TPS40021PWPRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TPS40021PWPRG4 is a synchronous buck controller from Texas Instruments supporting voltage-mode PWM control with a 2.25 V to 5.5 V input range. It drives external N-channel MOSFETs and can deliver output currents limited only by the external FETs, making it suitable for high-current DC-DC conversion. Available in a 16-pin TSSOP package, in stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- TPS40021PWPRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Voltage-mode PWM control with 2.25 V to 5.5 V input range covers most low-voltage power rails
- Drives external N-channel MOSFETs for scalable output current beyond integrated solutions
- Synchronous rectification with source and sink capability improves light-load efficiency
- Adjustable soft-start and frequency up to 600 kHz reduces output capacitor size
Applications
TPS40021PWPRG4 is designed for point-of-load DC-DC conversion in computing and networking equipment, where a 2.25 V to 5.5 V input must be converted to processor or memory core voltages with high efficiency. Its source and sink current capability makes it ideal for powering DDR memory termination rails that require bidirectional current flow. The voltage-mode PWM architecture and external MOSFET drive also suit industrial control boards needing a configurable, robust synchronous buck stage.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 2.25V |
| Input Voltage-Nom | 5V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 25A |
| Output Voltage-Max | 4V |
| Output Voltage-Min | 0.7V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 1000kHz |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Taiwan |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does TPS40021PWPRG4 support and what output voltages can it regulate?
TPS40021PWPRG4 accepts an input voltage of 2.25 V to 5.5 V, with a nominal 5 V rail being the most common use case. The output voltage is set by an external resistor divider referenced to the 0.7 V internal reference, enabling output voltages from below 1 V up to just under the input voltage, covering processor core and memory voltages such as 1.0 V, 1.2 V, and 1.5 V.
Why choose TPS40021PWPRG4 for DDR memory termination power supplies?
DDR termination rails must both source and sink current as memory bus states switch. TPS40021PWPRG4 supports this bidirectional source and sink operation natively, unlike simple buck converters. With the switching frequency adjustable up to 600 kHz, the output filter can be sized for low ripple at the 0.75 V DDR termination voltage while keeping the inductor below 1 uH.
How does the 16-pin TSSOP package of TPS40021PWPRG4 influence board layout for switching supplies?
The 16-pin TSSOP package has a 4.4 mm body width and 0.65 mm pin pitch, allowing a compact controller footprint alongside external MOSFETs and passives. Keeping the bootstrap capacitor and gate drive traces short within the TSSOP land pattern reduces switching noise and improves EMI, which matters in dense PCBs running the converter at 300 kHz to 600 kHz.
When is TPS40021PWPRG4 a better fit than an integrated synchronous buck converter?
TPS40021PWPRG4 is preferable when output current requirements exceed 5 A to 10 A and external power MOSFETs can be optimized for the specific Vds and RDS(on) targets. Because the controller is separate, the MOSFET selection can be tuned for a 3.3 V or 5 V input rail independently, enabling efficiencies above 90% at load currents from 1 A to 20 A or more.
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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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