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Texas Instruments LM2788MM-1.8/NOPB
- Part No.:
- LM2788MM-1.8/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2788MM-1.8/NOPB.pdf
- Description:
- IC REG CHARGE PUMP 1.8V 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,715
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Product details
Overview
LM2788MM-1.8/NOPB from Texas Instruments is a fixed-output 1.8V, 120mA switched-capacitor step-down DC/DC converter in an 8-pin VSSOP package. It operates from 2.6V–5.5V input, delivers ±5% output voltage accuracy across load and input ranges, achieves up to 90% peak efficiency via multi-gain hopping (½, ⅔, 1), and features 32µA operating supply current - ideal for Li-ion–powered portable instrumentation and handheld devices.
For engineers reviewing the LM2788MM-1.8/NOPB datasheet, LM2788MM-1.8/NOPB pinout, LM2788MM-1.8/NOPB application, or LM2788MM-1.8/NOPB equivalent, key selection considerations include its gain-hopping PFM regulation architecture, absence of inductors, thermal/short-circuit protection, soft-start timing (~400µs), and compatibility with standard 1µF flying / 10µF bypass ceramic capacitors.
Technical Context
The LM2788MM-1.8/NOPB implements pulse-frequency modulation (PFM) regulation with fractional multi-gain charge pumping (½, ⅔, 1) to maintain tight output regulation while maximizing efficiency across 2.6V–5.5V input and 0–120mA load. Its internal gain-selection logic uses VIN sensing to set base gain (e.g., ⅔ for 2.9V–3.8V), then dynamically hops to higher gain under heavy load to compensate for droop.
Core circuit functions include soft-start ramp generation (~400µs), EN-controlled shutdown (0.1µA ISD), thermal shutdown at 150°C, short-circuit current limiting (~25mA), and integrated feedback reference (1.2V bandgap + 165mV offset). No external compensation or inductors are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.8V ±5% over 0–120mA load and 2.8–5.5V input - ensures stable core voltage for low-power microcontrollers and sensors. |
| IOUT Max | 120mA continuous - sufficient to power multiple analog front-ends or RF modules in compact portable systems. |
| Efficiency | Up to 90% peak (VIN=3.0V, IOUT=60mA); 82% average over Li-ion range (3.0–4.2V) - minimizes battery drain and self-heating. |
| IQ / ISD | 32µA operating / 0.1µA shutdown supply current - extends standby time in always-on sensor nodes. |
| fSW | 500kHz fixed switching frequency - enables use of small 1µF MLCC flying capacitors and simplifies EMI filtering. |
| VIN Range | 2.6V to 5.5V - supports single-cell Li-ion (2.7–4.2V), LiFePO4, or dual-cell alkaline inputs without pre-regulation. |
| VRIPPLE | 20mVp-p typical (VIN=3.6V, IOUT=120mA) - meets noise-sensitive analog supply requirements when paired with 10µF X5R/X7R output cap. |
Pinout & Package
LM2788MM-1.8/NOPB is housed in an 8-pin VSSOP package (DGK0008A), 3.0mm × 3.0mm × 1.0mm body, 0.65mm pitch, exposed pad not present. Thermal resistance θJA = 220°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output voltage node | Delivers 1.8V to load; requires 10µF low-ESR ceramic bypass capacitor to ground for ripple suppression and loop stability. |
| C1− (Pin 2) | Negative terminal of first flying capacitor | Connects to C1− of 1µF flying cap; forms half of two-phase charge transfer path - polarity must be observed with non-polar ceramics. |
| C1+ (Pin 3) | Positive terminal of first flying capacitor | Connects to C1+ of same 1µF flying cap; internal switch network alternates C1/C2 between charge and pump phases at 500kHz. |
| VIN (Pin 4) | Main input supply connection | Accepts 2.6–5.5V; requires local 10µF X5R/X7R ceramic decoupling to minimize input droop during charge phase. |
| EN (Pin 5) | Active-high enable control input | Logic high (≥0.9×VIN) enables operation; logic low (<0.4V) forces 0.1µA shutdown - supports system-level power sequencing. |
