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Renesas ICL7660SCBA-T
- Part No.:
- ICL7660SCBA-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660SCBA-T.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,537
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Product details
Overview
ICL7660SCBA-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 (10 kHz nominal at 5V), internal power MOS switches, voltage level translator, and series regulator. Requires only two external non-critical capacitors and supports boost-mode operation via Pin 1 for lower output impedance-used in RS-232 power supplies and data acquisition negative rails.
For engineers reviewing the ICL7660SCBA-T datasheet, ICL7660SCBA-T pinout, ICL7660SCBA-T application, or ICL7660SCBA-T equivalent, this device serves as an enhanced drop-in replacement for legacy ICL7660 with extended voltage range, lower supply current (≤180 µA over 0°C to +70°C), guaranteed 96% power efficiency, and improved SCR latchup protection-critical when selecting compact, low-quiescent DC/DC solutions for space-constrained analog and interface circuits.
Technical Context
The ICL7660SCBA-T implements a four-switch charge-pump topology using integrated P- and N-channel MOSFETs, with substrate bias control logic to prevent latchup during startup and short-circuit conditions. Its internal oscillator operates at 5–35 kHz depending on BOOST pin state and external loading, and its LV pin enables bypass of the internal series regulator for improved low-voltage operation below 3.5V.
Unlike basic charge pumps, it features dynamic substrate network control tied to VOUT sensing, ensuring reverse bias integrity for S3/S4 substrates across temperature and load. The device supports multiple configurations: inverting converter, voltage doubler (up to 22.8V from 12V input), cascaded multiplication, and supply splitting-all without requiring critical capacitor tolerances or precision timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.5V to 12V - supports single-cell LiFePO₄, 3.3V/5V logic rails, and industrial 12V supplies without external regulation |
| Output Voltage Range | –1.5V to –12V - provides rail-splitting capability and true complementary negative supply generation |
| Oscillator Frequency | 5–35 kHz - adjustable via BOOST pin (×3.5 gain) or external capacitor; higher frequency reduces output impedance with smaller capacitors |
| Supply Current | ≤180 µA at 0°C to +70°C - enables ultra-low-power operation in battery-backed instrumentation and portable sensors |
| Power Efficiency | ≥96% at RL = 5 kΩ - minimizes thermal rise and input power draw in high-efficiency portable designs |
| Output Source Resistance | 60–120 Ω at 20 mA - defines achievable load regulation and ripple under typical 10 µF capacitor conditions |
| Voltage Conversion Efficiency | ≥99% open-circuit - ensures near-ideal charge transfer for low-noise analog references and precision ADC biasing |
Pinout & Package
ICL7660SCBA-T is housed in an 8-lead SOIC package (M8.15 drawing), surface-mount compatible, RoHS-compliant, with standard 1.27 mm lead pitch and 5.0 mm × 6.2 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Connecting to V+ increases oscillator current and raises fOSC ~3.5×, lowering output impedance for compact capacitor use |
| 2 (CAP+) | Charge pump capacitor connection | Anode terminal for primary flying capacitor; polarity-sensitive with polarized electrolytics (+ to Pin 2) |
| 3 (GND) | Ground reference | System ground return; output voltage referenced to this node; must not be lifted above GND to avoid latchup |
| 4 (CAP–) | Reservoir capacitor connection | Cathode terminal for output reservoir capacitor; ties to VOUT through internal switch network |
| 5 (VOUT) | Negative output terminal | Delivers inverted supply; must remain ≤ GND to prevent forward-biasing internal body diodes and latchup |
| 6 (OSC) | Oscillator timing node | Accepts external capacitor to reduce fOSC or external clock (via 1 kΩ series resistor) for noise-sensitive applications |
| 7 (LV) | Low-voltage mode enable | Tie to GND for V+ < 3.5V to bypass internal regulator; leave floating for V+ > 3.5V to prevent latchup |
| 8 (V+) | Positive input supply | Main power input; absolute max rating +13.0V; requires local decoupling if source impedance >25 Ω |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) control | Enables 3.5× oscillator frequency increase, reducing output impedance by up to 60% and allowing 0.1 µF capacitors instead of 10 µF |
| LV pin for low-voltage optimization | Disables internal series regulator below 3.5V, improving efficiency and enabling reliable start-up from 1.5V sources |
| Guaranteed 96% power efficiency | Validated across full commercial temperature range (0°C to +70°C), minimizing heat dissipation in sealed enclosures |
| Improved SCR latchup protection | Integrated substrate bias network actively monitors VOUT and adjusts S3/S4 substrate potentials to prevent destructive latchup |
| Simple two-capacitor operation | Eliminates need for inductors, transformers, or precision timing components-reducing BOM count and layout complexity |
Applications
| RS-232 Transceiver Power Supply | Negative Rail for Data Acquisition Systems |
|---|---|
Use Scenario: Generating ±12V or ±5V from a single 5V microcontroller supply to drive legacy RS-232 transceivers (e.g., MAX232 alternatives). IC Role / Device Role / Timing Role: Inverting charge-pump converter providing regulated negative voltage; no timing constraints beyond oscillator stability. Use Value: Eliminates need for dual-output isolated DC/DC modules; achieves <120 Ω output impedance at 10 mA, sufficient for 250 kbps RS-232 signaling. | Use Scenario: Supplying clean –5V bias to op-amps, ADC reference buffers, and sensor front-ends in portable test equipment. IC Role / Device Role / Timing Role: Low-noise negative voltage generator; output ripple minimized via low-ESR capacitors and BOOST-enabled high-frequency operation. Use Value: Delivers ≥99% open-circuit conversion efficiency and <10 mVpp ripple (with 10 µF/low-ESR caps), preserving SNR in 16-bit ADC systems. |
