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Texas Instruments TPS62043DGQ
- Part No.:
- TPS62043DGQ
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62043DGQ.pdf
- Description:
- IC REG BUCK 1.6V 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,471
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Product details
Overview
TPS62043DGQ from Texas Instruments is a 1.6 V fixed-output, 1.2 A synchronous step-down DC-DC converter in a 10-pin MSOP PowerPad™ package, operating at 1.25 MHz with 95% peak efficiency and 18 µA quiescent current. It supports input voltages from 2.5 V to 6.0 V and features power save mode, internal softstart, and thermal shutdown - optimized for Li-Ion–powered portable systems like smart phones and PDAs.
For engineers reviewing the TPS62043DGQ datasheet, TPS62043DGQ pinout, TPS62043DGQ application, or TPS62043DGQ equivalent, this page delivers verified electrical parameters, validated package mapping, confirmed pin functions, real-world load transient behavior, and two rigorously cross-referenced alternative parts for design-in evaluation.
Technical Context
The TPS62043DGQ implements a voltage-mode synchronous buck architecture with input voltage feed-forward control, enabling fast line/load regulation and compatibility with small ceramic capacitors (22 µF input/output). Its dual-MOSFET power stage includes P-channel (115 mΩ typ. @ 3.6 V) and N-channel (85 mΩ typ. @ 3.6 V) switches, supporting 100% duty cycle operation for ultra-low dropout.
Operation dynamically shifts between fixed-frequency PWM (1.25 MHz) at medium-to-heavy loads and pulse-frequency modulation (PFM) at light loads, maintaining ≥85% efficiency down to 1 mA. The MODE pin enables forced-PWM mode for noise-sensitive applications, while the FB pin is internally tied to the 0.5 V reference - no external divider required for the fixed 1.6 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.6 V ±3% over 0–1.2 A load and −40°C to 85°C ambient |
| Max output current | 1.2 A continuous; current limit threshold 1.5–2.2 A ensures robust overload handling |
| Switching frequency | 1.25 MHz nominal (1–1.5 MHz range); enables compact 6.2 µH inductor and minimal EMI filtering |
| Quiescent current | 18 µA typical in power save mode - extends battery life in always-on portable devices |
| Input voltage range | 2.5 V to 6.0 V - fully supports single-cell Li-Ion (2.7–4.2 V) and 3-cell NiMH/NiCd (3.6 V nominal) |
| Efficiency peak | 95% at 600 mA, 3.6 VIN → 1.6 VOUT - reduces thermal load in space-constrained PCBs |
| Thermal shutdown | Activates at 150°C junction temperature; resumes operation after cooldown to ~150°C |
Pinout & Package
TPS62043DGQ uses a thermally enhanced 10-pin MSOP PowerPad™ package (3.0 mm × 3.0 mm × 1.0 mm), where the exposed PowerPAD must be soldered to PCB ground for optimal thermal performance (RθJA = 60°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic: tie to VIN to enable; pull to GND for <1 µA shutdown current |
| 2,3 - VIN | Power input | Dual pins reduce IR drop and improve high-current path integrity for 1.2 A operation |
| 4 - GND | Analog ground | Reference for FB and internal bias circuits; separate from PGND to minimize noise coupling |
| 5 - FB | Feedback input | Internally connected to 0.5 V reference - no external resistor network needed for fixed 1.6 V output |
| 6 - MODE | Operating mode select | Pull low for automatic PWM/PFM; pull high for forced fixed-frequency PWM (625 kHz in PFM fallback) |
| 7,8 - SW | Power switch node | Drain connection of internal P- and N-channel MOSFETs; requires tight layout to minimize EMI and ringing |
| 9,10 - PGND | Power ground | High-current return path for SW and internal FETs; must be low-inductance and tied to PowerPAD |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic voltage positioning | Maintains output 0.8% above nominal at light load, reducing voltage droop during 1.2 A transients by >30 mV |
| 100% duty cycle operation | Enables regulation down to VIN − VOUT ≈ 100 mV at 1.2 A, maximizing usable battery voltage range |
| Internal softstart | Digital ramp limits inrush current to ≤ILIM/2 during startup, preventing input rail collapse on weak sources |
| Short-circuit protection | Reduces switching frequency and current limit to 50% when VOUT < 0.8 V, limiting fault energy during start-up |
| Thermal foldback | Gradually reduces output current as junction temperature approaches 150°C, avoiding abrupt shutdown |
Applications
| Smart Phone Core Rail | USB-Powered Modem |
|---|---|
Use Scenario: Powers ARM Cortex-A series application processor core at 1.6 V from single-cell Li-Ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable 1.6 V/1.2 A with dynamic voltage positioning for burst-mode CPU loads. Use Value: 95% efficiency at 600 mA extends talk time; 18 µA quiescent current minimizes standby drain; 1.25 MHz switching allows use of 6.2 µH shielded inductor <3.0 mm height. |
Use Scenario: Converts 5 V USB supply to 1.6 V for baseband DSP and RF front-end ICs in portable DSL modems. IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator with fast load transient response (<50 µs recovery from 150 mA → 1.15 A step). Use Value: Power save mode maintains >85% efficiency at 10 mA idle current; MODE pin enables forced PWM during data transmission to suppress conducted EMI. |
| PDA Application Processor | Notebook Subsystem Rail |
Use Scenario: Supplies 1.6 V to OMAP or i.MX application processors in handheld PDAs powered by 3.6 V NiMH packs. IC Role / Device Role / Timing Role: Main system PMIC buck channel with integrated softstart and thermal shutdown for reliable cold-start operation. Use Value: 100% duty cycle operation sustains regulation until battery drops to 1.7 V, adding ~12% runtime vs. non-dropout converters. |
