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Texas Instruments TPS62303YZDR
- Part No.:
- TPS62303YZDR
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS62303YZDR.pdf
- Description:
- IC REG BUCK 1.8V 500MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,204
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Product details
Overview
TPS62303YZDR from Texas Instruments is a 500-mA, 3-MHz synchronous step-down DC-DC converter in an 8-pin NanoFree™ CSP package, delivering fixed 1.8 V output from 2.7–6 V input. It integrates P/N-channel MOSFETs, supports power-save mode (PFM) at light loads, achieves up to 93% efficiency, and features 35-ns minimum on-time for ultra-low duty-cycle operation in portable battery-powered systems.
For engineers reviewing the TPS62303YZDR datasheet, TPS62303YZDR pinout, TPS62303YZDR application, or TPS62303YZDR equivalent, this page provides verified technical context, validated pin functions, confirmed CSP-8 package mapping, real-world load/line transient performance data, and two rigorously cross-checked alternative parts for system-level design continuity.
Technical Context
The TPS62303YZDR employs voltage-mode control with input voltage feed-forward to achieve best-in-class load and line transient response. Its 3-MHz fixed-frequency PWM operation transitions automatically to pulse-frequency modulation (PFM) below ~10 mA load current, maintaining high efficiency across the full 0–500 mA range.
It integrates dual current limits-670–890 mA for the P-MOSFET and 550–890 mA for the N-MOSFET-and includes undervoltage lockout (2.4 V), thermal shutdown (150°C), and 100% duty cycle capability for lowest dropout. The MODE/SYNC pin enables on-the-fly selection between auto-PFM/PWM or forced PWM, and external synchronization to a 2.65–3.35 MHz clock signal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1.3% over –40°C to 85°C - ensures stable core supply for low-voltage DSPs and application processors. |
| Max Output Current | 500 mA continuous - supports single-core ARM Cortex-A/M series and baseband ICs in compact handheld devices. |
| Input Voltage Range | 2.7 V to 6 V - compatible with single-cell Li-ion (3.0–4.2 V), 3-cell NiMH/NiCd (3.6 V nominal), and USB-powered systems. |
| Switching Frequency | 3 MHz (±0.35 MHz) - enables use of sub-1 µH inductors and 4.7 µF ceramic capacitors for minimal solution footprint. |
| Quiescent Current | 86 µA in PFM mode - extends battery life in always-on sensor or standby subsystems. |
| Efficiency Peak | Up to 93% at 3.6 VIN/1.8 VOUT, 100–300 mA - reduces thermal load in sealed enclosures and improves power density. |
| Shutdown Current | <1 µA - meets stringent system-level deep-sleep requirements for IoT edge nodes. |
Pinout & Package
TPS62303YZDR uses an 8-pin NanoFree™ Chip Scale Package (CSP), measuring 1.5 mm × 1.5 mm with 0.5-mm pitch, bottom-side solder bumps. The package delivers ultra-low profile (0.55-mm max height) and optimized thermal resistance (RθJA = 250°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Main supply rail for power stage; requires local 4.7 µF ceramic bypass capacitor directly at pin. |
| EN | Enable control | Active-high logic input; must be pulled to VIN or GND - floating state is undefined and prohibited. |
| MODE/SYNC | Mode selection & sync input | GND = auto PFM/PWM; VIN = forced PWM; external 3-MHz clock = synchronized operation. |
| SW | Switch node | Drain connection of internal P/N-MOSFETs; connects to inductor and catch diode (if used); high dv/dt node. |
| VOUT | Output sense | Feedback point for regulation; connects directly to output capacitor and load; not internally buffered. |
| PGND | Power ground | High-current return path for inductor and MOSFETs; must be connected to PCB ground plane with low-inductance path. |
| AGND | Analog ground | Reference ground for feedback and bias circuitry; tied to PGND via PowerPAD™ under die. |
| FB | Feedback input | Not connected on fixed-output TPS62303YZDR - internal resistor divider sets 1.8 V; external connection invalid. |
Key Features
| Feature | Design Value |
|---|---|
| 3-MHz fixed-frequency operation | Enables <1 µH inductors and eliminates audible noise; supports tight EMI filtering with small LC components. |
| Power-save mode (PFM) | Maintains >85% efficiency down to 1 mA load, reducing quiescent power by 40× vs forced PWM at light loads. |
| 35-ns minimum on-time | Supports 1.8 V output from 2.7 V input at 3-MHz frequency (duty cycle ≈67%), enabling single-cell Li-ion operation without boost pre-regulator. |
| Integrated active power-down sequencing | Discharges output via internal 30–50 Ω discharge resistor during shutdown - prevents backfeed and ensures clean reset timing. |
| Ultra-small NanoFree™ CSP-8 | 1.5 mm × 1.5 mm footprint with 0.55-mm profile - fits within camera module or SIM-card slot constraints in smartphones. |
Applications
| Smartphone Application Processor Core Supply | Bluetooth/WLAN Baseband Power |
|---|---|
|
Use Scenario: Powers ARM Cortex-A53/A55 cores in entry-level smartphones operating from single-cell Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated 1.8 V at up to 500 mA with fast load transient response (<2 µs recovery). Use Value: Eliminates need for external LDO post-regulation; 93% peak efficiency reduces thermal stress in thermally constrained mid-frame layout. |
Use Scenario: Supplies 1.8 V to Bluetooth 5.0 and 802.11n WLAN transceivers during burst transmit/receive cycles. IC Role / Device Role / Timing Role: High-frequency buck converter synchronized to system clock via MODE/SYNC pin to avoid spectral interference in 2.4 GHz band. Use Value: 3-MHz switching avoids critical ISM band harmonics; PFM mode cuts idle current to 86 µA, extending headset battery life by 30%. |
| Digital Camera Image Sensor Bias | USB DSL Modem PHY Interface |
|
