Specifications
| Type | Description |
|---|---|
| Part Number | TPS65279 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package Case | 32-pin thermally enhanced HTSSOP (DAP), 6.20 mm x 11.00 mm; 36-pin VQFN (RHH), 6.00 mm x 6.00 mm |
| Input Voltage Range | 4.5 to 18 V |
| Maximum Continuous Output Current Buck 1 | 5 A |
| Maximum Continuous Output Current Buck 2 | 5 A |
| Paralleled Output Current | up to 10 A |
| Switching Frequency Range | 200 kHz to 1.6 MHz |
| Control Mode | Peak current-mode control |
| Light Load Mode | Pulse skipping mode |
| Phase Operation | 180 degrees out-of-phase |
| Absolute Maximum VIN/PVIN Voltage | -0.3 to 20 V |
| Absolute Maximum LX Voltage | -4.5 to 23 V |
| Absolute Maximum BST-to-LX Voltage | -0.3 to 7 V |
| Absolute Maximum Logic Pin Voltage | -0.3 to 7 V |
| Absolute Maximum Analog Pin Voltage | -0.3 to 3.6 V |
| Absolute Maximum Ground Pin Voltage | -0.3 to 0.3 V |
| Operating Virtual Junction Temperature | -40 to 150 °C |
| Storage Temperature | -55 to 150 °C |
| ESD Rating HBM | 2000 V |
| ESD Rating CDM | 1000 V |
| Recommended Supply Input Voltage | 4.5 to 18 V |
| Recommended Load Current | 0 to 5 A |
| Recommended Output Voltage | 0.6 to 9 V |
| Recommended Enable Voltage | 0 to 6 V |
| Recommended Operating Junction Temperature | -40 to 125 °C |
| Junction-to-Ambient Thermal Resistance, DAP HTSSOP | 35 °C/W |
| Junction-to-Ambient Thermal Resistance, RHH VQFN | 30.8 °C/W |
| Junction-to-Case Top Thermal Resistance, DAP HTSSOP | 17.7 °C/W |
| Junction-to-Case Top Thermal Resistance, RHH VQFN | 18.8 °C/W |
| Junction-to-Board Thermal Resistance, DAP HTSSOP | 19 °C/W |
| Junction-to-Board Thermal Resistance, RHH VQFN | 6 °C/W |
| Junction-to-Top Characterization Parameter, DAP HTSSOP | 0.5 °C/W |
| Junction-to-Top Characterization Parameter, RHH VQFN | 0.2 °C/W |
| Junction-to-Board Characterization Parameter, DAP HTSSOP | 18.9 °C/W |
| Junction-to-Board Characterization Parameter, RHH VQFN | 6 °C/W |
| Junction-to-Case Bottom Thermal Resistance, DAP HTSSOP | 1.3 °C/W |
| Junction-to-Case Bottom Thermal Resistance, RHH VQFN | 0.7 °C/W |
| Electrical Characteristics Input Voltage Range | 4.5 to 18 V |
| Shutdown Supply Current | 10 µA |
| Switching Quiescent Current, No Load, Not Switching | 1.2 mA |
| Switching Quiescent Current, No Load, Buck Switching | 10 mA |
| VIN Undervoltage Lockout Rising | 4.25 V min, 4.50 V typ |
| VIN Undervoltage Lockout Falling | 3.4 V min, 3.75 V typ |
| VIN Undervoltage Lockout Hysteresis | 0.5 V typ |
| V7V LDO Output Voltage | 6.10 V min, 6.3 V typ, 6.5 V max |
| V7V LDO Current Limit | 200 mA typ |
| Enable Threshold Rising | 1.21 V typ, 1.3 V max |
| Enable Threshold Falling | 1.0 V min, 1.17 V typ |
| Enable Input Current | 3 µA typ |
| Enable Hysteresis Current | 3 µA typ |
| Feedback Reference Voltage | 0.6 V ±1% |
| V7V Regulator Typical Output | 6.3 V |
| V7V Bypass Capacitor | minimum 1 µF ceramic capacitor |
| Power Good Pullup Resistor | 100 kΩ recommended |
| Datasheet Status | request_only |
Product Overview
The TPS65279 is a Texas Instruments dual synchronous step-down converter for Power_Management designs requiring two regulated buck outputs from a 4.5 to 18 V input supply. Each buck output supports up to 5 A continuous load current, with a recommended load current range of 0 to 5 A for IOUT1 and IOUT2 and a recommended output voltage range of 0.6 to 9 V.
The converter uses constant-frequency peak current-mode control. Switching frequency is set by an external resistor on ROSC across a 200 kHz to 1.6 MHz range. The MODE pin controls pulse skipping mode for light-load operation, and the two buck channels operate 180 degrees out of phase to reduce input capacitance requirements and power-supply-induced noise.
Package options include a 32-pin thermally enhanced HTSSOP (DAP), 6.20 mm x 11.00 mm, and a 36-pin VQFN (RHH), 6.00 mm x 6.00 mm. The device includes a 6.3 V typical internal V7V LDO, requires at least a 1 µF ceramic bypass capacitor on V7V, and uses open-drain PGOOD outputs with a recommended 100 kΩ pullup resistor.
Key Features
- 4.5 to 18 V operating input voltage range
- Two buck outputs rated for 5 A each
- Up to 10 A using paralleled current sharing mode
- 200 kHz to 1.6 MHz resistor-set switching frequency
- Constant-frequency peak current-mode control architecture
- Pulse skipping mode controlled by MODE pin
- 180-degree out-of-phase operation reduces input capacitance
- 0.6 V ±1% feedback reference voltage
- 6.3 V typical internal V7V LDO output
- Open-drain PGOOD outputs with 100 kΩ recommended pullups
Typical Applications
- Dual 5 A buck rails
- Single paralleled 10 A rail
- 4.5 to 18 V input power systems
- 0.6 to 9 V output regulation
- Current-mode step-down conversion
- Out-of-phase dual-rail converters
- Pulse-skipping light-load operation
Procurement Notes
When requesting a quote for TPS65279, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What input voltage range does the TPS65279 support?
The TPS65279 supports a 4.5 to 18 V operating input voltage range. The same 4.5 to 18 V range is also listed under recommended supply input voltage and electrical characteristics for VIN1 and VIN2.
How much output current can each TPS65279 buck provide?
Buck 1 and Buck 2 are each specified for a maximum continuous output current of 5 A. The recommended load current range for IOUT1 and IOUT2 is 0 to 5 A.
Can the two TPS65279 buck outputs be paralleled?
Yes. Buck 1 and Buck 2 can be paralleled using current sharing mode when ISHARE is high, supporting up to 10 A paralleled output current according to the extracted datasheet facts.
What packages are listed for the TPS65279?
The listed package options are a 32-pin thermally enhanced HTSSOP (DAP), 6.20 mm x 11.00 mm, and a 36-pin VQFN (RHH), 6.00 mm x 6.00 mm.
How is the TPS65279 switching frequency configured?
The switching frequency range is 200 kHz to 1.6 MHz. It is set by an external resistor connected to the ROSC pin, based on the extracted datasheet information.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 25, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.