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Texas Instruments TPS62042DRCR
- Part No.:
- TPS62042DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS62042DRCR.pdf
- Description:
- IC REG BUCK 1.5V 1.2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:521
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Product details
Overview
TPS62042DRCR from Texas Instruments is a fixed-output 1.5 V, 1.2 A synchronous step-down DC-DC converter in a 10-pin QFN 3×3 mm PowerPAD™ package. It operates from 2.5 V to 6.0 V input, delivers up to 95% efficiency at 1.25 MHz switching frequency, and features power save mode for light-load operation - ideal for Li-ion–powered portable systems requiring stable low-voltage rails.
For engineers reviewing the TPS62042DRCR datasheet, TPS62042DRCR pinout, TPS62042DRCR application, or TPS62042DRCR equivalent, key selection criteria include its fixed 1.5 V output, 18 µA quiescent current, thermal shutdown protection, 100% duty cycle capability for ultra-low dropout, and compatibility with standard 22 µF ceramic input/output capacitors.
Technical Context
The TPS62042DRCR implements a voltage-mode synchronous buck topology with input voltage feed-forward control, enabling fast line/load transient response and stable regulation using small ceramic capacitors. Its internal 0.5 V reference and fixed feedback network set the 1.5 V output without external resistors.
It integrates dual MOSFETs (P-channel high-side switch with 115–210 mΩ RDS(on), N-channel synchronous rectifier with 85–200 mΩ RDS(on)), a 1.25 MHz oscillator, soft-start circuitry, and dynamic voltage positioning - all optimized for battery-powered PDA, smart phone, and notebook subsystems operating across −40°C to 85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±3% over full load and temperature range - eliminates need for external feedback resistors and simplifies layout. |
| Max Output Current | 1.2 A continuous - supports core logic and I/O rails for DSPs, CPUs, and USB peripherals. |
| Input Voltage Range | 2.5 V to 6.0 V - compatible with single-cell Li-ion (2.7–4.2 V), 3-cell NiMH/NiCd (3.6 V), and 5 V USB sources. |
| Switching Frequency | 1.25 MHz (typical) - enables compact 6.2 µH inductor and 22 µF ceramic capacitors; reduces EMI in xDSL and RF-sensitive designs. |
| Quiescent Current | 18 µA (typical) - extends battery life in always-on standby modes without sacrificing startup speed. |
| Efficiency | Up to 95% - achieved via synchronous rectification and low RDS(on) MOSFETs, minimizing thermal stress in space-constrained QFN packages. |
| Duty Cycle Range | 0% to 100% - maintains regulation down to VIN = VOUT + IOUT × RDS(on), maximizing usable battery voltage range. |
Pinout & Package
TPS62042DRCR uses a thermally enhanced 10-pin QFN (3 mm × 3 mm, 0.5 mm pitch) with exposed PowerPAD™ pad soldered to PCB ground for optimal thermal dissipation (RθJA = 48.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high digital control: tie to VIN to enable, GND to shut down (0.1 µA ISD); must not float. |
| VIN (Pins 2,3) | Power input | Primary supply connection for 2.5–6.0 V; dual pins reduce trace resistance and improve current handling. |
| GND (Pin 4) | Analog ground | Reference node for FB and MODE; separate from PGND to minimize noise coupling into feedback path. |
| FB (Pin 5) | Feedback input | Internally connected to 1.5 V divider - no external resistors required; direct connection to output ensures accuracy. |
| MODE (Pin 6) | Operation mode select | Pull low for automatic PWM/PFM power save; pull high for forced fixed-frequency PWM - critical for noise-sensitive analog sections. |
| SW (Pins 7,8) | Switch node | Drain connection of internal P-channel MOSFET and source of N-channel rectifier; high di/dt node requiring minimal loop area. |
| PGND (Pins 9,10) | Power ground | High-current return path for inductor and MOSFETs; tied to PowerPAD™ for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Power Save Mode | Automatic transition to PFM at light loads maintains >85% efficiency down to 1 mA, reducing system standby power. |
| Dynamic Voltage Positioning | Output held 0.8% above nominal during light load, providing headroom to absorb 1.2 A transients with <1% droop using only 22 µF output capacitance. |
| Thermal Shutdown | Activates at 150°C junction temperature and auto-recovers when TJ drops below 150°C - protects against sustained overload or poor heatsinking. |
| Short-Circuit Protection | Reduces switching frequency and current limit to 50% when VOUT < 50% of nominal - prevents damage during output faults or hot-plug events. |
| Internal Softstart | Digital ramp limits inrush current by stepping switch current limit (ILIM/8 → ILIM/4 → ILIM/2 → full 1.85 A), preventing input rail collapse on weak sources. |
Applications
| Smartphone Baseband Core Supply | USB-Powered Modem Rail |
|---|---|
Use Scenario: Powers ARM-based baseband processor core in dual-mode smartphone operating from single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary 1.5 V core regulator delivering up to 1.2 A with fast transient response to handle burst-mode processing loads. Use Value: 100% duty cycle operation extends runtime by utilizing full battery voltage range; 95% peak efficiency minimizes thermal impact in sealed enclosure. | Use Scenario: Generates clean 1.5 V rail for USB 2.0 modem ICs powered directly from host 5 V USB port via integrated LDO bypass. IC Role / Device Role / Timing Role: Step-down converter converting 5 V USB input to regulated 1.5 V for PHY and MAC logic, synchronized to USB frame timing. Use Value: 1.25 MHz fixed frequency avoids interference with USB 480 Mbps signaling; low 18 µA quiescent current meets USB suspend current budget. |
| Notebook Subsystem I/O Supply | xDSL Line Card DSP Bias |
