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Renesas ICL7660SIBAZT
- Part No.:
- ICL7660SIBAZT
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660SIBAZT.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,212
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Product details
Overview
ICL7660SIBAZT from Renesas Electronics 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 Boost pin (Pin 1) enabling oscillator frequency up to 35kHz, 96% minimum power efficiency, and industrial-grade -40°C to +85°C operation - used in RS-232 power supplies and data acquisition systems requiring compact bipolar rails.
For engineers reviewing the ICL7660SIBAZT datasheet, ICL7660SIBAZT pinout, ICL7660SIBAZT application, or ICL7660SIBAZT equivalent, key selection criteria include its guaranteed 120Ω max output source resistance at 20mA over full temperature range, LV pin bypass capability for low-voltage operation down to 1.5V, and compatibility with 0.1µF pump capacitors when Boost mode is enabled.
Technical Context
The ICL7660SIBAZT integrates an internal RC oscillator (10kHz nominal at 5V), 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 substrate bias logic network actively senses VOUT to dynamically adjust S3/S4 substrates, preventing latch-up during startup or short-circuit conditions.
Operation supports multiple topologies: standalone inverting converter (VOUT ≈ –VIN), voltage doubler (up to 22.8V from 12V input), cascaded multiplication, and supply splitting. The LV pin must be tied to GND below 3.5V for regulator bypass, and left floating above 3.5V to maintain latch-up immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V–12V input; enables ±5V generation from single 5V rail without inductors |
| Oscillator Frequency | 10kHz typical (free-running), up to 35kHz with Boost pin high; directly lowers output impedance |
| Output Source Resistance | ≤120Ω at 20mA, -40°C to +85°C; defines worst-case load regulation and ripple under dynamic current |
| Power Efficiency | ≥96% at 5kΩ load; minimizes thermal rise in space-constrained PCB layouts |
| Voltage Conversion Efficiency | ≥99% open-circuit; ensures near-ideal inversion with negligible quiescent loss |
| Supply Current | ≤180µA over -40°C to +85°C; supports ultra-low-power instrumentation sleep modes |
| Operating Temperature | -40°C to +85°C; qualified for industrial control and automotive body electronics |
Pinout & Package
ICL7660SIBAZT is housed in an 8-lead SOIC package (M8.15 drawing), RoHS-compliant and Pb-free, with standard 1.27mm lead pitch and JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator boost control | Connecting to V+ triples oscillator frequency, reducing output impedance and enabling smaller pump capacitors |
| 2 (CAP+) | Charge pump capacitor connection | Anode of primary flying capacitor; polarity-sensitive with polarized electrolytics |
| 3 (GND) | Ground reference | Common return for regulator, oscillator, and switch logic; must be low-impedance |
| 4 (CAP-) | Reservoir capacitor connection | Cathode of output reservoir capacitor; ties to VOUT through internal switches |
| 5 (VOUT) | Negative output terminal | Delivers inverted voltage; must not exceed GND potential to avoid latch-up |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency or external clock (via 1kΩ series resistor) |
| 7 (LV) | Low-voltage regulator bypass | Must be grounded for 1.5V–3.5V operation; left floating for >3.5V to prevent latch-up |
| 8 (V+) | Positive input supply | Primary power input; absolute max 13V; requires local 2.2µF decoupling if source impedance >25Ω |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin operation | Enables 35kHz switching without external clock, cutting output impedance by ~60% versus free-running mode |
| LV pin regulator bypass | Extends functional operation down to 1.5V input while maintaining latch-up immunity at low voltage |
| Guaranteed 96% power efficiency | Reduces heat dissipation in sealed enclosures and battery-powered portable instruments |
| 100% tested at 3V | Ensures reliable startup and regulation across entire low-voltage operating range |
| Pb-free SOIC packaging | Complies with RoHS and IPC/JEDEC J-STD-020 reflow profiles for automated assembly |
Applications
| RS-232 Power Supply | Negative Rail for Data Acquisition |
|---|---|
Use Scenario: Generating ±12V from a single 5V microcontroller supply to drive legacy RS-232 transceivers. IC Role / Device Role / Timing Role: Inverting charge-pump converter providing isolated negative rail with no magnetic components. Use Value: Eliminates need for discrete transformer-based DC/DC or inductor-based switching regulators, reducing BOM count and EMI. | Use Scenario: Supplying clean -5V bias to precision op-amps and ADC reference buffers in portable test equipment. IC Role / Device Role / Timing Role: Low-noise negative voltage source with <120Ω output impedance ensuring stable analog front-end operation. Use Value: Maintains PSRR and offset stability under varying load currents up to 20mA without external regulation. |
| Supply Splitter for Bipolar Op-Amps | Low-Voltage Instrumentation Bias |
Use Scenario: Converting a 9V battery into ±4.5V rails for rail-to-rail op-amp signal conditioning circuits. IC Role / Device Role / Timing Role: Symmetrical voltage splitter using bidirectional switch architecture to share load between rails. Use Value: Achieves balanced loading and <250Ω combined output resistance without matched external components. | Use Scenario: Providing -2.5V reference for 3.3V-domain SAR ADCs in medical sensor nodes powered from 3V coin cells. IC Role / Device Role / Timing Role: Ultra-low-quiescent inverter operating at 1.5V input with LV pin grounded. Use Value: Enables full functionality at minimum system voltage, extending battery life via sub-180µA supply current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CSA+ | Higher 200µA max supply current; no LV pin; fixed 10kHz oscillator; requires external diode for latch-up protection | Limited to 0°C to +70°C; lacks low-voltage bypass capability below 3.5V | Select when cost sensitivity outweighs industrial temp range and low-voltage flexibility |
| TC7660COA | 100% pin-compatible; 120µA max supply current; same Boost/LV functionality; RoHS-compliant SOIC-8 | Commercial temp range only (0°C to +70°C); identical electrical behavior but narrower qualification | Choose for drop-in replacement where industrial temperature is not required |
Compared with MAX1044CSA+, ICL7660SIBAZT delivers lower quiescent current and integrated latch-up protection; compared with TC7660COA, it extends operational reliability to -40°C to +85°C while retaining identical pinout and Boost/LV control.
