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Analog Devices Inc./Maxim Integrated MAX660CSA+TG068
- Part No.:
- MAX660CSA+TG068
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Encoders, Decoders, Converters
- Package:
- -
- Datasheet:
-
MAX660CSA+TG068.pdf
- Description:
- MOS MONOLITHIC VOLTAGE CONVERTER
- Quantity:
- Payment:
- Shipping:
Inventory:421
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Product details
Overview
MAX660CSA+TG068 from Maxim Integrated is a CMOS monolithic charge-pump voltage converter that inverts +1.5V to +5.5V input to -1.5V to -5.5V output or doubles input to +3.0V to +11.0V, delivers 100mA output current, features selectable 10kHz/80kHz oscillator frequency via FC pin, and achieves >90% efficiency at mid-load - widely used in handheld instruments and op-amp dual-supply generation.
For engineers reviewing the MAX660CSA+TG068 datasheet, MAX660CSA+TG068 pinout, MAX660CSA+TG068 application, or MAX660CSA+TG068 equivalent, this page provides verified technical context, confirmed pin functions, real-world load-performance tradeoffs, capacitor sizing guidance for ripple control, and validated alternatives for inverting/doubling DC-DC conversion without inductors.
Technical Context
The MAX660CSA+TG068 implements a two-phase switched-capacitor topology with internal CMOS switches, supporting both inverting and voltage-doubling modes via LV pin configuration (LV = GND for inverter, LV = OUT for doubler). Its oscillator frequency is programmable via FC pin (10kHz typ or 80kHz typ) or externally driven at OSC, with charge-pump frequency fixed at half the oscillator frequency.
Output regulation is passive: output voltage droop is governed by 6.5Ω typical output impedance plus external capacitor ESR and capacitance values. Ripple voltage scales inversely with C2 value and pump frequency - e.g., 90mVpp at 100mA with 150µF/0.2Ω C2 and 5kHz pump frequency - making capacitor selection critical for noise-sensitive analog rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5V to +5.5V - supports single-cell Li-ion, 3.3V, and 5V logic rails without external regulation. |
| Output Current | 100mA continuous - sufficient for dual-rail op-amps, LCD bias, and low-power analog circuitry. |
| Oscillator Frequency | 10kHz typ (FC open) or 80kHz typ (FC = V+) - selects tradeoff between quiescent current (120µA vs 1mA) and capacitor size. |
| Output Impedance | 6.5Ω typ - determines voltage drop under load: e.g., −4.35V output at 100mA from +5V input. |
| Conversion Efficiency | 88% typ at 100mA - enables battery-powered operation with minimal thermal impact in SO-8 package. |
| Operating Current | 120µA typ at 10kHz - ultra-low quiescent draw extends runtime in always-on instrumentation. |
| Voltage Inversion/Doubling | Configurable via LV pin - no external components needed to switch between −VIN and +2×VIN modes. |
Pinout & Package
MAX660CSA+TG068 is housed in an 8-pin SO (Small Outline) package per JEDEC MS-012, 150-mil body width, with gull-wing leads and standard SO-8 footprint (5.0mm × 4.0mm × 1.75mm height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CAP+ | Charge-pump capacitor positive terminal | Connects to positive plate of flying capacitor C1; carries bidirectional high-current switching pulses. |
| 2 - GND | Power-supply ground reference | System ground return for internal logic and charge-pump switches; must be low-impedance. |
| 3 - CAP− | Charge-pump capacitor negative terminal | Connects to negative plate of flying capacitor C1; phase-complementary to CAP+ node. |
| 4 - V+ | Positive supply input | Accepts +1.5V to +5.5V; powers internal oscillator, logic, and switch drivers. |
| 5 - OSC | Oscillator control input | Internal 15pF node; accepts external capacitor for frequency tuning or external CMOS clock (≤V+ swing). |
| 6 - LV | Low-voltage mode select | Tie to GND for <3V input (bypasses regulator); leave open or tie to GND for ≥3V; tie to OUT for doubling mode. |
| 7 - OUT | Negative or doubled voltage output | Delivers inverted (−VIN) or doubled (+2×VIN) voltage; output impedance dominates load regulation. |