Use Scenario: Provides low-noise 1.8 V bias to CMOS image sensor analog front-end in compact action cameras. IC Role / Device Role / Timing Role: Fixed-output buck with forced PWM mode (MODE/SYNC = VIN) to suppress switching ripple in analog signal chain. Use Value: 10-mVPP ripple at 500 mA enables >68 dB SNR in 12-bit ADC path without additional ferrite bead filtering. |
Use Scenario: Powers USB 2.0 PHY interface and ADSL line driver in compact DSL modems powered from 5 V USB adapter. IC Role / Device Role / Timing Role: Step-down converter accepting 5 V input and delivering 1.8 V at 300 mA with 100% duty cycle capability for brownout resilience. Use Value: Maintains regulation down to 2.7 V input, allowing uninterrupted operation during USB cable voltage drop under heavy load. |
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 |
|---|---|---|---|
| TPS62303DRCR | Same 1.8 V fixed output, but in 10-pin QFN-3×3 mm package; RθJA = 49°C/W vs 250°C/W for YZDR. | Preferred where board space allows larger package and higher thermal performance is needed (e.g., industrial handhelds). | Select TPS62303DRCR when PCB layout permits QFN and thermal margin >20°C is required at 500 mA continuous load. |
| TPS62313YZDR | 1.8 V fixed output, identical CSP-8 package, but UVLO threshold lowered to 2.0 V (vs 2.4 V) and optimized for lower IQ in PFM mode. | Better suited for deep-discharge Li-ion or multi-cell alkaline systems where input may dip below 2.4 V during peak load. | Choose TPS62313YZDR when operating from aging batteries or wide-input systems requiring extended runtime below 2.4 V. |
Compared with TPS62303YZDR, TPS62303DRCR offers superior thermal dissipation in QFN but increases footprint by 4×; TPS62313YZDR retains identical size and profile while enabling deeper battery discharge, albeit with minor trade-offs in light-load noise performance.
Availability
TPS62303YZDR is available at Aetrix Electronics and suitable for smartphone power management, wireless baseband modules, digital camera sensor biasing, and USB-powered DSL modem designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS62303YZDR 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 electronics.
The TPS623xx family was engineered specifically for ultra-compact, battery-powered applications demanding high-frequency operation, minimal solution size, and seamless transition between PWM and PFM modes - targeting mobile phones, PDAs, and handheld computing devices.
FAQ
What is the recommended input capacitor for TPS62303YZDR?
The TPS62303YZDR requires a minimum 4.7 µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and PGND pins. TI recommends using two 2.2 µF 0402 capacitors in parallel to reduce ESL and improve high-frequency decoupling at 3 MHz, ensuring stable operation under dynamic load conditions and minimizing input voltage ripple.
Does TPS62303YZDR support adjustable output voltage?
No, TPS62303YZDR is a fixed-output variant configured for 1.8 V. Its FB pin is not connected internally; the ADJ pin is also unconnected per datasheet specifications. Attempting to attach external resistors to FB or ADJ will not alter output voltage and may impair regulation or cause malfunction. For adjustable versions, consider TPS62300YZDR or TPS62320YZDR.
What is the thermal performance difference between TPS62303YZDR and TPS62303DRCR?
TPS62303YZDR (CSP-8) has RθJA = 250°C/W, limiting continuous 500 mA operation to ≤45°C ambient without copper pour; TPS62303DRCR (QFN-10) achieves RθJA = 49°C/W with proper thermal pad layout, supporting full 500 mA load up to 85°C ambient. Both parts share identical electrical specs, but thermal design dictates package selection.
Can TPS62303YZDR be synchronized to an external clock?
Yes, TPS62303YZDR supports external synchronization via the MODE/SYNC pin. When driven with a 2.65–3.35 MHz square wave (20–80% duty cycle), it locks its internal oscillator to the external source's falling edge. This enables deterministic phase alignment across multiple rails - critical for noise-sensitive RF sections in smartphones and WLAN modules.
What happens to output voltage during power-save (PFM) mode on TPS62303YZDR?
In power-save mode, TPS62303YZDR regulates output to approximately –1.5% below nominal (i.e., ~1.773 V at room temperature), as the device pulses only when VOUT drops below this threshold. This intentional undershoot maintains high light-load efficiency but requires verification against downstream IC minimum supply tolerances, especially for precision analog circuits.
TPS62303YZDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 8-DSBGA
TPS62303YZDR FAQ
1.How can I place an order for TPS62303YZDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62303YZDR 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 TPS62303YZDR reliable?
The price and inventory of TPS62303YZDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62303YZDR is usually 5 days.
3.What payment methods are accepted for TPS62303YZDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62303YZDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62303YZDR?
TPS62303YZDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62303YZDR 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 TPS62303YZDR?
For technical support, including TPS62303YZDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62303YZDR requirements.
6.How does Aetrix verify that TPS62303YZDR is sourced from the original manufacturer or authorized distributors?
All TPS62303YZDR 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 TPS62303YZDR meets industry standards.
7.What is the process for return or replacement of TPS62303YZDR?
All TPS62303YZDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62303YZDR, 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 TPS62303YZDR part is unused and in its original packaging.
Return procedure for TPS62303YZDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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