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Texas Instruments TPS62103DR
- Part No.:
- TPS62103DR
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS62103DR.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,145
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Product details
Overview
TPS62103DR from Texas Instruments is a synchronous buck DC-DC converter optimized for single/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 2 MHz fixed switching frequency with external synchronization capability. Its dual-auto-mode enables high efficiency across light-to-heavy loads in GPS devices and digital still cameras.
For engineers reviewing the TPS62103DR datasheet, TPS62103DR pinout, TPS62103DR application, or TPS62103DR equivalent, key selection criteria include its 2 MHz operation, 8-pin SOIC package, auto-mode load detection, low-quiescent current in burst mode (250–370 µA), and integrated N-/P-FETs with RDS(on) of 0.3–0.6 Ω / 0.5–1.0 Ω.
Technical Context
The TPS62103DR implements voltage-mode PWM control with an internal 0.8-V reference and tri-function MODE pin enabling forced constant-frequency, forced variable-frequency, or automatic mode switching based on load current. Its error amplifier features 50–130 dB open-loop gain and ~5 MHz unity-gain bandwidth, supporting stable compensation for high-frequency designs.
It integrates dual FETs (N-channel high-side and P-channel low-side), supports 0%–100% duty cycle, and uses zero-current detection to trigger mode transitions. The SD/SYNC pin provides both synchronization (up to 2.5 MHz) and shutdown (≥20 µs high pulse), with no internal pull-down requiring external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 9 V - supports 1-cell (2.5–4.2 V) and 2-cell (5–8.4 V) Li-ion battery inputs without external regulators. |
| Output Voltage Range | 0.8 V to 8 V - adjustable via external resistor divider; FB pin regulated to 800 mV ±10 mV in constant-frequency mode. |
| Max Output Current | 500 mA - sustained continuous output under thermal limits; peak switch current limited to 1.25 A for overcurrent protection. |
| Switching Frequency | 2 MHz (typ) - enables compact LC filter design with small inductors (e.g., 15 µH) and ceramic capacitors. |
| Quiescent Current | 250–370 µA in burst mode - extends battery runtime during standby in handheld devices like PDAs and GPS units. |
| FET RDS(on) | N-FET: 0.3–0.6 Ω, P-FET: 0.5–1.0 Ω at VIN = 7.2 V - reduces conduction loss and improves full-load efficiency (>90% typical). |
| Soft-Start Time | 5 ms (typ) - controlled ramp of error amplifier reference prevents inrush current and output overshoot at power-up. |
Pinout & Package
TPS62103DR is housed in an 8-pin SOIC (D) package with standard surface-mount footprint (5.0 mm × 6.2 mm, 1.75 mm height). Pin 1 is marked by a beveled corner or dot; top-side view follows standard D-package orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 2.5–9 V supply; connects to input capacitor and battery source; must be decoupled locally. |
| SD/SYNC (Pin 2) | Dual-function control input | Pulled high ≥20 µs for shutdown; driven with 0–2 V square wave for synchronization; requires external pull-down. |
| MODE (Pin 3) | Operating mode selector | Floating → auto-mode; high → constant-frequency PWM; low → variable-frequency burst mode (≤100 mA). |
| AGND (Pin 4) | Analog ground reference | Return for internal reference, comparators, and error amplifier; must be connected to quiet ground plane. |
| COMP (Pin 5) | Error amplifier output | Connects to RC network for loop compensation; goes high-impedance in light-load mode to disable feedback path. |
| FB (Pin 6) | Feedback voltage sense | Monitors divided output; regulated to 800 mV in PWM mode; thresholds (770–815 mV) trigger auto-mode transitions. |
| PGND (Pin 7) | Power ground return | High-current return path for SW node and internal FETs; must be routed separately from AGND and joined at single point. |
| SW (Pin 8) | Switch node output | Drives external inductor; connects to internal N-/P-FETs; requires low-inductance layout to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-auto-mode operation | Automatically switches between constant-frequency (heavy load) and pulsed-variable-frequency (light load) to maintain >85% efficiency from 1 mA to 500 mA. |
| Externally synchronizable clock | Accepts external sync signal up to 2.5 MHz, enabling noise-sensitive systems (e.g., RF sections) to avoid beat frequencies. |
| Integrated dual-FET power stage | Eliminates need for external Schottky catch diode; reduces BOM count and PCB area while improving efficiency by ~5% vs diode-based solutions. |
| Three-stage overcurrent protection | First-level trip at ~1 A (pulse termination), second-level at ~1.2 A (forces soft-start), plus thermal shutdown at 170°C die temperature. |
| Low-noise soft-start | 5 ms closed-loop ramp prevents output overshoot and inrush stress on input capacitors and downstream LDOs. |
Applications
| GPS Devices | Digital Still Cameras |
|---|---|
Use Scenario: Powering GPS baseband processor and RF front-end from dual Li-ion cells with dynamic load ranging from 1 mA (standby) to 450 mA (acquisition). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3 V rail; manages mode transitions autonomously to extend battery life during satellite search intervals. Use Value: Achieves >92% efficiency at 10 mA and >88% at 450 mA, reducing thermal load and enabling smaller battery packs. |
Use Scenario: Supplying image sensor, ISP, and flash controller in compact digital camera with burst-mode capture and long idle periods. IC Role / Device Role / Timing Role: Adjustable-output buck converter set to 1.8 V for sensor core and 3.3 V for interface; MODE pin left floating for seamless light/heavy load adaptation. Use Value: Burst-mode quiescent current of 250 µA minimizes standby drain, extending time-lapse operation from hours to days on single charge. |
| Cellular Telephones | PDAs and Handheld Cameras |
