Specifications
| Type | Description |
|---|---|
| Part Number | TPS65266 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | VQFN (RHB), 32 pins, 5.00 mm x 5.00 mm nominal body |
| Input Voltage Range | 2.7 to 6.5 V; recommended operating condition |
| Maximum Continuous Output Current | 3 A / 2 A / 2 A; buck1 / buck2 / buck3 |
| Feedback Reference Voltage | 0.6 V ±1%; feature summary |
| Feedback Voltage | min 0.594 V, typ 0.6 V, max 0.606 V; VCOMP = 1.2 V, TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Adjustable Clock Frequency | 250 kHz to 2.4 MHz; ROSC programmable oscillator |
| VIN Undervoltage Lockout Rising Threshold | min 2.35 V, typ 2.45 V, max 2.6 V; VIN rising, TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| VIN Undervoltage Lockout Falling Threshold | min 2.15 V, typ 2.25 V, max 2.35 V; VIN falling, TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| VIN Undervoltage Lockout Hysteresis | typ 200 mV; TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Shutdown Supply Current | typ 9 µA; EN1 = EN2 = EN3 = 0 V |
| Input Quiescent Current Without Switching | typ 790 µA; EN1 = EN2 = EN3 = 5 V, FB1 = FB2 = FB3 = 0.8 V |
| Buck1 Input Quiescent Current Without Switching | typ 340 µA; EN1 = 5 V, EN2 = EN3 = 0 V, FB1 = 0.8 V |
| Buck2 Input Quiescent Current Without Switching | typ 340 µA; EN2 = 5 V, EN1 = EN3 = 0 V, FB2 = 0.8 V |
| Buck3 Input Quiescent Current Without Switching | typ 340 µA; EN3 = 5 V, EN1 = EN2 = 0 V, FB3 = 0.8 V |
| EN High-Level Input Voltage | min 1.2 V, typ 1.26 V; EN1/EN2/EN3, TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| EN Low-Level Input Voltage | typ 1.1 V, max 1.15 V; EN1/EN2/EN3, TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| EN Pullup Current | min 1.8 µA, typ 2.1 µA, max 2.4 µA; ENx = 1 V |
| EN Pullup Current | typ 5.3 µA; ENx = 1.3 V |
| EN Hysteresis Current | typ 3.2 µA; TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Soft-Start Charging Current | min 4.5 µA, typ 5.5 µA, max 6.5 µA; SS1/SS2/SS3 pins |
| Minimum On-Time | typ 80 ns, max 100 ns; TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Error Amplifier Transconductance | typ 290 µS; -2 µA < ICOMPX < 2 µA |
| COMP Voltage to Inductor Current Transconductance | typ 10 A/V; ILX = 0.5 A |
| Buck1 Peak Inductor Current Limit | min 3.9 A, typ 4.6 A, max 5.3 A; TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Buck1 Low-Side Sink Current Limit | typ 1.4 A; TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Buck2/3 Peak Inductor Current Limit | min 2.5 A, typ 3.1 A, max 3.7 A; TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Buck2/3 Low-Side Sink Current Limit | typ 1.2 A; TA = 25°C, VIN = 5 V, FSW = 1 MHz |
| Buck1 High-Side Switch Resistance | typ 45 mΩ; VINQ = 5 V |
| Buck1 Low-Side Switch Resistance | typ 50 mΩ; VINQ = 5 V |
| Buck2 High-Side Switch Resistance | typ 60 mΩ; VINQ = 5 V |
| Buck2 Low-Side Switch Resistance | typ 60 mΩ; VINQ = 5 V |
| Buck3 High-Side Switch Resistance | typ 60 mΩ; VINQ = 5 V |
| Buck3 Low-Side Switch Resistance | typ 60 mΩ; VINQ = 5 V |
| Overcurrent Wait Time | 512 cycles; hiccup timing |
| Hiccup Time Before Restart | 16382 cycles; hiccup timing |
| PGOOD Feedback Undervoltage Falling Threshold | 92.5% VREF; FBx undervoltage falling |
| PGOOD Feedback Undervoltage Rising Threshold | 95% VREF; FBx undervoltage rising |
| Absolute Maximum VIN Voltage | -0.3 to 7 V; VIN1, VIN2, VIN3, VINQ |
| Absolute Maximum LX Voltage | -1.0 to 7 V; LX1, LX2, LX3; maximum withstand voltage transient <20 ns |
| Absolute Maximum BST-to-LX Voltage | -0.3 to 7 V; BST1/BST2/BST3 referenced to LX1/LX2/LX3 respectively |
| Absolute Maximum EN and PGOOD Voltage | -0.3 to 7 V; EN1, EN2, EN3, PGOOD pins |
| Absolute Maximum Analog Pin Voltage | -0.3 to 3.6 V; FB1/2/3, COMP1/2/3, SS1/2/3, ROSC pins |
| Operating Junction Temperature | -40 to 125°C; recommended operating condition |
| Absolute Maximum Operating Junction Temperature | -40 to 150°C; absolute maximum rating |
