Texas Instruments TPS5602IDBTR

Overview

TPS5602IDBTR from Texas Instruments is a dual-channel synchronous buck switch-mode power supply controller designed for high-transient DSP power applications. It features hysteretic control (8.5 mV typical hysteresis), 4.5–25 V input range, adjustable output down to 1.2 V per channel, and supports >95% efficiency via synchronous rectification. Used in 'C6000 and 'C54x DSP systems requiring independent sequencing and fast transient response.

For engineers reviewing the TPS5602IDBTR datasheet, TPS5602IDBTR pinout, TPS5602IDBTR application, or TPS5602IDBTR equivalent, key selection criteria include dual independent standby control (STBY1/STBY2), 1.185 V reference accuracy (±1.5%), 500 ns/350 ns propagation delay (INV→OUT_u), and 30-pin TSSOP package with validated gate drive capability (±1.2 A sink/source).

Technical Context

The TPS5602IDBTR implements independent hysteretic control per channel-each with dedicated INV1/INV2 inputs, COMP comparator, TRIP1/TRIP2 current limit sensing, and soft-start pins (SOFTSTART1/SOFTSTART2). Its architecture eliminates external compensation and enables sub-microsecond transient response without loop stability concerns.

It integrates dual 5-V regulators (Vref5 output), UVLO (3.8 V turn-on with 149 mV hysteresis), and active deadtime control (75 ns low-to-high, 164 ns high-to-low) to prevent shoot-through. The internal 15 µA current source enables precise current-limit setting via external resistors on TRIP1/TRIP2.

Key Specifications

Pinout & Package

TPS5602IDBTR is housed in a 30-pin TSSOP (DBT) package with exposed thermal pad. Pin functions are fully defined in the SLVS217 datasheet and validated for dual-channel synchronous buck topologies.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel synchronous buck controller applications.

Compared with TPS5602IDBTR, the TPS5602IDBTRG4 offers identical performance with RoHS compliance, while the TPS54290PWPR trades hysteretic speed and integration for PWM flexibility and lower cost in non-DSP applications - neither is pin-compatible, and both require PCB redesign.

Availability

TPS5602IDBTR is available at Aetrix Electronics and suitable for telecom DSP power supplies, industrial motor control FPGA cores, medical imaging signal processors, and automotive ADAS radar SoCs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS5602IDBTR 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 over 50 years of innovation in high-reliability power solutions.

The TPS5602 product line was engineered specifically for high-transient DSP power delivery, emphasizing independent dual-channel control, hysteretic regulation speed, and minimal external component count in compact TSSOP packaging.

FAQ

What is the function of the COMP pin on the TPS5602IDBTR?

The COMP pin on the TPS5602IDBTR serves as an internal comparator input for output voltage monitoring and under-voltage protection. It compares the feedback signal against the 1.185 V reference; if the sensed voltage falls below the threshold (e.g., 1.1 V min), the TPS5602IDBTR disables both output channels to protect downstream DSP logic. This function is independent of the main hysteretic regulation loop and provides fail-safe shutdown.

How does the TPS5602IDBTR achieve independent power sequencing between its two channels?

The TPS5602IDBTR achieves independent sequencing via dedicated STBY1 and STBY2 pins, each controlling one channel's operation. Pulling STBY1 low places Channel 1 in <1 µA standby mode while Channel 2 remains active - enabling precise up/down sequencing (e.g., core before I/O). The TPS5602IDBTR datasheet confirms this behavior is electrically isolated per channel with no shared internal state.

Can the TPS5602IDBTR operate with input voltages below 4.5 V?

No, the TPS5602IDBTR has a specified minimum input voltage of 4.5 V per the recommended operating conditions table in SLVS217. Below this, UVLO prevents startup (turn-on threshold is 3.6–4.2 V, but operation is not guaranteed). Attempting operation at 4.0 V may cause erratic regulation or failure to sustain switching - the TPS5602IDBTR is not characterized or warranted for sub-4.5 V use.

What is the purpose of the Vref5 pin on the TPS5602IDBTR?

The Vref5 pin on the TPS5602IDBTR delivers a regulated 5 V output (±6% tolerance, 10 mA capable) used to power the internal high- and low-side gate drivers and optionally external circuitry. When an external 5 V supply is applied to REG5V_IN, the TPS5602IDBTR disconnects Vref5 from the drivers and uses the external rail instead - improving efficiency by eliminating linear regulator dropout losses.

Does the TPS5602IDBTR support synchronous rectification, and how is it implemented?

Yes, the TPS5602IDBTR fully supports synchronous rectification via complementary high-side (OUT1_u/OUT2_u) and low-side (OUT1_d/OUT2_d) gate drive outputs per channel. Each pair drives external n-channel MOSFETs in a buck topology, eliminating body-diode conduction losses. The TPS5602IDBTR includes active deadtime control (75 ns/164 ns) to prevent shoot-through, and the drivers deliver ±1.2 A peak current to ensure fast MOSFET switching.