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Texas Instruments TPS62420DRCT
- Part No.:
- TPS62420DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS62420DRCT.pdf
- Description:
- IC REG BCK ADJ 0.6A/1A DL 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,810
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Product details
Overview
TPS62420DRCT from Texas Instruments is a synchronous dual step-down DC–DC converter IC with two independent output rails (1.5 V @ 600 mA and 1.8 V @ 1000 mA), operating from 2.5 V to 6 V input, featuring 2.25-MHz fixed-frequency PWM, power-save mode, and EasyScale™ one-pin serial interface for dynamic voltage scaling - used in OMAP™/DSP core and I/O supply sequencing in portable media players and smartphones.
For engineers reviewing the TPS62420DRCT datasheet, TPS62420DRCT pinout, TPS62420DRCT application, or TPS62420DRCT equivalent, key selection considerations include verified dual-output current capability (600 mA / 1000 mA), 10-pin VSON (3 mm × 3 mm) package thermal performance (RθJA = 45.9°C/W), ±1% output voltage accuracy in PWM mode, and confirmed 180° out-of-phase operation to reduce input ripple.
Technical Context
The TPS62420DRCT integrates two fully synchronous buck converters sharing a single 2.25-MHz oscillator with 180° phase shift between SW1 and SW2, enabling reduced input RMS current and smaller input capacitor requirements. Each channel features independent enable (EN1/EN2), analog feedback (FB1) or adjustable reference (DEF_1 for OUT1, ADJ2 for OUT2), and integrated P/N-MOSFETs with RDS(ON) of 280 mΩ (P) and 200 mΩ (N) at 3.6 V.
It supports three operational modes: automatic power-save (PFM at light load, PWM at heavy load), forced PWM (via MODE/DATA = HIGH), and shutdown (ISD = 1.2 μA). Dynamic voltage positioning adjusts VOUT ±1% during transients, and undervoltage lockout triggers at 1.5 V (rising) to protect battery discharge.
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 1 (VOUT1) | Adjustable 0.6 V to VIN (typ. 1.5 V @ 600 mA) - set via external resistor network on DEF_1 pin; FB1 directly connected to VOUT1 for precision regulation. |
| Output 2 (VOUT2) | Adjustable 0.6 V to VIN (typ. 1.8 V @ 1000 mA) - set via external resistor divider + 33 pF feed-forward cap on ADJ2 pin. |
| Switching Frequency | 2.25 MHz (±12.5%) - enables use of 2.2 μH inductors and 22 μF ceramic output capacitors for compact layout. |
| Efficiency | Up to 95% at 3.6 VIN, 1.5 V/1.8 VOUT - achieved via synchronous rectification and low RDS(ON) MOSFETs. |
| Quiescent Current | 32 μA (both converters, PFM mode, IOUT = 0 mA) - extends battery runtime in standby states. |
| Accuracy | ±1% in PWM mode - ensures stable core voltage for DSPs and application processors under varying load and temperature (–40°C to 85°C). |
Pinout & Package
TPS62420DRCT is housed in a thermally enhanced 10-pin VSON package (3.00 mm × 3.00 mm, 0.5 mm pitch) with exposed PowerPAD™ for low thermal resistance (RθJC(bot) = 2.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADJ2 (Pin 1) | Converter 2 output voltage programming input | Analog adjust node: connect external resistor divider (VOUT2 → ADJ2 → GND) to set output between 0.6 V and VIN; must tie directly to VOUT2 if using EasyScale™. |
| MODE/DATA (Pin 2) | Multi-function control terminal | Configures PFM/PWM mode (LOW = auto-switching, HIGH = forced PWM) and serves as open-drain serial data line for EasyScale™ voltage updates. |
| VIN (Pin 3) | Main power input | Supplies both converters; accepts 2.5–6 V with internal UVLO (1.5 V rising threshold) to prevent brownout operation. |
| FB1 (Pin 4) | Converter 1 feedback sense | Direct connection to VOUT1 required; internal error amplifier compares this to 600 mV reference for closed-loop regulation. |
| DEF_1 (Pin 5) | Converter 1 default voltage select | Analog input in TPS62420: external resistor network sets nominal VOUT1 (e.g., 1.5 V); not digital-select like TPS62421. |
| SW1 (Pin 6) | Converter 1 high-side switch node | Connects to inductor L1; switches at 2.25 MHz; requires low-ESR ceramic capacitor (≥10 μF) at VIN for stability. |
| EN1 (Pin 7) | Converter 1 enable control | Active-high logic: drives high to start soft-start ramp (750 μs to 95% VOUT); floating prohibited - must be tied to GND or VIN. |
| GND (Pin 8) | Power and signal ground | Common return for both converters; must be low-impedance connection to PowerPAD™ for thermal and EMI performance. |
