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Texas Instruments TPS62320YZDT
- Part No.:
- TPS62320YZDT
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS62320YZDT.pdf
- Description:
- IC REG BUCK ADJ 500MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,700
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Product details
Overview
TPS62320YZDT from Texas Instruments is an adjustable-output, 500-mA, 3-MHz synchronous step-down DC-DC converter in an 8-pin CSP package. It operates from 2.7 V to 6 V input, delivers ±0.5% to +1.3% DC voltage accuracy over temperature, supports power-save mode at light loads, and integrates active power-down sequencing. It targets space-constrained portable applications such as smartphones and PDAs powered by single-cell Li-Ion batteries.
For engineers reviewing the TPS62320YZDT datasheet, TPS62320YZDT pinout, TPS62320YZDT application, or TPS62320YZDT equivalent, key selection criteria include its 35-ns minimum on-time, 86-µA quiescent current in PFM mode, 100% duty cycle capability for low-dropout operation, integrated discharge resistor for controlled power-down, and compatibility with tiny 1-µH inductors and 4.7-µF ceramic capacitors.
Technical Context
The TPS62320YZDT employs a voltage-mode PWM controller with input voltage feed-forward for fast transient response and stable regulation across wide load and line variations. Its dual MOSFET current-limit architecture-780 mA P-channel and 720 mA N-channel-enables robust short-circuit protection and reliable start-up under low-VOUT conditions.
It features automatic transition between fixed-frequency PWM (at moderate/heavy loads) and pulse-frequency modulation (PFM) at light loads, with on-the-fly synchronization to external 3-MHz clocks via the MODE/SYNC pin. The integrated soft-start and active power-down sequencing (via RDIS = 30–50 Ω) ensure controlled ramp-up and safe output discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 6 V - supports single-cell Li-Ion (2.7–4.2 V) and 3-cell NiMH/NiCd battery inputs without pre-regulation. |
| Output Current | 500 mA continuous - sufficient for core logic rails of DSPs, microcontrollers, and RF ICs in handheld devices. |
| Switching Frequency | 3 MHz (±0.35 MHz) - enables use of sub-1-mm-height 1-µH inductors and reduces output ripple filtering burden. |
| Quiescent Current | 86 µA in PFM mode - extends battery runtime in standby/sleep states of portable electronics. |
| DC Voltage Accuracy | −0.5% to +1.3% over −40°C to +85°C - ensures stable core voltage for low-voltage processors (e.g., TMS320™ family). |
| Minimum On-Time | 35 ns - supports high step-down ratios (e.g., 5.4 V → 0.6 V) even at 3-MHz switching, critical for ultra-low-VOUT rails. |
| Shutdown Current | 0.1–1 µA - meets stringent system-level leakage requirements during deep-sleep or off-state. |
Pinout & Package
TPS62320YZDT is packaged in an 8-pin Chip Scale Package (CSP), measuring 1.5 mm × 1.5 mm with 0.5-mm pitch, optimized for minimal PCB footprint and thermal performance (RθJA = 250°C/W). The package uses bottom-side ball terminations and requires standard reflow profiles for NanoFree™ assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input to high-side switch | Connects directly to input bypass capacitor; handles full input current up to 500 mA. |
| EN | Enable control input | Pull high to enable; pull low (GND) to enter shutdown with <1 µA current draw. |
| ADJ | Adjustable feedback reference input | Sets output voltage via external resistor divider; also accepts direct voltage programming (VOUT = 1.5 × VADJ). |
| FB | Feedback sense input | Internal 0.4-V reference node; connects to resistor divider midpoint for closed-loop regulation. |
| VOUT | Output voltage sense point | Direct connection to regulated output rail; used for remote sensing to compensate trace IR drop. |
| MODE/SYNC | Mode control & external clock sync | GND = auto PFM/PWM; VIN = forced PWM; external 3-MHz clock synchronizes switching edge. |
| PGND | Power ground return | Low-impedance path for inductor current return; must be connected to solid ground plane. |
| SW | Switch node | Drain connection of internal P/N-MOSFETs; routes to external inductor; requires tight layout to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| 3-MHz fixed-frequency operation | Enables compact BOM with 1-µH inductors and 4.7-µF X5R/X7R ceramics, reducing solution size below 10 mm². |
| Integrated active power-down sequencing | On-chip 30–50 Ω discharge resistor safely collapses VOUT during shutdown, eliminating need for external circuitry. |
| 100% duty cycle capability | Supports dropout operation down to VIN − VOUT ≈ 0 V, extending usable battery range in Li-Ion systems near end-of-discharge. |
| 35-ns minimum on-time | Permits high conversion ratios (e.g., 5.4 V → 0.6 V) at 3 MHz, enabling direct regulation for ultra-low-voltage cores. |
| Power-save mode with PFM | Maintains >85% efficiency at 1 mA load, critical for always-on functions like RTC, sensors, and wake-up circuitry. |
Applications
| Smartphone Core Rail | Bluetooth/WLAN SoC Power |
|---|---|
Use Scenario: Regulating 1.2–1.8 V core supply for application processors and baseband ICs in slim smartphone designs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 500 mA with fast load transient response and minimal board area. Use Value: 3-MHz operation and CSP packaging reduce total solution size to <10 mm² while maintaining >90% peak efficiency at 3.6 VIN/1.8 VOUT. |
Use Scenario: Powering 3.3 V or adjustable 1.2–1.8 V rails for Bluetooth/WLAN combo chips requiring low-noise, dynamically scalable voltage. IC Role / Device Role / Timing Role: Adjustable buck converter with MODE/SYNC pin enabling synchronized switching to avoid frequency beating in multi-rail RF subsystems. Use Value: External clock synchronization eliminates beat frequencies between multiple converters, reducing conducted EMI in sensitive 2.4-GHz bands. |
| PDA/Handheld CPU Supply | Digital Camera Image Sensor Bias |
