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Texas Instruments TPS62321YZDR
- Part No.:
- TPS62321YZDR
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS62321YZDR.pdf
- Description:
- IC REG BUCK 1.5V 500MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,693
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Product details
Overview
TPS62321YZDR from Texas Instruments is a 500-mA, 3-MHz synchronous step-down DC-DC converter in an 8-pin CSP package, delivering fixed 1.5 V output with ±0.5% to +1.3% DC voltage accuracy over temperature, 86 µA quiescent current, and up to 93% efficiency - optimized for battery-powered portable devices including smartphones and WLAN modules.
For engineers reviewing the TPS62321YZDR datasheet, TPS62321YZDR pinout, TPS62321YZDR application, or TPS62321YZDR equivalent, key selection criteria include its 1.5 V fixed output, QFN-10/CSP-8 dual-package availability, integrated active power-down sequencing (TPS6232x only), 35-ns minimum on-time, and support for external clock synchronization at 3 MHz.
Technical Context
The TPS62321YZDR employs a voltage-mode PWM controller with input voltage feed-forward for fast load/line transient response and operates at a fixed 3-MHz switching frequency. It integrates P-channel and N-channel MOSFETs with current limits of 670–890 mA (P-MOS) and ±460–±740 mA (N-MOS), enabling stable operation down to 0.6 V output via external resistor divider in adjustable variants.
In light-load conditions, it automatically enters power-save mode (PFM) with pulse-skipping to maintain high efficiency; pulling MODE/SYNC high forces continuous PWM operation for low-noise applications. Its integrated soft-start limits inrush current, and thermal shutdown activates at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V - eliminates need for external feedback resistors; supports low-voltage DSPs and processors. |
| Max Output Current | 500 mA - sufficient for core logic rails in handheld computing and mobile communication ICs. |
| Switching Frequency | 3 MHz (2.65–3.35 MHz range) - enables use of sub-1-µH inductors and compact 4.7-µF ceramic capacitors. |
| Quiescent Current | 86 µA in PFM mode - extends battery life in always-on subsystems like Bluetooth baseband. |
| DC Voltage Accuracy | –0.5% to +1.3% over –40°C to +85°C - ensures stable core voltage under thermal stress without recalibration. |
| 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), and USB-powered systems. |
| Shutdown Current | 0.1–1 µA - meets ultra-low-power requirements during system sleep or standby states. |
Pinout & Package
TPS62321YZDR is packaged in an 8-pin Chip Scale Package (CSP-8), measuring 1.5 mm × 1.5 mm with 0.5-mm pitch, featuring bottom-side solder bumps for minimal PCB footprint and thermal performance via direct die attach.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Main supply rail connection; must be decoupled with ≥4.7 µF ceramic capacitor near pin. |
| EN | Enable control | Active-high logic input; tie to GND for shutdown (<1 µA IQ); requires pull-up for default operation. |
| ADJ | Adjust reference input | Not connected on fixed-output TPS62321YZDR; must remain unconnected per datasheet guidance. |
| FB | Feedback sense | Internally tied to 1.5 V reference; not accessible on fixed-output variant - no external divider required. |
| VOUT | Regulated output | Provides 1.5 V output; connects directly to load and output capacitor (4.7 µF typical). |
| MODE/SYNC | Mode control / sync input | Configures PFM/PWM auto-switching (GND) or forced PWM (VIN); accepts 3-MHz external clock for multi-rail synchronization. |
| PGND | Power ground | High-current return path for internal switches; must be low-impedance copper pour tied to VIN bypass cap ground. |
| SW | Switch node | Connects to inductor; carries high dv/dt switching waveform - requires tight layout and minimal trace length. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated active power-down sequencing | Discharges VOUT through internal 30–50 Ω discharge resistor during shutdown - prevents backfeed and ensures clean rail collapse. |
| 35-ns minimum on-time | Enables high duty-cycle operation at low VIN-to-VOUT ratios (e.g., 2.7 V → 1.5 V), supporting wide input range without dropout. |
| 100% duty cycle capability | Maintains regulation even when VIN drops to within ~100 mV of VOUT - critical for Li-ion end-of-discharge operation. |
| Synchronizable 3-MHz operation | Eliminates beat frequencies in multi-converter systems (e.g., RF + baseband rails) by aligning switching edges to master clock. |
| Ultra-thin 0.55-mm profile | Meets height constraints in slim mobile form factors (e.g., <1.0 mm Z-height camera modules or SIM card slots). |
Applications
| Smartphone Application Processor Core Rail | WLAN/Bluetooth Baseband Power Supply |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 1.5 V at up to 500 mA peak current during burst processing. IC Role / Device Role / Timing Role: Primary buck regulator delivering low-noise, dynamically responsive core voltage with soft-start and thermal protection. Use Value: Maintains >90% efficiency across 1–500 mA load range and supports dynamic voltage scaling via MODE/SYNC pin control. |
Use Scenario: Supplies 1.5 V to IEEE 802.11n/Bluetooth 4.0 transceivers in compact IoT edge nodes with strict EMI limits. IC Role / Device Role / Timing Role: High-frequency DC-DC converter synchronized to system clock to avoid spectral interference in 2.4 GHz ISM band. Use Value: 3-MHz fixed-frequency PWM mode (via MODE/SYNC = VIN) enables predictable noise filtering with small LC components. |
| Digital Camera Image Sensor Bias Rail | USB-Powered DSL Modem PHY Interface |
Use Scenario: Provides low-ripple 1.5 V bias to CMOS image sensors in mobile cameras where PSRR and transient response affect image quality. IC Role / Device Role / Timing Role: Compact, high-PSRR buck converter with fast line/load transient response (<10 µs settling) and integrated soft-start. Use Value: Achieves <25 mVpp ripple at 1 mA load (power-save mode) and <10 mVpp in forced PWM - reduces sensor readout noise. |
