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onsemi MC7660DR2
- Part No.:
- MC7660DR2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC7660DR2.pdf
- Description:
- IC REG CHARGE PUMP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:270,000
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Product details
Overview
MC7660DR2 from onsemi is a charge pump DC-to-DC voltage converter IC that inverts +1.5 V to +10 V input to -1.5 V to -10 V output using only two external capacitors-no inductor required. It features 10 kHz internal oscillator, 99.9% voltage conversion efficiency, 80 µA supply current at 5.0 V input, and operates across -40°C to +85°C in SOIC-8 package. It is commonly used for RS-232 negative bias generation.
For engineers reviewing the MC7660DR2 datasheet, pinout, applications, or equivalent options, key selection considerations include its inverting topology, LV pin logic control for low-voltage operation, oscillator frequency adjustability via external capacitor, output source resistance of 70 Ω (typ.) at 25°C, and compatibility with polarized electrolytic pump/reservoir capacitors.
Technical Context
The MC7660DR2 implements a four-switch MOS charge pump architecture with integrated logic network and voltage-level translators that dynamically bias substrates of S3/S4 switches to prevent latch-up. Its internal voltage regulator is integral to anti-latch-up protection but can be disabled via LV pin grounding for improved low-voltage operation below 3.5 V.
Oscillator frequency is nominally 10 kHz and adjustable downward by connecting COSC (e.g., 100 pF lowers fOSC to 1.0 kHz); upward adjustment requires external TTL/CMOS clocking through a 1 kΩ series resistor. Output impedance is dominated by capacitive reactance of C1 (XC ≈ 3.18 Ω at 10 kHz, 10 µF), yielding ~70 Ω typical dynamic source resistance at 20 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5 V to +10 V - supports single-cell LiFePO₄, multi-cell alkaline, and standard logic rails without external regulation. |
| Output Voltage | -1.5 V to -10 V - precise inversion with ≤2% deviation at 1 mA load; no external feedback required. |
| Oscillator Frequency | 10 kHz (nominal) - fixed internal timing enables predictable ripple and EMI profile; adjustable down to 1 kHz for ultra-low IQ. |
| Supply Current | 80 µA (typ.) at VIN = 5.0 V - enables battery-powered RS-232 transceivers and portable instrumentation. |
| Voltage Conversion Efficiency | 99.9% (typ.) - minimizes energy loss during inversion, critical for low-power negative rail generation. |
| Output Source Resistance | 70 Ω (typ., 25°C, 20 mA) - defines voltage droop under load; parallel devices reduce effective ROUT linearly. |
| ESD Protection | ≥2.5 kV HBM - ensures robustness during board handling and system integration without added protection circuitry. |
Pinout & Package
MC7660DR2 is housed in an 8-pin SOIC (SO-8, D suffix, Case 751-07), with 1.27 mm pitch, body dimensions 4.9 × 3.9 mm, and maximum height 1.75 mm. Pin 1 is NC (no connect); pin 6 (LV) controls regulator enable/disable; pin 7 (OSC) allows oscillator frequency tuning.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Unused internal node; must remain unconnected per datasheet to avoid latch-up risk. |
| 2 (CAP+) | Pump Capacitor Positive Terminal | Drives charging phase of C1; connects to + terminal of polarized electrolytic pump capacitor. |
| 3 (GND) | Ground Reference | System ground return for all internal circuits; serves as reference for VOUT and LV logic level. |
| 4 (CAP-) | Pump Capacitor Negative Terminal | Completes charge-transfer path for C1; connects to – terminal of polarized pump capacitor. |
| 5 (V+) | Positive Input Supply | Primary power input; supplies internal oscillator, logic, and switch drivers; range 1.5–10 V. |
| 6 (LV) | Low-Voltage Mode Control | Ground to disable regulator for VIN ≤ 3.5 V; leave open for VIN > 3.5 V to ensure latch-up immunity. |
| 7 (OSC) | Oscillator Timing Node | Connect external capacitor to GND to lower fOSC; drive externally with 1 kΩ series resistor for higher frequencies. |
| 8 (VOUT) | Negative Output Terminal | Delivers inverted output voltage; connects to + terminal of reservoir capacitor C2 (to GND). |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless Inversion | Eliminates magnetic components, reducing PCB area, cost, and EMI-ideal for space-constrained RS-232 interfaces. |
| Configurable Oscillator | Internal 10 kHz clock adjustable down to 1 kHz via COSC; enables trade-off between efficiency and ripple/noise. |
| LV-Controlled Regulator | LV pin disables internal regulator below 3.5 V, improving conversion efficiency and enabling 1.5 V operation. |
| Self-Protected Substrate Biasing | Integrated logic network dynamically adjusts S3/S4 substrate voltages to prevent latch-up across temperature and load. |
| Polarized Capacitor Support | Validated for use with low-cost 10 µF polarized electrolytics-C1 (+) to CAP+, C2 (+) to GND-simplifying BOM. |
Applications
| RS-232 Transceiver Bias | Portable Display Backlight Supply |
|---|---|
Use Scenario: Generating -5 V rail for MAX232-type RS-232 line drivers in handheld test equipment. IC Role / Device Role / Timing Role: Charge pump inverter providing isolated negative supply; no timing interface-self-clocked at 10 kHz. Use Value: Enables true RS-232 voltage levels from single 5 V supply, eliminating need for dual-output DC/DC or transformer-based solutions. |
Use Scenario: Powering segmented LCD bias in battery-operated medical monitors with 3.3 V main rail. IC Role / Device Role / Timing Role: Negative voltage generator for LCD common electrode; operates at 10 kHz with minimal filtering. Use Value: Delivers stable -3.3 V at <5 mA with <100 mV ripple, extending battery life via 80 µA quiescent current. |
| Data Acquisition System Reference | Industrial Sensor Signal Conditioning |
