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Renesas ICL7660SCBAZ
- Part No.:
- ICL7660SCBAZ
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660SCBAZ.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,777
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Product details
Overview
ICL7660SCBAZ from Intersil (now 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 features a 10kHz nominal oscillator, BOOST pin for frequency scaling up to ~35kHz, and LV pin for low-voltage operation down to 1.5V. It is widely used in RS-232 power supplies and data acquisition systems requiring compact ±5V generation.
For engineers reviewing the ICL7660SCBAZ datasheet, ICL7660SCBAZ pinout, ICL7660SCBAZ application, or ICL7660SCBAZ equivalent, this page delivers verified technical context, validated pin functions, confirmed efficiency and impedance specs, and real-world application mappings - all tied explicitly to the ICL7660SCBAZ commercial-grade SOIC-8 variant.
Technical Context
The ICL7660SCBAZ 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 switched-capacitor negative voltage converter. Its substrate bias logic network actively prevents SCR latchup by dynamically adjusting switch body biases based on VOUT feedback.
It supports three operating modes: standard inverting converter (VOUT ≈ –VIN), voltage doubler (VOUT ≈ +2VIN), and supply splitter (VOUT = ±VIN/2). The BOOST pin (Pin 1) increases oscillator current to raise fOSC up to ~35kHz, reducing output impedance without larger capacitors; the LV pin (Pin 6) bypasses the internal regulator when tied to GND for 1.5V–3.5V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 12V - supports direct +5V logic rail conversion to ±5V; LV pin required for reliable start-up below 3.5V. |
| Oscillator Frequency | 10kHz (typ, no load, 5V); up to ~35kHz with BOOST pin high - enables lower output impedance using 0.1µF capacitors instead of 10µF. |
| Output Source Resistance | 60Ω (typ, 20mA, 25°C) - defines voltage droop under load; rises to 120Ω at full industrial temp range (-40°C to +85°C). |
| Power Efficiency | 96% min (5kΩ load) - ensures minimal heat rise in space-constrained designs; maintained across 0°C to +70°C commercial range. |
| Voltage Conversion Efficiency | 99% min (open-circuit) - critical for low-quiescent-current battery-powered instrumentation and sensor front-ends. |
| Supply Current | 80µA typ (25°C), ≤180µA max (0°C to +70°C) - enables micropower operation in always-on monitoring circuits. |
| Package | 8-lead SOIC (Pb-free, RoHS-compliant, M8.15 drawing) - surface-mount compatible with standard reflow profiles per TB493. |
Pinout & Package
ICL7660SCBAZ is housed in an 8-lead Pb-free SOIC package (JEDEC MS-012, package drawing M8.15), rated for 0°C to +70°C operation. Thermal resistance θJA = 160°C/W (typ), θJC = 48°C/W (typ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BOOST | Oscillator current control | Connect to V+ to increase fOSC ~3.5×; reduces output impedance and ripple - essential for miniaturized capacitor selection. |
| 2 - CAP+ | Charge pump capacitor node | AC-coupled terminal for primary pump capacitor (C1); polarity-sensitive with polarized electrolytics (+ to Pin 2). |
| 3 - GND | Reference ground | System return path; must be low-impedance; output latchup occurs if VOUT exceeds GND potential. |
| 4 - CAP- | Charge reservoir capacitor node | AC-coupled terminal for reservoir capacitor (C2); + terminal connects to GND for inverting mode. |
| 5 - VOUT | Negative output | Delivers inverted voltage (≈ –VIN); requires Schottky diode to CAP- if V+ > 5V and dV/dt > 2V/µs to prevent Q4 body-diode forward bias. |
| 6 - LV | Low-voltage regulator bypass | Tie to GND for 1.5V–3.5V operation; leave floating for 3.5V–12V to avoid latchup - not optional; misconnection causes failure. |
| 7 - OSC | Oscillator timing node | Accepts external capacitor to reduce fOSC (e.g., 100pF → 1kHz); or external clock (via 1kΩ series resistor) for precise synchronization. |
| 8 - V+ | Positive input supply | Primary power input; accepts 1.5V–12V; internal regulator drops ~0.3V when LV is floating - impacts minimum usable input. |
Key Features
| Feature | Design Value |
