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. TPS54290/1/2 is a dual-output fully synchronous buck converter that can support applications with minimal external components.It operates from 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. Both high-end 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 provide up to 1.5 A of 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 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. Operation at 180° It reduces the ripple current through the input capacitor, providing benefits by decreasing input capacitance, mitigating EMI, and increasing capacitor life.
Characteristics
- 4.5 V to 18 V Input Range: 4.5 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 A
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Three Fixed Switching Frequency Versions: Three fixed switching frequency versions:
- TPS54290 – 300 kHz TPS54290 – 300 kHz
- TPS54291 – 600 kHz TPS54291 – 600
- TPS54292 – 1.2 MHz TPS54292 – 12 MHz
- Integrated UVLO
- 0.8 VREF with 1% Accuracy (0°C to 85°C) Increases by 1% 0.8 VREF (Accuracy from 0°C to 85°C)
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Internal Soft-Start Internal Soft-Start
- TPS54290 – 5.2 ms for women TPS54290 – 520
- TPS54291 – 2.6 ms for women TPS54291 – 2.6
- TPS54292 – 1.3 ms for women TPS54292 13
- Dual PWM Outputs 180° Out-of-Phase 180° Dual PWM Outputs with Different Phases
- Dedicated Enable for Each Channel. Envoy
- Current Mode Control for Simplified Compensation is a simplified form of compensation
- External Compensation
- Pulse-by-Pulse Overcurrent Protection, 2.2 A / 3.8 A Overcurrent Limit. Pulse-by-Pulse Overcurrent Protection, 2.2 A / 3.8 Overcurrent Limit
- Integrated Bootstrap Switch
- Thermal Shutdown Protection at 145°C