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Texas Instruments TPS61299DRLR
- Part No.:
- TPS61299DRLR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TPS61299DRLR.pdf
- Description:
- IC REG BOOST ADJ SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:1,932
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Product details
Overview
TPS61299DRLR from Texas Instruments is a synchronous boost converter IC optimized for ultra-low-power battery-powered systems, featuring 95nA typical quiescent current into VOUT, 1.2A average input current limit, and operation down to 0.5V input voltage. It delivers regulated output voltages from 1.8V to 5.5V in a 6-pin SOT563 package and supports fast transient response (~8μs) for optical modules and wearable power rails.
For engineers reviewing the TPS61299DRLR datasheet, TPS61299DRLR pinout, TPS61299DRLR application, or TPS61299DRLR equivalent, key selection criteria include its true shutdown behavior (EN low), 0.7V start-up voltage, WCSP/SOT563 package compatibility, and precise VSEL-based output voltage programming - all critical for coin-cell and alkaline-battery designs requiring long runtime and load-step stability.
Technical Context
The TPS61299DRLR employs a hysteretic current-mode control architecture with constant 350mA inductor ripple current, enabling variable switching frequency (≈3MHz at VIN=3.6V, VOUT=5V, L=1μH) and automatic PFM/PWM transition. Its UVLO threshold is 0.7V (rising), and it supports auto pass-through when VIN > VOUT.
This device integrates high- and low-side synchronous MOSFETs (RDS(on) = 150mΩ HS / 88mΩ LS at VOUT=5V), output short-circuit protection, and thermal shutdown (150°C). The EN pin controls true disconnection (not force pass-through), distinguishing it from TPS61299A variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current (VOUT) | 95nA typical - enables multi-year runtime on coin cells under light-load standby |
| Input Voltage Range | 0.5V–5.5V - supports deep discharge of alkaline/coin cells and Li-ion backup |
| Output Voltage Range | 1.8V–5.5V - programmable via VSEL resistor; covers MCU I/O, sensors, and RF bias rails |
| Avg Input Current Limit | 1.2A - protects battery from excessive draw while supporting up to 500mA output at 3V→5V |
| Start-up Voltage | 0.7V (rising) - ensures reliable cold-start from weak or partially depleted batteries |
| Efficiency | 94% at VIN=3.6V, VOUT=5V, IOUT=200mA - minimizes thermal rise and extends battery life |
| Transient Response | ~8μs settling time (0A→200mA) - maintains stable rail during burst-mode sensor or radio activity |
Pinout & Package
TPS61299DRLR uses a 6-pin SOT563 package (1.6mm × 1.6mm), optimized for space-constrained wearables and optical modules. Pin functions are validated per TI SLVSGS9G Rev. October 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 0.5V–5.5V source; UVLO activates at 0.7V rising; powers internal circuitry and switch |
| SW | Switch node | Connects to external inductor; carries pulsed current between internal HS/LP MOSFETs |
| EN | Enable control | Logic input (VEN_H = 0.84V min); EN low forces true shutdown - full input-output isolation |
| VSEL | Voltage select | Resistor-to-GND sets one of 21 output voltages (e.g., 3.3V, 5.0V); latched at startup only |
| VOUT | Regulated output | Delivers stable boosted voltage; includes SCP and thermal shutdown protection |
| GND | Ground reference | Common return for VIN, VOUT, and internal control circuits; critical for EMI and regulation accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic current-mode control | Enables fixed 350mA inductor ripple and automatic PFM/PWM mode transition without external compensation |
| True shutdown (EN low) | Disables switching and fully turns off high-side MOSFET - <60nA VIN shutdown current, zero output leakage |
| VSEL-programmable output | 21 factory-trimmed output options (1.8V–5.5V) set by single external resistor; no firmware or EEPROM required |
| Fast transient mode | Reduces output voltage settling time to ~8μs (0A→200mA), critical for optical module burst loads |
| Battery-friendly UVLO | 0.7V start-up threshold + 0.5V operating minimum - extracts maximum energy from aging alkaline/coin cells |
Applications
| Smart Wearables | Portable Medical Sensors |
|---|---|
|
Use Scenario: Powering OLED display and BLE SoC in smart bands with CR2032 coin cell. IC Role / Device Role / Timing Role: Primary boost regulator providing stable 3.3V rail from 2.0–3.0V battery; manages deep-discharge transitions. Use Value: 95nA quiescent current extends shelf life and operational runtime beyond 12 months on single coin cell. |
Use Scenario: Supplying 5.0V to optical pulse oximeter LED driver and analog front-end. IC Role / Device Role / Timing Role: High-transient-response boost stage delivering clean 5V during 200mA LED pulses. Use Value: ~8μs load-step settling prevents LED intensity droop and preserves SpO₂ measurement accuracy. |
| TWS Earbud Charging Case | Optical Transceiver Modules |
|
Use Scenario: Boosting 3.7V Li-ion to 5.0V for USB-C PD negotiation and charging circuitry in compact case. IC Role / Device Role / Timing Role: Efficient mid-power boost converter with 1.2A input current limit and thermal foldback. Use Value: 94% efficiency at 200mA reduces heat buildup in sealed plastic enclosure and improves charge cycle count. |
