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Texas Instruments TPS61175PWP
- Part No.:
- TPS61175PWP
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS61175PWP.pdf
- Description:
- IC REG BST FLYBACK ADJ 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,267
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Product details
Overview
TPS61175PWP from Texas Instruments is a monolithic 3-A, 40-V synchronous boost converter IC with current-mode PWM control, programmable 200 kHz–2.2 MHz switching frequency, soft-start, and integrated low-side N-channel MOSFET. It supports boost, SEPIC, and flyback topologies for high-voltage DC-DC conversion in space-constrained industrial power supplies.
For engineers reviewing the TPS61175PWP datasheet, TPS61175PWP pinout, TPS61175PWP application, or TPS61175PWP equivalent, key selection criteria include input voltage range (2.9 V–18 V), output capability up to 38 V, thermal performance in HTSSOP-14 PowerPad™, and compatibility with WEBENCH® Power Designer for rapid design validation.
Technical Context
The TPS61175PWP implements current-mode pulse width modulation with slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its internal 40-V, 3-A N-channel MOSFET switch features 0.13 Ω typical RDS(ON) at VGS = 3.6 V and supports discontinuous conduction mode (DCM) with pulse-skipping regulation at light load.
Switching frequency is set via external resistor on FREQ pin (200 kHz–2.2 MHz) or synchronized to external clock on SYNC pin (±20% tolerance). Soft-start is implemented by 6 μA internal bias current charging an external capacitor on SS pin, clamping COMP output until 1.8 V is reached.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9 V to 18 V - supports multicell battery inputs and regulated 5/12-V rails without pre-regulation |
| Output Voltage Range | Up to 38 V - enables direct generation of 24-V or 35-V system rails from 5-V or 12-V sources |
| Switch Current Limit | 3 A (typ), 3.8 A (max) - sets peak inductor current limit for overcurrent protection and transient handling |
| Switching Frequency | 200 kHz to 2.2 MHz - adjustable via external resistor; higher frequencies reduce inductor size but require careful layout |
| Feedback Reference | 1.229 V (typ) - precise internal reference enables accurate output voltage setting with standard resistor dividers |
| Quiescent Current | 3.5 mA - defines no-load power loss in active operation; critical for standby efficiency in always-on systems |
| Thermal Resistance | RθJA = 45.2 °C/W - quantifies junction-to-ambient heat dissipation in standard PCB layout with PowerPad soldered |
Pinout & Package
TPS61175PWP is housed in a 14-pin HTSSOP package (5.00 mm × 4.40 mm) with exposed thermal PowerPad™ requiring connection to analog ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1,2) | Switch node | Connects directly to inductor and catch diode anode; carries high di/dt switching current - requires short, low-inductance routing |
| VIN (3) | Input supply | Accepts 2.9–18 V input; decoupled with ≥4.7 μF ceramic capacitor close to pin |
| EN (4) | Enable control | Logic-high (>1.2 V) enables operation; internal 800-kΩ pull-down ensures default-off state when floating |
| SS (5) | Soft-start timing | 6 μA internal current charges external capacitor; 47 nF yields ~4 ms soft-start time and eliminates overshoot |
| SYNC (6) | External clock sync | Accepts 5-V logic-level clock signal; must be tied to AGND if unused to prevent noise coupling |
| AGND (7) | Analog ground | Reference for error amplifier and feedback circuitry; separate from PGND to minimize noise injection |
| COMP (8) | Error amplifier output | Drives external RC compensation network to stabilize control loop; connects to transconductance amplifier output |
| FB (9) | Feedback input | Senses output voltage via resistor divider; regulated to 1.229 V reference for precision output setting |
| FREQ (10) | Frequency programming | Resistor-connected pin sets oscillator frequency; 80 kΩ yields 1.2 MHz - critical for EMI and efficiency trade-offs |
| NC (11) | No-connect | Reserved pin; must be connected to ground per datasheet to avoid floating node issues |
| PGND (12,13,14) | Power ground | Source connection for internal MOSFET; multiple pins reduce ground impedance and improve thermal path |
Key Features
| Feature | Design Value |
|---|---|
| Programmable soft start | Capacitor-controlled ramp limits inrush current and prevents output overshoot during startup |
| Pulse-skipping light-load mode | Reduces switching frequency to 1/4 of nominal value under overload or light-load conditions to maintain regulation |
| Integrated 3-A, 40-V MOSFET | Eliminates need for external high-voltage switch; reduces BOM count and board area in high-output-voltage designs |
| Synchronous frequency synchronization | Enables EMI reduction by locking switching frequency to system clock or spread-spectrum source |
| Current-mode PWM with slope compensation | Ensures stable operation across wide duty-cycle range (up to 89%) and prevents subharmonic oscillation |
Applications
| ADSL Modem Power Supply | TV Tuner Bias Generation |
|---|---|
Use Scenario: Generating isolated 24-V rail from 5-V USB or 12-V wall adapter for ADSL line driver amplifiers. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated high-voltage bias for analog front-end components. Use Value: Enables single-rail input architecture while meeting stringent 38-V output requirement and maintaining >90% efficiency at 200-mA load. | Use Scenario: Converting 5-V microcontroller supply to 35-V tuning voltage for varactor diodes in digital TV tuner modules. IC Role / Device Role / Timing Role: High-precision, low-noise boost converter delivering stable tuning voltage with minimal ripple. Use Value: Achieves 35-V output with <1.25% FB reference accuracy and supports SEPIC topology for input/output isolation. |
| Industrial Sensor Interface | Portable Medical Instrument |
