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Texas Instruments LM2765M6/NOPB
- Part No.:
- LM2765M6/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
LM2765M6/NOPB.pdf
- Description:
- IC REG CHARGE PUMP 2VIN SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,471
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Product details
Overview
LM2765M6/NOPB from Texas Instruments is a CMOS switched-capacitor voltage doubler IC operating from 1.8 V to 5.5 V input, delivering up to 20 mA output current with 90% typical conversion efficiency at 20 mA load, 20-Ω typical output impedance, and 50-kHz switching frequency. It serves as a compact, inductorless power supply solution for portable analog circuitry requiring doubled rail voltage.
For engineers reviewing the LM2765M6/NOPB datasheet, LM2765M6/NOPB pinout, LM2765M6/NOPB application, or LM2765M6/NOPB equivalent, key selection criteria include input voltage range compatibility (1.8–5.5 V), shutdown current (0.1 µA), SOT-23-6 package constraints, and external capacitor dependency for output regulation and ripple control.
Technical Context
The LM2765M6/NOPB implements a four-switch charge-pump topology that alternately charges and transfers energy between two external capacitors to generate a 2×VIN output. Its internal oscillator operates at 50 kHz (typical), enabling low-output-impedance performance without magnetic components.
It features a dedicated shutdown (SD) pin that reduces quiescent current to 0.1 µA when pulled high (>40% of V+), and integrates MOSFET switches with ~8 Ω total RDS(on). Output voltage accuracy and ripple are directly dependent on external capacitor ESR and capacitance values.
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 | 20 mA (max) - sufficient for biasing op-amps, interface ICs, or small analog subsystems. |
| Conversion Efficiency | 90% (typ. at 20 mA) - minimizes battery drain in portable systems with moderate load demands. |
| Output Impedance | 20 Ω (typ.) - determines load-induced voltage drop (ΔV = ILOAD × 20 Ω); sensitive to capacitor ESR. |
| Shutdown Current | 0.1 µA (typ.) - enables ultra-low-power sleep modes in battery-backed instrumentation. |
| Switching Frequency | 50 kHz (typ.) - balances capacitor size, EMI, and output ripple; allows use of low-cost 3.3 µF ceramic caps. |
| Ambient Temp Range | –40°C to +85°C - qualified for industrial and consumer handheld environments. |
Pinout & Package
LM2765M6/NOPB is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with 1.45 mm max height, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Power Input | Main positive supply input (1.8–5.5 V); must be bypassed with local ceramic capacitor. |
| 2 - GND | Ground Reference | System ground return path for all internal switches and external capacitors. |
| 3 - CAP− | Flying Capacitor Terminal | Negative node of external flying capacitor (C1); connects to internal switch array during charge phase. |
| 4 - SD | Digital Control Input | Active-high shutdown enable; tie to GND for normal operation; >0.4×V+ triggers shutdown mode. |
| 5 - OUT | Power Output | Doubled output voltage (≈2×V+); requires external output capacitor (C2) for filtering and stability. |
| 6 - CAP+ | Flying Capacitor Terminal | Positive node of external flying capacitor (C1); alternately charged and stacked with V+ to generate output. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage doubling architecture | Eliminates need for inductors-reduces BOM count, board area, and EMI vs. inductive DC-DC converters. |
| Low quiescent current | 130 µA operating current enables >100-hour runtime on coin cells when driving light loads. |
| Integrated MOSFET switches | Four internal CMOS switches with ~8 Ω combined RDS(on) minimize conduction loss and simplify external design. |
| Shutdown control | Dedicated SD pin reduces supply current to 0.1 µA-critical for always-on sensor nodes and standby power budgets. |
| Capacitor-based regulation | Output voltage set by charge transfer ratio (2×) and stabilized via external C1/C2; no feedback loop required. |
Applications
| Operational Amplifier Power Supply | Interface Power Supply |
|---|---|
|
Use Scenario: Generating ±5 V rails from a single 5 V supply for rail-to-rail op-amps in portable test equipment. IC Role / Device Role / Timing Role: Voltage-doubling charge pump providing clean, low-noise positive boost rail for analog signal conditioning stages. Use Value: Enables dual-supply op-amp operation without transformer or inductor, reducing footprint by >40% versus discrete DC-DC solutions. |
Use Scenario: Powering RS-232 transceivers or level shifters requiring higher voltage than main system rail (e.g., 3.3 V MCU driving 5 V interface). IC Role / Device Role / Timing Role: Fixed-ratio voltage booster supplying regulated 6.6 V output from 3.3 V input for interface IC biasing. Use Value: Delivers stable 2× output with <100 mV droop at 15 mA, meeting TIA-232 driver voltage requirements without layout-sensitive magnetics. |
| Handheld Instrument Power | Cellular Phone Peripheral Supply |
|
Use Scenario: Providing auxiliary 5 V rail for LCD bias or backlight drivers in handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Low-quiescent-current voltage doubler supporting intermittent high-current bursts while maintaining >1-year battery life on AA cells. Use Value: Achieves 92% efficiency at 10 mA load, minimizing thermal rise in sealed enclosures and extending alkaline battery service life. |