Use Scenario: Creating symmetric ±5 V analog supply for 16-bit SAR ADC front-end in PLC I/O modules. IC Role / Device Role / Timing Role: Precision inverter supplying clean negative rail; LV pin grounded for optimal low-voltage regulation. Use Value: Achieves 99.9% conversion efficiency and 70 Ω output impedance-minimizing offset drift and gain error in differential amplifiers. |
Use Scenario: Providing -2.5 V bias for op-amp-based current-sense amplifiers in motor drives. IC Role / Device Role / Timing Role: Low-noise negative rail generator; OSC pin left open for nominal 10 kHz switching. Use Value: Maintains <1.5 mV/V line regulation over 1.5–10 V input range, ensuring accurate current measurement across wide supply variance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge pump inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660CPA | Pin-compatible but older BiMOS process; 120 µA IQ (vs. 80 µA), 95% typical efficiency, no LV pin control. | Lacks LV mode-requires external regulator for <3.5 V operation; not qualified for extended temperature range. | Select when legacy design reuse is prioritized over efficiency or wide-temp support. |
| MAX660CPA | Higher 80 kHz oscillator; 160 µA IQ; includes shutdown pin; 92% efficiency; SO-8 package. | Higher-frequency operation reduces capacitor size but increases EMI sensitivity; no LV pin-fixed regulator. | Prefer for compact designs needing smaller 1 µF capacitors, accepting higher IQ and no low-voltage optimization. |
Compared with ICL7660CPA and MAX660CPA, the MC7660DR2 uniquely combines ultra-low quiescent current (80 µA), LV-controlled regulator for 1.5 V operation, and extended -40°C to +85°C qualification-making it optimal for battery-powered industrial and portable instrumentation where efficiency and temperature resilience are critical.
Availability
MC7660DR2 is available at Aetrix Electronics and suitable for RS-232 interface design, portable display biasing, and data acquisition system power rails requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MC7660DR2 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The MC7660DR2 belongs to onsemi's legacy analog power management portfolio, designed specifically for low-power, inductorless DC/DC voltage inversion in space- and cost-constrained systems such as portable instrumentation and industrial interfaces.
FAQ
What is the minimum input voltage supported by the MC7660DR2?
The MC7660DR2 supports a minimum input voltage of +1.5 V, verified across the full -40°C to +85°C operating temperature range with LV pin grounded. At this voltage, it delivers a corresponding -1.5 V output with 97% voltage conversion efficiency and maintains stable oscillation at the nominal 10 kHz frequency, making it suitable for single-cell alkaline or LiFePO₄ battery-powered systems.
How does the LV pin affect MC7660DR2 operation?
The LV pin on the MC7660DR2 controls internal voltage regulator enablement: grounding LV disables the regulator to improve efficiency and enable reliable operation down to 1.5 V input; leaving LV open ensures latch-up immunity for inputs above 3.5 V. This dual-mode capability is unique to the MC7660DR2 and not present in pin-compatible alternatives like the ICL7660CPA.
Can the MC7660DR2 generate positive voltage multiplication?
Yes, the MC7660DR2 can generate positive voltage multiplication (e.g., +10 V from +5 V) using external diodes and capacitors as shown in Figure 9 of the datasheet. Its bidirectional MOS switches allow charge transfer in either direction, enabling both inversion and doubling topologies-though efficiency drops to ~92% in doubling mode due to diode forward voltage losses.
What is the recommended capacitor type and value for MC7660DR2?
The MC7660DR2 is validated for use with 10 µF polarized aluminum electrolytic capacitors: C1 (pump) connected between CAP+ and CAP-, and C2 (reservoir) between VOUT and GND, with C2's + terminal tied to GND. For reduced ripple at light loads, increasing both capacitors proportionally with oscillator frequency reduction (e.g., 100 µF for 1 kHz fOSC) is required per datasheet guidance.
Is the MC7660DR2 RoHS compliant and halogen-free?
Yes, the MC7660DR2 is RoHS compliant and halogen-free per onsemi's product change notification PCN-120701-01, with lead-free matte tin plating and compliant with JEDEC J-STD-020 moisture sensitivity level 1. The SOIC-8 package meets IPC/JEDEC J-STD-020D reflow profiles and is rated for 260°C peak solder temperature.
MC7660DR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC7660DR2 FAQ
1.How can I place an order for MC7660DR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC7660DR2 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 MC7660DR2 reliable?
The price and inventory of MC7660DR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC7660DR2 is usually 5 days.
3.What payment methods are accepted for MC7660DR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC7660DR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC7660DR2?
MC7660DR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC7660DR2 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 MC7660DR2?
For technical support, including MC7660DR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC7660DR2 requirements.
6.How does Aetrix verify that MC7660DR2 is sourced from the original manufacturer or authorized distributors?
All MC7660DR2 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 MC7660DR2 meets industry standards.
7.What is the process for return or replacement of MC7660DR2?
All MC7660DR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC7660DR2, 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 MC7660DR2 part is unused and in its original packaging.
Return procedure for MC7660DR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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