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Texas Instruments TPS6734IP
- Part No.:
- TPS6734IP
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TPS6734IP.pdf
- Description:
- IC REG BOOST 12.12V 150MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,220
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Product details
Overview
TPS6734IP from Texas Instruments is a fixed-output 12-V, 120-mA boost converter IC with 170-kHz current-mode PWM control, integrated 0.7-Ω n-channel MOSFET power switch, and enable input for shutdown. It operates from 2.7 V to 12 V input, delivers ≥120 mA from ≥3.75 V input, achieves 86% typical efficiency at 5 V/120 mA, and draws only 3 µA in shutdown-designed for flash memory programming supplies in battery-powered PCMCIA cards.
For engineers reviewing the TPS6734IP datasheet, TPS6734IP pinout, TPS6734IP application, or TPS6734IP equivalent, key selection criteria include its 12-V fixed output, 120-mA load capability at low input voltages, soft-start capacitor programmability, REF pin's 1.22-V/100-µA reference output, and compatibility with discrete external components (inductor, Schottky diode, two capacitors, compensation cap).
Technical Context
The TPS6734IP implements a current-mode PWM architecture with a 170-kHz oscillator, slope-compensated current sensing, and an internal 1.22-V reference routed to the REF pin. Its gate drive is bootstrapped from the 12-V output post-startup to optimize efficiency below 5 V input.
It features cycle-by-cycle overcurrent protection (1.5-A peak limit), soft-start clamping via the SS pin, and error-amplifier-based voltage regulation using external FB-to-OUT feedback. Shutdown is controlled by EN (2-V high threshold, 0.4-V low threshold), reducing supply current to 3 µA while discharging the soft-start capacitor through a 1-MΩ internal resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±3.5% (11.64–12.6 V) across 0–120 mA load and 4.75–12 V input. |
| Max Output Current | 120 mA minimum from ≥3.75 V input; up to 150 mA at 3.0 V per Figure 11. |
| Input Voltage Range | 2.7 V to 12 V-supports single-cell Li-ion, 3.3-V logic rails, and legacy 5-V systems. |
| Switching Frequency | 170 kHz fixed-enables compact magnetics and predictable EMI filtering. |
| Shutdown Current | 3 µA maximum-preserves battery life during idle periods in portable equipment. |
| Reference Output | 1.22 V ±1%, 100 µA sink/source capability on REF pin for external bias or monitoring. |
| Power Switch RDS(on) | 0.7 Ω typ.-minimizes conduction loss in the integrated n-channel MOSFET drain (OUT pin). |
Pinout & Package
TPS6734IP is supplied in an 8-pin plastic DIP (PDIP) package per JEDEC MS-001, with 0.300-inch wide body, 0.100-inch lead pitch, and through-hole mounting. Thermal dissipation rating is 1175 mW at 25°C, derating linearly to 611 mW at 85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Logic-high (≥2 V) enables operation; logic-low (≤0.4 V) forces 3-µA shutdown and discharges SS capacitor. |
| REF (Pin 2) | Reference voltage output | Provides stable 1.22-V source/sink up to 100 µA for external circuitry or calibration. |
| SS (Pin 3) | Soft-start timing node | Capacitor from SS to GND controls output ramp rate; no cap yields fastest startup. |
| COMP (Pin 4) | Loop compensation node | 0.001-µF cap between COMP and FB stabilizes feedback loop; sets phase margin and transient response. |
| GND (Pin 5) | Power and signal ground | Common return for all internal circuits; requires low-impedance PCB ground plane. |
| OUT (Pin 6) | Power switch drain | Connects to Schottky diode anode; carries switched inductor current and supports 1.5-A peak fault current. |
| FB (Pin 7) | Voltage feedback input | Connected directly to output via resistive divider; regulates 12-V output via internal error amplifier. |
| VCC (Pin 8) | Main supply input | Accepts 2.7–12 V; powers internal circuitry before bootstrap drive engages from OUT. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-for-pin compatibility with MAX734 | Enables drop-in replacement in existing designs without layout changes or firmware updates. |
| Only 5 external components required | Reduces BOM count and PCB area (<0.7 in² with SMT parts); eliminates need for external driver or controller IC. |
| Bootstrapped gate drive | Derives high-side drive from 12-V output after startup-improves efficiency at input voltages <5 V. |
| Integrated 1.22-V reference on REF pin | Eliminates need for external reference IC in systems requiring precision bias or ADC reference scaling. |
| Discontinuous/continuous mode auto-transition | Maintains regulation across full load range (0–120 mA) without manual mode selection or control overhead. |
Applications
| Flash Memory Programming | PCMCIA Card Power |
|---|---|
|
Use Scenario: Erase/program cycles in NOR/NAND flash devices require regulated 12-V pulses with fast enable/disable control. IC Role / Device Role / Timing Role: TPS6734IP acts as dedicated high-efficiency 12-V charge pump supply, enabled only during erase operations via microcontroller GPIO. Use Value: 3-µA shutdown current extends battery life between programming events; soft-start prevents inrush into large flash array capacitance. |
Use Scenario: PCMCIA Type II cards in portable laptops need isolated 12-V rail for legacy I/O or SRAM backup. IC Role / Device Role / Timing Role: TPS6734IP generates 12 V from the host's 3.3-V or 5-V bus, with EN synchronized to card insertion detection logic. Use Value: Wide 2.7–12 V input range accommodates variable host supply; DIP package simplifies prototyping and repair on card-edge PCBs. |
| Battery-Powered Op-Amp Bias | Low-Power Sensor Signal Chain |
|
