages.
Both high-side and low-side MOSFETs are integrated to provide fully synchronous conversion with higher efficiency.Both the high-side and low-side offer full MOSFET integration with high synchronous conversion efficiency.Channel1 can provide up to 1.5 A of continuous current, meanwhile, Channel2 supports up to 2.5 A.Channel1 can deliver up to 1.5 of one Channel2 continuous current, while supporting up to 250.
Current mode control simplifies the compensation.Current-mode control simplifies compensation.The external compensation adds flexibility for the user to choose different type of output capacitors.External compensation for added flexibility allows the user to select different types 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.Operating 180° reduces out-of-phase ripple current through the input capacitor, providing benefits by reducing input capacitance, mitigating EMI and increasing capacitor life.
characteristiccharacteristic
- 4.5 V to 18 V Input Range4.5 V to 18 V input range
- Output Voltage Range 0.8 V to DMAX × VIN(5) Output voltage range DMAX VIN × 0.8
- Fully Integrated Dual Buck, 1.5 A/2.5 AFully integrated double buck, 1.5 A/2.5 A
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Three Fixed Switching Frequency Versions:Three fixed switching frequency versions:
- TPS54290 – 300 kHzTPS54290 - 300 kHz
- TPS54291 – 600 kHzTPS54291-600 for kilohertz
- TPS54292 – 1.2 MHzTPS54292 - 12 MHz
- Integrated UVLOIntegrated UVLO
- 0.8 VREF With 1% Accuracy (0°C to 85°C)1% increase by 0.8 VREF (0°C accuracy to 85°C)
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Internal Soft-StartInternal Soft-Start
- TPS54290 – 5.2 msLadies TPS54290-520
- TPS54291 – 2.6 msLadies TPS54291 - 2.6
- TPS54292 – 1.3 msLadies TPS54292-13
- Dual PWM Outputs 180° Out-of-Phase180° out-of-phase dual PWM output
- Dedicated Enable for Each ChannelDedicated to each channel on. envoy
- Current Mode Control for Simplified CompensationThe current mode is controlled for simplified compensation
- External CompensationExternal compensation
- Pulse-by-Pulse Overcurrent Protection, 2.2 A/3.8 A Overcurrent LimitPulse-by-Pulse overcurrent protection, 2.2 A/3.8 one overcurrent limit
- Integrated Bootstrap SwitchIntegrated literal switch
- Thermal Shutdown Protection at 145°CProtect C at 145° thermal shutdown