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Renesas ICL7660ACBAZA
- Part No.:
- ICL7660ACBAZA
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660ACBAZA.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,872
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Product details
Overview
ICL7660ACBAZA from Renesas is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative voltage conversion across 1.5V–12V input, delivering complementary -1.5V to -12V output with only two external capacitors. It features a 10kHz nominal oscillator (boostable to ~35kHz via BOOST pin), <120Ω output source resistance at 20mA, 96% minimum power efficiency, and operates over 0°C to +70°C commercial temperature range in 8-lead SOIC package. It is widely used in RS-232 power supplies and data acquisition systems requiring dual-rail ±5V generation.
For engineers reviewing the ICL7660ACBAZA datasheet, ICL7660ACBAZA pinout, ICL7660ACBAZA application, or ICL7660ACBAZA equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal and efficiency behavior at 5V/25°C, exact SOIC-8 package mapping, and two rigorously cross-checked alternative parts for supply-voltage-conversion designs.
Technical Context
The ICL7660ACBAZA integrates an internal RC oscillator, voltage level translator, series DC regulator, and four MOS power switches (one P-channel, three N-channel) to implement a switched-capacitor negative voltage converter. Its BOOST pin (Pin 1) enables oscillator frequency scaling up to ~35kHz, directly reducing output impedance without larger capacitors.
Operation requires no external diode under full temperature/voltage range; the LV pin must be tied to GND for inputs ≤3.5V to bypass the internal regulator and avoid latchup, while left floating for 3.5V–12V operation. Output voltage accuracy and ripple depend on C1/C2 values, ESR, and oscillator frequency per Equation 4 and Equation 5 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 12V input - supports direct +5V logic-to-±5V conversion and wide-battery applications. |
| Oscillator Frequency | 10kHz nominal (5–35kHz adjustable) - determines charge-pump switching rate and impacts output impedance and ripple. |
| Output Source Resistance | ≤120Ω at 20mA, 0°C to +70°C - defines voltage droop under load; lower values enable higher current delivery. |
| Power Efficiency | ≥96% at RL = 5kΩ - minimizes wasted power in low-quiescent-current portable systems. |
| Voltage Conversion Efficiency | ≥99% open-circuit - ensures near-ideal VOUT ≈ –VIN under light loads, critical for precision analog rails. |
| Supply Current | ≤125µA at 3V, 0°C to +70°C - enables ultra-low-power operation in always-on instrumentation subsystems. |
| Operating Temperature | 0°C to +70°C - commercial-grade rating suitable for industrial control panels and embedded peripherals. |
Pinout & Package
ICL7660ACBAZA is housed in an 8-lead Pb-free SOIC (Small Outline Integrated Circuit) package, compliant with RoHS and JEDEC MS-012 (M8.15) outline, with 1.27mm lead pitch and 5.0mm × 6.2mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency boost control | Connecting to V+ raises oscillator frequency ~3.5×, lowering output impedance for compact capacitor designs. |
| 2 (CAP+) | Charge pump capacitor connection | Node where external pump capacitor (C1) connects; carries full switching current during charge transfer cycles. |
| 3 (GND) | Ground reference | Primary return path for internal regulator, oscillator, and switch logic; must be low-impedance for stable operation. |
| 4 (CAP−) | Charge reservoir capacitor connection | Node where external reservoir capacitor (C2) connects; sets output voltage stability and ripple performance. |
| 5 (VOUT) | Negative output terminal | Delivers regulated –VIN output; must not exceed GND potential to prevent latchup (per Do's and Don'ts §7). |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency or external clock (via 1kΩ series resistor) for precise synchronization. |
| 7 (LV) | Low-voltage mode enable | Tie to GND for 1.5V–3.5V operation to bypass internal regulator; leave floating for 3.5V–12V to prevent latchup. |
| 8 (V+) | Positive input supply | Primary power input; feeds internal regulator, oscillator, and switch drivers; rise rate >2V/µs may require input decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Boost Pin (Pin 1) | Enables 3.5× oscillator frequency increase without external clock, reducing output impedance by ~60% for same capacitor values. |
| No External Diode Required | Eliminates BOM cost and board space for Schottky diode in most configurations, simplifying layout and improving reliability. |
| LV Pin Control Logic | Hardware-selectable low-voltage mode ensures latchup-free start-up and operation across full 1.5V–12V input range. |
| 99% Open-Circuit Conversion Efficiency | Minimizes voltage error at light loads-critical for high-impedance sensor biasing and reference splitting applications. |
| Pb-Free SOIC-8 Package | RoHS-compliant M8.15 outline supports wave-solder and reflow processes, with 160°C/W θJA for thermal design margin. |
Applications
| RS-232 Power Supply | Negative Rail for Data Acquisition |
|---|---|
Use Scenario: Generating –5V to –12V from a single +5V microcontroller supply for legacy RS-232 transceivers (e.g., MAX232 replacement). IC Role / Device Role / Timing Role: Charge-pump voltage inverter providing isolated negative rail; no timing interface required-self-oscillating. Use Value: Eliminates need for external inductor or transformer, enabling compact, low-noise, low-cost serial interface power. |
Use Scenario: Providing clean –5V bias for op-amp input stages and ADC reference buffers in portable test equipment. IC Role / Device Role / Timing Role: Precision negative voltage source with <120Ω output impedance and 99% open-circuit efficiency. Use Value: Maintains analog signal integrity under varying load conditions, minimizing offset drift and common-mode error. |
| Supply Splitter for ±5V Systems | Low-Power Instrumentation Bias |
Use Scenario: Deriving symmetric ±5V rails from a single +5V USB or battery source in handheld multimeters and signal generators. IC Role / Device Role / Timing Role: Bidirectional voltage converter operating as supply splitter (VOUT = ±VS); uses internal switch topology to share load. Use Value: Achieves balanced rail symmetry with <250Ω combined output resistance-enabling rail-to-rail op-amp operation. |
Use Scenario: Biasing photodiode transimpedance amplifiers and low-noise JFET front-ends in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current (≤125µA) negative supply generator supporting multi-year battery life. Use Value: Delivers stable –2.5V or –3.3V at µA-level loads with negligible self-heating, preserving measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCBAZ | Same SOIC-8 package, but rated for –40°C to +85°C industrial range; slightly higher max supply current (180µA vs. 125µA at 3V). | Required for extended-temperature environments (e.g., outdoor telemetry, automotive under-hood). | Select ICL7660SCBAZ when ambient exceeds +70°C or requires wider temp qualification. |
| MAX660CPA+ | Pin-compatible SOIC-8; higher 80kHz oscillator (fixed), lower 35Ω typical ROUT at 20mA, but requires external timing capacitor. | Better suited for high-current, low-impedance loads (>25mA) where ripple and regulation are critical. | Choose MAX660CPA+ when output impedance <50Ω or switching noise immunity is prioritized over quiescent current. |
Compared with ICL7660ACBAZA, ICL7660SCBAZ extends temperature capability at modest quiescent cost, while MAX660CPA+ trades higher supply current for significantly lower output impedance and fixed high-frequency operation-making each optimal for distinct thermal, efficiency, and load-impedance requirements.
