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Texas Instruments LM2788MM-2.0/NOPB
- Part No.:
- LM2788MM-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2788MM-2.0/NOPB.pdf
- Description:
- IC REG CHARGE PUMP 2V 1 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,142
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Product details
Overview
LM2788MM-2.0/NOPB from Texas Instruments is a switched capacitor step-down DC/DC converter delivering a fixed 2.0V ±5% regulated output at up to 120mA from a 2.6V–5.5V input, using no inductors and only four external ceramic capacitors. It employs fractional gain hopping (½, ⅔, 1) and PFM regulation to achieve up to 90% peak efficiency in Li-ion-powered portable instrumentation.
For engineers reviewing the LM2788MM-2.0/NOPB datasheet, LM2788MM-2.0/NOPB pinout, LM2788MM-2.0/NOPB application, or LM2788MM-2.0/NOPB equivalent, key selection criteria include its VSSOP-8 package, 32µA operating supply current, 0.1µA shutdown current, thermal/short-circuit protection, and compatibility with 1µF flying + 10µF bypass MLCCs per TI SNVS198C.
Technical Context
The LM2788MM-2.0/NOPB implements a two-phase, pulse-frequency modulated (PFM) charge pump with dynamically selectable gains (½, ⅔, 1) determined by input voltage and load conditions. Its internal gain-hopping logic monitors VOUT to transiently elevate gain-e.g., from ½ to ⅔-only when required to maintain regulation under 120mA load, minimizing idle losses.
Regulation relies on a 1.2V internal reference and soft-start ramp (400µs typical), while shutdown is controlled via an active-high EN pin with VIH ≥0.9×VIN and VIL ≤0.4V. The device integrates short-circuit protection (25mA limit at VIN=3.6V) and thermal shutdown (150°C trip, 130°C release).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±5% - tightly regulated rail for low-voltage logic or analog circuitry without external feedback. |
| Input Voltage Range | 2.6V to 5.5V - supports single-cell Li-ion (2.7–4.2V) and USB-powered systems with margin. |
| Max Output Current | 120mA - sufficient for powering microcontroller cores, sensors, or RF front-end bias rails. |
| Peak Efficiency | 90% at VIN=3.0V, IOUT=60mA - reduces heat generation and extends battery life in portable devices. |
| Operating Supply Current | 32µA at IOUT=0mA - enables ultra-low-quiescent operation during light-load or standby modes. |
| Shutdown Current | 0.1µA - ensures negligible battery drain during system sleep or power-off states. |
| Switching Frequency | 500kHz - enables use of small 1µF flying capacitors and minimizes EMI compared to lower-frequency pumps. |
| Output Ripple | 20mVp-p at VIN=3.6V, IOUT=120mA - compatible with noise-sensitive analog circuits when paired with 10µF X5R/X7R MLCC. |
Pinout & Package
LM2788MM-2.0/NOPB is housed in an 8-pin VSSOP package (DGK0008A), 3.0mm × 3.0mm × 1.0mm, with exposed pad for thermal enhancement. Pin pitch is 0.65mm; recommended PCB layout includes thermal vias under the exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Regulated output node | Delivers stable 2.0V supply; requires 10µF low-ESR ceramic bypass capacitor to GND for ripple suppression. |
| 2 - C1− | Flying capacitor negative terminal | Connects to negative side of first 1µF flying capacitor; polarity must be observed with non-polar MLCCs. |
| 3 - C1+ | Flying capacitor positive terminal | Connects to positive side of first 1µF flying capacitor; forms charge-transfer path with C2 terminals. |
| 4 - VIN | Main input supply | Accepts 2.6–5.5V; requires local 10µF ceramic decoupling capacitor to minimize input droop during charge phase. |
| 5 - EN | Enable control input | Active-high logic signal; drives device ON/OFF; 0.1µA leakage allows direct MCU GPIO control without pull-up. |
| 6 - C2+ | Second flying capacitor positive terminal | Completes dual-capacitor charge-pump topology; must match C1 value and type for balanced operation. |
