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Analog Devices Inc./Maxim Integrated MAX1822ESA+T
- Part No.:
- MAX1822ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1822ESA+T.pdf
- Description:
- IC REG CHARG PUMP INV 25MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,486
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Product details
Overview
The MAX1822ESA+T 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 gate drive in high-side switching circuits across +3.5V to +16.5V input supplies. It features 150µA typical quiescent current, integrated Power-Ready (PR) output, and supports up to 25mA load current for battery-load management, stepper motor drivers, and low-dropout regulator auxiliary supplies.
For engineers reviewing the MAX1822ESA+T datasheet, MAX1822ESA+T pinout, MAX1822ESA+T application, or MAX1822ESA+T equivalent, key selection criteria include regulated high-side voltage offset, PR threshold accuracy (12–14.5V), SO-8 package compatibility, external capacitor requirements (C1/C2 = 0.01–0.047µF, C3 = 1–10µF), and absence of internal short-circuit protection requiring external current limiting.
Technical Context
The MAX1822ESA+T implements a two-stage switched-capacitor charge pump with internal feedback regulation that maintains VOUT at VCC + 11V (typ) for VCC ≥ 4V, pulse-skipping to reduce IQ when regulation is met. Its oscillator operates at 90kHz (typ), with frequency varying under load and input conditions.
Power-Ready (PR) logic-level output asserts high when VOUT reaches ≥ VCC + 8.5V (min), providing real-time gate-drive readiness indication; PR retracts low during overload or startup until regulation is established. The device lacks internal short-circuit protection and requires external current-limiting resistors if VOUT is exposed to fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +3.5V to +16.5V - supports wide-range battery and line-powered systems without external regulators. |
| Output Voltage | VCC + 11V (typ), ±1.5V tolerance - delivers precise gate-drive headroom for N-channel FETs independent of input rail. |
| Quiescent Current | 150µA (typ) at VCC = 5V - enables ultra-low-power operation in always-on control circuits. |
| Max Output Current | 25mA continuous - sufficient to drive multiple high-side switch gates or op-amp bias networks. |
| Power-Ready Threshold | VCC + 12V to +14.5V - ensures reliable FET turn-on only after stable high-side voltage is achieved. |
| Output Ripple | 50mVp-p (typ) with C1/C2 = 0.047µF, C3 = 1µF - low noise suitable for sensitive analog gate-bias applications. |
| Operating Temp | –40°C to +85°C - qualified for industrial and portable computing environments. |
Pinout & Package
MAX1822ESA+T 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 top-view schematic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1+) | Primary charge-pump capacitor positive terminal | Connects to + side of C1; critical for first-stage charge transfer efficiency and ripple control. |
| 2 (C2−) | Secondary charge-pump capacitor negative terminal | Reference node for second-stage pumping; ties to GND or intermediate node depending on topology. |
| 3 (PR) | Power-Ready open-drain output | Signals external logic when VOUT ≥ VCC + 8.5V; requires pull-up resistor for active-high interface. |
| 4 (GND) | Analog and power ground reference | Common return for all internal circuitry and external capacitors; must be low-impedance. |
| 5 (VOUT) | Regulated high-side output voltage | Delivers VCC + 11V (typ); drives N-FET gates or LDO bias networks; not internally short-circuit protected. |
| 6 (C2+) | Secondary charge-pump capacitor positive terminal | Connects to + side of C2; completes second-stage charge transfer path to VOUT. |
| 7 (C1−) | Primary charge-pump capacitor negative terminal | Connects to VCC or GND depending on configuration; defines first-stage pumping polarity. |
| 8 (VCC) | Main input supply voltage | Accepts +3.5V to +16.5V; powers internal logic and oscillator; determines VOUT offset baseline. |
Key Features
| Feature | Design Value |
|---|---|
| Regulated high-side generation | VOUT precisely regulated to VCC + 11V (typ), eliminating need for P-channel FETs or PNP transistors in high-side switches. |
| Low-quiescent-current operation | 150µA typical IQ enables multi-day battery life in portable computers and battery-load management systems. |
| Integrated Power-Ready indicator | PR output asserts only when VOUT reaches ≥ VCC + 8.5V, preventing premature FET turn-on and gate oxide stress. |
| External capacitor flexibility | Supports C1/C2 values from 0.01µF to 0.047µF and C3 up to 10µF - allows ripple vs. size trade-off optimization. |
| Wide input voltage range | +3.5V to +16.5V operation accommodates single-cell Li-ion (3.6V), dual-cell alkaline (3V), and 12V industrial rails. |
Applications
| High-Side Power Control with N-Channel FETs | Stepper Motor Drivers |
|---|---|
|
Use Scenario: Driving four N-channel MOSFETs in a 4-channel load-switch configuration without pull-up resistors, using MAX333 analog switches to sequence activation. IC Role / Device Role / Timing Role: MAX1822ESA+T provides regulated high-side gate voltage (VCC + 11V) to ensure full enhancement of IRF541 FETs during switching transitions. Use Value: Enables compact, low-component-count high-side switching with <150µA standby current and no external level-shifters. |
Use Scenario: Supplying gate drive for H-bridge motor driver using DG303 analog switches and IRF541 FETs in portable medical or robotics equipment. IC Role / Device Role / Timing Role: MAX1822ESA+T generates stable VOUT to bias upper-leg FETs, while PR output synchronizes enable timing with voltage stabilization. Use Value: Eliminates P-channel devices, reducing conduction loss by >30% and improving thermal performance in space-constrained motor modules. |
| Low-Dropout Voltage Regulators | Battery-Load Management |
|
