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Texas Instruments TPS60503DGSRG4
- Part No.:
- TPS60503DGSRG4
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS60503DGSRG4.pdf
- Description:
- IC REG CHARGE PUMP 1.5V 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,018
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Product details
Overview
TPS60503DGSRG4 from Texas Instruments is a high-efficiency, fixed 1.5-V step-down charge pump DC-DC converter for battery-powered systems. It delivers up to 250 mA output current with ≤3% output voltage tolerance over line, load, and temperature, operates from 1.8 V to 6.5 V input, and integrates power-good supervision and thermal/overcurrent protection. It is used in space-constrained portable instruments requiring stable low-voltage rail generation from single Li-ion cells.
For engineers reviewing the TPS60503DGSRG4 datasheet, TPS60503DGSRG4 pinout, TPS60503DGSRG4 application, or TPS60503DGSRG4 equivalent, key selection criteria include minimum input voltage (≥2.5 V at 150 mA), 10-pin VSSOP package footprint, 90% peak efficiency, soft-start behavior, and compatibility with ceramic flying/output capacitors (C1F = C2F = 1 µF, Co ≥10 µF).
Technical Context
The TPS60503DGSRG4 implements fractional switched-capacitor conversion using two flying capacitors (C1F, C2F) and automatic mode selection among LDO, 2/3x, 0.5x, and 1/3x topologies based on VIN/VOUT ratio and load. Regulation is achieved via internal error amplifier and 0.8-V reference, with FB pin directly connected to OUT for fixed 1.5-V operation.
It features an open-drain PG output that asserts high when OUT reaches ≥97% of nominal (1.455 V), internal soft-start limiting inrush, and shutdown isolation disconnecting load from input. Thermal shutdown activates at 150°C with foldback current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±3% over line/load/temperature - ensures stable core rail for low-power logic without external feedback resistors. |
| Max Output Current | 250 mA - supports moderate digital loads such as microcontrollers or sensors without external pass devices. |
| Input Voltage Range | 1.8 V to 6.5 V - compatible with single Li-ion (2.7–4.2 V), NiMH, or USB-powered inputs. |
| Peak Efficiency | 90% - minimizes power loss and heat rise in thermally constrained handheld enclosures. |
| Quiescent Current | <40 µA - extends battery shelf life during system standby or deep-sleep modes. |
| Switching Frequency | 600–1200 kHz - enables use of small 0805/1206 ceramic capacitors and reduces EMI filtering burden. |
| Power Good Threshold | 97% of 1.5 V = 1.455 V - provides reliable system reset timing for downstream logic initialization. |
Pinout & Package
TPS60503DGSRG4 is housed in a 10-pin VSSOP package (3.05 mm × 4.98 mm), optimized for compact PCB layouts in portable electronics. Pin functions are validated per TI SLVS391C datasheet Rev. September 2015.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-low logic control: drives high to disable, reducing input current to 0.05 µA and isolating load from input. |
| PG (Pin 2) | Open-drain power-good output | Asserts high when OUT ≥1.455 V; requires external pull-up to VIN or OUT for system reset sequencing. |
| C2F− (Pin 3) | Flying capacitor negative terminal | Connects to negative side of C2F (1 µF ceramic); critical for 0.5x/1/3x charge transfer phases. |
| C2F+ (Pin 4) | Flying capacitor positive terminal | Connects to positive side of C2F; forms second flying stage with C1F for multi-ratio conversion. |
| VIN (Pin 5) | Main input supply | Accepts 1.8–6.5 V; requires 2.2 µF ceramic input capacitor (Ci) for stability and ripple suppression. |
| C1F+ (Pin 6) | Flying capacitor positive terminal | Connects to positive side of C1F (1 µF ceramic); participates in all conversion modes including LDO bypass. |
| OUT (Pin 7) | Regulated output | Delivers fixed 1.5 V; must be bypassed with ≥10 µF ceramic capacitor (Co) for stability at full load. |
| C1F− (Pin 8) | Flying capacitor negative terminal | Connects to negative side of C1F; completes first flying capacitor loop with C2F for charge redistribution. |
| GND (Pin 9) | Ground reference | Common return for input, output, and internal circuitry; requires low-impedance PCB plane connection. |
| FB (Pin 10) | Feedback input | Internally tied to OUT for fixed 1.5-V operation; no external divider required - simplifies layout and BOM. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic multi-mode conversion | Selects LDO, 2/3x, 0.5x, or 1/3x topology dynamically to maintain >85% efficiency across 1.8–6.5 V input range. |
| Integrated power-good supervisor | Open-drain PG pin signals valid regulation at 1.455 V with 100–200 µs delay - enables precise system power sequencing. |
| Thermal and overcurrent protection | Shuts down at 150°C junction temperature and limits short-circuit current to 300 mA - prevents damage during fault conditions. |
| Load isolation in shutdown | Disconnects OUT from VIN when EN = high, limiting leakage to <1 µA - preserves battery charge during storage. |
| Internal soft-start | 80 µs typical startup time with controlled output ramp - avoids inrush current spikes into downstream capacitance. |
Applications
| Portable Medical Sensors | DSP Core Supply |
|---|---|
Use Scenario: Powering ultra-low-power biosensor signal chains (e.g., ECG front-end ASICs) from coin-cell or Li-ion sources. IC Role / Device Role / Timing Role: Generates clean, regulated 1.5-V analog/digital core rail with minimal noise and ripple (<30 mVPP at 150 mA). Use Value: Enables accurate sub-mV signal acquisition by eliminating switching noise coupling into sensitive analog paths. |
Use Scenario: Supplying core voltage for TI C5000/C6000 DSPs requiring 1.5 V at up to 250 mA in handheld audio analyzers. IC Role / Device Role / Timing Role: Primary core regulator with PG output synchronized to DSP reset assertion. Use Value: Eliminates need for external sequencing ICs by providing deterministic power-good timing for DSP boot integrity. |
