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Texas Instruments TPS62021DGQR
- Part No.:
- TPS62021DGQR
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62021DGQR.pdf
- Description:
- IC REG BUCK ADJ 600MA 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
TPS62021DGQR from Texas Instruments is a synchronous step-down DC-DC converter optimized for battery-powered portable electronics, delivering up to 600 mA output current with 1.25 MHz fixed switching frequency, 2.5 V to 6.0 V input range, and adjustable 0.7 V to VIN output voltage. It features active-low MODE pin control, 18 µA typical quiescent current, and Power Save Mode operation for high efficiency across light-to-heavy loads in PDA, smart phone, and DSP power rails.
For engineers reviewing the TPS62021DGQR datasheet, TPS62021DGQR pinout, TPS62021DGQR application, or TPS62021DGQR equivalent, key selection considerations include its active-low MODE logic, 10-pin MSOP PowerPad™ package, 95% peak efficiency at 600 mA, thermal shutdown at 150°C, and compatibility with ceramic output capacitors as low as 10 µF for compact, low-noise designs.
Technical Context
The TPS62021DGQR employs a voltage-mode controller with input voltage feed-forward, enabling fast line/load transient response and stable regulation using small ceramic capacitors. Its synchronous rectification uses internal P-channel (115 mΩ typ. @ 3.6 V) and N-channel (85 mΩ typ. @ 3.6 V) MOSFETs, supporting 100% duty cycle for ultra-low dropout operation down to VIN – VOUT ≈ 0.2 V at light load.
Power Save Mode dynamically transitions between PWM (1.25 MHz) and PFM (625 kHz typ.) based on average inductor current, maintaining ≥85% efficiency from 10 mA to 600 mA. Dynamic voltage positioning sets output thresholds at ±0.8%/±1.6% of nominal VOUT, reducing transient undershoot/overshoot without requiring large bulk capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 600 mA max - supports single-core DSPs and low-voltage processors without external current boosting |
| Input voltage range | 2.5 V to 6.0 V - compatible with single Li-ion (2.7–4.2 V), 3×NiMH (3.6 V), or 5 V USB bus inputs |
| Switching frequency | 1.25 MHz fixed (PWM) / 625 kHz (PFM) - enables use of ≤10 µH inductors and avoids AM radio band interference |
| Quiescent current | 18 µA typ. - extends battery life in always-on standby modes of portable devices |
| Feedback reference | 0.5 V - allows precise output setting from 0.7 V upward using high-impedance resistor dividers (≤1 MΩ) |
| Efficiency peak | 95% @ 600 mA, VIN=3.6 V, VOUT=1.8 V - minimizes thermal dissipation in space-constrained handheld PCBs |
| Thermal shutdown | 150°C junction - protects against sustained overload or poor heatsinking in sealed enclosures |
Pinout & Package
TPS62021DGQR is housed in a 10-pin MSOP PowerPad™ package (3.0 mm × 3.0 mm × 1.0 mm), where the exposed thermal pad must be soldered to a dedicated GND plane for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic: tie to VIN to enable, GND to shut down (0.1 µA ISD) |
| 2,3 - VIN | Power input | Dual input pins reduce trace resistance and improve high-frequency decoupling for 600 mA switching current |
| 4 - GND | Analog ground | Reference for FB and control circuitry; separate from PGND to minimize noise coupling into feedback path |
| 5 - FB | Feedback input | Connects to resistor divider; 0.5 V reference enables accurate adjustable outputs with <±3% tolerance |
| 6 - MODE | Mode control | Active-low: pull low for automatic PWM/PFM transition, pull high for forced PWM-only operation |
| 7,8 - SW | Switch node | Drain connection of internal P/N-MOSFETs; requires minimal loop area to suppress EMI and voltage spikes |
| 9,10 - PGND | Power ground | High-current return path for inductor and MOSFETs; must connect directly to PowerPad and input/output caps |
