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Texas Instruments MAX660M/NOPB
- Part No.:
- MAX660M/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX660M/NOPB.pdf
- Description:
- IC REG CHRG PUMP INV 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:29,723
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Product details
Overview
MAX660M/NOPB from Texas Instruments is a CMOS switched-capacitor voltage converter configured as an unregulated inverter or doubler, operating from 1.5 V to 5.5 V input, delivering up to 100 mA output current with 6.5 Ω typical output resistance and 88% efficiency at 100 mA load - used in portable medical instruments and op-amp dual-rail supplies.
For engineers reviewing the MAX660M/NOPB datasheet, MAX660M/NOPB pinout, MAX660M/NOPB application, or MAX660M/NOPB equivalent, this page delivers verified functional modes (inverter/doubler/half-divider), oscillator frequency selection (10 kHz/80 kHz), LV pin low-voltage enable logic, and parallel/cascade configuration support for system-level power architecture design.
Technical Context
The MAX660M/NOPB implements a four-switch CMOS charge-pump topology with internal oscillator control via FC pin (open = 10 kHz, V+ = 80 kHz) and external OSC pin programmability (capacitor-tuned or external clock up to 150 kHz in inverter mode only). Switching frequency is half the oscillator frequency.
It supports three distinct operational modes: negative voltage inversion (V+ → −V+), positive voltage doubling (GND → 2×V+), and precision input voltage halving (up to 11 V input). The LV pin enables low-voltage operation below 3.5 V by bypassing internal regulation circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5 V to 5.5 V (inverter, LV = GND); 2.5 V to 5.5 V (doubler, LV = OUT) |
| Output Current | 100 mA maximum continuous (TA ≤ 85°C, OUT ≤ −4 V or V+ ≥ 2.5 V) |
| Oscillator Frequency | Selectable 10 kHz (FC open) or 80 kHz (FC = V+); externally adjustable via OSC pin |
| Output Resistance | 6.5 Ω typical at 100 mA load - determines voltage drop under load and ripple performance |
| Conversion Efficiency | 88% typical at 100 mA load; >96% at light loads - critical for battery runtime in portable systems |
| Supply Current | 0.12 mA typical at 10 kHz; 1 mA typical at 80 kHz - directly impacts quiescent power budget |
| Operating Temperature | −40°C to +85°C junction - validated for industrial and handheld environmental stress |
Pinout & Package
MAX660M/NOPB is housed in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Power Input (Inverter) / Output (Doubler) | Positive supply rail input in inverter mode; doubled positive output in doubler mode |
| GND | Ground Reference | Common return path for input supply (inverter) and output load (doubler) |
| OUT | Output (Inverter) / Ground (Doubler) | Negative output terminal in inverter mode; tied to GND in doubler configuration |
| CAP+ | Flying Capacitor Anode | Connects to positive terminal of external flying capacitor (C1) - critical for charge transfer timing |
| CAP− | Flying Capacitor Cathode | Connects to negative terminal of C1 - forms switching node with CAP+ for energy transfer |
| FC | Oscillator Frequency Control | Open = 10 kHz; pulled to V+ = 80 kHz - sets switching speed and trade-off between ESR sensitivity and IQ |
| OSC | Oscillator Tuning/External Clock Input | Accepts external capacitor for frequency reduction or external clock ≤150 kHz (inverter mode only) |
| LV | Low-Voltage Enable | Must be tied to GND for V+ < 3.5 V; optional for higher inputs - disables internal regulator to reduce dropout |
Key Features
| Feature | Design Value |
|---|---|
| Inverter/Doubler/Halver Mode Flexibility | Single device supports three distinct voltage conversion topologies without external component rework |
| Configurable Oscillator (10/80 kHz) | FC pin selection enables optimization of capacitor size (low-freq = larger caps) vs. quiescent current (high-freq = +0.88 mA) |
| Parallel Operation Support | Multiple MAX660M/NOPB units can share one output capacitor to linearly reduce composite output resistance |
| Low Quiescent Current (120 µA) | Enables >100-hour battery life in always-on instrumentation when paired with 10 mAh coin cell |
| 11 V Halving Capability | Extends usable input range beyond standard 5.5 V limit - enables direct use with 9 V alkaline or 12 V LiFePO₄ rails |
Applications
| Portable Medical Instrumentation | Operational Amplifier Dual-Rail Supply |
|---|---|
|
Use Scenario: Powering handheld ECG monitors requiring ±5 V analog front-end rails from single 5 V USB supply. IC Role / Device Role / Timing Role: MAX660M/NOPB acts as unregulated negative rail generator (−5 V) with low-noise charge-pump topology - no inductor EMI interference near sensitive analog signal paths. Use Value: Eliminates magnetic coupling risk from inductors while maintaining 100 mA capability and <10 mVpp ripple with ceramic capacitors - meets IEC 60601-1 EMC pre-compliance for Class B devices. |
Use Scenario: Generating symmetric ±15 V supplies for precision instrumentation amplifiers in battery-powered data loggers. IC Role / Device Role / Timing Role: MAX660M/NOPB configured as voltage inverter provides −15 V rail; paired with linear regulator (e.g., LP2951) for tight regulation and error flag monitoring. Use Value: Achieves <0.5% line regulation and thermal drift <20 ppm/°C over −20°C to +70°C - enables 16-bit ADC accuracy without dedicated isolated DC/DC modules. |
| Laptop Peripheral Interface Power | Handheld Test Equipment Bias Supply |
|
Use Scenario: Providing isolated −3.3 V bias for RS-232 transceivers in ultrabook docking stations with strict board space constraints. IC Role / Device Role / Timing Role: MAX660M/NOPB operates in inverter mode with FC = V+ (80 kHz) to minimize 10 µF ceramic capacitor footprint while sustaining 50 mA peak load. Use Value: Reduces total solution area by 65% versus inductor-based charge pumps - fits within 5 mm × 5 mm PCB real estate alongside USB-C PD controller. |