Use Scenario: Biasing LM10 op-amp and reference in ultra-low-dropout linear regulator delivering <20mV dropout at 1A with SMP60N06 FET. IC Role / Device Role / Timing Role: MAX1822ESA+T supplies clean, regulated VOUT to op-amp non-inverting input and FET gate, enabling sub-70mV dropout at full load. Use Value: Achieves 99.3% efficiency at 1A/5V output versus traditional PNP-based LDOs, extending battery runtime in portable instrumentation. |
Use Scenario: Controlling power distribution to subsystems (e.g., display, sensor array, RF module) in handheld computers with dynamic load sequencing. IC Role / Device Role / Timing Role: MAX1822ESA+T powers high-side switches whose turn-on is gated by PR signal, ensuring safe power-up order and fault isolation. Use Value: Reduces system-level BOM count by 4–6 discrete components per channel and cuts standby power by >5× versus discrete PNP solutions. |
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 VOUT = VCC + 11V regulation but higher 250µA typical IQ and narrower 4.5V–13.2V input range. | Limited to mid-rail applications; unsuitable for 3.5V battery start-up or 16.5V industrial inputs. | Select MAX622ESA+ only when existing layout uses it and input stays within 4.5–13.2V; otherwise MAX1822ESA+T offers broader range and lower IQ. |
| LM27762DSGR | Single-supply inverting charge pump (VOUT = –VCC); no high-side generation capability; includes internal regulation and 200mA output. | Cannot replace MAX1822ESA+T in high-side gate-drive roles; only viable for negative bias or dual-rail generation where polarity matches. | LM27762DSGR is not a functional alternative for high-side N-FET drive; use only in complementary negative-voltage applications. |
Compared with MAX622ESA+, the MAX1822ESA+T extends usable input range by 3.5V at low end and 3.3V at high end while cutting quiescent current by 40%, making it superior for battery-backed and wide-input industrial designs; LM27762DSGR serves a fundamentally different voltage polarity function and cannot substitute in high-side configurations.
Availability
MAX1822ESA+T is available at Aetrix Electronics and suitable for high-side power control with N-channel FETs, stepper motor drivers, and battery-load management requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1822ESA+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, computing, and portable applications.
The MAX1822ESA+T belongs to Maxim's high-efficiency charge-pump power supply product line, engineered specifically to replace P-channel FETs and PNP transistors in high-side switching circuits while minimizing quiescent power and external component count.
FAQ
What is the regulated output voltage of the MAX1822ESA+T?
The MAX1822ESA+T regulates its output voltage to VCC + 11V (typ), with measured values ranging from 11.5V to 29.5V depending on input voltage and load. At VCC = 5V, VOUT is typically 15.5V; at VCC = 16.5V, it reaches 27.5V. This fixed offset enables consistent N-channel FET gate overdrive across wide input ranges, and the regulation holds within ±1.5V over temperature and load.
Does the MAX1822ESA+T provide internal short-circuit protection?
No, the MAX1822ESA+T does not include internal short-circuit protection. Its absolute maximum output current is 25mA, and exceeding this-such as during VOUT-to-GND faults-can damage the device. Designers must add an external current-limiting resistor between VOUT and the load, sized using R ≥ (VOUT × number of channels) / 25mA, as specified in the MAX1822ESA+T datasheet.
How does the Power-Ready (PR) output function in the MAX1822ESA+T?
The PR output of the MAX1822ESA+T is an open-drain signal that goes high when VOUT reaches ≥ VCC + 8.5V (min), indicating stable high-side voltage is available. It remains high during normal operation and pulls low if VOUT drops below this threshold due to overload or input sag. PR requires an external pull-up resistor and is used to enable downstream FETs or logic only after safe gate drive levels are confirmed.
What capacitor values are required for stable operation of the MAX1822ESA+T?
The MAX1822ESA+T requires three external capacitors: C1 and C2 (charge-pump flying caps) and C3 (output reservoir). For VCC ≤ 13V, C1 and C2 may be 0.047µF ceramic; above 13V, they must be ≤ 0.01µF to prevent internal switch overstress. C3 ranges from 1µF to 10µF-larger values reduce ripple (e.g., 10µF yields ~15mVp-p) but increase turn-on time. All capacitors should be low-ESR ceramic types.
Is the MAX1822ESA+T pin-compatible with any other Maxim devices?
Yes, the MAX1822ESA+T is explicitly specified as a pin-for-pin replacement for the MAX622. Both share identical SO-8 pinout, VOUT = VCC + 11V regulation, PR functionality, and external capacitor requirements. However, MAX1822ESA+T extends the input range to +3.5V–+16.5V and reduces typical quiescent current from 250µA to 150µA, offering direct upgrade path in legacy MAX622 designs.
MAX1822ESA+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
- 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+T FAQ
1.How can I place an order for MAX1822ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1822ESA+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 MAX1822ESA+T reliable?
The price and inventory of MAX1822ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1822ESA+T is usually 5 days.
3.What payment methods are accepted for MAX1822ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1822ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1822ESA+T?
MAX1822ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1822ESA+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 MAX1822ESA+T?
For technical support, including MAX1822ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1822ESA+T requirements.
6.How does Aetrix verify that MAX1822ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX1822ESA+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 MAX1822ESA+T meets industry standards.
7.What is the process for return or replacement of MAX1822ESA+T?
All MAX1822ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1822ESA+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 MAX1822ESA+T part is unused and in its original packaging.
Return procedure for MAX1822ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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