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Texas Instruments TPS62042DGQR
- Part No.:
- TPS62042DGQR
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62042DGQR.pdf
- Description:
- IC REG BUCK 1.5V 1.2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,647
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Product details
Overview
TPS62042DGQR from Texas Instruments is a 1.2-A, 1.25-MHz synchronous step-down DC-DC converter in a 10-pin MSOP PowerPad™ package, delivering fixed 1.5-V output from 2.5–6.0-V input. It features 95% peak efficiency, 18-µA quiescent current, power save mode for light-load operation, and thermal shutdown protection. It powers low-voltage DSPs and processors in battery-powered PDAs and smart phones.
For engineers reviewing the TPS62042DGQR datasheet, TPS62042DGQR pinout, TPS62042DGQR application, or TPS62042DGQR equivalent, key selection criteria include its fixed 1.5-V output, 1.25-MHz switching frequency, MSOP PowerPad thermal performance, and compatibility with single Li-Ion or triple NiMH/NiCd battery inputs.
Technical Context
The TPS62042DGQR uses voltage-mode control with input voltage feed-forward to achieve tight line and load regulation. Its synchronous rectification employs internal P-channel (115 mΩ typical) and N-channel (85 mΩ typical) MOSFETs, enabling high efficiency across 0–1.2-A load range.
It operates in PWM mode at medium-to-heavy loads and transitions to PFM-based power save mode below ~10 mA average inductor current. The MODE pin forces fixed-frequency PWM operation, while EN enables/disables the device with 0.1-µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±3% over full load and temperature range |
| Max Output Current | 1.2 A continuous; supports transient peaks up to 1.85 A current limit |
| Input Voltage Range | 2.5 V to 6.0 V - compatible with single Li-Ion (2.7–4.2 V) and 3-cell NiMH (3.6 V nominal) |
| Switching Frequency | 1.25 MHz nominal (1–1.5 MHz range); enables compact 6.2-µH inductor and 22-µF ceramic capacitors |
| Quiescent Current | 18 µA typical in active operation; 0.1 µA in shutdown - extends battery life in standby |
| Efficiency Peak | Up to 95% at 600 mA, 3.6-V input, 1.8-V output - verified per SLVS463B Figure 2 |
| Thermal Protection | Thermal shutdown at 150°C junction temperature; resumes operation after cooldown |
Pinout & Package
TPS62042DGQR is housed in a thermally enhanced 10-pin MSOP PowerPad™ package (DGQ), requiring the exposed pad to be soldered to PCB ground for optimal thermal performance (RθJA = 60°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic; must be terminated - floating causes undefined behavior; pulls device into 0.1-µA shutdown when low |
| VIN (Pins 2,3) | Power input | Accepts 2.5–6.0 V; dual pins reduce IR drop and improve thermal path to PowerPad |
| GND (Pin 4) | Analog ground | Reference for FB and MODE; separate from PGND to minimize noise coupling into feedback loop |
| FB (Pin 5) | Feedback input | Internally tied to 1.5-V output - no external resistor divider required for fixed-output version |
| MODE (Pin 6) | Operating mode select | Pull low for automatic PWM/PFM; pull high for forced fixed-frequency PWM - critical for EMI-sensitive designs |
| SW (Pins 7,8) | Switch node | Drain connection of internal P- and N-channel MOSFETs; requires minimal trace area to reduce EMI |
| PGND (Pins 9,10) | Power ground | High-current return path for SW and VIN; must connect directly to PowerPad for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Voltage Positioning | Maintains output 0.8% above nominal at light load, reducing voltage droop during 0→1.2-A transients without large output caps |
| 100% Duty Cycle Operation | Enables regulation down to VIN − VOUT ≈ IOUT × rDS(on), extending usable battery range in Li-Ion systems |
| Internal Softstart | Digital softstart limits inrush current via stepped switch current (ILIM/8 → ILIM/4 → ILIM/2 → full ILIM), preventing input rail collapse |
| Short-Circuit Protection | Reduces switching frequency and current limit to 50% when VOUT < 50% of nominal - active during startup and fault conditions |
| PowerPAD Thermal Interface | Exposed copper pad (1.52 × 1.79 mm) soldered to PCB ground plane lowers junction-to-board thermal resistance significantly |
Applications
| Smartphone Baseband Power | PDA Application Processor Supply |
|---|---|
Use Scenario: Powers ARM9/ARM11 application processors in handheld devices powered by single-cell Li-Ion batteries. IC Role / Device Role / Timing Role: Primary 1.5-V core supply regulator with dynamic voltage positioning to handle burst-mode CPU loads. Use Value: Delivers 1.2-A peak current with <1% output ripple during 100-ms load steps, eliminating need for >47-µF bulk capacitance. | Use Scenario: Supplies 1.5-V I/O and memory interface rails in portable digital assistants with multi-rail PMIC constraints. IC Role / Device Role / Timing Role: Secondary fixed-output buck converter supporting SDIO, USB PHY, and LCD controller interfaces. Use Value: 18-µA quiescent current and automatic PFM mode extend standby time beyond 72 hours on 800-mAh battery. |
| USB-Powered Modem | xDSL Line Card Bias Supply |
