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Analog Devices Inc./Maxim Integrated MAX1852EXT+T
- Part No.:
- MAX1852EXT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX1852EXT+T.pdf
- Description:
- IC REG CHRG PUMP INV 30MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,342
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Product details
Overview
The MAX1852EXT+T from Maxim Integrated is a monolithic CMOS inverting charge-pump voltage converter in a 6-pin SC70 package, delivering -1×VIN output with 30mA continuous current, 15Ω output resistance, and 50kHz fixed switching frequency. It operates from +2.5V to +5.5V input and generates negative supply rails for analog circuitry in space-constrained battery-powered systems.
For engineers reviewing the MAX1852EXT+T datasheet, MAX1852EXT+T pinout, MAX1852EXT+T application, or MAX1852EXT+T equivalent, key selection criteria include input voltage range, shutdown quiescent current (0.002µA typ), output resistance vs. temperature, capacitor sizing for ripple control, and compatibility with low-ESR ceramic flying/output capacitors.
Technical Context
The MAX1852EXT+T integrates four on-chip power-MOSFET switches and oscillator control circuitry to implement a two-phase switched-capacitor inverter topology. It uses external flying (C1) and reservoir (C2) capacitors to generate regulated negative output voltage with no inductors required.
Its 50kHz switching frequency balances low quiescent supply current (68µA typ) against external capacitor size-enabling compact designs using 4.7µF ceramic capacitors while maintaining ≤15Ω output resistance at +25°C and VIN = +5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.5V to +5.5V - supports direct connection to common logic rails (3.3V, 5V) without pre-regulation |
| Output Current | 30mA RMS - sufficient to power op-amps, ADCs, or small LCD bias circuits |
| Output Resistance | 15Ω (typ @ +25°C, VIN = +5V) - determines load regulation error and voltage droop under load |
| Quiescent Supply Current | 68µA (typ @ +25°C) - enables micropower operation in always-on subsystems |
| Shutdown Current | 0.002µA (typ @ +25°C) - reduces system standby power to nanoampere level |
| Oscillator Frequency | 50kHz (fixed) - sets capacitor sizing trade-off: lower frequency allows larger C1/C2 for lower ESR impact |
| Voltage Conversion Efficiency | 99% (no load) - minimizes input power waste during light-load conditions |
Pinout & Package
Package: 6-pin SC70 (40% smaller than SOT23), 1.3mm × 2.1mm footprint, 0.65mm pitch, thin-profile surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+ | Positive terminal of flying capacitor | Connects to high-side switch node; requires low-ESR ceramic capacitor (e.g., 4.7µF X7R) |
| OUT | Inverted output voltage terminal | Delivers regulated -VIN; connects to load and reservoir capacitor C2 |
| GND | Analog/digital ground reference | Common return path for input, output, and internal switches; must be low-impedance |
| SHDN | Logic-controlled shutdown enable | High = active; low = 0.002µA shutdown mode; compatible with 3.3V/5V logic levels |
| IN | Positive input supply rail | Accepts +2.5V to +5.5V; bypass capacitor (C3) recommended for noise suppression |
| C1- | Negative terminal of flying capacitor | Connects to low-side switch node; forms charge-transfer path with C1+ |
Key Features
| Feature | Design Value |
|---|---|
| Slew-rate limited switching | Reduces EMI emissions by controlling edge rates of internal MOSFET gate drivers |
| Ultra-small SC70 package | Enables integration into handheld devices and wearables where board area is constrained |
| Logic-compatible shutdown | 0.7×VIN logic-high threshold ensures reliable activation from 3.3V or 5V microcontrollers |
| Single-supply inverting topology | Eliminates need for external inductors or dual supplies-only two 4.7µF ceramic caps required |
| Temperature-stable output resistance | 15Ω typical across -40°C to +85°C, enabling predictable load regulation in industrial environments |
Applications
| Negative Supply Generation | Small LCD Panel Bias |
|---|---|
Use Scenario: Generating -5V or -3.3V from existing +5V or +3.3V logic rails to power op-amps, comparators, or data converters. IC Role / Device Role / Timing Role: Inverting charge-pump voltage converter providing isolated negative rail without magnetics. Use Value: Enables dual-supply analog signal chains using only one positive input rail and minimal external components. | Use Scenario: Supplying VEE bias voltage for segment or character LCD modules in portable instrumentation. IC Role / Device Role / Timing Role: Low-noise negative voltage source with fast wake-up (<260µs) for display power sequencing. Use Value: Reduces bill-of-materials count versus discrete inductor-based inverters while meeting LCD contrast requirements. |
| GaAsFET Bias Supply | Battery-Operated Equipment |