Use Scenario: Rail-to-rail op-amps in handheld test equipment require clean ±12-V dual supplies derived from single Li-ion cell. IC Role / Device Role / Timing Role: TPS6734IP provides positive 12-V rail; paired with inverting buck-boost for negative rail-both controlled by shared EN. Use Value: 86% efficiency at 5-V input minimizes heat in sealed enclosures; REF pin supplies precision bias to op-amp input stages. |
Use Scenario: Industrial sensor nodes with analog front-ends (e.g., strain gauges, RTDs) need stable 12-V excitation for bridge circuits. IC Role / Device Role / Timing Role: TPS6734IP delivers low-noise 12-V excitation; SS capacitor sets ramp time to avoid sensor thermal shock during wake-up. Use Value: 1.22-V REF pin enables ratiometric ADC reference scaling; low 3-µA shutdown current meets multi-year battery life targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost-converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX734CPA+ | Pin-compatible but higher 100-µA shutdown current; 12-V output tolerance ±5%; no REF pin. | Lacks 1.22-V reference output and soft-start control-unsuitable where external bias or inrush limiting is required. | Choose MAX734CPA+ only if legacy footprint reuse is critical and REF/SS functions are unused. |
| TPS61040DGQR | Adjustable output (1.8–28 V), 28-V switch, 500-kHz switching, 0.5-A max output-but requires external feedback resistors and compensation. | Supports wider output range and higher current, but increases BOM count and design complexity vs. TPS6734IP's fixed 12-V simplicity. | Choose TPS61040DGQR when output voltage flexibility or >120 mA load is needed; not a pin-compatible substitute. |
Compared with MAX734CPA+, TPS6734IP offers lower shutdown current, tighter output regulation, and added REF/SS functionality; compared with TPS61040DGQR, it trades adjustability and current headroom for minimal external parts and guaranteed 12-V compliance.
Availability
TPS6734IP is available at Aetrix Electronics and suitable for flash memory programming, PCMCIA card power, battery-powered op-amp bias, low-power sensor signal chains, and industrial embedded systems requiring stable component supply and long-lifecycle support.
Supply support for TPS6734IP 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade performance.
The TPS6734IP belongs to TI's legacy power management portfolio designed specifically for low-noise, fixed-output DC-DC boost conversion in space-constrained, battery-sensitive applications such as memory programming and portable peripherals.
FAQ
What is the maximum output current capability of the TPS6734IP at 3.75-V input?
The TPS6734IP delivers a minimum of 120 mA at input voltages ≥3.75 V, as specified in the datasheet's "Performance Characteristics" table. At 3.0 V input, it sustains up to 150 mA under typical conditions (Figure 11), though efficiency and regulation degrade below 3.75 V. The device enters current-limit protection above 1.5-A peak switch current.
Can the TPS6734IP generate output voltages other than 12 V?
No-the TPS6734IP is a fixed-output converter with internal feedback network set for 12 V. Unlike adjustable boost ICs, it has no external resistor divider pins; the FB pin connects directly to the output for regulation. For variable outputs, consider TI's TPS61040 or similar adjustable alternatives.
How does the REF pin on the TPS6734IP function, and what load can it drive?
The REF pin on the TPS6734IP provides a buffered 1.22-V reference with ±1% accuracy and supports up to 100 µA of sink or source current. It is intended for external biasing, ADC reference scaling, or comparator thresholds-not for powering regulators or op-amps with significant current demand.
What external components are mandatory for basic TPS6734IP operation?
Five external components are mandatory: an inductor (18 µH typical), Schottky rectifier (≥1 A, ≥20 V), output filter capacitor (33 µF tantalum), input filter capacitor (≥10 µF ceramic), and compensation capacitor (0.001 µF between COMP and FB). Optional components include SS capacitor and REF decoupling cap.
Is the TPS6734IP RoHS-compliant and suitable for modern reflow assembly?
Yes-the TPS6734IP is RoHS-compliant (lead-free NIPDAU finish) and rated MSL Level-1 with unlimited floor life. Its PDIP package has no moisture sensitivity restrictions, making it compatible with standard reflow and wave-solder processes without baking requirements.
TPS6734IP 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
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 12.12V
- Voltage - Output (Max):
- -
- Current - Output:
- 150mA
- Frequency - Switching:
- 170kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TPS6734IP FAQ
1.How can I place an order for TPS6734IP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6734IP 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 TPS6734IP reliable?
The price and inventory of TPS6734IP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6734IP is usually 5 days.
3.What payment methods are accepted for TPS6734IP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6734IP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6734IP?
TPS6734IP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6734IP 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 TPS6734IP?
For technical support, including TPS6734IP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6734IP requirements.
6.How does Aetrix verify that TPS6734IP is sourced from the original manufacturer or authorized distributors?
All TPS6734IP 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 TPS6734IP meets industry standards.
7.What is the process for return or replacement of TPS6734IP?
All TPS6734IP units undergo pre-shipment inspection (PSI). If there is an issue with TPS6734IP, 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 TPS6734IP part is unused and in its original packaging.
Return procedure for TPS6734IP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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