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Microchip Technology TC7662BEOA
- Part No.:
- TC7662BEOA
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TC7662BEOA.pdf
- Description:
- IC REG CHARG PUMP INV 20MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,564
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Product details
Overview
TC7662BEOA from Microchip Technology is a charge pump DC-DC voltage converter IC that generates a regulated negative output (–VIN) from a +1.5V to +15V input using only two external capacitors-no inductor required. It delivers up to 20mA output current with 96% power efficiency at 5V input and operates with internal oscillator frequencies of 10kHz (default) or 35kHz (Boost pin = V+), supporting RS-232 power generation and data acquisition system biasing.
For engineers reviewing the TC7662BEOA datasheet, TC7662BEOA pinout, TC7662BEOA application, or TC7662BEOA equivalent, this device serves as a pin-compatible upgrade to the ICL7660 with extended temperature range (–40°C to +85°C), improved low-voltage operation via LV pin control, and reduced output impedance through Boost-enabled high-frequency switching.
Technical Context
The TC7662BEOA integrates MOSFET charge pump switches, an RC oscillator with selectable frequency (10kHz or 35kHz), voltage-level translators, and substrate bias logic to prevent latch-up across its full operating range. Its dual-mode oscillator allows dynamic trade-offs between ripple reduction (higher fOSC) and switching loss minimization (lower fOSC).
Internal anti-latchup circuitry includes a voltage regulator whose operation is disabled by grounding the LV pin for inputs ≤3.5V-enabling stable startup and low-VIN functionality-while leaving LV open ensures safe operation above 3.5V. Output source resistance ranges from 65Ω (typ, 25°C) to 120Ω (max, –40°C to +85°C) at 20mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5V to +15V - supports single-supply systems from low-power logic (1.5V) to industrial rails (15V) |
| Oscillator Frequency | 10kHz (default) or 35kHz (Boost pin = V+) - enables smaller external capacitors (e.g., 0.1µF) without sacrificing output current |
| Power Efficiency | 96% (typ, RL = 5kΩ) - minimizes thermal rise and extends battery life in portable instrumentation |
| Output Source Resistance | 65Ω (typ, 25°C, 20mA) - defines maximum load regulation error and voltage droop under dynamic current steps |
| Operating Temperature | –40°C to +85°C - qualified for automotive cabin, industrial control, and outdoor embedded applications |
| Supply Current | ≤180µA (–40°C to +85°C, Boost open) - enables ultra-low-quiescent designs in always-on sensor nodes |
| Voltage Conversion Efficiency | 99.9% (typ, no load) - preserves input-to-output voltage fidelity for precision analog biasing |
Pinout & Package
TC7662BEOA is housed in an 8-pin SOIC package (JEDEC MS-012AC, 3.9mm × 4.9mm body, 1.27mm pitch), rated for surface-mount assembly and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Connect to V+ to raise oscillator frequency from 10kHz to 35kHz; reduces output impedance and ripple |
| 2 (CAP+) | Pump capacitor positive terminal | Drives charge transfer cycle; connects to + terminal of polarized electrolytic C1 (e.g., 10µF) |
| 3 (GND) | Ground reference | Common return for all internal circuitry and external capacitors; must be low-impedance |
| 4 (CAP–) | Pump capacitor negative terminal | Completes charge transfer path; connects to – terminal of C1 and + terminal of C2 |
| 5 (VOUT) | Negative output terminal | Delivers inverted output (–VIN); connects to – terminal of reservoir capacitor C2 and load |
| 6 (LV) | Low-voltage mode enable | Ground for VIN ≤3.5V to disable internal regulator and improve startup; leave open for VIN >3.5V |
| 7 (OSC) | Oscillator timing node | Accepts external capacitor to ground for frequency reduction (e.g., 100pF → 1kHz); unused in default mode |
| 8 (V+) | Positive supply input | Primary power rail; absolute max rating +16.5V; requires local 2.2µF bypass if source impedance >25Ω |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible ICL7660 upgrade | Direct drop-in replacement in existing layouts-no PCB changes required for legacy designs |
| Two-capacitor operation | Eliminates magnetic components: reduces EMI, saves board space, and lowers BOM cost vs. inductor-based converters |
| Wide input voltage range | Operates from 1.5V (e.g., single-cell LiFePO4) to 15V (industrial rails), enabling universal supply compatibility |
| Configurable oscillator | Frequency selection (10/35kHz) or external clocking (via 1kΩ series resistor) allows ripple/noise optimization per application |
| Latch-up protection | Integrated substrate bias logic and voltage regulator prevent destructive latch-up across –40°C to +85°C range |
Applications
| RS-232 Transceiver Power | Negative Bias for Data Acquisition |
|---|---|
|
Use Scenario: Generating ±5V from a single +5V microcontroller supply to drive RS-232 line drivers (e.g., IH5142) in embedded serial interfaces. IC Role / Device Role / Timing Role: Charge pump voltage inverter providing isolated negative rail for TTL-to-RS232 level shifting. Use Value: Eliminates need for dual-output DC-DC modules; achieves <100mV ripple at 10mA load with 10µF/10µF capacitor pair. |
Use Scenario: Supplying –5V bias to op-amp input stages and ADC reference buffers in portable data loggers with single-ended sensors. IC Role / Device Role / Timing Role: Precision negative rail generator with 99.9% voltage conversion efficiency to minimize offset drift. Use Value: Maintains <±2mV output regulation over 0–20mA load steps due to 65Ω typical output impedance at 25°C. |
| Voltage Splitting for Dual Rails | Positive Voltage Doubling |
|
Use Scenario: Deriving ±7.5V from +15V supply to power op-amps in audio preamplifiers requiring symmetrical rails. IC Role / Device Role / Timing Role: Bidirectional charge pump configured as supply splitter to halve input voltage on both polarities. Use Value: Enables 50µF/50µF split-rail configuration delivering <250mA combined load with matched sourcing/sinking capability. |
Use Scenario: Generating +9V from +5V for LCD bias or RF front-end amplifiers where positive boost is needed alongside negative rail. IC Role / Device Role / Timing Role: Reconfigured charge pump acting as voltage doubler using external diodes (D1/D2) and dual capacitor network. Use Value: Delivers ~+9V output (2×VIN – 2×VF) with ~60Ω source impedance at 10mA, suitable for moderate-current analog loads. |
Availability
TC7662BEOA is available at Aetrix Electronics and suitable for RS-232 interface design, portable data acquisition systems, and dual-rail op-amp biasing requiring stable component supply across industrial temperature grades.
