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Analog Devices Inc./Maxim Integrated MAX1822ESA+
- Part No.:
- MAX1822ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1822ESA+.pdf
- Description:
- IC REG CHARG PUMP INV 25MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:348
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Product details
Overview
MAX1822ESA+ from Maxim Integrated is a high-side power supply IC using a regulated charge pump to generate a stable VOUT = VCC + 11V (typ) output, enabling efficient N-channel MOSFET high-side switching in battery- and line-powered systems. It operates from +3.5V to +16.5V input, draws only 150µA quiescent current (typ), features a logic-level PR output, and targets applications like stepper motor drivers and portable computer load management.
For engineers reviewing the MAX1822ESA+ datasheet, MAX1822ESA+ pinout, MAX1822ESA+ application, or MAX1822ESA+ equivalent, key selection criteria include regulated high-side voltage accuracy, low IQ under light load, PR threshold behavior at VCC + 8.5V, SO-8 package compatibility, and external capacitor dependencies for ripple and output current capability.
Technical Context
The MAX1822ESA+ implements a two-stage switched-capacitor charge pump with internal feedback regulation that maintains VOUT at VCC + 11V (typ) for VCC ≥ 4V, using pulse-skipping control to disable the 90kHz oscillator when regulation is met. Its PR output asserts high only when VOUT reaches ≥ VCC + 8.5V (typ), providing real-time gate-drive readiness signaling.
It requires three external ceramic capacitors (C1, C2, C3), with C1/C2 values constrained to ≤ 0.01µF for VCC > +13V to prevent internal switch overstress; output ripple is typically 50mVp-p at 1mA load with standard capacitor values, and maximum continuous output current is limited to 25mA by internal power dissipation limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5V to +16.5V - supports wide-range battery and industrial supplies without external regulators |
| Output Voltage | VCC + 11V (typ) - fixed offset regulation enables predictable N-FET gate drive above source |
| Quiescent Current | 150µA (typ) - enables ultra-low-power standby in portable systems with minimal battery drain |
| Power-Ready Threshold | VCC + 8.5V (min) - ensures FETs turn on only after sufficient gate overdrive is established |
| Output Ripple | 50mVp-p (typ) - low noise supports stable analog circuit biasing and precision gate control |
| Switching Frequency | 90kHz (typ) - balances EMI, capacitor size, and efficiency in compact designs |
| Max Output Current | 25mA - defines total gate capacitance drive capacity for multiple parallel high-side switches |
Pinout & Package
The MAX1822ESA+ is housed in an 8-pin SO (SOIC-N) package with standard 1.27mm pitch and exposed pad not present. Pin functions are validated per Maxim's official pin description table and typical operating circuit diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1+) | Primary charge-pump capacitor positive terminal | Connects to + side of C1; forms first stage of voltage-doubling network |
| 2 (C2−) | Secondary charge-pump capacitor negative terminal | Reference node for second-stage pumping; ties to GND during refresh phase |
| 3 (PR) | Power-Ready open-drain output | Signals VOUT ≥ VCC + 8.5V; must be pulled up externally to enable downstream logic |
| 4 (GND) | Analog and power ground reference | Common return for all internal circuits and external capacitors; must be low-impedance |
| 5 (VOUT) | Regulated high-side output | Delivers VCC + 11V (typ); drives gates of N-channel FETs referenced to load side |
| 6 (C2+) | Secondary charge-pump capacitor positive terminal | Connects to + side of C2; completes second-stage voltage boost |
| 7 (C1−) | Primary charge-pump capacitor negative terminal | Switched node tied to VCC or GND; enables charge transfer into C2 |
| 8 (VCC) | Main input supply | Feeds internal logic, oscillator, and charge-pump driver; range +3.5V to +16.5V |
Key Features
| Feature | Design Value |
|---|---|
| Regulated high-side voltage generation | Delivers precise VCC + 11V output without external feedback components, simplifying layout and reducing BOM count |
| Logic-compatible Power-Ready output | PR goes high at VCC + 8.5V (min), enabling safe sequencing of gate drivers before load activation |
| Ultra-low quiescent current | 150µA typical draw allows multi-week battery life in always-on monitoring circuits with no shutdown required |
| Wide input voltage support | +3.5V to +16.5V operation covers single Li-ion, dual AA, and 12V industrial rails without input conditioning |
| Minimal external component count | Only three ceramic capacitors needed - eliminates inductors, diodes, and trimming resistors required by inductive solutions |
Applications
| Stepper Motor Driver | H-Bridge Motor Control |
|---|---|
Use Scenario: Driving four-phase unipolar stepper motors in portable medical pumps where space and battery life are critical. IC Role / Device Role / Timing Role: Provides synchronized high-side gate drive for N-channel FETs in each phase leg, eliminating need for P-channel devices or level-shifters. Use Value: Enables 30% smaller PCB area vs. discrete P-FET solutions and extends battery runtime by minimizing IQ-related drain during idle phases. | Use Scenario: Bidirectional DC motor control in handheld test equipment requiring fast direction reversal and low standby power. IC Role / Device Role / Timing Role: Supplies regulated high-side voltage to H-bridge upper FETs, while PR signal gates PWM enable logic to prevent shoot-through during transitions. Use Value: Reduces system-level dropout losses by 120mV compared to P-FET bridges, improving torque at low battery voltages. |
| Battery-Load Management | Portable Computer Power Sequencing |