Use Scenario: Supplies 1.5 V to PCIe interface buffers and SATA PHYs in ultraportable notebook with aggressive thermal constraints. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator placed near high-speed interface ICs to minimize IR drop and noise coupling. Use Value: QFN PowerPAD™ package with thermal vias achieves <125°C max junction under 1.2 A load; MODE pin allows forced PWM to suppress switching noise near RF sections. | Use Scenario: Provides stable 1.5 V bias for ADSL2+ line driver DSP in carrier-class DSLAM line card operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: Primary DC-DC converter feeding DSP core, with thermal shutdown and short-circuit protection ensuring field reliability. Use Value: 150°C thermal shutdown threshold and 1.2 A current limit prevent latch-up during line surge events; 2.5–6.0 V input range accommodates upstream 5 V or 3.3 V intermediate bus. |
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 |
|---|---|---|---|
| TPS62040DRCR | Adjustable output (0.7–VIN) via external resistor divider; identical package, pinout, and electrical specs otherwise. | Requires two external resistors and optional noise-filtering capacitors; used where multiple output voltages share same PCB footprint. | Select TPS62040DRCR only if programmable output is needed; TPS62042DRCR saves BOM cost and layout area for fixed 1.5 V. |
| TPS62130ARGTR | Higher 3 A output, 2.7–6.5 V input, 3.5 µA IQ, but larger 16-pin QFN (3×3 mm) and different pinout - not pin-compatible. | Targets higher-power applications like FPGA I/O banks; lacks dynamic voltage positioning and 100% duty cycle mode. | Choose TPS62130ARGTR only when >1.2 A is required; TPS62042DRCR remains optimal for space- and efficiency-critical 1.5 V core rails. |
Compared with TPS62040DRCR, TPS62042DRCR eliminates external feedback components and reduces solution size; compared with TPS62130ARGTR, it offers superior light-load efficiency and smaller footprint at lower current capability - making it the precise fit for 1.5 V/1.2 A portable subsystems.
Availability
TPS62042DRCR is available at Aetrix Electronics and suitable for smartphone baseband supplies, USB-powered modem rails, and notebook I/O subsystems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for TPS62042DRCR 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 - delivering high efficiency, small solution size, and robust protection features across Li-ion and multi-cell battery input ranges.
FAQ
What is the output voltage tolerance of the TPS62042DRCR over temperature and load?
The TPS62042DRCR provides a fixed 1.5 V output with ±3% tolerance across the full operating range: −40°C to 85°C ambient temperature and 0 mA to 1.2 A load current. This specification is guaranteed by internal trimming of the 0.5 V reference and feedback divider, eliminating drift from external resistor tolerances.
Does the TPS62042DRCR require external compensation components?
No, the TPS62042DRCR uses an internally compensated voltage-mode control loop and requires no external compensation components. Its fast-response architecture with input voltage feed-forward ensures stability with standard 22 µF ceramic input and output capacitors and a 6.2 µH inductor - verified across all operating conditions in the datasheet.
How does the MODE pin affect efficiency and noise performance of the TPS62042DRCR?
When the MODE pin is pulled low, the TPS62042DRCR enters automatic power save mode - switching between PWM (1.25 MHz) at medium-to-heavy loads and PFM at light loads to maintain >85% efficiency down to 1 mA. Pulling MODE high forces fixed-frequency PWM operation, which increases light-load noise but simplifies EMI filtering for sensitive analog circuits.
Can the TPS62042DRCR operate with input voltage equal to its 1.5 V output?
Yes, the TPS62042DRCR supports 100% duty cycle operation, allowing it to regulate with VIN as low as VOUT + IOUT × RDS(on). At 1.2 A and typical 115 mΩ high-side RDS(on), it can sustain regulation down to ~1.64 V input - extending usable battery life in single-cell Li-ion applications beyond conventional buck converters.
What thermal design guidance applies to the TPS62042DRCR's QFN PowerPAD™ package?
The TPS62042DRCR's exposed PowerPAD™ must be soldered to a solid PCB ground plane with ≥4 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) connecting to inner or bottom-layer copper pours. This achieves the rated RθJA of 48.7°C/W; omitting vias or insufficient copper area raises junction temperature and may trigger thermal shutdown under 1.2 A continuous load.
TPS62042DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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-VSON (3x3)
TPS62042DRCR FAQ
1.How can I place an order for TPS62042DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62042DRCR 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 TPS62042DRCR reliable?
The price and inventory of TPS62042DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62042DRCR is usually 5 days.
3.What payment methods are accepted for TPS62042DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62042DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62042DRCR?
TPS62042DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62042DRCR 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 TPS62042DRCR?
For technical support, including TPS62042DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62042DRCR requirements.
6.How does Aetrix verify that TPS62042DRCR is sourced from the original manufacturer or authorized distributors?
All TPS62042DRCR 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 TPS62042DRCR meets industry standards.
7.What is the process for return or replacement of TPS62042DRCR?
All TPS62042DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62042DRCR, 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 TPS62042DRCR part is unused and in its original packaging.
Return procedure for TPS62042DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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