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Texas Instruments TPS61045ADRBR
- Part No.:
- TPS61045ADRBR
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS61045ADRBR.pdf
- Description:
- IC REG BOOST ADJ 300MA 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:4,978
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Product details
Overview
TPS61045ADRBR from Texas Instruments is a digitally adjustable high-frequency boost converter IC designed for LCD bias and OLED display power supply applications. It operates from 1.8 V to 6 V input, delivers up to 28 V output, features true shutdown with 0.1 µA shutdown current, integrates a 6-bit DAC for digital voltage programming via CTRL pin, and uses PFM peak-current control with 375 mA typical current limit.
For engineers reviewing the TPS61045ADRBR datasheet, TPS61045ADRBR pinout, TPS61045ADRBR application, or TPS61045ADRBR equivalent, key selection considerations include its 1 MHz max switching frequency enabling compact 4.7 µH inductor use, 1.233 V internal reference with ±25 mV feedback trip point tolerance, thermal shutdown at ~160 °C, 3-mm × 3-mm VSON-8 package with exposed thermal pad tied to PGND, and digital step resolution of 19.6 mV on DO pin.
Technical Context
The TPS61045ADRBR implements constant peak-current PFM control with a typical 375 mA switch current limit and 6 µs maximum on-time, ensuring stable discontinuous conduction mode (DCM) operation across load and input ranges. Its regulation relies on comparing FB voltage against a 1.233 V internal reference, with feedback bias current under 100 nA.
It integrates dual MOSFET switches: Q1 (input switch, 1–2 Ω rDS(on)) disconnects VIN from L during shutdown, and Q2 (main switch, 400–800 mΩ rDS(on)) drives the inductor. The CTRL pin serves as combined enable and digital interface, while DO provides a 0–1.233 V 6-bit DAC output to adjust feedback network effective resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 6 V - supports single-cell Li-ion, NiMH, or 2–3 alkaline batteries without pre-regulation. |
| Max Output Voltage | 28 V - sufficient for biasing medium-size TFT-LCD panels and monochrome OLED displays. |
| Switching Frequency | Up to 1 MHz - enables use of small 4.7 µH inductors and low-ESR ceramic capacitors for minimal board area. |
| Peak Switch Current | 375 mA typical - sets maximum deliverable output power at given VIN/VO; limits inductor saturation requirement. |
| Feedback Reference | 1.233 V ±25 mV - defines regulation accuracy; low 30–100 nA FB bias current minimizes divider resistor power loss. |
| DAC Resolution | 6-bit (64 steps), 19.6 mV/step - enables precise digital tuning of output voltage via timing pulses on CTRL pin. |
| Shutdown Current | 0.1 µA typical - preserves battery life in portable devices during display-off states. |
| Junction Temp Limit | Thermal shutdown at ~160 °C - protects device during overload or poor PCB thermal design. |
Pinout & Package
TPS61045ADRBR is housed in an 8-pin VSON package (DRB) measuring 3.00 mm × 3.00 mm with an exposed thermal pad connected to PGND. The pad must be soldered directly to a large GND copper area for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| L | Input switch drain | Connects to inductor; internal Q1 switch isolates VIN from L during shutdown. |
| VIN | Input supply | Accepts 1.8–6 V; UVLO activates below 1.5 V to prevent erratic startup. |
| DO | DAC output | 0–1.233 V 6-bit DAC output; programs VO by altering effective R2–R3 parallel resistance in feedback network. |
| FB | Feedback input | Senses output voltage divider; 1.233 V reference sets regulation point; bias current ≤100 nA. |
| GND | Analog ground | Must be shorted directly to PGND; separates analog sensing from power return path. |
| CTRL | Enable & digital interface | Pull high to enable; pulse low (1–60 µs) to increase VO, (140–240 µs) to decrease VO, ≥560 µs to shut down. |
| PGND | Power ground | Main return for switch currents; connects to exposed thermal pad for heat dissipation. |
| SW | Main switch drain | Drives inductor and Schottky diode anode; rated for 30 V max; internal Q2 has 400–800 mΩ rDS(on). |
Key Features
| Feature | Design Value |
|---|---|
| Digitally programmable output | 6-bit DAC on DO pin enables 64-step voltage adjustment without external DAC or microcontroller GPIO. |
| True input-output disconnect | Internal Q1 switch opens during shutdown, eliminating leakage path from VIN to VO - critical for display sequencing. |
| PFM peak-current control | Maintains >70% efficiency from 0.1 mA to 10 mA load; no external compensation required due to inherent DCM stability. |
| Low quiescent current | 40 µA typical operating IQ and 0.1 µA shutdown current extend battery runtime in always-on display systems. |
| Integrated thermal protection | Automatic shutdown at ~160 °C junction temperature prevents damage during sustained overload or poor heatsinking. |
| Small solution size | VSON-8 (3×3 mm) + 4.7 µH inductor + 1 µF output capacitor achieves <25 mm² total footprint for portable designs. |
Applications
| Smartphone LCD Bias Supply | OLED Display Power |
|---|---|
Use Scenario: Providing adjustable positive bias (16–19 V) to source driver ICs in 3–5 inch smartphone TFT-LCD modules. IC Role / Device Role / Timing Role: Boost converter with digital VO trim; regulates panel VGH using feedback divider with R1/R2/R3 and DO pin. Use Value: Enables factory calibration of VGH per panel batch via CTRL pin pulses, reducing binning cost and improving yield. | Use Scenario: Generating 15–18 V anode supply for passive-matrix monochrome OLED displays in handheld medical instruments. IC Role / Device Role / Timing Role: Digitally tuned DC-DC converter; DO pin adjusts VO to compensate for OLED aging and temperature drift over time. Use Value: Maintains consistent brightness without firmware update or hardware change - extends usable display lifetime by 20%+. |
| Portable Diagnostic Device Backlight | Industrial HMI Display Power |
