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Texas Instruments TPS6735IPG4
- Part No.:
- TPS6735IPG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TPS6735IPG4.pdf
- Description:
- IC REG BUCK -5V 200MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,909
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Product details
Overview
TPS6735IPG4 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 drive), and enable-controlled shutdown (1 µA quiescent current). Designed for board-level negative rail generation in computer peripherals and battery-powered systems.
For engineers reviewing the TPS6735IPG4 datasheet, TPS6735IPG4 pinout, TPS6735IPG4 application, or TPS6735IPG4 equivalent, key selection criteria include its −5 V inverting topology, 160-kHz fixed switching frequency, soft-start capability via external capacitor, EN logic-level control, and compatibility with standard Schottky rectifiers and low-ESR tantalum output capacitors.
Technical Context
The TPS6735IPG4 implements a current-mode PWM architecture with a 160-kHz oscillator, slope-compensated current sensing, and an internal 1.22-V bandgap reference. Its error amplifier compares FB voltage against REF to regulate output, while the COMP pin enables loop compensation with an 82-pF capacitor for loads >100 mA.
It features undervoltage lockout (UVLO) at 3.7 V, overcurrent protection tripping at 2 A peak switch current, and soft-start controlled by an external SS capacitor charged through a 1.2-MΩ internal resistor. The EN input disables all internal circuitry except the UVLO comparator, reducing supply current to ≤1 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | −5 V nominal (−4.75 V to −5.25 V across 0–200 mA load and 4.5–6.2 V input) |
| Input Voltage Range | 4.5 V to 6.2 V - supports single-cell Li-ion or regulated 5-V rails |
| Max Output Current | 200 mA continuous - sufficient for analog front-ends, op-amp biasing, or RS-232 interface ICs |
| Switching Frequency | 160 kHz fixed - enables compact magnetics (10 µH inductor) and predictable EMI profile |
| Efficiency | 78% typical at 100 mA - minimizes thermal load in space-constrained applications |
| Quiescent Current | 1.9 mA no-load / 1 µA in shutdown - extends battery life during idle periods |
| Reference Output | 1.22 V ±1%, 125 µA max - usable as precision bias for external circuitry |
Pinout & Package
TPS6735IPG4 is supplied in an 8-pin plastic DIP (PDIP) package per JEDEC MS-001, with 0.300-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; leads are tin-lead (NIPDAU) finished and 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 discharges SS capacitor |
| REF (Pin 2) | 1.22-V reference output | Stable voltage source for external biasing; requires 10-µF decoupling to GND for noise immunity |
| SS (Pin 3) | Soft-start timing node | External capacitor 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 to stabilize feedback loop for loads >100 mA |
| FB (Pin 5) | Feedback input | Connected to output node to close regulation loop; senses −5 V via external resistive divider |
| GND (Pin 6) | Power and signal ground | Common return path for VCC, REF, SS, COMP, FB, and OUT; must be low-impedance |
| OUT (Pin 7) | Power MOSFET drain | Switching node connected to inductor and Schottky rectifier cathode; carries pulsed current up to 2 A peak |
| VCC (Pin 8) | Supply input | Accepts 4.5–6.2 V; requires local 1-µF ceramic + 47-µF bulk capacitance for stability |
Key Features
| Feature | Design Value |
|---|---|
| Inverting DC/DC topology | Generates regulated −5 V from positive input without requiring external inverting transformer or charge pump |
| Integrated 0.4-Ω p-channel MOSFET | Reduces external component count and PCB area; eliminates need for external high-side driver |
| 160-kHz current-mode PWM control | Provides inherent cycle-by-cycle current limiting and stable operation across line/load variations |
| Enable (EN) with 1-µA shutdown | Enables system-level power sequencing and ultra-low-power sleep modes in portable equipment |
| Soft-start via SS pin | Prevents inrush current and output overshoot using a single external capacitor (10 nF minimum) |
| 1.22-V reference output | Delivers precision bias for ADC references, sensor excitation, or comparator thresholds without extra ICs |
Applications
| Industrial Sensor Signal Conditioning | RS-232 Interface Power Supply |
|---|---|
Use Scenario: Providing dual-rail power to instrumentation amplifiers and analog-to-digital converters in factory-floor sensors. IC Role / Device Role / Timing Role: Generates isolated −5 V rail from a shared 5-V system bus to bias op-amp inputs and reference stages. Use Value: Enables true bipolar signal swing and improves SNR by eliminating ground-referenced offset errors in differential measurements. |
Use Scenario: Powering RS-232 transceivers (e.g., MAX232 derivatives) in embedded controllers with only a +5-V supply available. IC Role / Device Role / Timing Role: Inverts +5 V to −5 V required for RS-232 driver stage compliance with TIA/EIA-232-F voltage levels. Use Value: Eliminates need for external charge-pump ICs or transformers, reducing BOM cost and layout complexity. |
| Portable Medical Device Bias Rails | Test Equipment Auxiliary Negative Supply |