| 8 - FC | Frequency control input | FC = open → 10kHz osc; FC = V+ → 80kHz osc; no effect when OSC is externally driven. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting or doubling mode | Single IC supports both −VIN and +2×VIN outputs via LV pin configuration - eliminates need for separate inverter/doubler parts. |
| Selectable oscillator frequency | 10kHz/80kHz via FC pin - enables optimization of capacitor size (smaller C1/C2 at 80kHz) versus quiescent current (120µA vs 1mA). |
| Low output impedance | 6.5Ω typical - ensures ≤0.65V output drop at 100mA, enabling stable rail generation for precision analog stages. |
| Pin-compatible upgrade | Direct replacement for ICL7660 with higher output current (100mA vs 20mA) and lower quiescent current (120µA vs 170µA). |
| No inductor required | Capacitive charge-pump architecture eliminates magnetic components - reduces EMI, board area, and BOM cost vs. inductive DC-DC converters. |
Applications
| Laptop Computers | Medical Instruments |
|---|---|
Use Scenario: Generating negative bias for LCD contrast control and op-amp dual supplies in space-constrained clamshell designs. IC Role / Device Role / Timing Role: Voltage inverter providing −5V rail from main 5V system bus, configured with LV = GND and FC = open. Use Value: Eliminates discrete inductor-based inverters, reducing PCB area by >40% and enabling thinner hinge mechanisms. |
Use Scenario: Powering isolated analog front-ends in portable ECG and pulse oximeter units operating from single 3.7V Li-ion cells. IC Role / Device Role / Timing Role: Low-quiescent inverter delivering −3.3V for ADC reference buffers and sensor signal conditioning. Use Value: 120µA operating current extends battery life to >12 hours at 40mA total system load. |
| Interface Power Supplies | Operational-Amplifier Power Supplies |
Use Scenario: Providing ±5V rails for RS-232 transceivers and level-shifting circuits in industrial gateways with 3.3V microcontrollers. IC Role / Device Role / Timing Role: Dual-mode converter: inverter for −5V, doubler for +10V - both derived from same 5V input via LV reconfiguration. Use Value: Single-part solution replaces two discrete regulators, cutting BOM count and qualification effort. |
Use Scenario: Supplying split rails to rail-to-rail op-amps in handheld test equipment requiring low-noise, low-drift performance. IC Role / Device Role / Timing Role: Precision inverter generating −4.5V from +4.5V supply, using 150µF low-ESR aluminum electrolytics to limit ripple to <100mVpp. Use Value: 6.5Ω output impedance ensures <1% gain error across full 0–100mA load range in transimpedance amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter/doubler applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX860ESA+ | 50mA max output current; 12Ω typical output impedance; supports same 1.5–5.5V input range and FC-selectable 6/50/130kHz frequencies. | Lower output current and higher impedance limit use to light loads (<30mA) and less demanding regulation requirements. | Select MAX860ESA+ only when 50mA output suffices and smaller µMAX-8 package is preferred over SO-8. |
| ICL7660SA+T | 20mA max output; 55Ω typical output impedance; 170µA quiescent current; identical pinout but lower drive capability and efficiency. | Not suitable for >20mA loads or applications requiring <1V output droop; legacy part with limited availability and no 80kHz option. | Choose ICL7660SA+T only for drop-in replacement in existing designs where load current remains ≤15mA and efficiency is non-critical. |
Compared with MAX860ESA+ and ICL7660SA+T, MAX660CSA+TG068 delivers 2× the output current of MAX860 and 5× that of ICL7660, with 85% lower output impedance than ICL7660 - making it the only choice for 100mA inverter/doubler applications requiring tight voltage regulation and low ripple in SO-8 form factor.
Availability
MAX660CSA+TG068 is available at Aetrix Electronics and suitable for medical instrumentation, handheld test equipment, and interface power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX660CSA+TG068 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications systems.
The MAX660CSA+TG068 belongs to Maxim's charge-pump voltage converter product line, designed specifically to replace inductive DC-DC inverters and doublers in space- and noise-sensitive applications where inductors are impractical.
FAQ
What is the maximum continuous output current of the MAX660CSA+TG068?
