Texas Instruments TPS563211DRLR

Overview

TPS563211DRLR from Texas Instruments is a 3-A synchronous buck DC/DC converter operating from 4.2 V to 18 V input, delivering 0.6 V to 7 V output with ±1% reference voltage accuracy, 600 kHz fixed switching frequency (±8.5%), and integrated 66-mΩ/33-mΩ MOSFETs. It serves as a primary power stage in compact consumer and networking power supplies.

For engineers reviewing the TPS563211DRLR datasheet, TPS563211DRLR pinout, TPS563211DRLR application, or TPS563211DRLR equivalent, key selection criteria include Eco-mode/FCCM configurability, internal compensation, SOT583 package footprint, and cycle-by-cycle high-side/low-side current limiting for robust overload handling.

Technical Context

The TPS563211DRLR employs Advanced Emulated Current Mode (AECM) control-combining peak current mode stability with D-CAP2-like transient response-to maintain true fixed 600 kHz switching across load and line variations while enabling fast regulation without external compensation. Its on-time extension supports up to 98% duty cycle for high VIN-to-VOUT ratios.

Operation mode (Eco-mode vs FCCM) and PG/SS pin function are jointly configured via a single MODE pin resistor, enabling flexible power sequencing and soft-start control. Protection includes non-latched OVP/UVP/UVLO/TSD, hiccup-mode recovery, and independent high-side peak and low-side valley current limits (5 A / 4 A typical).

Key Specifications

Pinout & Package

The TPS563211DRLR is housed in an 8-pin SOT583 package with exposed thermal pad (1.6 mm × 2.1 mm body size), optimized for thermal performance in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with TPS563211DRLR, TPS563210DRLR trades 0.5 A output capacity for lower unit cost, while MP2332HGTL-Z offers broader input voltage support at the expense of configurable light-load behavior and integrated sequencing features.

Availability

TPS563211DRLR is available at Aetrix Electronics and suitable for set-top box, smart speaker, and wired networking applications requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade reliability screening.

Supply support for TPS563211DRLR 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 conversion.

The TPS563211DRLR belongs to TI's Nano-SIMPLE Switcher® family-designed specifically for space-constrained, high-efficiency DC/DC applications in consumer, networking, and surveillance equipment where minimal external components and fast time-to-market are critical.

FAQ

What is the minimum input voltage required for TPS563211DRLR to initiate power-good assertion?

The TPS563211DRLR requires VIN ≥ 2.5 V to assert the PG/SS pin in Power-Good mode. Below this threshold, the PG function is undefined per datasheet Section 6.5. This ensures reliable startup sequencing even during brown-out conditions, and the 2.5-V minimum aligns with the device's internal bias generation requirements before regulation begins. The TPS563211DRLR will not drive PG high until VIN exceeds both the UVLO rising threshold (4.0 V typical) and the 2.5-V PG enable condition.

Can TPS563211DRLR operate with a 12-V input and 1.05-V output at full 3-A load?

Yes, the TPS563211DRLR supports 12-V-to-1.05-V conversion at 3-A continuous output. Its 45-ns minimum on-time and 98% maximum duty cycle enable this high step-down ratio without pulse-skipping instability. Efficiency reaches ~88% at 12 V input and 1.05 V output per Figure 6-13, and thermal performance remains within spec when using the SOT583 thermal pad with adequate copper area. The TPS563211DRLR's AECM control ensures stable regulation under these conditions.

How does the MODE pin resistor value affect TPS563211DRLR functionality?

The MODE pin resistor selects both light-load operation mode (Eco-mode or FCCM) and PG/SS pin function (Power-Good or Soft-Start) per Table 7-1. For example, a 0-Ω resistor configures Eco-mode with PG output, while a 100-kΩ resistor enables FCCM with external soft-start. The TPS563211DRLR latches this configuration within 110 µs after VIN crosses UVLO, making it immune to noise during steady-state operation. No reconfiguration occurs unless EN or VIN toggles.

Does TPS563211DRLR support pre-biased output capacitors during startup?

Yes, the TPS563211DRLR implements pre-biased soft-start: when the output capacitor is pre-charged, the device delays switching until the internal reference voltage exceeds the feedback voltage (VFB). This prevents reverse inductor current and output voltage overshoot. The TPS563211DRLR achieves smooth ramp-up into regulation without external circuitry, and this behavior is active regardless of whether PG or SS function is selected on Pin 1.

What thermal derating applies to TPS563211DRLR in a standard 2-layer PCB layout?

On a standard 2-layer JEDEC board, the TPS563211DRLR has RθJA = 116.7°C/W. At 3-A load with 12-V input and 5-V output, power dissipation is ~0.6 W, resulting in ~70°C junction rise above ambient. Derating begins above 85°C ambient; full 3-A output is maintained up to 70°C ambient with 1-in² 2-oz copper pour under the thermal pad. The TPS563211DRLR enters thermal shutdown at 150°C with 20°C hysteresis, ensuring safe recovery.