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Texas Instruments TPS60503DGSR
- Part No.:
- TPS60503DGSR
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS60503DGSR.pdf
- Description:
- IC REG CHARGE PUMP 1.5V 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,849
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Product details
Overview
TPS60503DGSR from Texas Instruments is a fixed-output 1.5-V, high-efficiency step-down charge pump DC-DC converter optimized for space-constrained battery-powered systems. It delivers up to 250 mA output current with ≤3% output voltage tolerance over line, load, and temperature, supports 1.8 V–6.5 V input, and integrates power-good supervision and thermal/overcurrent protection. It is used in portable instrumentation requiring stable low-voltage rail generation from single Li-ion cells.
For engineers reviewing the TPS60503DGSR datasheet, TPS60503DGSR pinout, TPS60503DGSR application, or TPS60503DGSR equivalent, key selection criteria include minimum input voltage (≥2.5 V at 150 mA), 10-pin VSSOP package footprint, automatic multi-mode conversion (1/3x, 0.5x, 2/3x, LDO), and open-drain PG signal timing (97% VOUT trip, 100–200 µs positive ramp delay).
Technical Context
The TPS60503DGSR implements switched-capacitor fractional conversion using two flying capacitors (C1F, C2F) and internal MOSFET switches to achieve up to 90% efficiency across wide input/output ratios. Its control logic automatically selects among four conversion modes-1/3x, 0.5x, 2/3x, and LDO-based on VIN/VOUT ratio and load current, enabling regulation without inductors.
Regulation is maintained via an error amplifier comparing FB voltage (internally tied to OUT for fixed 1.5 V) against a 0.8-V reference. The device includes soft-start, <40 µA quiescent current, and shutdown isolation that disconnects load from input, reducing battery leakage to <0.5 µA when EN is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±3% over line, load, and −40°C to +125°C - ensures stable core supply for low-power DSPs and microcontrollers. |
| Max Output Current | 250 mA - supports moderate digital loads such as USB peripherals or audio codecs without external LDO buffering. |
| Input Voltage Range | 1.8 V to 6.5 V - compatible with single-cell Li-ion (2.7–4.2 V), NiMH, or dual alkaline supplies. |
| Efficiency | Up to 90% - minimizes heat rise and extends battery runtime in portable instruments and mobile phones. |
| Quiescent Current | <40 µA - enables ultra-low standby power for always-on sensor nodes or wake-on-event systems. |
| Switching Frequency | 600–1200 kHz - allows use of small 1-µF ceramic flying capacitors and reduces EMI compared to lower-frequency charge pumps. |
| Power Good Threshold | 97% of nominal VOUT (≈1.455 V) - provides reliable system reset signaling before processor initialization. |
Pinout & Package
TPS60503DGSR is housed in a 10-pin VSSOP package (3.05 mm × 4.98 mm), thermally enhanced for surface-mount assembly in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-low logic control: high = shutdown (input/output isolated, IIN < 0.5 µA); low = operational. |
| PG (Pin 2) | Open-drain power good | Asserts high when VOUT ≥ 1.455 V; requires external pull-up to VIN or VOUT for system monitoring/reset sequencing. |
| C2F− (Pin 3) | Flying capacitor negative terminal | Connects to negative side of C2F; forms part of 2-phase charge transfer network for 1/3x and 0.5x modes. |
| C2F+ (Pin 4) | Flying capacitor positive terminal | Connects to positive side of C2F; critical for capacitor charging/discharging sequence in all conversion modes. |
| VIN (Pin 5) | Main input supply | Accepts 1.8–6.5 V; must be bypassed with ≥2.2 µF ceramic capacitor to suppress switching noise and stabilize input impedance. |
| C1F+ (Pin 6) | Flying capacitor positive terminal | Connects to positive side of C1F; works with C2F to enable fractional voltage division without inductors. |
| OUT (Pin 7) | Regulated output | Delivers 1.5 V; requires ≥10 µF ceramic output capacitor (≥22 µF for >150 mA) to maintain stability and limit ripple to ≤30 mVPP. |
| C1F− (Pin 8) | Flying capacitor negative terminal | Connects to negative side of C1F; completes dual-capacitor charge-pump topology enabling high-efficiency step-down. |
| GND (Pin 9) | Ground reference | Common return for input, output, and internal circuitry; must be low-impedance plane to minimize noise coupling. |
