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Texas Instruments TPS6735IPE4
- Part No.:
- TPS6735IPE4
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TPS6735IPE4.pdf
- Description:
- IC REG BUCK -5V 200MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,435
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Product details
Overview
TPS6735IPE4 from Texas Instruments is a fixed-frequency, current-mode PWM inverting DC/DC converter delivering −5 V at up to 200 mA from a 4.5–6.2 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. Used in board-level negative rail generation for computer peripherals and battery-powered systems requiring high efficiency (78% typical at 100 mA).
For engineers reviewing the TPS6735IPE4 datasheet, TPS6735IPE4 pinout, TPS6735IPE4 application, or TPS6735IPE4 equivalent, this page provides verified technical context, validated pin functions, real-world operating parameters, and confirmed alternative options for negative-output DC/DC conversion in industrial and embedded designs.
Technical Context
The TPS6735IPE4 implements a 160-kHz fixed-frequency current-mode PWM architecture with slope-compensated control, using an internal p-channel MOSFET (RDS(on) = 0.4 Ω) driven by the −5-V output rail to minimize die area. Its error amplifier compares FB-sampled output voltage against a 1.22-V internal reference, feeding a PWM comparator that resets the drive latch when the current-sense signal exceeds the error voltage.
Functional blocks include undervoltage lockout (UVLO threshold = 3.7 V), overcurrent protection (2-A peak trip), soft-start clamping (via SS pin and 1.2-MΩ internal pullup to REF), and EN-controlled shutdown that discharges the soft-start capacitor and reduces supply current to ≤1 µA. The device operates across −40°C to 85°C and supports external compensation via COMP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | −5 V nominal; regulated between −4.75 V and −5.25 V across 0–200 mA load and 4.5–6.2 V input. |
| Input voltage range | 4 V to 6.2 V; UVLO engages below 3.7 V to prevent erratic startup or MOSFET conduction. |
| Switching frequency | 160 kHz fixed; enables predictable EMI filtering and compact magnetics (e.g., 10-µH inductor). |
| Efficiency | 78% typical at 100 mA load and 5-V input; optimized for low-quiescent, battery-sensitive applications. |
| Quiescent current | 1.9 mA at no-load; drops to ≤1 µA in EN-low shutdown mode for ultra-low standby power. |
| Reference output | 1.22 V ±1%, sourcing up to 125 µA; usable as precision bias for external circuitry without added regulator. |
| Power switch RDS(on) | 0.4 Ω typical at 25°C; limits conduction loss and enables 200-mA continuous output with thermal margin in PDIP package. |
Pinout & Package
TPS6735IPE4 is supplied in an 8-pin plastic dual-in-line package (PDIP-P), JEDEC MS-001 compliant, with through-hole mounting and 0.300-inch body width. Pin 1 is located at the left end of the top row when viewed from the component side with notch or dot orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable logic input | High (>2 V) enables operation; 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 biasing; capable of sourcing 125 µA with ≤50 ppm/°C drift. |
| SS (Pin 3) | Soft-start control node | Capacitor to GND sets ramp rate; internal 1.2-MΩ pullup to REF controls current-limit rise during startup. |
| COMP (Pin 4) | Compensation node | Connects to error amplifier output; 82-pF capacitor to GND stabilizes feedback loop for loads >100 mA. |
| FB (Pin 5) | Feedback input | Connects externally to output node; senses −5 V rail via resistive divider to regulate output voltage. |
| GND (Pin 6) | Power and signal ground | Common return for all internal circuits; requires low-impedance PCB ground plane for noise immunity. |
| OUT (Pin 7) | Power switch drain | Drain of integrated p-channel MOSFET; connects to inductor and Schottky rectifier cathode in inverting topology. |
| VCC (Pin 8) | Supply input | Accepts 4–6.2 V input; powers internal circuitry and gate driver; bypassed with 1-µF ceramic + 47-µF tantalum. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated p-channel MOSFET | 0.4-Ω RDS(on) eliminates external high-side switch and simplifies layout in inverting buck-boost topology. |
| 1.22-V precision reference | Externally accessible, stable to 50 ppm/°C, supports auxiliary analog circuitry without extra ICs. |
| Current-mode PWM control | Enables inherent cycle-by-cycle current limiting, fast transient response, and stable operation with varying input/output conditions. |
| Soft-start with SS pin | Programmable delay via external capacitor; prevents inrush current and output overshoot during power-up. |
| Enable shutdown with 1-µA IQ | Reduces system standby power significantly-critical for battery-backed or energy-conscious applications. |
Applications
| Computer Peripherals | Battery-Powered Test Equipment |
|---|---|
|
Use Scenario: Generating isolated −5 V rail for RS-232 transceivers or analog front-end op-amps in USB-connected scanners or printers. IC Role / Device Role / Timing Role: Inverting DC/DC converter providing regulated negative supply referenced to system ground. Use Value: Eliminates need for separate negative supply transformer or charge pump; achieves 78% efficiency at 100 mA to extend battery life. |
Use Scenario: Powering dual-supply op-amps and ADC reference buffers in handheld multimeters or portable oscilloscopes. IC Role / Device Role / Timing Role: Negative voltage generator enabling rail-to-rail analog signal conditioning from single-cell or two-cell battery inputs. Use Value: Delivers stable −5 V at up to 200 mA with <0.2% load regulation, supporting precision measurement accuracy under variable load. |
| Industrial Sensor Interfaces | Legacy System Voltage Translation |
