TPS40057ZPWPR Texas Instruments In Stock
TPS40057ZPWPR is a wide-input synchronous buck PWM controller by Texas Instruments. Key specs: 4.5 V to 28 V input range, up to 600 kHz switching frequency, HTSSOP-20 package. Available from global distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Wide input voltage range of 4.5 V to 28 V supporting diverse power rail architectures in telecom and industrial systems
- Adjustable switching frequency up to 600 kHz enabling smaller external inductors and capacitors for compact power supply designs
- Synchronous rectification control with gate drive outputs for both high-side and low-side MOSFETs, maximizing conversion efficiency
- HTSSOP-20 thermally enhanced package providing improved heat dissipation for high-current step-down converter applications
Applications
The TPS40057ZPWPR is designed for point-of-load synchronous buck converter designs in telecom infrastructure, server power supplies, and industrial automation equipment operating from 4.5 V to 28 V bus rails. It drives external N-channel MOSFETs at up to 600 kHz switching frequency, enabling compact, high-efficiency step-down regulators delivering output currents exceeding 10 A. Its programmable soft-start, current limiting, and overvoltage protection features make it suitable for safety-critical power conversion stages in rack-mounted and embedded computing systems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TPS40057ZPWPR:
Switching Controller, Voltage-mode, 20A, 1000kHz Switching Freq-Max, PDSO16
Switching Controller, Voltage-mode, 20A, 1000kHz Switching Freq-Max, PDSO16
Switching Controller, Voltage-mode, 20A, 1000kHz Switching Freq-Max, PDSO16
Switching Controller, Voltage-mode, 20A, 1000kHz Switching Freq-Max, PDSO16
Switching Controller, Voltage-mode, 20A, 1000kHz Switching Freq-Max, PDSO16
Frequently Asked Questions
What input voltage range does the TPS40057ZPWPR support for synchronous buck converter designs?
The TPS40057ZPWPR supports an input voltage range of 4.5 V to 28 V, covering common telecom intermediate bus voltages of 12 V and 24 V as well as 5 V logic rails. This wide range allows a single controller design to be reused across multiple power supply platforms without board-level changes to the control circuit.
How does the TPS40057ZPWPR's adjustable switching frequency affect output filter component sizing?
By setting the switching frequency up to 600 kHz through an external resistor, the TPS40057ZPWPR enables designers to use smaller inductors (often below 1 µH) and output capacitors compared to a fixed 200 kHz design. Higher frequency reduces peak inductor current ripple for a given inductance and shrinks the output filter footprint, which is critical in space-constrained server blade and embedded computing designs.
For a 12 V to 1.8 V conversion at 10 A load, which protection features does TPS40057ZPWPR provide?
The TPS40057ZPWPR includes programmable soft-start limiting inrush current during startup, cycle-by-cycle current limiting protecting external MOSFETs during overload events, and overvoltage protection shutting down the converter if the output exceeds a set threshold above 1.8 V. These 3 protection mechanisms reduce the risk of component damage and ensure safe operation across the full 10 A load range.
How does the HTSSOP-20 package of TPS40057ZPWPR improve thermal performance compared to a standard TSSOP?
The HTSSOP-20 (thermally enhanced TSSOP) includes an exposed metal pad on the bottom of the package, reducing junction-to-board thermal resistance to approximately 25°C/W compared to over 100°C/W for a standard TSSOP. In high-frequency switching designs at 600 kHz where gate drive dissipation can exceed 500 mW, this thermal improvement keeps die temperature within safe operating limits without a separate heatsink.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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