| FB (Pin 10) | Feedback input | Internally connected to OUT for fixed 1.5 V operation; not user-configurable - eliminates external resistor divider. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-mode fractional conversion | Automatically selects 1/3x, 0.5x, 2/3x, or LDO mode based on VIN/VOUT ratio and load - maintains >85% efficiency from 2.5 V to 6.5 V input at 150 mA. |
| Integrated power-good supervisor | Open-drain PG pin asserts high at 97% VOUT with 100–200 µs delay on ramp-up - enables precise power sequencing in multi-rail systems. |
| Thermal and overcurrent protection | Shuts down output current above 150°C junction temp or limits short-circuit current to 300 mA - prevents damage during fault conditions. |
| Shutdown isolation | Disconnects load from input when EN = high, limiting leakage to <1 µA - preserves battery shelf life in storage or deep-sleep states. |
| Inductorless design | Uses only four external ceramic capacitors (CIN, C1F, C2F, COUT) - eliminates magnetic components, reduces EMI, and saves board area. |
Applications
| Portable Instrumentation | USB-Powered Peripherals |
|---|---|
|
Use Scenario: Handheld multimeters and portable oscilloscopes powered by single Li-ion cells require clean, regulated 1.5-V analog front-end rails. IC Role / Device Role / Timing Role: TPS60503DGSR generates stable 1.5-V supply from 2.7–4.2 V battery, replacing inefficient linear regulators while maintaining low noise for precision ADC references. Use Value: Achieves 88% efficiency at 100 mA and 3.3 V input, reducing thermal load and extending battery life by >30% versus LDO solutions. |
Use Scenario: USB bus-powered audio interfaces need 1.5-V core voltage for low-power DACs and clock buffers without violating USB 500-mA current limit. IC Role / Device Role / Timing Role: TPS60503DGSR converts 5 V USB input to 1.5 V with automatic 0.5x mode activation, minimizing input current draw during peak audio processing. Use Value: Delivers 250 mA at 90% efficiency, allowing full-feature operation within USB power budget while avoiding host port overcurrent faults. |
| Digital Signal Processor (DSP) Core Supply | Mobile Phone Baseband Subsystem |
|
Use Scenario: DSPs with 1.5-V core voltage (e.g., TI C55xx) require tightly regulated, low-noise supply with fast transient response for real-time signal processing. IC Role / Device Role / Timing Role: TPS60503DGSR provides regulated 1.5 V with <30 mVPP ripple and 100 µs PG assertion - synchronizes cleanly with DSP reset and boot sequence. Use Value: Load transient response holds VOUT within ±3% for 15→135 mA steps, eliminating need for additional output capacitance or post-regulation. |
Use Scenario: Mobile phone baseband ICs demand ultra-low quiescent current in sleep mode while supporting burst-mode RF transmission at 150 mA. IC Role / Device Role / Timing Role: TPS60503DGSR operates in skip-mode below 150 mA (IQ < 40 µA), then transitions seamlessly to linear regulation during transmit bursts. Use Value: Reduces average system current by 65% versus fixed-frequency charge pumps, directly improving standby time in GSM/UMTS handsets. |
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; minimum input voltage 2.8 V at 150 mA - higher VOUT and VIN threshold than TPS60503DGSR. | Suitable for 1.8-V microcontroller cores but incompatible where 1.5-V logic levels or tighter input range (e.g., 2.5–3.6 V LiFePO₄) are required. | Select TPS60502DGSR only if system requires 1.8 V and can guarantee VIN ≥ 2.8 V under all operating conditions. |
| MAX17222ETA+ | 1.5-V fixed output, 300-mA capability, 2.3–5.5 V input, 0.9-µA IQ - wider input range and lower quiescent current, but uses different pinout and requires external feedback resistors for adjustability. | Better suited for ultra-low-power IoT sensors; lacks integrated PG and has no 1/3x mode - less efficient below 3 V input. | Choose MAX17222ETA+ for sub-µA standby systems with VIN ≥ 2.3 V; retain TPS60503DGSR for cost-sensitive, space-constrained designs needing PG and multi-mode efficiency. |
Compared with TPS60502DGSR and MAX17222ETA+, the TPS60503DGSR uniquely balances 1.5-V precision, 2.5-V minimum input compatibility, integrated power-good signaling, and automatic 1/3x mode for highest efficiency in low-input, low-VOUT battery systems - making it optimal for Li-ion–powered portable instrumentation.
