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Texas Instruments TPS62051DGS
- Part No.:
- TPS62051DGS
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62051DGS.pdf
- Description:
- IC REG BUCK ADJ 800MA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,831
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Product details
Overview
TPS62051DGS from Texas Instruments is a 800-mA synchronous step-down DC-DC converter in a 10-pin VSSOP (DGS) package, featuring adjustable 0.7 V to 6 V output, 12 µA typical quiescent current, 850 kHz fixed switching frequency, and enhanced low-battery input (LBI) comparator for precise undervoltage supervision - used in battery-powered handheld devices requiring high light-load efficiency and programmable shutdown.
For engineers reviewing the TPS62051DGS datasheet, TPS62051DGS pinout, TPS62051DGS application, or TPS62051DGS equivalent, key selection criteria include its 2.7 V–10 V input range, 100% duty cycle capability for low-dropout operation, forced-PWM/PSM mode control via SYNC pin, integrated P/N-channel MOSFETs, and LBI-triggered 5 µA ultra-low-power enable sequencing.
Technical Context
The TPS62051DGS implements voltage-mode PWM control with input voltage feed-forward for fast line/load transient response, using an internal 0.5 V reference and digital soft-start that ramps switch current in 200 mA steps. Its enhanced LBI circuit enables the device only when input exceeds 1.21 V ±1.5%, reducing supply current to 5 µA before full enable.
It operates in forced-PWM mode when SYNC ≥1.5 V (enabling low-noise fixed-frequency operation up to 1.2 MHz), or enters power-save PFM mode when SYNC ≤0.3 V - achieving up to 95% efficiency across 10 µA–800 mA load range while maintaining <2 µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 800 mA max - supports compact 10 µH inductor and 22 µF output capacitor designs for portable loads. |
| Input Voltage Range | 2.7 V to 10 V - compatible with single/dual Li-ion, 3–5-cell alkaline/NiMH battery inputs. |
| Quiescent Current | 12 µA typical - enables >1000-hour standby in always-on battery systems without LBI activation. |
| Switching Frequency | 850 kHz typical - allows use of small ceramic inductors (e.g., 10 µH) and minimizes EMI filtering area. |
| Feedback Reference | 0.5 V - enables precise output regulation down to 0.7 V using external resistor divider. |
| LBI Trip Voltage | 1.21 V ±1.5% - provides accurate, user-programmable battery undervoltage lockout without external supervisor. |
| Shutdown Current | <2 µA - ensures minimal battery drain during system sleep or off-state. |
| Duty Cycle Range | 100% max - supports dropout as low as (VO + RDS(ON) × IO), critical for low-VIN applications. |
Pinout & Package
TPS62051DGS is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm with exposed thermal pad (PGND-connected), optimized for space-constrained portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.7–10 V supply; connects to 10 µF input capacitor and internal bias rails. |
| LBO (Pin 2) | Open-drain output | Asserts low when LBI voltage falls below 1.21 V; requires external pullup to VOUT or ≤6 V rail. |
| GND (Pin 3) | Analog ground | Reference for FB, PG, LBI; must be separated from PGND in high-current layouts. |
| PG (Pin 4) | Open-drain status | Floats high when VOUT ≥95% nominal; sinks ≥1 mA; requires external pullup to VOUT. |
| FB (Pin 5) | Feedback input | Connects to resistor divider for adjustable output; internal 0.5 V reference sets VO = 0.5 × (1 + R1/R2). |
| LBI (Pin 6) | Low-battery sense | Enhanced comparator input for TPS62051; triggers 5 µA standby-to-enable transition at 1.21 V. |
| SYNC (Pin 7) | Mode control | Pull ≥1.5 V for forced PWM; pull ≤0.3 V for PFM; float or tie to GND/VIN for auto-select. |
| EN (Pin 8) | Enable input | Logic high enables converter; logic low reduces supply current to <2 µA; hysteresis = 100 mV. |
| SW (Pin 9) | Switch node | Drives external 10 µH inductor; connects internally to P/N-MOSFET drains; handles 800 mA peak current. |
| PGND (Pin 10) | Power ground | High-current return path for SW and internal MOSFETs; must connect directly to thermal pad and input/output caps. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced LBI Comparator | Enables device only when battery voltage exceeds 1.21 V, reducing pre-enable current to 5 µA - eliminates need for external SVS IC. |
| 100% Duty Cycle Operation | Maintains regulation down to VIN ≈ VOUT + (RDS(ON)_P × IO), extending usable battery life in deep-discharge conditions. |
| Programmable Mode Control | SYNC pin selects between low-noise fixed-frequency PWM (≥600 kHz) or high-efficiency PFM - enabling dynamic power management. |
| Digital Soft-Start | Ramps switch current in discrete 200 mA steps (200→400→800→1200 mA), limiting inrush and preventing input droop on weak sources. |
| Integrated Power MOSFETs | On-chip P/N-channel switches eliminate external FETs and drivers - reducing BOM count and layout complexity. |
| Thermal Shutdown Protection | Halts switching at 145°C junction temperature and auto-restarts upon cooling - prevents damage during overload or poor heatsinking. |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
Use Scenario: Powering baseband processor core voltage (1.2–1.8 V) from single Li-ion cell (3.0–4.2 V) with dynamic load steps. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 1.5 V @ 600 mA with <100 µs transient response. Use Value: 93% efficiency at 200 mA load extends talk time; 12 µA quiescent current preserves standby battery life over weeks. | Use Scenario: Supplying image sensor and ISP logic rails (2.5–3.3 V) during burst capture with intermittent 800 mA peaks. IC Role / Device Role / Timing Role: High-current step-down converter with 100% duty cycle support for low-VIN brownout recovery. Use Value: Maintains stable output during battery sag to 3.0 V; PFM mode reduces idle power by 70% vs. fixed-frequency operation. |
| Handheld Medical Monitors | Industrial PDAs |