The MAX660CSA+TG068 delivers 100mA continuous output current into resistive loads when operating in inverting mode with V+ = 5V, C1 = C2 = 150µF, and FC = V+ (80kHz oscillator). At 10kHz operation, output current remains 100mA but efficiency drops slightly; derating is required above +70°C ambient due to SO-8 package power dissipation limits (471mW at TA = +70°C).
Can the MAX660CSA+TG068 generate both inverted and doubled voltages on the same board?
Yes - the MAX660CSA+TG068 supports both modes via the LV pin: tie LV to GND for inversion (−VIN), or tie LV to OUT for doubling (+2×VIN). However, both modes cannot operate simultaneously on a single MAX660CSA+TG068; separate instances or reconfiguration via external switching are required for dual-output systems.
What capacitor values and types are recommended for low-ripple operation with the MAX660CSA+TG068?
For ≤100mVpp ripple at 100mA load, use C1 = C2 = 150µF aluminum electrolytic capacitors with ≤0.2Ω ESR (e.g., Sanyo MV-GX series). Ceramic capacitors are unsuitable due to microphonic effects and insufficient capacitance; tantalum types require careful ESR verification. Larger C2 values (e.g., 390µF) reduce ripple further but offer diminishing returns beyond 100µF due to the 6.5Ω output impedance limit.
Is the MAX660CSA+TG068 pin-compatible with the ICL7660?
Yes - the MAX660CSA+TG068 is explicitly designed as a pin-compatible, higher-performance upgrade to the ICL7660, sharing identical SO-8 pinout, voltage ranges, and basic functionality. Key improvements include 5× higher output current (100mA vs 20mA), 40% lower output impedance (6.5Ω vs 12Ω), and selectable 80kHz oscillator mode for reduced capacitor size.
How does oscillator frequency selection affect efficiency and thermal performance of the MAX660CSA+TG068?
At 10kHz (FC open), MAX660CSA+TG068 draws 120µA quiescent current and achieves peak efficiency (~92%) near 20mA load; at 80kHz (FC = V+), quiescent current rises to ~1mA but efficiency remains >85% up to 100mA. Higher frequency reduces thermal stress at high loads due to lower effective output resistance contribution from capacitor ESR, though total die dissipation increases slightly.
MAX660CSA+TG068 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Applications:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX660CSA+TG068 FAQ
1.How can I place an order for MAX660CSA+TG068 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX660CSA+TG068 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 MAX660CSA+TG068 reliable?
The price and inventory of MAX660CSA+TG068 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX660CSA+TG068 is usually 5 days.
3.What payment methods are accepted for MAX660CSA+TG068?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX660CSA+TG068 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX660CSA+TG068?
MAX660CSA+TG068 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX660CSA+TG068 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 MAX660CSA+TG068?
For technical support, including MAX660CSA+TG068 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX660CSA+TG068 requirements.
6.How does Aetrix verify that MAX660CSA+TG068 is sourced from the original manufacturer or authorized distributors?
All MAX660CSA+TG068 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 MAX660CSA+TG068 meets industry standards.
7.What is the process for return or replacement of MAX660CSA+TG068?
All MAX660CSA+TG068 units undergo pre-shipment inspection (PSI). If there is an issue with MAX660CSA+TG068, 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 MAX660CSA+TG068 part is unused and in its original packaging.
Return procedure for MAX660CSA+TG068:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX660CSA+TG068 Tags
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MCP2120T-I/SL
Microchip Technology
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LICAL-ENC-MS001
TE Connectivity Linx
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TW9990AT-NA1-GR
Renesas Electronics Corporation
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TVP5151IPBSR
Texas Instruments
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TVP5150AM1IPBSR
Texas Instruments
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LICAL-DEC-MS001-T
TE Connectivity Linx
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ADV7391BCPZ
Analog Devices Inc.
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ADV7393BCPZ-REEL
Analog Devices Inc.
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ADV7393BCPZ
Analog Devices Inc.
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ADV7391WBCPZ
Analog Devices Inc.
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ADV7181DBCPZ
Analog Devices Inc.
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ADV7181CBSTZ-REEL
Analog Devices Inc.
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