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Texas Instruments TPS61029DRCR
- Part No.:
- TPS61029DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61029DRCR.pdf
- Description:
- IC REG BOOST ADJ 1.8A 10VSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS61029DRCR from Texas Instruments is a synchronous boost DC-DC converter optimized for single-cell Li-ion, alkaline, or NiMH battery-powered systems. It delivers up to 200 mA at regulated output voltages from 1.8 V to 5.5 V, operates with input as low as 0.9 V, features 96% peak efficiency, and integrates a 1800 mA switch current limit for high-output-power capability in portable medical devices and camera flash circuits.
For engineers reviewing the TPS61029DRCR datasheet, TPS61029DRCR pinout, TPS61029DRCR application, or TPS61029DRCR equivalent, key selection criteria include its 0.9–5.5 V input range, adjustable/fixed output configuration, power-save mode operation, low-battery comparator interface (LBI/LBO), and thermal performance in the 3 mm × 3 mm VSON-10 package.
Technical Context
The TPS61029DRCR implements a fixed-frequency PWM controller with synchronous rectification using integrated N- and P-channel MOSFETs. Input voltage, output voltage, and NMOS switch voltage drop are directly monitored to enable fast duty-cycle response-bypassing slow error-amplifier loop dependence for transient stability.
It supports down-regulation mode when input exceeds output (e.g., 4.2 V Li-ion → 3.6 V white LED), actively controlling PMOS conduction to maintain regulation-increasing conduction loss but enabling seamless transition without external circuitry. Power Save Mode is mandatory in down-regulation and can be disabled via PS pin for fixed-frequency operation above ~10 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.9 V to 5.5 V - enables direct operation from deeply discharged single-cell batteries (e.g., 0.9 V alkaline) and compatibility with fully charged Li-ion (4.2 V) without external LDO pre-regulation. |
| Output Voltage Range | 1.8 V to 5.5 V - programmable via FB pin resistor divider; internal reference is 500 mV ±10 mV, supporting precise regulation across battery discharge curves. |
| Switch Current Limit | 1500 mA to 2100 mA - nominal 1800 mA peak limit (per datasheet Table 6), enabling robust 200 mA output at 3.3 V even under worst-case input (0.9 V) and PCB trace resistance. |
| Quiescent Current | 25 µA typical - ensures >1-year shelf life in always-on portable devices powered by coin cells or primary alkaline batteries. |
| Efficiency | 96% peak - achieved via synchronous rectification (replacing Schottky diode), reducing conduction loss and thermal rise in space-constrained 3 mm × 3 mm layout. |
| Switching Frequency | 480–720 kHz - fixed-frequency PWM with tight tolerance; enables small external inductor (6.8 µH) and ceramic capacitors (10 µF/2.2 µF/47 µF) while minimizing EMI filtering burden. |
| Low-Battery Detection | LBI threshold = 500 mV ±10 mV - user-programmable via resistive divider; LBO is open-drain output requiring external pull-up, enabling host MCU wake-up on battery depletion. |
Pinout & Package
The TPS61029DRCR is housed in a thermally enhanced 3 mm × 3 mm VSON-10 package with exposed PowerPAD™ (must be soldered to PGND for thermal and electrical integrity). Pin 1 is EN; pin 10 is PGND; PowerPAD™ connects internally to PGND and requires PCB copper pour connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic: tie to VBAT to enable; GND to shut down. Enables full load disconnect and reduces shutdown current to ≤1 µA. |
| VOUT (Pin 2) | Regulated boost output | Main power rail output; capable of sourcing up to 200 mA with <±3% total regulation accuracy including line/load effects. |
| FB (Pin 3) | Feedback input | Monitors output via resistor divider; internal 500 mV reference sets output voltage as VO = 500 mV × (1 + R3/R4); supports adjustable configurations only. |
| LBO (Pin 4) | Low-battery open-drain output | Active-low flag; requires external 1 MΩ pull-up; asserts when LBI voltage drops below 500 mV, signaling host system battery depletion. |
| GND (Pin 5) | Logic ground reference | Reference for EN, PS, FB, LBI inputs and internal control circuitry; must be connected separately from PGND and joined at single point near GND pin. |
| VBAT (Pin 6) | Main input supply | Accepts 0.9–5.5 V; supplies internal bias and gate drivers; undervoltage lockout triggers at ~0.8 V to prevent erratic startup. |
| LBI (Pin 7) | Low-battery comparator input | High-impedance input (≤0.1 µA leakage); accepts scaled battery voltage; must not float-tie to GND or VBAT if unused. |
