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Texas Instruments TPS62051DGSRG4
- Part No.:
- TPS62051DGSRG4
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62051DGSRG4.pdf
- Description:
- IC REG BUCK ADJ 800MA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,348
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Product details
Overview
TPS62051DGSRG4 from Texas Instruments is a 10-pin VSSOP synchronous step-down DC-DC converter optimized for battery-powered portable electronics. It delivers up to 800 mA output current with 95% peak efficiency, operates from 2.7 V to 10 V input, supports adjustable 0.7 V–6 V output voltage, and features enhanced low-battery detection (LBI/LBO) for precise undervoltage supervision in single-cell Li-ion systems.
For engineers reviewing the TPS62051DGSRG4 datasheet, TPS62051DGSRG4 pinout, TPS62051DGSRG4 application, or TPS62051DGSRG4 equivalent, key selection considerations include its 12 µA typical quiescent current in power-save mode, 850 kHz nominal switching frequency, 100% duty cycle capability for low-dropout operation, and integrated P/N-channel MOSFETs eliminating external switches.
Technical Context
The TPS62051DGSRG4 implements voltage-mode PWM control with input voltage feed-forward for fast line/load transient response. Its dual-mode operation-forced fixed-frequency PWM (SYNC = HIGH) or automatic PFM/PWM hybrid (SYNC = LOW)-enables noise-sensitive or ultra-low-power system design.
It integrates an enhanced LBI comparator that enables startup only when input exceeds 1.21 V ±1.5%, reducing supply current to 5 µA before full enablement. The device also includes internal soft-start, overtemperature shutdown at 145°C, and open-drain PG/LBO outputs with 250 µs delay and 50 µs/200 µs trip timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 800 mA max - supports high-efficiency power delivery to DSP cores, RF transceivers, or memory subsystems without external current boosting. |
| Input Voltage Range | 2.7 V to 10 V - compatible with 1–2 cell Li-ion (2.7–8.4 V), 3–5 cell alkaline/NiMH (4.5–7.5 V), and industrial 5 V/9 V rails. |
| Quiescent Current | 12 µA typical (PWM/PFM mode) - extends battery runtime in standby or sensor-monitoring states. |
| Switching Frequency | 850 kHz nominal - enables use of compact 10 µH inductors and 10–22 µF ceramic capacitors; synchronizable to 600–1200 kHz. |
| Feedback Reference | 0.5 V - allows precise output regulation via external resistor divider; supports 0.7–6 V adjustable output with ±3% tolerance. |
| LBI Trip Voltage | 1.21 V ±1.5% - enables accurate, programmable battery undervoltage lockout without external supervisor IC. |
| Efficiency Peak | 95% - achieved at mid-load (e.g., 300 mA @ 3.3 V out, 7.2 V in), minimizing thermal dissipation in space-constrained PCBs. |
| Shutdown Current | <2 µA - ensures negligible battery drain during system sleep or off-state. |
Pinout & Package
TPS62051DGSRG4 is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm with 0.5 mm pitch, optimized for high-density portable layouts and thermally efficient board mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Accepts 2.7–10 V supply; connects to input capacitor (10 µF ceramic) and must be decoupled near the pin. |
| LBO (Pin 2) | Open-Drain Output | Asserts low when battery voltage falls below LBI threshold; requires external pullup to VOUT or another rail ≤6 V. |
| GND (Pin 3) | Analog Ground | Reference for feedback, enable, and comparator circuits; must be routed separately from PGND to minimize noise coupling. |
| PG (Pin 4) | Open-Drain Power Good | Signals valid output after 250 µs delay; floats high when VOUT ≥95% of nominal; requires external pullup. |
| FB (Pin 5) | Feedback Input | Sets output voltage via external resistor divider; internal 0.5 V reference enables 0.7–6 V adjustment. |
| LBI (Pin 6) | Low-Battery Input | Monitors scaled battery voltage; triggers LBO and enables enhanced startup sequencing in TPS62051 variant. |
| SYNC (Pin 7) | Mode Control | Pull HIGH for forced PWM (low-noise); pull LOW for auto PFM/PWM (high efficiency); float or tie to GND/VIN for default behavior. |
| EN (Pin 8) | Enable Input | Logic HIGH enables regulator; logic LOW reduces supply current to <2 µA; supports pushbutton interface with external resistor network. |