Use Scenario: Generates stable 1.5-V rail from 5-V USB port for embedded LTE/WCDMA modems in portable hotspots. IC Role / Device Role / Timing Role: Isolated point-of-load regulator decoupling modem RF section from noisy USB bus. Use Value: 1.25-MHz fixed frequency allows simple LC filtering to meet FCC Class B conducted EMI limits without shielding. | Use Scenario: Provides 1.5-V bias for analog front-end (AFE) and line driver ICs in ADSL2+ customer premises equipment. IC Role / Device Role / Timing Role: Low-noise, high-PSRR intermediate rail between 3.3-V system supply and sensitive analog circuitry. Use Value: Power save mode maintains >85% efficiency at 5-mA idle current, reducing thermal load in sealed xDSL enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62042DRCR | Same electrical specs; QFN-10 (3×3 mm) package with 48.7°C/W RθJA vs. MSOP's 60°C/W | Better thermal performance at high ambient; requires different PCB footprint and reflow profile | Select DRCR for space-constrained layouts needing lower junction temperature rise under 1.2-A load |
| TPS62062DSGR | Lower 600-mA rating, 3-MHz switching, 1.5-V fixed output; 6-pin WSON package | Higher frequency enables smaller magnetics but reduced max current; no MODE pin or dynamic voltage positioning | Select DSGR only for ultra-low-profile, sub-600-mA applications where size outweighs transient performance |
Compared with TPS62042DGQR, TPS62042DRCR offers superior thermal dissipation in a smaller footprint but demands QFN assembly capability, while TPS62062DSGR trades current capacity and advanced light-load features for miniaturization - neither is pin-compatible, and both require layout revision.
Availability
TPS62042DGQR is available at Aetrix Electronics and suitable for smartphone baseband power, PDA processor supplies, and USB-powered modem designs requiring stable component supply with long-term industrial availability.
Supply support for TPS62042DGQR 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 TPS6204x product line was designed specifically for battery-powered portable electronics, emphasizing ultra-low quiescent current, small solution size, and seamless transition between PWM and PFM modes across the full load range.
FAQ
What is the output voltage tolerance of the TPS62042DGQR over temperature and load?
The TPS62042DGQR delivers a fixed 1.5-V output with ±3% tolerance across the full operating range: −40°C to 85°C ambient temperature and 0–1.2-A load current. This specification is guaranteed per the SLVS463B datasheet Table "OUTPUT" under "VO Fixed output voltage", with line and load regulation digitally controlled to maintain accuracy.
Does the TPS62042DGQR require external feedback resistors?
No, the TPS62042DGQR does not require external feedback resistors. As a fixed-output variant (1.5 V), its FB pin is internally connected to the regulated output. External resistor dividers are only needed for the adjustable TPS62040 version. Connecting resistors to FB on the TPS62042DGQR would disrupt regulation and is not supported.
How does the MODE pin affect efficiency and noise performance of the TPS62042DGQR?
When the MODE pin is pulled low, the TPS62042DGQR enters automatic power save mode, achieving >85% efficiency at 1-mA load via PFM operation. Pulling MODE high forces fixed 1.25-MHz PWM mode, improving EMI filterability but reducing light-load efficiency to ~65% at 1-mA. The choice depends on whether low noise or maximum battery life is prioritized.
What is the recommended inductor value and type for the TPS62042DGQR?
The TPS62042DGQR is optimized for a 6.2-µH shielded power inductor rated for ≥1.85-A saturation current and low DC resistance (e.g., Sumida CDRH5D28-6R2). Inductor selection is validated in SLVS463B Table 1 and Figure 17; deviation outside 4.7–6.2 µH may degrade transient response or efficiency due to altered ripple current and control loop dynamics.
Can the TPS62042DGQR operate with input voltage below 2.5 V?
No, the TPS62042DGQR has a minimum specified input voltage of 2.5 V per the RECOMMENDED OPERATING CONDITIONS table in SLVS463B. Below this, undervoltage lockout (UVLO) activates at ~1.5–2.3 V threshold, disabling switching. Attempting operation below 2.5 V risks unstable regulation, excessive dropout, or failure to start - it is not characterized or guaranteed.
TPS62042DGQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 1.5V
- 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
TPS62042DGQR FAQ
1.How can I place an order for TPS62042DGQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62042DGQR 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 TPS62042DGQR reliable?
The price and inventory of TPS62042DGQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62042DGQR is usually 5 days.
3.What payment methods are accepted for TPS62042DGQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62042DGQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62042DGQR?
TPS62042DGQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62042DGQR 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 TPS62042DGQR?
For technical support, including TPS62042DGQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62042DGQR requirements.
6.How does Aetrix verify that TPS62042DGQR is sourced from the original manufacturer or authorized distributors?
All TPS62042DGQR 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 TPS62042DGQR meets industry standards.
7.What is the process for return or replacement of TPS62042DGQR?
All TPS62042DGQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62042DGQR, 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 TPS62042DGQR part is unused and in its original packaging.
Return procedure for TPS62042DGQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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