Use Scenario: Generates 1.6 V auxiliary rail for embedded controller (EC) or touchpad ASIC in ultraportable notebooks. IC Role / Device Role / Timing Role: Compact, low-noise point-of-load regulator using MSOP PowerPad for direct thermal coupling to PCB copper. Use Value: 3.0 mm × 3.0 mm footprint saves board area; PowerPAD soldering reduces θJA to 60°C/W, enabling full 1.2 A in 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62043DRC | Same electrical specs and pinout, but in 3 mm × 3 mm QFN package with lower RθJA (48.7°C/W) and no exposed PowerPAD requirement | Better thermal performance in high-power-density layouts; requires different land pattern and reflow profile | Select DRC for higher ambient temperature operation (>70°C) or when PCB thermal vias are impractical |
| TPS62130ARGTR | Higher 3 A output, 2.5–6 V input, 1.6 V fixed option, but 2.5 MHz switching and different pinout (16-pin VQFN) | Supports higher current loads and faster transient response; not pin-compatible or drop-in replaceable | Choose ARGTR only when scaling beyond 1.2 A or requiring <1 µs transient response - redesign required |
Compared with TPS62043DGQ, the DRC offers superior thermal dissipation in the same footprint but demands QFN assembly capability, while the ARGTR provides headroom for future current scaling at the cost of layout redesign and higher quiescent current (25 µA).
Availability
TPS62043DGQ is available at Aetrix Electronics and suitable for smart phone core rails, USB-powered modems, PDA application processors, notebook subsystem rails, and xDSL terminal equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TPS62043DGQ 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 for portable and industrial systems.
The TPS6204x product line was designed specifically for battery-powered portable electronics requiring high efficiency across wide load ranges, minimal board area, and robust protection features - targeting PDA, smart phone, and subnotebook applications.
FAQ
What is the fixed output voltage of the TPS62043DGQ?
The TPS62043DGQ delivers a factory-trimmed fixed output voltage of 1.6 V with ±3% tolerance across full load (0–1.2 A) and temperature (−40°C to 85°C). Unlike the adjustable TPS62040, it requires no external feedback resistors - the FB pin is internally connected to the 0.5 V reference, simplifying layout and reducing BOM count.
Does the TPS62043DGQ support 100% duty cycle operation, and what is its benefit?
Yes, the TPS62043DGQ supports true 100% duty cycle operation, allowing regulation even when input voltage drops within ~100 mV of the 1.6 V output. This extends usable battery life in Li-Ion systems by enabling full discharge down to ~1.7 V, adding measurable runtime compared to converters with minimum dropout limitations.
How does the MODE pin affect TPS62043DGQ operation?
When MODE is pulled low, the TPS62043DGQ automatically switches between PWM (1.25 MHz) at heavy loads and PFM at light loads for peak efficiency. Pulling MODE high forces continuous PWM mode - useful for EMI-sensitive applications - though quiescent current rises to ~7 µA and light-load efficiency decreases.
What thermal considerations apply to the TPS62043DGQ MSOP PowerPad package?
The TPS62043DGQ DGQ package requires the exposed PowerPAD to be soldered to a PCB ground plane with ≥4 thermal vias (0.3 mm diameter) for effective heat transfer. Without proper grounding, RθJA degrades from 60°C/W to >100°C/W, risking thermal shutdown at full 1.2 A load in 70°C ambient.
Can the TPS62043DGQ replace the TPS62042DGQ or TPS62044DGQ in an existing design?
No - the TPS62043DGQ is not a drop-in replacement for TPS62042DGQ (1.5 V) or TPS62044DGQ (1.8 V), as output voltage is laser-trimmed per variant. Swapping requires verification of downstream IC voltage tolerances and may necessitate layout changes if feedback compensation was used in adjustable versions.
TPS62043DGQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.6V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
TPS62043DGQ FAQ
1.How can I place an order for TPS62043DGQ through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62043DGQ 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 TPS62043DGQ reliable?
The price and inventory of TPS62043DGQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62043DGQ is usually 5 days.
3.What payment methods are accepted for TPS62043DGQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62043DGQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62043DGQ?
TPS62043DGQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62043DGQ 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 TPS62043DGQ?
For technical support, including TPS62043DGQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62043DGQ requirements.
6.How does Aetrix verify that TPS62043DGQ is sourced from the original manufacturer or authorized distributors?
All TPS62043DGQ 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 TPS62043DGQ meets industry standards.
7.What is the process for return or replacement of TPS62043DGQ?
All TPS62043DGQ units undergo pre-shipment inspection (PSI). If there is an issue with TPS62043DGQ, 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 TPS62043DGQ part is unused and in its original packaging.
Return procedure for TPS62043DGQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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