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Texas Instruments TPS62420QDRCRQ1
- Part No.:
- TPS62420QDRCRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS62420QDRCRQ1.pdf
- Description:
- IC REG BCK ADJ 0.6A/1A DL 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,669
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Product details
Overview
TPS62420QDRCRQ1 from Texas Instruments is an AEC-Q100 qualified automotive dual synchronous step-down DC-DC converter delivering 600 mA on Channel 1 and 1000 mA on Channel 2, operating from 2.5 V to 6 V input with fixed 2.25-MHz switching frequency and ±1% output voltage accuracy in PWM mode. It supports dynamic voltage scaling via EasyScale™ one-wire interface and powers dual-rail systems in ADAS camera modules, infotainment SoCs, and automotive microcontrollers.
For engineers reviewing the TPS62420QDRCRQ1 datasheet, TPS62420QDRCRQ1 pinout, TPS62420QDRCRQ1 application, or TPS62420QDRCRQ1 equivalent, key selection criteria include dual-channel current capability (600/1000 mA), 180° out-of-phase operation for reduced input ripple, Power Save Mode quiescent current (32 μA for both converters), and QFN-10 (3×3 mm) thermal-pad package compatibility with automotive PCB layout constraints.
Technical Context
The TPS62420QDRCRQ1 integrates two independent synchronous buck regulators sharing a single 2.25-MHz oscillator with 180° phase shift to minimize input RMS current. Each channel features internal compensation, PFM/PWM auto-transition, and voltage positioning (1.01×VOUT in light-load PFM mode) to improve transient response.
It implements dual current-limit protection (P-MOSFET: 0.85–1.15 A; N-MOSFET: 1.19–1.61 A), undervoltage lockout (1.5–2.35 V), and thermal shutdown (150°C). The MODE/DATA pin serves dual purpose: enabling forced PWM mode (high) or Power Save Mode (low), and acting as open-drain serial interface for real-time output voltage adjustment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5 V to 6 V - supports single-cell Li-ion (2.7–4.2 V) and regulated 3.3 V/5 V rails without external LDO pre-regulation. |
| Output Current | 600 mA (CH1), 1000 mA (CH2) - enables independent power domains for core logic and I/O peripherals in automotive MCUs. |
| Switching Frequency | 2.25 MHz (fixed) - allows use of compact 2.2 μH inductors and ceramic capacitors for space-constrained automotive modules. |
| Output Accuracy | ±1% in PWM mode - ensures stable supply to sensitive analog blocks (e.g., ADC references, PLLs) under full load and temperature range. |
| Quiescent Current | 32 μA (both converters, PFM mode) - extends battery runtime in always-on vehicle networks (e.g., CAN wake-up circuits). |
| Shutdown Current | 1.2 μA - meets automotive low-power standby requirements for telematics and gateway ECUs. |
| Package | 10-pin QFN (3 mm × 3 mm, DRC) with exposed thermal pad - provides 49°C/W junction-to-ambient thermal resistance for conduction-cooled automotive PCBs. |
Pinout & Package
TPS62420QDRCRQ1 uses a 10-pin leadless QFN package (3 mm × 3 mm, DRC) with exposed thermal pad connected to GND for enhanced thermal performance in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADJ2 | Converter 2 feedback adjust | Analog input for external resistor divider to set VOUT2 (0.6 V to VIN); must be shorted to VOUT2 when using EasyScale™ interface. |
| MODE/DATA | Mode control & serial interface | Open-drain bidirectional pin: low = Power Save Mode, high = forced PWM; also carries EasyScale™ commands for dynamic voltage scaling. |
| VIN | Main power input | Supplies both converters; accepts 2.5–6 V with integrated UVLO (1.5–2.35 V threshold) to prevent brownout operation. |
| FB1 | Converter 1 feedback sense | Direct connection to VOUT1 for precise regulation; internal feed-forward capacitor improves line transient response. |
| DEF_1 | Converter 1 default voltage select | Analog input for external resistor network to program VOUT1; disconnected from error amp in fixed-output variants. |
| SW1, SW2 | Power switch nodes | Connect to external inductors; each integrates P/N-MOSFET pair with current limits (CH1: 0.85–1.15 A, CH2: 1.19–1.61 A). |
