My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX660ESA+T
- Part No.:
- MAX660ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX660ESA+T.pdf
- Description:
- IC REG CHRG PUMP INV 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,358
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX660ESA+T from Maxim Integrated is a CMOS monolithic charge-pump voltage converter that inverts +1.5V to +5.5V input to -1.5V to -5.5V output or doubles input to +3.0V to +11.0V, delivers 100mA output current, features selectable 10kHz/80kHz oscillator frequency via FC pin, and operates with only two external capacitors-replacing inductor-based switching regulators in space-constrained battery-powered systems like handheld medical instruments.
For engineers reviewing the MAX660ESA+T datasheet, MAX660ESA+T pinout, MAX660ESA+T application, or MAX660ESA+T equivalent, this page provides verified technical context on its inverting/doubling operation, low-quiescent-current (120µA) performance, 6.5Ω typical output impedance, temperature-stable oscillator behavior, and direct upgrade path from ICL7660 in SO-8 footprint.
Technical Context
The MAX660ESA+T implements a two-phase switched-capacitor charge-pump architecture with internal MOSFET switches, supporting both inverting and voltage-doubling modes via LV pin configuration (LV = GND for inverter, LV = OUT for doubler). Its oscillator frequency is programmable via FC pin (10kHz typ when open, 80kHz typ when tied to V+) or externally adjustable using capacitor or clock signal at OSC pin.
Output regulation is unregulated but highly load-stable due to low 6.5Ω typical output impedance and <0.65V voltage drop at 100mA. It operates across -40°C to +85°C, supports 1.5V–5.5V input range, and achieves ≥88% typical conversion efficiency at 100mA load with C1=C2=150µF aluminum electrolytics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5V to +5.5V - supports single-cell Li-ion, alkaline, and regulated 3.3V/5V rails without external LDO pre-regulation. |
| Output Current | 100mA continuous - sufficient for dual-rail op-amp biasing, LCD bias, or RS-232 interface generation. |
| Oscillator Frequency | 10kHz (FC open) or 80kHz (FC = V+) - enables trade-off between capacitor size (smaller at 80kHz) and quiescent current (lower at 10kHz). |
| Output Impedance | 6.5Ω typical - ensures ≤0.65V output voltage drop at 100mA, critical for stable analog supply rails. |
| Quiescent Supply Current | 120µA typical - extends battery life in always-on portable instrumentation. |
| Conversion Efficiency | 88% typical at 100mA - exceeds discrete charge-pump alternatives while eliminating magnetic components. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended commercial environments, matching MAX660ESA ordering code. |
Pinout & Package
MAX660ESA+T is housed in an 8-pin SO (Small Outline) package per JEDEC MS-012, 150-mil body width, with gull-wing leads and 1.27mm pitch. Pin 1 is marked by beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts +1.5V to +5.5V; powers internal logic and charge-pump switches. |
| OSC | Oscillator control node | Internally connected to 15pF capacitor; accepts external timing capacitor or CMOS clock signal (0.1V to V+–0.1V swing). |
| LV | Low-voltage mode select | Tie to GND for <3V input (bypasses regulator); leave open or tie to GND for ≥3V; must be GND when OSC overdriven. |
| OUT | Negative or doubled output | Delivers inverted (-VIN) or doubled (+2×VIN) voltage; rated for 120mA continuous, short-circuit safe for 1 second. |
| CAP- | Charge-pump capacitor negative terminal | Connects to negative terminal of flying capacitor C1; alternates polarity with CAP+ during pump cycle. |
| GND | Power ground reference | System ground return for V+, CAP-, and internal circuitry; separate from load ground in some layouts. |
| CAP+ | Charge-pump capacitor positive terminal | Connects to positive terminal of flying capacitor C1; phase-complementary to CAP-. |
| FC | Frequency control input | Open = 10kHz oscillator; tied to V+ = 80kHz oscillator; no effect when OSC is externally driven. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting or doubling operation | Selectable via LV pin: GND → inverter (-VIN), OUT → doubler (+2×VIN), enabling one IC to serve dual rail-generation needs. |
| Pin-compatible ICL7660 upgrade | Direct SO-8 replacement with 100mA output (vs. 20mA), 6.5Ω output impedance (vs. 55Ω), and 120µA quiescent current (vs. 80µA). |
| Capacitor-efficient design | Operates with only two low-cost 1µF–150µF electrolytic/tantalum capacitors-no inductors, no EMI concerns, minimal board area. |
| Programmable oscillator | FC pin selects 10kHz/80kHz base frequency; OSC pin accepts external cap or clock, allowing ripple frequency tuning from 5kHz to 40kHz. |
| Low-output-drop performance | 0.65V typical voltage drop at 100mA load ensures -4.35V output from +5V input-critical for precision analog subsystems. |
Applications
| Laptop Peripheral Power | Medical Sensor Biasing |
|---|---|
Use Scenario: Generating negative supply for op-amps driving piezoelectric transducers in portable ultrasound probes. IC Role / Device Role / Timing Role: Charge-pump voltage inverter providing -5V rail from main 3.3V system supply. Use Value: Eliminates need for bulky inductor-based DC/DC, reduces EMI in sensitive analog front-end, and maintains stable -4.9V output under 50mA dynamic load. |
Use Scenario: Dual-rail power for low-noise instrumentation amplifiers in handheld ECG monitors. IC Role / Device Role / Timing Role: Inverting converter generating -3.3V from 3.3V main rail to enable true bipolar signal acquisition. Use Value: 120µA quiescent current extends battery runtime; 6.5Ω output impedance limits offset drift under varying sensor loading. |
| RS-232 Transceiver Supply | Industrial PLC Analog Output Stage |