Key Features
| Feature | Design Value |
|---|---|
| Power Save Mode with dynamic voltage positioning | Maintains ≥85% efficiency from 10 mA to 600 mA while limiting output ripple to ±1% during transients |
| 100% duty cycle low-dropout operation | Extends usable battery life by regulating down to VIN – VOUT ≈ 0.2 V, critical for Li-ion discharge tail-end |
| Internal softstart | Gradually ramps switch current (ILIM/8 → ILIM/4 → ILIM/2 → 1.1 A) to prevent input voltage sag on weak sources |
| Synchronous rectification | Eliminates external Schottky diode; reduces conduction loss and improves efficiency vs. asynchronous buck |
| Short-circuit and thermal protection | Auto-recovery shutdown at 150°C junction temp; limits fault current to 0.9–1.3 A to protect inductor and PCB traces |
Applications
| PDA & Smart Phone Core Rail | USB-Powered Modem Power Supply |
|---|---|
|
Use Scenario: Powering ARM9-based application processors (e.g., OMAP-L137) requiring 1.2 V @ 500 mA from a single Li-ion cell. IC Role / Device Role / Timing Role: Primary step-down regulator delivering tightly regulated core voltage with fast load transient response (<10 µs recovery). Use Value: Dynamic voltage positioning ensures <50 mV undershoot during 100 mA → 500 mA load steps, eliminating need for oversized 47 µF output caps. |
Use Scenario: Converting 5 V USB bus to 3.3 V for Ethernet PHY and microcontroller in portable DSL modems. IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator operating continuously at 200–400 mA with low quiescent current during idle periods. Use Value: 18 µA IQ and Power Save Mode extend modem standby time to >72 hours on USB bus power alone. |
| Notebook Subsystem Voltage Scaling | xDSL Line Card DC-DC Conversion |
|
Use Scenario: Generating 1.8 V for DDR SDRAM interface in subnotebook memory subsystems powered by 3-cell NiMH. IC Role / Device Role / Timing Role: Low-noise, high-PSRR point-of-load regulator synchronized to system clock to avoid beat frequencies. Use Value: 1.25 MHz fixed frequency enables deterministic EMI filtering; ceramic 10 µF output cap meets JEDEC DDR timing specs. |
Use Scenario: Providing isolated 1.2 V bias for ADSL2+ line drivers in residential gateways with strict RF emission limits. IC Role / Device Role / Timing Role: Noise-sensitive analog supply rail requiring minimal conducted emissions in 1–30 MHz band. Use Value: Forced PWM mode (MODE = high) eliminates PFM frequency variation, simplifying compliance with FCC Part 15 Class B limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62020DGQR | Active-high MODE pin; otherwise identical electrical specs and pinout | Requires inverted logic drive on MODE signal; unsuitable for systems with open-drain MODE control tied to GND | Select TPS62020DGQR only when existing firmware/hardware expects active-high MODE assertion |
| TPS62040DRCR | Higher 2-MHz switching frequency, 1.2 A output, QFN-10 (3×3 mm) package, different pinout | Enables smaller 4.7 µH inductors but requires PCB redesign; not drop-in due to SW/PGND/GND pin reordering | Choose TPS62040DRCR for new designs needing higher current or smaller solution size-avoid for TPS62021DGQR replacement |
Compared with TPS62021DGQR, TPS62020DGQR offers identical performance but demands active-high MODE signaling, while TPS62040DRCR delivers higher current and frequency at the cost of non-compatible layout and thermal profile-neither is pin-compatible, and both require schematic and layout revision.
Availability
TPS62021DGQR is available at Aetrix Electronics and suitable for PDA power management, USB modem subsystems, notebook memory rails, and xDSL line card designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS62021DGQR 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 high-efficiency DC-DC conversion for portable and industrial applications.
