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Renesas ICL7660SCPAZ
- Part No.:
- ICL7660SCPAZ
- Manufacturer:
- Renesas
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7660SCPAZ.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,050
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Product details
Overview
ICL7660SCPAZ 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 integrates an RC oscillator (10 kHz typ. at 5V), internal regulator, level translator, and four power MOS switches. Used in RS-232 power supplies and data acquisition systems requiring compact ±5V generation.
For engineers reviewing the ICL7660SCPAZ datasheet, ICL7660SCPAZ pinout, ICL7660SCPAZ application, or ICL7660SCPAZ equivalent, key selection criteria include its 99% open-circuit voltage conversion efficiency, BOOST pin-enabled frequency scaling up to ~35 kHz, LV pin for low-voltage operation bypass, and Pb-free 8-lead PDIP package rated for 0°C to +70°C.
Technical Context
The ICL7660SCPAZ implements a switched-capacitor charge-pump topology using four internal MOS switches (one P-channel, three N-channel) controlled by a divide-by-2 counter driven by an on-chip RC oscillator. Its substrate bias logic network actively monitors VOUT to prevent latchup during startup and short-circuit conditions.
Operation supports multiple configurations: inverting converter (VOUT ≈ –VIN), voltage doubler (VOUT ≈ +2VIN), cascaded multiplication, and supply splitting. The BOOST pin (Pin 1) increases oscillator drive current to raise fOSC ~3.5×, reducing output impedance without larger capacitors; the LV pin (Pin 6) disables the internal series regulator when tied to GND for inputs ≤3.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports single-supply systems from low-power sensors to industrial logic rails. |
| Output Voltage Range | -1.5V to -12V - provides rail-to-rail inverted supply without inductors or transformers. |
| Oscillator Frequency | 10 kHz typical (5–35 kHz adjustable via BOOST pin or external capacitor) - enables trade-off between ripple, output impedance, and capacitor size. |
| Supply Current | 80 µA typical at +25°C - ultra-low quiescent draw suitable for battery-powered instrumentation. |
| Output Source Resistance | 60 Ω typical at 20 mA, 5V - defines load regulation and voltage droop under dynamic current demand. |
| Power Efficiency | 96% minimum at 5 kΩ load - ensures minimal thermal rise and high energy reuse in portable designs. |
| Voltage Conversion Efficiency | 99% minimum open-circuit - preserves near-ideal charge transfer for precision analog biasing. |
Pinout & Package
ICL7660SCPAZ is housed in an 8-lead plastic dual in-line package (PDIP), RoHS-compliant and Pb-free, with through-hole mounting compatibility per JEDEC MS-001. Pin 1 is BOOST; Pin 6 is LV; Pin 7 is OSC; Pin 8 is V+; Pin 3 is GND; Pin 5 is VOUT; Pins 2 and 4 are CAP+ and CAP-, respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator drive enhancement | When tied to V+, increases oscillator frequency ~3.5× to reduce output impedance and enable smaller external capacitors. |
| 2 (CAP+) | Charge pump capacitor connection | Anode of primary flying capacitor; must use polarized electrolytic with + terminal connected here. |
| 3 (GND) | Reference ground node | Common return for V+, CAP-, and load; critical for latchup prevention and stable oscillation. |
| 4 (CAP-) | Charge reservoir capacitor connection | Cathode of output reservoir capacitor; polarity must match datasheet diagram to avoid reverse bias damage. |
| 5 (VOUT) | Negative output terminal | Delivers inverted voltage; must not exceed GND potential to prevent device latchup. |
| 6 (LV) | Low-voltage mode control | Tie to GND for 1.5V–3.5V operation to bypass internal regulator; leave floating above 3.5V to avoid latchup. |
| 7 (OSC) | Oscillator timing interface | Accepts external capacitor for frequency reduction or TTL/CMOS clock (with 1 kΩ series resistor) for precise synchronization. |
| 8 (V+) | Positive input supply | Primary power input; absolute max 13 V; source impedance >25 Ω may require 2.2 µF bypass to limit dV/dt. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) | Enables 3.5× oscillator frequency increase, lowering output impedance by ~60% and permitting 0.1 µF capacitors instead of 10 µF in space-constrained layouts. |
| LV pin (Pin 6) bypass | Disables internal series regulator below 3.5V, improving efficiency and enabling reliable start-up from 1.5V sources like coin cells. |
| 99% open-circuit voltage conversion efficiency | Minimizes charge loss during idle or light-load conditions, preserving accuracy in high-impedance sensor bias networks. |
| Integrated SCR latchup protection | Active substrate bias control prevents destructive latchup during output short-circuit or fast input ramp events, eliminating need for external Schottky diodes in most cases. |
| Pb-free 8-lead PDIP package | RoHS-compliant through-hole package compatible with wave soldering; not rated for reflow due to thermal mass limitations. |
Applications
| RS-232 Power Supply | Negative Supply for Data Acquisition |
|---|---|
Use Scenario: Generating ±12V from a single +5V microcontroller supply for legacy RS-232 transceivers. IC Role / Device Role / Timing Role: Charge-pump inverter providing isolated negative rail; no timing reference required beyond internal oscillator. Use Value: Eliminates need for external DC/DC converters or transformer-based supplies, reducing BOM count and PCB area by >40%. |
Use Scenario: Biasing op-amp inputs and ADC reference circuits in portable multimeters and sensor nodes. IC Role / Device Role / Timing Role: Precision negative voltage source with <1% regulation error over 0–10 mA load range. Use Value: Enables true bipolar signal conditioning with 99% conversion efficiency, extending battery life in handheld instruments. |
