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Renesas ICL7660CBAZA-T
- Part No.:
- ICL7660CBAZA-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660CBAZA-T.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,602
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Product details
Overview
ICL7660CBAZA-T 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 output voltages from –1.5V to –12V. It integrates an RC oscillator, voltage level translator, series regulator, and four power MOS switches. Requires only two external non-critical capacitors and supports voltage doubling up to ±22.8V with 12V input - used in RS-232 power supplies and data acquisition systems.
For engineers reviewing the ICL7660CBAZA-T datasheet, ICL7660CBAZA-T pinout, ICL7660CBAZA-T application, or ICL7660CBAZA-T equivalent, this device offers verified 96% minimum power efficiency, 10 kHz nominal oscillator frequency at 5V, 60 Ω typical output source resistance at 20 mA, LV pin for low-voltage optimization, and Boost pin (Pin 1) for frequency scaling - all confirmed over 0°C to +70°C commercial temperature range.
Technical Context
The ICL7660CBAZA-T 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 and oscillator. Its substrate bias logic network actively senses VOUT to dynamically adjust switch substrates and prevent latchup - critical during startup and short-circuit conditions.
It features dual-mode operation: standard negative conversion (VOUT ≈ –VIN) and configurable voltage doubling (VOUT ≈ +2VIN). The LV pin bypasses the internal series regulator below 3.5V to improve low-voltage efficiency, while the BOOST pin (Pin 1) raises oscillator frequency ~3.5× when tied to V+, reducing output impedance without larger capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 12V input - enables direct use with 3.3V, 5V, and 12V logic rails without external regulation. |
| Oscillator Frequency | 10 kHz nominal at 5V (free-running); boosted to ~35 kHz with Pin 1 = V+ - lowers output impedance and ripple. |
| Power Efficiency | ≥96% minimum at RL = 5 kΩ - reduces thermal load and improves battery life in portable instrumentation. |
| Output Source Resistance | 60 Ω typical at IOUT = 20 mA, V+ = 5V - defines maximum deliverable current before >5% voltage droop. |
| Voltage Conversion Efficiency | ≥99% open-circuit - ensures near-ideal charge transfer with minimal loss when lightly loaded. |
| Supply Current | 80 µA typical at +25°C, 5V - enables ultra-low-quiescent operation in always-on sensor interfaces. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded systems and industrial control peripherals. |
Pinout & Package
ICL7660CBAZA-T is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package, Pb-free and RoHS-compliant, with 1.27 mm lead pitch and JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency boost control | Tie to V+ to increase switching frequency ~3.5×, lowering output impedance and enabling smaller external capacitors. |
| 2 (CAP+) | Charge pump capacitor connection | Anode terminal of primary pump capacitor C1; carries full switching current - requires low-ESR electrolytic or ceramic. |
| 3 (GND) | Ground reference | System ground return for internal regulator, oscillator, and switch logic; must be low-impedance for stable operation. |
| 4 (CAP–) | Charge reservoir capacitor connection | Cathode terminal of reservoir capacitor C2; forms negative output node - polarity-sensitive for polarized capacitors. |
| 5 (VOUT) | Negative output terminal | Delivers regulated negative voltage (–VIN); must not exceed GND potential to avoid latchup - add Schottky clamp if needed. |
| 6 (OSC) | Oscillator timing node | Connect external capacitor to lower frequency (e.g., 100 pF → 1 kHz); or drive with external clock via 1 kΩ 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 | Main power input (1.5–12V); also powers internal circuitry - decoupling capacitor recommended near this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) frequency scaling | Enables 3.5× higher oscillator frequency without external clock - reduces output impedance by ~60% and allows 0.1 µF capacitors instead of 10 µF. |
| LV pin for low-voltage optimization | Bypasses internal series regulator below 3.5V - improves conversion efficiency and extends usable range down to 1.5V input. |
| Integrated latchup protection | Active substrate bias control prevents destructive latchup during startup, short-circuit, or fast-rising input transients - eliminates need for external diodes in most designs. |
| Wide-input voltage compatibility | Operates from 1.5V to 12V - supports legacy 5V systems, modern 3.3V microcontrollers, and 12V industrial rails without redesign. |
| Configurable topology support | Supports negative conversion (–VIN), voltage doubling (+2VIN), supply splitting (±VIN/2), and cascaded multiplication - one IC replaces multiple discrete solutions. |
Applications
| RS-232 Power Supply | Negative Supply for Data Acquisition |
|---|---|
|
Use Scenario: Generating ±12V or ±5V from a single 5V microcontroller rail to drive RS-232 line drivers/receivers. IC Role / Device Role / Timing Role: Charge-pump voltage converter providing isolated negative rail; no timing interface required - self-oscillating. Use Value: Eliminates need for inductive DC-DC converters or dual-output supplies - reduces BOM cost, board area, and EMI. |
Use Scenario: Providing clean –5V bias for precision op-amps and ADC reference buffers in portable test equipment. IC Role / Device Role / Timing Role: Low-noise negative supply generator; output impedance directly impacts analog signal integrity and offset drift. Use Value: 60 Ω typical ROUT and ≥99% open-circuit efficiency minimize load-induced voltage sag and thermal drift in high-resolution measurements. |
| Supply Splitter for Bipolar Op-Amps | Low-Power Instrumentation Bias |
|
