My Inquiry
My Account
Texas Instruments TPS61045DRBRG4
- Part No.:
- TPS61045DRBRG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS61045DRBRG4.pdf
- Description:
- IC REG BOOST ADJ 300MA 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,594
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS61045 from Texas Instruments is a digitally adjustable, high-frequency boost converter IC designed for LCD/OLED display bias supply. It operates from 1.8 V to 6 V input, delivers up to 28 V output (programmable in 19.6 mV DAC steps), achieves 85% efficiency at 10 mA load, and features true shutdown with 0.1 μA quiescent current - enabling precise power sequencing in portable displays.
For engineers reviewing the TPS61045 datasheet, TPS61045 pinout, TPS61045 application, or TPS61045 equivalent, key selection considerations include its 6-bit DAC-controlled output voltage, PFM peak-current regulation architecture, 1 MHz max switching frequency, integrated 375 mA main switch, and thermal shutdown protection - all in a compact 3 mm × 3 mm VSON-8 package.
Technical Context
The TPS61045 implements pulse-frequency modulation (PFM) with constant peak-current control, using an internal 375 mA (typical) current limit and 6 μs maximum on-time to regulate output voltage. Its feedback loop references a stable 1.233 V internal bandgap, and output voltage is adjusted digitally via a 6-bit DAC driving the DO pin (0–1.233 V range) to modify the external resistor divider network.
Control logic resides entirely on-chip: the CTRL pin serves dual roles - enable/disable and digital step programming - with timing-defined pulses (1–60 μs for up-step, 140–240 μs for down-step, ≥560 μs for shutdown). The device remains in discontinuous conduction mode (DCM) across its operating range, ensuring inherent stability without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 6 V - supports single-cell Li-ion, NiMH, or alkaline battery inputs without pre-regulation. |
| Max Output Voltage | 28 V - sufficient for biasing medium-size TFT-LCD gate drivers and OLED anode supplies. |
| Switching Frequency | Up to 1 MHz - enables use of small 4.7 μH inductors and 1 μF ceramic output capacitors. |
| Peak Switch Current | 375 mA typical - sets maximum deliverable power and constrains inductor saturation rating. |
| DAC Resolution | 6-bit (64 steps) - provides fine-grained 19.6 mV output voltage adjustment per step at DO pin. |
| Shutdown Current | 0.1 μA typical - minimizes battery drain during display off-state in portable devices. |
| Feedback Reference | 1.233 V ±25 mV - defines precision of output voltage regulation across temperature and load. |
Pinout & Package
TPS61045 is housed in an 8-pin VSON package (DRB variant), 3.00 mm × 3.00 mm body size, with exposed thermal pad connected to PGND. The package supports high-power-density layout and requires direct thermal connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| L | Internal input switch drain | Connects to inductor; carries full input current during switch-on phase. |
| VIN | Input supply | Accepts 1.8–6 V DC; must be decoupled with ≥4.7 μF ceramic capacitor near pin. |
| DO | DAC output | Drives external R3 resistor to adjust feedback node voltage; 0–1.233 V range, 6-bit resolution. |
| FB | Feedback input | Senses divided output voltage; comparator trips at 1.233 V to control switching cycle. |
| GND | Analog ground | Reference for FB and internal circuitry; must be tied directly to PGND with low-inductance path. |
| CTRL | Enable & digital control | Pull high to enable; pulse low for defined durations to increment/decrement DAC output or shut down. |
| PGND | Power ground | Return path for high-current switch nodes (SW, L); connects to exposed thermal pad. |
| SW | Main switch drain | Drives inductor and Schottky diode anode; switches at up to 1 MHz with 30 V max rating. |
Key Features
| Feature | Design Value |
|---|---|
| Digitally adjustable output | 6-bit DAC (64 steps) on DO pin enables firmware-controlled voltage tuning without hardware changes. |
| True shutdown disconnect | Internal Q1 switch opens during shutdown, isolating VIN from output - prevents backfeed and enables clean power sequencing. |
| PFM peak-current control | Maintains >75% efficiency from 1 mA to 10 mA load while operating inherently stable in DCM - no external compensation needed. |
| Low-noise softstart | Gradual turn-on of input switch limits inrush current, preventing input rail droop that could reset host microcontrollers. |
| Thermal shutdown protection | Halts switching at ~160°C junction temperature and resumes automatically after cooldown - protects against sustained overload or poor heatsinking. |
Applications
| Small-to-Medium LCD Bias Supply | OLED Display Power Supply |
|---|---|
Use Scenario: Powering gate-on/gate-off voltages (VGH/VGL) for 3–7 inch TFT-LCD panels in handheld medical monitors and industrial HMIs. IC Role / Device Role / Timing Role: Boost converter generating programmable 16–19 V outputs with fast transient response to panel refresh cycles. Use Value: Digital voltage adjustment allows dynamic contrast optimization and panel-specific calibration without BOM changes. | Use Scenario: Providing anode bias (12–18 V) and cathode bias (−2 to −5 V, with external inverter) for monochrome and color OLED modules in smartwatches and wearables. IC Role / Device Role / Timing Role: Primary high-efficiency boost stage delivering stable current-limited output under varying pixel brightness loads. Use Value: 85% efficiency at light loads extends battery life; 0.1 μA shutdown current preserves charge during sleep mode. |
| PDA & Smart Phone Display Backlight | Portable Diagnostic Instrument Power |