| EN2 (Pin 9) | Converter 2 enable control | Independent active-high enable; allows staggered startup or selective shutdown of second rail (e.g., I/O vs core). |
| SW2 (Pin 10) | Converter 2 high-side switch node | 180° out-of-phase with SW1 - reduces input current ripple amplitude by ~30% versus in-phase operation. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase switching | Reduces input RMS current by up to 40%, allowing smaller input bulk capacitor (e.g., single 10 μF X5R instead of dual 4.7 μF). |
| Dynamic voltage positioning | Maintains VOUT 1% above nominal in PFM mode, minimizing undershoot during load steps - critical for DSP core voltage stability. |
| EasyScale™ one-pin interface | Enables real-time VOUT1/VOUT2 adjustment without additional GPIOs or I²C lines; ACK pulse confirms register write success. |
| 100% duty-cycle low-dropout mode | Supports VOUT close to VIN (e.g., 3.3 V out from 3.6 V input) with minimal dropout - extends usable battery range in Li-ion systems. |
| Integrated thermal shutdown | Triggers at 150°C junction temperature with 20°C hysteresis; disables both converters until safe cooldown - protects PCB and load. |
Applications
| Smartphone Application Processor Core Supply | Portable Media Player I/O Rail |
|---|---|
|
Use Scenario: Powers ARM Cortex-A8 core (OMAP™) requiring tightly regulated 1.5 V @ ≤600 mA with fast transient response during CPU frequency scaling. IC Role / Device Role / Timing Role: Dual-rail buck converter delivering core voltage (OUT1) and memory I/O voltage (OUT2) with synchronized 180° switching to minimize noise coupling into RF sections. Use Value: ±1% PWM accuracy and dynamic voltage positioning ensure <10 mV droop during 0→300 mA load step - avoids processor reset or cache corruption. |
Use Scenario: Supplies NAND flash interface and audio codec in handheld media player with battery input ranging from 4.2 V (full) to 3.0 V (low). IC Role / Device Role / Timing Role: Primary DC–DC regulator generating 1.8 V @ 1000 mA for high-speed data buses while maintaining 2.25-MHz switching for predictable EMI filtering. Use Value: 95% peak efficiency at 3.6 VIN/1.8 VOUT extends playback time by >12% versus discrete solutions; 10-pin VSON enables <25 mm² total solution size. |
| DSP-Based Wireless Handset Baseband | Low-Power PDA System-on-Chip Supply |
|
Use Scenario: Provides dual supplies for TI C64x+ DSP: 1.2 V core and 3.3 V I/O, with dynamic voltage scaling enabled via EasyScale™ during sleep/wake transitions. IC Role / Device Role / Timing Role: Synchronous dual buck with independent EN1/EN2 pins enables precise sequencing - core powers before I/O, shutdown reverses order. Use Value: MODE/DATA pin toggling allows seamless transition from 1.2 V/3.3 V (active) to 1.0 V/1.8 V (idle) without firmware overhead or external controllers. |
Use Scenario: Powers Intel PXA270 SoC in enterprise PDA where space-constrained PCB demands minimal passive count and thermal footprint. IC Role / Device Role / Timing Role: Compact dual-output regulator replacing two discrete buck ICs; PowerPAD™ and RθJA = 45.9°C/W allow full 1000 mA load without heatsink. Use Value: 32 μA quiescent current in PFM mode cuts standby power by 65% versus fixed-frequency alternatives - extends weeks-long battery shelf life. |
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 |
|---|---|---|---|
| TPS62421DRCT | Fixed default outputs: 1.2 V/1.8 V (OUT1) and 1.8 V (OUT2); DEF_1 acts as digital select pin, not analog adjust. | Suitable when fixed voltages suffice and no external resistor networks are desired; lacks TPS62420's full 0.6–VIN adjustability on OUT1. | Select TPS62421DRCT only if system requires factory-set voltages without field programmability - no external resistors needed for basic operation. |
| TPS62290DRCT | Single-output 600 mA buck; same 2.25-MHz frequency, 3×3 mm VSON package, and EasyScale™ interface - but no second rail or 180° phasing. | Applicable only when one regulated rail suffices; cannot replace dual-rail functionality without adding second IC and increasing BOM cost/area. | Choose TPS62290DRCT only for simplified designs needing one adjustable output - avoid for true dual-rail systems where TPS62420DRCT provides integration and input ripple reduction. |
Compared with TPS62421DRCT, the TPS62420DRCT offers full analog adjustability on both outputs but requires external resistor networks; versus TPS62290DRCT, it delivers verified dual-rail operation with 180° phasing - eliminating need for second IC and reducing input capacitor size by 30%.