Use Scenario: Providing clean, efficient 1.5 V core voltage to ARM-based CPUs in pocket PCs with limited battery capacity. IC Role / Device Role / Timing Role: High-efficiency step-down regulator supporting dynamic voltage scaling (DVS) via ADJ pin voltage programming. Use Value: Direct ADJ pin control allows real-time VOUT adjustment (e.g., 1.5 V ↔ 1.2 V) without external DAC, simplifying DVS implementation. |
Use Scenario: Generating stable 2.8 V or 3.3 V bias for CMOS image sensor analog front-ends where low ripple and fast transient response are essential. IC Role / Device Role / Timing Role: Low-noise buck converter operating in forced PWM mode (MODE/SYNC = HIGH) to suppress switching noise near sensitive analog circuits. Use Value: Fixed 3-MHz PWM operation minimizes spectral energy near image sensor sampling frequencies, preventing visible banding artifacts. |
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 |
|---|---|---|---|
| TPS62321YZD | Fixed 1.5 V output; identical CSP-8 package, pinout, and electrical specs except output voltage and FB/ADJ configuration. | Eliminates external feedback resistors but lacks adjustability; suited for fixed-rail systems only. | Select when 1.5 V is required and board space for resistors must be minimized. |
| TPS62303YZD | Fixed 1.8 V output; same CSP-8 package and feature set, but no ADJ pin functionality and different FB voltage threshold. | Optimized for 1.8 V I/O or memory rails; not suitable for dynamically scaled or processor-core supplies. | Choose for cost-sensitive 1.8 V applications where adjustability and sequencing are unnecessary. |
Compared with TPS62320YZDT, TPS62321YZD offers plug-compatible replacement for 1.5 V fixed-rail use with identical thermal and layout behavior, while TPS62303YZD provides a lower-BOM-cost option for 1.8 V applications but forfeits voltage programmability and active power-down sequencing.
Availability
TPS62320YZDT is available at Aetrix Electronics and suitable for smartphone power management, portable medical monitors, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and consistent CSP-8 packaging.
Supply support for TPS62320YZDT 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 designed specifically for ultra-compact, battery-powered portable electronics, emphasizing minimal solution size, high light-load efficiency, and seamless integration with low-voltage processors and RF subsystems.
FAQ
What is the recommended inductor value for TPS62320YZDT in a typical 3.6 V to 1.8 V application?
The TPS62320YZDT datasheet specifies optimal performance with a 1-µH shielded inductor (e.g., FDK MIPW3226 series) for 3.6 VIN/1.8 VOUT operation. This value balances ripple current, transient response, and physical size while maintaining >90% efficiency. Larger values (e.g., 2.2 µH) reduce ripple but degrade load transient performance; smaller values increase ripple and may exceed current limits.
Does TPS62320YZDT support true 100% duty-cycle operation, and how does it benefit battery-powered designs?
Yes, TPS62320YZDT supports 100% duty cycle, allowing VOUT to track VIN with minimal dropout (e.g., 2.8 VOUT from 2.85 VIN). This extends usable battery life in single-cell Li-Ion systems by enabling regulation down to end-of-discharge voltages (~2.7 V), avoiding premature system shutdown.
How does the MODE/SYNC pin function in TPS62320YZDT, and what are the design implications of each mode?
In TPS62320YZDT, MODE/SYNC = GND enables automatic PFM/PWM mode for highest light-load efficiency; MODE/SYNC = VIN forces fixed-frequency PWM for low-noise operation; and an external 3-MHz clock synchronizes switching edges. Each mode affects EMI profile, efficiency curve, and system-level timing coordination-critical for multi-rail portable designs.
Can TPS62320YZDT be used with ceramic output capacitors, and what is the minimum recommended value?
Yes, TPS62320YZDT is fully compatible with X5R/X7R ceramic capacitors. The datasheet recommends ≥4.7 µF at the output for stability and transient performance. Lower values (e.g., 2.2 µF) may cause instability or excessive ripple; higher values improve load transient response but increase inrush current during startup.
What is the purpose of the integrated discharge resistor in TPS62320YZDT, and how does it affect system-level power sequencing?
The integrated 30–50 Ω discharge resistor in TPS62320YZDT actively pulls down VOUT during EN-driven shutdown, ensuring rapid, controlled rail collapse without external components. This eliminates hold-up time and prevents unintended back-powering of upstream circuitry, simplifying power sequencing in multi-rail portable systems.
TPS62320YZDT 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.4V
- 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
TPS62320YZDT FAQ
1.How can I place an order for TPS62320YZDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62320YZDT 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 TPS62320YZDT reliable?
The price and inventory of TPS62320YZDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62320YZDT is usually 5 days.
3.What payment methods are accepted for TPS62320YZDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62320YZDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62320YZDT?
TPS62320YZDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62320YZDT 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 TPS62320YZDT?
For technical support, including TPS62320YZDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62320YZDT requirements.
6.How does Aetrix verify that TPS62320YZDT is sourced from the original manufacturer or authorized distributors?
All TPS62320YZDT 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 TPS62320YZDT meets industry standards.
7.What is the process for return or replacement of TPS62320YZDT?
All TPS62320YZDT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62320YZDT, 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 TPS62320YZDT part is unused and in its original packaging.
Return procedure for TPS62320YZDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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