Use Scenario: Providing stable negative gate bias for GaAs FET RF amplifiers in handheld radios or test equipment. IC Role / Device Role / Timing Role: Precision inverter with low output impedance (15Ω) ensuring minimal bias shift under RF modulation load transients. Use Value: Maintains amplifier linearity and gain stability without requiring oversized bulk capacitance or LDO post-regulation. | Use Scenario: Powering analog front-ends in portable medical sensors or wireless sensor nodes operating from single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Micropower inverter enabling >1-year battery life in sleep-mode applications via 0.002µA shutdown current. Use Value: Eliminates need for separate negative battery or charge-pump IC with higher quiescent draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting charge-pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1853EXT+T | 200kHz switching frequency, 350µA quiescent current (vs. 68µA), same 6-pin SC70 package | Better suited for ultra-compact layouts where smaller 0.68µF capacitors are preferred over 4.7µF | Select MAX1853EXT+T when minimizing capacitor footprint outweighs micropower priority |
| TPS60403DBVR | TI device with 2.5V–5.5V input, -1×VIN output, 60mA rating, 550kHz switching, SOT23-6 package | Higher output current and frequency but 90µA quiescent current and larger SOT23 footprint | Choose TPS60403DBVR when >30mA load or faster transient response is required |
Compared with MAX1852EXT+T, MAX1853EXT+T trades lower quiescent current for higher switching frequency and smaller external capacitors, while TPS60403DBVR offers higher output current and faster regulation at the cost of increased supply current and board area.
Availability
MAX1852EXT+T is available at Aetrix Electronics and suitable for battery-powered equipment, small LCD panel biasing, and GaAsFET bias supply applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for MAX1852EXT+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) designs precision analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.
The MAX1852/MAX1853 product line delivers ultra-compact, low-quiescent-current inverting charge pumps optimized for space- and power-constrained portable electronics requiring clean negative rails.
FAQ
What is the maximum continuous output current of the MAX1852EXT+T?
The MAX1852EXT+T delivers up to 30mA RMS continuous output current. This rating applies across the full operating temperature range (-40°C to +85°C) and input voltage range (+2.5V to +5.5V), with output voltage maintained within specification under load per the efficiency and output resistance curves in the MAX1852/MAX1853 datasheet.
Does the MAX1852EXT+T require external inductors?
No, the MAX1852EXT+T is a switched-capacitor inverter and requires no inductors. It operates using two external ceramic capacitors: a flying capacitor (C1, typically 4.7µF) and a reservoir capacitor (C2, same value), plus an optional input bypass capacitor (C3). This eliminates magnetic components and associated EMI concerns.
What is the shutdown current specification for the MAX1852EXT+T?
The MAX1852EXT+T draws only 0.002µA (2nA) typical shutdown supply current when SHDN is driven low. This ultra-low value enables multi-year battery life in always-connected IoT sensors and portable medical devices where standby power is critical.
Can the MAX1852EXT+T operate from a 3.3V input supply?
Yes, the MAX1852EXT+T supports input voltages from +2.5V to +5.5V, making it fully compatible with standard 3.3V logic rails. At VIN = +3.3V, it delivers approximately -3.3V output with <15Ω output resistance and maintains >98% efficiency at light loads, as confirmed in the Typical Operating Characteristics graphs.
What package type does the MAX1852EXT+T use, and how does it compare to SOT23?
The MAX1852EXT+T uses a 6-pin SC70 package measuring 1.3mm × 2.1mm - 40% smaller than standard SOT23-6. Its 0.65mm lead pitch and low profile (0.9mm max height) enable high-density PCB layouts in space-constrained applications such as wearables and handheld instruments.
MAX1852EXT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 30mA
- Frequency - Switching:
- 50kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
MAX1852EXT+T FAQ
1.How can I place an order for MAX1852EXT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1852EXT+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 MAX1852EXT+T reliable?
The price and inventory of MAX1852EXT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1852EXT+T is usually 5 days.
3.What payment methods are accepted for MAX1852EXT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1852EXT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1852EXT+T?
MAX1852EXT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1852EXT+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 MAX1852EXT+T?
For technical support, including MAX1852EXT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1852EXT+T requirements.
6.How does Aetrix verify that MAX1852EXT+T is sourced from the original manufacturer or authorized distributors?
All MAX1852EXT+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 MAX1852EXT+T meets industry standards.
7.What is the process for return or replacement of MAX1852EXT+T?
All MAX1852EXT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1852EXT+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 MAX1852EXT+T part is unused and in its original packaging.
Return procedure for MAX1852EXT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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