| Supply Splitter for Single-Rail Op-Amp Circuits | Low-Power Instrumentation Bias Generator |
Use Scenario: Converting a +9V battery supply into ±4.5V rails for rail-to-rail op-amp signal conditioning in handheld meters. IC Role / Device Role / Timing Role: Bidirectional voltage splitter using internal switch symmetry; no external clock required. Use Value: Enables balanced loading across both rails with matched output impedance (~65 Ω each side), supporting >10 mA per rail without cross-regulation issues. | Use Scenario: Providing stable –3.3V bias to low-power current-sense amplifiers and thermocouple cold-junction compensators in IoT edge nodes. IC Role / Device Role / Timing Role: Ultra-low-IQ inverting converter operating from 3.3V logic rail; LV pin grounded for optimal 1.5–3.5V efficiency. Use Value: Draws only 26–100 µA (typ./max) at 3V, extending battery life in always-on monitoring applications while maintaining <250 Ω output resistance at 3 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660ACBAZ-T | Same pinout and electrical specs; rated for 0°C to +70°C but uses different process variant (A-grade) with slightly higher supply current (≤125 µA) at 3V | Optimized for lower-voltage operation (V+ = 3V); less suitable for 12V inputs where S-grade headroom matters | Select ICL7660ACBAZ-T only when primary supply is ≤3.3V and lowest possible quiescent current is critical |
| MAX1044CPA+ | Pin-compatible but requires external timing resistor; higher typical supply current (250 µA); no BOOST pin or LV control | Lacks low-voltage optimization and active latchup protection; needs careful external component selection for stability | Choose MAX1044CPA+ only if legacy board reuse mandates identical footprint and no BOOST/LV functionality is needed |
Compared with ICL7660ACBAZ-T and MAX1044CPA+, the ICL7660SCBA-T delivers superior low-voltage start-up (1.5V), guaranteed 96% efficiency across temperature, and integrated latchup immunity-making it the preferred choice for new designs requiring robustness, wide input range, and minimal external components.
Availability
ICL7660SCBA-T is available at Aetrix Electronics and suitable for RS-232 power supplies, data acquisition negative rails, and supply-splitting applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ICL7660SCBA-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 ICL7660S family was designed specifically for compact, low-component-count DC/DC voltage inversion in space-constrained analog and interface systems-emphasizing latchup immunity, wide input range, and ease of use without external timing components.
FAQ
What is the maximum input voltage rating for the ICL7660SCBA-T?
The ICL7660SCBA-T has an absolute maximum supply voltage rating of +13.0V. Its specified operational input range is 1.5V to 12V. Exceeding 13.0V risks permanent damage due to internal junction breakdown or destructive latchup, even momentarily. Always observe derating guidelines and ensure transient suppression if used in noisy industrial environments.
Can the ICL7660SCBA-T generate positive voltage doubling?
Yes, the ICL7660SCBA-T can be configured as a positive voltage doubler using external diodes and capacitors (per Figure 18 in FN3179). With a 12V input, it delivers up to 22.8V output. This mode leverages the same internal charge-pump switches but reorients external components-no change to the ICL7660SCBA-T itself is required.
How does the BOOST pin (Pin 1) affect output performance of the ICL7660SCBA-T?
Connecting the BOOST pin to V+ increases oscillator current and raises switching frequency ~3.5× (e.g., from 10 kHz to ~35 kHz), which directly lowers output source resistance and ripple. This allows use of smaller, cheaper 0.1 µF capacitors instead of 10 µF while maintaining comparable load regulation-critical for miniaturized PCB layouts.
Is an external Schottky diode required for safe operation of the ICL7660SCBA-T?
An external Schottky diode from VOUT to CAP– is required only when V+ exceeds 5V *and* its rise time exceeds 2 V/µs (e.g., hot-plug or poorly regulated supplies). The diode prevents forward-biasing Q4's body diode, which could trigger latchup. For stable 5V logic rails with proper decoupling, no external diode is needed.
What is the purpose of the LV pin on the ICL7660SCBA-T, and how should it be used?
When V+ is below 3.5V, tie the LV pin to GND to bypass the internal series regulator and improve efficiency and start-up reliability. For V+ > 3.5V, leave LV floating-connecting it to GND in this condition causes latchup. This dual-mode design enables robust operation from 1.5V coin cells up to 12V industrial rails using the same ICL7660SCBA-T device.
ICL7660SCBA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
ICL7660SCBA-T FAQ
1.How can I place an order for ICL7660SCBA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660SCBA-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 ICL7660SCBA-T reliable?
The price and inventory of ICL7660SCBA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660SCBA-T is usually 5 days.
3.What payment methods are accepted for ICL7660SCBA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660SCBA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660SCBA-T?
ICL7660SCBA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660SCBA-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 ICL7660SCBA-T?
For technical support, including ICL7660SCBA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660SCBA-T requirements.
6.How does Aetrix verify that ICL7660SCBA-T is sourced from the original manufacturer or authorized distributors?
All ICL7660SCBA-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 ICL7660SCBA-T meets industry standards.
7.What is the process for return or replacement of ICL7660SCBA-T?
All ICL7660SCBA-T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660SCBA-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 ICL7660SCBA-T part is unused and in its original packaging.
Return procedure for ICL7660SCBA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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