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Renesas ICL7660SCBAZ-T
- Part No.:
- ICL7660SCBAZ-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660SCBAZ-T.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,208
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Product details
Overview
ICL7660SCBAZ-T from Intersil (now Renesas) is a monolithic CMOS charge-pump voltage converter IC that generates regulated negative output voltages from a single positive input supply. It operates across 1.5V–12V input, delivers −1.5V to −12V output, achieves ≥96% power efficiency at 5kΩ load, features a 10kHz nominal oscillator frequency, and includes a BOOST pin (Pin 1) to increase switching frequency for lower output impedance-enabling compact 0.1µF external capacitors in RS-232 or data acquisition power rails.
For engineers reviewing the ICL7660SCBAZ-T datasheet, ICL7660SCBAZ-T pinout, ICL7660SCBAZ-T application, or ICL7660SCBAZ-T equivalent, this page provides verified technical context, exact pin functions, real-world design implications of its LV bypass capability, BOOST-driven impedance reduction, and confirmed alternatives for ±5V generation, voltage doubling, and industrial instrumentation supply splitting.
Technical Context
The ICL7660SCBAZ-T 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 two-phase charge-pump topology. 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 configurations: standard inverting (VOUT = −VIN), voltage doubling (VOUT ≈ +2VIN), cascaded multiplication, and supply splitting (VOUT = ±VS/2). The LV pin enables low-voltage optimization (1.5V–3.5V) when tied to GND, while floating LV ensures latchup immunity above 3.5V-critical for reliable operation across 0°C to +70°C commercial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V: Enables direct use with 1.8V, 3.3V, and 5V logic rails without pre-regulation. |
| Output Voltage | −1.5V to −12V (inverting mode): Matches standard analog/digital bipolar supply requirements like ±5V or ±12V. |
| Oscillator Frequency | 10kHz nominal (5–35kHz adjustable via BOOST pin or external capacitor): Higher frequency reduces required capacitor size and output impedance. |
| Power Efficiency | ≥96% at 5kΩ load: Minimizes thermal rise and input current draw in battery-powered or space-constrained systems. |
| Output Source Resistance | 60Ω typical at 20mA, 5V input: Defines maximum deliverable current before >5% voltage droop; improves with BOOST pin activation. |
| Supply Current | 80µA typical at 25°C, 5V: Enables ultra-low-quiescent operation in always-on sensor interfaces or standby power domains. |
| Temperature Range | 0°C to +70°C: Validated for commercial-grade embedded control, test equipment, and peripheral power management. |
| Package | 8-lead SOIC (M8.15): Surface-mount compatible with standard reflow profiles; Pb-free (RoHS compliant) termination. |
Pinout & Package
ICL7660SCBAZ-T uses an 8-lead SOIC package (JEDEC MS-012AC, drawing M8.15), 3.9mm × 4.9mm body, 1.27mm pitch, with matte tin (e3) RoHS-compliant terminations rated for SnPb and Pb-free soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency boost control | Connecting to V+ triples oscillator frequency (~35kHz), lowering output impedance and enabling smaller external capacitors (e.g., 0.1µF). |
| 2 (CAP+) | Charge pump capacitor connection | Anode of primary pump capacitor C1; carries full switching current; polarity-sensitive with polarized electrolytics. |
| 3 (GND) | Ground reference | System ground return path; also serves as cathode reference for C2 in inverting configuration. |
| 4 (CAP−) | Charge reservoir capacitor connection | Cathode of reservoir capacitor C2; critical for ripple suppression; Schottky diode may be added from VOUT to CAP− for latchup prevention above 5.5V. |
| 5 (VOUT) | Negative output terminal | Delivers inverted voltage; must not exceed GND potential-latchup occurs if pulled above 0V. |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to reduce frequency (e.g., 100pF → 1kHz); can be overdriven by external clock via 1kΩ series resistor. |