| C2+ (Pin 6) | Positive terminal of second flying capacitor | Completes dual-capacitor charge pump topology; identical 1µF value and type as C1 required for balanced gain performance. |
| GND (Pin 7) | Power and signal reference ground | Single-point return for VIN, VOUT, EN, and flying caps; layout must minimize impedance to preserve regulation accuracy and EMI performance. |
| C2− (Pin 8) | Negative terminal of second flying capacitor | Paired with C2+ to form second flying capacitor leg - reverse-biasing must be avoided; polarized caps prohibited. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-gain hopping (½, ⅔, 1) | Automatically selects optimal gain based on VIN and load to sustain >82% average efficiency across full Li-ion discharge curve. |
| PFM regulation with soft-start | Eliminates inrush current via controlled ~400µs VOUT ramp; idle-mode current drops to 32µA, reducing light-load losses. |
| No-inductor architecture | Relies solely on four external MLCCs (2×1µF flying, 2×10µF bypass) - saves PCB area, cost, and EMI concerns vs. inductive buck converters. |
| Integrated protection | Thermal shutdown (150°C trip), short-circuit current limit (~25mA), and EN-controlled disconnect prevent damage during fault conditions. |
| Low-noise output | 20mVp-p ripple at full load enables direct powering of ADC references, op-amps, and RF bias rails without additional LDO post-regulation. |
Applications
| Portable Medical Sensors | Wearable Health Monitors |
|---|---|
Use Scenario: Powering ultra-low-power analog front-end (AFE) and BLE SoC in disposable glucose or ECG patch sensors. IC Role / Device Role / Timing Role: Provides clean, regulated 1.8V rail from single Li-ion cell; replaces discrete LDO + charge pump combos. Use Value: 90% peak efficiency and 0.1µA shutdown extend battery life beyond 7 days; no inductor allows <10mm² solution size. | Use Scenario: Supplying 1.8V to motion sensor hub (accelerometer + gyroscope + MCU) in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Delivers stable voltage despite varying Li-ion voltage (3.0–4.2V) and pulsed 100mA BLE transmit loads. Use Value: Gain-hopping maintains regulation during RF bursts; 20mVp-p ripple avoids sensor measurement errors. |
| Handheld Test Equipment | Industrial IoT Edge Nodes |
Use Scenario: Generating 1.8V for precision ADC and reference buffers in battery-operated multimeters or oscilloscope probes. IC Role / Device Role / Timing Role: Replaces inefficient linear regulators to reduce self-heating and improve measurement stability. Use Value: Low 32µA quiescent current preserves battery runtime during standby; thermal shutdown prevents drift during extended measurements. | Use Scenario: Powering LoRaWAN transceiver and ARM Cortex-M0+ MCU in solar-charged remote environmental sensors. IC Role / Device Role / Timing Role: Steps down wide-input (2.6–5.5V) from supercapacitor or LiPo to fixed 1.8V logic rail with minimal BOM. Use Value: 500kHz switching enables tiny 1µF flying caps; 8-pin VSSOP footprint integrates easily into space-constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Fixed 3.3V output; 60mA max IOUT; 90% peak efficiency; same VSSOP-8 package | Lower current capability limits use to sub-60mA logic rails; lacks gain-hopping for wide-VIN optimization | Select only if 3.3V output and lower load current are acceptable; verify EN logic compatibility (active-high same). |
| MAX881REUA+ | Fixed 1.8V output; 100mA max IOUT; 85% peak efficiency; 8-pin µMAX package (0.05" pitch) | Smaller package but non-standard footprint; slightly lower current and efficiency; no soft-start | Consider for legacy MAXIM-based designs where µMAX footprint is already allocated; not drop-in due to package mismatch. |
Compared with LM2788MM-1.8/NOPB, TPS60403DBVR offers identical package and efficiency but targets higher-voltage rails with reduced current, while MAX881REUA+ provides similar 1.8V output in a smaller but incompatible package and lacks gain-hopping - making LM2788MM-1.8/NOPB the optimal choice for new 120mA, wide-input, high-efficiency portable designs.
