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Texas Instruments LM2767M5
- Part No.:
- LM2767M5
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2767M5.pdf
- Description:
- IC REG CHG PUMP ADJ 15MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:899
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Product details
Overview
LM2767M5 from Texas Instruments is a CMOS switched-capacitor voltage doubler IC operating from 1.8 V to 5.5 V input, delivering ≥15 mA output current with 96% typical conversion efficiency at 15 mA load and 20 Ω typical output impedance in a 5-pin SOT-23 (DBV) package. It serves as a compact, inductorless power supply for op-amp biasing and interface rails in portable instrumentation.
For engineers reviewing the LM2767M5 datasheet, LM2767M5 pinout, LM2767M5 application, or LM2767M5 equivalent, key selection criteria include its fixed 11-kHz switching frequency (to avoid audio-band interference), 40 µA quiescent current, 2.90 mm × 1.60 mm SOT-23 footprint, and absence of enable control - requiring external power cycling for disable.
Technical Context
The LM2767M5 implements a two-phase charge-pump topology using four internal CMOS switches driven by an on-chip 11-kHz oscillator. It doubles V+ by alternately charging and reconfiguring two external capacitors (C1 flying, C2 output) without magnetic components.
Its functional mode is always-on: no shutdown pin exists, so disabling requires removal of V+ supply. Output regulation is unregulated - VOUT ≈ 2×V+ minus drop across switch RDS(on), capacitor ESR, and load current - making it suitable only for non-critical voltage doubling where ripple and droop are managed externally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion, NiMH, and 3.3 V/5 V logic rails without level-shifting. |
| Output Current | 15 mA (min, at V+ ≥ 2.5 V) - sufficient for biasing dual op-amps or powering low-current analog interfaces. |
| Switching Frequency | 11 kHz (typical) - avoids audible noise and simplifies EMI filtering vs. MHz-range DC-DC converters. |
| Quiescent Current | 40 µA (typical, no load) - enables multi-day battery life in always-on handheld instruments. |
| Output Impedance | 20 Ω (typical, at 15 mA) - determines load-induced voltage droop: ΔV = ILOAD × 20 Ω. |
| Conversion Efficiency | 96% (typical, at 15 mA) - reduces thermal load and extends battery runtime versus linear regulators. |
| Absolute Max V+ | 5.8 V - defines safe overvoltage margin during transient events or hot-swap conditions. |
Pinout & Package
SOT-23 (DBV) package, 5-pin, body size 2.90 mm × 1.60 mm, max height 1.45 mm, RoHS-compliant with Sn lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Power output | Delivers doubled voltage (≈2×V+) to load; connects directly to output capacitor C2 and load ground return. |
| 2 - GND | Ground reference | Common return for V+, VOUT, CAP−, and CAP+; must be low-inductance connection to minimize switching noise. |
| 3 - CAP− | Flying capacitor negative terminal | Connects to negative side of external flying capacitor C1; critical path for charge transfer timing and ESR sensitivity. |
| 4 - V+ | Input power supply | Accepts 1.8–5.5 V input; powers internal oscillator and switches; no internal overvoltage protection beyond 5.8 V absolute max. |
| 5 - CAP+ | Flying capacitor positive terminal | Connects to positive side of external flying capacitor C1; forms charge-transfer loop with CAP− and internal switch array. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage doubling architecture | Fixed-ratio (2×) conversion without inductors - eliminates magnetic component cost, size, and EMI concerns. |
| Low quiescent current | 40 µA enables >1-year operation on coin-cell batteries in low-duty-cycle sensor nodes. |
| Audio-band switching frequency | 11-kHz operation avoids 20 Hz–20 kHz audible range - prevents piezo speaker coupling and user-perceivable noise. |
| External capacitor flexibility | Supports ceramic, tantalum, or aluminum electrolytic capacitors - allows trade-offs between size, cost, and ESR-driven output impedance. |
| Parallel operation capability | Multiple LM2767M5 units can be paralleled without synchronization - reduces effective output resistance linearly with count. |
Applications
| Operational Amplifier Bias Supply | Interface Power Rail |
|---|---|
|
Use Scenario: Providing ±5 V rails for rail-to-rail op-amps in battery-powered data loggers. IC Role / Device Role / Timing Role: Voltage-doubling charge pump generating positive high-side rail from 3.3 V system supply. Use Value: Eliminates need for bulky inductors and enables compact 2-layer PCB layout while maintaining 15 mA drive capability for dual op-amp stages. |
Use Scenario: Powering RS-232 transceivers or level-shifters requiring +10 V from 5 V microcontroller supply. IC Role / Device Role / Timing Role: Fixed-ratio voltage booster supplying regulated interface voltage via downstream LDO (e.g., LP2980-5.0). Use Value: Delivers stable 10 V output with <100 mV ripple at 10 mA load when paired with 10 µF low-ESR ceramic capacitors. |
| Handheld Instrument Power | Cellular Phone Peripheral Supply |
|
Use Scenario: Generating auxiliary 3.3 V or 5 V rails for LCD bias or sensor excitation in portable multimeters. IC Role / Device Role / Timing Role: Low-noise, always-on voltage converter feeding into post-regulation stage for precision analog circuitry. Use Value: Achieves 98% efficiency at 5 mA load, minimizing self-heating in sealed plastic enclosures with limited airflow. |
