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Analog Devices Inc./Maxim Integrated MAX1598EZK28-T
- Part No.:
- MAX1598EZK28-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1598EZK28-T.pdf
- Description:
- IC REG LINEAR 200MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX1598EZK28-T from Maxim Integrated is a low-noise, low-dropout linear regulator with 2.80V preset output, 200mA output current capability, 30µVRMS output noise, 236mV dropout at 200mA, and 100µA operating supply current independent of load or dropout condition. It serves as a primary voltage regulator in battery-powered portable electronics requiring stable, clean power under varying load and input conditions.
For engineers reviewing the MAX1598EZK28-T datasheet, MAX1598EZK28-T pinout, MAX1598EZK28-T application, or MAX1598EZK28-T equivalent, key selection criteria include its fixed 2.80V output, thin SOT23-5 package, autodischarge shutdown (10nA), reverse battery protection, and thermal/short-circuit safety features - all critical for space-constrained, safety-sensitive handheld systems.
Technical Context
The MAX1598EZK28-T implements a P-channel MOSFET pass transistor with 1.1Ω typical RDS(ON), enabling low dropout and eliminating base-drive current loss. Its internal 1.25V bandgap reference feeds an error amplifier that controls the pass gate via internal feedback, delivering precise regulation without external resistors.
It integrates dedicated circuitry for reverse battery protection (limits reverse current to 1mA), thermal shutdown at +155°C with 15°C hysteresis, and active autodischarge through a 300Ω internal discharge path when SHDN is asserted - ensuring rapid, controlled output collapse during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.80V ±3% over -40°C to +85°C - eliminates external resistor network, reduces BOM count and layout area. |
| Max Output Current | 200mA continuous - supports moderate-power RF front-ends, microcontrollers, and analog sensors in portable devices. |
| Dropout Voltage | 236mV at 200mA - enables operation down to ~3.04V input with 2.80V output, extending usable battery life in single-cell Li-ion or alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets stringent noise requirements for RF receivers, ADC references, and low-jitter clock supplies. |
| Quiescent Current | 100µA across full load and dropout range - ensures minimal standby drain, critical for long-term battery operation in always-on subsystems. |
| Shutdown Current | 10nA logic-controlled shutdown - reduces system-level leakage to negligible levels during deep sleep modes. |
| Thermal Protection | Shuts down at +155°C with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX1598EZK28-T is housed in a thin 5-pin SOT23 package (JEDEC MO-178AA), optimized for low profile and thermal performance. The GND pin serves dual electrical and thermal functions - requires soldering to a large copper pour or ground plane for effective heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression. |
| 2 - GND | Power and thermal ground | Primary return path and heatsink; must connect to large PCB copper area to maintain TJ < +150°C at full load. |
| 3 - SHDN | Active-low enable/shutdown control | Pull low to enter 10nA shutdown with autodischarge; pull high (≥2.0V) or tie to IN for normal operation. |
| 4 - BP | Bypass capacitor connection for noise reduction | Connects to internal 200kΩ resistor forming 80Hz low-pass filter; 0.01µF ceramic cap reduces output noise to 30µVRMS. |
| 5 - OUT | Regulated output | Delivers up to 200mA; requires ≥2.2µF ceramic cap (ESR < 0.2Ω) for stability and transient response across temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Autodischarge function | 300Ω internal discharge path actively pulls OUT to GND in shutdown - eliminates need for external bleed resistor in battery-critical designs. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN falls below GND - prevents damage and data corruption during incorrect battery insertion. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) eliminates base-drive losses - maintains 100µA quiescent current regardless of load or dropout state. |
| Low-noise BP filtering | Integrated 200kΩ resistor + external 0.01µF BP cap forms factory-tuned 80Hz filter - achieves 30µVRMS noise without complex external compensation. |
| Thermal shutdown with hysteresis | +155°C trip with +15°C hysteresis - provides safe, self-recovering fault handling during sustained overload without latch-up. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering baseband processor core voltage and RF transceiver bias rails in GSM/CDMA handsets with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary LDO regulator delivering clean, stable 2.80V to noise-sensitive analog and mixed-signal blocks. Use Value: 30µVRMS noise and 236mV dropout extend talk time by >12% vs. higher-dropout alternatives while preserving signal integrity in receiver front-end. |
Use Scenario: Providing regulated 2.80V supply to PCMCIA card controller ICs and interface buffers in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card logic from noisy host bus power and enabling hot-swap compatibility. Use Value: Reverse battery protection prevents damage during accidental misinsertion; 10nA shutdown enables zero-power card ejection detection. |
| Hand-Held Instruments | Palmtop Computers |
|
Use Scenario: Supplying precision ADC reference and sensor signal chain in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise voltage source for analog front-end, decoupling measurement circuitry from main system rail. Use Value: 30µVRMS output noise directly translates to <0.01% measurement error floor - meeting Class II accuracy requirements. |
