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Texas Instruments TPS62051DGSR
- Part No.:
- TPS62051DGSR
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62051DGSR.pdf
- Description:
- IC REG BUCK ADJ 800MA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,238
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Product details
Overview
TPS62051DGSR from Texas Instruments is an adjustable-output, 800-mA synchronous step-down DC-DC converter in a 10-pin VSSOP package. It operates from 2.7 V to 10 V input, delivers 0.7 V to 6 V output, achieves up to 95% efficiency, and features 12 µA quiescent current - enabling long battery life in portable Li-Ion/NiMH-powered systems such as handheld PCs and low-power DSP supplies.
For engineers reviewing the TPS62051DGSR datasheet, TPS62051DGSR pinout, TPS62051DGSR application, or TPS62051DGSR equivalent, key selection criteria include its enhanced LBI comparator (5 µA shutdown current), SYNC-controlled PWM/PSM mode switching, 850 kHz fixed-frequency operation, and 100% duty cycle capability for ultra-low dropout performance.
Technical Context
The TPS62051DGSR implements voltage-mode PWM control with input voltage feed-forward for fast line/load transient response. Its integrated N- and P-channel MOSFETs enable synchronous rectification, eliminating external diodes and improving efficiency across load range.
It supports dual operating modes: forced PWM (SYNC = HIGH) for low-noise, fixed-frequency operation up to 1.2 MHz, and power-save mode (SYNC = LOW) that reduces switching frequency and quiescent current to 12 µA at light loads - maintaining >85% efficiency down to 1 mA output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 10 V - supports single/dual Li-Ion or 3–5-cell alkaline/NiMH battery inputs without pre-regulation. |
| Output Voltage Range | 0.7 V to 6 V (adjustable via external resistor divider) - enables precise rail generation for core logic, I/O, or analog circuitry. |
| Max Output Current | 800 mA - sufficient for powering microcontrollers, FPGAs, and low-power DSPs with margin for peak transients. |
| Quiescent Current | 12 µA (typical, PSM mode) - extends battery runtime in always-on or sleep-state applications. |
| Switching Frequency | 850 kHz (internal oscillator); 600–1200 kHz (externally synchronized) - allows compact 10 µH inductor and 22 µF ceramic output capacitor design. |
| LBI Comparator | Enhanced 1.21 V ±1.5% trip point with 5 µA shutdown current - enables precise, self-contained battery undervoltage lockout without external supervisor IC. |
| Duty Cycle Range | 100% maximum - supports operation with minimal input-to-output differential (e.g., 3.3 V out from 3.6 V input). |
Pinout & Package
TPS62051DGSR is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2.7–10 V supply; connects to input capacitor (10 µF typical) and must be decoupled near the pin. |
| EN | Enable control | Logic-high enables regulation; logic-low reduces supply current to <2 µA - supports system-level power sequencing. |
| LBI | Low-battery input | Enhanced comparator input (TPS62051-specific); sets precise undervoltage shutdown threshold at 1.21 V. |
| LBO | Low-battery output | Open-drain signal indicating battery voltage below LBI threshold - requires external pullup to VOUT or another rail ≤6 V. |
| GND | Analog ground | Reference for FB, PG, LBI; must be routed separately from PGND to minimize noise coupling. |
| PG | Power good output | Open-drain status flag; floats high when VOUT ≥95% of nominal - used for system reset or sequencing control. |
| FB | Feedback input | Connects to resistor divider for adjustable output; internal reference is 0.5 V - sets output as VOUT = 0.5 × (1 + R1/R2). |
| PGND | Power ground | High-current return path for SW and internal MOSFETs; must be connected to power plane under inductor and output capacitor. |
| SW | Switch node | Drives external 10 µH inductor; experiences high dv/dt - requires tight layout and minimal trace length to reduce EMI. |
| SYNC | Frequency control | Configures operating mode: HIGH forces fixed PWM; LOW enables PFM/PWM auto-switching - enables dynamic efficiency optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced LBI comparator | Enables precise, self-contained battery supervision with only 5 µA quiescent current in shutdown - eliminates need for external SVS IC. |
| 100% duty cycle operation | Permits lowest possible dropout (e.g., 3.3 V out from 3.4 V input), critical for end-of-life battery operation in portable devices. |
| Internal soft-start | Digital ramp limits inrush current during startup - prevents input voltage sag on weak sources like coin cells or aging batteries. |
| Overtemperature & overcurrent protection | Thermal shutdown at 145°C and cycle-by-cycle current limiting (1.2 A typical) ensure robust operation under fault conditions. |
| Forced PWM / PFM mode selection | SYNC pin allows real-time trade-off between low-noise fixed-frequency operation and ultra-low-quiescent power-save mode. |
Applications
| Handheld Computing | Low-Power DSP Supply |
|---|---|
Use Scenario: Powering ARM-based handheld PCs with dynamic CPU voltage scaling and extended battery life requirements. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.2 V core and 3.3 V I/O rails from a single 3.7 V Li-Ion cell. Use Value: 12 µA quiescent current in PSM mode and 100% duty cycle extend usable battery capacity by >15% versus non-synchronous alternatives. | Use Scenario: Supplying TI C5000-series DSPs in battery-operated audio analyzers requiring clean, stable 1.8 V and 2.5 V rails. IC Role / Device Role / Timing Role: Dual-rail generator using two TPS62051DGSRs - one for core, one for I/O - with SYNC synchronized to avoid beat frequencies. Use Value: Forced PWM mode eliminates switching noise near audio band; 93% efficiency at 200 mA ensures minimal thermal rise in sealed enclosures. |
| Cellular Phone Baseband | Digital Camera Sensor Core |