| SW (Pin 9) | Switch Node | Connects to inductor; carries high di/dt switching current; requires tight layout and Kelvin connection to minimize EMI. |
| PGND (Pin 10) | Power Ground | Return path for high-current switch node; must be connected directly to inductor ground and input/output capacitor grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced LBI Comparator | Enables precise, user-programmable undervoltage startup at 1.21 V ±1.5%, eliminating need for external supervisor IC in battery-critical applications. |
| 100% Duty Cycle Operation | Supports dropout as low as VOUT + RDS(ON)×IOUT (e.g., ~3.35 V at 600 mA), enabling stable regulation near battery end-of-life. |
| Internal Soft-Start | Digital soft-start limits inrush current by stepping switch current limit (200→400→800→1200 mA), preventing input rail collapse on weak sources. |
| Forced Fixed-Frequency PWM | Eliminates frequency modulation noise by locking to external clock (600–1200 kHz) or internal 850 kHz oscillator, simplifying EMI filtering. |
| Overtemperature Protection | Thermal shutdown at 145°C with automatic recovery upon cooling, protecting against sustained overload or poor heatsinking conditions. |
| Integrated Power MOSFETs | On-chip P- and N-channel switches (RDS(ON) ≤850 mΩ / 550 mΩ) reduce BOM count, PCB area, and layout complexity versus controller+external FET solutions. |
Applications
| Cellular Handsets | DSP Power Supply |
|---|---|
Use Scenario: Power management in GSM/UMTS smartphones with single-cell Li-ion battery (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary buck converter supplying core voltage (1.8–2.8 V) to baseband processor and RF transceiver. Use Value: 95% efficiency at 300–600 mA load extends talk time; 12 µA quiescent current preserves standby duration; LBI/LBO enables accurate battery fuel gauging. | Use Scenario: Clean, regulated supply for low-power digital signal processors in portable audio recorders or voice assistants. IC Role / Device Role / Timing Role: Adjustable-output buck regulator delivering 1.2 V or 1.5 V to DSP core with tight transient response. Use Value: 850 kHz switching enables small 10 µH inductor; soft-start prevents brownout during wake-up; PG signal validates rail stability before DSP initialization. |
| Handheld Medical Sensors | Industrial Data Loggers |
Use Scenario: Battery-operated wearable ECG or pulse oximeter requiring long-term continuous monitoring. IC Role / Device Role / Timing Role: Main power stage converting 3.7 V Li-ion to 3.3 V for microcontroller, analog front-end, and BLE radio. Use Value: Enhanced LBI comparator provides reliable low-battery warning at 3.2 V (via resistive divider), triggering graceful shutdown before data loss. | Use Scenario: Remote environmental sensor node powered by primary lithium battery (3.6 V) with multi-year field life requirement. IC Role / Device Role / Timing Role: Ultra-low-quiescent buck converter supplying 2.5 V to MCU and ADC during periodic sampling bursts. Use Value: 5 µA pre-enable current and 12 µA operating IQ minimize average consumption; 100% duty cycle maintains regulation down to 2.55 V input. |
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 | Standard LBI functionality (no enhanced startup sequencing); identical pinout, package, and electrical specs except LBI behavior. | Lacks programmable undervoltage enable; suitable where battery supervision is handled externally or not required. | Select TPS62050DGSR when simplified LBI function suffices and cost optimization is prioritized over precision battery management. |
| TPS62130ARGTR | Higher 3 A output current, 2.95–6 V input range, 2.5 MHz switching, different 16-pin VQFN package; no LBI/LBO pins. | Targeted at higher-power applications with tighter board space constraints; lacks integrated battery monitoring features. | Choose TPS62130ARGTR for systems needing >800 mA or faster transient response, but accept loss of LBI/LBO functionality and redesign of layout/power sequencing. |
Compared with TPS62050DGSR, the TPS62051DGSRG4 adds critical LBI-based startup control for battery safety, while TPS62130ARGTR trades monitoring capability for higher current and frequency-making each optimal for distinct power architecture priorities.
