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Texas Instruments TPS62103D
- Part No.:
- TPS62103D
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS62103D.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,038
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Product details
Overview
TPS62103D from Texas Instruments is a synchronous buck DC-DC converter IC designed for 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 2 MHz fixed switching frequency with external synchronization capability. Its dual-auto-mode operation enables high efficiency across light and heavy loads in handheld GPS devices and digital still cameras.
For engineers reviewing the TPS62103D datasheet, TPS62103D pinout, TPS62103D application, or TPS62103D equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (auto/forced-PWM/forced-PFM), real-world load-step response data, and manufacturer-validated alternative options for li-ion–powered compact power designs.
Technical Context
The TPS62103D integrates N-channel and P-channel MOSFETs in an 8-pin SOIC package and uses voltage-mode PWM control with internal 0.8-V reference. Its MODE pin selects among constant-frequency PWM (high-load), pulsed-variable-frequency (light-load), or automatic transition between both based on inductor current detection.
The SD/SYNC pin serves dual roles: applying >20 µs high-level signal initiates shutdown with <15 µA quiescent current, while sub-2.5 MHz external clock pulses synchronize switching. The COMP pin supports loop compensation with origin-pole + dual-zero networks optimized for MLCC output capacitors and 2 MHz operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 9 V - supports single or dual li-ion cell stacks without pre-regulation. |
| Output Voltage Range | 0.8 V to 8 V - adjustable via FB resistor divider; 800 mV feedback reference enables precise low-voltage rail generation. |
| Max Output Current | 500 mA - sustained delivery under continuous conduction mode with appropriate inductor sizing. |
| Switching Frequency | 2 MHz (typ) - enables compact LC filter design; synchronizable up to 2.5 MHz for EMI reduction. |
| Efficiency Modes | Dual-auto-mode - automatically transitions between PWM and PFM to maintain >85% efficiency from 1 mA to 500 mA load. |
| Quiescent Current | 250 µA (burst mode), 190 µA (sleep mode) - extends battery shelf life in standby states. |
| Shutdown Current | 1 µA - achieved by holding SD/SYNC ≥ VIN for >20 µs; critical for zero-power-off system architecture. |
Pinout & Package
TPS62103D is housed in an 8-pin SOIC (D package), surface-mount, tape-and-reel compatible package with standard 1.27 mm pitch and 4.9 mm × 3.9 mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Accepts 2.5–9 V supply; connects to input capacitor and battery source; must be decoupled locally. |
| SD/SYNC (Pin 2) | Control Input | Dual-function: rising-edge sync input (0–2 V) or shutdown trigger (>1 V for >20 µs); requires external pull-down. |
| MODE (Pin 3) | Mode Select | Float = auto-switching; high = forced PWM; low = forced PFM; sets operating topology and transient response. |
| AGND (Pin 4) | Analog Ground | Reference for internal bandgap, error amplifier, and comparators; separate from PGND to minimize noise coupling. |
| COMP (Pin 5) | Error Amplifier Output | Drives external RC compensation network; goes high-Z in PFM mode to prevent offset drift affecting regulation. |
| FB (Pin 6) | Feedback Input | Monitors divided output voltage; regulated to 800 mV in PWM mode, 785–815 mV in PFM mode. |
| PGND (Pin 7) | Power Ground | Return path for high-current SW node and internal FETs; must be low-inductance connection to input/output caps. |
| SW (Pin 8) | Power Switch Node | Drives external inductor; connects to internal N-FET drain and P-FET source; requires tight layout to minimize ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated N- and P-channel MOSFETs eliminate Schottky diode loss, enabling >90% peak efficiency at 500 mA. |
| Auto-mode load detection | Internal circuitry senses inductor current zero-crossing to switch between PWM and PFM without external sensors. |
| Soft-start | 5 ms built-in closed-loop soft-start prevents output overshoot and limits inrush current during power-up. |
| Overcurrent protection | Two-tier protection: 1 A pulse termination + 1.2 A soft-start restart prevents latch-up during short-circuit events. |
| Thermal shutdown | Activates at 170°C junction temperature; device resumes operation after die cools, ensuring robust field reliability. |
Applications
| GPS Receivers | Digital Still Cameras |
|---|---|
Use Scenario: Compact handheld GPS units powered by dual li-ion cells requiring stable 3.3 V for RF front-end and baseband ICs. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.3 V at 200–500 mA with fast load-step response to handle bursty GNSS acquisition current. Use Value: Dual-auto-mode maintains >87% efficiency across 1 mA (standby tracking) to 500 mA (cold-start acquisition), extending battery runtime by 32% vs fixed-frequency only. |
Use Scenario: Portable digital cameras needing clean, low-noise 2.8 V for CMOS image sensor and 1.8 V for processor core. IC Role / Device Role / Timing Role: Adjustable-output buck converter generating multiple rails via resistor-divider reconfiguration; supports rapid wake-from-sleep transitions. Use Value: 2 MHz switching allows use of 2.2 µH inductors and 10 µF MLCCs, reducing solution size by 40% versus 300 kHz alternatives. |
| Satellite Phones | PDAs & Handheld Terminals |
Use Scenario: Ruggedized satellite communication handsets operating across –40°C to +85°C with wide-input battery voltage swing (3.2–8.4 V). IC Role / Device Role / Timing Role: Main system power regulator supplying 3.3 V to transceiver and baseband; handles deep discharge and cold-temperature startup. Use Value: Validated operation down to –40°C with no derating; shutdown current <15 µA preserves battery charge during weeks-long storage. |
Use Scenario: Enterprise PDAs running Windows Mobile or Android derivatives with dynamic CPU load and backlight dimming. IC Role / Device Role / Timing Role: System PMIC buck stage powering application processor I/O and memory interface; responds to 100 mA–500 mA load steps in <50 µs. Use Value: Automatic PWM-to-PFM transition at ~100 mA load reduces idle power by 65%, directly increasing screen-on time per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62102D | 1 MHz switching frequency; lower max sync frequency (1.61 MHz); identical pinout and control logic. | Better suited for cost-sensitive designs where EMI filtering is less stringent and larger inductors are acceptable. | Select when 2 MHz is unnecessary and board space permits 4.7 µH inductors instead of 1.5 µH. |
| TPS62203DRVR | 2 MHz, 600 mA rated, 5-pin SOT-23 package; lacks MODE pin and auto-mode functionality; simplified control interface. | Targeted at fixed-output, low-complexity applications where only forced-PWM operation is required. | Choose for space-constrained layouts needing minimal external components and no light-load efficiency optimization. |
Compared with TPS62102D and TPS62203DRVR, the TPS62103D uniquely combines 2 MHz operation, full auto-mode intelligence, and 8-pin SOIC thermal performance-making it optimal for compact, battery-life-critical GPS and imaging systems requiring adaptive efficiency without sacrificing transient response.
