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Texas Instruments TPS6735IP
- Part No.:
- TPS6735IP
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TPS6735IP.pdf
- Description:
- IC REG BUCK -5V 200MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,378
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Product details
Overview
TPS6735IP from Texas Instruments is a fixed-frequency, current-mode PWM inverting DC/DC converter delivering −5 V at up to 200 mA from a 4-V to 6.2-V input. It integrates a 0.4-Ω p-channel MOSFET power switch, 1.22-V reference output (125 µA capable), soft-start control, and enable shutdown with 1-µA quiescent current. It targets board-level negative rail generation in computer peripherals and battery-powered systems.
For engineers reviewing the TPS6735IP datasheet, TPS6735IP pinout, TPS6735IP application, or TPS6735IP equivalent, key selection criteria include its inverting topology, −5-V regulated output, 160-kHz fixed switching frequency, SOIC/PDIP package compatibility, and EN-controlled low-power shutdown mode.
Technical Context
The TPS6735IP implements a current-mode PWM architecture with slope compensation, using an internal 160-kHz oscillator and a high-side p-channel MOSFET with integrated current sensing. Its error amplifier compares FB voltage against a 1.22-V internal reference, while the COMP pin enables loop stabilization via external RC compensation.
Undervoltage lockout activates below 3.7 V on VCC, and overcurrent protection trips at 2 A peak switch current. The EN input directly controls device enable/disable state, discharging the SS capacitor through a 1.2-MΩ internal resistor during shutdown to ensure controlled output decay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | −5 V ±5% (regulated across 0–200 mA load and 4.5–6.2 V input) |
| Switching frequency | 160 kHz fixed (enables predictable EMI filtering and inductor sizing) |
| Input voltage range | 4 V to 6.2 V (supports single-cell Li-ion or 5-V rail with margin) |
| Max output current | 200 mA continuous (derates above 70°C ambient per DIP package dissipation rating) |
| Quiescent current | 1.9 mA no-load; 1 µA in EN-shutdown (extends battery life in standby) |
| Reference output | 1.22 V ±1%, 125 µA max (supports external biasing without additional LDO) |
| Power switch RDS(on) | 0.4 Ω typical (minimizes conduction loss in inverting buck-boost topology) |
Pinout & Package
TPS6735IP is supplied in an 8-pin plastic dual-in-line package (PDIP-P), JEDEC MS-001 compliant, with 0.300-inch body width and 0.100-inch lead pitch. Pin 1 is marked by a notch or dot; leads are tin-lead (NIPDAU) finish, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Logic-high (>2 V) enables operation; logic-low (≤0.4 V) forces shutdown and reduces supply current to ≤1 µA |
| REF (Pin 2) | 1.22-V reference output | Stable voltage source for external circuitry; capable of sourcing up to 125 µA with ≤50 ppm/°C drift |
| SS (Pin 3) | Soft-start timing node | Capacitor to GND sets startup ramp rate; internally pulled to REF via 1.2-MΩ resistor |
| COMP (Pin 4) | Error amplifier compensation | Connects to GND via 82-pF capacitor (≥100 mA loads) to stabilize feedback loop dynamics |
| FB (Pin 5) | Feedback sense input | Monitors output voltage via resistive divider; referenced to GND, not VCC or OUT |
| GND (Pin 6) | Power and signal ground | Common return path for VCC, REF, SS, COMP, FB, and internal circuits |
| OUT (Pin 7) | Power switch drain | High-current node connecting to external inductor and Schottky rectifier; carries peak currents up to 2 A |
| VCC (Pin 8) | Input supply voltage | Accepts 4–6.2 V; powers internal circuitry and gate driver; UVLO threshold is 3.7 V |
Key Features
| Feature | Design Value |
|---|---|
| Inverting DC/DC topology | Generates isolated −5 V output from positive input without transformer; simplifies PCB layout vs. flyback |
| Integrated p-channel MOSFET | 0.4-Ω RDS(on) switch eliminates external high-side driver; gate driven by −5 V output for area efficiency |
| Current-mode PWM control | Enables cycle-by-cycle current limiting, fast transient response, and stable operation with wide input/output ratios |
| Enable + soft-start | EN pin allows system-level power sequencing; SS capacitor prevents inrush current and output overshoot |
| 1.22-V precision reference | Low-drift (50 ppm/°C), buffered output supports auxiliary analog functions without extra ICs |
Applications
| Computer Peripherals | Battery-Powered Test Equipment |
|---|---|
Use Scenario: Generating −5 V for RS-232 line drivers in USB-to-serial adapters or docking stations. IC Role / Device Role / Timing Role: Inverting DC/DC converter providing isolated negative rail from 5-V USB bus. Use Value: Eliminates need for charge-pump ICs or discrete transformer-based solutions-reduces BOM count and improves efficiency to 78% at 100 mA. | Use Scenario: Powering op-amp rails and ADC reference in handheld multimeters or portable oscilloscopes. IC Role / Device Role / Timing Role: Negative voltage generator enabling bipolar analog signal conditioning from single-cell lithium battery. Use Value: 1-µA shutdown current extends battery runtime; soft-start prevents measurement offset during power-up. |
| Industrial I/O Modules | Legacy System Voltage Translation |
