Texas Instruments TPS65001RUKT

Overview

TPS65001RUKT from Texas Instruments is a highly integrated power management IC (PMIC) for portable systems, combining a 600-mA step-down DC-DC converter, two 300-mA low-dropout regulators (LDO1 fixed at 1.8 V, LDO2 fixed at 2.8 V), and a supply voltage supervisor with manual reset input (MR), adjustable reset threshold (0.58–0.63 V), and capacitor-programmable reset timing. It operates from 2.3 V to 6 V input and targets space-constrained battery-powered applications such as smartphones and embedded processors.

For engineers reviewing the TPS65001RUKT datasheet, TPS65001RUKT pinout, TPS65001RUKT application, or TPS65001RUKT equivalent, key selection considerations include its 20-pin WQFN (3 mm × 3 mm) package, 2.25-MHz fixed-frequency PWM/SSC operation, dual independent LDO enables, open-drain PG and RST outputs, and integrated undervoltage lockout (1.72–1.82 V) with hysteresis.

Technical Context

The TPS65001RUKT implements a synchronous buck converter with internal high-side (240–480 mΩ) and low-side (185–380 mΩ) MOSFETs, supporting PFM/PWM auto-transition or forced-PWM mode via the MODE pin. Its oscillator integrates spread-spectrum clocking (SSC) to reduce EMI during PWM operation.

The device features separate analog (AGND) and power (PGND) grounds, dedicated feedback pins for each regulator (FB_DCDC, FB_LDO1, FB_LDO2), and a supply voltage supervisor that monitors RSTSNS voltage - enabling precise system-level reset control with external resistor divider and TRST timing capacitor.

Key Specifications

Pinout & Package

TPS65001RUKT uses a 20-pin WQFN package (3.00 mm × 3.00 mm, 0.5-mm pitch) with exposed thermal pad for enhanced thermal performance (R_θJB = 17.8 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power management applications.

Compared with TPS65001RUKT, TPS65000RTER removes SVS and reduces pin count but sacrifices reset control flexibility, while TPS650061RUKT upgrades DC-DC current at the cost of higher junction temperature under full load - both require revalidation of thermal design and reset circuitry.

Availability

TPS65001RUKT is available at Aetrix Electronics and suitable for smartphone power delivery, embedded processor core/I/O regulation, and point-of-load applications requiring stable component supply, long-term lifecycle support, and TI-qualified automotive-grade traceability.

Supply support for TPS65001RUKT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-efficiency DC-DC conversion and system-level power architecture.

The TPS6500x family was designed specifically for portable, battery-operated devices needing compact, multi-rail power solutions with integrated supervision - targeting smartphones, PDAs, and handheld computing platforms.

FAQ

What is the function of the MODE pin on the TPS65001RUKT?

The MODE pin on the TPS65001RUKT selects between automatic PFM/PWM operation (MODE = low) and forced-PWM mode (MODE = high). In automatic mode, the device transitions to PFM at light loads to minimize quiescent current (24–37 μA); forced-PWM ensures constant 2.25-MHz switching for predictable EMI and transient response. This pin directly controls the internal oscillator's modulation behavior and is essential for optimizing efficiency versus noise trade-offs in the final design.

Can the TPS65001RUKT LDO outputs be adjusted, or are they strictly fixed?

The TPS65001RUKT has fixed LDO outputs: VLDO1 is factory-set to 1.8 V and VLDO2 to 2.8 V - no external resistor network is required or supported for adjustment. Unlike the TPS65000 or TPS650001 variants, the TPS65001RUKT does not use FB_LDO1 or FB_LDO2 for regulation; those pins are internally connected. Attempting to reprogram them will not alter output voltage and may impair stability.

How does the supply voltage supervisor (SVS) in the TPS65001RUKT generate its reset signal?

The TPS65001RUKT SVS monitors the RSTSNS pin voltage, which is derived from the target supply rail via an external resistor divider. When RSTSNS falls below 0.58–0.63 V, the internal comparator triggers RST assertion. Reset duration is set by charging TRST with a 1.6–2.2-μA current source; the external capacitor value determines timeout. MR provides active-low manual override, and all three inputs (RSTSNS, MR, TRST) interact per the datasheet's reset state machine.

What thermal considerations apply to the TPS65001RUKT in a 20-pin WQFN package?

The TPS65001RUKT in the RUK package has R_θJA = 46.2 °C/W and R_θJB = 17.8 °C/W. To maintain junction temperature ≤125 °C at 85 °C ambient, total power dissipation must stay below ~821 mW (per dissipation ratings table). This requires adequate copper area under the exposed thermal pad, minimum 4 thermal vias to inner ground planes, and avoidance of nearby heat sources - especially critical when delivering 600 mA from the DC-DC stage at high input-output differentials.

Is the TPS65001RUKT pin-compatible with other devices in the TPS6500x family?

No, the TPS65001RUKT is not pin-compatible with the 16-pin TPS65000RTER or TPS650001RTER due to its 20-pin WQFN footprint and additional SVS-related pins (MR, TRST, RST, RSTSNS). However, it shares pin functions and placement for common signals (e.g., EN_DCDC, PG, SW, VINLDO1/2) with other 20-pin variants like TPS650061RUKT - allowing layout reuse where SVS and DC-DC current requirements align.