My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX680ESA+
- Part No.:
- MAX680ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX680ESA+.pdf
- Description:
- IC REG CHARGE PUMP 2VIN DL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:632
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX680ESA+ from Maxim Integrated is a monolithic CMOS dual charge-pump voltage converter that generates ±10V outputs from a single +5V input. It requires four external capacitors, delivers up to 10mA per rail, exhibits 150Ω typical positive output source resistance and 90Ω negative output source resistance at +25°C, and operates across -40°C to +85°C for use in battery-powered analog power supplies.
For engineers reviewing the MAX680ESA+ datasheet, MAX680ESA+ pinout, MAX680ESA+ application, or MAX680ESA+ equivalent, key selection criteria include its ±10V conversion capability from 2V–6V input, 8kHz internal oscillator, SO-8 narrow package, temperature-rated performance, and discrete capacitor-based topology versus integrated-capacitor alternatives.
Technical Context
The MAX680ESA+ implements two independent switched-capacitor charge pumps: a positive doubler (VCC → V+) and an inverting pump (V+ → V−), with non-overlapping 8kHz clock phases driving eight CMOS power MOSFET switches. Its output voltages are unregulated and load-dependent, governed by output source resistances (150Ω/90Ω typ) and droop equations derived from IL+ and IL−.
It lacks internal reservoir or pump capacitors-unlike the MAX681-and relies on external 4.7µF–10µF electrolytics for C1–C4. Absolute maximum ratings clamp VCC at +6.2V, V+ at +12V, and V− at −12V via on-chip zeners, limiting safe operating voltage range to 2.0V–6.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.0V to 6.0V - supports 3V lithium cells and standard 5V logic rails without external regulation |
| Output Voltages | ±10V at light load - V+ ≈ 2×VCC, V− ≈ −2×VCC; both droop linearly with load current |
| Output Source Resistance | 150Ω (V+), 90Ω (V−) at +25°C - defines voltage drop under load: e.g., 10mA yields 1.5V droop on V+ |
| Oscillator Frequency | 8kHz - sets ripple frequency and capacitor sizing; lower than MAX864's 200kHz, requiring larger caps |
| Supply Current | ≤3mA over −40°C to +85°C - enables low-power operation in portable instrumentation |
| Power Efficiency | 85% - reduces thermal load and extends battery life in energy-constrained systems |
| Voltage-Conversion Efficiency | 95% - minimizes loss between input and idealized doubled output voltage |
Pinout & Package
MAX680ESA+ is housed in an 8-pin narrow SO (SOIC-8) package with 1.27mm pitch, RoHS-compliant, and rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1+) | Positive pump capacitor top plate | Connects to positive terminal of C1; forms first stage of voltage-doubling charge pump |
| 2 (C1−) | Positive pump capacitor bottom plate | Connects to VCC during charging phase; referenced to input supply |
| 3 (C2+) | Negative pump capacitor top plate | Connects to positive terminal of C2; driven by V+ rail for inversion |
| 4 (C2−) | Negative pump capacitor bottom plate | Connects to GND during charging; inverted output developed across C2/C4 |
| 5 (V−) | Negative output terminal | Delivers regulated-negative-equivalent voltage; sourced from C4; high-current path |
| 6 (GND) | Analog ground reference | Common return for input, oscillators, and both charge-pump switching networks |
| 7 (V+) | Positive output terminal | Delivers doubled-positive voltage; sourced from C3; supplies V− pump and external loads |
| 8 (VCC) | Positive input supply | Accepts 2V–6V DC; powers internal oscillator and switch drivers; clamped at 6.2V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent charge-pump architecture | Enables simultaneous ±10V generation from one supply while allowing asymmetric loading (e.g., 10mA on V+, 5mA on V−) |
| 8kHz internal oscillator | Eliminates need for external timing components; fixed frequency simplifies EMI filtering and capacitor selection |
| Low quiescent current (≤3mA) | Supports >100-hour runtime on coin-cell batteries when paired with low-IQ regulators like MAX664/MAX666 |
| Monolithic CMOS design | Integrates all control logic, drivers, and eight power MOSFET switches-no external gate drivers or level shifters required |
| Wide input voltage range (2.0V–6.0V) | Permits direct operation from 3V LiMnO₂, 3.3V LDOs, or legacy 5V rails without pre-regulation |
Applications
| ±10V from +5V Logic Supply | ±6V from 3V Lithium Cell |
|---|---|
Use Scenario: Powering op-amps and data-acquisition front-ends in industrial PLC I/O modules where only a 5V system rail is available. IC Role / Device Role / Timing Role: Dual-rail voltage converter generating symmetric analog supply rails from digital logic voltage. Use Value: Eliminates need for isolated DC/DC converters or split-rail transformers, reducing BOM cost and board area by >40%. | Use Scenario: Portable handheld multimeters powered by a single CR2032 coin cell. IC Role / Device Role / Timing Role: Primary analog power generator enabling bipolar signal conditioning with minimal external components. Use Value: Achieves ±6V at <500µA total system quiescent current, extending battery life beyond 200 hours. |
| Operational Amplifier Power Supplies | Battery-Operated Equipment |
Use Scenario: Biasing precision instrumentation amplifiers (e.g., MAX44267) in portable EEG sensors. IC Role / Device Role / Timing Role: Low-noise, low-ripple dual-rail source supporting rail-to-rail input/output op-amps. Use Value: Delivers <30mVpp ripple at 5mA load using 10µF reservoir caps-sufficient for 16-bit SAR ADC references. | Use Scenario: Power management in compact gas detectors with electrochemical sensors requiring ±5V bias. IC Role / Device Role / Timing Role: Core voltage translation IC enabling sensor excitation and signal chain bias from a 3.6V Li-ion cell. Use Value: Supports full-scale sensor operation across −20°C to +60°C ambient without derating, thanks to extended temperature grade. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual charge-pump voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX681CPD | Includes internal 1.5µF (C1/C2) and 2.2µF (C3/C4) capacitors; 14-pin DIP package; no external caps needed | Reduces PCB footprint and component count but increases package height and limits layout flexibility | Select MAX681CPD when minimizing external components and board area outweighs SO-8 mounting preference |
| MAX864CSA+ | 200kHz oscillator; supports smaller 1µF–2.2µF ceramic capacitors; higher efficiency at light loads; same SO-8 package | Enables lower-profile designs and reduced EMI filtering burden due to higher fundamental frequency | Select MAX864CSA+ for new designs prioritizing size, efficiency, and modern ceramic cap compatibility over legacy MAX680 footprint reuse |
Compared with MAX680ESA+, MAX681CPD eliminates external capacitors at the cost of larger package and fixed internal values, while MAX864CSA+ offers 25× higher switching frequency and ceramic-cap compatibility-making it preferable for space-constrained, low-EMI applications-but requires redesign of capacitor network and layout.
