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Analog Devices Inc./Maxim Integrated MAX1598EZK33
- Part No.:
- MAX1598EZK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1598EZK33.pdf
- Description:
- IC REG LINEAR 200MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,439
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Product details
Overview
MAX1598EZK33 from Maxim Integrated is a low-noise, low-dropout linear regulator with 3.3V preset output, 200mA output current capability, 30µVRMS output noise, and 236mV dropout at full load. It operates from 2.5V to 6.5V input and features internal P-channel MOSFET pass transistor, 10nA shutdown current, and autodischarge function - designed for battery-powered portable electronics requiring stable, clean power.
For engineers reviewing the MAX1598EZK33 datasheet, MAX1598EZK33 pinout, MAX1598EZK33 application, or MAX1598EZK33 equivalent, this page delivers verified electrical parameters, thermal protection behavior, BP-capacitor–dependent noise performance, and SOT23-5 package integration guidance - all specific to the 3.3V factory-preset variant.
Technical Context
The MAX1598EZK33 implements a 1.25V bandgap reference and error amplifier driving an internal 1.1Ω P-channel MOSFET pass transistor, enabling ultra-low quiescent current (100µA) independent of load or dropout condition. Its BP pin connects to a 200kΩ internal resistor forming an 80Hz low-pass filter with external 0.01µF capacitor, directly reducing reference noise contribution to output.
Thermal shutdown activates at +155°C with 15°C hysteresis, and reverse battery protection limits reverse current to 1mA when VIN or SHDN falls below ground. The autodischarge circuit actively pulls OUT to GND during shutdown via a 300Ω internal discharge path - a feature confirmed for MAX1598EZK33 in the functional description and electrical characteristics table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% over -40°C to +85°C - no external resistors required; enables single-component voltage rail generation. |
| Max Output Current | 200mA continuous - sufficient for baseband processors, RF front-ends, and analog sensor subsystems in handheld devices. |
| Dropout Voltage | 236mV at 200mA - allows operation down to ~3.536V input when powering 3.3V logic, extending usable battery life. |
| Output Noise | 30µVRMS (10Hz–100kHz) with CBP = 0.01µF - meets stringent noise requirements for ADC references and RF synthesizers. |
| Quiescent Current | 100µA across full load and dropout range - ensures minimal battery drain during active operation, even under light loads. |
| Shutdown Current | 10nA typical - reduces system standby power to negligible levels; supports long-term battery storage without significant depletion. |
| Thermal Shutdown | Triggers at +155°C with 15°C hysteresis - provides robust fault protection during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX1598EZK33 is housed in a thin 5-pin SOT23 package (JEDEC MO-178AA), with exposed pad not electrically connected - GND pin serves as primary thermal path and must be soldered to a large copper area for reliable 727mW power dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply connection | Accepts 2.5V–6.5V; requires ≥1µF ceramic bypass to GND for stability and line-transient suppression. |
| 2 GND | Power and thermal reference | Electrical ground return and primary heat sink - must connect to large PCB copper area to maintain <110°C/W θJB. |
| 3 SHDN | Active-low enable control | Pulled low disables regulator and initiates autodischarge; VIH ≥2.0V, VIL ≤0.4V - compatible with 1.8V/3.3V logic. |
| 4 BP | Bypass for internal reference | Connects to 0.01µF ceramic capacitor to reduce reference noise; determines output noise floor and startup time. |
| 5 OUT | Regulated output | Delivers up to 200mA; requires 2.2µF–10µF ceramic capacitor (ESR <0.2Ω) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Autodischarge on shutdown | 300Ω internal discharge path actively pulls OUT to GND - eliminates need for external bleed resistors in battery-critical systems. |
| Reverse battery protection | Limits reverse current to ≤1mA when VIN or SHDN < 0V - prevents damage and leakage during incorrect battery insertion. |
| P-channel MOSFET pass element | 1.1Ω RDS(ON); eliminates base-drive current - maintains 100µA IQ regardless of load or dropout, unlike PNP-based LDOs. |
| Low-noise BP filtering | Internal 200kΩ resistor + external 0.01µF forms 80Hz LPF - reduces reference noise contribution, enabling 30µVRMS total output noise. |
| Thermal shutdown with hysteresis | +155°C trip / +140°C recovery - prevents latch-up during intermittent overload; enables safe pulsed operation under thermal stress. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering baseband processor core and I/O rails in GSM/CDMA handsets with single-cell Li-ion battery (2.7V–4.2V). IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive RF transceiver and digital baseband blocks. Use Value: 30µVRMS noise and 236mV dropout ensure clean power delivery across full battery discharge curve without brownouts. |
Use Scenario: Providing regulated 3.3V to PCMCIA Type II card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Local point-of-load regulator isolating card circuitry from noisy host bus power. Use Value: 10nA shutdown current enables zero-power card ejection detection and hot-swap readiness. |
| Hand-Held Instruments | Electronic Planners |