| 7 (LV) | Low-voltage mode enable | Tie to GND for 1.5–3.5V operation (bypasses internal regulator); leave floating for 3.5–12V to prevent latchup. |
| 8 (V+) | Positive input supply | Main power input; accepts 1.5–12V; requires local 2.2µF bypass if source impedance >25Ω or dV/dt >2V/µs. |
Key Features
| Feature | Design Value |
|---|---|
| BOOST pin for frequency scaling | Enables 3.5× higher oscillator frequency to cut output impedance by ~50%, supporting 0.1µF capacitors instead of 10µF-reducing board area and BOM cost. |
| LV pin for dual-voltage optimization | Allows seamless transition between low-VIN (1.5–3.5V, LV=GND) and medium/high-VIN (3.5–12V, LV=open) operation without redesign or component change. |
| Guaranteed 96% power efficiency | Ensures minimal wasted energy as heat under 5kΩ load-critical for thermally constrained enclosures and extended battery life in portable instrumentation. |
| Integrated latchup protection | Active substrate bias control eliminates need for external diodes across all temperatures and voltages-simplifying layout and improving reliability in RS-232 or DAC supply rails. |
| Pb-free SOIC packaging | Meets RoHS Directive 2011/65/EU with e3 matte tin finish; qualified for both SnPb and Pb-free reflow per IPC/JEDEC J-STD-020 MSL Level 1. |
Applications
| RS-232 Transceiver Power | Negative Supply for Data Acquisition |
|---|---|
Use Scenario: Generating −5V to −12V bias for RS-232 line drivers/receivers from a single +5V system rail. IC Role / Device Role / Timing Role: Inverting charge-pump converter providing isolated negative rail with no inductors or transformers. Use Value: Eliminates need for discrete DC/DC modules; achieves <100mVpp ripple with 10µF capacitors and maintains stable output under 10mA load variation. | Use Scenario: Supplying clean −5V to precision ADCs, op-amps, and sensor front-ends in industrial data loggers. IC Role / Device Role / Timing Role: Low-noise negative voltage source with <60Ω output impedance, enabling accurate bipolar signal conditioning. Use Value: Delivers 99% open-circuit voltage conversion efficiency-minimizing supply-induced offset drift in 16-bit+ measurement systems. |
| Voltage Doubling for LCD Bias | Supply Splitting in Audio Amplifiers |
Use Scenario: Generating +10V from +5V input to drive LCD segment bias or op-amp rails in portable displays. IC Role / Device Role / Timing Role: Positive voltage doubler using internal switches and external diodes (D1/D2). Use Value: Achieves ~9.4V output (2×5V − 2×VF) at 10mA with <60Ω source impedance-sufficient for low-power LCD controllers without external regulators. | Use Scenario: Converting a single +15V supply into symmetrical ±7.5V rails for Class-AB audio amplifier stages. IC Role / Device Role / Timing Role: Bidirectional supply splitter using shared pump capacitor and balanced load sharing. Use Value: Reduces output impedance by parallel switch conduction-enabling >20mA combined output while maintaining <1% cross-regulation error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CPA+ | Same 8-pin PDIP/SOIC footprint; 1.5–6V input; 10kHz fixed oscillator; no BOOST pin; 100µA typical I+. | Limited to ≤6V input; lacks frequency-scaling capability-requires larger capacitors for equivalent output impedance. | Choose for legacy designs where BOOST functionality is unused and input stays ≤6V. |
| TC7660COA | Pin-compatible SOIC-8; 1.5–10V input; 10kHz oscillator; no BOOST pin; 170µA max I+ at 70°C. | Lower max input voltage (10V vs. 12V); higher supply current degrades efficiency in low-power systems. | Prefer when RoHS compliance and SOIC-8 form factor are required but BOOST and 12V operation are unnecessary. |
Compared with MAX1044CPA+ and TC7660COA, the ICL7660SCBAZ-T offers wider 1.5–12V input support, BOOST-enabled impedance reduction, and lower 80µA typical supply current-making it optimal for modern 5V/12V systems requiring compact, efficient, and flexible bipolar rail generation.
