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Texas Instruments LM2788MM-1.5/NOPB
- Part No.:
- LM2788MM-1.5/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2788MM-1.5/NOPB.pdf
- Description:
- IC REG CHARGE PUMP 1.5V 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,535
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Product details
Overview
LM2788MM-1.5/NOPB from Texas Instruments is a fixed-output 1.5V switched-capacitor step-down DC/DC converter delivering up to 120mA output current with ±6% voltage tolerance, operating from 2.6V–5.5V input, and achieving up to 76% peak efficiency in Li-ion battery-powered portable instrumentation.
For engineers reviewing the LM2788MM-1.5/NOPB datasheet, LM2788MM-1.5/NOPB pinout, LM2788MM-1.5/NOPB application, or LM2788MM-1.5/NOPB equivalent, key selection considerations include its fractional multi-gain charge pump architecture (½, ⅔, 1), 32µA no-load supply current, 0.1µA shutdown current, VSSOP-8 package footprint, and absence of inductors for ultra-compact power rail generation.
Technical Context
The LM2788MM-1.5/NOPB implements pulse-frequency modulation (PFM) regulation with gain-hopping logic that dynamically selects between ½, ⅔, and 1 charge-pump gains based on real-time VIN and load conditions to maintain 1.5V regulation. Its internal non-overlapping clock drives two-phase switching of external flying capacitors (C1/C2), eliminating inductor requirements.
It integrates soft-start (400µs typical ramp), thermal shutdown (150°C trip), short-circuit protection (25mA limit), and logic-level enable control (VIH = 0.9×VIN, VIL ≤ 0.4V). The device operates across –40°C to +125°C junction temperature with 220°C/W θJA in VSSOP-8 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT | Fixed 1.5V ±6% - stable low-voltage rail for core logic or analog circuitry without feedback loop tuning. |
| IOUT max | 120mA - sufficient for powering microcontrollers, sensors, or RF front-ends in handheld devices. |
| VIN range | 2.6V–5.5V - compatible with single-cell Li-ion (2.7–4.2V), NiMH, or regulated 3.3V/5V supplies. |
| Efficiency | Up to 76% at 3.0–4.2V VIN and 60mA - minimizes heat rise and extends battery life in portable applications. |
| IQ / ISD | 32µA operating / 0.1µA shutdown - enables ultra-low-power sleep modes in always-on systems. |
| fSW | 500kHz fixed frequency - simplifies EMI filtering and supports compact ceramic capacitor selection. |
| Output ripple | 20mVp-p at 3.6V VIN, 120mA - meets noise-sensitive analog supply requirements with proper 10µF X5R/X7R output cap. |
Pinout & Package
LM2788MM-1.5/NOPB uses an 8-pin VSSOP package (DGK0008A), 3.0mm × 3.0mm body, 0.65mm pitch, thermally enhanced with exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Regulated output node | Delivers stable 1.5V to load; requires 10µF low-ESR ceramic bypass capacitor for ripple suppression. |
| C1− (Pin 2) | Flying capacitor negative terminal | Connects to negative side of first 1µF flying capacitor; must use non-polarized MLCC only. |
| C1+ (Pin 3) | Flying capacitor positive terminal | Connects to positive side of first 1µF flying capacitor; forms half of dual-phase charge transfer path. |
| VIN (Pin 4) | Main input supply | Accepts 2.6–5.5V; requires local 10µF ceramic decoupling to minimize input droop during charge phase. |
| EN (Pin 5) | Logic-enable input | Active-high control: ≥0.9×VIN = ON, ≤0.4V = shutdown; draws <30nA when disabled. |
| C2+ (Pin 6) | Second flying capacitor positive | Completes dual-capacitor charge pump topology; identical 1µF MLCC required as C1. |
| GND (Pin 7) | Power and signal reference | Single ground connection for all internal circuits; must be low-impedance plane for stability. |
| C2− (Pin 8) | Second flying capacitor negative | Paired with C2+; polarity reversal prohibited-only non-polarized ceramics permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-gain charge pump | Automatically switches among ½, ⅔, and 1 gains to maximize efficiency across full VIN/IOUT range-no external compensation needed. |
| No-inductor design | Eliminates magnetic components and associated EMI, size, and cost-ideal for space-constrained PCB layouts. |
| Gain-hopping regulation | Maintains 1.5V output under heavy load by transiently boosting gain, preventing droop without sacrificing base-efficiency. |
| Ultra-low quiescent current | 32µA operation and 0.1µA shutdown enable >1-year battery life in intermittent-sensing IoT nodes. |
| Integrated protections | Thermal shutdown (150°C), short-circuit current limiting (25mA), and soft-start (400µs) ensure robust field reliability. |
Applications
| Cellular Phone Baseband | Handheld Test Instrumentation |
|---|---|
Use Scenario: Powering 1.5V I/O banks and low-voltage ADC reference in dual-mode GSM/UMTS handsets. IC Role / Device Role / Timing Role: Primary step-down regulator converting single-cell Li-ion (3.0–4.2V) to clean 1.5V supply with minimal board area. Use Value: Enables direct integration into RF module PCBs without inductors, reducing BOM count and EMI filtering complexity. | Use Scenario: Supplying precision 1.5V bias to op-amp front-ends and SAR ADCs in portable multimeters. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source maintaining accuracy over battery discharge cycle. Use Value: 20mVp-p ripple and ±6% regulation ensure <0.1% measurement error drift across operating temperature. |
| HPC/PDA Core Logic | Wearable Sensor Hub |
