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Renesas ICL7660ACPA
- Part No.:
- ICL7660ACPA
- Manufacturer:
- Renesas
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7660ACPA.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,229
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Product details
Overview
ICL7660ACPA from Intersil (now Renesas) is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative supply conversion across 1.5V–12V input, delivering complementary -1.5V to -12V output with only two external capacitors. It features a 10kHz nominal oscillator, BOOST pin for frequency scaling up to ~35kHz, and 96% minimum power efficiency at 5kΩ load. Used in RS-232 power supplies and data acquisition systems requiring compact ±5V generation.
For engineers reviewing the ICL7660ACPA datasheet, ICL7660ACPA pinout, ICL7660ACPA application, or ICL7660ACPA equivalent, this page delivers verified specifications, validated 8-pin PDIP package mapping, confirmed temperature range (0°C to +70°C), real-world output impedance behavior (≤120Ω at 20mA), and two rigorously cross-checked alternative parts - all directly traceable to FN3179 Rev 7.01.
Technical Context
The ICL7660ACPA integrates an internal series regulator, RC oscillator, voltage level translator, and four MOS power switches (one P-channel, three N-channel) to implement a switched-capacitor negative voltage converter. Its substrate bias logic network actively prevents SCR latchup by dynamically adjusting switch substrates based on VOUT sensing - critical for reliable operation under start-up and short-circuit conditions.
Operation supports multiple topologies: basic inverting converter (VOUT ≈ –VIN), voltage doubler (up to 22.8V from 12V input), cascaded multiplication, and supply splitting. The LV pin enables low-voltage optimization (tie to GND ≤3.5V); above 3.5V, it must float to avoid latchup. Oscillator frequency is adjustable via BOOST pin (V+ or GND), external capacitor on OSC pin, or overdrive clock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V–12V input; enables single-supply ±5V generation from standard logic rails without external regulators. |
| Oscillator Frequency | 10kHz typical (5–35kHz adjustable); higher frequencies reduce output impedance and allow smaller pump capacitors. |
| Output Source Resistance | ≤120Ω at 20mA, 0°C to +70°C; defines maximum load regulation error and ripple under dynamic current draw. |
| Power Efficiency | ≥96% at 5kΩ load; minimizes heat rise and extends battery life in portable instrumentation. |
| Voltage Conversion Efficiency | ≥99% open-circuit; ensures near-ideal inversion with negligible quiescent loss when unloaded. |
| Supply Current | ≤180µA max at 0°C to +70°C; supports ultra-low-power operation in always-on sensor interfaces. |
| Operating Temperature | 0°C to +70°C commercial range; validated for industrial control panels and embedded peripherals. |
Pinout & Package
ICL7660ACPA is housed in an 8-lead plastic dual in-line package (PDIP), per JEDEC MS-001, with lead spacing of 0.300 inch and body width of 0.355 inch (E8.3 drawing). Pin 1 is BOOST; pin 3 is GND; pin 5 is VOUT; pin 8 is V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Connect to V+ to raise fOSC ~3.5× (to ~35kHz), lowering output impedance and enabling use of 0.1µF capacitors instead of 10µF. |
| 2 (CAP+) | Charge pump capacitor connection | Anode of pump capacitor C1; internal switching node between S1/S2 and S3/S4 during charge-transfer cycles. |
| 3 (GND) | Reference ground terminal | System return path for internal regulator, oscillator, and logic; must be low-impedance to prevent noise coupling into VOUT. |
| 4 (CAP−) | Charge reservoir capacitor connection | Cathode of reservoir capacitor C2; forms negative output rail; requires Schottky diode to VOUT if V+ > 5.5V to prevent Q4 body-diode forward bias. |
| 5 (VOUT) | Negative output voltage terminal | Delivers inverted supply (–VIN); output impedance depends on fOSC, C1/C2 values, ESR, and temperature. |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower fOSC (e.g., 100pF → 1kHz); also accepts external TTL/CMOS clock via 1kΩ series resistor. |
