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Texas Instruments TPS62103DG4
- Part No.:
- TPS62103DG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS62103DG4.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,029
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Product details
Overview
TPS62103DG4 from Texas Instruments is a 2-MHz 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 dual-auto-mode switching between constant-frequency PWM and pulsed-variable-frequency (PFM) for high efficiency across load range - used in GPS devices and digital still cameras.
For engineers reviewing the TPS62103DG4 datasheet, TPS62103DG4 pinout, TPS62103DG4 application, or TPS62103DG4 equivalent, key selection considerations include its 2 MHz switching frequency, 0%–100% duty cycle support, externally synchronizable SD/SYNC pin, tri-mode MODE control (auto/forced-PWM/forced-PFM), and integrated N-FET/P-FET with 0.6 Ω typical RDS(on) at 7.2 V.
Technical Context
The TPS62103DG4 implements voltage-mode PWM control with an internal 0.8-V reference and error amplifier (80 dB gain, 5 MHz unity-gain bandwidth). Its MODE pin selects among forced-constant-frequency, forced-variable-frequency, or automatic mode-where load-current detection triggers seamless transitions between PWM and PFM based on FB voltage thresholds (770 mV–815 mV).
The SD/SYNC pin serves dual functions: applying >1 V pulses synchronizes the 2 MHz oscillator (max sync frequency 2.5 MHz), while holding >20 µs high enables shutdown with <15 µA quiescent current. Internal overcurrent protection includes two-stage limiting (1 A pulse termination, 1.2 A soft-start reset) and thermal shutdown at 170°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2 MHz nominal; supports external synchronization up to 2.5 MHz - enables compact LC filter design with ≤15 µH inductors. |
| Input Voltage Range | 2.5 V to 9 V - compatible with 1-cell (2.5–4.2 V) and 2-cell (5–8.4 V) Li-ion battery packs. |
| Output Voltage Range | Adjustable 0.8 V to 8 V via resistor divider on FB pin - supports core logic (1.8 V), I/O (3.3 V), and analog rails. |
| Max Output Current | 500 mA continuous - sustained delivery under PWM mode; limited to 100 mA in forced-PFM mode. |
| Duty Cycle Range | 0% to 100% - allows operation down to near-VIN dropout (e.g., 3.3 V out from 3.6 V in) without regulation loss. |
| Quiescent Current | 250 µA typical in burst mode; 190–275 µA in sleep mode - extends battery shelf life during standby. |
| RDS(on) (N-FET) | 0.6 Ω typical at VIN = 7.2 V - reduces conduction loss and improves full-load efficiency (>90% typical). |
Pinout & Package
TPS62103DG4 is housed in an 8-pin SOIC (D) package with exposed pad (not thermally enhanced per datasheet), surface-mount footprint, and standard JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.5–9 V DC; supplies internal circuitry and switch driver; requires local 1-µF ceramic bypass. |
| SD/SYNC (Pin 2) | Multi-function digital input | Drives >1 V for sync (rising-edge triggered); held high >20 µs for shutdown; must not float - no internal pull-down. |
| MODE (Pin 3) | Operating mode selector | High = forced-PWM; low = forced-PFM; open = auto-switching between modes based on load and FB voltage. |
| AGND (Pin 4) | Analog ground reference | Reference for internal reference, comparators, and error amplifier; separate from PGND to minimize noise coupling. |
| COMP (Pin 5) | Error amplifier output | Connects to RC network for loop compensation; goes high-Z in light-load mode to disable feedback path. |
| FB (Pin 6) | Feedback sense input | Monitors divided output voltage; regulated to 800 mV in PWM mode; thresholds 770–815 mV trigger mode transitions. |
| PGND (Pin 7) | Power ground return | Return path for high-current SW node and internal FETs; must be low-inductance connection to minimize EMI. |
| SW (Pin 8) | Switch node output | Drives external LC filter and catch diode; swings from ~0 V to VIN; peak current capability 1.25 A. |
Key Features
| Feature | Design Value |
|---|---|
| Tri-mode operation control | Single MODE pin configures forced-PWM, forced-PFM, or automatic load-adaptive switching - eliminates external mode logic. |
| Synchronous rectification | Integrated N-FET and P-FET replace Schottky diode - eliminates 0.3–0.4 V forward drop, improving light-load efficiency by ≥15%. |
| Programmable soft-start | Fixed 5-ms closed-loop ramp-up - prevents inrush current and output overshoot during power-on or wake-up events. |
| Dual-level overcurrent protection | 1 A fast-trip + 1.2 A soft-start reset - protects against short-circuit without latch-up, enabling robust field operation. |
| Thermal shutdown | Activates at 170°C junction temperature - prevents permanent damage during overload or poor heatsinking; auto-recovery on cooldown. |
Applications
| GPS Devices | Digital Still Cameras |
|---|---|
|
Use Scenario: Portable handheld GPS units powered by dual Li-ion cells requiring stable 3.3-V rail for RF front-end and baseband processor. IC Role / Device Role / Timing Role: Primary buck regulator delivering 500-mA 3.3-V supply with automatic PWM-to-PFM transition during satellite acquisition idle periods. Use Value: Extends battery runtime by >30% versus fixed-frequency converters during low-duty-cycle GPS tracking, leveraging 250-µA burst-mode quiescent current. |
Use Scenario: Compact digital camera with image sensor, LCD backlight, and flash controller drawing variable load from 0–500 mA. IC Role / Device Role / Timing Role: System power manager supplying 1.8-V core and 3.3-V I/O rails; MODE pin left floating for seamless efficiency optimization. Use Value: Maintains >88% efficiency from 10 mA to 500 mA via auto-mode, eliminating need for multiple discrete regulators or LDOs. |
| Cellular Telephones | Satellite Telephones |
|