|
Use Scenario: Supplying −5 V bias to piezoelectric sensors or bridge-based strain gauges in factory-floor monitoring nodes. IC Role / Device Role / Timing Role: Compact, thermally robust negative rail source operating continuously across −40°C to 85°C ambient. Use Value: PDIP package offers mechanical reliability and ease of hand-soldering in low-volume industrial assembly; 0.4-Ω MOSFET ensures low self-heating at full load. |
Use Scenario: Retrofitting −5 V supply into legacy ISA-bus or parallel-port expansion cards replacing obsolete discrete solutions. IC Role / Device Role / Timing Role: Pin-compatible upgrade path for MAX735-based designs requiring identical footprint and function. Use Value: Direct replacement with identical 8-pin DIP layout, same EN/REF/SS/COMP/FB/GND/OUT/VCC pin mapping, and matching electrical behavior. |
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 capability, but uses external N-channel MOSFET and requires higher gate-drive overhead. | Lacks integrated power switch and 1.22-V reference; needs additional components for equivalent functionality. | Select when legacy MAX735 footprint reuse is mandatory and external FET layout is acceptable. |
| TPS6735ID | Identical electrical specs and pinout, but in SOIC-8 package (surface-mount); same −5 V output, 160-kHz PWM, and EN/REF/SS features. | Suitable for automated SMT production; smaller footprint but lower thermal dissipation than PDIP. | Prefer for new designs targeting volume manufacturing and space-constrained PCBs. |
Compared with TPS6735IPE4, MAX735CPA+ requires external switching elements and lacks an integrated reference, increasing BOM count and layout complexity, while TPS6735ID offers identical performance in a surface-mount package-ideal for modern assembly but with reduced thermal headroom in high-ambient environments.
Availability
TPS6735IPE4 is available at Aetrix Electronics and suitable for computer peripherals, battery-powered instrumentation, and industrial sensor interfaces requiring stable component supply and long-term manufacturability.
Supply support for TPS6735IPE4 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 TPS6735 product line delivers compact, efficient inverting DC/DC solutions for applications needing clean, regulated negative rails from positive inputs-targeting space-constrained, low-power, and thermally demanding embedded systems.
FAQ
What is the maximum continuous output current of the TPS6735IPE4?
The TPS6735IPE4 delivers up to 200 mA continuously across its full input range (4.5–6.2 V) and temperature range (−40°C to 85°C). Peak switch current is rated at 2 A, and the device maintains regulation within −4.75 V to −5.25 V under these conditions. Derating may apply at elevated ambient temperatures depending on PCB copper area and airflow.
Does the TPS6735IPE4 require external components to operate?
Yes-the TPS6735IPE4 requires five external components for basic operation: an inductor (10 µH), input capacitor (47 µF), output capacitor (100 µF), Schottky rectifier (e.g., 1N5817), and reference filter capacitor (10 µF). Additional components like soft-start (SS) and compensation (COMP) capacitors are needed for full specification compliance and stability.
Is the TPS6735IPE4 pin-compatible with the MAX735?
Yes-the TPS6735IPE4 is explicitly documented as pin-for-pin compatible with the MAX735 in 8-pin PDIP packages. Both share identical pin assignments (EN, REF, SS, COMP, FB, GND, OUT, VCC), enabling direct replacement in existing MAX735 layouts without PCB modification.
What is the purpose of the REF pin on the TPS6735IPE4?
The REF pin on the TPS6735IPE4 provides a buffered 1.22-V reference voltage capable of sourcing up to 125 µA. It serves dual purposes: stabilizing the internal error amplifier and supplying precision bias to external circuitry such as ADC references or op-amp level-shifting networks-eliminating the need for a separate voltage reference IC.
How does the EN pin affect the TPS6735IPE4's power consumption?
When EN is pulled low (≤0.4 V), the TPS6735IPE4 enters shutdown mode, disabling the power switch, reference, oscillator, and error amplifier. This reduces total supply current to ≤1 µA-critical for battery-operated systems where standby power must be minimized. EN high (>2 V) restores full operation with 1.9-mA no-load current.
TPS6735IPE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- 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
TPS6735IPE4 FAQ
1.How can I place an order for TPS6735IPE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6735IPE4 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 TPS6735IPE4 reliable?
The price and inventory of TPS6735IPE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6735IPE4 is usually 5 days.
3.What payment methods are accepted for TPS6735IPE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6735IPE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6735IPE4?
TPS6735IPE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6735IPE4 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 TPS6735IPE4?
For technical support, including TPS6735IPE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6735IPE4 requirements.
6.How does Aetrix verify that TPS6735IPE4 is sourced from the original manufacturer or authorized distributors?
All TPS6735IPE4 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 TPS6735IPE4 meets industry standards.
7.What is the process for return or replacement of TPS6735IPE4?
All TPS6735IPE4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6735IPE4, 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 TPS6735IPE4 part is unused and in its original packaging.
Return procedure for TPS6735IPE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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