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Texas Instruments TPS62321YEDR
- Part No.:
- TPS62321YEDR
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS62321YEDR.pdf
- Description:
- IC REG BUCK 1.5V 500MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,883
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Product details
Overview
TPS62321YEDR from Texas Instruments is a 500-mA, 3-MHz synchronous step-down DC-DC converter in Chip Scale Package (CSP-8), delivering fixed 1.5 V output from 2.7–6 V input with up to 93% efficiency, 86 µA quiescent current, and integrated active power-down sequencing - designed for battery-powered mobile phones and smart-phones.
For engineers reviewing the TPS62321YEDR datasheet, TPS62321YEDR pinout, TPS62321YEDR application, or TPS62321YEDR equivalent, key selection criteria include its 1.5 V fixed output, CSP-8 thermal performance (250°C/W θJA), 35 ns minimum on-time, PFM/PWM auto-mode transition, and integrated discharge resistor for controlled power-down sequencing.
Technical Context
The TPS62321YEDR employs voltage-mode control with input voltage feed-forward for fast load/line transient response and supports seamless on-the-fly mode switching between PFM (light-load) and PWM (heavy-load). Its dual MOSFET current limiting (P-MOS: 670–890 mA; N-MOS: ±460–±740 mA) ensures stable operation during low-duty-cycle and start-up conditions.
It integrates a 3-MHz oscillator with ±0.35 MHz tolerance, supports external synchronization via MODE/SYNC pin, and features a dedicated discharge resistor (30–50 Ω) for active power-down sequencing - a capability exclusive to the TPS6232x family and absent in TPS6230x/TPS6231x variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±0.5% over –40°C to +85°C - enables direct powering of core logic in TI TMS320™ DSPs and ARM-based smartphone SoCs without external feedback resistors. |
| Input Voltage Range | 2.7 V to 6 V - supports single-cell Li-ion (3.0–4.2 V), 3-cell NiMH/NiCd (3.6 V nominal), and USB-powered systems. |
| Max Output Current | 500 mA continuous - sufficient for baseband processors, RF transceivers, and memory subsystems in compact portable devices. |
| Switching Frequency | 3 MHz (2.65–3.35 MHz range) - allows use of sub-1 µH inductors (e.g., 0.9 µH) and 4.7 µF ceramic output capacitors, minimizing solution footprint. |
| Quiescent Current | 86 µA in PFM mode - extends battery life in standby/sleep states of always-on mobile applications. |
| Shutdown Current | <1 µA - meets ultra-low-power requirements for system-level power gating. |
| Thermal Resistance | 250°C/W (θJA, CSP-8 package) - requires careful PCB copper area design for thermal management at full load. |
Pinout & Package
TPS62321YEDR is packaged in an 8-pin Chip Scale Package (CSP-8) with bottom-side ball layout and 0.5 mm pitch. The package provides low thermal resistance (250°C/W) and minimal board footprint (1.5 × 1.5 mm), optimized for space-constrained mobile designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Connects to main input rail (2.7–6 V); must be decoupled with ≥4.7 µF ceramic capacitor near package. |
| EN | Enable control | Active-high logic input; pull to GND for shutdown (<1 µA ISD), tie to VIN for operation. |
| MODE/SYNC | Mode selection & sync input | Pull to GND for auto PFM/PWM; pull to VIN for forced PWM; accept 2.65–3.35 MHz external clock for master-slave synchronization. |
| VOUT | Regulated output | Delivers fixed 1.5 V; connect directly to load and output capacitor; no external feedback required. |
| PGND | Power ground | High-current return path for internal switches; must be connected to solid ground plane under package. |
| SW | Switch node | Drain connection of internal P/N-MOSFETs; routes to inductor; sensitive to layout parasitics affecting EMI and efficiency. |
| AGND | Analog ground | Reference for internal error amplifier and bandgap; connect to PGND via short trace or thermal pad under IC. |
| FB | Feedback sense | Not connected internally on fixed-output TPS62321YEDR; must remain unconnected per datasheet to avoid malfunction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power-Down Sequencing | 30–50 Ω internal discharge resistor actively pulls VOUT to GND during shutdown - eliminates need for external circuitry in multi-rail systems requiring controlled voltage ramp-down. |
| 35 ns Minimum On-Time | Enables high step-down ratios (e.g., 6 V → 1.5 V at 3 MHz) without pulse-skipping instability, supporting wide VIN/VOUT combinations with fixed-frequency operation. |
| PFM/PWM Auto-Transition | Seamlessly shifts between high-efficiency PFM (light load) and low-noise PWM (heavy load) without external control - maintains >85% efficiency from 1 mA to 500 mA. |
| 100% Duty Cycle Operation | Allows dropout as low as VOUT + 100 mV (e.g., 1.5 V output with 1.6 V input) - critical for battery brownout survival in Li-ion systems nearing end-of-discharge. |
| 3-MHz Synchronization | Accepts external clock on MODE/SYNC pin to align switching edges across multiple converters - reduces beat frequencies and simplifies EMI filtering in multi-rail PMIC designs. |
Applications
| Mobile Phone Core Power | Smartphone Baseband SoC |
|---|---|
Use Scenario: Powers CPU cores and L1/L2 cache in 3G/4G smartphones operating from single-cell Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary 1.5 V core regulator with fast transient response to handle burst-mode processor activity. Use Value: 35 ns minimum on-time and 3-MHz switching enable tight regulation during 10–100 mA load steps with <10 mV undershoot. |
Use Scenario: Supplies 1.5 V to TI OMAP or Qualcomm Snapdragon baseband processors in compact form-factor handsets. IC Role / Device Role / Timing Role: Fixed-output buck converter with integrated power-down sequencing for coordinated system reset. Use Value: Internal 30–50 Ω discharge resistor ensures VOUT ramps down within 100 µs during EN deassertion - meeting SoC power-good timing requirements. |
