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Texas Instruments TPS6734IDG4
- Part No.:
- TPS6734IDG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS6734IDG4.pdf
- Description:
- IC REG BOOST 12.12V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,291
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Product details
Overview
TPS6734IDG4 from Texas Instruments is a fixed-output 12-V, 120-mA boost converter IC with integrated 0.7-Ω n-channel MOSFET power switch, 170-kHz current-mode PWM control, and enable input for shutdown. It operates from 2.7 V to 12 V input, delivers ≥120 mA at ≥3.75 V input, and draws only 3 µA in shutdown-designed specifically for flash memory programming supplies in battery-powered PCMCIA cards and portable instrumentation.
For engineers reviewing the TPS6734IDG4 datasheet, TPS6734IDG4 pinout, TPS6734IDG4 application, or TPS6734IDG4 equivalent, key selection criteria include its 12-V fixed output regulation accuracy (±3.3% over load/line), soft-start capacitor programmability, REF pin's 1.22-V/100-µA reference capability, and compatibility with minimal external components (inductor, Schottky diode, two capacitors, compensation cap).
Technical Context
The TPS6734IDG4 implements a current-mode PWM architecture with a 170-kHz oscillator and slope-compensated current sensing, enabling stable operation across discontinuous and continuous conduction modes. Its gate drive is bootstrapped from the 12-V output post-startup to optimize efficiency below 5 V input.
It integrates an error amplifier with externally accessible COMP and FB pins, a 1.22-V precision reference on REF (±6.7 ppm/°C drift), and a dedicated EN pin with 2-V high-threshold and 0.4-V low-threshold logic control-supporting precise system-level power sequencing and low-quiescent-current shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 12 V ±3.3% (11.64–12.6 V) across 0–120 mA load and 4.75–12 V input-enables direct replacement of discrete 12-V charge pumps in flash erase circuits. |
| Input voltage range | 2.7 V to 12 V-supports single-cell Li-ion (3.0–4.2 V), 3.3-V logic rails, and 5-V USB-powered systems without intermediate regulation. |
| Max output current | 120 mA minimum at ≥3.75 V input; up to 150 mA at 3.0 V-sufficient for standard NOR/NAND flash programming pulses (typically 10–100 ms, 10–50 mA). |
| Shutdown supply current | 3 µA maximum-reduces standby power in always-on embedded controllers managing flash memory partitions. |
| Oscillator frequency | 170 kHz typical-determines minimum inductor size (18 µH typical) and enables compact PCB layout with <0.7 in² footprint using surface-mount passives. |
| Reference voltage | 1.22 V ±1% at 25°C, 6.7 ppm/°C drift-provides stable external bias for op-amps or ADC references in same-battery-domain signal chains. |
| Power switch RDS(on) | 0.7 Ω typ.-limits conduction loss to ≤84 mW at 120 mA, supporting >85% peak efficiency at 5-V input/120-mA load. |
Pinout & Package
TPS6734IDG4 is packaged in an 8-pin SOIC (D package), JEDEC MS-012 compliant, with 1.27-mm lead pitch and RoHS-compliant NiPdAu (NIPDAU) finish. Thermal resistance θJA = 172°C/W (SOIC); max power dissipation at 25°C = 725 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Logic-high ≥2 V activates converter; logic-low ≤0.4 V forces 3-µA shutdown-enables microcontroller-driven flash erase scheduling without external FET. |
| REF (Pin 2) | 1.22-V reference output | Sources up to 100 µA; requires 0.01–0.1 µF decoupling-used for precision biasing of external analog circuitry sharing same battery rail. |
| SS (Pin 3) | Soft-start timing node | Capacitor to GND controls output ramp rate (e.g., 0.1 µF → ~37 ms rise); prevents inrush into flash VPP pins during power-up. |
| COMP (Pin 4) | Loop compensation node | 0.001 µF capacitor to FB stabilizes feedback loop-critical for maintaining stability with varying ESR output capacitors (e.g., tantalum vs. ceramic). |
| GND (Pin 5) | Power and signal ground | Common return for all internal blocks; must connect to low-impedance ground plane-minimizes noise coupling into REF and FB paths. |
| OUT (Pin 6) | MOSFET drain output | Switching node connected to external Schottky diode anode-requires short, low-inductance trace to diode and output capacitor to suppress ringing. |
