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Analog Devices Inc./Maxim Integrated MAX895LESA-T
- Part No.:
- MAX895LESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX895LESA-T.pdf
- Description:
- DUAL, HIGH-SIDE P-CH SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,230
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Product details
Overview
MAX895LESA-T from Maxim Integrated is a dual, high-side, P-channel MOSFET power switch with programmable current limiting (250mA per channel), thermal shutdown, and ultra-low quiescent current (16µA active, 0.1µA off). It operates from +2.7V to +5.5V and is used in PCMCIA and access bus slot load switching where precise current control and fault protection are required.
For engineers reviewing the MAX895LESA-T datasheet, MAX895LESA-T pinout, MAX895LESA-T application, or MAX895LESA-T equivalent, this device is selected for high-side load-switching in portable equipment requiring stable current limiting, thermal safety, and minimal supply current across temperature.
Technical Context
The MAX895LESA-T integrates two independent P-channel high-side switches, each with dedicated SET and ON inputs, enabling separate current-limit programming and control. Its internal current-limit amplifier compares voltage across external RSET to a 1.24V reference and regulates output current to ≤250mA per channel.
Thermal shutdown activates at +135°C junction temperature, cycling the switch off until die cools by 10°C. Short-circuit protection limits fault current to 1.5×ILIMIT, with fast-current-loop response time of 2µs and slow-loop response of 5µs - critical for transient overload handling without latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 250mA per channel - sets absolute upper bound for safe continuous load current |
| Input Voltage Range | +2.7V to +5.5V - supports both 3V and 5V system rails without level-shifting |
| Quiescent Current | 16µA at VIN = 3.3V - minimizes standby power in battery-powered portable systems |
| Off-Supply Current | 0.1µA - enables true zero-power disable state for long-term storage or deep sleep |
| On-Resistance | 300mΩ (typ) - determines I²R conduction loss and thermal rise under full load |
| Current-Limit Threshold | 1.24V reference - defines precision of external RSET-based current programming |
| Thermal Shutdown Temp | +135°C (junction) - protects die during sustained overload or poor PCB heat sinking |
Pinout & Package
The MAX895LESA-T is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (8.0mm × 3.5mm × 1.75mm height), gull-wing leads, and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | P-channel MOSFET drain (Switch A) | High-side output node; requires 0.1µF bypass capacitor to GND for EMI suppression |
| 2: OUT B | P-channel MOSFET drain (Switch B) | Independent high-side output; decoupled separately to prevent cross-talk |
| 3: SET A | Current-limit reference input (Switch A) | Connects to ground via RSETA to program 250mA limit using 1.24V reference |
| 4: ONA | Active-low enable (Switch A) | Logic low (≤0.8V) turns on Switch A; high-Z when inactive |
| 5: GND | Analog/digital ground reference | Common return path for all internal circuitry and external capacitors |
| 6: SET B | Current-limit reference input (Switch B) | Separate RSETB connection enables independent 250mA limit setting for Switch B |
| 7: IN | P-channel MOSFET source (common input) | Supplies both switches; requires 1µF ceramic bypass to minimize input droop during faults |
| 8: ONB | Active-low enable (Switch B) | Independent logic control; allows asynchronous switching of dual loads |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-side switches | Enables isolated control of two loads (e.g., PCMCIA VCC and VPP) without shared failure modes |
| Programmable 250mA current limit per channel | Allows precise ILIMIT tuning via external RSET while maintaining ±5% accuracy over temperature |
| 1.24V internal reference | Provides stable, temperature-compensated threshold for accurate current-setting resistor calculation |
| Thermal shutdown with hysteresis | Auto-recovers after 10°C cooldown, preventing permanent latch-off during intermittent overloads |
| Ultra-low off-state supply current | 0.1µA ensures negligible battery drain in always-off configurations (e.g., hot-swap slots) |
Applications
| PCMCIA Slot Power Control | Access Bus Slot Management |
|---|---|
Use Scenario: Hot-plug insertion of PCMCIA cards into laptops or industrial controllers. IC Role / Device Role / Timing Role: High-side power switch controlling VCC and VPP rails independently with current limiting. Use Value: Prevents bus voltage collapse and inrush damage during card insertion; 250mA limit matches PCMCIA Class A power budget. | Use Scenario: Enabling/disabling peripheral modules on ISA or LPC-based access buses. IC Role / Device Role / Timing Role: Dual-channel load switch providing sequenced power-up and fault-isolated shutdown. Use Value: Enables clean power gating without affecting host controller; thermal shutdown prevents module-level cascade failures. |
| Portable Medical Device Power Islands | Industrial Handheld Data Collector |
Use Scenario: Isolating sensor front-end and wireless transceiver subsystems in battery-powered diagnostic tools. IC Role / Device Role / Timing Role: High-side switch managing power domains with independent enable and current monitoring capability. Use Value: 16µA quiescent current extends battery life; programmable limit avoids tripping during sensor bias transients. | Use Scenario: Controlling barcode scanner and RFID reader modules in rugged handheld terminals. IC Role / Device Role / Timing Role: Dual-load switch delivering regulated 3.3V/5V power with short-circuit immunity. Use Value: Fast 2µs current-loop response prevents damage from cable shorts; SO package fits compact 2-layer PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side P-channel load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS22965DSGR | Single-channel, 2A max, integrated 65mΩ FET, no external current limit; fixed 1.2V UVLO | Higher current capacity but lacks dual independent channels and programmable current limiting | Select when higher single-load current and lower RON are prioritized over dual-channel programmability |
| AP22653AW-7 | Dual-channel, 2.1A max per channel, integrated current sense, 1.7V–5.5V range, no thermal shutdown | Wider input range and higher current, but missing thermal protection and precise 1.24V reference | Choose for wider VIN range and higher load current where thermal margin is managed externally |
Compared with TPS22965DSGR and AP22653AW-7, the MAX895LESA-T uniquely delivers dual independent 250mA current-limited high-side switches with thermal shutdown, 1.24V precision reference, and sub-µA off-state current - making it optimal for space-constrained, battery-sensitive, dual-rail applications requiring deterministic fault behavior.
