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Analog Devices Inc./Maxim Integrated MAX1598EZK50-T
- Part No.:
- MAX1598EZK50-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1598EZK50-T.pdf
- Description:
- IC REG LINEAR 200MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:6,089
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Product details
Overview
MAX1598EZK50-T from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 5.0V 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 power rail regulator in portable battery-powered systems requiring stable, clean voltage under varying load and input conditions.
For engineers reviewing the MAX1598EZK50-T datasheet, MAX1598EZK50-T pinout, MAX1598EZK50-T application, or MAX1598EZK50-T equivalent, key selection criteria include its 5.0V fixed output, thin SOT23-5 package footprint, autodischarge shutdown function, reverse battery protection, and compatibility with low-ESR ceramic output capacitors for handheld instrumentation and communication modules.
Technical Context
The MAX1598EZK50-T uses an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) to achieve low dropout and eliminate base-drive current loss. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin, enabling precise regulation without external resistors.
It integrates thermal shutdown (155°C trip, 15°C hysteresis), short-circuit protection with 458mA current limit, and reverse battery protection limiting reverse current to 1mA. The BP pin connects to a 0.01µF capacitor forming an 80Hz low-pass filter that reduces reference noise, directly contributing to its 30µVRMS output noise performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00V ±2% over -40°C to +85°C; eliminates need for external feedback resistors and simplifies layout. |
| Max Output Current | 200mA continuous; supports moderate-power analog/digital subsystems such as RF front-ends or microcontroller cores. |
| Dropout Voltage | 236mV at 200mA; enables operation down to VIN = 5.236V, extending usable battery life in single-cell Li-ion or dual-cell alkaline systems. |
| Output Noise | 30µVRMS (10Hz–100kHz); sufficiently low for noise-sensitive analog circuits like ADC references or VCO supplies. |
| Quiescent Current | 100µA across full load and dropout range; maintains high efficiency during light-load or standby modes in portable devices. |
| Shutdown Current | 10nA logic-controlled shutdown; enables ultra-low-power system sleep states without external discharge circuitry. |
| Input Voltage Range | 2.5V to 6.5V; accommodates wide battery chemistries including Li-ion (3.0–4.2V), NiMH (2.4–3.0V), and 5V USB-supplied systems. |
Pinout & Package
MAX1598EZK50-T 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 PCB copper area for reliable power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator input supply | Accepts 2.5V–6.5V; requires ≥1µF bypass capacitor to GND for stability and line-transient suppression. |
| 2 - GND | Power and thermal ground | Electrical reference and primary heat sink; must connect to large PCB ground plane to maintain TJ ≤ +150°C at full load. |
| 3 - SHDN | Active-low enable/shutdown control | Logic-low (<0.4V) places device in 10nA shutdown with active output discharge; tie to IN for always-on operation. |
| 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 ceramic capacitor (ESR <0.2Ω) for stability across temperature and load. |
Key Features
| Feature | Design Value |
|---|---|
| Autodischarge shutdown | Actively pulls OUT to GND via internal 300Ω resistor when SHDN is low - eliminates need for external discharge FET in battery-critical systems. |
| Reverse battery protection | Limits reverse current to ≤1mA if VIN or SHDN falls below GND - prevents damage during incorrect battery insertion in consumer handhelds. |
| P-channel MOSFET pass element | 1.1Ω typical RDS(ON) enables constant 100µA quiescent current regardless of load or dropout - maximizes battery runtime. |
| Thermal overload protection | Shuts down at +155°C with +15°C hysteresis - provides safe pulsed operation during sustained overload without latch-off. |
| Low-noise BP filtering | Internal 200kΩ resistor + external 0.01µF BP capacitor forms 80Hz low-pass filter - reduces reference noise contribution to final 30µVRMS output. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
|
Use Scenario: Powering RF transceiver bias rails and baseband processor I/O supplies in GSM/CDMA handsets with single Li-ion cell input. IC Role / Device Role / Timing Role: Primary LDO delivering clean 5.0V to noise-sensitive analog blocks while maintaining regulation down to end-of-discharge voltage. Use Value: 30µVRMS noise ensures minimal phase noise degradation in VCOs; autodischarge prevents residual voltage from interfering with hot-swap detection. |
Use Scenario: Providing regulated 5.0V to PCMCIA card controller logic and interface buffers during hot-plug insertion into laptops. IC Role / Device Role / Timing Role: Standby-ready power source with 10nA shutdown and fast wake-up (<300µs with 0.1µF BP cap) for instant card enumeration. Use Value: Reverse battery protection avoids latch-up during misaligned card insertion; thin SOT23-5 footprint fits tight PCMCIA Type II height constraints. |
| Hand-Held Instruments | Palmtop Computers |
|
Use Scenario: Supplying precision analog front-end (AFE) and microcontroller core in portable multimeters or data loggers powered by AA/AAA batteries. IC Role / Device Role / Timing Role: Low-quiescent-current LDO sustaining >100-hour battery life while delivering stable 5.0V to ADC reference and sensor signal chain. Use Value: 100µA IQ independent of load enables consistent runtime across measurement modes; thermal shutdown prevents overheating during extended calibration routines. |