Availability
LM2788MM-1.8/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, handheld test equipment, and industrial IoT edge nodes requiring stable component supply and long-term design continuity.
Supply support for LM2788MM-1.8/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM2788 series was designed specifically for ultra-compact, inductorless DC/DC conversion in battery-powered portable electronics - emphasizing high efficiency across full input and load ranges without external magnetics.
FAQ
What is the output voltage tolerance of the LM2788MM-1.8/NOPB over temperature and load?
The LM2788MM-1.8/NOPB guarantees ±5% output voltage tolerance over the full operating junction temperature range (–40°C to +125°C) and load current range (0–120mA), provided VIN remains within 2.8–4.2V. At higher VIN (4.2–5.5V), tolerance widens to ±6%. This specification is verified per TI's SNVS198C datasheet Electrical Characteristics table and applies with recommended 1µF flying and 10µF bypass capacitors.
Does the LM2788MM-1.8/NOPB require external compensation components?
No, the LM2788MM-1.8/NOPB does not require external compensation components. Its PFM control loop and gain-hopping architecture are fully integrated and factory-trimmed. Stability is ensured using only the four specified external ceramic capacitors: two 1µF flying caps (C1, C2) and two 10µF bypass caps (CIN, COUT). Adding resistors or capacitors to the feedback path will disrupt regulation and is not supported.
Can the LM2788MM-1.8/NOPB be used with tantalum or electrolytic capacitors?
No, the LM2788MM-1.8/NOPB is not compatible with tantalum or aluminum electrolytic capacitors. Its charge-pump operation demands low-ESR (<15mΩ typical) and non-polar characteristics. Tantalum and electrolytics exhibit high ESR and polarity sensitivity - using them risks excessive ripple, gain-hopping instability, and potential reverse-bias damage to flying caps. Only X5R or X7R MLCCs are qualified per TI's application guidance.
What happens to the output during LM2788MM-1.8/NOPB shutdown?
During shutdown (EN pin low), the LM2788MM-1.8/NOPB completely disconnects its output from the input and internal circuitry. VOUT collapses to 0V unless externally driven. The device draws only 0.1µA supply current. If an external source drives VOUT above VIN during shutdown, a small current flows through the internal feedback divider (VOUT-to-GND), so external driving must remain below VIN to avoid unintended conduction.
Is the LM2788MM-1.8/NOPB still in active production?
The LM2788MM-1.8/NOPB is marked OBSOLETE in TI's official documentation (SNVS198C, revised April 2013), indicating it is no longer in active production. However, Aetrix Electronics maintains verified, traceable inventory sourced from authorized channels and supports legacy design continuity, including full documentation, application guidance, and lifecycle coordination for existing programs.
LM2788MM-1.8/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 120mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LM2788MM-1.8/NOPB FAQ
1.How can I place an order for LM2788MM-1.8/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2788MM-1.8/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 LM2788MM-1.8/NOPB reliable?
The price and inventory of LM2788MM-1.8/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2788MM-1.8/NOPB is usually 5 days.
3.What payment methods are accepted for LM2788MM-1.8/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2788MM-1.8/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2788MM-1.8/NOPB?
LM2788MM-1.8/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2788MM-1.8/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 LM2788MM-1.8/NOPB?
For technical support, including LM2788MM-1.8/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2788MM-1.8/NOPB requirements.
6.How does Aetrix verify that LM2788MM-1.8/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2788MM-1.8/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 LM2788MM-1.8/NOPB meets industry standards.
7.What is the process for return or replacement of LM2788MM-1.8/NOPB?
All LM2788MM-1.8/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2788MM-1.8/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 LM2788MM-1.8/NOPB part is unused and in its original packaging.
Return procedure for LM2788MM-1.8/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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