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Texas Instruments TPS62102DR
- Part No.:
- TPS62102DR
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS62102DR.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,535
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Product details
Overview
TPS62102DR from Texas Instruments is a 1-MHz synchronous buck DC-DC converter optimized for dual Li-ion battery-powered portable electronics. It operates from 2.5 V to 9 V input, delivers adjustable 0.8 V to 8 V output at up to 500 mA, and features dual-auto-mode switching between constant-frequency PWM and pulsed-variable-frequency (PFM) for peak efficiency across load range - critical in GPS devices and digital still cameras.
For engineers reviewing the TPS62102DR datasheet, TPS62102DR pinout, TPS62102DR application, or TPS62102DR equivalent, this page provides verified technical context on multimode operation, SOIC-8 package integration, light-load transition thresholds (770 mV FB), and real-world design implications of its 1-MHz switching frequency, soft-start timing, and SD/SYNC dual-function control.
Technical Context
The TPS62102DR implements voltage-mode PWM control with an internal 0.8-V reference and integrated N- and P-channel MOSFETs (RDS(on) = 0.6 Ω / 1.0 Ω @ 7.2 V). Its tri-state MODE pin selects forced constant-frequency, forced variable-frequency, or automatic mode - where load-dependent transitions occur between 770 mV (re-entry to PWM) and 785–815 mV (PFM band) at FB.
Its SD/SYNC pin serves dual roles: synchronization to external clocks up to 1.61 MHz (≤2× nominal), and shutdown activation via >20 µs high pulse. The COMP pin supports integral-only compensation for stable auto-mode transitions, and the error amplifier delivers 50–130 dB open-loop gain with 5 MHz unity-gain bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1 MHz nominal; enables compact 15 µH inductor and low-profile MLCC output filtering in space-constrained handhelds. |
| Input Voltage Range | 2.5 V to 9 V; supports single or dual Li-ion battery stacks (2.5–4.2 V/cell) without pre-regulation. |
| Output Voltage Range | 0.8 V to 8 V adjustable via FB resistor divider; covers core logic (1.8 V), I/O (3.3 V), and analog rails (5 V). |
| Max Output Current | 500 mA continuous; sufficient for baseband processors and image sensors in PDAs and digital cameras. |
| Light-Load Efficiency Mode | Auto-switching to PFM below ~100 mA; reduces quiescent current to 250–370 µA and extends battery runtime. |
| Shutdown Current | 1–25 µA; preserves shelf life during device standby or transport modes. |
| Package | 8-pin SOIC (D package); industry-standard footprint compatible with automated assembly and thermal relief pads. |
Pinout & Package
TPS62102DR is housed in an 8-pin SOIC (D) package with exposed pad not present; thermal performance relies on PCB copper area under AGND/PGND pins. Pin functions are validated per SLUS446B Rev. December 2000.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 2.5–9 V; requires local 1-µF ceramic decoupling; connects directly to battery or intermediate rail. |
| SD/SYNC (Pin 2) | Dual-function control | Rising-edge sync input (0–2 V) or shutdown trigger (>20 µs high pulse); no internal pull-down - must be driven. |
| MODE (Pin 3) | Operating mode selector | Floating = auto-switching; high = forced PWM; low = forced PFM; thresholds defined at 300 mV (low) and 600 mV (high). |
| AGND (Pin 4) | Analog ground reference | Reference for internal VREF, comparators, and error amp; must tie to quiet ground plane, separate from PGND if possible. |
| COMP (Pin 5) | Error amplifier output | Drives external RC compensation network; goes high-Z in PFM mode; requires integral-only design for stable auto-mode. |
| FB (Pin 6) | Feedback input | Senses divided output voltage; regulated to 800 mV in PWM, 785–815 mV in PFM; 770 mV triggers PWM re-entry. |
| PGND (Pin 7) | Power ground return | High-current return path for SW node and internal FETs; must connect to low-impedance ground plane near inductor. |
| SW (Pin 8) | Switch node output | Drives external inductor; swings from near 0 V to VIN; requires tight layout to minimize EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-auto-mode operation | Seamlessly transitions between 1-MHz PWM and burst-mode PFM based on FB voltage, eliminating manual mode selection while maximizing efficiency from 0–500 mA. |
| Externally synchronizable clock | Accepts external sync signal up to 1.61 MHz, enabling noise-sensitive systems (e.g., RF sections in satellite phones) to avoid beat frequencies. |
| Integrated N- and P-channel MOSFETs | Eliminates need for external synchronous rectifier diode; reduces BOM count and improves full-load efficiency by ≥5% vs. diode-based solutions. |
| Three-stage overcurrent protection | 1-A pulse termination + 1.2-A soft-start reset + thermal shutdown at 170°C die temperature - ensures robustness under short-circuit or overload. |
| Programmable soft-start | Fixed 5-ms ramp time prevents inrush current into output capacitors; closed-loop design minimizes startup overshoot even with 10-µF MLC output. |
Applications
| Cellular Telephones | Satellite Telephones |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver from dual Li-ion battery (7.2–8.4 V). IC Role / Device Role / Timing Role: Primary step-down regulator delivering 3.3 V at 0–500 mA with dynamic load response to burst transmission cycles. Use Value: Auto-mode switching maintains >85% efficiency at 10 mA idle current and >90% at 300 mA active load - extending talk time without manual mode tuning. |
Use Scenario: Supplying LNA, mixer, and GPS front-end ICs in ruggedized satellite comms terminals. IC Role / Device Role / Timing Role: Synchronized 1-MHz buck converter referenced to system clock to suppress switching noise in sensitive 1.575-GHz GPS band. Use Value: SD/SYNC pin allows precise alignment of switching edges away from critical receive windows, reducing in-band interference by >20 dB. |
