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Texas Instruments TPS62103DRG4
- Part No.:
- TPS62103DRG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS62103DRG4.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
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Product details
Overview
TPS62103DRG4 from Texas Instruments is a 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 2 MHz fixed switching frequency with external synchronization capability. Its dual-auto-mode enables high efficiency across light and heavy loads in GPS devices and digital still cameras.
For engineers reviewing the TPS62103DRG4 datasheet, TPS62103DRG4 pinout, TPS62103DRG4 application, or TPS62103DRG4 equivalent, key selection criteria include its 2 MHz operation, 8-pin SOIC package, auto-mode load detection, 0%–100% duty cycle control, and integrated N-FET/P-FET switch with 0.3 Ω/0.5 Ω RDS(on) at 7.2 V.
Technical Context
The TPS62103DRG4 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 provides 50–130 dB open-loop gain and 5 MHz unity-gain bandwidth, supporting stable compensation for high-frequency designs.
It integrates dual MOSFETs (N-FET and P-FET), soft-start (5 ms), three-stage overcurrent protection (200 mA burst limit, 1 A fast-trip, 1.2 A soft-start-triggering), and thermal shutdown at 170°C. The SD/SYNC pin serves as both synchronization input (up to 2.5 MHz) and shutdown trigger (>20 µs high pulse).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 9 V - supports single or dual Li-ion battery stacks without pre-regulation. |
| Output Voltage Range | 0.8 V to 8 V - adjustable via external resistor divider; FB threshold = 800 mV ±10 mV. |
| Max Output Current | 500 mA - continuous output under constant-frequency mode with proper thermal design. |
| Switching Frequency | 2 MHz (nominal) - enables compact LC filter design; synchronizable up to 2.5 MHz. |
| N-FET RDS(on) | 0.3 Ω (typ) at VIN = 7.2 V - reduces conduction loss in high-current phase. |
| P-FET RDS(on) | 0.5 Ω (typ) at VIN = 7.2 V - enables synchronous rectification without external diode. |
| Quiescent Current | 250 µA (typ) in burst mode - extends battery life during light-load standby. |
| Shutdown Current | 1 µA (typ) - preserves battery shelf life during system sleep. |
Pinout & Package
TPS62103DRG4 is housed in an 8-pin SOIC (D) package with standard surface-mount footprint (5.3 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 high-side switch source. |
| SD/SYNC (Pin 2) | Dual-function control | Rising-edge sync input (0–2 V); >20 µs high pulse forces shutdown; must not float. |
| MODE (Pin 3) | Operating mode selector | High = forced constant-frequency; low = forced variable-frequency; floating = auto-switching. |
| AGND (Pin 4) | Analog ground reference | Reference for internal reference, comparators, and feedback circuitry; separate from PGND. |
| COMP (Pin 5) | Error amplifier output | Connects to RC network for loop compensation; enters high-Z state in light-load mode. |
| FB (Pin 6) | Feedback voltage input | Senses divided output; regulated to 800 mV in PWM mode; thresholds shift to 785–815 mV in PFM. |
| PGND (Pin 7) | Power ground return | Return path for high-current SW node and internal FETs; requires low-inductance layout tie to AGND. |
| SW (Pin 8) | Switch node output | Drives external inductor; swings between VIN and ~0.3 V (N-FET drop) or ~–0.5 V (P-FET drop). |
Key Features
| Feature | Design Value |
|---|---|
| Dual-auto-mode operation | Automatically transitions between constant-frequency (≥100 mA load) and pulsed-variable-frequency (≤100 mA) modes to maintain >85% efficiency across full load range. |
| Externally synchronizable clock | Accepts external clock up to 2.5 MHz on SD/SYNC pin, enabling EMI reduction and multi-rail timing coordination. |
| Integrated dual-MOSFET power stage | Eliminates need for external Schottky diode and reduces BOM count; N-FET + P-FET topology supports 0%–100% duty cycle. |
| Three-level overcurrent protection | 200 mA peak-inductor limit (PFM), 1 A fast-trip (PWM), and 1.2 A soft-start-triggering prevent latch-up during shorts. |
| Programmable soft-start | 5 ms built-in soft-start prevents inrush current; closed-loop ramp ensures monotonic VOUT rise without overshoot. |
| Thermal shutdown with auto-recovery | Shuts down at 170°C junction temperature and resumes operation after die cools, protecting against sustained overload. |
Applications
| GPS Navigation Devices | Digital Still Cameras |
|---|---|
|
Use Scenario: Powering RF front-end, baseband processor, and display backlight from dual Li-ion cells with dynamic load profiles. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 3.3 V or 2.8 V rail with fast transient response to burst-mode RF transmission. Use Value: Dual-auto-mode maintains >90% efficiency during GPS acquisition (light load) and >87% during active navigation (heavy load), extending field battery life by 22% vs. fixed-frequency alternatives. |
Use Scenario: Supplying image sensor, ISP, and memory interface in compact camera modules where board space limits inductor size. IC Role / Device Role / Timing Role: High-frequency (2 MHz) buck converter enabling ≤2.2 µH inductors and 10 µF ceramic output capacitance. Use Value: 2 MHz operation reduces filter component volume by 40% vs. 600 kHz parts, meeting strict mechanical envelope requirements of ultra-thin camera bodies. |
| Cellular Telephones | PDAs and Handheld Terminals |
|
Use Scenario: Regulating core voltage for application processors and cellular modems in multi-band handsets with aggressive power cycling. IC Role / Device Role / Timing Role: System PMIC rail generator supporting dynamic voltage scaling (DVS) and deep-sleep states via precise MODE pin control. Use Value: Shutdown current <1 µA and burst-mode quiescent current <370 µA minimize leakage during 3G/4G idle periods, improving standby time by 3.2 days per charge cycle. |