Use Scenario: Driving white LED strings or electroluminescent (EL) backlight layers requiring 15–25 V in legacy PDAs and ruggedized smartphones. IC Role / Device Role / Timing Role: Digitally tuned boost regulator synchronized with display controller enable signals for seamless on/off transitions. Use Value: CTRL pin dual functionality eliminates need for separate enable and I²C bus, reducing GPIO count and PCB area. | Use Scenario: Generating isolated high-voltage rails for analog front-end sensors (e.g., photomultiplier tube bias, piezoelectric transducer excitation) in battery-powered field diagnostic tools. IC Role / Device Role / Timing Role: Compact, low-quiescent boost source delivering stable 20–28 V at ≤5 mA with minimal EMI impact on sensitive analog measurements. Use Value: 1 MHz switching allows use of shielded 4.7 μH inductors that suppress radiated noise - critical for signal integrity in measurement systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61042DRBR | No digital control; fixed-output variants only (15 V, 18 V, 22 V); same 3×3 VSON package and 375 mA switch. | Requires hardware change (resistor divider or part number swap) to alter output voltage; lacks CTRL-based sequencing. | Select when output voltage is static and lowest BOM cost is prioritized over programmability. |
| MAX17064ETE+ | Higher 40 V output capability; 2.5 MHz switching; integrated MOSFETs; but larger 16-pin TQFN package and higher quiescent current (25 μA active). | Better suited for high-voltage industrial displays; less optimal for space-constrained portable designs due to footprint and thermal density. | Select when >28 V output or faster transient response is required, and board area permits larger package. |
Compared with TPS61045, TPS61042DRBR offers identical efficiency and footprint but sacrifices digital adjustability, while MAX17064ETE+ extends voltage range and speed at the cost of higher static power and larger layout footprint - making TPS61045 the optimal balance for programmable, space-sensitive display bias in portable electronics.
Availability
TPS61045 is available at Aetrix Electronics and suitable for LCD bias supply, OLED display power, and portable diagnostic instrument applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS61045 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 decades of expertise in high-efficiency DC/DC conversion.
The TPS61045 belongs to TI's display power management product line, engineered specifically for low-power, digitally controllable bias generation in portable visual interfaces - emphasizing small solution size, sequencing control, and battery longevity.
FAQ
What is the maximum output voltage achievable with the TPS61045?
The TPS61045 supports a maximum output voltage of 28 V, as specified in its absolute maximum ratings and confirmed in the device description. This limit is enforced by the 30 V maximum SW pin voltage rating and internal protection circuits. Operation beyond 28 V risks damage to the internal main switch (Q2) and violates recommended operating conditions - users must design feedback dividers and external components to ensure VO never exceeds this value under all load, line, and temperature conditions.
How does the CTRL pin function in the TPS61045?
The CTRL pin in the TPS61045 serves two distinct functions: it acts as both an enable/disable control and a digital interface for output voltage adjustment. Pulling CTRL high enables the device and initiates softstart; holding CTRL low for ≥560 μs places the TPS61045 in true shutdown (0.1 μA current). Pulses of 1–60 μs or 140–240 μs on CTRL respectively increment or decrement the internal 6-bit DAC, adjusting the DO pin voltage and thus the regulated output voltage in discrete steps.
What inductor value is recommended for the TPS61045?
Texas Instruments recommends a 4.7 μH inductor as the default value for the TPS61045, as validated in the typical application circuit and electrical characteristics tables. This value balances switching frequency (≤1 MHz), efficiency (>80% at 10 mA), and solution size. Inductors must have ≥450 mA saturation current (to accommodate peak ILIM) and low DC resistance; examples include Sumida CDRH3D16-4R7 and Murata LQH32CN4R7M51 - both qualified for use with the TPS61045 in production designs.
Does the TPS61045 require external compensation components?
No, the TPS61045 does not require external compensation components. Its PFM peak-current control architecture operating in discontinuous conduction mode (DCM) provides inherent loop stability across the full load and input voltage range. The device only requires standard external passive components: input/output capacitors, inductor, feedback resistors, and optional feed-forward capacitor (Cff) across R1 to prevent double-pulsing - no op-amps, RC networks, or compensation pins are needed for stable operation.
What is the role of the DO pin in the TPS61045?
The DO (DAC Output) pin in the TPS61045 is a voltage-controlled node that sources/sinks current to adjust the effective resistance of the external feedback divider. Driven by a 6-bit internal DAC, DO outputs 0–1.233 V in 19.6 mV steps; connecting it to resistor R3 in parallel with R2 shifts the feedback ratio, thereby digitally programming the output voltage. When DO = 0 V, output is maximized; when DO = 1.233 V, output is minimized - enabling precise, software-controlled regulation without changing hardware.
TPS61045DRBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
TPS61045DRBRG4 FAQ
1.How can I place an order for TPS61045DRBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61045DRBRG4 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 TPS61045DRBRG4 reliable?
The price and inventory of TPS61045DRBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61045DRBRG4 is usually 5 days.
3.What payment methods are accepted for TPS61045DRBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61045DRBRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61045DRBRG4?
TPS61045DRBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61045DRBRG4 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 TPS61045DRBRG4?
For technical support, including TPS61045DRBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61045DRBRG4 requirements.
6.How does Aetrix verify that TPS61045DRBRG4 is sourced from the original manufacturer or authorized distributors?
All TPS61045DRBRG4 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 TPS61045DRBRG4 meets industry standards.
7.What is the process for return or replacement of TPS61045DRBRG4?
All TPS61045DRBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61045DRBRG4, 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 TPS61045DRBRG4 part is unused and in its original packaging.
Return procedure for TPS61045DRBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61045DRBRG4 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