| PS (Pin 8) | Power Save Mode control | Active-low: GND enables power save (variable frequency, high light-load efficiency); VBAT forces fixed-frequency PWM operation. |
| SW (Pin 9) | Boost switch node | Connects to inductor and catch diode (integrated PMOS); carries high di/dt switching current; requires tight layout and antiringing design. |
| PGND (Pin 10) | Power ground return | Source connection for NMOS switch; handles high pulsed currents; must be routed separately from GND and joined at single point near GND pin. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated N- and P-channel MOSFETs replace Schottky diode, reducing forward drop and enabling 96% peak efficiency at 200 mA. |
| Down-regulation capability | Regulates output even when VBAT ≥ VOUT (e.g., 4.2 V Li-ion → 3.6 V LED), eliminating need for external buck-boost or LDO in mixed-voltage systems. |
| Load disconnect during shutdown | Internal circuit isolates VOUT from VBAT when EN = low, preventing battery drain through output capacitors or downstream loads. |
| Integrated anti-ringing switch | Clamps SW node to VBAT during discontinuous conduction mode, suppressing high-frequency ringing and reducing radiated EMI without external snubbers. |
| Thermal protection | Overtemperature shutdown activates at TJ = 140°C ±20°C hysteresis, protecting device during sustained overload or poor PCB thermal design. |
Applications
| Portable Medical Sensors | Camera Flash LED Drivers |
|---|---|
|
Use Scenario: Wearable pulse oximeter powered by single AAA alkaline cell, operating down to 0.9 V while driving analog front-end and BLE radio. IC Role / Device Role / Timing Role: Primary power regulator generating stable 3.3 V rail from decaying battery voltage; manages dynamic load steps during LED pulsing and signal acquisition. Use Value: 96% efficiency extends runtime by >35% vs diode-based boosters; down-regulation avoids brownout during 4.2 V Li-ion charge cycles; LBO alerts MCU before sensor data corruption. |
Use Scenario: Smartphone rear-camera module requiring 3.6 V white LED flash from shared 3.3 V system rail or single-cell battery. IC Role / Device Role / Timing Role: High-current boost driver delivering 200 mA pulses with fast transient response; supports burst-mode flash timing synchronized to image capture. Use Value: 1800 mA switch limit ensures reliable 200 mA delivery into LED string even at 0.9 V input; low EMI mode minimizes interference with RF receivers during flash activation. |
| Handheld Audio Players | Industrial Handheld Scanners |
|
Use Scenario: MP3 player using single Li-polymer cell (3.0–4.2 V) to power DAC, headphone amp, and display backlight. IC Role / Device Role / Timing Role: Dual-rail generator: 3.3 V for logic and 5.0 V for backlight; dynamically adjusts output based on battery state and load demand. Use Value: Adjustable output allows one BOM for multiple display types; 25 µA quiescent current preserves standby time; PS pin enables firmware-controlled efficiency optimization. |
Use Scenario: Rugged barcode scanner powered by two AA alkaline cells (1.8–3.2 V), requiring 5 V for imager and 3.3 V for MCU during intermittent scanning bursts. IC Role / Device Role / Timing Role: Main system power manager providing regulated outputs during high-current decode events; monitors battery health via LBI/LBO. Use Value: 0.9 V start-up enables full functionality until battery reaches end-of-life; load disconnect prevents parasitic drain during sleep; VSON-10 footprint fits compact industrial enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61026DRCR | Fixed 5 V output; 1800 mA switch limit; same 0.9–5.5 V input range and VSON-10 package. | Eliminates FB resistor network; suited for systems requiring only 5 V output without adjustment. | Select when fixed 5 V simplifies BOM and layout; not suitable for adjustable or sub-5 V outputs. |
| TPS61027DRCR | Fixed 5 V output; 1500 mA switch limit; identical pinout and thermal specs but lower current capability. | Lower cost option where 200 mA max load is sufficient and margin for inductor saturation is acceptable. | Choose for cost-sensitive designs with predictable ≤150 mA loads; verify inductor DCR and thermal rise at peak current. |
Compared with TPS61026DRCR and TPS61027DRCR, the TPS61029DRCR provides adjustable output voltage and higher 1800 mA switch current limit-making it optimal for multi-rail, variable-battery, or high-pulse-current applications where flexibility and headroom are critical.