Use Scenario: Regulating 5.0V for LCD backlight drivers and flash memory interfaces in early-generation palmtops using dual alkaline cells. IC Role / Device Role / Timing Role: High-PSRR (63dB @ low freq) LDO rejecting switching noise from DC-DC converters powering CPU and RAM. Use Value: 2.5V–6.5V input range accommodates fresh-to-dead battery swing (3.2V–1.8V per cell); 200mA output supports peak backlight current surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76350DBVR | 5.0V fixed output, 150mA max, 35µVRMS noise, 220mV dropout at 150mA, 85µA IQ, SOT23-5 package | Lower output current and slightly higher noise; lacks autodischarge and reverse battery protection | Choose when cost sensitivity outweighs need for 200mA drive or battery-reversal safety in non-consumer designs. |
| MCP1703T-5002E/MB | 5.0V fixed output, 250mA max, 45µVRMS noise, 600mV dropout at 250mA, 4µA IQ, SOT23-5 package | Ultra-low IQ but higher dropout and noise; no BP pin or autodischarge; reverse polarity protection not integrated | Prefer for ultra-long-life battery applications where dropout margin is ample and noise is secondary to quiescent power. |
Compared with TPS76350DBVR and MCP1703T-5002E/MB, the MAX1598EZK50-T uniquely combines 200mA drive, 30µVRMS noise, autodischarge, and reverse battery protection in a thin SOT23-5 - making it optimal for space-constrained, safety-critical portable electronics where all four features are concurrently required.
Availability
MAX1598EZK50-T is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, and hand-held instruments requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MAX1598EZK50-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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.
The MAX1598 family was designed specifically for battery-powered portable electronics needing ultra-low-noise, low-quiescent-current regulation with robust fault protection - targeting applications where size, efficiency, and reliability are co-prioritized.
FAQ
What is the exact output voltage tolerance of the MAX1598EZK50-T over temperature?
The MAX1598EZK50-T delivers 5.00V output with ±2% accuracy over the full operating temperature range of -40°C to +85°C, as specified in the Electrical Characteristics table. At +25°C, typical output voltage accuracy is ±1.4%, and the device maintains this tight regulation without external trimming components due to its factory-trimmed internal feedback divider.
Does the MAX1598EZK50-T require an external BP capacitor, and what happens if it is omitted?
Yes, the MAX1598EZK50-T requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. Omitting the BP capacitor increases output noise significantly - measurements show noise rises to ~80µVRMS without it - and degrades PSRR above 1kHz. The BP pin must never be left floating or shorted to GND.
How does the autodischarge function operate in the MAX1598EZK50-T during shutdown?
When the MAX1598EZK50-T enters shutdown (SHDN ≤ 0.4V), its internal 300Ω discharge switch actively connects OUT to GND, pulling the output voltage to near-zero within microseconds. This eliminates residual voltage that could interfere with system-level power sequencing or cause leakage in downstream circuits - a critical feature for battery-backed real-time clocks or hot-swap interfaces.
Can the MAX1598EZK50-T be used with input voltages below 2.5V?
No - the MAX1598EZK50-T has a minimum input voltage specification of 2.5V, enforced by internal circuitry. Operation below 2.5V may result in unregulated output, increased dropout, or failure to start. For sub-2.5V inputs, consider alternative regulators such as the MAX8867 or TPS780xx series, which support down to 1.7V or lower.
What is the maximum allowable power dissipation for the MAX1598EZK50-T in its thin SOT23-5 package?
The MAX1598EZK50-T has a continuous power dissipation limit of 727mW at +70°C ambient, with derating of 9.1mW/°C above that temperature. Actual dissipation depends on (VIN – VOUT) × IOUT; for example, at VIN = 5.5V, VOUT = 5.0V, and IOUT = 200mA, power dissipation is 100mW - well within safe limits provided the GND pin is soldered to ≥100mm² copper area for thermal conduction.
MAX1598EZK50-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):
- 5V
- 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
MAX1598EZK50-T FAQ
1.How can I place an order for MAX1598EZK50-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1598EZK50-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 MAX1598EZK50-T reliable?
The price and inventory of MAX1598EZK50-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1598EZK50-T is usually 5 days.
3.What payment methods are accepted for MAX1598EZK50-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1598EZK50-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1598EZK50-T?
MAX1598EZK50-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1598EZK50-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 MAX1598EZK50-T?
For technical support, including MAX1598EZK50-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1598EZK50-T requirements.
6.How does Aetrix verify that MAX1598EZK50-T is sourced from the original manufacturer or authorized distributors?
All MAX1598EZK50-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 MAX1598EZK50-T meets industry standards.
7.What is the process for return or replacement of MAX1598EZK50-T?
All MAX1598EZK50-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1598EZK50-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 MAX1598EZK50-T part is unused and in its original packaging.
Return procedure for MAX1598EZK50-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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