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Texas Instruments TPS62351YZGR
- Part No.:
- TPS62351YZGR
- Manufacturer:
- Texas Instruments
- Package:
- 12-UFBGA, DSBGA
- Datasheet:
-
TPS62351YZGR.pdf
- Description:
- IC REG BUCK ADJ 800MA 12DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,668
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Product details
Overview
TPS62351YZGR 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 TPS62351YZGR datasheet, TPS62351YZGR pinout, TPS62351YZGR application, or TPS62351YZGR equivalent, key selection criteria include I²C programmability (up to 3.4 Mbps), 10-pin QFN (3×3 mm) package thermal performance (θJA = 89°C/W), SmartReflex™ compliance, and transient-optimized power-save mode for battery-powered handheld devices.
Technical Context
The TPS62351YZGR integrates a 6-bit DAC, dual-mode PFM/PWM control logic, and a 3-MHz oscillator with PLL-based synchronization capability. Its internal power stage uses complementary P-channel and N-channel MOSFETs with rDS(on) of 250–500 mΩ (P-MOS) and 150–350 mΩ (N-MOS) at 3.6 V.
It features dual power-save modes-Light PFM for ultra-low quiescent current (28 µA typical) and Fast PFM for improved load transient response-and supports external clock synchronization via SYNC pin while maintaining ±2% output voltage accuracy across 0–800 mA load range.
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 with UVLO at 2.3 V. |
| Output Current | 800 mA max - sufficient for DSP/processor core rails in smartphones and PDAs. |
| Switching Frequency | 3 MHz fixed - enables use of sub-1-µH inductors and compact 1-mm profile designs. |
| I²C Interface Speed | Up to 3.4 Mbps - compatible with High-Speed I²C mode for fast dynamic voltage scaling. |
| Output Voltage Range | 0.9 V to 1.6875 V - programmable in 12.5-mV steps via 6-bit DAC for precise core voltage tuning. |
| Quiescent Current | 28 µA typical in Light PFM - extends battery life during low-power standby states. |
| Thermal Resistance | θJA = 89°C/W (YZG package) - defines maximum power dissipation (1100 mW at TA = 25°C) and ambient derating requirements. |
Pinout & Package
TPS62351YZGR is packaged in a 10-pin QFN (3 mm × 3 mm, 0.5 mm pitch) with exposed PowerPAD™ thermally connected to PGND. The package supports high-density PCB layouts and efficient heat transfer to internal ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Power input supply | High-current path for output stage; requires local 10-µF ceramic bypass capacitor. |
| AVIN | Analog input supply | Provides bias for control circuitry; must be decoupled separately from PVIN. |
| EN | Enable input | Active-high logic control; rising edge resets internal registers to default values. |
| VSEL | Mode select input | Hardware-selectable active/sleep mode; overrides I²C-controlled mode when asserted. |
| SDA | I²C bidirectional data | Open-drain interface supporting Fast/Standard/High-Speed I²C up to 3.4 Mbps. |
| SCL | I²C clock input | Drives serial communication timing; requires external pull-up resistor. |
| FB | Feedback sense input | Resistive divider connection point for output voltage regulation; 0.4-V internal reference. |
| AGND | Analog ground | Reference for control circuitry; must be star-connected to PGND under IC body. |
| PGND | Power ground | Return path for high-switching-current loop; connects internally to PowerPAD™. |
| SW | Switch node | Drain connection of internal MOSFETs; drives external inductor and impacts EMI layout. |
Key Features
| Feature | Design Value |
|---|---|
| I²C programmability | 6-bit DAC enables 12.5-mV output voltage steps and real-time DVS for OMAP™/XSCALE™ processors. |
| Transient-optimized PFM | Fast PFM mode reduces output voltage deviation during sudden load steps in smartphone CPU burst modes. |
| Efficiency-optimized PFM | Light PFM maintains >80% efficiency at 1-mA loads, critical for always-on subsystems. |
| 3-MHz fixed-frequency PWM | Enables consistent EMI filtering and predictable inductor sizing without frequency jitter. |
| SmartReflex™ compliance | Meets TI's adaptive voltage scaling protocol for dynamic power management in mobile SoCs. |
Applications
| Mobile Phone Core Supply | Smartphone Application Processor Rail |
|---|---|
Use Scenario: Powering ARM-based application processors (e.g., OMAP™) during active and idle states in 3G/4G handsets. IC Role / Device Role / Timing Role: Primary core voltage regulator with I²C-controlled DVS and Fast PFM transient response. Use Value: Enables 12.5-mV fine-grained voltage scaling to match processor DVFS states, reducing dynamic power by up to 30%. | Use Scenario: Delivering stable 1.10 V or 1.50 V core voltage to XSCALE™-based smartphones under varying RF/baseband loading. IC Role / Device Role / Timing Role: Synchronous buck converter with 35-ns minimum on-time supporting low-VIN, high-VOUT ratios. Use Value: Maintains regulation during 200-mA load transients with <30 mVPP ripple in Light PFM mode. |
| PDA DSP Power Management | Digital Camera Image Sensor Bias |