Availability
TPS61029DRCR is available at Aetrix Electronics and suitable for portable medical sensors, camera flash LED drivers, handheld audio players, industrial handheld scanners, and battery-powered IoT edge nodes requiring stable component supply across long product lifecycles.
Supply support for TPS61029DRCR 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 ICs, with decades of expertise in battery-powered system solutions.
The TPS6102x family was designed specifically for ultra-low-input-voltage, high-efficiency boost conversion in space-constrained portable electronics-emphasizing deep-discharge operation, integrated protection, and minimal external component count.
FAQ
What is the minimum input voltage required for TPS61029DRCR to start switching?
The TPS61029DRCR requires a minimum input voltage of 0.9 V to initiate startup, verified per datasheet Section 8.5. This enables operation from nearly depleted single-cell alkaline or NiMH batteries. Startup current is limited to 40% of nominal switch current to avoid excessive battery stress, and the device enters fixed 50% duty cycle mode until output reaches 1.4 V.
Does TPS61029DRCR support output voltages lower than the input voltage?
Yes, the TPS61029DRCR supports down-regulation mode when VBAT ≥ VOUT. In this mode, the internal PMOS rectifier is controlled to develop a variable voltage drop, maintaining regulation without external components. Down-regulation activates automatically when input exceeds output by ≤50 mV and is mandatory in Power Save Mode.
How is the low-battery detection threshold set on TPS61029DRCR?
The TPS61029DRCR uses an internal 500 mV comparator reference at the LBI pin. A resistive divider from VBAT to GND scales battery voltage to match this threshold-for example, R1 = 390 kΩ and R2 = 200 kΩ sets detection at ~1.0 V. LBI input current is ≤0.1 µA, ensuring minimal divider loading and accurate threshold setting.
What thermal considerations apply to TPS61029DRCR in the VSON-10 package?
The TPS61029DRCR has a junction-to-board thermal resistance (RθJB) of 21.6°C/W and requires the PowerPAD™ to be soldered to a dedicated PGND copper pour. At 200 mA output into 3.3 V with 0.9 V input, power dissipation exceeds 1 W-necessitating ≥2 cm² of 2-oz copper on inner layers and thermal vias under the PowerPAD™ to maintain TJ < 125°C.
Can TPS61029DRCR be used without the FB resistor divider?
No-TPS61029DRCR is an adjustable-output variant and requires an external resistor divider on the FB pin to set output voltage. Unlike fixed-output versions (e.g., TPS61026DRCR), it does not have internal feedback resistors. Omitting the divider results in undefined output voltage and potential overvoltage damage to downstream circuitry.
TPS61029DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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):
- 0.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.8A (Switch)
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS61029DRCR FAQ
1.How can I place an order for TPS61029DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61029DRCR 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 TPS61029DRCR reliable?
The price and inventory of TPS61029DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61029DRCR is usually 5 days.
3.What payment methods are accepted for TPS61029DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61029DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61029DRCR?
TPS61029DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61029DRCR 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 TPS61029DRCR?
For technical support, including TPS61029DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61029DRCR requirements.
6.How does Aetrix verify that TPS61029DRCR is sourced from the original manufacturer or authorized distributors?
All TPS61029DRCR 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 TPS61029DRCR meets industry standards.
7.What is the process for return or replacement of TPS61029DRCR?
All TPS61029DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61029DRCR, 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 TPS61029DRCR part is unused and in its original packaging.
Return procedure for TPS61029DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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