| 7 (LV) | Low-voltage mode enable | Tie to GND for V+ ≤ 3.5V to bypass internal regulator and improve efficiency; leave floating for V+ > 3.5V to prevent latchup. |
| 8 (V+) | Positive input supply | Primary power input; feeds internal regulator, oscillator, and switch drivers; must not exceed +13V absolute max. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) | Enables 3.5× oscillator frequency increase without external components, reducing output impedance by ~60% and permitting 0.1µF ceramic capacitors. |
| LV pin logic | Hardware-selectable low-voltage mode: GND tie disables internal regulator for <3.5V operation, improving efficiency and startup reliability. |
| SCR latchup protection | Active substrate bias control circuitry senses VOUT and adjusts switch substrates in real time, eliminating need for external diodes across full temp/voltage range. |
| Wide input range | 1.5V–12V operation allows direct use with Li-ion, alkaline, and logic supplies - no pre-regulation required for most embedded applications. |
| 99% open-circuit conversion efficiency | Minimizes idle power loss in battery-powered systems where VOUT is lightly loaded or intermittently active. |
Applications
| RS-232 Power Supply | Negative Supply for Data Acquisition |
|---|---|
Use Scenario: Generating ±12V or ±5V from a single +5V microcontroller supply to drive RS-232 transceivers (e.g., MAX232 replacement). IC Role / Device Role / Timing Role: Charge-pump inverter providing isolated negative rail; operates at fixed 10kHz or boosted 35kHz for low-noise line driver biasing. Use Value: Eliminates need for external inductors or transformers; achieves <120Ω output impedance at 20mA, ensuring stable driver output swing under load. |
Use Scenario: Providing clean –5V reference for precision ADCs, op-amp dual supplies, or analog front-ends in portable test equipment. IC Role / Device Role / Timing Role: Low-noise negative voltage source; LV pin tied to GND for 3.3V input operation; BOOST disabled to minimize EMI near sensitive analog sections. Use Value: 99% open-circuit efficiency preserves battery runtime; 1.5V min input enables operation down to single-cell alkaline discharge. |
| Supply Splitter (±VS) | Voltage Multiplier (n×VIN) |
Use Scenario: Deriving symmetrical ±7.5V rails from a +15V industrial bus to power op-amps in signal conditioning modules. IC Role / Device Role / Timing Role: Bidirectional charge-pump configured as supply splitter; uses shared CAP+ and CAP− nodes with high-value electrolytics (50µF) for low ripple. Use Value: Output impedance reduced by parallel switching action; enables >20mA total load with <250Ω combined series resistance. |
Use Scenario: Cascading two ICL7660ACPA units to generate –10V from +5V for legacy op-amp biasing in audio preamplifiers. IC Role / Device Role / Timing Role: First-stage inverter outputs –5V to second-stage V+, doubling inversion depth; BOOST pins enabled for lowest possible stage impedance. Use Value: Cascaded efficiency remains >92% per stage; predictable –10V output with ≤200Ω total source resistance at 5mA load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCPAZ | Same pinout and function, but rated for 0°C to +70°C with Pb-free SOIC-8 packaging; 100% tested at 3V vs. ICL7660ACPA's 5V characterization baseline. | Preferred for RoHS-compliant surface-mount designs; lacks PDIP through-hole compatibility and thermal mass for high-reliability industrial mounting. | Select ICL7660SCPAZ when board space is constrained and wave-solder assembly is not required. |
| MAX660CPA+ | Pin-compatible 8-pin PDIP; wider –40°C to +85°C rating; 125kHz max oscillator (vs. 35kHz); 110mV typical dropout (vs. no dropout - pure inversion). | Better suited for extended-temperature environments and lower-ripple designs using higher-frequency pumping; requires different capacitor sizing due to 10× fOSC range. | Select MAX660CPA+ when operating below 0°C or above 70°C, or when <50mV output ripple is mandatory. |
Compared with ICL7660ACPA, ICL7660SCPAZ offers identical functionality in a RoHS-compliant SOIC package but sacrifices through-hole mounting and thermal robustness, while MAX660CPA+ provides extended temperature range and higher-frequency operation at the cost of non-dropout inversion behavior and revised capacitor selection rules.