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise 3.3V source for ADC reference and sensor signal conditioning stages. Use Value: 30µVRMS noise and <0.04%/mA load regulation minimize measurement offset drift across battery life. |
Use Scenario: Powering real-time clock (RTC), memory, and display driver in battery-backed PDAs and organizers. IC Role / Device Role / Timing Role: Always-on 3.3V rail maintaining RTC accuracy and SRAM retention during main system sleep. Use Value: Autodischarge function prevents unintended back-powering of host system during planner removal or battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P332MR | 3.3V fixed, 150mA max, 45µVRMS noise, no BP pin or autodischarge - uses NPN pass transistor with higher IQ (50µA no-load, rises in dropout). | Lacks reverse battery protection and active discharge; suitable only where board-level discharge is implemented externally. | Choose when cost sensitivity outweighs noise and shutdown behavior requirements; verify thermal margin at 200mA. |
| Analog Devices ADM7172ACPZ-3.3-R7 | 3.3V fixed, 2A output, 4.5µVRMS noise, 175mV dropout at 2A, but 20-pin LFCSP package - significantly larger footprint and higher BOM cost. | Over-specified current and noise performance; requires additional decoupling and layout effort for high-frequency stability. | Consider only if future scalability to >500mA or sub-10µVRMS noise is required; not drop-in for SOT23-5 space-constrained designs. |
Compared with XC6206P332MR, MAX1598EZK33 delivers lower noise, true 200mA capability, and critical autodischarge - while compared with ADM7172ACPZ-3.3-R7, it offers identical 3.3V functionality in a fraction of the area and cost, trading off ultra-low noise for proven portable-system integration.
Availability
MAX1598EZK33 is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1598EZK33 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, communications, and consumer applications.
The MAX1598 series was designed specifically for battery-powered portable electronics - emphasizing ultra-low quiescent current, low noise, and integrated protection features in minimal SOT23-5 footprint.
FAQ
What is the exact output voltage tolerance of the MAX1598EZK33 over temperature and load?
The MAX1598EZK33 has a guaranteed output voltage accuracy of –3% to +2% over –40°C to +85°C and 0.1mA to 120mA load range. At room temperature and light load (0.1mA), typical deviation is ±1.4%. This tolerance reflects factory trimming of the internal feedback divider and ensures reliable operation for 3.3V logic interfaces without external calibration.
Does the MAX1598EZK33 require an external BP capacitor, and what happens if it's omitted?
Yes, the MAX1598EZK33 requires a 0.01µF ceramic capacitor on the BP pin to achieve its specified 30µVRMS output noise. Omitting it increases output noise to ~80µVRMS due to unfiltered reference noise. The device remains functional but fails to meet low-noise design targets for precision analog or RF circuits.
How does the autodischarge function of the MAX1598EZK33 operate during shutdown?
When SHDN is pulled low, the MAX1598EZK33 activates an internal 300Ω discharge path between OUT and GND. This actively pulls the output voltage to ground within microseconds - eliminating residual charge that could back-power downstream circuitry or interfere with system reset sequencing.
Can the MAX1598EZK33 be used with input voltages below 2.5V?
No - the absolute minimum input voltage for the MAX1598EZK33 is 2.5V, as specified in Absolute Maximum Ratings and Electrical Characteristics. Operation below 2.5V risks improper biasing of internal circuitry and loss of regulation; the device will not start or maintain 3.3V output below this threshold.
What thermal derating applies to the MAX1598EZK33 in a standard SOT23-5 layout?
In a standard thin SOT23-5 layout with GND pin soldered to a 10mm² copper pad, the MAX1598EZK33 has θJB = 110°C/W. Power dissipation must be limited to 727mW at +70°C ambient, derating by 9.1mW/°C above that - meaning maximum safe dissipation drops to ~545mW at +90°C board temperature.
MAX1598EZK33 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):
- 3.3V
- 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
MAX1598EZK33 FAQ
1.How can I place an order for MAX1598EZK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1598EZK33 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 MAX1598EZK33 reliable?
The price and inventory of MAX1598EZK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1598EZK33 is usually 5 days.
3.What payment methods are accepted for MAX1598EZK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1598EZK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1598EZK33?
MAX1598EZK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1598EZK33 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 MAX1598EZK33?
For technical support, including MAX1598EZK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1598EZK33 requirements.
6.How does Aetrix verify that MAX1598EZK33 is sourced from the original manufacturer or authorized distributors?
All MAX1598EZK33 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 MAX1598EZK33 meets industry standards.
7.What is the process for return or replacement of MAX1598EZK33?
All MAX1598EZK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1598EZK33, 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 MAX1598EZK33 part is unused and in its original packaging.
Return procedure for MAX1598EZK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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