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Texas Instruments TPS62303YZDT
- Part No.:
- TPS62303YZDT
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS62303YZDT.pdf
- Description:
- IC REG BUCK 1.8V 500MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,359
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Product details
Overview
TPS62303YZDT from Texas Instruments is a 500-mA, 3-MHz synchronous step-down DC-DC converter in an 8-pin Chip Scale Package (CSP), delivering fixed 1.8 V output from 2.7–6 V input. It features up to 93% efficiency at 3-MHz operation, 86-µA quiescent current in power-save mode, and supports dynamic voltage management for portable Li-Ion/NiMH-powered systems including smartphones and WLAN modules.
For engineers reviewing the TPS62303YZDT datasheet, TPS62303YZDT pinout, TPS62303YZDT application, or TPS62303YZDT equivalent, key selection criteria include its 1.8-V fixed output, CSP-8 thermal performance (RθJA = 250°C/W), 35-ns minimum on-time for low-duty-cycle operation, and MODE/SYNC-controlled PFM/PWM transition - critical for battery life optimization in space-constrained mobile designs.
Technical Context
The TPS62303YZDT employs a voltage-mode PWM controller with input voltage feed-forward for fast line/load transient response. Its dual MOSFET current-limit architecture (P-MOS: 670–890 mA; N-MOS: ±460–±740 mA) enables stable operation across wide duty cycles, including 100% dropout mode.
It operates in automatic PFM/PWM mode when MODE/SYNC is grounded, switching to forced PWM at light loads when pulled high. Synchronization to external 3-MHz clocks is supported via the same pin, enabling multi-rail timing coherence without additional clock buffers.
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. |
| 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 (2.65–3.35 MHz range) - enables use of sub-1-µH inductors and 4.7-µF ceramic capacitors for ultra-compact PCB layouts. |
| Max Output Current | 500 mA continuous - sufficient for RF transceivers, baseband ICs, and memory subsystems in handheld devices. |
| Quiescent Current | 86 µA in PFM mode - extends battery runtime during standby/sleep states in always-on connectivity applications. |
| Efficiency Peak | 93% at 3.6 VIN/1.8 VOUT, 200 mA - minimizes thermal dissipation in sealed enclosures like smartphones and digital cameras. |
| Shutdown Current | <1 µA - meets stringent system-level power-down requirements for zero-leakage sleep modes. |
Pinout & Package
TPS62303YZDT uses an 8-pin NanoFree™ Chip Scale Package (CSP), measuring 1.5 mm × 1.5 mm with 0.5-mm pitch, optimized for minimal board area and thermal resistance (RθJA = 250°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Connects directly to input bypass capacitor; supplies power stage - must be decoupled within 2 mm for EMI control. |
| EN | Enable control | Active-high logic input; pull to GND for shutdown (<1 µA ISD); requires explicit termination - no floating. |
| ADJ | Adjust reference input | Not connected on fixed-output TPS62303YZDT - leaving unconnected avoids feedback instability per TI design guidelines. |
| FB | Feedback sense | Internally tied to regulated 0.4-V reference; not connected on fixed-output variants - external resistor divider omitted. |
| VOUT | Output sense | Direct connection to output rail; used for remote sensing in high-current paths to compensate trace IR drop. |
| MODE/SYNC | Mode control / clock sync | GND = auto PFM/PWM; VI = forced PWM; external 3-MHz clock sync enabled - all functions share one pin. |
| PGND | Power ground | Low-impedance return path for switch node current - must be solidly connected to thermal pad under package. |
| SW | Switch node | Drain connection of internal P/N-MOSFETs; routes to external inductor - layout critical for EMI and efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| 3-MHz fixed-frequency operation | Enables <1-µH inductors and small 4.7-µF X5R/X7R ceramics - reduces solution footprint by >40% vs. 500-kHz converters. |
| Power-save mode at light load | Reduces quiescent current to 86 µA while maintaining regulation - extends battery life in intermittent-activity devices like Bluetooth headsets. |
| 100% duty cycle capability | Supports ultra-low dropout (VIN – VOUT < 100 mV) during brownout - sustains processor operation down to 1.9-V battery voltage. |
| On-the-fly mode synchronization | Allows seamless transition between PFM and forced-PWM during runtime - enables adaptive noise/efficiency trade-offs in real-time. |
| Integrated active power-down sequencing | Internal discharge resistor (30–50 Ω) rapidly collapses VOUT during shutdown - prevents back-powering of downstream logic. |
Applications
| Smartphone Baseband Power | WLAN/Bluetooth Coexistence |
|---|---|
Use Scenario: Powers ARM-based application processor cores and DDR memory interfaces in compact smartphone PCBs. IC Role / Device Role / Timing Role: Primary 1.8-V core regulator with fast transient response to handle burst-mode CPU activity. Use Value: 35-ns minimum on-time and 3-MHz switching maintain regulation during 10–100 mA load steps with <20-mV droop. |
Use Scenario: Supplies 1.8-V bias to 2.4-GHz WLAN and Bluetooth combo chips sharing same RF module. IC Role / Device Role / Timing Role: Low-noise, synchronized DC-DC source preventing beat-frequency interference between radios. Use Value: MODE/SYNC pin allows master-slave frequency alignment across multiple rails - eliminates intermodulation spurs. |
| Digital Camera Image Sensor | USB DSL Modem PHY |
