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Texas Instruments LM2765M6X/NOPB
- Part No.:
- LM2765M6X/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
LM2765M6X/NOPB.pdf
- Description:
- IC REG CHARGE PUMP 2VIN SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2765M6X/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 and 20-Ω typical output impedance in a 6-pin SOT-23 package. It serves as a compact, inductorless DC-DC boost solution for low-power portable systems requiring rail-to-rail voltage scaling.
For engineers reviewing the LM2765M6X/NOPB datasheet, LM2765M6X/NOPB pinout, LM2765M6X/NOPB application, or LM2765M6X/NOPB equivalent, key selection criteria include input voltage range (1.8–5.5 V), shutdown current (0.1 µA), switching frequency (50 kHz), output resistance (20 Ω), and SOT-23-6 thermal performance (RθJA = 185.2°C/W).
Technical Context
The LM2765M6X/NOPB implements a four-switch charge-pump topology with internal CMOS switches driven by a 50-kHz oscillator, enabling voltage doubling without magnetic components. Its functional mode is controlled via the SD pin, which disables switching and reduces quiescent current to 0.1 µA when pulled high above 40% of V+.
Output regulation relies on external flying (CAP+, CAP−) and output (OUT–GND) capacitors; output impedance is determined by switch RDS(on) (~8 Ω), capacitor ESR, and switching frequency. The device requires an external Schottky diode (e.g., 1N5817) only for startup to ensure oscillator enablement above 1.8 V.
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 external regulation. |
| Output Current | 20 mA max - sufficient for biasing op-amps, interface ICs, or small-signal analog circuitry. |
| Conversion Efficiency | 90% typical at 20 mA - minimizes power loss and thermal rise in battery-constrained designs. |
| Shutdown Current | 0.1 µA typical - enables ultra-low-power sleep modes in handheld instruments and pagers. |
| Switching Frequency | 50 kHz nominal - balances low EMI, capacitor size, and output ripple for cost-sensitive applications. |
| Output Impedance | 20 Ω typical - defines load-induced voltage drop (e.g., 400 mV drop at 20 mA); impacts regulation accuracy. |
| Junction Temperature | –40°C to +100°C - validated for industrial ambient operation with derated power dissipation. |
Pinout & Package
LM2765M6X/NOPB is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm × 1.45 mm max height, optimized for space-constrained PCB layouts and compatible with standard reflow profiles (MSL Level-1, 260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Power supply input | Primary DC input connection; must be bypassed with low-ESR ceramic capacitor near the pin. |
| 2 - GND | Ground reference | Common return path for V+, OUT, CAP−, and SD; critical for noise control and thermal dissipation. |
| 3 - CAP− | Flying capacitor negative terminal | Connects to negative side of external flying capacitor (C1); forms charge-transfer node in doubler cycle. |
| 4 - SD | Shutdown control input | Active-high logic input; >40% of V+ disables oscillator and reduces IQ to 0.1 µA. |
| 5 - OUT | Regulated output | Doubled voltage output (≈2×V+); connects to load and output capacitor (C2); rated for 40 mA absolute max. |
| 6 - CAP+ | Flying capacitor positive terminal | Connects to positive side of external flying capacitor (C1); alternately charges/discharges to generate 2×V+. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage doubling architecture | Eliminates inductors and transformers, reducing BOM cost and board area versus magnetic DC-DC solutions. |
| Low quiescent current | 130 µA operating current enables >100-hour runtime on coin cells in intermittent-use devices like PDAs. |
| Integrated 50-kHz oscillator | Fixed-frequency operation simplifies layout and eliminates external timing components or clock sources. |
| Thermal performance | RθJA = 185.2°C/W allows 600 mW max power dissipation at 25°C ambient-supports continuous 20 mA loads. |
| Startup diode support | External Schottky diode (e.g., 1N5817) ensures reliable oscillator start-up when VOUT < 1.8 V. |
Applications
| Cellular Phone Power Management | Operational Amplifier Bias Supply |
|---|---|
|
Use Scenario: Generating +5 V from a 2.7 V Li-ion battery to power RF front-end ICs and analog signal chains. IC Role / Device Role / Timing Role: Voltage-doubling charge pump providing stable, low-noise auxiliary rail independent of main PMIC. Use Value: Enables dual-rail op-amp operation and higher dynamic range without adding inductors or increasing EMI emissions. |
Use Scenario: Supplying ±5 V rails for rail-to-rail input/output op-amps in portable test equipment. IC Role / Device Role / Timing Role: Doubler IC generating positive boosted rail; paired with inverting charge pump for negative rail. Use Value: Achieves full op-amp swing with <100 mV dropout under 10 mA load-critical for precision sensor signal conditioning. |
| PDA Display Backlight Driver Support | Interface IC Voltage Translation |
|
Use Scenario: Providing 3.3 V → 6.6 V boost for white LED backlight strings in early PDA displays. IC Role / Device Role / Timing Role: High-efficiency voltage multiplier feeding constant-current LED driver IC inputs. Use Value: Delivers 15 mA at 92% efficiency-extends battery life while maintaining consistent brightness across discharge curve. |
Use Scenario: Elevating 3.3 V logic signals to 5 V for legacy microcontroller communication interfaces (e.g., UART, SPI). IC Role / Device Role / Timing Role: Low-impedance voltage source powering level-shifting buffers and bus transceivers. Use Value: 20 Ω output impedance ensures <50 mV droop at 2 mA interface load-preserves signal integrity and timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage doubler applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Higher 125-kHz switching frequency; 100 mA output capability; requires dual flying capacitors. | Supports higher current loads but consumes more quiescent current (150 µA vs. 130 µA) and lacks shutdown pin. | Choose MAX680ESA+ when >20 mA output or faster transient response is required; avoid if shutdown control or ultra-low IQ is critical. |
| TPS60230RTJR | Integrated flying capacitor; 3.3 V fixed output; 100 mA capability; 1-MHz switching frequency. | Delivers regulated 3.3 V from 1.8–5.5 V input-no external diode needed-but not programmable for variable VOUT. | Choose TPS60230RTJR for plug-and-play 3.3 V generation; select LM2765M6X/NOPB when adjustable 2×VIN output and minimal external parts are prioritized. |
Compared with MAX680ESA+ and TPS60230RTJR, LM2765M6X/NOPB offers the lowest component count for unregulated voltage doubling, the smallest footprint (SOT-23-6), and the lowest shutdown current-making it optimal for space- and battery-life-constrained portable electronics where precise output regulation is handled downstream.