Use Scenario: Supplying split-rail power to low-voltage DSPs in handheld computers requiring dual-mode PFM/PWM operation. IC Role / Device Role / Timing Role: Dual-mode DC-DC regulator with hardware VSEL pin enabling seamless transition between active and sleep states. Use Value: Achieves 28-µA quiescent current in Light PFM, extending battery runtime in standby by >48 hours. | Use Scenario: Providing clean, low-noise 1.35-V bias to CMOS image sensors during video capture in compact digital cameras. IC Role / Device Role / Timing Role: High-frequency buck converter with 3-MHz switching minimizing interference with sensor analog front-end. Use Value: Delivers 88% peak efficiency at 3.6-V input and 1.35-V output, reducing thermal load in sealed camera modules. |
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 |
|---|---|---|---|
| TPS62350YZGR | Default output voltage 1.05 V (vs. 1.10 V); output range 0.75–1.5375 V (vs. 0.9–1.6875 V). | Optimized for lower-core-voltage DSPs; lacks 1.50-V default setting required for some XSCALE™ variants. | Select when target SoC requires 1.05-V nominal core rail and tighter low-end voltage granularity. |
| TPS62352YZGR | Default output voltage 1.20 V; output range 0.75–1.4375 V; no 1.50-V support. | Suitable for mid-range processors with 1.2-V core; incompatible with 1.5-V FPGA I/O or memory interfaces. | Choose for cost-sensitive PDA designs where 1.2-V core is standard and 1.5-V headroom is unnecessary. |
Compared with TPS62350YZGR and TPS62352YZGR, the TPS62351YZGR uniquely supports both 1.10-V and 1.50-V default outputs within its broader 0.9–1.6875-V programmable range, making it the only variant qualified for dual-role OMAP™/XSCALE™ platforms requiring flexible core voltage selection without firmware reconfiguration.
Availability
TPS62351YZGR is available at Aetrix Electronics and suitable for mobile phone core supplies, smartphone application processor rails, and PDA DSP power management requiring stable component supply across extended production lifecycles.
Supply support for TPS62351YZGR 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 and embedded processing technologies, with leadership in power management ICs for portable electronics.
The TPS6235x product line was designed specifically for battery-powered handheld devices requiring high-efficiency, small-footprint DC-DC conversion with intelligent voltage scaling via I²C.
FAQ
What is the default output voltage of the TPS62351YZGR?
The TPS62351YZGR has a factory-default output voltage of 1.10 V, with programmable range spanning 0.9 V to 1.6875 V in 12.5-mV increments via its 6-bit I²C DAC. This default setting is confirmed in the Ordering Information table and supports common core voltages for XSCALE™ processors without requiring initial register writes.
Does the TPS62351YZGR support external clock synchronization?
Yes, the TPS62351YZGR supports external clock synchronization through its dedicated SYNC pin, accepting input frequencies from 2.65 MHz to 3.35 MHz. When enabled, the internal 3-MHz oscillator locks to the external signal, allowing system-level clock domain alignment and EMI reduction in multi-rail power architectures.
What is the thermal performance difference between the YZG and DRC packages for the TPS62351YZGR?
The TPS62351YZGR uses the YZG (10-pin QFN) package with θJA = 89°C/W, whereas the DRC (10-pin QFN) variant has θJA = 49°C/W. This means the YZG package dissipates less power at the same ambient temperature - 1100 mW at 25°C vs. 2050 mW for DRC - requiring more careful thermal design in high-load, enclosed applications.
Can the TPS62351YZGR operate with input voltage below 2.7 V?
No, the TPS62351YZGR has a specified minimum input voltage of 2.7 V per Recommended Operating Conditions. Below this threshold, undervoltage lockout activates at 2.3 V (typical), disabling the device. Operation below 2.7 V is not guaranteed and may result in unstable regulation or failure to start.
How does the TPS62351YZGR handle power-down sequencing?
The TPS62351YZGR incorporates an internal 15-Ω discharge resistor (RDIS) connected to the SW node, which actively discharges the output capacitor during shutdown. This ensures controlled power-down without external components, preventing back-powering of upstream circuits and meeting SmartReflex™-compliant sequencing requirements.
TPS62351YZGR 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
TPS62351YZGR FAQ
1.How can I place an order for TPS62351YZGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62351YZGR 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 TPS62351YZGR reliable?
The price and inventory of TPS62351YZGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62351YZGR is usually 5 days.
3.What payment methods are accepted for TPS62351YZGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62351YZGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62351YZGR?
TPS62351YZGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62351YZGR 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 TPS62351YZGR?
For technical support, including TPS62351YZGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62351YZGR requirements.
6.How does Aetrix verify that TPS62351YZGR is sourced from the original manufacturer or authorized distributors?
All TPS62351YZGR 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 TPS62351YZGR meets industry standards.
7.What is the process for return or replacement of TPS62351YZGR?
All TPS62351YZGR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62351YZGR, 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 TPS62351YZGR part is unused and in its original packaging.
Return procedure for TPS62351YZGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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