Use Scenario: Powers CMOS image sensor analog front-end and column ADC in battery-operated digital cameras. IC Role / Device Role / Timing Role: High-efficiency, low-ripple supply minimizing analog noise coupling into pixel readout paths. Use Value: 93% peak efficiency at 200 mA reduces thermal rise near heat-sensitive optics - maintains SNR > 42 dB. |
Use Scenario: Delivers regulated 1.8-V supply to USB 2.0 PHY and ADSL line driver in portable DSL modems. IC Role / Device Role / Timing Role: Input-capable down to 2.7 V supports operation from USB bus-powered 5-V input via LDO pre-regulator. Use Value: 2.7–6 V input range accommodates variable USB port voltage (4.4–5.25 V) plus margin for cable drop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62303DRC | Same 1.8-V fixed output, but in 10-pin QFN (3×3 mm) - RθJA = 49°C/W vs. 250°C/W for CSP. | Better thermal performance in high-ambient or high-power-density boards; larger footprint limits ultra-compact designs. | Select when board layout allows 3×3 mm area and thermal management prioritizes junction temperature over size. |
| TPS62313YZD | 1.8-V fixed output, 2-V UVLO (vs. 2.4 V), lower RθJA (250°C/W), identical CSP-8 package and pinout. | Enables operation down to 2.0-V input - suitable for deeper battery discharge in long-life IoT sensors. | Choose when extended input range below 2.4 V is required without changing PCB layout or BOM footprint. |
Compared with TPS62303YZDT, TPS62303DRC offers superior thermal dissipation in QFN but occupies 4.5× more board area, while TPS62313YZD provides identical form factor with lower UVLO threshold - making it ideal for deep-discharge battery systems where 1.8-V regulation must persist beyond 2.4-V cutoff.
Availability
TPS62303YZDT is available at Aetrix Electronics and suitable for smartphone baseband power, WLAN/Bluetooth coexistence, digital camera image sensor bias, and USB-based DSL modem PHY applications requiring stable component supply across production lifecycles.
Supply support for TPS62303YZDT 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 for portable electronics.
The TPS623xx family was designed specifically for battery-powered portable devices demanding ultra-small footprint, high efficiency across load range, and robust transient response - targeting smartphones, PDAs, and wireless modules.
FAQ
What is the output voltage tolerance of the TPS62303YZDT over temperature and load?
The TPS62303YZDT delivers a fixed 1.8-V output with DC accuracy of –0.5% to +1.3% across –40°C to +85°C ambient and 0–500 mA load range. This specification is confirmed in the Electrical Characteristics table under "Fixed output voltage dc accuracy" for TPS6230x devices, ensuring reliable core voltage for low-voltage processors without external trimming.
Does the TPS62303YZDT require external compensation components?
No, the TPS62303YZDT integrates full internal compensation for its voltage-mode control loop. The device is optimized for use with standard 1-µH inductors and 4.7-µF ceramic output capacitors - no external RC networks or compensation pins are needed, simplifying layout and reducing BOM count.
Can the TPS62303YZDT operate with a 2.5-V input voltage?
Yes, the TPS62303YZDT supports input voltages as low as 2.7 V per Absolute Maximum Ratings and Recommended Operating Conditions. A 2.5-V input falls below the 2.7-V minimum and risks improper regulation or UVLO activation - operation is not guaranteed and may result in output dropout or instability.
How does the MODE/SYNC pin affect efficiency in light-load conditions?
When MODE/SYNC is grounded, the TPS62303YZDT enters power-save mode (PFM), achieving 86-µA quiescent current and >85% efficiency at 1-mA load. Pulling MODE/SYNC high forces fixed-frequency PWM, increasing IQ to ~3.6 mA and reducing light-load efficiency by 15–20 percentage points - a deliberate trade-off for EMI control.
Is the TPS62303YZDT pin-compatible with other members of the TPS623xx family in CSP-8?
Yes, all TPS623xx devices in the YZD CSP-8 package (including TPS62301YZD, TPS62302YZD, TPS62303YZDT, TPS62313YZD) share identical pinout, footprint, and thermal pad configuration. This allows direct substitution for different output voltages (1.5 V, 1.6 V, 1.8 V, etc.) without PCB redesign.
TPS62303YZDT 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
TPS62303YZDT FAQ
1.How can I place an order for TPS62303YZDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62303YZDT 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 TPS62303YZDT reliable?
The price and inventory of TPS62303YZDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62303YZDT is usually 5 days.
3.What payment methods are accepted for TPS62303YZDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62303YZDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62303YZDT?
TPS62303YZDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62303YZDT 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 TPS62303YZDT?
For technical support, including TPS62303YZDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62303YZDT requirements.
6.How does Aetrix verify that TPS62303YZDT is sourced from the original manufacturer or authorized distributors?
All TPS62303YZDT 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 TPS62303YZDT meets industry standards.
7.What is the process for return or replacement of TPS62303YZDT?
All TPS62303YZDT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62303YZDT, 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 TPS62303YZDT part is unused and in its original packaging.
Return procedure for TPS62303YZDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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