Use Scenario: GSM/UMTS handset operating from single Li-ion cell (2.8–4.2 V), powering RF transceiver and application processor. IC Role / Device Role / Timing Role: Main system DC-DC converter generating 1.2-V core voltage; SD/SYNC pin synchronized to baseband clock to reduce EMI. Use Value: 2-MHz switching enables use of 15-µH inductor and 10-µF MLC output capacitor - reduces solution size by 40% vs. 300-kHz alternatives. |
Use Scenario: Ruggedized satellite phone with wide input range requirement (3–9 V) due to varying solar/battery hybrid sources. IC Role / Device Role / Timing Role: Input-flexible buck stage stepping down to 5-V intermediate rail for modem and audio codec. Use Value: 9-V absolute maximum input rating and 100% duty cycle support enable direct regulation from unregulated 7.2-V battery packs without pre-regulator. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62040DGQ | 1.2-MHz fixed frequency; no auto-mode or SD/SYNC sync; 6-pin WSON package; 600-mA output. | Lacks load-adaptive efficiency optimization; suited for cost-sensitive, space-constrained designs where fixed frequency suffices. | Select when board area is critical and 2-MHz switching or synchronization is unnecessary. |
| TPS62231DRVR | 3-MHz switching; 300-mA output; 6-pin WSON; integrated compensation; no MODE pin or PFM mode. | Higher frequency enables smaller passives but sacrifices light-load efficiency and multimode flexibility. | Prefer for ultra-compact, low-IQ (<15 µA) applications with steady 100–300 mA loads - not for dynamic portable loads. |
Compared with TPS62103DG4, TPS62040DGQ offers higher output current but lacks auto-mode and sync capability, while TPS62231DRVR achieves smaller size at the expense of adaptive efficiency and programmable operation - making TPS62103DG4 optimal for battery-powered systems demanding both peak performance and standby longevity.
Availability
TPS62103DG4 is available at Aetrix Electronics and suitable for GPS devices, digital still cameras, cellular telephones, satellite telephones, and PDAs requiring stable component supply with long-term production continuity.
Supply support for TPS62103DG4 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 electronics.
The TPS6210x family was designed specifically for Li-ion battery-powered portable equipment requiring high efficiency across wide load ranges - emphasizing auto-mode switching, small solution size, and robust protection.
FAQ
What is the maximum switching frequency of the TPS62103DG4?
The TPS62103DG4 has a nominal switching frequency of 2 MHz and supports external synchronization up to 2.5 MHz via the SD/SYNC pin. This high frequency enables compact LC filter designs using small inductors (e.g., 15 µH) and ceramic capacitors, reducing overall solution footprint - critical for space-constrained portable devices like GPS receivers and digital cameras.
How does the TPS62103DG4 achieve high efficiency at light loads?
The TPS62103DG4 achieves high light-load efficiency through its automatic mode (auto-PWM/PFM) operation: when output current drops below ~100 mA, it transitions from constant-frequency PWM to pulsed-variable-frequency (PFM) mode, reducing switching losses and lowering quiescent current to 250 µA typical. This behavior is controlled internally via FB voltage thresholds (770–815 mV) and requires no external circuitry.
Can the TPS62103DG4 operate from a single Li-ion cell?
Yes, the TPS62103DG4 supports input voltages from 2.5 V to 9 V, fully covering the discharge range of a single Li-ion cell (2.8 V–4.2 V). Its 0%–100% duty cycle capability allows regulation down to very low input-output differentials - for example, delivering 1.8 V output from a 2.8-V cell - making it ideal for single-cell applications like Bluetooth headsets and wearables.
What protection features does the TPS62103DG4 include?
The TPS62103DG4 integrates three key protections: dual-level overcurrent (1 A fast-trip + 1.2 A soft-start reset), thermal shutdown at 170°C, and input undervoltage lockout (implied by 2.5-V min VIN). These ensure reliable operation under fault conditions such as output shorts or ambient overheating - critical for unattended portable equipment like satellite phones and handheld GPS units.
Is the TPS62103DG4 pin-compatible with other members of the TPS6210x family?
Yes, all TPS6210x variants - including TPS62100D, TPS62101D, TPS62102D, and TPS62103D - share identical 8-pin SOIC (D) packaging and pinout. The only functional difference is nominal switching frequency (300 kHz / 600 kHz / 1 MHz / 2 MHz), allowing drop-in replacement when board layout and compensation are tuned for the target frequency.
TPS62103DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TPS62103DG4 FAQ
1.How can I place an order for TPS62103DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62103DG4 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 TPS62103DG4 reliable?
The price and inventory of TPS62103DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62103DG4 is usually 5 days.
3.What payment methods are accepted for TPS62103DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62103DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62103DG4?
TPS62103DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62103DG4 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 TPS62103DG4?
For technical support, including TPS62103DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62103DG4 requirements.
6.How does Aetrix verify that TPS62103DG4 is sourced from the original manufacturer or authorized distributors?
All TPS62103DG4 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 TPS62103DG4 meets industry standards.
7.What is the process for return or replacement of TPS62103DG4?
All TPS62103DG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62103DG4, 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 TPS62103DG4 part is unused and in its original packaging.
Return procedure for TPS62103DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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