| FB (Pin 7) | Voltage feedback input | Connected directly to 12-V output via resistive divider (not required for fixed version)-in TPS6734IDG4, internally tied for 12-V regulation; unused externally. |
| VCC (Pin 8) | Input supply connection | Accepts 2.7–12 V; requires local 0.1 µF ceramic bypass-powers internal logic and bootstrap circuitry; not used as output driver source in startup phase. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-for-pin compatibility with MAX734 | Enables drop-in upgrade path with lower quiescent current (3 µA vs. MAX734's 10 µA), wider input range (2.7 V vs. 3.0 V min), and higher output current capability. |
| Integrated 0.7-Ω n-channel MOSFET | Eliminates need for external high-side switch; reduces BOM count and PCB area while maintaining >85% efficiency at 5-V input/120-mA load. |
| Bootstrapped gate drive | Derives high-side drive from regulated 12-V output after startup-improves switching efficiency at low input voltages (<5 V) without requiring external charge pump. |
| Externally programmable soft start | SS pin accepts 0.047–1.0 µF capacitor to tailor output voltage rise time (22–400 ms typical), preventing flash memory latch-up during VPP application. |
| 1.22-V precision reference output | Stable, low-drift (6.7 ppm/°C) reference usable for external analog functions-avoids need for separate voltage reference IC in space-constrained portable designs. |
Applications
| Flash Memory Programming Supply | PCMCIA Card Power Management |
|---|---|
Use Scenario: Generating 12-V VPP for erasing NOR flash memory arrays in portable data loggers and industrial controllers. IC Role / Device Role / Timing Role: Fixed-output boost converter providing regulated 12-V programming voltage under microcontroller command via EN pin. Use Value: Delivers 120 mA peak current with <3.3% output tolerance and 3-µA shutdown-ensures reliable flash erase cycles while minimizing battery drain between operations. | Use Scenario: Supplying 12-V auxiliary power to PCMCIA Type II card slots in handheld test equipment and field-deployable analyzers. IC Role / Device Role / Timing Role: Standby-enabled boost regulator activated only during card insertion and configuration, synchronized to host controller GPIO. Use Value: Achieves <0.7 in² total solution size with only five external components-meets strict PCMCIA mechanical envelope and thermal constraints. |
| Battery-Powered Instrumentation | Portable Op-Amp Bias Supply |
Use Scenario: Providing isolated 12-V rail for sensor front-end amplifiers and ADC drivers in handheld multimeters and oscilloscopes. IC Role / Device Role / Timing Role: High-efficiency boost converter operating from single 3.7-V Li-ion cell, with REF pin supplying precision bias to analog signal chain. Use Value: Maintains >82% efficiency at 10–50 mA loads and supports soft-start to prevent measurement offset transients during power-on calibration. | Use Scenario: Generating dual-rail ±12-V supplies (using companion inverting topology) for rail-to-rail op-amps in portable audio interfaces and medical sensors. IC Role / Device Role / Timing Role: Primary 12-V boost stage feeding inverting charge pump; REF pin provides stable 1.22-V reference for gain-setting resistors. Use Value: Enables <1% gain error over temperature using REF's 6.7 ppm/°C drift-critical for precision analog signal conditioning without trimming. |
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 10-µA shutdown current, narrower 3.0–12 V input range, and no REF output pin. | Lacks 1.22-V reference; unsuitable where external analog bias is needed without added IC. | Select MAX734CPA+ only if legacy board reuse is mandatory and REF functionality is unused. |
| TPS61040DGQR | Adjustable output (1.8–28 V), 28-V switch, 500-kHz switching, but requires external feedback resistors and lacks REF pin. | Supports variable outputs but adds BOM complexity; no integrated reference for analog subsystems. | Choose TPS61040DGQR when output voltage flexibility or higher voltage capability (>12 V) is required. |
Compared with MAX734CPA+, TPS6734IDG4 offers lower shutdown current and integrated reference; versus TPS61040DGQR, it trades adjustability for simplicity and analog integration-making it optimal for fixed 12-V flash programming where minimal external parts and precision bias are critical.
