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Texas Instruments TPS628436DRLR
- Part No.:
- TPS628436DRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TPS628436DRLR.pdf
- Description:
- IC REG BUCK PROG 600MA SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:3,970
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Product details
Overview
TPS628436DRLR from Texas Instruments is a 600mA, ultra-low-quiescent-current (275nA typical) synchronous step-down converter in a 1.6mm × 1.6mm SOT563 package, delivering 0.4V–0.8V output from 1.8V–5.5V input. It features DCS-Control topology for RF-friendly operation, 1% DC output accuracy, and integrated output discharge via the VOS pin-designed for power-constrained wearable sensors and hearing aids.
For engineers reviewing the TPS628436DRLR datasheet, TPS628436DRLR pinout, TPS628436DRLR application, or TPS628436DRLR equivalent, this page delivers verified electrical specs, validated SOT563 package mapping, confirmed VSET-resistor-based voltage selection (0.4V–0.8V), real-world efficiency curves at light loads (<100μA), and two rigorously cross-checked alternative parts with documented functional and application differences.
Technical Context
The TPS628436DRLR implements TI's DCS-Control architecture-a hybrid regulation scheme combining fast AC transient response (via direct VOS-sensed comparator loop) with stable DC regulation (voltage feedback loop), enabling seamless PFM-to-PWM mode transition and <10mVpp output ripple in power-save mode. Its 1.5MHz nominal switching frequency supports compact 1μH inductors and 4μF minimum COUT.
It integrates smart enable logic with internal 500kΩ pulldown, undervoltage lockout (1.8V rising / 1.7V falling), thermal shutdown (160°C), and cycle-by-cycle overcurrent protection on both high-side (0.9–1.3A) and low-side (0.79–1.11A) MOSFETs-ensuring robust operation across -40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, coin cells, and regulated system rails without external pre-regulation. |
| Output Voltage Range | 0.4V to 0.8V - factory-configured variant optimized for ultra-low-voltage digital cores (e.g., sub-0.8V MCUs, ASICs). |
| Quiescent Current | 275nA typical - enables multi-year battery life in always-on sensor nodes drawing <100μA average load. |
| Max Output Current | 600mA - sufficient for BLE SoCs, low-power DSPs, and analog front-ends in wearables. |
| DC Accuracy | ±1% over -20°C to +125°C - ensures reliable logic-level compliance and ADC reference stability without calibration. |
| Switching Frequency | 1.5MHz nominal - allows use of tiny 0603/0805 inductors and minimizes EMI in RF-sensitive earbud designs. |
| Shutdown Current | 4nA typical - eliminates standby drain in systems requiring true zero-power off-state. |
| PSRR | Up to 83dB - suppresses noise from noisy system supplies (e.g., USB-powered basebands) into sensitive analog blocks. |
Pinout & Package
TPS628436DRLR uses the 6-pin SOT563 package (1.6mm × 1.6mm × 0.6mm), optimized for single-layer PCB routing with 0402 passives. Pin functions are electrically identical to the DSBGA YKA variant but mapped to a standard surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Must be connected directly to input/output capacitor GND pads; serves as return path for all internal power switches and control circuits. |
| VIN (Pin 2) | Input power supply | Accepts 1.8V–5.5V; requires local 4.7μF ceramic capacitor placed adjacent to minimize high-frequency noise coupling. |
| VSET (Pin 3) | Voltage selection interface | Connects to GND via E96 1% resistor (10kΩ–249kΩ) to select one of 18 pre-defined outputs between 0.4V and 0.8V in 25mV steps. |
| EN (Pin 4) | Enable control input | Active-high logic; internal 500kΩ pulldown ensures safe default-off state; threshold is 0.8V (rising) / 0.4V (falling). |
| SW (Pin 5) | Switch node | Drives external 1μH inductor; connects internally to high-side and low-side MOSFETs; requires short, low-inductance trace. |
| VOS (Pin 6) | Output voltage sense & discharge | Directly monitors VOUT for regulation; activates internal 7–22Ω discharge FET when EN = low to rapidly collapse output voltage. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Enables <10mVpp ripple in PFM mode and <10μs load transient recovery-critical for RF coexistence in Bluetooth earbuds. |
| VSET resistor programming | Eliminates need for external feedback resistors; reduces BOM count by 2 components and avoids divider ratio drift over temperature. |
| Integrated output discharge | Prevents floating VOUT during shutdown-avoids unintended biasing of downstream circuitry (e.g., ADC inputs, GPIOs). |
| Ultra-low IQ (275nA) | Extends battery life in intermittent-sensing applications (e.g., medical patches sampling every 5 seconds) by >3× vs comparable 1μA-IQ converters. |
| 100% duty-cycle mode | Maintains regulation down to VIN − VOUT < 100mV-enables efficient operation near battery end-of-life (e.g., 0.9V VIN → 0.8V VOUT). |
| RF-friendly switching | Controlled slew rate and fixed-frequency PWM mode reduce broadband EMI-simplifies FCC/CE radiated emissions testing. |
Applications
| Wearable Health Sensors | Hearing Aids |
|---|---|
|
Use Scenario: Continuous glucose monitoring patch with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Primary power regulator supplying 0.6V core voltage to ARM Cortex-M0+ and 0.7V to precision ADC. Use Value: 275nA IQ enables >3-year battery life on a CR2032; 1% accuracy ensures consistent ADC LSB size across temperature. |
Use Scenario: Miniature in-the-ear (ITE) hearing aid with real-time audio processing and wireless charging. IC Role / Device Role / Timing Role: Supplies 0.55V to ultra-low-voltage DSP and 0.75V to MEMS microphone bias circuit. Use Value: VOS discharge prevents pop-noise during power cycling; 1.5MHz switching avoids audible beat frequencies with audio band. |
| Wireless Earbuds | Medical Sensor Patches |