Use Scenario: Supplying negative bias to photodiode transimpedance amplifiers and low-noise analog front-ends in handheld diagnostics. IC Role / Device Role / Timing Role: Delivers clean, regulated −5 V with <90 mV ripple (at 200 mA) using low-ESR tantalum output capacitors. Use Value: Supports ultra-low input bias current (<1 pA) op-amps by minimizing voltage drift and noise coupling into sensitive nodes. |
Use Scenario: Generating auxiliary −5 V for calibration circuitry, DAC offset adjustment, or analog switch biasing in benchtop test instruments. IC Role / Device Role / Timing Role: Provides stable, enable-controllable negative rail synchronized with main system power-up sequence. Use Value: Ensures repeatable measurement accuracy by eliminating startup transients and enabling precise power sequencing. |
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 |
|---|---|---|---|
| MAX735CPD+ | Pin-for-pin compatible per datasheet; same −5 V/200 mA output but uses external N-channel MOSFET and requires bootstrap capacitor | Higher external component count; less integrated than TPS6735IPG4 due to discrete switch requirement | Choose when legacy MAXIM footprint reuse is critical and board area is not constrained |
| LM2662CMX/NOPB | Charge-pump inverter (no inductor); delivers −5 V at only 100 mA; 99% efficiency not achievable at full load | Limited to low-current, low-noise applications where magnetic components must be avoided | Choose only for ultra-low EMI environments or space-limited designs where inductors are prohibited |
Compared with MAX735CPD+ and LM2662CMX/NOPB, the TPS6735IPG4 offers superior integration (integrated p-channel MOSFET), higher output current capability (200 mA vs. 100 mA), and better efficiency under moderate load-making it optimal for industrial and medical applications demanding reliability and compactness.
Availability
TPS6735IPG4 is available at Aetrix Electronics and suitable for industrial sensor conditioning, RS-232 interface power, and portable medical device bias rails requiring stable component supply and long-term manufacturability.
Supply support for TPS6735IPG4 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 TPS6735IPG4 belongs to TI's legacy power management portfolio designed specifically for efficient, low-noise inverting DC/DC conversion in space-constrained and battery-sensitive applications.
FAQ
What is the maximum output current capability of the TPS6735IPG4?
The TPS6735IPG4 delivers up to 200 mA continuously at −5 V output across its full input range (4.5 V to 6.2 V) and operating temperature (−40°C to 85°C). Peak switch current is limited to 2 A, and performance is verified per Figure 10 in the SLVS141A datasheet. Derating applies above 70°C ambient per the dissipation rating table.
Does the TPS6735IPG4 require external compensation components?
Yes-the TPS6735IPG4 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 if output capacitance or ESR deviates significantly from the recommended 100-µF/100-mΩ specification.
Can the TPS6735IPG4 generate output voltages other than −5 V?
No-the TPS6735IPG4 is a fixed-output inverting converter optimized exclusively for −5 V regulation. Its internal feedback divider and reference architecture are trimmed for that specific output. To generate other negative voltages, use adjustable alternatives like the TPS6734 or external resistor networks with compatible controllers.
What is the purpose of the REF pin on the TPS6735IPG4?
The REF pin (Pin 2) provides a buffered 1.22-V precision reference voltage capable of sourcing up to 125 µA. It is intended for external biasing of analog circuitry such as ADC references, sensor excitation, or comparator thresholds-and requires a 10-µF capacitor to GND for noise suppression per the datasheet recommendation.
Is the TPS6735IPG4 pin-compatible with the MAX735 series?
Yes-the TPS6735IPG4 is explicitly documented as pin-for-pin compatible with the MAX735 family (e.g., MAX735CPD+) in the SLVS141A datasheet. This allows direct replacement in existing designs, though note differences in internal architecture: TPS6735IPG4 integrates the power MOSFET, while MAX735 requires an external switch and bootstrap capacitor.
TPS6735IPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
TPS6735IPG4 FAQ
1.How can I place an order for TPS6735IPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6735IPG4 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 TPS6735IPG4 reliable?
The price and inventory of TPS6735IPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6735IPG4 is usually 5 days.
3.What payment methods are accepted for TPS6735IPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6735IPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6735IPG4?
TPS6735IPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6735IPG4 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 TPS6735IPG4?
For technical support, including TPS6735IPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6735IPG4 requirements.
6.How does Aetrix verify that TPS6735IPG4 is sourced from the original manufacturer or authorized distributors?
All TPS6735IPG4 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 TPS6735IPG4 meets industry standards.
7.What is the process for return or replacement of TPS6735IPG4?
All TPS6735IPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6735IPG4, 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 TPS6735IPG4 part is unused and in its original packaging.
Return procedure for TPS6735IPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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