Availability
ICL7660SCBAZ-T is available at Aetrix Electronics and suitable for RS-232 transceiver power, precision data acquisition systems, and LCD bias generation requiring stable component supply across commercial temperature ranges and long production lifecycles.
Supply support for ICL7660SCBAZ-T 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 (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications infrastructure.
The ICL7660S family was designed specifically for high-efficiency, low-component-count DC/DC voltage conversion in space-constrained and cost-sensitive applications-emphasizing robust latchup immunity, wide input range, and flexible configuration without external magnetics.
FAQ
What is the function of the BOOST pin on the ICL7660SCBAZ-T?
The BOOST pin (Pin 1) on the ICL7660SCBAZ-T increases internal oscillator charge/discharge current, raising switching frequency up to ~35kHz when tied to V+. This lowers output impedance and allows use of smaller external capacitors (e.g., 0.1µF instead of 10µF), reducing PCB area and cost in RS-232 or portable instrumentation designs. The ICL7660SCBAZ-T datasheet confirms this behavior across 1.5–12V input.
Can the ICL7660SCBAZ-T generate positive voltage doubling?
Yes, the ICL7660SCBAZ-T supports positive voltage doubling (VOUT ≈ +2VIN) using external diodes D1 and D2 per Figure 18 in the datasheet. With a +5V input, it delivers ~+9.4V output (accounting for diode forward drops) at 10mA with ~60Ω source impedance. This mode leverages the same internal MOS switches used in inverting mode-no additional ICs required. The ICL7660SCBAZ-T is validated for this configuration in the "Typical Applications" section.
How does the LV pin affect ICL7660SCBAZ-T operation below 3.5V input?
When the LV pin is tied to GND, the ICL7660SCBAZ-T bypasses its internal series regulator, enabling stable operation down to 1.5V input-critical for low-voltage microcontroller or sensor systems. At inputs above 3.5V, leaving LV floating prevents latchup by maintaining proper substrate bias. This dual-mode behavior is explicitly specified in the "Detailed Description" and "Do's and Don'ts" sections of the ICL7660SCBAZ-T datasheet.
What is the maximum output current capability of the ICL7660SCBAZ-T?
The ICL7660SCBAZ-T does not specify a hard current limit but defines output performance via source resistance: 60Ω typical at 20mA and 5V input. At 20mA, this yields ~1.2V drop-acceptable for many analog loads. For higher currents, paralleling multiple ICL7660SCBAZ-T units reduces effective output resistance per Equation 6. The datasheet confirms 20mA operation with <120Ω max ROUT across 0°C to +70°C.
Is an external Schottky diode required for ICL7660SCBAZ-T reliability?
An external Schottky diode from VOUT to CAP− is recommended only when V+ exceeds 5.5V and has fast dV/dt (>2V/µs), to prevent latchup caused by forward-biasing Q4's body diode. For ≤5.5V supplies or slower-rising inputs, the ICL7660SCBAZ-T operates reliably without external diodes-verified across temperature and voltage ranges in the "Electrical Specifications" and "Do's and Don'ts" sections of its datasheet.
ICL7660SCBAZ-T 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660SCBAZ-T FAQ
1.How can I place an order for ICL7660SCBAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SCBAZ-T 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 ICL7660SCBAZ-T reliable?
The price and inventory of ICL7660SCBAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SCBAZ-T is usually 5 days.
3.What payment methods are accepted for ICL7660SCBAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SCBAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SCBAZ-T?
ICL7660SCBAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SCBAZ-T 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 ICL7660SCBAZ-T?
For technical support, including ICL7660SCBAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SCBAZ-T requirements.
6.How does Aetrix verify that ICL7660SCBAZ-T is sourced from the original manufacturer or authorized distributors?
All ICL7660SCBAZ-T 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 ICL7660SCBAZ-T meets industry standards.
7.What is the process for return or replacement of ICL7660SCBAZ-T?
All ICL7660SCBAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SCBAZ-T, 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 ICL7660SCBAZ-T part is unused and in its original packaging.
Return procedure for ICL7660SCBAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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