Availability
LM2765M6X/NOPB is available at Aetrix Electronics and suitable for cellular phones, handheld instruments, and operational amplifier power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2765M6X/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 leader specializing in analog, embedded processing, and power management technologies, with over 90 years of innovation in high-reliability electronic components.
The LM2765 belongs to TI's switched-capacitor DC-DC converter product line, engineered specifically for ultra-low-power, inductorless voltage boosting in portable consumer electronics where size, efficiency, and simplicity are primary design constraints.
FAQ
What is the maximum output current supported by the LM2765M6X/NOPB?
The LM2765M6X/NOPB delivers up to 20 mA of continuous output current under recommended operating conditions (1.8–5.5 V input, 25°C ambient). Absolute maximum rating is 40 mA, but sustained operation above 20 mA increases output impedance and reduces efficiency due to internal switch RDS(on) heating. For higher current needs, paralleling multiple LM2765M6X/NOPB units is documented in the datasheet.
Does the LM2765M6X/NOPB require an external diode, and why?
Yes, the LM2765M6X/NOPB requires an external Schottky diode (e.g., 1N5817) during startup to ensure reliable oscillator enablement. The internal oscillator depends on voltage across OUT and GND exceeding 1.8 V; the diode provides initial charge to OUT before the charge-pump action begins. Once running, the diode is reverse-biased and inactive-no steady-state conduction occurs.
Can the LM2765M6X/NOPB operate from a 1.8 V input, and what is the resulting output voltage?
Yes, the LM2765M6X/NOPB is fully specified to operate from 1.8 V input, producing approximately 3.6 V output (2×VIN) under no-load conditions. At 20 mA load, output drops due to 20 Ω typical output impedance-yielding ~3.2 V. Output voltage scales linearly with input; efficiency remains >85% across the full 1.8–5.5 V range per TI characterization data.
What is the thermal performance of the LM2765M6X/NOPB in its SOT-23 package?
The LM2765M6X/NOPB in SOT-23 (DBV) package has a junction-to-ambient thermal resistance (RθJA) of 185.2°C/W. At 25°C ambient and 20 mA load (≈100 mW dissipation), junction temperature rise is ~18.5°C-well within the 100°C max operating limit. Derating is required above 85°C ambient; full 20 mA output is not recommended above 85°C per datasheet thermal limits.
How does the shutdown (SD) pin function on the LM2765M6X/NOPB?
The SD pin on the LM2765M6X/NOPB is an active-high digital input that disables the internal oscillator and switches when pulled above 40% of V+. In normal operation, SD is tied to GND; pulling SD ≥2 V (with V+ = 5 V) reduces supply current to 0.1 µA typical. The pin has no internal pull-down, so external grounding is mandatory for reliable enablement-floating SD may cause erratic behavior.
LM2765M6X/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
LM2765M6X/NOPB FAQ
1.How can I place an order for LM2765M6X/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2765M6X/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 LM2765M6X/NOPB reliable?
The price and inventory of LM2765M6X/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2765M6X/NOPB is usually 5 days.
3.What payment methods are accepted for LM2765M6X/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2765M6X/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2765M6X/NOPB?
LM2765M6X/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2765M6X/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 LM2765M6X/NOPB?
For technical support, including LM2765M6X/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2765M6X/NOPB requirements.
6.How does Aetrix verify that LM2765M6X/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2765M6X/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 LM2765M6X/NOPB meets industry standards.
7.What is the process for return or replacement of LM2765M6X/NOPB?
All LM2765M6X/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2765M6X/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 LM2765M6X/NOPB part is unused and in its original packaging.
Return procedure for LM2765M6X/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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