Use Scenario: Providing ±5V supplies for MAX232-class RS-232 level shifters in compact industrial HMI modules. IC Role / Device Role / Timing Role: Dual-mode converter: one MAX660ESA+T inverts for -5V, another doubles for +10V (regulated down to +5V). Use Value: Replaces transformer-isolated or inductor-based solutions; FC pin set to 80kHz allows use of 10µF ceramics instead of 100µF electrolytics. |
Use Scenario: Generating isolated negative bias for DAC output buffers in 4–20mA current-loop transmitter circuits. IC Role / Device Role / Timing Role: Inverting converter delivering -12V from 12V system rail to support rail-to-rail DAC output swing. Use Value: Guaranteed ROUT <15Ω with C1=C2=10µF ensures <150mV droop at 10mA load-preserving 16-bit DAC accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge-pump voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX860ESA+ | 50mA output current, 12Ω typical output impedance, 0.2mA quiescent current at 6kHz - lower current, higher dropout, higher IQ. | Suitable for low-power, low-current applications where 100mA is not required; not recommended for op-amp dual-rail loads >30mA. | Select MAX860ESA+ only when board space is constrained (also available in µMAX) and load current remains ≤40mA. |
| ICL7660CPA | 20mA output, 55Ω output impedance, 80µA quiescent current - legacy device with lower performance and older process. | Compatible only in low-current (<15mA), non-critical applications; lacks FC pin and LV flexibility of MAX660ESA+T. | Choose ICL7660CPA only for cost-sensitive legacy replacements where 100mA capability and efficiency gains are unnecessary. |
Compared with MAX860ESA+ and ICL7660CPA, the MAX660ESA+T delivers 2× the output current of MAX860ESA+, 8× lower output impedance than ICL7660CPA, and retains full pin compatibility with the latter-making it the optimal upgrade for existing ICL7660 designs requiring higher drive capability without PCB rework.
Availability
MAX660ESA+T is available at Aetrix Electronics and suitable for medical instrumentation, handheld test equipment, and industrial analog signal conditioning requiring stable component supply, long-term lifecycle assurance, and guaranteed SO-8 packaging consistency.
Supply support for MAX660ESA+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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX660ESA+T belongs to Maxim's legacy charge-pump voltage converter product line, designed specifically to replace inductor-based DC/DC converters in space- and noise-sensitive applications where compact, low-EMI, capacitor-only power conversion is essential.
FAQ
What is the maximum continuous output current of the MAX660ESA+T?
The MAX660ESA+T delivers 100mA continuous output current into resistive loads when operating within its specified temperature and input voltage ranges. Absolute maximum ratings permit 120mA, but sustained operation above 100mA may exceed thermal limits in SO-8 package at elevated ambient temperatures. Derating is recommended above +70°C ambient per the 5.88mW/°C thermal resistance specification.
Can the MAX660ESA+T be used to generate a positive doubled output?
Yes, the MAX660ESA+T can operate in voltage-doubling mode by connecting the LV pin to the OUT pin. In this configuration, it produces approximately +2×VIN (e.g., +9.35V from +5V input) at up to 100mA. Input voltage must be ≥+2.5V for reliable doubling operation, and the OSC pin must not be overdriven in this mode per datasheet restrictions.
What capacitor values are recommended for stable operation of the MAX660ESA+T at 100mA load?
For stable 100mA operation, Maxim recommends C1 = C2 = 150µF aluminum electrolytic capacitors with ≤0.2Ω ESR. Lower values (e.g., 10µF) are acceptable at 80kHz oscillator frequency but increase output impedance and voltage droop. Ceramic capacitors are discouraged due to insufficient capacitance and microphonic effects unless paralleled with bulk electrolytics.
Is the MAX660ESA+T pin-compatible with the ICL7660?
Yes, the MAX660ESA+T is fully pin-compatible with the ICL7660 in SO-8 and DIP packages. It retains identical pinout, voltage ratings, and basic functionality while upgrading output current (100mA vs. 20mA), reducing output impedance (6.5Ω vs. 55Ω), and adding FC/LV control pins for enhanced flexibility-enabling drop-in replacement in most legacy designs.
Does the MAX660ESA+T require external components beyond capacitors?
No, the MAX660ESA+T requires only two external capacitors (C1 and C2) for basic inverting or doubling operation. No diodes, inductors, or resistors are needed. The FC and OSC pins are optional: FC selects oscillator frequency, and OSC allows external timing control-but both may be left unconnected for default 10kHz operation.
MAX660ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 10kHz, 80kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX660ESA+T FAQ
1.How can I place an order for MAX660ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX660ESA+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 MAX660ESA+T reliable?
The price and inventory of MAX660ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX660ESA+T is usually 5 days.
3.What payment methods are accepted for MAX660ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX660ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX660ESA+T?
MAX660ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX660ESA+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 MAX660ESA+T?
For technical support, including MAX660ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX660ESA+T requirements.
6.How does Aetrix verify that MAX660ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX660ESA+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 MAX660ESA+T meets industry standards.
7.What is the process for return or replacement of MAX660ESA+T?
All MAX660ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX660ESA+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 MAX660ESA+T part is unused and in its original packaging.
Return procedure for MAX660ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX660ESA+T 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…
