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Texas Instruments TPS62351YZGT
- Part No.:
- TPS62351YZGT
- Manufacturer:
- Texas Instruments
- Package:
- 12-UFBGA, DSBGA
- Datasheet:
-
TPS62351YZGT.pdf
- Description:
- IC REG BUCK ADJ 800MA 12DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,381
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Product details
Overview
TPS62351YZGT from Texas Instruments is a 3-MHz synchronous step-down DC-DC converter with I²C-compatible interface, delivering up to 800 mA output current at 2.7 V input, ±2% PWM DC voltage accuracy, and 35 ns minimum on-time. It supports dynamic voltage scaling down to 0.6 V and operates in Light PFM, Fast PFM, or Forced PWM modes for mobile phone core power supplies.
For engineers reviewing the TPS62351YZGT datasheet, TPS62351YZGT pinout, TPS62351YZGT application, or TPS62351YZGT equivalent, key selection factors include its 12-pin NanoFree™ CSP package, I²C programmability up to 3.4 Mbps, 28 µA quiescent current in Light PFM mode, and SmartReflex™ compliance for adaptive power management in battery-powered handheld devices.
Technical Context
The TPS62351YZGT integrates a 6-bit DAC, dual MOSFET power stage (P-channel rDS(on) = 250–500 mΩ, N-channel rDS(on) = 150–350 mΩ), and PLL-based 3-MHz oscillator with synchronization capability. Its feedback loop uses a 0.4 V internal reference and supports external resistor divider configuration via FB pin.
It implements two distinct power-save modes: Light PFM for ultra-low quiescent current (28 µA) and Fast PFM for improved transient response, both selectable via I²C or VSEL pin. The device enters shutdown (<2 µA) when EN is pulled low and features thermal shutdown at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion battery operation across full discharge curve. |
| Output Current | 800 mA - sufficient for DSP/processor core rails in smartphones and PDAs. |
| Switching Frequency | 3 MHz fixed - enables use of compact 1 µH inductors and 10 µF ceramic capacitors. |
| Output Voltage Range | 0.9 V to 1.6875 V - programmable in 12.5 mV steps via I²C for precise core voltage tuning. |
| Quiescent Current | 28 µA in Light PFM - extends battery life during light-load standby states. |
| Efficiency | 88% at 3 MHz - maintains high conversion efficiency without forced PWM, critical for thermal-limited handheld enclosures. |
| I²C Speed | Up to 3.4 Mbps - supports high-speed dynamic voltage scaling in SmartReflex™ systems. |
Pinout & Package
TPS62351YZGT is packaged in a 12-pin NanoFree™ chip-scale package (CSP-12), measuring 1.6 mm × 1.6 mm with 0.4 mm pitch, optimized for ultra-thin portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Power input supply | High-current path for power-stage MOSFETs; requires local 10 µF ceramic bypass capacitor. |
| AVIN | Analog input supply | Provides bias for control circuitry; must be decoupled separately from PVIN to reduce noise coupling. |
| EN | Enable input | Active-high logic control; rising edge resets all registers to default values and initiates startup sequence. |
| VSEL | Mode select input | Hardware-selectable between active (HIGH) and sleep (LOW) modes; overrides I²C mode settings when asserted. |
| SDA / SCL | I²C bidirectional data / clock | Support Fast/Standard/High-Speed I²C modes; used for dynamic voltage scaling, mode reconfiguration, and status readback. |
| FB | Feedback sense input | Connects to output via resistor divider; sets regulated output voltage using internal 0.4 V reference. |
| SYNC | External clock sync input | Allows synchronization to system clock source (2.65–3.35 MHz); eliminates beat frequencies in multi-rail systems. |
| SW | Switch node | Drain connection of internal P/N-MOSFET pair; connects directly to inductor and requires careful layout for EMI control. |
| AGND / PGND | Analog / power ground | Separate ground pins minimize noise coupling; must be joined under IC via thermal pad or short trace. |
Key Features
| Feature | Design Value |
|---|---|
| SmartReflex™ Compliance | Enables closed-loop adaptive voltage scaling with OMAP™/XSCALE™ processors to reduce dynamic power by >20% in real-world workloads. |
| Split-Supply Support | Independent AVIN/PVIN rails allow separate low-noise analog supply and high-current power supply, improving PSRR and ADC performance. |
| Transient-Optimized Power-Save Mode | Fast PFM mode delivers <10 µs load-step recovery time while maintaining >80% efficiency at 1–100 mA loads. |
| On-the-Fly Synchronization | SYNC pin accepts external clock without requiring device reset, enabling seamless frequency alignment in multi-converter systems. |
| 1-mm Component Profile | Entire solution (IC + 1 µH inductor + 10 µF caps) fits within 1 mm height, meeting strict Z-height requirements for slim smartphones. |
Applications
| Mobile Phone Core Supply | Smartphone DSP Power Rail |
|---|---|
Use Scenario: Powering ARM Cortex-A8 core in a 3G smartphone powered by single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary buck regulator providing dynamically scaled core voltage (0.9–1.35 V) under SmartReflex™ control. Use Value: Enables 30% reduction in active-core power versus fixed-voltage solutions, extending talk time by 45 minutes per charge cycle. | Use Scenario: Supplying TI C64x+ DSP in multimedia-enabled PDA with burst-mode video decoding. IC Role / Device Role / Timing Role: High-transient-response buck converter delivering 1.1 V at up to 800 mA with <15 µs load-step recovery. Use Value: Prevents DSP brownout during 500 mA load transients, eliminating frame drops in 720p video playback. |
| Handheld Computer SoC Rail | Digital Camera Image Processor |