Use Scenario: Regulating core voltage for application processor in 2G/3G feature phones operating from single Li-ion cell (2.8–4.2 V). IC Role / Device Role / Timing Role: High-efficiency step-down converter delivering 1.2 V at up to 500 mA; synchronized to system clock to suppress switching noise in audio band. Use Value: 2 MHz operation allows use of 15 µH inductor and 10 µF MLC output cap, shrinking solution size by 40% vs 300 kHz alternatives. |
Use Scenario: Powering ARM-based PDA SoC with variable DVFS demands and intermittent wireless (Bluetooth/Wi-Fi) activity. IC Role / Device Role / Timing Role: Dual-rail generator (via resistor reconfiguration) providing 1.5 V for CPU and 3.3 V for peripherals; SD/SYNC pin used for coordinated power-state timing. Use Value: Auto-mode eliminates need for software-controlled enable/disable, simplifying power management firmware and reducing wake-up latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62040DR | Fixed 3.3 V output; 3-MHz switching; 6-pin SOT-23 package; no MODE pin or auto-mode functionality. | Suitable only for fixed-voltage, space-constrained designs with steady loads; lacks light-load efficiency optimization. | Select when board area is critical and output voltage is invariant; avoid if battery life under variable load is a priority. |
| TPS62231DR | 2.0–6.0 V input; 3-MHz operation; 1.8–3.3 V fixed outputs; 6-pin WSON package; integrated soft-start and enable. | Targeted at ultra-low-power microcontrollers and sensors; lower max input voltage excludes dual-cell battery use. | Prefer for single-cell, low-IQ (<15 µA) applications where 500 mA output is not required; incompatible with 8–9 V input scenarios. |
Compared with TPS62103DR, TPS62040DR offers higher frequency and smaller footprint but sacrifices adjustable output and adaptive efficiency modes, while TPS62231DR provides lower quiescent current and simpler integration yet lacks the input voltage range and multimode flexibility needed for dual-cell portable systems.
Availability
TPS62103DR is available at Aetrix Electronics and suitable for GPS devices, digital still cameras, and cellular telephones requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TPS62103DR 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 and embedded processing technologies, with decades of expertise in power management ICs for portable and industrial applications.
The TPS6210x family was designed specifically for high-efficiency, small-footprint DC-DC conversion in Li-ion–powered portable electronics, emphasizing multimode operation, synchronization capability, and robust protection for battery-critical systems.
FAQ
What is the maximum input voltage rating for the TPS62103DR?
The TPS62103DR has an absolute maximum input voltage rating of 10 V, but its recommended operating range is 2.5 V to 9 V. Exceeding 9 V may compromise reliability or lifetime, especially at elevated temperatures. The device is optimized for single- or dual-cell Li-ion batteries, where 9 V represents the upper limit of a fully charged two-cell pack.
Does the TPS62103DR require an external Schottky diode?
No, the TPS62103DR does not require an external Schottky diode because it integrates both N-channel and P-channel MOSFETs for synchronous rectification. This eliminates conduction losses associated with diode forward voltage drop and improves efficiency-especially at low output voltages-while reducing component count and board area.
How does the auto-mode function work in the TPS62103DR?
The TPS62103DR's auto-mode uses internal load detection via the FB pin voltage thresholds (770 mV to 815 mV) to automatically switch between constant-frequency PWM mode (for heavy loads) and pulsed-variable-frequency burst mode (for light loads). When the MODE pin is left floating, the IC transitions seamlessly without external control, maintaining high efficiency across 1 mA to 500 mA output currents.
What is the purpose of the COMP pin on the TPS62103DR?
On the TPS62103DR, the COMP pin is the output of the internal error amplifier and serves as the control node for loop compensation. An external RC network connects between COMP and FB to stabilize regulation. During light-load burst mode, the COMP pin enters high-impedance state to disconnect the feedback path, preventing interference with threshold-based operation.
Can the TPS62103DR be synchronized to an external clock?
Yes, the TPS62103DR supports external synchronization via the SD/SYNC pin. Applying a clean 0–2 V square wave with rising-edge alignment allows synchronization up to 2.5 MHz. However, TI recommends limiting sync frequency to ≤2× the nominal 2 MHz to avoid reduced sawtooth amplitude, increased PWM gain, and noise susceptibility in the control loop.
TPS62103DR 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:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS62103DR FAQ
1.How can I place an order for TPS62103DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62103DR 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 TPS62103DR reliable?
The price and inventory of TPS62103DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62103DR is usually 5 days.
3.What payment methods are accepted for TPS62103DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62103DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62103DR?
TPS62103DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62103DR 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 TPS62103DR?
For technical support, including TPS62103DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62103DR requirements.
6.How does Aetrix verify that TPS62103DR is sourced from the original manufacturer or authorized distributors?
All TPS62103DR 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 TPS62103DR meets industry standards.
7.What is the process for return or replacement of TPS62103DR?
All TPS62103DR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62103DR, 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 TPS62103DR part is unused and in its original packaging.
Return procedure for TPS62103DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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