The TPS6202x family was designed specifically for battery-powered portable electronics requiring high light-load efficiency, small solution size, and robust transient response-targeting PDAs, smart phones, and subnotebooks circa 2003–2006.
FAQ
What is the function of the MODE pin on the TPS62021DGQR?
The MODE pin on the TPS62021DGQR is active-low: pulling it low enables automatic transition between PWM (at medium/heavy load) and Power Save Mode (PFM at light load), while pulling it high forces continuous fixed-frequency PWM operation. This dual-mode capability allows system designers to prioritize either efficiency (MODE = low) or EMI predictability (MODE = high) without changing hardware. The TPS62021DGQR's active-low logic distinguishes it from the TPS62020DGQR, which uses active-high MODE control.
Does the TPS62021DGQR support 100% duty cycle operation, and under what conditions?
Yes, the TPS62021DGQR supports 100% duty cycle operation to maintain regulation when input voltage approaches output voltage-critical for maximizing battery runtime in Li-ion applications. This occurs automatically when VIN ≤ VOUT + (IOUT × rDS(on)) + (IOUT × RL), where rDS(on) is the P-channel MOSFET on-resistance (115 mΩ typ.) and RL is inductor DCR. During 100% duty cycle, the P-channel switch remains continuously on, eliminating switching losses and enabling dropout as low as ~0.2 V at 100 mA.
What are the minimum recommended input and output capacitors for stable operation of the TPS62021DGQR?
The TPS62021DGQR requires a minimum 10 µF ceramic input capacitor (X5R/X7R, 0805 or larger) placed adjacent to VIN and PGND pins to suppress high-frequency switching noise. For output, a 10 µF ceramic capacitor (X5R/X7R, 1206 or larger) is sufficient for most applications; 22 µF improves transient response. Both capacitors must have low ESR (<10 mΩ) and rated voltage ≥1.5× nominal VOUT. Tantalum alternatives are acceptable but increase ESR-related ripple and require derating for surge current.
How does the TPS62021DGQR achieve high efficiency at light load currents?
The TPS62021DGQR achieves ≥85% efficiency at 10 mA load via Power Save Mode, which reduces switching frequency from 1.25 MHz to ~625 kHz and dynamically adjusts pulse width to deliver just enough energy to sustain output voltage. Unlike burst-mode converters, it maintains controlled PFM operation with comparator thresholds set at ±0.8%/±1.6% of VOUT, minimizing output ripple to ±1% and avoiding audible noise. This architecture eliminates discontinuous conduction mode losses while preserving fast transient recovery.
Is the TPS62021DGQR pin-compatible with other devices in the TPS6202x family?
Yes, the TPS62021DGQR shares identical pinout and package (10-pin MSOP PowerPad™) with TPS62020DGQR and TPS62026DGQR, enabling direct PCB footprint reuse. However, functional differences exist: TPS62020DGQR has active-high MODE, TPS62026DGQR is fixed 3.3 V output, and only TPS62021DGQR combines adjustable output with active-low MODE. No changes to layout or passive components are needed when substituting within the same DGQ package variant.
TPS62021DGQR 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:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.7V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 600mA
- 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
TPS62021DGQR FAQ
1.How can I place an order for TPS62021DGQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62021DGQR 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 TPS62021DGQR reliable?
The price and inventory of TPS62021DGQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62021DGQR is usually 5 days.
3.What payment methods are accepted for TPS62021DGQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62021DGQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62021DGQR?
TPS62021DGQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62021DGQR 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 TPS62021DGQR?
For technical support, including TPS62021DGQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62021DGQR requirements.
6.How does Aetrix verify that TPS62021DGQR is sourced from the original manufacturer or authorized distributors?
All TPS62021DGQR 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 TPS62021DGQR meets industry standards.
7.What is the process for return or replacement of TPS62021DGQR?
All TPS62021DGQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62021DGQR, 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 TPS62021DGQR part is unused and in its original packaging.
Return procedure for TPS62021DGQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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