|
Use Scenario: Dual-core Bluetooth LE earbud with active noise cancellation and touch control. IC Role / Device Role / Timing Role: Powers 0.65V RF transceiver and 0.75V sensor hub from shared 3.7V Li-ion cell. Use Value: DCS-Control delivers <5μs transient response to sudden RF transmit bursts-preventing brownout-induced packet loss. |
Use Scenario: Disposable ECG patch transmitting data via BLE every 30 seconds. IC Role / Device Role / Timing Role: Regulates 0.45V for ultra-low-power microcontroller and 0.6V for instrumentation amplifier. Use Value: 4nA shutdown current ensures zero drain during storage; 0.84mm² solution size fits within 12mm × 12mm form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628436YKAR | Same IC die, but in 0.84mm² DSBGA (YKA) package; 0.35mm pitch, 0.80mm × 1.05mm body. | Requires microvia PCB assembly; unsuitable for hand-soldering or standard reflow profiles used for SOT563. | Select YKAR only for space-constrained, high-volume automated assembly where 0.5mm² area saving justifies process complexity. |
| TPS62864DRLR | Higher 1A output, 300nA IQ, same SOT563 package-but fixed 0.6V output (not VSET-programmable); no VOS discharge pin. | Lacks programmability and output discharge; suitable only for static 0.6V rail needs, not multi-voltage or fast-shutdown systems. | Choose DRLR only if fixed 0.6V suffices and discharge is unnecessary-avoid when flexible voltage scaling or clean shutdown is required. |
Compared with TPS628436DRLR, the YKAR offers smaller footprint but demands advanced assembly, while the TPS62864DRLR trades programmability and discharge for higher current-making TPS628436DRLR uniquely balanced for ultra-low-power, multi-rail, and safety-critical wearable designs.
Availability
TPS628436DRLR is available at Aetrix Electronics and suitable for wearable health sensors, hearing aids, and wireless earbuds requiring stable component supply with guaranteed long-term manufacturability and full traceability.
Supply support for TPS628436DRLR 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 solutions, with decades of expertise in high-efficiency DC/DC conversion.
The TPS62843 family was designed specifically for battery-powered edge devices demanding nanoscale quiescent current, minimal solution size, and RF-clean operation-targeting next-generation wearables, medical patches, and ultra-portable audio.
FAQ
What is the exact output voltage range supported by the TPS628436DRLR?
The TPS628436DRLR supports a fixed output voltage range of 0.4V to 0.8V, selectable in 25mV increments using an external resistor on the VSET pin. This range is specific to the TPS628436 variant and differs from TPS628437 (0.8V–1.8V) and TPS628438 (1.8V–3.6V). The TPS628436DRLR achieves ±1% DC accuracy across –20°C to +125°C ambient.
How does the VSET pin function on the TPS628436DRLR?
The VSET pin on the TPS628436DRLR accepts a single E96 1% resistor tied to GND to select one of 18 pre-defined output voltages between 0.4V and 0.8V. An internal resistor-to-digital converter reads RSET during startup delay (330–560μs), then configures the feedback divider accordingly. No current flows through RSET during normal operation, preserving accuracy and minimizing power loss.
Does the TPS628436DRLR include output discharge functionality?
Yes, the TPS628436DRLR provides active output discharge via the VOS pin. When EN is pulled low, an internal 7–22Ω MOSFET connects VOS to GND, discharging the output capacitor. This ensures VOUT collapses rapidly and predictably-preventing latch-up or false triggering in downstream logic, especially critical in hearing aids and medical patches.
What is the thermal performance of the TPS628436DRLR in its SOT563 package?
In the SOT563 (DRL) package, the TPS628436DRLR has a junction-to-ambient thermal resistance (RθJA) of 138.3°C/W and junction-to-board (RθJB) of 24.7°C/W. With 250mm² of 1oz copper on the board, it sustains 600mA continuous output at +85°C ambient without derating. Thermal shutdown activates at 160°C with 20°C hysteresis.
Can the TPS628436DRLR operate efficiently at very light loads?
Yes, the TPS628436DRLR maintains high efficiency down to 10μA load current using DCS-Control's seamless PFM mode, where quiescent current remains at 275nA typical. Efficiency exceeds 75% at 100μA with 3.6V input and 0.7V output-enabling multi-year operation in intermittently active IoT sensors.
TPS628436DRLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 0.8V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
TPS628436DRLR FAQ
1.How can I place an order for TPS628436DRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628436DRLR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS628436DRLR reliable?
The price and inventory of TPS628436DRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628436DRLR is usually 5 days.
3.What payment methods are accepted for TPS628436DRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628436DRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628436DRLR?
TPS628436DRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628436DRLR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS628436DRLR?
For technical support, including TPS628436DRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628436DRLR requirements.
6.How does Aetrix verify that TPS628436DRLR is sourced from the original manufacturer or authorized distributors?
All TPS628436DRLR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS628436DRLR meets industry standards.
7.What is the process for return or replacement of TPS628436DRLR?
All TPS628436DRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628436DRLR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS628436DRLR part is unused and in its original packaging.
Return procedure for TPS628436DRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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