Use Scenario: Supplying 3.6 V to 4.2 V camera modules or RF front-end ICs in legacy GSM handsets using 2.7–4.2 V battery input. IC Role / Device Role / Timing Role: Compact SOT-23-6 voltage booster enabling direct integration near camera sensor without PCB real estate penalty. Use Value: Delivers 20 mA at <2% line regulation across full battery discharge curve, ensuring consistent image sensor performance. |
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 capability; requires different capacitor values (1 µF). | Better suited for higher-current analog supplies but consumes more quiescent current (150 µA vs. 130 µA). | Select MAX680ESA+ when >20 mA output or faster transient response is required; verify capacitor ESR limits. |
| TPS60205DGSR | Fixed 5 V output (not adjustable); 60 mA output; integrated soft-start; 1.2 MHz switching frequency. | Designed for fixed-output USB-peripheral power; lacks shutdown pin and wide input flexibility. | Choose TPS60205DGSR only for 5 V–only systems needing higher current and lower ripple; not a functional substitute for variable-input doubling. |
Compared with LM2765M6/NOPB, MAX680ESA+ offers higher output current and frequency but trades off shutdown control and input voltage flexibility, while TPS60205DGSR delivers superior ripple performance at fixed 5 V but cannot operate below 2.7 V or support custom output scaling.
Availability
LM2765M6/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, handheld communications devices, and analog interface power supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LM2765M6/NOPB 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 specializing in analog, embedded processing, and power management technologies, with over 90 years of innovation in high-reliability electronic components.
The LM2765M6/NOPB belongs to TI's switched-capacitor voltage converter product line, designed specifically for compact, inductorless DC-DC voltage boosting in battery-powered portable electronics where size, efficiency, and simplicity are critical.
FAQ
What is the minimum input voltage required for reliable startup of the LM2765M6/NOPB?
The LM2765M6/NOPB requires a minimum input voltage of 1.8 V to initiate oscillation and sustain regulation. Startup is assisted by an external Schottky diode (e.g., 1N5817) that pre-charges the OUT pin to exceed the 1.8 V oscillator threshold before internal switching begins. Below 1.8 V, the device will not generate output voltage.
Can the LM2765M6/NOPB be used to generate negative voltage?
No, the LM2765M6/NOPB is configured exclusively as a positive voltage doubler and does not support inverting topologies. Its internal switch array and pinout (CAP+, CAP−, OUT, V+, GND, SD) are hardwired for 2×VIN generation. For negative output, TI recommends the LM2766 or MAX680, which implement inverting charge-pump architectures.
What capacitor values and types are recommended for optimal performance with the LM2765M6/NOPB?
Texas Instruments specifies 3.3 µF ceramic capacitors (X5R or X7R dielectric) with ≤0.3 Ω ESR for both flying (C1) and output (C2) capacitors. Lower ESR reduces output resistance and ripple; higher capacitance improves load transient response. Tantalum or aluminum electrolytics are not recommended due to ESR and reliability limitations.
Does the LM2765M6/NOPB require an external diode, and if so, why?
Yes, a Schottky diode (e.g., 1N5817 or MBR0520LT1) is required between V+ and OUT for startup only. It ensures the OUT pin reaches >1.8 V before the internal oscillator activates, preventing latch-up via parasitic substrate diodes. Once running, the diode is reverse-biased and carries no steady-state current.
How does temperature affect the output voltage accuracy of the LM2765M6/NOPB?
Output voltage accuracy remains stable across –40°C to +85°C ambient, with typical deviation <±1.5% due to minimal temperature coefficient in the charge-transfer ratio. However, output resistance increases ~15% from 25°C to 85°C (per Figure 4), causing greater load-induced droop at elevated temperatures-designers should derate maximum load current accordingly.
LM2765M6/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Ratiometric
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 50kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
LM2765M6/NOPB FAQ
1.How can I place an order for LM2765M6/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2765M6/NOPB 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 LM2765M6/NOPB reliable?
The price and inventory of LM2765M6/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2765M6/NOPB is usually 5 days.
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LM2765M6/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2765M6/NOPB 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 LM2765M6/NOPB?
For technical support, including LM2765M6/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2765M6/NOPB requirements.
6.How does Aetrix verify that LM2765M6/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2765M6/NOPB 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 LM2765M6/NOPB meets industry standards.
7.What is the process for return or replacement of LM2765M6/NOPB?
All LM2765M6/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2765M6/NOPB, 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 LM2765M6/NOPB part is unused and in its original packaging.
Return procedure for LM2765M6/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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