Use Scenario: Generating 1.5V core voltage for ARM Cortex-M0/M3 microcontrollers in handheld computing devices. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting dynamic voltage scaling during CPU burst activity. Use Value: Gain-hopping maintains regulation during 0–120mA transients, avoiding brownouts during firmware execution peaks. | Use Scenario: Powering MEMS accelerometers and BLE SoCs in compact fitness trackers with coin-cell or thin-film batteries. IC Role / Device Role / Timing Role: Ultra-low-IQ regulator enabling multi-week standby with periodic wake-up sensing. Use Value: 0.1µA shutdown current extends shelf life and operational runtime without compromising startup responsiveness. |
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 |
|---|---|---|---|
| LM2787MM-1.5/NOPB | Same VSSOP-8 package, but uses single flying capacitor (C1 only); lower max IOUT (60mA); no gain-hopping. | Suitable only for light-load (<60mA), cost-sensitive designs where 76% efficiency is acceptable. | Select LM2787MM-1.5/NOPB if output current demand is ≤60mA and board space allows larger output capacitance to compensate for higher ripple. |
| TPS60403DBVR | 1.5V fixed output, 60mA max, 30µA IQ, but requires external resistors for feedback; no integrated gain selection. | Lacks multi-gain architecture-efficiency drops sharply below 3.3V VIN; not optimized for Li-ion discharge curve. | Choose TPS60403DBVR only for legacy designs already using resistor-programmed outputs and where 60mA limit is sufficient. |
Compared with LM2787MM-1.5/NOPB and TPS60403DBVR, LM2788MM-1.5/NOPB uniquely delivers 120mA at up to 76% efficiency across the full 2.6–5.5V Li-ion range via gain-hopping, making it the only option supporting high-current portable instrumentation without inductor trade-offs.
Availability
LM2788MM-1.5/NOPB is available at Aetrix Electronics and suitable for cellular phones, handheld instrumentation, HPC/PDA core logic, and wearable sensor hubs requiring stable component supply with long-term manufacturability assurance.
Supply support for LM2788MM-1.5/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 ICs, with decades of expertise in high-efficiency DC/DC conversion.
The LM2788 product line was engineered specifically for ultra-compact, inductorless power conversion in battery-powered portable electronics-prioritizing low quiescent current, wide input range, and seamless integration with ceramic capacitors only.
FAQ
What is the recommended flying capacitor value for LM2788MM-1.5/NOPB?
The LM2788MM-1.5/NOPB requires two identical 1.0µF X5R or X7R multilayer ceramic capacitors (MLCCs) for C1 and C2. TDK C1608X5R1A105K is a validated part. Polarized capacitors-including tantalum and aluminum electrolytics-are strictly prohibited due to risk of reverse bias damage during startup.
Does LM2788MM-1.5/NOPB support adjustable output voltage?
No, LM2788MM-1.5/NOPB provides a factory-trimmed fixed 1.5V output. It is not programmable or adjustable. Other variants-LM2788MM-1.8/NOPB and LM2788MM-2.0/NOPB-offer 1.8V and 2.0V fixed outputs respectively, but share identical pinout and functionality.
Can LM2788MM-1.5/NOPB operate with input voltage below 2.6V?
No-LM2788MM-1.5/NOPB has a minimum specified input voltage of 2.6V per Absolute Maximum Ratings and Operating Ratings. Operation below this threshold may result in loss of regulation, increased ripple, or failure to start. For sub-2.6V inputs, consider alternative architectures such as LDOs or inductor-based buck converters.
Is LM2788MM-1.5/NOPB RoHS compliant and lead-free?
Yes, LM2788MM-1.5/NOPB carries the /NOPB suffix indicating lead-free (Pb-free) and RoHS-compliant construction. It meets JEDEC J-STD-020 moisture sensitivity level 2a and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards.
How does gain-hopping affect output voltage ripple in LM2788MM-1.5/NOPB?
Gain-hopping increases output voltage ripple in LM2788MM-1.5/NOPB because it introduces additional switching transitions beyond the base 500kHz clock-particularly under high load (e.g., 120mA) and mid-range VIN (e.g., 3.0–3.3V). Ripple reaches 20mVp-p under worst-case conditions, necessitating careful selection of low-ESR 10µF X5R/X7R output capacitors.
LM2788MM-1.5/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):
- 1.5V
- 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-1.5/NOPB FAQ
1.How can I place an order for LM2788MM-1.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2788MM-1.5/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-1.5/NOPB reliable?
The price and inventory of LM2788MM-1.5/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-1.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM2788MM-1.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2788MM-1.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2788MM-1.5/NOPB?
LM2788MM-1.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2788MM-1.5/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-1.5/NOPB?
For technical support, including LM2788MM-1.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2788MM-1.5/NOPB requirements.
6.How does Aetrix verify that LM2788MM-1.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2788MM-1.5/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-1.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM2788MM-1.5/NOPB?
All LM2788MM-1.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2788MM-1.5/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-1.5/NOPB part is unused and in its original packaging.
Return procedure for LM2788MM-1.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2788MM-1.5/NOPB Tags
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TPS562201DDCR
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MC33063ADR
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MC34063EBD-TR
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