| Logic Supply Splitter | Low-Voltage Instrumentation |
Use Scenario: Converting +5V logic supply into ±5V rails for analog front-end amplifiers in mixed-signal SoC test fixtures. IC Role / Device Role / Timing Role: Dual-rail generator with matched source impedance on both outputs for balanced common-mode rejection. Use Value: Achieves symmetrical ±5V within ±2% tolerance using only two 10 µF electrolytics, simplifying layout and calibration. |
Use Scenario: Providing -1.5V bias for low-noise JFET preamplifiers powered from 1.8V Li-ion cells in medical EEG sensors. IC Role / Device Role / Timing Role: Ultra-low-voltage inverter operating down to 1.5V with LV pin grounded for regulator bypass. Use Value: Delivers stable -1.5V at 2 mA with 80 µA quiescent current, enabling >100-hour runtime on a single cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660ACPAZ | Lower supply current (26 µA typ. at 3V) but reduced max input voltage (10V vs. 12V); same pinout and package. | Better suited for ultra-low-power 3V systems; less margin for 5V/12V industrial rails. | Select ICL7660ACPAZ only when supply current <30 µA is mandatory and input stays ≤10V. |
| MAX1044CPA+ | Higher max switching frequency (100 kHz), wider temp range (-40°C to +85°C), but requires external timing resistor and lacks BOOST pin. | Preferred for wide-temp industrial environments or noise-sensitive apps needing higher fOSC; adds design complexity. | Choose MAX1044CPA+ when temperature range or EMI performance outweighs simplicity and component count. |
Compared with ICL7660ACPAZ and MAX1044CPA+, the ICL7660SCPAZ offers the widest input voltage range (1.5V–12V), integrated BOOST functionality for impedance optimization, and commercial-grade cost-performance balance - making it optimal for general-purpose ±5V generation in consumer and industrial electronics.
Availability
ICL7660SCPAZ is available at Aetrix Electronics and suitable for RS-232 power supplies, data acquisition systems, and logic supply splitters requiring stable component supply across commercial temperature ranges.
Supply support for ICL7660SCPAZ 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 specializing in microcontrollers, analog, and power management solutions, with deep heritage in precision analog ICs and industrial-grade reliability.
The ICL7660S family was designed specifically for low-noise, inductorless voltage inversion in space- and cost-constrained analog systems - targeting instrumentation, communications interfaces, and portable measurement equipment.
FAQ
What is the maximum input voltage rating for the ICL7660SCPAZ?
The ICL7660SCPAZ has an absolute maximum supply voltage of +13.0V, with guaranteed operation up to +12V across its full 0°C to +70°C temperature range. Exceeding 13V risks permanent damage due to internal junction breakdown, and operation above 12V voids parametric guarantees per the FN3179 datasheet Absolute Maximum Ratings table.
Can the ICL7660SCPAZ generate positive voltage doubling?
Yes, the ICL7660SCPAZ can be configured as a positive voltage doubler delivering up to +22.8V from a +12V input using the circuit in Figure 18 of FN3179. This requires external diodes D1 and D2, with output impedance ~60Ω at 10mA and 5V input - confirmed in the Typical Applications section on page 10.
Does the ICL7660SCPAZ require external diodes for latchup protection?
No - the ICL7660SCPAZ incorporates enhanced SCR latchup protection and operates reliably without external diodes across its full voltage and temperature range. An external Schottky diode from VOUT to CAP- is only recommended when input voltage exceeds 5V *and* has a rise rate >2V/µs, per the Do's and Don'ts section on page 8.
How does the BOOST pin affect output impedance in the ICL7660SCPAZ?
Tying the BOOST pin (Pin 1) to V+ increases oscillator frequency ~3.5× (e.g., from 10 kHz to ~35 kHz), which directly reduces output impedance - Figure 11 shows ROUT dropping from ~200Ω to ~100Ω at 10 kHz → 100 kHz with C1=C2=10µF. This allows smaller capacitors while maintaining load regulation.
What is the function of the LV pin on the ICL7660SCPAZ?
The LV pin (Pin 6) bypasses the internal series regulator when tied to GND, enabling stable operation down to 1.5V input - critical for low-voltage battery applications. For inputs >3.5V, LV must remain floating to prevent latchup, as specified in the Detailed Description section on page 8.
ICL7660SCPAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 10kHz ~ 35kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ICL7660SCPAZ FAQ
1.How can I place an order for ICL7660SCPAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SCPAZ 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 ICL7660SCPAZ reliable?
The price and inventory of ICL7660SCPAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SCPAZ is usually 5 days.
3.What payment methods are accepted for ICL7660SCPAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SCPAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SCPAZ?
ICL7660SCPAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SCPAZ 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 ICL7660SCPAZ?
For technical support, including ICL7660SCPAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SCPAZ requirements.
6.How does Aetrix verify that ICL7660SCPAZ is sourced from the original manufacturer or authorized distributors?
All ICL7660SCPAZ 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 ICL7660SCPAZ meets industry standards.
7.What is the process for return or replacement of ICL7660SCPAZ?
All ICL7660SCPAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SCPAZ, 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 ICL7660SCPAZ part is unused and in its original packaging.
Return procedure for ICL7660SCPAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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