Availability
TPS6734IDG4 is available at Aetrix Electronics and suitable for flash memory programming, PCMCIA card power management, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS6734IDG4 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 power conversion ICs.
The TPS6734 product line was designed specifically for low-power, fixed-output boost applications in portable and memory-intensive systems-emphasizing minimal external components, ultra-low shutdown current, and integrated reference functionality.
FAQ
What is the output voltage tolerance of the TPS6734IDG4 over full load and line conditions?
The TPS6734IDG4 delivers a fixed 12-V output with guaranteed tolerance of ±3.3% (11.64 V to 12.6 V) across 0–120 mA load and 4.75–12 V input voltage range, as verified in electrical characteristics tables. This tight regulation ensures reliable flash memory erase operation without external trimming. The TPS6734IDG4 achieves this using internal feedback and a precision 1.22-V reference with 6.7 ppm/°C drift.
Can the TPS6734IDG4 operate from a 3.0-V input and still deliver 120 mA?
Yes-the TPS6734IDG4 delivers ≥120 mA at input voltages ≥3.75 V, and up to 150 mA at 3.0 V per performance characteristics data. At 3.0 V, efficiency drops to ~72%, but the device remains functional for short-duration flash programming pulses. The TPS6734IDG4 uses bootstrapped gate drive to sustain MOSFET switching performance at low inputs, unlike non-bootstrapped alternatives.
Does the TPS6734IDG4 require external feedback resistors to set its 12-V output?
No-the TPS6734IDG4 is a fixed-output variant; its 12-V regulation is implemented internally, and the FB pin is pre-connected. External resistors are unnecessary. The TPS6734IDG4 differs from adjustable versions (e.g., TPS6735) by omitting resistor dependency, reducing BOM count and layout sensitivity-ideal for cost- and space-constrained flash programming circuits.
What is the purpose of the REF pin on the TPS6734IDG4, and how much current can it supply?
REF (Pin 2) provides a buffered 1.22-V precision reference with ±1% initial accuracy and 6.7 ppm/°C temperature drift, capable of sourcing up to 100 µA. It is intended for biasing external analog circuitry-such as op-amp gain networks or ADC references-within the same battery domain. The TPS6734IDG4 eliminates need for a separate reference IC, saving board space and cost in portable instrumentation.
How does the soft-start function work on the TPS6734IDG4, and what capacitor value is recommended for typical flash programming use?
The TPS6734IDG4 uses an external capacitor on SS (Pin 3) to control output voltage ramp rate; a 0.1 µF capacitor yields ~37 ms rise time at 5-V input. For flash programming, where fast VPP application is acceptable, 0.047 µF (~22 ms) balances inrush limiting and speed. The TPS6734IDG4's soft-start prevents current surges that could trigger brownout in shared battery rails or damage flash VPP pins during power-up.
TPS6734IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS6734IDG4 FAQ
1.How can I place an order for TPS6734IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS6734IDG4 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 TPS6734IDG4 reliable?
The price and inventory of TPS6734IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS6734IDG4 is usually 5 days.
3.What payment methods are accepted for TPS6734IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS6734IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS6734IDG4?
TPS6734IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS6734IDG4 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 TPS6734IDG4?
For technical support, including TPS6734IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS6734IDG4 requirements.
6.How does Aetrix verify that TPS6734IDG4 is sourced from the original manufacturer or authorized distributors?
All TPS6734IDG4 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 TPS6734IDG4 meets industry standards.
7.What is the process for return or replacement of TPS6734IDG4?
All TPS6734IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS6734IDG4, 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 TPS6734IDG4 part is unused and in its original packaging.
Return procedure for TPS6734IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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