|---|---|
| BOOST pin frequency enhancement | Enables 3.5× higher switching frequency without external clock - cuts output impedance by ~60% and allows 0.1µF capacitors in place of 10µF. |
| LV pin for sub-3.5V operation | Bypasses internal regulator to maintain functionality down to 1.5V - critical for single-cell Li-ion or alkaline-powered portable instruments. |
| Guaranteed 99% open-circuit conversion efficiency | Minimizes quiescent loss in high-impedance sensing nodes - preserves battery life in remote data loggers and IoT edge sensors. |
| Integrated SCR latchup protection | Active substrate bias control eliminates need for external diodes across VOUT–CAP- in most 5V applications - simplifies BOM and layout. |
| Pb-free SOIC-8 packaging | RoHS-compliant, JEDEC-standard M8.15 footprint - supports automated SMT assembly and IPC/JEDEC J-STD-020 reflow compliance. |
Applications
| RS-232 Transceiver Power Supply | Negative Rail for Data Acquisition Front-Ends |
|---|---|
|
Use Scenario: Generating -5V to -12V from a single +5V microcontroller rail to bias RS-232 line drivers (e.g., MAX232 alternatives). IC Role / Device Role / Timing Role: Charge-pump inverter providing isolated negative supply; operates at fixed 10kHz or boosted 35kHz for low-noise signaling. Use Value: Eliminates need for external inductors or transformers - enables fully capacitor-based, ultra-low-EMI RS-232 interface in compact embedded modules. |
Use Scenario: Providing clean -5V reference for dual-supply op-amps (e.g., ICL7611) and ADC analog front-ends in portable test equipment. IC Role / Device Role / Timing Role: Precision negative voltage source with <1% regulation error under 10mA load; LV pin ensures stable start-up from 3.3V logic rails. Use Value: Maintains 99% open-circuit efficiency to minimize self-heating - preserves offset stability and THD performance in precision signal conditioning paths. |
| ±5V Split-Supply for Op-Amp Circuits | Low-Power Sensor Biasing in Battery Systems |
|
Use Scenario: Deriving symmetrical ±5V rails from a single +5V USB or wall adapter supply for rail-to-rail op-amp stages in audio preamps or active filters. IC Role / Device Role / Timing Role: Inverting converter paired with passive splitting or regulated feedback (e.g., ICL7611 loop); BOOST pin lowers output impedance for dynamic loads. Use Value: Delivers 60Ω typical output impedance - supports 10mA peak currents without >0.6V droop, enabling fast-settling AC-coupled amplifier stages. |
Use Scenario: Biasing MEMS accelerometers or piezoelectric sensors requiring negative bias voltage in coin-cell–powered wearables and environmental monitors. IC Role / Device Role / Timing Role: Micropower inverter consuming ≤80µA quiescent current; operates reliably at 1.8V input when LV pin is grounded. Use Value: 1.5V minimum input and 96% power efficiency extend usable battery life beyond 12 months in low-duty-cycle sensing applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660ACBAZ-T | ICL7660A variant: lower 26µA typ supply current at 3V, but reduced 3kHz min oscillator frequency at -40°C; same SOIC-8 package and pinout. | Preferred for ultra-low-power 3V systems where 3kHz minimum fOSC is acceptable; less suitable for high-current or noise-sensitive 5V RS-232 apps. | Select ICL7660ACBAZ-T only when supply current <30µA is mandatory and temperature range includes -40°C; verify oscillator stability in final layout. |
| MAX660CPA+ | Maxim variant: 85% min power efficiency, 120Ω max output resistance, no BOOST pin; requires larger 22µF capacitors for equivalent performance. | Legacy drop-in replacement in existing ICL7660 footprints; lacks BOOST and LV pins - cannot match ICL7660SCBAZ's 1.5V start-up or 35kHz capability. | Choose MAX660CPA+ only for cost-sensitive, non-miniaturized designs where 120Ω output impedance and 22µF caps are acceptable trade-offs. |
Compared with ICL7660ACBAZ-T and MAX660CPA+, the ICL7660SCBAZ uniquely combines BOOST-enabled high-frequency operation, LV-bypassed 1.5V start-up, and guaranteed 99% open-circuit efficiency - making it optimal for space-constrained, battery-aware, and noise-sensitive inverting supply designs.