Use Scenario: Powering ARM-based application processors, touchscreen controllers, and wireless transceivers in industrial PDAs operating across –20°C to 70°C ambient. IC Role / Device Role / Timing Role: Robust main power supply with thermal shutdown and wide-input tolerance for unregulated battery inputs. Use Value: Absolute max input rating of 10 V and operating junction range of –40°C to +150°C ensure reliable startup and regulation even with fully charged Li-ion (4.25 V/cell × 2). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3 MHz switching frequency, 2-A output, 2.7–6 V input; uses different MODE logic and lacks SD/SYNC dual function. | Better suited for higher-current, lower-input applications (e.g., USB-powered systems); incompatible pinout and control interface. | Select when >500 mA output or sub-3 V input is required; verify MODE/SD/SYNC signal mapping and compensation stability at 3 MHz. |
| LM2678SD-ADJ/NOPB | 100 kHz fixed frequency, 5-A output, external MOSFET drive; no auto-mode, no synchronization, larger SO-8 package. | Targeted at high-power, low-EMI industrial supplies; lacks light-load optimization and battery-aware features. | Choose only for cost-sensitive, non-portable designs requiring >1 A output and minimal BOM complexity; expect 20–30% lower light-load efficiency. |
Compared with TPS62103DRG4, TPS62130ARGTR offers higher frequency and current but narrower input range and no true auto-mode, while LM2678SD-ADJ/NOPB provides raw power headroom at the expense of battery efficiency and integration-making TPS62103DRG4 optimal for space-constrained, dual-cell Li-ion portable systems demanding adaptive efficiency.
Availability
TPS62103DRG4 is available at Aetrix Electronics and suitable for GPS navigation devices, digital still cameras, cellular telephones, and PDAs requiring stable component supply with long-term lifecycle support and consistent parametric performance.
Supply support for TPS62103DRG4 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 product line was designed specifically for high-efficiency, small-footprint DC-DC conversion in battery-powered portable electronics, emphasizing adaptive light-load operation and seamless integration with Li-ion battery stacks.
FAQ
What is the maximum switching frequency of the TPS62103DRG4?
The TPS62103DRG4 has a nominal switching frequency of 2 MHz and supports external synchronization up to 2.5 MHz. This high-frequency capability allows use of smaller inductors and ceramic capacitors, reducing solution size and cost. The device maintains stable regulation across the full 1.5–2.5 MHz sync range, with reduced sawtooth amplitude above 2 MHz requiring careful noise mitigation in the COMP loop.
Does the TPS62103DRG4 require an external Schottky diode?
No, the TPS62103DRG4 does not require an external Schottky diode because it integrates both N-channel and P-channel MOSFETs for synchronous rectification. The internal P-FET replaces the freewheel diode, eliminating forward voltage drop and improving light-load efficiency. External diodes like the 10BQ040 shown in typical applications are optional and used only in specific forced-PWM configurations for added robustness.
How does the MODE pin affect operation of the TPS62103DRG4?
The MODE pin on the TPS62103DRG4 selects among three operating modes: high voltage forces constant-frequency PWM mode; low voltage enables forced variable-frequency (burst) mode; and floating (high-impedance) activates automatic mode switching. In auto-mode, the IC transitions between PWM and burst modes based on load current and FB voltage thresholds (e.g., entering burst mode when FB drops below 770 mV), optimizing efficiency across 0–500 mA output range.
What is the purpose of the SD/SYNC pin on the TPS62103DRG4?
The SD/SYNC pin on the TPS62103DRG4 serves two distinct functions: applying a >20 µs high pulse shuts down the IC to reduce VIN current to <1 µA, and applying rising-edge pulses (0–2 V) synchronizes the internal oscillator to an external clock up to 2.5 MHz. This dual functionality eliminates need for separate enable and sync pins, simplifying PCB routing. The pin must never be left floating due to lack of internal pull-down.
Can the TPS62103DRG4 operate from a single Li-ion cell?
Yes, the TPS62103DRG4 supports input voltages as low as 2.5 V, making it compatible with single Li-ion cells (2.7–4.2 V range). Application circuits in the datasheet confirm stable 1.8 V output operation from 2.5–4.25 V input using automatic mode switching. At minimum VIN, output current capability decreases slightly due to reduced headroom, but full 500 mA remains achievable above 3.0 V input.
TPS62103DRG4 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
TPS62103DRG4 FAQ
1.How can I place an order for TPS62103DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62103DRG4 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 TPS62103DRG4 reliable?
The price and inventory of TPS62103DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62103DRG4 is usually 5 days.
3.What payment methods are accepted for TPS62103DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62103DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62103DRG4?
TPS62103DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62103DRG4 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 TPS62103DRG4?
For technical support, including TPS62103DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62103DRG4 requirements.
6.How does Aetrix verify that TPS62103DRG4 is sourced from the original manufacturer or authorized distributors?
All TPS62103DRG4 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 TPS62103DRG4 meets industry standards.
7.What is the process for return or replacement of TPS62103DRG4?
All TPS62103DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62103DRG4, 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 TPS62103DRG4 part is unused and in its original packaging.
Return procedure for TPS62103DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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