Availability
TPS62420DRCT is available at Aetrix Electronics and suitable for smartphone baseband power, portable media player SoC supplies, and OMAP™ DSP core/I/O rail applications requiring stable component supply across production lifecycles.
Supply support for TPS62420DRCT 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 over 50 years of innovation in energy-efficient power conversion.
The TPS62420DRCT belongs to TI's high-frequency synchronous buck converter product line, designed specifically for space-constrained, battery-powered portable electronics requiring dual independent rails with dynamic voltage scaling and minimal EMI.
FAQ
What is the maximum output current supported by each channel of the TPS62420DRCT?
The TPS62420DRCT supports up to 600 mA on Output 1 (VOUT1) and up to 1000 mA on Output 2 (VOUT2), as confirmed in the Electrical Characteristics table (ILIMF specification) and Typical Application Schematic. These values are sustained under recommended operating conditions (VIN = 2.5–6 V, TA = –40°C to 85°C) with proper thermal design using the exposed PowerPAD™.
Does the TPS62420DRCT require external resistors to set output voltages?
Yes - the TPS62420DRCT is the adjustable version of the family and requires external resistor networks: a divider from VOUT1 to DEF_1 to GND sets VOUT1 (e.g., 1.5 V), and a divider from VOUT2 to ADJ2 to GND plus a 33 pF feed-forward capacitor sets VOUT2 (e.g., 1.8 V). This differs from the fixed-output TPS62421DRCT, which uses internal dividers.
How does the MODE/DATA pin function in the TPS62420DRCT?
The MODE/DATA pin on the TPS62420DRCT serves two confirmed roles: (1) logic-level mode selection (LOW = automatic PFM/PWM switching, HIGH = forced PWM), and (2) open-drain serial data line for EasyScale™ voltage updates. When used for communication, it outputs an acknowledge pulse (400–520 μs duration) after valid command reception - a feature verified in the Interface Timing table.
What thermal performance can be expected from the TPS62420DRCT in a standard PCB layout?
In a standard 2-layer PCB with 1-in² 2-oz copper thermal pad connected to the PowerPAD™, the TPS62420DRCT achieves RθJA = 45.9°C/W (per datasheet Section 7.4). At full 1000 mA load on OUT2 with 3.6 VIN/1.8 VOUT, power dissipation is ~180 mW, resulting in ~8.3°C junction-to-ambient rise - well within the 125°C max operating junction temperature limit.
Is the TPS62420DRCT compatible with ceramic output capacitors?
Yes - the TPS62420DRCT is explicitly designed for ceramic output capacitors, as confirmed in the Typical Application Schematic (22 µF X5R on each output) and Feature Description ("allows use of small inductors and capacitors"). Its internal compensation is optimized for 20–47 µF ceramic caps with ≤5 mΩ ESR; tantalum or electrolytic types are not required or recommended.
TPS62420DRCT 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS62420DRCT FAQ
1.How can I place an order for TPS62420DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62420DRCT 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 TPS62420DRCT reliable?
The price and inventory of TPS62420DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62420DRCT is usually 5 days.
3.What payment methods are accepted for TPS62420DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62420DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62420DRCT?
TPS62420DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62420DRCT 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 TPS62420DRCT?
For technical support, including TPS62420DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62420DRCT requirements.
6.How does Aetrix verify that TPS62420DRCT is sourced from the original manufacturer or authorized distributors?
All TPS62420DRCT 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 TPS62420DRCT meets industry standards.
7.What is the process for return or replacement of TPS62420DRCT?
All TPS62420DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62420DRCT, 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 TPS62420DRCT part is unused and in its original packaging.
Return procedure for TPS62420DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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