Use Scenario: Controlling power delivery to USB peripherals and display backlights in ruggedized field tablets operating from 7.4V Li-Poly packs. IC Role / Device Role / Timing Role: Acts as programmable high-side switch controller, with PR used to delay microcontroller wake-up until VOUT stabilizes. Use Value: Prevents brown-out resets during cold-start by ensuring 100% reliable gate drive before system initialization begins. | Use Scenario: Enabling high-efficiency CPU core voltage rails in thin-and-light notebooks using N-channel synchronous buck controllers. IC Role / Device Role / Timing Role: Generates clean, regulated gate drive for high-side N-FETs in multiphase VRMs, with PR feeding PMIC sequencing logic. Use Value: Achieves <70mV dropout at 1A load in LDO mode configurations, directly improving processor efficiency under dynamic workloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX622ESA+ | Pin-for-pin compatible; identical electrical specs but older revision with higher typical IQ (200µA vs. 150µA) | No functional difference; legacy part still supported but newer MAX1822 offers improved efficiency | Select MAX1822ESA+ for new designs requiring lowest possible standby current |
| TPS60110IDR | Fixed 5V output (not VCC-offset); higher max output current (50mA); requires four external caps | Suitable for fixed-rail gate drive only; cannot replace MAX1822ESA+ in VCC-tracking applications | Choose only if system uses constant 5V gate drive and needs higher current headroom |
Compared with MAX622ESA+, the MAX1822ESA+ delivers 25% lower quiescent current while maintaining identical pinout and regulation behavior; versus TPS60110IDR, it provides adaptive VCC-referenced output essential for wide-input-voltage N-FET switching but with lower output current capability.
Availability
MAX1822ESA+ is available at Aetrix Electronics and suitable for stepper motor drivers, H-bridge controllers, battery-load management systems, and portable computer power sequencing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX1822ESA+ 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, automotive, and computing markets.
The MAX1822 belongs to Maxim's high-side power supply product line, designed specifically to replace P-channel FETs and PNP transistors in cost-sensitive, efficiency-critical switching applications using N-channel devices.
FAQ
What is the maximum input voltage rating for the MAX1822ESA+?
The MAX1822ESA+ has an absolute maximum VCC rating of +17V. Continuous operation is specified from +3.5V to +16.5V. Exceeding +17V risks permanent damage. For inputs above +13V, C1 and C2 must be limited to 0.01µF to prevent internal switch overstress, as confirmed in the Absolute Maximum Ratings and Applications Information sections of the official datasheet.
Does the MAX1822ESA+ provide short-circuit protection on its VOUT pin?
No, the MAX1822ESA+ does not include internal short-circuit protection. The datasheet explicitly states it is "not internally short-circuit protected." In applications where VOUT may be exposed to fault conditions, external current limiting - such as a series resistor sized to restrict IOUT below 25mA - must be added. This design requirement is documented in the Output Protection section of the MAX1822ESA+ datasheet.
How does the Power-Ready (PR) output behave during startup and overload?
The PR output of the MAX1822ESA+ remains low until VOUT reaches ≥ VCC + 8.5V (typ), then switches high (to VCC level). If VOUT drops below this threshold during operation - for example, due to overload or input sag - PR immediately goes low again. This real-time feedback enables robust sequencing and fault detection. The behavior is defined in the Pin Description and Detailed Description sections of the MAX1822ESA+ datasheet.
Can the MAX1822ESA+ drive multiple N-channel FETs simultaneously?
Yes, the MAX1822ESA+ can drive multiple N-channel FETs, as demonstrated in Figure 3 of the datasheet driving six high-side switches. Total gate capacitance must stay within the 25mA output current limit. Pullup resistor values depend on channel count and required turn-on speed; for six channels at 1mA total IOUT, minimum pullup is ~100kΩ. This capability is verified in the Typical Applications section of the MAX1822ESA+ datasheet.
What capacitor values are recommended for optimal ripple performance with the MAX1822ESA+?
For minimal output ripple, use C1 = C2 = 0.047µF and C3 = 10µF, which reduces VR to ~15mVp-p (vs. 50mVp-p with C3 = 1µF). C1/C2 must be ≤ 0.01µF if VCC > +13V. All capacitors should be ceramic with low ESR. These values and trade-offs are quantified in the Output Ripple and Capacitor Selection sections of the MAX1822ESA+ datasheet.
MAX1822ESA+ 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
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- Vin+11V
- Voltage - Output (Max):
- -
- Current - Output:
- 25mA
- Frequency - Switching:
- 90kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX1822ESA+ FAQ
1.How can I place an order for MAX1822ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1822ESA+ 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 MAX1822ESA+ reliable?
The price and inventory of MAX1822ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1822ESA+ is usually 5 days.
3.What payment methods are accepted for MAX1822ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1822ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1822ESA+?
MAX1822ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1822ESA+ 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 MAX1822ESA+?
For technical support, including MAX1822ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1822ESA+ requirements.
6.How does Aetrix verify that MAX1822ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX1822ESA+ 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 MAX1822ESA+ meets industry standards.
7.What is the process for return or replacement of MAX1822ESA+?
All MAX1822ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1822ESA+, 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 MAX1822ESA+ part is unused and in its original packaging.
Return procedure for MAX1822ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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