Use Scenario: Regulating baseband processor voltage in GSM/EDGE feature phones with aggressive power cycling. IC Role / Device Role / Timing Role: Main system PMIC buck stage enabling rapid EN-controlled on/off transitions and seamless mode switching between talk/idle/sleep states. Use Value: 1 ms typical start-up time and 250 µs PG assertion delay support sub-10 ms wake-up sequences required by 3GPP power classes. | Use Scenario: Powering CMOS image sensor digital core (1.2 V) and analog front-end (2.8 V) in compact digital cameras. IC Role / Device Role / Timing Role: Adjustable buck converter configured for 1.2 V output with external feedback resistors; LBO monitors main battery health. Use Value: Enhanced LBI comparator provides accurate low-battery warning before sensor corruption occurs - critical for preserving image capture integrity. |
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 |
|---|---|---|---|
| TPS62050DGSR | Same package and pinout; standard (not enhanced) LBI functionality; 20 µA quiescent current in PSM mode vs. 12 µA. | Lacks precision battery supervision - requires external supervisor for undervoltage shutdown. | Select when LBI functionality is unused or implemented externally; lower cost where enhanced LBI is unnecessary. |
| TPS62061DSGR | Smaller 6-pin WSON package; 1.2 V to 5.5 V input; fixed 1.2 V, 1.5 V, 1.8 V, or 2.5 V outputs; 22 µA IQ. | No adjustable output or LBI/LBO pins - designed for simpler, space-constrained applications without battery monitoring. | Select for footprint-sensitive designs needing only fixed output and no battery supervision; not suitable for adjustable or LBI-critical use cases. |
Compared with TPS62050DGSR, the TPS62051DGSR delivers tighter battery monitoring and lower quiescent current, while TPS62061DSGR trades adjustability and supervision for smaller size and lower BOM count - making TPS62051DGSR optimal for battery-aware portable systems requiring both flexibility and precision.
Availability
TPS62051DGSR is available at Aetrix Electronics and suitable for handheld computing, low-power DSP supplies, cellular phone baseband subsystems, and digital camera sensor core regulation requiring stable component supply and long-term production continuity.
Supply support for TPS62051DGSR 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 TPS6205x product line was designed specifically for battery-powered portable electronics - delivering high efficiency across wide load ranges, ultra-low quiescent current, and integrated supervision features to simplify power architecture.
FAQ
What is the minimum input voltage required for TPS62051DGSR to regulate a 1.8 V output?
The TPS62051DGSR supports 100% duty cycle operation, meaning it can maintain regulation as long as VIN ≥ VOUT. For a 1.8 V output, the absolute minimum input is 1.8 V - though practical operation requires margin above this due to voltage drops across PCB traces and input capacitance ESR. The device's undervoltage lockout activates at 1.6 V, ensuring reliable disable below functional input range.
How does the enhanced LBI functionality in TPS62051DGSR differ from standard LBI in TPS62050DGSR?
The TPS62051DGSR's enhanced LBI uses a dedicated low-power comparator path that activates the bandgap reference only when LBI exceeds 1.21 V, reducing shutdown current to 5 µA - versus 20 µA in TPS62050DGSR. This enables true "supervisor-first" behavior: the device remains fully disabled until battery voltage crosses the threshold, eliminating parasitic drain during storage or deep sleep.
Can TPS62051DGSR synchronize to an external clock while in power-save mode?
No - when the TPS62051DGSR is synchronized to an external clock (SYNC = HIGH), power-save (PFM) mode is disabled and the device operates exclusively in forced PWM mode. To enable automatic PFM/PWM transition, SYNC must be pulled low (to GND). External synchronization and power-save mode are mutually exclusive operating configurations per the device's functional architecture.
What is the recommended output capacitor value for stable operation of TPS62051DGSR at 800 mA load?
The datasheet specifies 22 µF ceramic output capacitance (X5R or X7R, 6.3 V rating) as the standard value for stable 800 mA operation with 10 µH inductor. This value ensures adequate phase margin and limits output voltage ripple to <15 mV peak-to-peak. Lower values (e.g., 10 µF) may cause instability under heavy transient loads; higher values improve ripple suppression but increase start-up time and physical footprint.
Does TPS62051DGSR require an external pull-up resistor on the PG pin?
Yes - the PG pin is an open-drain output and must be pulled up to VOUT (or another compatible rail ≤6 V) with a resistor typically between 10 kΩ and 100 kΩ. Without this pull-up, the PG signal cannot assert high to indicate valid output voltage. The datasheet specifies that PG floats when VOUT ≥95% of nominal, so the pull-up establishes the logic-high state necessary for system-level power-good detection.
TPS62051DGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 0.7V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 800mA
- Frequency - Switching:
- 850kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
TPS62051DGSR FAQ
1.How can I place an order for TPS62051DGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62051DGSR 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 TPS62051DGSR reliable?
The price and inventory of TPS62051DGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62051DGSR is usually 5 days.
3.What payment methods are accepted for TPS62051DGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62051DGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62051DGSR?
TPS62051DGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62051DGSR 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 TPS62051DGSR?
For technical support, including TPS62051DGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62051DGSR requirements.
6.How does Aetrix verify that TPS62051DGSR is sourced from the original manufacturer or authorized distributors?
All TPS62051DGSR 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 TPS62051DGSR meets industry standards.
7.What is the process for return or replacement of TPS62051DGSR?
All TPS62051DGSR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62051DGSR, 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 TPS62051DGSR part is unused and in its original packaging.
Return procedure for TPS62051DGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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