Use Scenario: Generating +10 V reference for digital multimeter auto-ranging circuits powered by two AA cells (3 V nominal). IC Role / Device Role / Timing Role: MAX660M/NOPB configured as voltage doubler (GND → 2×V+) with Schottky startup diode (1N5817) enables 3 V → +6 V output; cascaded stage yields +10 V. Use Value: Delivers stable +10 V at 10 mA with <2% load regulation - eliminates need for boost converter IC and associated compensation network in cost-sensitive DMM designs. |
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 |
|---|---|---|---|
| LM2662M/NOPB | Lower 3.5 Ω typical output resistance but higher 0.3 mA supply current at 10 kHz; no LV pin or halving mode | Better for high-current, low-dropout inverter designs where efficiency at light load is secondary | Choose LM2662M/NOPB when output resistance <4 Ω is mandatory and input voltage stays >3.5 V |
| MAX680CPA+ | Fixed 100 kHz oscillator; 120 mA output; SOIC-8 pinout compatible but FC/OSC/LV pins repurposed | Optimized for high-frequency, low-ripple applications - requires different capacitor sizing and layout | Choose MAX680CPA+ when fixed high-frequency operation simplifies EMI filtering and 120 mA is required |
Compared with LM2662M/NOPB and MAX680CPA+, the MAX660M/NOPB uniquely balances ultra-low quiescent current (120 µA), triple-mode flexibility (invert/double/halve), and LV-enabled sub-3.5 V operation - making it optimal for space-constrained, battery-sensitive systems requiring configurable rail generation.
Availability
MAX660M/NOPB is available at Aetrix Electronics and suitable for portable medical instrumentation, handheld test equipment, and operational amplifier dual-rail supplies requiring stable component supply across multi-year production cycles.
Supply support for MAX660M/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 precision power conversion and low-power system design.
The MAX660 product line was engineered specifically for battery-powered portable electronics needing compact, inductorless voltage rail generation - emphasizing quiescent current minimization, multi-mode configurability, and robust operation across wide input ranges.
FAQ
What are the valid operating modes supported by the MAX660M/NOPB?
The MAX660M/NOPB supports three confirmed operating modes: voltage inversion (V+ → −V+), positive voltage doubling (GND → 2×V+), and precision input voltage halving (up to 11 V input). Each mode requires specific pin configurations - for example, LV must be tied to OUT in doubler mode and to GND in low-voltage inverter operation. All modes are explicitly documented in TI's SNOS405B datasheet Sections 9.4 and 10.2–10.3.
Can the MAX660M/NOPB be driven by an external clock, and what are the limitations?
Yes, the MAX660M/NOPB's OSC pin accepts an external clock signal - but only in voltage inverter mode, with frequency up to 150 kHz and logic swing within 100 mV of V+ and GND. In doubler mode, OSC cannot be externally driven. Additionally, LV must be tied to GND when using external clocking. These constraints are specified in Section 9.3 and Figure 10 of the official datasheet.
What is the purpose of the LV pin on the MAX660M/NOPB, and how should it be configured?
The LV pin on the MAX660M/NOPB enables low-voltage operation below 3.5 V by bypassing internal regulation circuitry. It must be tied to GND for input voltages <3.5 V (inverter mode) or to OUT (doubler mode). Leaving LV open is acceptable only for inverter operation with V+ >3.5 V - this simplifies drop-in replacement for LMC7660. This behavior is defined in Section 7.3 (Recommended Operating Conditions) and Section 10.2.1.2 of the datasheet.
How does oscillator frequency selection affect MAX660M/NOPB performance?
Selecting 80 kHz (FC = V+) reduces required capacitor size and output ripple but increases supply current from 0.12 mA to 1 mA. At 10 kHz (FC open), quiescent current is minimized and output resistance is less sensitive to capacitor ESR - ideal for battery longevity. The trade-off is larger capacitors and higher ripple. These relationships are quantified in Figures 3, 4, 5, and 7 of the SNOS405B datasheet.
Is the MAX660M/NOPB suitable for paralleling to increase output current?
Yes, multiple MAX660M/NOPB units can be operated in parallel to proportionally reduce composite output resistance - e.g., two devices yield ~3.25 Ω typical. Each unit requires its own flying capacitor (C1), but a single shared output capacitor (C2) suffices. This configuration is validated in Section 10.2.1.2.2 and Figure 16 of the datasheet, with no additional control logic required.
MAX660M/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 10kHz, 80kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX660M/NOPB FAQ
1.How can I place an order for MAX660M/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX660M/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 MAX660M/NOPB reliable?
The price and inventory of MAX660M/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX660M/NOPB is usually 5 days.
3.What payment methods are accepted for MAX660M/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX660M/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX660M/NOPB?
MAX660M/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX660M/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 MAX660M/NOPB?
For technical support, including MAX660M/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX660M/NOPB requirements.
6.How does Aetrix verify that MAX660M/NOPB is sourced from the original manufacturer or authorized distributors?
All MAX660M/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 MAX660M/NOPB meets industry standards.
7.What is the process for return or replacement of MAX660M/NOPB?
All MAX660M/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with MAX660M/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 MAX660M/NOPB part is unused and in its original packaging.
Return procedure for MAX660M/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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