Availability
ICL7660ACBAZA is available at Aetrix Electronics and suitable for RS-232 power supplies, data acquisition system biasing, and ±5V supply splitting requiring stable component supply, RoHS compliance, and commercial-temperature reliability.
Supply support for ICL7660ACBAZA 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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and connectivity solutions for industrial, automotive, and infrastructure markets.
The ICL7660A product line was designed specifically for low-power, capacitor-based DC-DC voltage inversion in space- and cost-constrained embedded systems-emphasizing simplicity, reliability, and wide-input-voltage operation without inductors.
FAQ
What is the maximum input voltage the ICL7660ACBAZA can handle?
The ICL7660ACBAZA has an absolute maximum supply voltage of +13.0V, but its specified operating range is 1.5V to 12V. Operation above 12V risks exceeding guaranteed performance limits and may compromise long-term reliability. The device is characterized and tested up to 12V across its full 0°C to +70°C temperature range, with output source resistance and efficiency validated at 12V in the Electrical Specifications table on page 3 of FN3179 Rev 7.01.
Does the ICL7660ACBAZA require an external diode for latchup protection?
No-the ICL7660ACBAZA does not require an external Schottky diode for latchup protection under normal operation across its full 1.5V–12V input range and 0°C to +70°C temperature range. This is explicitly stated in Note 11 on page 4 of FN3179 Rev 7.01 and confirmed in the "Do's and Don'ts" section (§6), which specifies the diode is only needed when V+ > 5V *and* input rise rate exceeds 2V/µs. For standard 5V logic-supply applications, the ICL7660ACBAZA operates safely without added diodes.
How does the BOOST pin affect the performance of the ICL7660ACBAZA?
The BOOST pin (Pin 1) on the ICL7660ACBAZA increases oscillator frequency from nominal 10kHz to ~35kHz when tied to V+, directly lowering output source resistance and ripple voltage. As shown in Figure 11 (page 7), this reduces ROUT by ~60% at 10kHz versus free-running mode-enabling use of smaller, cheaper 0.1µF pump capacitors instead of 10µF while maintaining equivalent load capability. This feature is especially valuable in surface-mount, space-constrained designs.
Can the ICL7660ACBAZA be used as a voltage doubler?
Yes-the ICL7660ACBAZA can be configured as a positive voltage doubler generating up to 22.8V from a 12V input, as documented in the "Typical Applications" section (page 10) and Figure 18 of FN3179 Rev 7.01. In this mode, it uses external diodes D1 and D2 with pump/reservoir capacitors to achieve VOUT ≈ 2V+ − 2VF. The output source impedance remains consistent with datasheet specifications (e.g., ~60Ω at 10mA, 5V input), and no internal configuration changes are required.
What is the purpose of the LV pin on the ICL7660ACBAZA?
The LV pin on the ICL7660ACBAZA controls internal regulator bypass: tying it to GND disables the series regulator to improve efficiency and enable stable operation down to 1.5V input, while leaving it floating preserves regulator action for inputs >3.5V to prevent latchup. This dual-mode operation is essential for universal 1.5V–12V compatibility-confirmed in the Absolute Maximum Ratings table (page 3) and Detailed Description (page 8), where improper LV connection (e.g., grounding above 3.5V) is explicitly flagged as a latchup risk.
ICL7660ACBAZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- 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):
- 12V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 45mA
- Frequency - Switching:
- 3kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660ACBAZA FAQ
1.How can I place an order for ICL7660ACBAZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660ACBAZA 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 ICL7660ACBAZA reliable?
The price and inventory of ICL7660ACBAZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660ACBAZA is usually 5 days.
3.What payment methods are accepted for ICL7660ACBAZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660ACBAZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660ACBAZA?
ICL7660ACBAZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660ACBAZA 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 ICL7660ACBAZA?
For technical support, including ICL7660ACBAZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660ACBAZA requirements.
6.How does Aetrix verify that ICL7660ACBAZA is sourced from the original manufacturer or authorized distributors?
All ICL7660ACBAZA 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 ICL7660ACBAZA meets industry standards.
7.What is the process for return or replacement of ICL7660ACBAZA?
All ICL7660ACBAZA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660ACBAZA, 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 ICL7660ACBAZA part is unused and in its original packaging.
Return procedure for ICL7660ACBAZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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