Availability
TPS62103D is available at Aetrix Electronics and suitable for GPS receivers, digital still cameras, satellite telephones, PDAs, and handheld terminals requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for TPS62103D 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 over 50 years of innovation in energy-efficient power conversion.
The TPS6210x product line was engineered specifically for portable li-ion–powered systems demanding high efficiency across ultra-light to full-load conditions, with emphasis on small solution size, low quiescent current, and seamless mode transitions.
FAQ
What is the maximum switching frequency of the TPS62103D and how is it synchronized?
The TPS62103D has a nominal switching frequency of 2 MHz and supports external synchronization up to 2.5 MHz via the SD/SYNC pin. Synchronization is edge-triggered on the rising edge of an external clock signal applied to that pin, enabling EMI spread-spectrum control or phase alignment with other system clocks. The TPS62103D datasheet specifies a minimum synchronization pulse width of 50 ns and maximum of 37 µs to ensure reliable locking without false triggering.
How does the TPS62103D achieve high efficiency at light loads?
The TPS62103D achieves high light-load efficiency through its dual-auto-mode architecture: it automatically transitions from constant-frequency PWM to pulsed-variable-frequency (PFM) operation when output current drops below ~100 mA. In PFM mode, the TPS62103D regulates output by delivering discrete current pulses (~200 mA peak) only when needed, reducing switching losses and quiescent current to 250 µA. This preserves battery life in standby or intermittent-use applications like GPS tracking.
What are the absolute maximum ratings for the TPS62103D's SW pin?
The SW pin of the TPS62103D has an absolute maximum voltage rating of –0.3 V to VIN + 0.3 V and a maximum output current rating of 1.6 A. Exceeding these limits risks permanent damage to the internal N- and P-channel MOSFETs. During normal operation, peak SW current is limited to 1.25 A (current limit 1) and 1.55 A (current limit 2), with thermal shutdown engaging at 170°C junction temperature to protect against sustained overload.
Can the TPS62103D operate from a single li-ion cell?
Yes, the TPS62103D supports input voltages as low as 2.5 V, making it fully compatible with single li-ion cells (2.7–4.2 V range). Application circuits such as the 1.8-V output automatic-mode converter (Figure 14 in SLUS446B) validate stable operation down to 2.5 V input while delivering 500 mA. Its 0.8-V adjustable output also enables direct core-rail generation for low-voltage processors in single-cell configurations.
What compensation network is recommended for the TPS62103D at 2 MHz operation?
For 2 MHz operation, TI recommends a compensation network with an origin pole (no DC path from COMP to FB), two zeros placed below and above the L-C resonance frequency, and a high-frequency pole. Typical values include R1=10 kΩ, R2=100 kΩ, C1=100 pF, C2=1 nF, and R4=10 kΩ - configured to provide >60° phase margin. The TPS62103D's error amplifier unity-gain bandwidth (~3 MHz) and gain-phase response (Figure 1) must be factored into final loop tuning using SPICE simulation.
TPS62103D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS62103D FAQ
1.How can I place an order for TPS62103D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62103D 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 TPS62103D reliable?
The price and inventory of TPS62103D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62103D is usually 5 days.
3.What payment methods are accepted for TPS62103D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62103D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62103D?
TPS62103D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62103D 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 TPS62103D?
For technical support, including TPS62103D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62103D requirements.
6.How does Aetrix verify that TPS62103D is sourced from the original manufacturer or authorized distributors?
All TPS62103D 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 TPS62103D meets industry standards.
7.What is the process for return or replacement of TPS62103D?
All TPS62103D units undergo pre-shipment inspection (PSI). If there is an issue with TPS62103D, 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 TPS62103D part is unused and in its original packaging.
Return procedure for TPS62103D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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