Use Scenario: Powering 24-V industrial current-loop transmitters (4–20 mA) from 3.3-V or 5-V battery-backed MCU rails. IC Role / Device Role / Timing Role: Compact, thermally robust boost stage enabling field-powered sensor nodes with extended runtime. Use Value: Delivers 3-A peak current capability and 45.2 °C/W thermal resistance allows continuous 24-V/500-mA operation on 2-layer PCBs. | Use Scenario: Providing 12-V and 24-V auxiliary rails for ultrasound transducer drivers and display backlight in handheld diagnostic devices. IC Role / Device Role / Timing Role: Dual-output-capable boost controller supporting stacked or cascaded configurations for multi-rail medical subsystems. Use Value: Supports programmable soft start (via SS pin) to prevent inrush-induced brownout in battery-sensitive applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 10-A switch current, 2.7–12-V input, fixed 500-kHz/1-MHz switching; no SYNC or FREQ pin | Better suited for high-current, lower-input-voltage applications (e.g., USB PD power banks); lacks programmable frequency | Select TPS61088RHLR when >5-A output current is required and input stays below 12 V; TPS61175PWP remains preferred for 18-V input or 35-V+ outputs. |
| LM3478MM/NOPB | External MOSFET controller, 2.97–40-V input, 1-MHz max frequency, no integrated switch or soft start | Requires external high-voltage FET and gate driver; offers greater flexibility in switch selection but increases BOM and layout complexity | Choose LM3478MM/NOPB when custom high-efficiency discrete switch implementation is needed or thermal constraints exceed HTSSOP limits. |
Compared with TPS61088RHLR and LM3478MM/NOPB, the TPS61175PWP uniquely balances integrated 40-V/3-A switching, wide 2.9–18-V input, programmable frequency, and soft-start control - making it optimal for compact, high-output-voltage boost designs where layout area and component count are constrained.
Availability
TPS61175PWP is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical instruments, ADSL modem power supplies, and TV tuner bias generation requiring stable component supply across long production lifecycles.
Supply support for TPS61175PWP 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 company specializing in analog, embedded processing, and power management solutions with broad industrial and automotive design expertise.
The TPS61175 product line delivers high-voltage, high-current boost converters optimized for space-constrained applications requiring outputs beyond 24 V - such as telecom line drivers, broadcast tuners, and industrial automation sensors.
FAQ
What is the maximum output voltage supported by the TPS61175PWP?
The TPS61175PWP supports output voltages up to 38 V, as confirmed by its 40-V internal N-channel MOSFET rating and absolute maximum SW pin voltage of 40 V. This enables reliable generation of 24-V and 35-V rails from common 5-V or 12-V inputs. The device regulates using current-mode PWM with 1.229-V feedback reference, ensuring stable operation across the full output range. Designers must verify inductor saturation current and output capacitor voltage rating for each target output voltage.
How does the soft-start function work on the TPS61175PWP?
The TPS61175PWP implements soft-start via a 6-μA internal current source charging an external capacitor on the SS pin. As the SS voltage ramps from 0 V to 1.8 V, it clamps the COMP pin output, limiting PWM duty cycle and preventing inrush current. A 47-nF capacitor yields ~4 ms soft-start time and eliminates output overshoot in typical 5-V-to-24-V designs. During shutdown, the SS capacitor discharges through a 5-kΩ internal resistor after EN is held low for 10 ms - ensuring repeatable startup behavior.
Can the TPS61175PWP operate in SEPIC or flyback topologies?
Yes, the TPS61175PWP is explicitly designed to support SEPIC and flyback topologies in addition to standard boost, as stated in its official description and application sections. Its integrated 40-V, 3-A low-side switch and current-mode control architecture enable flexible configuration for non-inverting or isolated high-voltage conversion. TI provides reference schematics and design equations for both SEPIC and flyback modes in the datasheet's Application and Implementation section, confirming functional support beyond basic boost operation.
What is the purpose of the NC pin on the TPS61175PWP?
The NC (No Connect) pin (Pin 11) on the TPS61175PWP is a reserved terminal that must be connected to ground per the datasheet's Pin Functions table. It is not internally connected and serves no active circuit function, but grounding prevents floating-node noise coupling and ensures predictable ESD behavior. Leaving this pin unconnected violates recommended layout practices and may degrade noise immunity or cause erratic startup behavior in high-noise environments.
Does the TPS61175PWP support external frequency synchronization?
Yes, the TPS61175PWP supports external frequency synchronization via the SYNC pin (Pin 6), which accepts a 5-V logic-level clock signal. When used, the internal oscillator is disabled and switching frequency locks to the external clock within ±20% tolerance. An external resistor must still be connected to the FREQ pin for proper biasing. This feature enables EMI reduction through frequency alignment with system clocks or spread-spectrum sources - a capability not present in many competing boost controllers.
TPS61175PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 2.9V
- Voltage - Output (Max):
- 38V
- Current - Output:
- 3A (Switch)
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS61175PWP FAQ
1.How can I place an order for TPS61175PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61175PWP 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 TPS61175PWP reliable?
The price and inventory of TPS61175PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61175PWP is usually 5 days.
3.What payment methods are accepted for TPS61175PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61175PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61175PWP?
TPS61175PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61175PWP 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 TPS61175PWP?
For technical support, including TPS61175PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61175PWP requirements.
6.How does Aetrix verify that TPS61175PWP is sourced from the original manufacturer or authorized distributors?
All TPS61175PWP 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 TPS61175PWP meets industry standards.
7.What is the process for return or replacement of TPS61175PWP?
All TPS61175PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS61175PWP, 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 TPS61175PWP part is unused and in its original packaging.
Return procedure for TPS61175PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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