Use Scenario: Converting a +9V battery into ±4.5V rails for rail-to-rail op-amp circuits in handheld meters. IC Role / Device Role / Timing Role: Bidirectional voltage splitter; uses internal switches to equally share load between positive and negative outputs. Use Value: Enables true bipolar operation from single-ended sources - avoids external regulators and maintains matched rail symmetry under varying loads. |
Use Scenario: Biasing low-power sensors and signal-conditioning stages in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Ultra-low-quiescent voltage converter; 80 µA supply current minimizes standby drain on coin-cell or Li-ion batteries. Use Value: Extends operational lifetime beyond 5 years in always-on sensing nodes - validated over 0°C to +70°C commercial range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1044CPA+ | Same 8-pin PDIP/SOIC footprint; 1.5–6V input range (narrower than ICL7660CBAZA-T's 1.5–12V); 100 µA max supply current at 5V. | Limited to ≤6V systems; less suitable for 9V/12V industrial inputs or voltage-doubling above 12V. | Select MAX1044CPA+ only when operating strictly within 1.5–6V and requiring legacy Maxim support. |
| TC7660COA | Pin-compatible SOIC-8; 1.5–10V input range; 120 µA max supply current at 5V; no BOOST pin - fixed 10 kHz oscillator. | Lacks frequency scaling capability; higher quiescent current limits battery life in ultra-low-power designs. | Choose TC7660COA where BOOST functionality is unnecessary and cost sensitivity outweighs efficiency requirements. |
Compared with MAX1044CPA+ and TC7660COA, the ICL7660CBAZA-T delivers broader input voltage support (up to 12V), lower quiescent current (80 µA typ), and active frequency scaling via BOOST pin - making it optimal for multi-rail industrial and portable instrumentation where flexibility and efficiency are critical.
Availability
ICL7660CBAZA-T is available at Aetrix Electronics and suitable for RS-232 power supplies, data acquisition front-ends, and bipolar op-amp biasing requiring stable component supply across commercial temperature grades.
Supply support for ICL7660CBAZA-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 markets.
The ICL7660 family was designed as a drop-in upgrade to the legacy ICL7660, delivering extended voltage range, lower quiescent current, and enhanced latchup immunity for reliable operation in noise-sensitive analog and interface applications.
FAQ
What is the function of the BOOST pin on the ICL7660CBAZA-T?
The BOOST pin (Pin 1) on the ICL7660CBAZA-T increases the internal oscillator frequency by approximately 3.5× when tied to V+. This reduces output impedance and ripple, enabling smaller external capacitors (e.g., 0.1 µF instead of 10 µF) without sacrificing performance - especially valuable in space-constrained PCB layouts.
Can the ICL7660CBAZA-T generate positive voltage doubling?
Yes, the ICL7660CBAZA-T can be configured as a positive voltage doubler delivering up to +22.8V from a 12V input. This is achieved using external diodes and capacitors per Figure 18 in the datasheet. The output source resistance remains ~60 Ω at 10 mA, supporting moderate-current analog rails.
What is the purpose of the LV pin on the ICL7660CBAZA-T?
The LV pin on the ICL7660CBAZA-T disables the internal series regulator when tied to GND, improving efficiency for input voltages below 3.5V. For inputs ≥3.5V, the LV pin must remain floating to prevent latchup - this dual-mode operation extends usable range down to 1.5V while maintaining robustness at higher voltages.
Does the ICL7660CBAZA-T require external diodes for latchup protection?
No - the ICL7660CBAZA-T incorporates active substrate bias control and improved SCR latchup protection, eliminating the need for external diodes in most applications. An external Schottky diode from VOUT to CAP– is only recommended when V+ > 5V and has a rise rate exceeding 2 V/µs, per datasheet Do's and Don'ts.
What is the maximum output current capability of the ICL7660CBAZA-T?
The ICL7660CBAZA-T delivers up to 20 mA with ≤5% voltage droop at 5V input, based on its 60 Ω typical output source resistance. At lower currents (e.g., 3 mA with 2V input), ROUT rises to 250 Ω - design margin and capacitor selection (low-ESR, adequate value) directly determine practical current limits in each application.
ICL7660CBAZA-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):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 45mA
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660CBAZA-T FAQ
1.How can I place an order for ICL7660CBAZA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660CBAZA-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 ICL7660CBAZA-T reliable?
The price and inventory of ICL7660CBAZA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660CBAZA-T is usually 5 days.
3.What payment methods are accepted for ICL7660CBAZA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660CBAZA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660CBAZA-T?
ICL7660CBAZA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660CBAZA-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 ICL7660CBAZA-T?
For technical support, including ICL7660CBAZA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660CBAZA-T requirements.
6.How does Aetrix verify that ICL7660CBAZA-T is sourced from the original manufacturer or authorized distributors?
All ICL7660CBAZA-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 ICL7660CBAZA-T meets industry standards.
7.What is the process for return or replacement of ICL7660CBAZA-T?
All ICL7660CBAZA-T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660CBAZA-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 ICL7660CBAZA-T part is unused and in its original packaging.
Return procedure for ICL7660CBAZA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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