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Renesas ICL7660ACBAZA-T
- Part No.:
- ICL7660ACBAZA-T
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660ACBAZA-T.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:33,973
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Product details
Overview
ICL7660ACBAZA-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 -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 guaranteed operation over 0°C to +70°C for RS-232 power supplies and data acquisition systems.
For engineers reviewing the ICL7660ACBAZA-T datasheet, ICL7660ACBAZA-T pinout, ICL7660ACBAZA-T application, or ICL7660ACBAZA-T equivalent, key selection criteria include its 8-pin SOIC package, LV pin control for low-voltage optimization, 60Ω typical output source resistance at 20mA, and compatibility with 10µF electrolytic pump/reservoir capacitors in space-constrained designs.
Technical Context
The ICL7660ACBAZA-T 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 switch substrates and prevent latch-up under start-up or short-circuit conditions.
Operation relies on charge transfer between external C1 (pump) and C2 (reservoir) capacitors via alternating switch states. The BOOST pin increases oscillator drive current to raise switching frequency-reducing required capacitor values and output impedance-while the LV pin bypasses the internal regulator when tied to GND for improved 1.5V–3.5V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V–12V input enables single-supply ±5V generation from standard logic rails without external regulators. |
| Oscillator Frequency | 5–35kHz (pin-selectable); 10kHz nominal at 5V - directly sets charge-pump ripple and output impedance trade-off. |
| Output Source Resistance | 60Ω typical at 20mA/5V - defines voltage droop under load and minimum usable output current capability. |
| Power Efficiency | ≥96% at 5kΩ load - ensures minimal thermal rise and high energy reuse in battery-powered instrumentation. |
| Operating Temperature | 0°C to +70°C commercial range - validated for industrial control interfaces and embedded communication peripherals. |
| Supply Current | 26–100µA at 3V/25°C - ultra-low quiescent draw supports always-on sensor nodes and low-power wake-up circuits. |
| Voltage Conversion Efficiency | 99% open-circuit - preserves near-ideal -VIN output magnitude critical for precision analog front-ends. |
Pinout & Package
ICL7660ACBAZA-T is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package, Pb-free and RoHS-compliant, with 1.27mm lead pitch and JEDEC MS-012AC outline (PKG DWG # M8.15). Thermal resistance θJA = 160°C/W enables operation without heatsinking in ambient temperatures ≤70°C.
| 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. |
| 2 (CAP+) | Charge pump capacitor connection | Anode of pump capacitor C1; alternately charged/discharged to transfer energy to CAP− and VOUT nodes. |
| 3 (GND) | Ground reference | Common return for internal regulator, oscillator, and switch logic; must be low-impedance for stable operation. |
| 4 (CAP−) | Charge reservoir capacitor connection | Cathode of reservoir capacitor C2; stores inverted charge and provides low-ripple negative output. |
| 5 (VOUT) | Negative output terminal | Delivers regulated -VIN; requires external Schottky diode to CAP− if V+ > 5V and dV/dt > 2V/µs to prevent latch-up. |
| 6 (OSC) | External oscillator timing node | Accepts external clock (via 1kΩ series resistor) or external capacitor to set custom switching frequency. |
| 7 (LV) | Low-voltage mode enable | Tie to GND to bypass internal regulator for 1.5–3.5V operation; leave floating for 3.5–12V to avoid latch-up. |
| 8 (V+) | Positive input supply | Primary power input; feeds internal regulator, oscillator, and switch drivers; max rating 13V absolute. |
Key Features
| Feature | Design Value |
|---|---|
| Boost pin (Pin 1) frequency enhancement | Enables 3× oscillator speed increase (to ~35kHz), reducing required C1/C2 size by factor of ~3 while maintaining output current capability. |
| LV pin selectable low-voltage mode | Disables internal regulator when grounded, extending functional input range down to 1.5V without efficiency penalty. |
| Guaranteed 96% power efficiency | Validated across full temperature and load range - minimizes heat generation in sealed enclosures and portable devices. |
| 100% tested at 3V | Ensures reliable startup and regulation at lowest specified input, critical for brown-out tolerant systems and Li-ion powered designs. |
| Improved SCR latch-up protection | Active substrate bias control prevents destructive latch-up during transient overvoltage, hot-swap, or output short events. |
Applications
| RS-232 Transceiver Power | Data Acquisition Front-End |
|---|---|
|
Use Scenario: Generating ±12V from a single +5V microcontroller rail to drive legacy RS-232 transceivers (e.g., MAX232 replacements). IC Role / Device Role / Timing Role: Negative voltage converter providing isolated -12V rail; no timing synchronization required - operates autonomously via internal oscillator. Use Value: Eliminates need for dual-output DC/DC converters; achieves <120Ω output impedance at 10mA with 10µF capacitors, meeting RS-232 driver compliance. |
Use Scenario: Supplying clean -5V bias to op-amp input stages and ADC reference buffers in 16-bit precision measurement systems. IC Role / Device Role / Timing Role: Low-noise negative rail generator; BOOST pin used to raise fOSC to 35kHz, suppressing switching noise from entering analog signal path. Use Value: 99% open-circuit conversion efficiency preserves signal integrity; LV pin grounded for stable -5V output from 5V rail with <10mV ripple. |
| Portable Instrumentation Supply | Split-Rail Audio Amplifier Bias |
|