| Storage Temperature | -55 to 150°C; absolute maximum rating |
| HBM ESD Rating | ±2000 V; ANSI/ESDA/JEDEC JS-001, all pins |
| CDM ESD Rating | ±500 V; JEDEC JESD22-C101, all pins |
| Junction-to-Ambient Thermal Resistance | 34.2°C/W; RHB 32-pin package |
| Junction-to-Case Top Thermal Resistance | 27.5°C/W; RHB 32-pin package |
| Junction-to-Board Thermal Resistance | 8.3°C/W; RHB 32-pin package |
| Junction-to-Top Characterization Parameter | 0.4°C/W; RHB 32-pin package |
| Junction-to-Board Characterization Parameter | 8.3°C/W; RHB 32-pin package |
| Junction-to-Case Bottom Thermal Resistance | 2.8°C/W; RHB 32-pin package |
| Bootstrap Capacitor Recommendation | 47 nF; connect from BSTx pin to LXx pin |
| VINQ Bypass Capacitor Recommendation | 1 µF; connect from VINQ to analog ground near pin |
| VIN Input Ceramic Capacitor Recommendation | 10 µF; suggested for VIN1, VIN2, VIN3 input pins |
| Datasheet Status | request_only |
Product Overview
The TPS65266 is a Texas Instruments triple synchronous step-down converter for Power_Management designs. It operates from a recommended 2.7 to 6.5 V input range and integrates three buck channels rated for 3 A / 2 A / 2 A maximum continuous output current on buck1 / buck2 / buck3. Output regulation is based on a 0.6 V ±1% feedback reference, with feedback voltage specified from 0.594 V to 0.606 V under the listed 25°C, VIN = 5 V, 1 MHz test condition.
Clocking is adjustable from 250 kHz to 2.4 MHz through the ROSC-programmable oscillator. The device includes VIN undervoltage lockout thresholds, enable-pin thresholds and pullup currents, soft-start charging current on SS1/SS2/SS3, peak and low-side current limits for the buck channels, PGOOD feedback thresholds, and overcurrent hiccup timing.
The package is a 32-pin VQFN (RHB) with a 5.00 mm x 5.00 mm nominal body. Assembly-related external component facts include 47 nF bootstrap capacitors from BSTx to LXx, a 1 µF VINQ bypass capacitor near the pin, and suggested 10 µF ceramic input capacitors for VIN1, VIN2, and VIN3.
Key Features
- Triple synchronous step-down converter architecture
- 2.7 to 6.5 V recommended input range
- 3 A / 2 A / 2 A buck output currents
- 0.6 V ±1% feedback reference voltage
- 250 kHz to 2.4 MHz adjustable clock frequency
- VIN undervoltage lockout with 200 mV typical hysteresis
- Independent EN thresholds for EN1, EN2, and EN3
- Soft-start charging current specified on SS1/SS2/SS3 pins
- Hiccup protection timing with 512-cycle overcurrent wait
- 32-pin 5.00 mm x 5.00 mm VQFN package
Typical Applications
- Triple-output buck regulator designs
- Low-voltage input power rails
- Multi-rail Power_Management systems
- 2.7 to 6.5 V input supplies
- Designs requiring PGOOD monitoring
- Synchronous step-down converter stages
- Compact 32-pin VQFN assemblies
Procurement Notes
When requesting a quote for TPS65266, 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 type of converter is the TPS65266?
The TPS65266 is a Texas Instruments triple synchronous step-down converter. It is categorized as a Power_Management Power_IC and provides three buck outputs with maximum continuous currents of 3 A, 2 A, and 2 A.
What input voltage range does TPS65266 support?
The recommended operating input voltage range for TPS65266 is 2.7 to 6.5 V. Absolute maximum voltage on VIN1, VIN2, VIN3, and VINQ is specified from -0.3 to 7 V.
What package is used for the TPS65266?
TPS65266 is supplied in a VQFN RHB package with 32 pins and a 5.00 mm x 5.00 mm nominal body. The listed thermal data includes 34.2°C/W junction-to-ambient resistance for this package.
What clock frequency range is available on TPS65266?
TPS65266 has an adjustable clock frequency from 250 kHz to 2.4 MHz using the ROSC programmable oscillator. The datasheet facts also list several electrical characteristics under VIN = 5 V and FSW = 1 MHz conditions.
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.