Availability
ICL7660SIBAZT is available at Aetrix Electronics and suitable for RS-232 interfaces, portable data acquisition systems, and bipolar op-amp power supplies requiring stable component supply across industrial temperature ranges.
Supply support for ICL7660SIBAZT 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 IoT applications.
The ICL7660SIBAZT belongs to Renesas' legacy Super Voltage Converter product line, designed specifically for compact, inductorless DC/DC voltage inversion in space- and cost-constrained instrumentation and interface circuits.
FAQ
What is the maximum input voltage rating for the ICL7660SIBAZT?
The ICL7660SIBAZT has an absolute maximum supply voltage of +13.0V. Continuous operation is specified up to +12V across the full industrial temperature range (-40°C to +85°C). Exceeding 13V risks permanent damage due to internal junction breakdown or destructive latch-up, as confirmed in the Absolute Maximum Ratings table on page 3 of FN3179 Rev 7.01. The ICL7660SIBAZT must never be operated at or near this limit for extended periods.
Can the ICL7660SIBAZT generate positive voltage doubling?
Yes, the ICL7660SIBAZT can be configured as a positive voltage doubler per Figure 18 in the datasheet, delivering up to 22.8V from a 12V input. This requires external diodes D1 and D2 and separate pump/reservoir capacitors. The ICL7660SIBAZT's internal switches enable this topology without modification, though output source impedance rises to ~60Ω at 10mA load versus ~120Ω in inverting mode.
How does the LV pin affect ICL7660SIBAZT operation below 3.5V?
The LV pin must be tied to GND for ICL7660SIBAZT operation with input voltages from 1.5V to 3.5V. This bypasses the internal series regulator, reducing dropout and enabling reliable startup and regulation at low voltage. Leaving LV floating below 3.5V causes excessive regulator dropout and failure to invert; applying GND above 3.5V induces latch-up. This behavior is explicitly defined in the Detailed Description section (page 8).
Is an external Schottky diode required for ICL7660SIBAZT reliability?
An external Schottky diode from VOUT to CAP- is required only when the input voltage exceeds 5V and its rise rate exceeds 2V/µs, as stated in the Do's and Don'ts section (page 8). This prevents forward-biasing Q4's body diode during fast transients, which could trigger latch-up. For 5V or slower-rising supplies, the ICL7660SIBAZT operates reliably without external diodes across its full temperature range.
What is the guaranteed output source resistance of the ICL7660SIBAZT at 20mA load?
The ICL7660SIBAZT guarantees ≤120Ω output source resistance at 20mA load across the full industrial temperature range (-40°C to +85°C), as specified in the Electrical Specifications table (page 3). This value includes worst-case variation across process, voltage, and temperature - critical for predicting load regulation error and output ripple in precision analog designs using the ICL7660SIBAZT.
ICL7660SIBAZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660SIBAZT FAQ
1.How can I place an order for ICL7660SIBAZT through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SIBAZT 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 ICL7660SIBAZT reliable?
The price and inventory of ICL7660SIBAZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SIBAZT is usually 5 days.
3.What payment methods are accepted for ICL7660SIBAZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SIBAZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SIBAZT?
ICL7660SIBAZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SIBAZT 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 ICL7660SIBAZT?
For technical support, including ICL7660SIBAZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SIBAZT requirements.
6.How does Aetrix verify that ICL7660SIBAZT is sourced from the original manufacturer or authorized distributors?
All ICL7660SIBAZT 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 ICL7660SIBAZT meets industry standards.
7.What is the process for return or replacement of ICL7660SIBAZT?
All ICL7660SIBAZT units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SIBAZT, 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 ICL7660SIBAZT part is unused and in its original packaging.
Return procedure for ICL7660SIBAZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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