Use Scenario: Driving white LED strings (3–4 LEDs in series) requiring 12–18 V at 10 mA in battery-powered ultrasound probes. IC Role / Device Role / Timing Role: High-efficiency boost regulator with true shutdown; CTRL pin controls both enable and dimming-level mapping. Use Value: Eliminates need for separate enable logic and analog dimming circuit - reduces BOM count by 3 components. | Use Scenario: Supplying stable 18 V bias for segmented LCDs in ruggedized industrial HMIs operating from 24 V rail via LDO pre-regulator. IC Role / Device Role / Timing Role: Secondary boost stage with thermal shutdown; SW and PGND pins routed to thick copper for 85 °C ambient operation. Use Value: Survives extended high-temp operation where standard boost converters derate or fail - improves field reliability MTBF by 3×. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61042DRBR | Fixed 18-V output; no digital control; same VSON-8 package and 1.8–6 V input range. | Used where VO is static and calibration not needed - e.g., fixed-panel OEM designs. | Select when digital trimming adds unnecessary complexity and cost; saves firmware development effort. |
| MAX17065ETA+ | 3-MHz switching, 2.5-V min input, integrated Schottky, but only 5-V max VO and no DAC. | Targets low-VO, high-frequency apps like camera flash drivers - not suitable for >15-V LCD bias. | Choose only for sub-10-V boost needs; incompatible for TPS61045ADRBR's 18–28 V range and digital adjust capability. |
Compared with TPS61042DRBR, the TPS61045ADRBR trades fixed output simplicity for field-programmable voltage tuning; compared with MAX17065ETA+, it offers higher output voltage headroom and digital interface at lower switching frequency - making it uniquely suited for calibrated display bias in portable equipment.
Availability
TPS61045ADRBR is available at Aetrix Electronics and suitable for smartphone LCD bias supply, OLED display power, portable diagnostic device backlight, and industrial HMI display power requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS61045ADRBR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TPS61045ADRBR belongs to TI's LCD/OLED display power management product line, engineered specifically for compact, battery-efficient, digitally tunable high-voltage bias generation in portable visual interfaces.
FAQ
What is the function of the DO pin on the TPS61045ADRBR?
The DO pin on the TPS61045ADRBR is a 6-bit DAC output that drives an external resistor (R3) in the feedback network to digitally adjust the output voltage. Its voltage ranges from 0 V to 1.233 V in 19.6 mV steps; 0 V yields maximum VO, and 1.233 V yields minimum VO. This eliminates need for external DAC or microcontroller-controlled resistors in the TPS61045ADRBR design.
How does the CTRL pin control both enable and output voltage on the TPS61045ADRBR?
The CTRL pin on the TPS61045ADRBR serves dual roles: pulling it high enables the device with soft-start, while timed low pulses program the DAC. A 1–60 µs low pulse increases VO one step; 140–240 µs decreases VO one step; ≥560 µs shuts down the TPS61045ADRBR with 0.1 µA current draw. No external logic is required to implement this interface in the TPS61045ADRBR.
What is the recommended inductor value for typical TPS61045ADRBR operation at 10 mA load?
Texas Instruments recommends a 4.7 µH inductor (e.g., Murata LQH32CN4R7M11) for typical TPS61045ADRBR operation delivering 18 V at 10 mA from 3.6 V input. This value balances switching frequency (~800 kHz), efficiency (>82%), and solution size. Inductor saturation current must exceed 450 mA to accommodate peak switch current in the TPS61045ADRBR.
Does the TPS61045ADRBR require external compensation components?
No, the TPS61045ADRBR does not require external compensation components. Its PFM peak-current control architecture operating in discontinuous conduction mode (DCM) provides inherent stability across input, output, and load variations. The only required external components are the inductor, input/output capacitors, feedback resistors (R1/R2/R3), feed-forward capacitor (Cff), and Schottky diode - all specified in the TPS61045ADRBR datasheet.
What thermal management is required for reliable TPS61045ADRBR operation at 85°C ambient?
For reliable TPS61045ADRBR operation at 85°C ambient, the exposed thermal pad must be soldered to a minimum 100 mm² copper pour connected to PGND with ≥4 thermal vias (0.3 mm diameter). With this layout, the junction-to-ambient thermal resistance drops from 270 °C/W to ~65 °C/W, keeping TJ below 125°C at full load - well within the TPS61045ADRBR's 150°C absolute max rating.
TPS61045ADRBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN 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):
- 1.8V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 300mA (Switch)
- Frequency - Switching:
- Up to 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
TPS61045ADRBR FAQ
1.How can I place an order for TPS61045ADRBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61045ADRBR 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 TPS61045ADRBR reliable?
The price and inventory of TPS61045ADRBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61045ADRBR is usually 5 days.
3.What payment methods are accepted for TPS61045ADRBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61045ADRBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61045ADRBR?
TPS61045ADRBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61045ADRBR 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 TPS61045ADRBR?
For technical support, including TPS61045ADRBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61045ADRBR requirements.
6.How does Aetrix verify that TPS61045ADRBR is sourced from the original manufacturer or authorized distributors?
All TPS61045ADRBR 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 TPS61045ADRBR meets industry standards.
7.What is the process for return or replacement of TPS61045ADRBR?
All TPS61045ADRBR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61045ADRBR, 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 TPS61045ADRBR part is unused and in its original packaging.
Return procedure for TPS61045ADRBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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