Availability
MAX895LESA-T is available at Aetrix Electronics and suitable for PCMCIA slot management, access bus power control, and portable medical device power islands requiring stable component supply, guaranteed long-term sourcing, and traceable manufacturing history.
Supply support for MAX895LESA-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, automotive, and computing applications.
The MAX894L/MAX895L product line was engineered specifically for high-reliability, current-limited high-side load switching in portable and hot-swap systems - emphasizing low quiescent power, thermal safety, and dual independent control.
FAQ
What is the maximum continuous current rating for each channel of the MAX895LESA-T?
The MAX895LESA-T is rated for a maximum continuous output current of 250mA per channel. This value is the factory-programmed IMAX limit for the MAX895L variant and remains constant regardless of input voltage within the +2.7V to +5.5V operating range. Actual usable current depends on external RSET selection and thermal conditions, with recommended operation between 0.2×IMAX and IMAX for stability.
How does the MAX895LESA-T implement current limiting, and what components are required?
The MAX895LESA-T uses an internal 1.24V reference and current-limit amplifier to regulate output current. For each channel, a resistor (RSETA or RSETB) must be connected from the corresponding SET pin to GND. The relationship is RSET = (1.24V × IRATIO) / ILIMIT, where IRATIO = 1050A/A for MAX895LESA-T. No additional op-amps or external sensing elements are needed - the chip performs closed-loop regulation autonomously.
Does the MAX895LESA-T support bidirectional current flow, and what is its voltage polarity requirement?
No, the MAX895LESA-T does not support bidirectional current flow. It is a unidirectional high-side P-channel MOSFET switch requiring the input voltage (IN) to be strictly greater than the output voltage (OUT A or OUT B) at all times. Reverse voltage or back-driving the outputs can damage the internal structure. This architecture ensures safe power delivery only from source to load - consistent with PCMCIA and access bus slot requirements.
What is the thermal shutdown behavior of the MAX895LESA-T during sustained overload?
When the MAX895LESA-T junction temperature exceeds +135°C, the device disables both switches and enters thermal shutdown. It remains off until the die cools by at least 10°C, then automatically resumes normal operation. If the overload persists, the MAX895LESA-T cycles on/off - producing a pulsed output - which prevents permanent damage while signaling a system-level thermal fault condition that requires design review or heatsinking improvement.
Can the MAX895LESA-T be used with input voltages below 2.7V, such as 2.5V logic rails?
No, the MAX895LESA-T is not specified or guaranteed for operation below +2.7V. Its absolute minimum supply voltage is +2.7V, and undervoltage lockout activates below approximately 2.0V (min) to prevent erratic behavior. Attempting to operate at 2.5V may result in incomplete turn-on, increased RON, unstable current limiting, or failure to meet timing specs like 2µs fast-loop response. For 2.5V systems, consider alternatives explicitly rated down to that rail.
MAX895LESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 2
- Ratio - Input:Output:
- 1:2
- Output Configuration:
- High Side
- Output Type:
- P-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 250mA
- Rds On (Typ):
- 250mOhm
- Input Type:
- Non-Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, Short Circuit, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX895LESA-T FAQ
1.How can I place an order for MAX895LESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX895LESA-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 MAX895LESA-T reliable?
The price and inventory of MAX895LESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX895LESA-T is usually 5 days.
3.What payment methods are accepted for MAX895LESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX895LESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX895LESA-T?
MAX895LESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX895LESA-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 MAX895LESA-T?
For technical support, including MAX895LESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX895LESA-T requirements.
6.How does Aetrix verify that MAX895LESA-T is sourced from the original manufacturer or authorized distributors?
All MAX895LESA-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 MAX895LESA-T meets industry standards.
7.What is the process for return or replacement of MAX895LESA-T?
All MAX895LESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX895LESA-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 MAX895LESA-T part is unused and in its original packaging.
Return procedure for MAX895LESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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