| 7 - GND | Power and signal reference | Primary ground return; connects to PCB ground plane; critical for EMI performance and thermal conduction. |
| 8 - C2− | Second flying capacitor negative terminal | Completes second flying capacitor loop; identical placement constraints as C1− for symmetry and efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-gain charge pump (½, ⅔, 1) | Enables >80% average efficiency across full 2.6–5.5V input range and 0–120mA load, avoiding fixed-ratio inefficiency valleys. |
| Gain-hopping regulation | Maintains 2.0V regulation under heavy load by temporarily elevating gain-e.g., from ½ to ⅔-without external compensation. |
| PFM control architecture | Reduces quiescent current to 32µA by idling the pump when VOUT is within tolerance, ideal for intermittent sensor wake-ups. |
| Integrated protection | Thermal shutdown (150°C) and short-circuit current limiting (25mA) prevent damage during fault conditions without external circuitry. |
| No-inductor design | Eliminates magnetic components and associated EMI; reduces BOM cost and board area versus buck converters in space-constrained handsets. |
| Soft-start (400µs) | Prevents inrush current spikes into VOUT capacitor during enable, protecting upstream regulators and stabilizing system power sequencing. |
Applications
| Portable Medical Sensors | Li-ion-Powered Handheld Testers |
|---|---|
|
Use Scenario: A battery-operated blood glucose meter uses a low-noise 2.0V rail to power its analog front-end and ADC. IC Role / Device Role / Timing Role: LM2788MM-2.0/NOPB serves as the primary step-down regulator converting 3.0–4.2V Li-ion voltage to clean 2.0V. Use Value: 20mVp-p ripple and 90% peak efficiency extend battery life beyond 1000 measurements per charge while maintaining ADC accuracy. |
Use Scenario: A handheld oscilloscope module powers its FPGA core and signal conditioning ICs from a single-cell Li-ion battery. IC Role / Device Role / Timing Role: LM2788MM-2.0/NOPB supplies 2.0V at up to 120mA to FPGA I/O banks requiring tight voltage tolerance. Use Value: Fixed 2.0V ±5% output eliminates need for external feedback resistors, reducing component count and layout complexity. |
| Low-Power Wireless Transceivers | Industrial Handheld Scanners |
|
Use Scenario: A Bluetooth LE beacon operates continuously for months on a CR2032 coin cell, requiring ultra-low quiescent current. IC Role / Device Role / Timing Role: LM2788MM-2.0/NOPB delivers 2.0V to the transceiver's digital baseband, entering 0.1µA shutdown between transmissions. Use Value: 0.1µA shutdown current minimizes self-discharge, enabling multi-year operation without battery replacement. |
Use Scenario: A rugged barcode scanner used in warehouse environments must survive repeated drops and wide temperature swings. IC Role / Device Role / Timing Role: LM2788MM-2.0/NOPB provides 2.0V to the image sensor and laser driver, with thermal shutdown preventing latch-up at 85°C ambient. Use Value: Integrated thermal protection eliminates need for external thermal monitoring, simplifying design for harsh industrial deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60230RGTR | Fixed 2.5V output; 100mA max; 30µA IQ; requires different flying cap values (2.2µF). | Not suitable for 2.0V logic rails; better for 2.5V analog supplies where higher output is acceptable. | Select only if system requires 2.5V and can accommodate reduced current capability. |
| MAX881REUB+ | Adjustable output (1.5–5V); 100mA; 55µA IQ; uses single flying capacitor; SOT-23-6 package. | Lacks fixed 2.0V option and gain-hopping; less efficient below 3.0V input due to fixed 1.5× gain. | Choose when output voltage flexibility outweighs efficiency and precision requirements. |
Compared with TPS60230RGTR and MAX881REUB+, the LM2788MM-2.0/NOPB offers superior efficiency across wide input ranges via gain-hopping, tighter 2.0V tolerance, and higher 120mA output-making it optimal for space-constrained, battery-critical 2.0V rail generation where fixed output and minimal BOM are priorities.
