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Texas Instruments TPS62303DRCR
- Part No.:
- TPS62303DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS62303DRCR.pdf
- Description:
- IC REG BUCK 1.8V 500MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,401
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Product details
Overview
TPS62303DRCR from Texas Instruments is a 500-mA, 3-MHz synchronous step-down DC-DC converter in a 10-pin QFN (3 × 3 mm) package, delivering fixed 1.8 V output from 2.7–6 V input. It features 93% peak efficiency, 86 µA quiescent current in power-save mode, and 35 ns minimum on-time for ultra-low-duty-cycle operation. Designed for Li-Ion–powered portable electronics, it powers core voltage rails in smartphones and PDAs.
For engineers reviewing the TPS62303DRCR datasheet, TPS62303DRCR pinout, TPS62303DRCR application, or TPS62303DRCR equivalent, key selection criteria include its fixed 1.8 V output, QFN-10 thermal performance (RθJA = 49°C/W), PFM/PWM auto-mode transition, and compatibility with 1 µH inductors and 4.7 µF ceramic output capacitors in space-constrained designs.
Technical Context
The TPS62303DRCR employs a voltage-mode PWM controller with input voltage feed-forward to achieve best-in-class load and line transient response. Its dual MOSFET power stage integrates a P-channel high-side switch (750 mΩ typical rDS(on) at 3.6 V) and N-channel low-side switch (750 mΩ typical), enabling 100% duty cycle for lowest dropout operation.
Operation switches automatically between fixed-frequency 3-MHz PWM (at moderate/heavy loads) and pulse-frequency modulation (PFM) at light loads-reducing quiescent current to 86 µA while maintaining >85% efficiency down to 1 mA. The MODE/SYNC pin supports forced-PWM, external clock synchronization (2.65–3.35 MHz), and seamless on-the-fly mode transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.3% over –40°C to +85°C - enables direct powering of 1.8-V I/O or core rails without external feedback resistors. |
| Max Output Current | 500 mA continuous - supports single-core processors, RF transceivers, and memory interfaces in handheld devices. |
| Input Voltage Range | 2.7 V to 6 V - compatible with single-cell Li-Ion (2.7–4.2 V) and 3-cell NiMH/NiCd (3.6–4.5 V) battery inputs. |
| Switching Frequency | 3 MHz (±0.35 MHz) - allows use of sub-1-mm-height 1 µH inductors and reduces EMI fundamental frequency above sensitive bands. |
| Quiescent Current | 86 µA in PFM mode - extends battery life in standby/sleep states of always-on mobile peripherals. |
| Efficiency Peak | 93% at 3.6 VIN/1.8 VOUT, 200 mA - minimizes thermal rise in sealed enclosures and enables fanless operation. |
| Min On-Time | 35 ns - supports high step-down ratios (e.g., 5 V → 1.8 V at 36% duty cycle) without pulse skipping instability. |
Pinout & Package
TPS62303DRCR is housed in a thermally enhanced 10-pin QFN package (3 mm × 3 mm, 0.5 mm pitch) with exposed PowerPAD™ connected to PGND for optimal heat dissipation (RθJA = 49°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input supply | Connects directly to input bypass capacitor; supplies power stage; rated 7 V absolute max. |
| EN | Enable control input | Active-high logic; pull to GND for <1 µA shutdown; must not float; controls soft-start initiation. |
| MODE/SYNC | Mode selection & sync input | GND = auto PFM/PWM; VIN = forced PWM; external 3-MHz clock input for multi-rail synchronization. |
| PGND | Power ground return | Low-impedance path for switch node current; connects internally to PowerPAD™ for thermal conduction. |
| SW | Switch node | Drain connection of internal P- and N-MOSFETs; requires low-inductance layout to minimize ringing and EMI. |
| VOUT | Regulated output sense | Feedback point for output voltage regulation; connects directly to output capacitor and load. |
| AVIN | Analog input supply | Separate analog rail for bias circuitry; decouple with 0.1 µF near pin to reduce noise coupling into control loop. |
| AGND | Analog ground | Reference for FB/ADJ/EN circuits; tie to PGND via short trace or PowerPAD™ thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| 3-MHz fixed-frequency operation | Enables compact 1 µH inductor and 4.7 µF ceramic capacitor designs, reducing solution footprint by >40% vs. 500-kHz converters. |
| Auto PFM/PWM mode transition | Maintains >85% efficiency from 1 mA to 500 mA load without manual mode control or external circuitry. |
| 100% duty cycle capability | Supports ultra-low dropout operation (e.g., 2.7 VIN → 1.8 VOUT) critical for end-of-battery-life runtime extension. |
| Integrated active power-down sequencing | Internal discharge resistor (30–50 Ω) rapidly collapses VOUT during shutdown, preventing back-powering of downstream logic. |
| 35 ns minimum on-time | Permits stable 1.8 V output from 5 V input at 36% duty cycle, avoiding sub-harmonic oscillation in high-VIN applications. |
Applications
| Smartphone Baseband Power | Bluetooth/WLAN SoC Core Rail |
|---|---|
Use Scenario: Powers ARM-based application processor core or modem baseband IC in compact smartphone PCBs with tight thermal constraints. IC Role / Device Role / Timing Role: Primary 1.8-V core regulator delivering up to 500 mA with fast load transient response (<5 µs recovery). Use Value: 93% efficiency at 200 mA reduces junction temperature rise by 12°C vs. 85% efficient alternatives, enabling thinner mechanical stacks. |
Use Scenario: Supplies regulated 1.8 V to Bluetooth 5.0 or Wi-Fi 4/5 transceiver SoCs during burst transmit/receive cycles. IC Role / Device Role / Timing Role: High-frequency buck converter synchronized via MODE/SYNC pin to avoid frequency beating with RF LO signals. Use Value: 3-MHz switching places fundamental noise beyond 2.4 GHz ISM band, eliminating need for additional RF shielding. |
| PDA Application Processor Rail | Digital Camera Image Sensor Bias |