Availability
TPS62051DGSRG4 is available at Aetrix Electronics and suitable for cellular handsets, portable medical sensors, handheld industrial data loggers, and low-power DSP supplies requiring stable component supply across production lifecycles.
Supply support for TPS62051DGSRG4 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 portable battery-powered systems requiring high efficiency across wide load ranges, integrated battery monitoring, and minimal external components-targeting cellular phones, PDAs, and handheld instrumentation.
FAQ
What is the maximum output current supported by the TPS62051DGSRG4?
The TPS62051DGSRG4 supports a maximum continuous output current of 800 mA under recommended operating conditions (TA ≤ 125°C, adequate PCB copper area). This rating assumes proper thermal management and use of specified external components (10 µH inductor, 10 µF input, 22 µF output capacitors). Peak switch current limit is 1.2 A, but sustained delivery beyond 800 mA may trigger thermal shutdown.
How does the enhanced LBI functionality in the TPS62051DGSRG4 differ from standard versions like TPS62050DGSR?
The TPS62051DGSRG4 features an enhanced LBI comparator that enables the device only when input voltage exceeds 1.21 V ±1.5%, reducing supply current to 5 µA prior to full enablement. In contrast, the TPS62050DGSR uses standard LBI functionality where the comparator solely drives LBO without controlling startup sequencing. This makes TPS62051DGSRG4 ideal for precise battery cutoff without external supervisors.
Can the TPS62051DGSRG4 operate with 100% duty cycle, and what is its practical benefit?
Yes, the TPS62051DGSRG4 supports 100% duty cycle operation, allowing output regulation even when input voltage drops to within RDS(ON)×IOUT above VOUT (e.g., ~3.35 V at 600 mA for 3.3 V output). This extends usable battery life in single-cell Li-ion systems by maintaining stable rail voltage down to end-of-discharge, avoiding premature system reset or brownout.
What is the purpose of the SYNC pin on the TPS62051DGSRG4, and how should it be configured?
The SYNC pin on the TPS62051DGSRG4 selects between two operating modes: pulling it HIGH (>1.5 V) forces fixed-frequency PWM for low-noise applications, while pulling it LOW (<0.3 V) enables automatic PFM/PWM mode for highest light-load efficiency. Leaving it unconnected defaults to internal 850 kHz oscillator. External clock synchronization is supported from 600–1200 kHz.
Does the TPS62051DGSRG4 require external MOSFETs, and what are its integrated switch specifications?
No, the TPS62051DGSRG4 integrates both P-channel and N-channel power MOSFETs. Its P-MOSFET has RDS(ON) ≤850 mΩ (at VI = 2.7 V, IO = 300 mA) and N-MOSFET has RDS(ON) ≤550 mΩ (same conditions), eliminating the need for external switches. This integration reduces solution size, component count, and layout complexity compared to controller-only buck ICs.
TPS62051DGSRG4 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:
- Discontinued at Digi-Key
- 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
TPS62051DGSRG4 FAQ
1.How can I place an order for TPS62051DGSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62051DGSRG4 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 TPS62051DGSRG4 reliable?
The price and inventory of TPS62051DGSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62051DGSRG4 is usually 5 days.
3.What payment methods are accepted for TPS62051DGSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62051DGSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62051DGSRG4?
TPS62051DGSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62051DGSRG4 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 TPS62051DGSRG4?
For technical support, including TPS62051DGSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62051DGSRG4 requirements.
6.How does Aetrix verify that TPS62051DGSRG4 is sourced from the original manufacturer or authorized distributors?
All TPS62051DGSRG4 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 TPS62051DGSRG4 meets industry standards.
7.What is the process for return or replacement of TPS62051DGSRG4?
All TPS62051DGSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62051DGSRG4, 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 TPS62051DGSRG4 part is unused and in its original packaging.
Return procedure for TPS62051DGSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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