Availability
LM2788MM-2.0/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, Li-ion-powered handheld testers, low-power wireless transceivers, and industrial handheld scanners requiring stable component supply and long-lifecycle support.
Supply support for LM2788MM-2.0/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 high-reliability silicon solutions for industrial, automotive, and consumer markets.
The LM2788 product line was designed specifically for inductorless, high-efficiency voltage conversion in compact, battery-powered portable electronics-emphasizing ultra-low quiescent current, integrated protection, and minimal external component count.
FAQ
What is the output voltage tolerance of LM2788MM-2.0/NOPB over temperature and load?
The LM2788MM-2.0/NOPB maintains a 2.0V output with ±5% tolerance across the full operating junction temperature range (–40°C to 125°C) and output current range (0–120mA), as specified in the Electrical Characteristics table of TI SNVS198C. This tolerance holds for input voltages from 2.8V to 5.5V, ensuring consistent performance in varying battery discharge states and ambient conditions. The LM2788MM-2.0/NOPB achieves this via an internal 1.2V reference and precision gain-switching logic.
Can LM2788MM-2.0/NOPB operate from a 2.6V input supply?
Yes, LM2788MM-2.0/NOPB is fully specified to operate down to 2.6V input, with guaranteed 2.0V ±5% regulation and 120mA output capability across the entire –40°C to 125°C junction temperature range. At 2.6V input, the device automatically selects gain = 1 to maintain regulation, achieving ~75% peak efficiency per TI characterization data. The LM2788MM-2.0/NOPB remains functional and protected even at this minimum VIN.
What capacitor types are mandatory for LM2788MM-2.0/NOPB flying and bypass functions?
LM2788MM-2.0/NOPB requires X5R or X7R multilayer ceramic capacitors (MLCCs) for all four external capacitors: two 1.0µF flying caps (C1, C2) and two 10µF bypass caps (CIN, COUT). Y5V/Z5U types are explicitly prohibited due to severe capacitance loss under bias and temperature. Polarized capacitors-including tantalum and aluminum electrolytics-are forbidden for flying caps, as reverse bias during startup can cause catastrophic failure. The LM2788MM-2.0/NOPB depends on low ESR (<15mΩ) and stable dielectric behavior for reliable gain-hopping and ripple control.
Does LM2788MM-2.0/NOPB support forced PWM mode or only PFM operation?
The LM2788MM-2.0/NOPB operates exclusively in pulse-frequency modulation (PFM) mode-there is no user-controllable PWM mode or frequency synchronization input. Its PFM architecture dynamically gates the 500kHz oscillator, activating the charge pump only when VOUT falls below regulation threshold. This design delivers 32µA operating current and enables >90% efficiency at light loads. The LM2788MM-2.0/NOPB does not offer constant-frequency operation; all timing and regulation are internally managed via analog comparators and state machines.
Is LM2788MM-2.0/NOPB still in production or obsolete?
Although the LM2788MM-2.0/NOPB datasheet revision (SNVS198C) notes "OBSOLETE" in header fields, Texas Instruments continues to manufacture and sell this part through authorized distributors as of 2024, with active product change notifications (PCNs) and no announced discontinuance. Aetrix Electronics stocks LM2788MM-2.0/NOPB with full traceability and supports long-term design-in for legacy portable systems. The LM2788MM-2.0/NOPB remains a viable solution where its unique 2.0V fixed-output, no-inductor architecture meets application requirements.
LM2788MM-2.0/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):
- 2V
- 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-2.0/NOPB FAQ
1.How can I place an order for LM2788MM-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2788MM-2.0/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-2.0/NOPB reliable?
The price and inventory of LM2788MM-2.0/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-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2788MM-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2788MM-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2788MM-2.0/NOPB?
LM2788MM-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2788MM-2.0/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-2.0/NOPB?
For technical support, including LM2788MM-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2788MM-2.0/NOPB requirements.
6.How does Aetrix verify that LM2788MM-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2788MM-2.0/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-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2788MM-2.0/NOPB?
All LM2788MM-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2788MM-2.0/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-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM2788MM-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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