TPS40091RHDTG4 Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
TPS40091RHDTG4 is a high-current synchronous buck controller supporting up to 120 A output current, operating from 4.5 V to 15 V input with voltage-mode or current-mode PWM control in a 28-pin QFN package. Designed for high-density server, telecom, and industrial point-of-load DC-DC power supplies.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- OBSOLETE
- Datasheet
- TPS40091RHDTG4 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
- Supports up to 120 A output current for high-current point-of-load converters
- Dual control mode: voltage-mode PWM with optional current-mode operation
- Input voltage range of 4.5 V to 15 V with 12 V nominal for telecom and server rails
- 28-pin QFN package for thermally efficient, compact power supply PCB layouts
- Programmable switching frequency for optimizing efficiency across load conditions
- Precision enable, soft-start, and PGOOD functions for sequenced power-up
Applications
TPS40091RHDTG4 drives high-current synchronous buck converters in server motherboards, FPGA core power stages, and telecom blades where 12 V bus input must be stepped down to 1 V to 3.3 V at up to 120 A. It is used in data center power distribution units and industrial motor control power stages that demand flexible voltage-mode or current-mode control with programmable switching frequency. The 28-pin QFN package allows dense multi-phase power module designs on compact PCBs with good thermal dissipation to the ground plane.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | IT CAN ALSO OPERATE WITH CURRENT MODE |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | VOLTAGE-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 15V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PQCC-N28 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Voltage-Max | 3.5V |
| Output Voltage-Min | 0.7V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC28,.2SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | PHASE-SHIFT |
| Switching Frequency-Max | 1200kHz |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum output current that TPS40091RHDTG4 can control in a synchronous buck stage?
TPS40091RHDTG4 supports a maximum output current of 120 A when configured with appropriate external power MOSFETs and inductors. This high current rating makes it suitable for FPGA core power, CPU Vcore, and server DDR memory power stages where dense, multi-phase step-down converters must deliver high current from a 12 V telecom or ATX supply rail.
Can TPS40091RHDTG4 operate in both voltage-mode and current-mode control, and when should each be used?
Yes, TPS40091RHDTG4 supports voltage-mode PWM as its primary control mode and can also operate with current-mode control for improved transient response and simplified loop compensation. Voltage-mode is preferred for multi-phase designs requiring precise duty-cycle symmetry, while current-mode is advantageous for single-phase converters needing fast load-step response at output voltages below 1.5 V.
For a 12 V server bus input, what output voltage range can TPS40091RHDTG4 regulate to with external components?
TPS40091RHDTG4 accepts input voltages from 4.5 V to 15 V with a 12 V nominal supply, and the output voltage is set by an external resistor divider feeding the feedback pin. This allows regulation to output voltages as low as the internal reference, typically around 0.6 V to 0.8 V, enabling generation of 1.0 V, 1.2 V, 1.5 V, 1.8 V, and 3.3 V rails required by modern FPGAs, CPUs, and DDR memory from a standard 12 V ATX or telecom bus.
What package does TPS40091RHDTG4 use and how does it benefit thermal performance in high-current designs?
TPS40091RHDTG4 is housed in a 28-pin QFN package with an exposed pad on the bottom, which provides a low thermal resistance path to the PCB copper ground plane. In high-current 120 A buck converter designs, this exposed-pad QFN construction allows heat generated by the controller and gate drivers to spread efficiently into the PCB, reducing junction temperature rise compared to equivalent SOIC or TSSOP outlines without an exposed pad.
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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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