Use Scenario: Supplying camera module flash LED drivers or RF front-end bias in legacy GSM handsets. IC Role / Device Role / Timing Role: Compact, low-ESD-sensitivity (±2 kV HBM) voltage doubler supporting rapid on/off cycling during burst transmission. Use Value: Withstands 1-second output short-circuit events per spec, enabling robust operation during antenna detuning or ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-doubling applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Higher 125 kHz switching frequency; 100 mA output; requires different capacitor values and layout due to faster edge rates. | Better suited for higher-current, space-constrained designs where EMI filtering is feasible; not drop-in compatible due to pinout mismatch (8-pin SOIC vs. 5-pin SOT-23). | Select MAX680ESA+ only when >20 mA output or tighter regulation is required - verify capacitor ESR impact on ripple at 125 kHz. |
| TPS60403DBVR | 3.3 V fixed-output variant; 60 mA output; integrated soft-start; 550 kHz switching; requires different external components. | Designed for regulated 3.3 V generation from 1.6–5.5 V input - not a direct voltage-doubling replacement but offers tighter output tolerance (±1.5%) and lower noise. | Choose TPS60403DBVR when output voltage accuracy and low ripple outweigh size constraints - note 5-pin SOT-23 package matches LM2767M5 footprint but pin functions differ. |
Compared with MAX680ESA+ and TPS60403DBVR, the LM2767M5 provides the lowest BOM cost and smallest solution size for unregulated 2× voltage doubling up to 15 mA, with minimal layout complexity and no need for feedback compensation.
Availability
LM2767M5 is available at Aetrix Electronics and suitable for handheld instruments, cellular phone peripherals, and operational amplifier bias supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LM2767M5 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in energy-efficient electronics.
The LM2767 belongs to TI's switched-capacitor DC-DC converter product line, designed specifically for ultra-low-power, inductorless voltage multiplication in space-constrained portable electronics where EMI and board area are critical constraints.
FAQ
Does the LM2767M5 have an enable pin or shutdown function?
No, the LM2767M5 has no enable pin or hardware shutdown control. It operates continuously whenever V+ is applied within 1.8 V–5.5 V. To disable the device, the input supply must be physically removed or disconnected using an external switch or load switch. This design simplifies the IC but requires system-level power sequencing planning.
What is the recommended capacitor type and value for the LM2767M5?
Texas Instruments recommends 10 µF ceramic capacitors with ≤0.3 Ω ESR for both C1 (flying) and C2 (output). Low-ESR tantalum or aluminum electrolytic types (e.g., AVX TPS series or Nichicon PL series) are acceptable alternatives. Using higher-ESR capacitors increases output impedance and reduces efficiency - verified in Section 9.2.2.2 of the LM2767M5 datasheet.
Can multiple LM2767M5 devices be paralleled to increase output current?
Yes, multiple LM2767M5 units can be safely paralleled to reduce composite output resistance and increase total output current capacity. Each device requires its own flying capacitor C1, while a single shared output capacitor C2 suffices. The resulting output resistance is ROUT_total = ROUT_per_device / N, where N is the number of paralleled units - confirmed in Section 9.2.2.3 of the LM2767M5 datasheet.
Is the LM2767M5 suitable for automotive applications?
No, the LM2767M5 is rated for −40°C to +85°C ambient temperature and lacks AEC-Q200 qualification, automotive-grade screening, or extended temperature support. Its absolute maximum junction temperature (150°C) and thermal resistance (210°C/W) are insufficient for under-hood environments. Use only in commercial or industrial portable equipment per its specified operating conditions.
What is the purpose of the Schottky diode (D1) in the LM2767M5 typical application circuit?
The Schottky diode D1 (e.g., 1N5817) prevents latch-up by blocking conduction through the LM2767M5's internal parasitic diodes during startup and transient conditions. It also accelerates initial charging of the output capacitor C2, reducing start-up time. D1 must handle peak inrush current and exhibit low forward voltage (<0.3 V) - details are provided in Section 9.2.2.1 of the LM2767M5 datasheet.
LM2767M5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.6V
- Voltage - Output (Max):
- 11V
- Current - Output:
- 15mA
- Frequency - Switching:
- 11kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM2767M5 FAQ
1.How can I place an order for LM2767M5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2767M5 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 LM2767M5 reliable?
The price and inventory of LM2767M5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2767M5 is usually 5 days.
3.What payment methods are accepted for LM2767M5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2767M5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2767M5?
LM2767M5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2767M5 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 LM2767M5?
For technical support, including LM2767M5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2767M5 requirements.
6.How does Aetrix verify that LM2767M5 is sourced from the original manufacturer or authorized distributors?
All LM2767M5 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 LM2767M5 meets industry standards.
7.What is the process for return or replacement of LM2767M5?
All LM2767M5 units undergo pre-shipment inspection (PSI). If there is an issue with LM2767M5, 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 LM2767M5 part is unused and in its original packaging.
Return procedure for LM2767M5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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