Availability
ICL7660ACPA is available at Aetrix Electronics and suitable for RS-232 interface design, portable data acquisition systems, and analog supply splitting applications requiring stable component supply, long-term obsolescence management, and legacy PDIP footprint compatibility.
Supply support for ICL7660ACPA 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
Intersil (acquired by Renesas Electronics in 2017) is a semiconductor company specializing in high-performance analog and power management ICs for industrial, communications, and computing markets.
The ICL7660A product line was designed specifically to upgrade the legacy ICL7660 with extended voltage range (up to 12V), lower supply current, and enhanced latchup immunity - targeting cost-sensitive, space-constrained embedded systems needing simple bipolar supply generation.
FAQ
What is the maximum input voltage the ICL7660ACPA can handle?
The ICL7660ACPA has an absolute maximum supply voltage rating of +13.0V. Its specified operating range is 1.5V to 12V, with guaranteed performance across 0°C to +70°C. Exceeding 13V risks permanent damage due to internal junction breakdown. For reliable long-term operation, keep V+ ≤12V and ensure transient spikes remain within the absolute max limit.
Can the ICL7660ACPA generate positive voltage doublers?
Yes, the ICL7660ACPA can be wired as a positive voltage doubler, delivering up to 22.8V from a 12V input using external diodes and capacitors (per Figure 18 in FN3179). It does not generate doubled output internally - the topology relies on external components to steer charge. The ICL7660ACPA itself remains a dedicated inverting converter; doubling is an external circuit configuration.
Is an external Schottky diode required for ICL7660ACPA operation?
An external Schottky diode from VOUT (pin 5) to CAP− (pin 4) is required only when V+ exceeds 5.5V and the input voltage rise rate exceeds 2V/µs - to prevent forward-biasing Q4's body diode and triggering latchup. At ≤5.5V or with controlled slew rates, the ICL7660ACPA operates safely without external diodes, as confirmed in FN3179 Section "Do's and Don'ts" #6.
How does the BOOST pin affect ICL7660ACPA performance?
Connecting the BOOST pin (pin 1) to V+ increases the oscillator frequency from ~10kHz to ~35kHz. This reduces output impedance (e.g., from ~120Ω to ~50Ω at 20mA), lowers output ripple, and permits use of smaller pump capacitors (e.g., 0.1µF instead of 10µF). It does not alter conversion ratio or efficiency ceiling - those remain governed by load, capacitor ESR, and temperature.
What is the purpose of the LV pin on the ICL7660ACPA?
On the ICL7660ACPA, the LV pin (pin 7) controls internal regulator bypass. When tied to GND, it disables the series regulator to improve efficiency and startup behavior for inputs ≤3.5V. When left floating, the regulator remains active - essential for V+ > 3.5V to prevent latchup. Misconnecting LV at high voltage causes immediate device failure, per FN3179 "Do's and Don'ts" #2.
ICL7660ACPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ICL7660ACPA FAQ
1.How can I place an order for ICL7660ACPA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660ACPA 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 ICL7660ACPA reliable?
The price and inventory of ICL7660ACPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660ACPA is usually 5 days.
3.What payment methods are accepted for ICL7660ACPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660ACPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660ACPA?
ICL7660ACPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660ACPA 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 ICL7660ACPA?
For technical support, including ICL7660ACPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660ACPA requirements.
6.How does Aetrix verify that ICL7660ACPA is sourced from the original manufacturer or authorized distributors?
All ICL7660ACPA 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 ICL7660ACPA meets industry standards.
7.What is the process for return or replacement of ICL7660ACPA?
All ICL7660ACPA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660ACPA, 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 ICL7660ACPA part is unused and in its original packaging.
Return procedure for ICL7660ACPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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