Use Scenario: Generating 1.2 V core rail for Intel XScale PXA320 processor in ruggedized handheld computer. IC Role / Device Role / Timing Role: I²C-programmable buck converter synchronized to system clock to suppress switching noise in touch-screen ADC. Use Value: Reduces conducted EMI by 12 dB compared to unsynchronized 3-MHz operation, ensuring touch accuracy >99.5%. | Use Scenario: Powering CMOS image sensor and ISP in compact digital camera with 2.8 V nominal battery. IC Role / Device Role / Timing Role: Ultra-low-quiescent buck supplying 1.5 V at 300 mA with Light PFM mode during standby imaging intervals. Use Value: Achieves 28 µA quiescent current, reducing standby power by 65% versus standard PWM-only converters. |
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 |
|---|---|---|---|
| TPS62352YZG | Fixed default output of 1.20 V (vs. 1.50 V for TPS62351YZGT); identical I²C interface, package, and electrical specs. | Targeted for lower-voltage SoC cores where 1.2 V is required without software reprogramming. | Select when fixed 1.2 V simplifies firmware and eliminates need for I²C initialization at boot. |
| TPS62353YZG | Default output voltage 1.20 V; same 0.75–1.5375 V programmable range, but different factory-set VSEL0/VSEL1 bits affecting startup behavior. | Suitable for systems requiring identical functionality but with alternate I²C address or register defaults. | Choose when board-level I²C bus addressing conflicts require alternate slave address (A0/A1 bit combination). |
Compared with TPS62352YZG and TPS62353YZG, the TPS62351YZGT provides a higher factory-default output (1.50 V) ideal for DSPs requiring margin above 1.35 V nominal, while retaining full I²C programmability and identical thermal performance in the YZG CSP-12 package.
Availability
TPS62351YZGT is available at Aetrix Electronics and suitable for mobile phones, smart-phones, and digital cameras requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for TPS62351YZGT 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 company specializing in analog, embedded processing, and power management technologies, serving automotive, industrial, and consumer markets.
The TPS6235x product line was designed specifically for battery-powered portable electronics requiring high-efficiency, ultra-small-footprint DC-DC conversion with intelligent power management interfaces like I²C and SmartReflex™.
FAQ
What is the default output voltage of the TPS62351YZGT?
The TPS62351YZGT has a factory-default output voltage of 1.50 V, programmable via I²C interface from 0.9 V to 1.6875 V in 12.5 mV steps. This default value is set by internal VSEL0/VSEL1 register bits and remains active until overwritten by host controller communication.
Does the TPS62351YZGT support external clock synchronization?
Yes, the TPS62351YZGT supports external clock synchronization via the SYNC pin, accepting input frequencies from 2.65 MHz to 3.35 MHz. This allows alignment of switching edges across multiple converters to reduce beat frequencies and system-level EMI without requiring device reset or register reconfiguration.
What package type is used for the TPS62351YZGT?
The TPS62351YZGT uses the YZG package - a 12-pin NanoFree™ chip-scale package (CSP-12) with 1.6 mm × 1.6 mm footprint and 0.4 mm ball pitch. It features integrated thermal pad connected to PGND for enhanced power dissipation in space-constrained portable designs.
How does the TPS62351YZGT manage efficiency at light loads?
The TPS62351YZGT employs two power-save modes: Light PFM for ultra-low quiescent current (28 µA) and Fast PFM for improved transient response. Both modes automatically engage below ~10 mA load, maintaining >80% efficiency while minimizing idle power draw in battery-operated standby states.
Is the TPS62351YZGT compatible with SmartReflex™ technology?
Yes, the TPS62351YZGT is explicitly designed as a SmartReflex™-compliant power supply. It supports dynamic voltage and frequency scaling (DVFS) through its I²C interface, enabling real-time core voltage adjustment in coordination with OMAP™ and XSCALE™ processors to optimize power-performance trade-offs.
TPS62351YZGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.9V (1.1V, 1.5V)
- Voltage - Output (Max):
- 1.69V
- Current - Output:
- 800mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA
TPS62351YZGT FAQ
1.How can I place an order for TPS62351YZGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62351YZGT 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 TPS62351YZGT reliable?
The price and inventory of TPS62351YZGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62351YZGT is usually 5 days.
3.What payment methods are accepted for TPS62351YZGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62351YZGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62351YZGT?
TPS62351YZGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62351YZGT 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 TPS62351YZGT?
For technical support, including TPS62351YZGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62351YZGT requirements.
6.How does Aetrix verify that TPS62351YZGT is sourced from the original manufacturer or authorized distributors?
All TPS62351YZGT 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 TPS62351YZGT meets industry standards.
7.What is the process for return or replacement of TPS62351YZGT?
All TPS62351YZGT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62351YZGT, 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 TPS62351YZGT part is unused and in its original packaging.
Return procedure for TPS62351YZGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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