| EN1, EN2 | Independent enable inputs | Active-high digital controls; allow staggered startup and selective channel shutdown for power sequencing in multi-rail systems. |
| GND | Power and signal ground | Shared reference for both converters; must be tied to exposed thermal pad for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase operation | Reduces input capacitor RMS current by ~30%, enabling smaller 10-μF input ceramic capacitors instead of bulk electrolytics. |
| Dynamic Voltage Scaling (EasyScale™) | One-wire serial interface adjusts both outputs on-the-fly-supports DVFS in automotive DSPs and low-power domain transitions without firmware overhead. |
| Voltage positioning in PFM mode | Maintains VOUT at 1.01× nominal during light loads, reducing undershoot by up to 50 mV during sudden load steps (e.g., radar pulse activation). |
| 100% duty cycle low-dropout mode | Enables regulation down to VIN − VOUT ≈ 100 mV at light loads, maximizing usable battery capacity in 12-V automotive systems with buck-boost front-end. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction temperature-validated for engine bay, head unit, and ADAS sensor applications per automotive reliability standards. |
Applications
| ADAS Camera Module Power | Automotive Infotainment SoC |
|---|---|
Use Scenario: Dual-rail power for image sensor (1.2 V) and ISP (1.8 V) in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Primary dual-output PMIC providing sequenced, low-noise supplies with fast transient response to handle burst-mode imaging. Use Value: 180° phase shift cuts input ripple by 40%, reducing EMI filter size; 32-μA quiescent current extends parking-mode battery life. | Use Scenario: Independent core (1.1 V) and I/O (3.3 V) rails for quad-core automotive infotainment processors. IC Role / Device Role / Timing Role: Synchronous buck controller supporting DVFS via EasyScale™ to match CPU workload and reduce thermal throttling. Use Value: Dynamic voltage adjustment reduces average power by 18% during video decode; ±1% accuracy prevents SoC reset during voltage transitions. |
| Body Control Module MCU | Automotive Gateway ECU |
Use Scenario: Powering 32-bit ARM-based MCU (1.5 V core, 3.3 V I/O) and CAN transceiver (5 V derived externally) in door module or lighting ECU. IC Role / Device Role / Timing Role: Dual-channel regulator with independent EN pins enabling controlled power-up sequence and deep-sleep wake-up isolation. Use Value: 1.2-μA shutdown current meets ISO 16750-2 sleep current requirements; 100% duty cycle extends operation down to 2.7 V battery voltage. | Use Scenario: Supplying 1.2 V for Ethernet PHY and 1.8 V for security MCU in vehicle gateway handling CAN-FD, LIN, and Ethernet traffic. IC Role / Device Role / Timing Role: Low-noise, high-efficiency dual rail source with thermal shutdown (150°C) for convection-cooled gateway housings. Use Value: 49°C/W thermal resistance maintains <110°C junction temp at 85°C ambient; PFM-to-PWM transition <520 μs ensures clean boot after CAN wake event. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62400QDRCRQ1 | Same pinout and package; lower output currents (400 mA/600 mA); no EasyScale™ interface; fixed 1.2 V/1.8 V outputs only. | Suitable for cost-sensitive, fixed-voltage automotive sensors where dynamic scaling is unnecessary. | Select when dual-rail sequencing is needed but output flexibility and higher current are not required. |
| LM63460-Q1 | Single-channel 3.5-A buck; requires two ICs for dual rail; 2.1-MHz switching; no integrated PFM/PWM auto-transition. | Used where higher per-channel current or external loop compensation is mandatory; lacks integrated dual-channel coordination. | Choose only if >1 A per rail is required or if discrete control over each regulator's loop dynamics is essential. |
Compared with TPS62420QDRCRQ1, TPS62400QDRCRQ1 offers identical footprint and thermal performance but sacrifices current headroom and programmability, while LM63460-Q1 delivers higher single-rail current at the cost of board area, BOM count, and loss of synchronized phase control.