| USB-Powered Test Peripherals | Industrial Handheld Scanners |
Use Scenario: Converting 5-V USB power to 1.5 V for low-voltage logic in portable oscilloscope probes or logic analyzers. IC Role / Device Role / Timing Role: Step-down charge pump with input voltage range covering USB spec (4.75–5.25 V) and tolerance for cable drop. Use Value: Achieves >88% efficiency at 5 V→1.5 V, reducing thermal load inside sealed probe housings. |
Use Scenario: Powering barcode scanner image sensors and decode processors in ruggedized field units powered by 3.7-V Li-ion packs. IC Role / Device Role / Timing Role: Core voltage regulator supporting wide input variation (3.0–4.3 V) during battery discharge. Use Value: Maintains regulation down to 2.5 V input at 150 mA, extending usable battery runtime by 12% vs. linear solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60502DGSR | Fixed 1.8-V output; higher minimum input voltage (2.8 V at 150 mA) and tighter output tolerance (±3% at 50 mA only). | Suitable where system logic requires 1.8 V I/O rails instead of 1.5 V core; not interchangeable without board-level voltage rework. | Select TPS60502DGSR only if 1.8 V output matches downstream device requirements and input voltage exceeds 2.8 V under worst-case load. |
| MAX17222ETA+ | Inductor-based buck converter; 1.5-V fixed output, 300-mA capability, 2.3–5.5 V input, 92% peak efficiency. | Requires external inductor and diode; larger solution size but lower output ripple (<10 mVPP) and better light-load efficiency. | Choose MAX17222ETA+ when ultra-low noise or higher current (>250 mA) is required, accepting added BOM cost and PCB area. |
Compared with TPS60503DGSRG4, TPS60502DGSR offers higher output voltage but reduced low-input flexibility, while MAX17222ETA+ trades capacitor-only simplicity for superior ripple performance and current headroom - both require schematic and layout revision.
Availability
TPS60503DGSRG4 is available at Aetrix Electronics and suitable for portable medical sensors, USB-powered test peripherals, industrial handheld scanners, and DSP core supply applications requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for TPS60503DGSRG4 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 IC design and high-volume manufacturing.
The TPS6050x family was engineered specifically for space-constrained, battery-powered applications demanding high-efficiency, capacitor-only DC-DC conversion - targeting mobile phones, portable instruments, and USB-powered devices.
FAQ
What is the minimum input voltage required for TPS60503DGSRG4 to deliver 150 mA?
The TPS60503DGSRG4 requires a minimum input voltage of 2.5 V to sustain 150 mA output current while maintaining regulation, as specified in the Device Comparison Table of SLVS391C. Below this threshold, output voltage droop or dropout may occur due to insufficient headroom for the selected 1.5-V output.
Does TPS60503DGSRG4 require external feedback resistors to set its output voltage?
No. The TPS60503DGSRG4 is factory-configured for fixed 1.5-V output; its FB pin is internally connected to OUT, eliminating the need for external resistor dividers. This simplifies layout, reduces BOM count, and improves accuracy versus adjustable variants like TPS60500.
How does the power-good (PG) function behave during startup and shutdown of TPS60503DGSRG4?
During startup, the PG pin remains low until OUT reaches ≥97% of 1.5 V (1.455 V), then transitions high after 100–200 µs delay. During shutdown (EN = high), PG is actively pulled low. An external pull-up resistor (to VIN or OUT) is required for proper logic-level signaling to downstream reset controllers.
Can TPS60503DGSRG4 operate with input voltages below 1.8 V?
No. The absolute minimum recommended input voltage is 1.8 V per Section 7.3 of SLVS391C. Operation below this violates recommended operating conditions and may result in failure to start, unstable regulation, or undefined behavior - especially critical for Li-ion cells discharging below 2.5 V.
What ceramic capacitor values are mandatory for stable operation of TPS60503DGSRG4 at 250 mA?
At 250 mA maximum load, TPS60503DGSRG4 requires CIN = 4.7 µF, C1F = C2F = 1 µF, and COUT ≥22 µF (e.g., two parallel 10-µF ceramics). Using smaller output capacitance risks instability, excessive ripple (>30 mVPP), or premature current limiting under transient loads.
TPS60503DGSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 250mA
- Frequency - Switching:
- 800kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
TPS60503DGSRG4 FAQ
1.How can I place an order for TPS60503DGSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60503DGSRG4 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 TPS60503DGSRG4 reliable?
The price and inventory of TPS60503DGSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60503DGSRG4 is usually 5 days.
3.What payment methods are accepted for TPS60503DGSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60503DGSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60503DGSRG4?
TPS60503DGSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60503DGSRG4 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 TPS60503DGSRG4?
For technical support, including TPS60503DGSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60503DGSRG4 requirements.
6.How does Aetrix verify that TPS60503DGSRG4 is sourced from the original manufacturer or authorized distributors?
All TPS60503DGSRG4 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 TPS60503DGSRG4 meets industry standards.
7.What is the process for return or replacement of TPS60503DGSRG4?
All TPS60503DGSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS60503DGSRG4, 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 TPS60503DGSRG4 part is unused and in its original packaging.
Return procedure for TPS60503DGSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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