Use Scenario: Generating stable 3.3V supply for VCSEL driver and TIA in fiber-optic sensing modules. IC Role / Device Role / Timing Role: Low-noise, fast-settling voltage source synchronized to optical burst timing. Use Value: Auto pass-through disabled (true shutdown on EN low) eliminates standby leakage across optical subsystem. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61299ADRLR | Same package and pinout; features force pass-through (not true shutdown) at EN low; 0.9V start-up | Suitable where input-output continuity is required during disable (e.g., always-on sensor bias) | Select TPS61299ADRLR only if system requires EN-controlled pass-through; otherwise TPS61299DRLR provides superior isolation. |
| TPS61099YFFR | WCSP-6 (1.2mm×0.8mm); 300nA IQ; 1A input limit; 1.8V–5.5V output; no VSEL - fixed output options | Smaller footprint but lacks programmability and fast transient mode; lower efficiency at light loads | Choose TPS61099YFFR only for space-constrained designs accepting fixed output and higher IQ; TPS61299DRLR offers superior flexibility and efficiency. |
Compared with TPS61299ADRLR and TPS61099YFFR, the TPS61299DRLR uniquely combines true shutdown, VSEL programmability, and sub-100nA quiescent current - making it optimal for battery-critical wearables and medical devices requiring both ultra-low standby and precise voltage control.
Availability
TPS61299DRLR is available at Aetrix Electronics and suitable for smart wearables, portable medical sensors, and optical transceiver modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS61299DRLR 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 TPS61299x family was designed specifically for ultra-low-power portable equipment powered by coin cells and alkaline batteries - prioritizing quiescent current, start-up capability at sub-1V, and small-solution-size integration.
FAQ
What is the start-up voltage requirement for TPS61299DRLR?
The TPS61299DRLR has a 0.7V rising threshold for under-voltage lockout (UVLO), enabling reliable start-up from deeply discharged alkaline or coin-cell batteries. Once started, it continues operating down to 0.5V input, maximizing usable battery capacity. This behavior is confirmed in Section 6.5 of the official datasheet (SLVSGS9G).
Does TPS61299DRLR support programmable output voltage?
Yes - TPS61299DRLR uses the VSEL pin to select one of 21 factory-trimmed output voltages (1.8V–5.5V) via a single external resistor to GND. The setting is latched at power-up and remains fixed until EN is toggled. Resistor tolerance must be ≤1% and VSEL parasitic capacitance <10pF for accurate regulation.
How does the enable (EN) pin behave on TPS61299DRLR?
When EN is pulled low, TPS61299DRLR enters true shutdown mode: switching stops, the high-side MOSFET fully turns off, and input-output isolation is achieved with <60nA VIN shutdown current. This differs from TPS61299ADRLR, which enables force pass-through instead.
What is the typical efficiency of TPS61299DRLR at light load?
TPS61299DRLR achieves up to 91% efficiency at VIN=3.6V, VOUT=5V, and IOUT=10μA due to its 95nA quiescent current and hysteretic PFM/PWM control. Efficiency rises to 94% at 200mA, as verified in Figure 6-1 of the datasheet - critical for extending battery life in intermittent-use devices.
Which package does TPS61299DRLR use, and what are its dimensions?
TPS61299DRLR uses the SOT563 package (6-pin, 1.6mm × 1.6mm body size), distinct from the WCSP variant (TPS61299YBHR). This thermally robust surface-mount package supports standard reflow profiles and is optimized for automated assembly in high-volume wearable production.
TPS61299DRLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TPS61299x
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- -
- Frequency - Switching:
- 1MHz ~ 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
TPS61299DRLR FAQ
1.How can I place an order for TPS61299DRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61299DRLR 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 TPS61299DRLR reliable?
The price and inventory of TPS61299DRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61299DRLR is usually 5 days.
3.What payment methods are accepted for TPS61299DRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61299DRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61299DRLR?
TPS61299DRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61299DRLR 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 TPS61299DRLR?
For technical support, including TPS61299DRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61299DRLR requirements.
6.How does Aetrix verify that TPS61299DRLR is sourced from the original manufacturer or authorized distributors?
All TPS61299DRLR 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 TPS61299DRLR meets industry standards.
7.What is the process for return or replacement of TPS61299DRLR?
All TPS61299DRLR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61299DRLR, 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 TPS61299DRLR part is unused and in its original packaging.
Return procedure for TPS61299DRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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