Use Scenario: Creating ±5V rails from a single-cell Li-ion (3.0–4.2V) supply in handheld multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: Dual-mode converter: LV pin grounded for 3V operation, BOOST pin unused to minimize EMI in sensitive measurement environments. Use Value: 26µA supply current at 3V extends battery life; guaranteed 1.5V minimum start-up allows operation until battery reaches end-of-discharge. |
Use Scenario: Providing symmetrical ±9V bias for Class-AB audio op-amps (e.g., NE5532) in compact headphone amplifiers using only one 9V battery. IC Role / Device Role / Timing Role: Supply splitter generating VOUT = –V+ and using V+ as +9V rail; no external clock needed - free-running oscillator suffices. Use Value: Output impedance <250Ω at 20mA supports 32Ω headphone loads; 8-pin SOIC footprint fits tight PCB layouts without requiring transformer-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660SCBAZA | Same architecture but rated for 0°C to +70°C commercial range; slightly higher supply current (80µA typ. vs. 26µA at 3V). | Identical pinout and function; optimized for cost-sensitive non-industrial designs where extended temp is unnecessary. | Select ICL7660SCBAZA only if lower quiescent current is not critical and RoHS-compliant SOIC packaging is required. |
| MAX1044CPA+ | Pin-compatible but uses different oscillator architecture; 100µA typ. supply current at 5V; no BOOST pin. | Lacks frequency boost capability - requires larger 22µF capacitors for equivalent output impedance at 10kHz. | Choose MAX1044CPA+ only when legacy design reuse is mandatory and board layout cannot accommodate BOOST pin routing. |
Compared with ICL7660ACBAZA-T, ICL7660SCBAZA offers identical functionality at marginally higher quiescent current, while MAX1044CPA+ lacks frequency scaling - making ICL7660ACBAZA-T optimal for space-constrained, low-power, and EMI-sensitive negative rail generation.
Availability
ICL7660ACBAZA-T is available at Aetrix Electronics and suitable for RS-232 interface design, portable instrumentation, and split-rail audio amplifier biasing requiring stable component supply across production lifecycles.
Supply support for ICL7660ACBAZA-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 ICL7660A product line was designed specifically for low-power, space-efficient charge-pump voltage conversion in embedded systems where transformerless negative rail generation is essential.
FAQ
What is the minimum input voltage required for ICL7660ACBAZA-T to start and regulate?
The ICL7660ACBAZA-T is 100% tested at 3V and guaranteed to operate down to 1.5V input. At 1.5V–3.5V, the LV pin must be tied to GND to bypass the internal series regulator; this ensures reliable startup and stable -1.5V to -3.5V output without latch-up. Below 1.5V, regulation is not assured per datasheet specifications.
Can ICL7660ACBAZA-T generate positive voltage doubling, and what external components are needed?
Yes, the ICL7660ACBAZA-T supports positive voltage doubling using the configuration in Figure 18 of FN3179. It requires two external diodes (e.g., 1N4148) and two capacitors (C1, C2). With a 5V input, it delivers ~9V output (2×V+ minus diode drops); output source impedance is ~60Ω at 10mA, and no BOOST pin connection is needed for basic operation.
How does the BOOST pin on ICL7660ACBAZA-T affect capacitor selection and output performance?
Connecting the BOOST pin (Pin 1) to V+ raises the oscillator frequency from 10kHz to ~35kHz, which reduces the 1/(fPUMP×C1) term in output impedance. This allows use of smaller pump capacitors - e.g., 0.1µF instead of 10µF - while maintaining equivalent output current capability and lowering ripple, critical for miniaturized PCB designs.
Is an external Schottky diode required when using ICL7660ACBAZA-T with a 12V input?
Yes - per FN3179 Section "Do's and Don'ts", an external Schottky diode from VOUT (Pin 5) to CAP− (Pin 4) is required when V+ > 5V and the input dV/dt exceeds 2V/µs. At 12V, this prevents forward-biasing Q4's body diode during fast transients, eliminating latch-up risk. A BAT54 or equivalent Schottky is recommended.
What is the maximum continuous output current supported by ICL7660ACBAZA-T at 5V input?
The ICL7660ACBAZA-T delivers up to 20mA continuous output current at 5V input with ≤120Ω output source resistance (max, 0°C to +70°C). For higher currents, paralleling multiple ICL7660ACBAZA-T units is supported - output resistance scales inversely with device count, enabling ~10mA per additional unit with shared C2.
ICL7660ACBAZA-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:
- 3kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660ACBAZA-T FAQ
1.How can I place an order for ICL7660ACBAZA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660ACBAZA-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 ICL7660ACBAZA-T reliable?
The price and inventory of ICL7660ACBAZA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660ACBAZA-T is usually 5 days.
3.What payment methods are accepted for ICL7660ACBAZA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660ACBAZA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660ACBAZA-T?
ICL7660ACBAZA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660ACBAZA-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 ICL7660ACBAZA-T?
For technical support, including ICL7660ACBAZA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660ACBAZA-T requirements.
6.How does Aetrix verify that ICL7660ACBAZA-T is sourced from the original manufacturer or authorized distributors?
All ICL7660ACBAZA-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 ICL7660ACBAZA-T meets industry standards.
7.What is the process for return or replacement of ICL7660ACBAZA-T?
All ICL7660ACBAZA-T units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660ACBAZA-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 ICL7660ACBAZA-T part is unused and in its original packaging.
Return procedure for ICL7660ACBAZA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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