Availability
TPS60503DGSR is available at Aetrix Electronics and suitable for portable instrumentation, USB-powered peripherals, DSP core supplies, and mobile phone baseband subsystems requiring stable component supply with consistent parametric performance and long-term lifecycle support.
Supply support for TPS60503DGSR 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 decades of expertise in high-efficiency DC-DC conversion.
The TPS6050x family was designed specifically for space-critical, battery-powered applications requiring regulated low-voltage rails without inductors - targeting mobile phones, portable instruments, and USB peripherals.
FAQ
What is the minimum input voltage required for TPS60503DGSR to deliver 150 mA?
The TPS60503DGSR requires a minimum input voltage of 2.5 V to sustain 150 mA output current, as specified in the device comparison table and validated across temperature. Below this threshold, regulation cannot be maintained due to insufficient headroom for the 1/3x and 0.5x conversion modes. Operation at 2.4 V may result in output droop or dropout, especially at elevated temperatures.
Does TPS60503DGSR require external feedback resistors to set its output voltage?
No, the TPS60503DGSR does not require external feedback resistors. It is a fixed 1.5-V output variant with internal resistor divider connected to the FB pin, which is internally tied to OUT. Unlike the adjustable TPS60500DGSR, the TPS60503DGSR's FB pin is not user-accessible for voltage programming - simplifying layout and reducing BOM count.
How does the power-good (PG) pin of TPS60503DGSR behave during startup and shutdown?
The PG pin of TPS60503DGSR is an open-drain output that remains low during shutdown and initial startup. It transitions high only after VOUT reaches ≥97% of 1.5 V (≈1.455 V), with a typical positive-ramp delay of 100–200 µs. During shutdown (EN high), PG is actively pulled low - providing unambiguous reset signaling for downstream logic without external pull-down components.
Can TPS60503DGSR operate from a 2.7-V Li-ion cell throughout its discharge curve?
Yes, the TPS60503DGSR supports continuous operation from a 2.7-V Li-ion cell down to 2.5 V input, delivering full 150 mA output. Its 1/3x conversion mode enables regulation even at low VIN/VOUT ratios, and its LDO mode maintains output stability as the cell discharges below 3 V - making it ideal for single-cell portable systems with extended runtime requirements.
What ceramic capacitor values are recommended for TPS60503DGSR at 250 mA output?
For 250 mA output, TI recommends 4.7 µF input capacitor (CIN), two 1-µF flying capacitors (C1F, C2F), and ≥22 µF total output capacitance (COUT) - achievable with two parallel 10-µF/6.3-V X5R/X7R ceramics. These values ensure stability, limit output ripple to ≤30 mVPP, and prevent premature current limiting in linear regulation mode.
TPS60503DGSR 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
TPS60503DGSR FAQ
1.How can I place an order for TPS60503DGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS60503DGSR 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 TPS60503DGSR reliable?
The price and inventory of TPS60503DGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS60503DGSR is usually 5 days.
3.What payment methods are accepted for TPS60503DGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS60503DGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS60503DGSR?
TPS60503DGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS60503DGSR 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 TPS60503DGSR?
For technical support, including TPS60503DGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS60503DGSR requirements.
6.How does Aetrix verify that TPS60503DGSR is sourced from the original manufacturer or authorized distributors?
All TPS60503DGSR 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 TPS60503DGSR meets industry standards.
7.What is the process for return or replacement of TPS60503DGSR?
All TPS60503DGSR units undergo pre-shipment inspection (PSI). If there is an issue with TPS60503DGSR, 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 TPS60503DGSR part is unused and in its original packaging.
Return procedure for TPS60503DGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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