Supply support for TC7662BEOA 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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with emphasis on reliability and long-term product availability.
The TC7662B family is designed for low-noise, inductorless DC-DC conversion in space-constrained and cost-sensitive applications such as portable instrumentation, sensor interfaces, and legacy system upgrades.
FAQ
What is the maximum input voltage rating for the TC7662BEOA?
The TC7662BEOA has an absolute maximum supply voltage rating of +16.5V. Operation beyond this value risks permanent damage. The recommended operating range remains +1.5V to +15V per the datasheet's Electrical Characteristics table, with guaranteed performance across the full –40°C to +85°C temperature range. Exceeding +16.5V on V+ or applying voltages outside GND–V+ on any pin may cause destructive latch-up.
How does the BOOST pin affect TC7662BEOA performance?
Connecting the BOOST pin (Pin 1) to V+ increases the internal oscillator frequency from 10kHz to 35kHz. This reduces output impedance and ripple, allowing smaller external capacitors (e.g., 0.1µF instead of 10µF) while maintaining comparable output current. At 35kHz, supply current rises to 350µA (max, –40°C to +85°C), trading quiescent power for improved dynamic response.
Can TC7662BEOA replace ICL7660 in existing designs?
Yes, TC7662BEOA is explicitly designed as a pin-compatible upgrade to the ICL7660. It shares identical pinout, footprint, and basic functional behavior while offering higher efficiency (96% vs. ~90%), wider input range (1.5V–15V vs. 1.5V–12V), and extended temperature range (–40°C to +85°C). No PCB modifications are required for drop-in replacement in most legacy designs.
What is the role of the LV pin on TC7662BEOA?
The LV pin enables low-voltage operation mode. For input voltages ≤3.5V, grounding LV disables the internal voltage regulator to improve startup reliability and reduce dropout. For inputs >3.5V, LV must remain open to ensure latch-up protection. Incorrect LV connection (e.g., grounding LV at 5V input) compromises anti-latchup circuitry and may cause device failure.
What capacitor types and values are recommended for TC7662BEOA?
TC7662BEOA requires two external polarized electrolytic capacitors: C1 (pump, 10µF typical) connected between CAP+ and CAP–, and C2 (reservoir, 10µF typical) between VOUT and GND. For Boost-mode (35kHz), 0.1µF X7R ceramics suffice. Low-ESR electrolytics (<10Ω) are critical-high ESR directly degrades output impedance and ripple per VRIPPLE ≅ (IOUT × t2/C2) + (2 × IOUT × ESRC2).
TC7662BEOA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- 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):
- 15V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 20mA
- Frequency - Switching:
- 10kHz ~ 35kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TC7662BEOA FAQ
1.How can I place an order for TC7662BEOA through Aetrix?
Please submit a Request for Quotation (RFQ) for TC7662BEOA 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 TC7662BEOA reliable?
The price and inventory of TC7662BEOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC7662BEOA is usually 5 days.
3.What payment methods are accepted for TC7662BEOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC7662BEOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC7662BEOA?
TC7662BEOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC7662BEOA 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 TC7662BEOA?
For technical support, including TC7662BEOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC7662BEOA requirements.
6.How does Aetrix verify that TC7662BEOA is sourced from the original manufacturer or authorized distributors?
All TC7662BEOA 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 TC7662BEOA meets industry standards.
7.What is the process for return or replacement of TC7662BEOA?
All TC7662BEOA units undergo pre-shipment inspection (PSI). If there is an issue with TC7662BEOA, 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 TC7662BEOA part is unused and in its original packaging.
Return procedure for TC7662BEOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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