| Digital Still Cameras | PDAs and Handheld Cameras |
Use Scenario: Generating 1.8 V core voltage for CMOS image sensor and 3.3 V for memory interface during rapid capture sequences. IC Role / Device Role / Timing Role: Fast-transient buck regulator supporting 250 mA → 500 mA load steps with <400 µs recovery (per Figure 16). Use Value: Soft-start and multimode control prevent brownout during flash charging while maintaining stable sensor bias during exposure. |
Use Scenario: Powering ARM-based application processor and touchscreen controller from single Li-ion cell (2.5–4.2 V). IC Role / Device Role / Timing Role: Adjustable-output buck converter delivering 1.8 V at up to 500 mA with automatic light-load optimization. Use Value: 250 µA PFM quiescent current enables multi-week standby without battery drain - critical for always-on PDA functionality. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62040DR | Fixed 3.3 V output; 3-MHz switching; 600-mA rating; smaller 10-pin VSON package. | Not adjustable; higher frequency demands tighter layout and lower-ESR caps; better suited for fixed-rail, ultra-compact designs. | Select when output voltage is fixed and board space is constrained - not for adjustable or dual-battery input use cases. |
| TPS62231DR | 1.8–6.5 V input; 3-MHz switching; 600-mA rating; integrated soft-start and power-good. | Lacks SD/SYNC sync capability; no PFM threshold programmability; simplified MODE logic (EN only). | Choose for cost-sensitive, high-volume consumer apps where sync and multimode precision are unnecessary. |
Compared with TPS62102DR, TPS62040DR trades adjustability and dual-battery input support for higher frequency and smaller footprint, while TPS62231DR sacrifices synchronization and fine-grained light-load control for integration and ease of use - making TPS62102DR uniquely suited for battery-powered RF and imaging systems requiring adaptive efficiency.
Availability
TPS62102DR is available at Aetrix Electronics and suitable for cellular telephones, satellite telephones, and digital still cameras requiring stable component supply with long-term industrial availability and consistent parametric performance.
Supply support for TPS62102DR 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 ICs, with decades of expertise in high-efficiency DC-DC conversion for portable and industrial applications.
The TPS6210x family was designed specifically for Li-ion battery-powered portable electronics - prioritizing multimode efficiency, small solution size, and robust protection in handheld and mobile communication devices.
FAQ
What is the exact switching frequency of the TPS62102DR?
The TPS62102DR is the 1-MHz version of the TPS6210x family, with a nominal switching frequency of 1 MHz (min 0.75 MHz, max 1.25 MHz at VIN = 5 V). This frequency is factory-trimmed and remains stable across input voltage and temperature; it can also be synchronized externally up to 1.61 MHz using the SD/SYNC pin.
How does the TPS62102DR enter and exit auto-mode operation?
The TPS62102DR enters auto-mode when the MODE pin is left floating. It starts in constant-frequency PWM mode and transitions to pulsed-variable-frequency (PFM) mode when inductor current approaches discontinuity. It exits PFM and re-enters PWM when the FB pin voltage falls to ~770 mV - a threshold confirmed in SLUS446B Section 5.
What are the absolute maximum ratings for the SD/SYNC pin on the TPS62102DR?
The SD/SYNC pin on the TPS62102DR has an absolute maximum input voltage of –0.3 V to VIN + 0.3 V. Its shutdown threshold is 0.5–2.3 V, and it requires a pulse width >20 µs to activate shutdown. Input current is limited to ±100 nA at 0 V and ±1 µA at 7.2 V - values verified in the Absolute Maximum Ratings and Electrical Characteristics tables of SLUS446B.
Can the TPS62102DR operate from a single Li-ion cell?
Yes, the TPS62102DR supports input voltages as low as 2.5 V, making it fully compatible with single Li-ion cells (2.5–4.2 V). Application Figure 14 in SLUS446B demonstrates a working 1.8-V output design with 0–500 mA load capability using a single-cell input - confirming viability for ultra-portable devices.
What is the purpose of the COMP pin on the TPS62102DR, and how should it be used?
On the TPS62102DR, the COMP pin is the error amplifier output and serves as the control node for loop compensation. It must be connected to an RC network between COMP and FB. For stable auto-mode operation, TI specifies integral-only compensation (no DC path), as detailed in Section 9 of SLUS446B - ensuring accurate FB threshold tracking during PWM/PFM transitions.
TPS62102DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 8V
- Current - Output:
- 500mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS62102DR FAQ
1.How can I place an order for TPS62102DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62102DR 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 TPS62102DR reliable?
The price and inventory of TPS62102DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62102DR is usually 5 days.
3.What payment methods are accepted for TPS62102DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62102DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62102DR?
TPS62102DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62102DR 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 TPS62102DR?
For technical support, including TPS62102DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62102DR requirements.
6.How does Aetrix verify that TPS62102DR is sourced from the original manufacturer or authorized distributors?
All TPS62102DR 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 TPS62102DR meets industry standards.
7.What is the process for return or replacement of TPS62102DR?
All TPS62102DR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62102DR, 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 TPS62102DR part is unused and in its original packaging.
Return procedure for TPS62102DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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