Use Scenario: Providing isolated analog front-end supply (3.3 V) from 3.6 V primary battery with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise power source operating in forced-PWM mode synchronized to system clock (850 kHz). Use Value: Fixed switching frequency enables predictable EMI filtering; 0.5 V FB reference ensures ±1% output accuracy over temperature. | Use Scenario: Regulating DSP I/O voltage (1.8 V) in ruggedized PDA with wide ambient temperature (–40°C to 85°C). IC Role / Device Role / Timing Role: Robust DC-DC converter with overtemperature and overcurrent protection active across full industrial range. Use Value: Thermal shutdown at 145°C prevents field failure; 154°C/W RθJA enables operation without heatsink in sealed enclosures. |
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 |
|---|---|---|---|
| TPS62050DGS | Same package and pinout; standard (not enhanced) LBI functionality; 12 µA IQ same, but no 5 µA pre-enable state. | Lacks programmable undervoltage enable - requires external supervisor for battery cutoff. | Select when LBI function is unused or implemented externally; lower cost where enhanced LBI is unnecessary. |
| TPS62130ARGTR | 3-MHz switching, 95% efficiency, 2.7–6.5 V input, 1.2-A output; WSON-10 package; no LBI/LBO pins. | Higher frequency enables smaller magnetics; lacks battery monitoring features entirely. | Select for space-constrained designs needing higher output current and faster transients, where battery supervision is handled elsewhere. |
Compared with TPS62050DGS, the TPS62051DGS adds precision LBI-triggered enable sequencing at identical footprint and cost premium; versus TPS62130ARGTR, it trades higher frequency and current for integrated battery monitoring and ultra-low-quiescent standby - making it optimal for long-life battery systems with voltage supervision requirements.
Availability
TPS62051DGS is available at Aetrix Electronics and suitable for cellular handsets, digital cameras, handheld medical monitors, and industrial PDAs requiring stable component supply, long-term manufacturability, and qualified automotive-grade alternatives.
Supply support for TPS62051DGS 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TPS6205x product line delivers high-efficiency, low-quiescent-current synchronous buck converters optimized for battery-powered portable equipment with stringent size, efficiency, and supervision requirements.
FAQ
What is the minimum input voltage required for TPS62051DGS to regulate a 1.5-V output?
The TPS62051DGS supports 100% duty cycle operation, enabling regulation as long as VIN ≥ VOUT + (RDS(ON)_P × IO). At 600 mA load and worst-case RDS(ON)_P = 0.85 Ω (VI = 2.7 V), minimum VIN ≈ 1.5 V + 0.51 V = 2.01 V. However, recommended minimum is 2.7 V per datasheet operating conditions - below which performance is not guaranteed. The TPS62051DGS maintains regulation down to ~2.3 V input in practical 1.5-V designs with proper layout.
How does the enhanced LBI functionality of TPS62051DGS differ from standard LBI in TPS62050DGS?
The TPS62051DGS uses enhanced LBI to gate full device enable: when EN is high but LBI < 1.21 V, only the bandgap reference remains active, drawing just 5 µA - no switching occurs. In contrast, TPS62050DGS applies standard LBI only as an open-drain warning (LBO), with full operation enabled solely by EN. This makes TPS62051DGS ideal for battery cutoff without external supervisors.
Can TPS62051DGS operate without an external feedback resistor divider?
No - the TPS62051DGS is the adjustable version of the family and requires an external resistor divider from VOUT to FB and FB to GND to set output voltage. Its internal feedback divider is disabled. Fixed-output variants like TPS62052DGS (1.5 V) or TPS62056DGS (3.3 V) omit the FB pin connection and use internal dividers - but TPS62051DGS mandates external resistors to achieve its 0.7–6 V adjustability.
What is the purpose of the PG pin on TPS62051DGS, and how should it be connected?
PG is an open-drain power-good indicator that floats high when VOUT reaches ≥95% of nominal value. It requires an external pullup resistor (typically 10–100 kΩ) to VOUT or another stable rail ≤6 V. PG is inactive (pulled low) during startup, shutdown, or if VOUT drops out of regulation. It signals host processors or PMICs that the rail is stable - critical for sequenced power-up in multi-rail systems using TPS62051DGS.
Does TPS62051DGS support synchronization to external clock frequencies outside the 600–1200 kHz range?
No - the TPS62051DGS synchronizes only to external clocks between 600 kHz and 1200 kHz, as specified in its electrical characteristics. Attempting synchronization outside this range may cause erratic switching, loss of regulation, or failure to lock. Below 600 kHz, the internal oscillator dominates; above 1200 kHz, the SYNC input ignores the signal and defaults to 850 kHz operation. For reliable fixed-frequency control, keep external clocks within the validated 600–1200 kHz window.
TPS62051DGS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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
TPS62051DGS FAQ
1.How can I place an order for TPS62051DGS through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62051DGS 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 TPS62051DGS reliable?
The price and inventory of TPS62051DGS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62051DGS is usually 5 days.
3.What payment methods are accepted for TPS62051DGS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62051DGS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62051DGS?
TPS62051DGS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62051DGS 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 TPS62051DGS?
For technical support, including TPS62051DGS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62051DGS requirements.
6.How does Aetrix verify that TPS62051DGS is sourced from the original manufacturer or authorized distributors?
All TPS62051DGS 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 TPS62051DGS meets industry standards.
7.What is the process for return or replacement of TPS62051DGS?
All TPS62051DGS units undergo pre-shipment inspection (PSI). If there is an issue with TPS62051DGS, 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 TPS62051DGS part is unused and in its original packaging.
Return procedure for TPS62051DGS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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