Availability
ICL7660SCBAZ is available at Aetrix Electronics and suitable for RS-232 transceiver power supplies, data acquisition system negative rails, and ±5V split-supply op-amp circuits requiring stable component supply across commercial temperature range (0°C to +70°C).
Supply support for ICL7660SCBAZ 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 ICL7660SCBAZ belongs to the Super Voltage Converter product line, engineered to replace legacy ICL7660 devices with extended voltage range, lower quiescent current, and enhanced latchup immunity - targeting compact, low-cost, inductorless DC/DC solutions.
FAQ
What is the minimum input voltage supported by the ICL7660SCBAZ?
The ICL7660SCBAZ supports a minimum input voltage of 1.5V when the LV pin is tied to GND to bypass the internal series regulator. At input voltages above 3.5V, the LV pin must remain floating to prevent latchup. This dual-mode operation makes the ICL7660SCBAZ uniquely capable of powering from single-cell alkaline or Li-ion sources while maintaining compatibility with standard 5V logic rails.
How does the BOOST pin affect the performance of the ICL7660SCBAZ?
The BOOST pin (Pin 1) on the ICL7660SCBAZ increases oscillator drive current, raising the nominal switching frequency from 10kHz to approximately 35kHz when pulled high to V+. This directly reduces output impedance and ripple, enabling use of smaller 0.1µF external capacitors instead of 10µF - a critical advantage for space-constrained PCB layouts in portable instrumentation and IoT endpoints.
Can the ICL7660SCBAZ be used as a voltage doubler?
Yes, the ICL7660SCBAZ can be configured as a positive voltage doubler generating up to 22.8V from a 12V input, using the circuit in Figure 18 of FN3179. In this mode, internal switches charge C1 to V+ – VF, then transfer charge to C2 via external diodes D1 and D2, yielding VOUT ≈ 2V+ – 2VF. Output source impedance remains ~60Ω at 10mA load with 5V input.
Is an external Schottky diode required for safe operation of the ICL7660SCBAZ?
An external Schottky diode from VOUT (Pin 5) to CAP- (Pin 4) is required only when the input voltage exceeds 5V and its rise rate exceeds 2V/µs - conditions that forward-bias Q4's body diode and risk latchup. For standard 5V applications with controlled slew rates, the ICL7660SCBAZ operates safely without external diodes, thanks to its integrated substrate bias logic.
What is the guaranteed output source resistance of the ICL7660SCBAZ over temperature?
The ICL7660SCBAZ guarantees ≤120Ω maximum output source resistance at 20mA load across its full commercial temperature range (0°C to +70°C), per FN3179 Rev 7.01 Electrical Specifications table. At +25°C, typical ROUT is 60Ω. This specification directly determines voltage droop under load and is validated during 100% production testing at +25°C.
ICL7660SCBAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660SCBAZ FAQ
1.How can I place an order for ICL7660SCBAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SCBAZ 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 reliable?
The price and inventory of ICL7660SCBAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SCBAZ is usually 5 days.
3.What payment methods are accepted for ICL7660SCBAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SCBAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SCBAZ?
ICL7660SCBAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SCBAZ 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?
For technical support, including ICL7660SCBAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SCBAZ requirements.
6.How does Aetrix verify that ICL7660SCBAZ is sourced from the original manufacturer or authorized distributors?
All ICL7660SCBAZ 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 meets industry standards.
7.What is the process for return or replacement of ICL7660SCBAZ?
All ICL7660SCBAZ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SCBAZ, 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 part is unused and in its original packaging.
Return procedure for ICL7660SCBAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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