Availability
MAX680ESA+ is available at Aetrix Electronics and suitable for industrial instrumentation, portable test equipment, and analog signal-chain power supplies requiring stable component supply across extended temperature ranges.
Supply support for MAX680ESA+ 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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX680/MAX681 product line was engineered specifically for compact, low-component-count dual-rail generation in battery-powered and space-constrained analog systems-prioritizing simplicity, wide input range, and predictable droop behavior over regulation.
FAQ
What is the maximum continuous output current supported by the MAX680ESA+?
The MAX680ESA+ delivers up to 10mA from each output rail (V+ and V−) under typical conditions (VCC = 5V, TA = +25°C). At higher temperatures or lower input voltages, output current capability decreases due to increased output source resistance-e.g., V+ source resistance rises to 350Ω over −40°C to +85°C, limiting practical current to ~7mA before excessive droop. The MAX680ESA+ datasheet specifies 10mA as the maximum useful load before voltage deviation exceeds design margins.
Can the MAX680ESA+ operate from a 3V lithium battery?
Yes, the MAX680ESA+ operates from 2.0V to 6.0V, making it fully compatible with 3V lithium coin cells (e.g., CR2032) and primary lithium batteries. At 3V input, it generates approximately ±6V outputs-verified in Figure 5 of the datasheet-while maintaining ≤500µA quiescent current. Output droop remains predictable using the published source resistance values, enabling accurate system-level voltage margining for downstream regulators like MAX664/MAX666.
Does the MAX680ESA+ require external timing components?
No, the MAX680ESA+ integrates an 8kHz oscillator and requires no external resistors or capacitors for clock generation. This oscillator drives non-overlapping phases for the positive and negative charge-pump switches. Unlike adjustable-frequency converters, the MAX680ESA+'s fixed 8kHz frequency simplifies design but mandates larger external capacitors (e.g., 4.7µF–10µF electrolytics) compared to higher-frequency alternatives like the MAX864CSA+.
How does output voltage droop behave on the MAX680ESA+ under load?
Output voltage droop on the MAX680ESA+ follows linear relationships defined by output source resistance: VDROP+ = (IL+ + IL−) × RS+ and VDROP− = IL− × RS−. With RS+ = 150Ω and RS− = 90Ω at +25°C, drawing 5mA from V+ and 5mA from V− causes V+ to drop by 1.5V and V− by 0.45V relative to no-load ±10V. These equations are validated in the datasheet's Detailed Description section and enable precise rail prediction without iterative simulation.
Is the MAX680ESA+ pin-compatible with other devices in the MAX680 family?
Yes, all MAX680 variants-including MAX680ESA+, MAX680CSA, MAX680EPA, and MAX680MJA-share identical 8-pin SO, DIP, or CERDIP pinouts and electrical functionality. Only temperature range, package type, and reliability screening differ. This allows drop-in replacement across grades: for example, upgrading from commercial-grade MAX680CSA to industrial-grade MAX680ESA+ requires no PCB changes, only qualification of the extended −40°C to +85°C operating range.
MAX680ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive and Negative (Dual Rail)
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- ±2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 10mA
- Frequency - Switching:
- 8kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX680ESA+ FAQ
1.How can I place an order for MAX680ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX680ESA+ 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 MAX680ESA+ reliable?
The price and inventory of MAX680ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX680ESA+ is usually 5 days.
3.What payment methods are accepted for MAX680ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX680ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX680ESA+?
MAX680ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX680ESA+ 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 MAX680ESA+?
For technical support, including MAX680ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX680ESA+ requirements.
6.How does Aetrix verify that MAX680ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX680ESA+ 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 MAX680ESA+ meets industry standards.
7.What is the process for return or replacement of MAX680ESA+?
All MAX680ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX680ESA+, 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 MAX680ESA+ part is unused and in its original packaging.
Return procedure for MAX680ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX680ESA+ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