Use Scenario: Regulating 2.80V for CPU I/O and memory interface in early-generation palmtop PCs with tight board space. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO replacing bulkier regulators in ultra-thin clamshell form factors. Use Value: Thin SOT23-5 footprint and GND-as-heatsink design allow placement directly under processor - reducing thermal resistance by 40% vs. SO-8 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328DBVR | 2.8V output, 150mA max, 35µVRMS noise, 220mV dropout at 150mA, SOT23-5 package | Lower current rating and slightly higher noise; lacks reverse battery protection and autodischarge | Choose when cost sensitivity outweighs 50mA headroom and safety features; verify thermal margin at full load. |
| MCP1700T-2802E/TT | 2.8V output, 250mA max, 30µVRMS noise, 600mV dropout at 250mA, SOT23-5 package | Higher dropout limits usable battery range; no reverse battery protection or BP noise filter | Consider only if input voltage remains ≥3.4V; requires external discharge circuit for shutdown behavior. |
Compared with TPS76328DBVR and MCP1700T-2802E/TT, the MAX1598EZK28-T uniquely combines 200mA capability, ultra-low 236mV dropout, integrated reverse-battery safety, and factory-optimized BP noise filtering - making it the only option qualified for high-reliability, battery-endurance-critical handheld designs where all four attributes are mandatory.
Availability
MAX1598EZK28-T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, and hand-held instruments requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1598EZK28-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 demanding applications.
The MAX1598 series was designed specifically for battery-powered portable electronics requiring ultra-low noise, low dropout, and robust fault protection - targeting cellular phones, PDAs, and handheld test equipment where reliability and efficiency are non-negotiable.
FAQ
What is the exact output voltage tolerance of the MAX1598EZK28-T over temperature?
The MAX1598EZK28-T has a guaranteed output voltage tolerance of –3% to +2% over the full operating temperature range of –40°C to +85°C. At +25°C, typical accuracy is ±1.4%, and the device maintains this tight regulation using an internal 1.25V bandgap reference and precision feedback divider - no external components required for adjustment.
Does the MAX1598EZK28-T require an external bypass capacitor on the BP pin, and what value is recommended?
Yes, the MAX1598EZK28-T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. This capacitor works with an internal 200kΩ resistor to form an 80Hz low-pass filter. Values above 0.1µF increase startup time without improving noise performance and are not recommended per the datasheet.
How does the autodischarge function operate in the MAX1598EZK28-T during shutdown?
When the SHDN pin is pulled low, the MAX1598EZK28-T activates an internal 300Ω discharge path from OUT to GND, actively pulling the output voltage to ground within microseconds. This eliminates residual voltage that could cause unintended wake-up or latch-up in downstream circuitry - removing the need for external discharge resistors in battery-sensitive designs.
Can the MAX1598EZK28-T be used with input voltages below 2.5V?
No, the MAX1598EZK28-T has a minimum input voltage specification of 2.5V. Operation below this level is outside absolute maximum ratings and may result in unregulated output, increased noise, or failure to maintain regulation. For sub-2.5V inputs, consider alternative LDOs explicitly rated for lower VIN, such as the MAX1726 series.
What thermal derating applies to the MAX1598EZK28-T in the thin SOT23-5 package?
In the thin SOT23-5 package, the MAX1598EZK28-T has a continuous power dissipation limit of 727mW at +70°C ambient, derating at 9.1mW/°C above that temperature. Effective thermal performance depends critically on GND pad soldering to a large copper area - insufficient copper can reduce practical power handling by >50% due to elevated junction temperature.
MAX1598EZK28-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.236V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX1598EZK28-T FAQ
1.How can I place an order for MAX1598EZK28-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1598EZK28-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 MAX1598EZK28-T reliable?
The price and inventory of MAX1598EZK28-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1598EZK28-T is usually 5 days.
3.What payment methods are accepted for MAX1598EZK28-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1598EZK28-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1598EZK28-T?
MAX1598EZK28-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1598EZK28-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 MAX1598EZK28-T?
For technical support, including MAX1598EZK28-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1598EZK28-T requirements.
6.How does Aetrix verify that MAX1598EZK28-T is sourced from the original manufacturer or authorized distributors?
All MAX1598EZK28-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 MAX1598EZK28-T meets industry standards.
7.What is the process for return or replacement of MAX1598EZK28-T?
All MAX1598EZK28-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1598EZK28-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 MAX1598EZK28-T part is unused and in its original packaging.
Return procedure for MAX1598EZK28-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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