Use Scenario: Supplying −5 V for analog front-end circuitry in programmable logic controller (PLC) input modules. IC Role / Device Role / Timing Role: Regulated inverter supporting precision sensor biasing and signal conditioning in noisy industrial environments. Use Value: Current-mode control ensures stable regulation under varying load transients; EN pin enables firmware-controlled rail disable during sleep modes. | Use Scenario: Replacing obsolete −5 V supplies in legacy instrumentation requiring TTL-compatible negative logic levels. IC Role / Device Role / Timing Role: Pin-compatible upgrade for MAX735-based designs needing identical footprint and electrical behavior. Use Value: Direct drop-in replacement with identical 8-pin PDIP layout, same EN/REF/SS pin functions, and matching −5 V output tolerance (±5%). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX735CPA+ | Same 8-pin PDIP package, −5 V output, 200 mA, but uses external N-channel MOSFET and requires bootstrap capacitor | Lacks integrated p-channel switch and REF output; needs more external components | Choose when legacy MAX735 design reuse is required and board space permits added discretes |
| TPS6735ID | Identical electrical specs and pinout, but in 8-pin SOIC (D) package instead of PDIP (P) | SOIC offers smaller footprint and surface-mount assembly; thermal resistance differs (D: 5.8 mW/°C derating) | Prefer for new SMT designs where density and automated assembly outweigh through-hole serviceability |
Compared with MAX735CPA+, TPS6735IP reduces component count via integrated MOSFET and adds a usable 1.22-V reference; compared with TPS6735ID, it retains through-hole manufacturability and higher thermal mass for prototyping or low-volume production.
Availability
TPS6735IP is available at Aetrix Electronics and suitable for computer peripherals, battery-powered test equipment, and industrial I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for TPS6735IP 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-reliability DC/DC conversion.
The TPS6735IP belongs to TI's legacy power management portfolio designed specifically for compact, efficient inverting DC/DC conversion in cost-sensitive and space-constrained applications.
FAQ
What is the maximum load current supported by the TPS6735IP?
The TPS6735IP delivers up to 200 mA continuously across its full operating temperature range (−40°C to 85°C) when used with recommended external components (10-µH inductor, 100-µF output capacitor, 1N5817 Schottky diode). Peak switch current is limited to 2 A, and maximum load decreases slightly above 70°C ambient due to package power dissipation limits (611 mW at 85°C for PDIP).
Does the TPS6735IP require external compensation components?
Yes, the TPS6735IP requires an 82-pF capacitor between COMP (Pin 4) and GND to stabilize the feedback loop for loads exceeding 100 mA. For lighter loads (≤100 mA), this capacitor is optional. Additional compensation may be needed for specific ESR/ESL conditions, but the base design relies on that single capacitor for stability.
Can the TPS6735IP generate output voltages other than −5 V?
No-the TPS6735IP is a fixed-output inverting converter with internal feedback set for −5 V regulation. It does not support adjustable output via external resistor dividers. For variable outputs, consider TI's TPS6734 or other adjustable inverting controllers-not the TPS6735IP.
What is the purpose of the REF pin on the TPS6735IP?
The REF pin on the TPS6735IP provides a buffered 1.22-V reference voltage capable of sourcing up to 125 µA. It is intended for biasing external circuitry such as op-amps, comparators, or ADC references-eliminating the need for a separate voltage reference IC in many designs.
Is the TPS6735IP pin-compatible with the MAX735 series?
Yes-the TPS6735IP is explicitly documented as pin-for-pin compatible with the MAX735 family (e.g., MAX735CPA+), sharing identical 8-pin PDIP pinout, terminal functions (EN, REF, SS, COMP, FB, GND, OUT, VCC), and −5 V output specification. No PCB changes are required when substituting TPS6735IP into existing MAX735 layouts.
TPS6735IP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Negative
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 6.2V
- Voltage - Output (Min/Fixed):
- -5V
- Voltage - Output (Max):
- -
- Current - Output:
- 200mA
- Frequency - Switching:
- 160kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TPS6735IP FAQ
1.How can I place an order for TPS6735IP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6735IP 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 TPS6735IP reliable?
The price and inventory of TPS6735IP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6735IP is usually 5 days.
3.What payment methods are accepted for TPS6735IP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6735IP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6735IP?
TPS6735IP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6735IP 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 TPS6735IP?
For technical support, including TPS6735IP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6735IP requirements.
6.How does Aetrix verify that TPS6735IP is sourced from the original manufacturer or authorized distributors?
All TPS6735IP 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 TPS6735IP meets industry standards.
7.What is the process for return or replacement of TPS6735IP?
All TPS6735IP units undergo pre-shipment inspection (PSI). If there is an issue with TPS6735IP, 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 TPS6735IP part is unused and in its original packaging.
Return procedure for TPS6735IP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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