Availability
TPS62420QDRCRQ1 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power delivery, and body control module MCU applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS62420QDRCRQ1 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 automotive-grade power management solutions with over 40 years of automotive qualification experience.
The TPS624xx-Q1 product line delivers highly integrated dual-output DC-DC converters optimized for AEC-Q100 Grade 1 automotive subsystems requiring compact size, low EMI, and robust transient response in safety-critical environments.
FAQ
What is the maximum output current capability of each channel in TPS62420QDRCRQ1?
TPS62420QDRCRQ1 delivers up to 600 mA on Channel 1 (VOUT1) and up to 1000 mA on Channel 2 (VOUT2), as confirmed by electrical characteristics tables and thermal derating curves in the SLVSA56 datasheet. These values are specified across the full −40°C to +125°C junction temperature range with appropriate PCB copper area and thermal pad soldering. Exceeding these currents risks thermal shutdown activation or reduced output voltage accuracy.
Does TPS62420QDRCRQ1 support dynamic voltage scaling, and how is it implemented?
Yes, TPS62420QDRCRQ1 supports dynamic voltage scaling via its EasyScale™ one-wire serial interface on the MODE/DATA pin. This interface allows real-time adjustment of both output voltages during operation without external DACs or firmware interrupts. The protocol uses open-drain signaling with acknowledge pulses, and requires no additional pins-enabling DVFS in automotive DSPs and application processors while maintaining AEC-Q100 compliance.
What is the purpose of the DEF_1 pin in TPS62420QDRCRQ1, and how is it used?
The DEF_1 pin in TPS62420QDRCRQ1 serves as an analog input to set the default output voltage of Converter 1 (VOUT1) using an external resistor divider. When configured this way, VOUT1 can be adjusted from 0.6 V to VIN. If EasyScale™ is used instead, DEF_1 connects to an internal register bank and is not externally biased. Its function is distinct from ADJ2, which serves the same role for Converter 2 but supports different external component requirements (e.g., 33-pF feedforward capacitor).
How does Power Save Mode operate in TPS62420QDRCRQ1, and what is its quiescent current?
Power Save Mode in TPS62420QDRCRQ1 activates automatically when the MODE/DATA pin is pulled low, causing each converter to transition independently between PWM and PFM based on load. In PFM mode, the device achieves 32 μA typical quiescent current with both channels active-verified across −40°C to +125°C. This mode uses voltage positioning (1.01×VOUT) and skip-compare thresholds to maintain tight regulation while minimizing switching losses at light loads.
Is TPS62420QDRCRQ1 pin-compatible with any other TI dual-buck converters?
TPS62420QDRCRQ1 shares the same 10-pin QFN (DRC) package and pinout with TPS62400QDRCRQ1 and TPS62410QDRCRQ1, enabling drop-in replacement in fixed-output or lower-current designs. However, functional differences exist: TPS62400QDRCRQ1 lacks EasyScale™ and delivers only 400 mA/600 mA, while TPS62410QDRCRQ1 supports 600 mA/600 mA with adjustable outputs. Pin compatibility does not guarantee identical register maps or timing behavior.
TPS62420QDRCRQ1 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:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 600mA, 1A
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS62420QDRCRQ1 FAQ
1.How can I place an order for TPS62420QDRCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62420QDRCRQ1 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 TPS62420QDRCRQ1 reliable?
The price and inventory of TPS62420QDRCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62420QDRCRQ1 is usually 5 days.
3.What payment methods are accepted for TPS62420QDRCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62420QDRCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62420QDRCRQ1?
TPS62420QDRCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62420QDRCRQ1 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 TPS62420QDRCRQ1?
For technical support, including TPS62420QDRCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62420QDRCRQ1 requirements.
6.How does Aetrix verify that TPS62420QDRCRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS62420QDRCRQ1 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 TPS62420QDRCRQ1 meets industry standards.
7.What is the process for return or replacement of TPS62420QDRCRQ1?
All TPS62420QDRCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62420QDRCRQ1, 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 TPS62420QDRCRQ1 part is unused and in its original packaging.
Return procedure for TPS62420QDRCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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