Use Scenario: Powers Ethernet PHY interface ICs in USB-based DSL modems operating from 5 V USB bus with tight space constraints. IC Role / Device Role / Timing Role: Step-down converter accepting 5 V USB input and delivering 1.5 V at 300 mA with minimal board area. Use Value: CSP-8 package (1.5 × 1.5 mm) and 3-MHz operation allow full solution size < 15 mm² - fits narrow USB dongle PCBs. |
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 |
|---|---|---|---|
| TPS62320YZDR | Adjustable output (0.6–5.4 V) via external resistor divider; same 1.5 V nominal accuracy spec but requires two external resistors. | Suitable for designs needing multiple output voltages from one BOM or future-proofing for voltage scaling. | Select TPS62320YZDR only if programmability justifies added component count and layout complexity. |
| TPS62313YZDR | Fixed 1.8 V output; identical package, pinout, and electrical specs except output voltage and UVLO threshold (2.0 V vs 2.4 V). | Better suited for 1.8 V I/O or memory rails; lower UVLO allows earlier startup from partially discharged batteries. | Choose TPS62313YZDR when powering 1.8 V peripherals; not a drop-in replacement due to different output voltage and UVLO. |
Compared with TPS62321YZDR, TPS62320YZDR adds design flexibility at the cost of two passive components, while TPS62313YZDR offers identical integration for 1.8 V systems but requires board-level validation for voltage compatibility and battery cutoff behavior.
Availability
TPS62321YZDR is available at Aetrix Electronics and suitable for smartphone power management, WLAN module design, and USB-powered modem development requiring stable component supply, consistent CSP-8 packaging, and long-term production continuity.
Supply support for TPS62321YZDR 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 space-constrained, battery-operated devices demanding high-frequency operation, ultra-low quiescent current, and seamless transition between PWM and power-save modes - targeting mobile phones, PDAs, and wireless modules.
FAQ
What is the output voltage of the TPS62321YZDR?
The TPS62321YZDR delivers a fixed 1.5 V output voltage with a DC accuracy of –0.5% to +1.3% over temperature (–40°C to +85°C). This fixed output eliminates the need for external feedback resistors, simplifying layout and reducing BOM count. The TPS62321YZDR does not support adjustable output - the ADJ and FB pins are internally configured and must remain unconnected per TI's datasheet guidance.
Does the TPS62321YZDR support external clock synchronization?
Yes, the TPS62321YZDR supports external clock synchronization via the MODE/SYNC pin, accepting a 3-MHz input signal (2.65–3.35 MHz range) with 20%–80% duty cycle. When synchronized, the P-channel MOSFET turn-on is aligned to the falling edge of the external clock, enabling deterministic timing in multi-rail systems. This feature is confirmed in the functional block diagram and electrical characteristics table of the SLVS528E datasheet.
What package type is used for the TPS62321YZDR?
The TPS62321YZDR uses an 8-pin Chip Scale Package (CSP-8), also referenced as NanoStar™ packaging, with dimensions of 1.5 mm × 1.5 mm and 0.5-mm pitch. It is distinct from the 10-pin QFN-10 option (e.g., TPS62321DRC) - the YZDR suffix explicitly denotes the CSP-8 variant. The package features bottom-side solder bumps and requires standard reflow profiles for micro-BGA assembly.
How does the TPS62321YZDR manage efficiency at light loads?
The TPS62321YZDR automatically enters power-save mode (PFM) at light loads, reducing switching frequency via pulse-skipping to maintain >85% efficiency down to 1 mA. In this mode, output voltage regulation occurs by pulsing only when VOUT drops below –1.5% of nominal (1.4775 V), then ramping back up. Quiescent current remains at 86 µA, and start-up time is 250 µs - verified in Figure 28 and Electrical Characteristics tables of the datasheet.
Is the TPS62321YZDR pin-compatible with other TPS623xx devices?
No - the TPS62321YZDR (CSP-8) is not pin-compatible with QFN-10 variants like TPS62321DRC. While both share identical functionality and pin functions, the physical pin count, layout, and pad configuration differ. The CSP-8 has 8 terminals (VIN, EN, ADJ, FB, VOUT, MODE/SYNC, PGND, SW), whereas QFN-10 adds AVIN and AGND. Board redesign is required when substituting between packages.
TPS62321YZDR 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):
- 1.5V
- 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
TPS62321YZDR FAQ
1.How can I place an order for TPS62321YZDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62321YZDR 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 TPS62321YZDR reliable?
The price and inventory of TPS62321YZDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62321YZDR is usually 5 days.
3.What payment methods are accepted for TPS62321YZDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62321YZDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62321YZDR?
TPS62321YZDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62321YZDR 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 TPS62321YZDR?
For technical support, including TPS62321YZDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62321YZDR requirements.
6.How does Aetrix verify that TPS62321YZDR is sourced from the original manufacturer or authorized distributors?
All TPS62321YZDR 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 TPS62321YZDR meets industry standards.
7.What is the process for return or replacement of TPS62321YZDR?
All TPS62321YZDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62321YZDR, 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 TPS62321YZDR part is unused and in its original packaging.
Return procedure for TPS62321YZDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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