| Bluetooth/WLAN Coexistence | USB-Powered DSL Modem |
Use Scenario: Powers Bluetooth 4.0 and 2.4 GHz WLAN transceivers sharing same PCB with noise-sensitive analog sections. IC Role / Device Role / Timing Role: Low-noise 3-MHz regulator with forced-PWM mode (MODE/SYNC = VIN) to eliminate frequency beating with RF LO signals. Use Value: Fixed-frequency operation suppresses sidebands in 2.4 GHz ISM band, reducing radiated emissions by >6 dB compared to PFM mode. |
Use Scenario: Provides regulated 1.5 V from 5 V USB input in compact DSL modem adapters with thermal constraints. IC Role / Device Role / Timing Role: High-efficiency buck converter leveraging 93% peak efficiency at 3.3 V → 1.5 V conversion. Use Value: 86 µA quiescent current minimizes standby power draw when modem is idle but USB remains connected. |
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 |
|---|---|---|---|
| TPS62320YED | Adjustable output (0.6–5.4 V) via external resistor divider; lacks integrated power-down sequencing resistor. | Suitable where dynamic voltage scaling (DVS) is required; not appropriate for fixed 1.5 V systems needing controlled shutdown. | Select TPS62320YED only if output voltage programmability is needed and external discharge circuitry can be added. |
| TPS62313YZD | Fixed 1.8 V output; identical CSP-8 package and 3-MHz operation, but no power-down sequencing or MODE/SYNC sync capability. | Applicable in 1.8 V I/O or memory rails where sequencing is handled externally; lower BOM cost where sync is unnecessary. | Choose TPS62313YZD for cost-sensitive 1.8 V applications without sequencing or synchronization requirements. |
Compared with TPS62321YEDR, TPS62320YED offers voltage flexibility at the expense of sequencing functionality, while TPS62313YZD trades 1.5 V precision and sync capability for lower unit cost in non-critical 1.8 V rails - making TPS62321YEDR the sole option for 1.5 V systems requiring integrated, reliable power-down control.
Availability
TPS62321YEDR is available at Aetrix Electronics and suitable for mobile phone core power, smartphone baseband SoC supply, Bluetooth/WLAN coexistence designs, and USB-powered DSL modems requiring stable component supply with consistent CSP-8 packaging and long-term production support.
Supply support for TPS62321YEDR 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 engineered specifically for ultra-thin, battery-powered handheld devices - emphasizing minimal solution size, best-in-class light-load efficiency, and robust transient performance under dynamic processor loads.
FAQ
What is the output voltage accuracy of the TPS62321YEDR over temperature?
The TPS62321YEDR delivers fixed 1.5 V output with ±0.5% DC voltage accuracy over the full –40°C to +85°C operating temperature range. This specification is confirmed in the Electrical Characteristics table under "Fixed output voltage dc accuracy" for TPS6232x devices at TA = –40°C to 85°C, ensuring stable core voltage for sensitive digital loads across environmental extremes.
Does the TPS62321YEDR require external feedback resistors?
No, the TPS62321YEDR does not require external feedback resistors. As a fixed-output variant, its 1.5 V regulation is implemented internally - the FB pin is unconnected per datasheet guidance, and the ADJ pin must remain floating or unconnected. Adding external components to these pins may disrupt regulation or cause malfunction.
Can the TPS62321YEDR be synchronized to an external clock?
Yes, the TPS62321YEDR supports external clock 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 3-MHz oscillator to the external signal's falling edge - enabling precise phase alignment across multiple TPS62321YEDR units in multi-rail systems.
What is the purpose of the integrated discharge resistor in the TPS62321YEDR?
The TPS62321YEDR integrates a 30–50 Ω discharge resistor between VOUT and PGND, activated during shutdown (EN = GND). This ensures rapid, controlled ramp-down of the output voltage - eliminating hold-up time and preventing latch-up in downstream logic, a feature unique to the TPS6232x series and absent in TPS6230x/TPS6231x variants.
Is the TPS62321YEDR pin-compatible with other TPS623xx CSP-8 variants?
Yes, the TPS62321YEDR shares identical CSP-8 pinout and footprint with all TPS623xx family members in the YED/YZD package variants, including TPS62320YED, TPS62313YZD, and TPS62303YZD. This allows drop-in replacement for functional evaluation or BOM optimization - provided output voltage, sequencing, and sync requirements align.
TPS62321YEDR 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
TPS62321YEDR FAQ
1.How can I place an order for TPS62321YEDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62321YEDR 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 TPS62321YEDR reliable?
The price and inventory of TPS62321YEDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62321YEDR is usually 5 days.
3.What payment methods are accepted for TPS62321YEDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62321YEDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62321YEDR?
TPS62321YEDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62321YEDR 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 TPS62321YEDR?
For technical support, including TPS62321YEDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62321YEDR requirements.
6.How does Aetrix verify that TPS62321YEDR is sourced from the original manufacturer or authorized distributors?
All TPS62321YEDR 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 TPS62321YEDR meets industry standards.
7.What is the process for return or replacement of TPS62321YEDR?
All TPS62321YEDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62321YEDR, 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 TPS62321YEDR part is unused and in its original packaging.
Return procedure for TPS62321YEDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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