Use Scenario: Provides clean 1.8-V supply to OMAP or i.MX application processors in handheld PDAs with dynamic DVFS voltage scaling. IC Role / Device Role / Timing Role: Fixed-output buck regulator supporting dynamic voltage management via ADJ pin voltage injection (not used in TPS62303DRCR). Use Value: Soft-start limits inrush current to <100 mA during boot, preventing brownout of shared battery rail feeding display and audio subsystems. |
Use Scenario: Powers CMOS image sensor digital core and interface logic in ultra-thin digital cameras where board area is constrained. IC Role / Device Role / Timing Role: Compact 3 × 3 mm QFN regulator placed adjacent to sensor module, minimizing trace inductance for clean power delivery. Use Value: 86 µA quiescent current extends standby time to >72 hours on a 500 mAh Li-Ion cell, meeting OEM "instant-on" requirements. |
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 |
|---|---|---|---|
| TPS62303YZD | Same 1.8 V fixed output and 3-MHz operation, but in 8-pin NanoFree™ CSP (1.5 × 1.5 mm) with RθJA = 250°C/W - higher thermal resistance limits continuous 500 mA output in still-air environments. | Targeted for ultra-dense mobile modules where PCB area is more critical than thermal headroom; unsuitable for sustained 500 mA in enclosed enclosures. | Select TPS62303YZD only when board area savings outweigh thermal derating needs; verify junction temperature rise with actual airflow and copper pour. |
| TPS62313YZD | 1.8 V fixed output, 2-V UVLO (vs. 2.4 V), same CSP-8 package, but optimized for lower input range (2.3–5.5 V); shares identical pinout and control logic with TPS62303DRCR. | Preferred for systems using LiFePO4 batteries (2.5–3.65 V) or stacked coin cells where 2.4-V UVLO would cause premature shutdown. | Choose TPS62313YZD when input source minimum voltage falls below 2.4 V; note that QFN-10 footprint is not interchangeable with CSP-8. |
Compared with TPS62303YZD and TPS62313YZD, the TPS62303DRCR provides superior thermal performance (49°C/W vs. 250°C/W) and higher UVLO threshold (2.4 V), making it the preferred choice for sustained 500 mA loads in thermally constrained QFN-based designs powered by standard Li-Ion cells.
Availability
TPS62303DRCR is available at Aetrix Electronics and suitable for smartphone power management, portable medical monitors, and industrial handheld terminals requiring stable component supply and long-term production continuity.
Supply support for TPS62303DRCR 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 TPS623xx family was engineered for ultra-compact, high-frequency power delivery in battery-powered portable electronics, emphasizing minimal solution size, low quiescent current, and robust transient response under dynamic load conditions.
FAQ
What is the maximum continuous output current of the TPS62303DRCR?
The TPS62303DRCR delivers up to 500 mA continuous output current across the full operating temperature range (–40°C to +85°C) when mounted on a standard 2-layer PCB with adequate copper pour and airflow. Derating applies above 60°C ambient due to its 49°C/W thermal resistance; at 70°C ambient, maximum sustainable current drops to approximately 380 mA to maintain TJ ≤ 125°C.
Does the TPS62303DRCR require external feedback resistors to set its output voltage?
No, the TPS62303DRCR is a fixed-output variant configured for 1.8 V and does not require external feedback resistors. Its internal reference and divider are factory-trimmed; the FB and ADJ pins are not connected internally and must remain unconnected per datasheet guidance to prevent regulation errors or instability.
How does the MODE/SYNC pin function on the TPS62303DRCR?
On the TPS62303DRCR, the MODE/SYNC pin serves three functions: pulled to GND for automatic PFM/PWM mode transition, pulled to VIN for forced fixed-frequency PWM operation (reducing output ripple at light loads), or driven by an external 2.65–3.35 MHz clock signal to synchronize switching across multiple converters and suppress beat frequencies in multi-rail systems.
Can the TPS62303DRCR operate with a 1 µH inductor and 4.7 µF output capacitor?
Yes - the TPS62303DRCR is explicitly characterized and recommended for use with a 1 µH shielded inductor and 4.7 µF X5R/X7R ceramic output capacitor, as shown in Figure 1 of the datasheet. This combination achieves optimal efficiency (>90%), stable regulation, and minimal output voltage ripple (<25 mVP-P) across 1–500 mA loads at 3.6 V input.
What is the shutdown current specification for the TPS62303DRCR?
The TPS62303DRCR draws less than 1 µA shutdown current when the EN pin is pulled low. This ultra-low leakage enables extended battery shelf life in portable devices; for example, a 300 mAh Li-Ion cell would lose less than 0.26% capacity per month solely due to TPS62303DRCR shutdown current.
TPS62303DRCR 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):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS62303DRCR FAQ
1.How can I place an order for TPS62303DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62303DRCR 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 TPS62303DRCR reliable?
The price and inventory of TPS62303DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62303DRCR is usually 5 days.
3.What payment methods are accepted for TPS62303DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62303DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62303DRCR?
TPS62303DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62303DRCR 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 TPS62303DRCR?
For technical support, including TPS62303DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62303DRCR requirements.
6.How does Aetrix verify that TPS62303DRCR is sourced from the original manufacturer or authorized distributors?
All TPS62303DRCR 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 TPS62303DRCR meets industry standards.
7.What is the process for return or replacement of TPS62303DRCR?
All TPS62303DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62303DRCR, 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 TPS62303DRCR part is unused and in its original packaging.
Return procedure for TPS62303DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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