My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1598EZK4A-T
- Part No.:
- MAX1598EZK4A-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1598EZK4A-T.pdf
- Description:
- LOW-NOISE, LOW-DROPOUT, 200MA, L
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1598EZK4A-T from Maxim Integrated is a low-noise, low-dropout linear regulator with preset 4.0V output, delivering up to 200mA from 2.5V–6.5V input. It features 30µVRMS output noise, 236mV dropout at 200mA, 100µA operating supply current independent of load or dropout condition, and integrated autodischarge during shutdown. It serves as a stable voltage source in space-constrained battery-powered handheld instruments and PCMCIA cards.
For engineers reviewing the MAX1598EZK4A-T datasheet, MAX1598EZK4A-T pinout, MAX1598EZK4A-T application, or MAX1598EZK4A-T equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options for portable power management design.
Technical Context
The MAX1598EZK4A-T employs an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current (100µA) across all operating conditions-including full dropout-and eliminating base-drive losses inherent in PNP-based regulators. Its error amplifier compares a 1.25V bandgap reference against feedback from an internal resistor divider tied to the OUT pin.
Noise reduction is achieved via a dedicated BP pin with external 0.01µF capacitor forming an 80Hz low-pass filter; thermal protection activates at +155°C with 15°C hysteresis, and reverse battery protection limits reverse current to 1mA when IN or SHDN falls below ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Preset 4.0V ±2% over -40°C to +85°C - eliminates external feedback resistors and ensures stable rail for 3.3V/4.0V logic interfaces. |
| Max Output Current | 200mA continuous - supports moderate-power analog circuitry and microcontroller peripherals without thermal derating in thin SOT23. |
| Dropout Voltage | 236mV at 200mA - enables operation down to ~4.24V input when regulating 4.0V, extending usable battery life in single-cell Li-ion systems. |
| Output Noise | 30µVRMS (10Hz–100kHz) with 0.01µF BP cap - meets low-noise requirements for RF front-ends and precision ADC references. |
| Supply Current | 100µA operating, 10nA in shutdown - minimizes standby drain in always-on portable devices with infrequent wake cycles. |
| Protection Features | Thermal shutdown (+155°C), short-circuit immunity, reverse battery protection (≤1mA reverse current), and active output discharge - reduces need for external protection components. |
| Input Voltage Range | 2.5V to 6.5V - compatible with Li-ion, Li-poly, NiMH, and regulated 5V supplies without input overvoltage risk. |
Pinout & Package
MAX1598EZK4A-T is housed in a thin 5-pin SOT23 package (JEDEC MO-178AA), with exposed pad not electrically connected. The GND pin serves dual function as electrical return and thermal path - requires soldering to ≥25 mm² copper area for rated power 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 | Ground reference and thermal sink | Must connect to large PCB copper area to maintain junction temperature ≤+150°C at full load. |
| 3 - SHDN | Active-low enable control | Pull low to enter 10nA shutdown with active output discharge; tie to IN for always-on operation. |
| 4 - BP | Bypass node for noise filter | Connects internally to 200kΩ resistor; 0.01µF ceramic cap here reduces output noise by filtering reference noise. |
| 5 - OUT | Regulated output | Delivers up to 200mA; requires 2.2µF–10µF ceramic cap (ESR <0.2Ω) to ensure stability across temperature and load. |
Key Features
| Feature | Design Value |
|---|---|
| Autodischarge on shutdown | Internal 300Ω discharge path actively pulls OUT to GND within microseconds - prevents floating outputs and unintended biasing of downstream circuitry. |
| P-channel MOSFET pass element | 1.1Ω RDS(ON) eliminates base-drive current - maintains 100µA IQ regardless of load or dropout, unlike PNP LDOs that increase quiescent current under heavy load. |
| Reverse battery protection | Blocks reverse current to ≤1mA when IN or SHDN < 0V - protects device and system during incorrect battery insertion without external diodes. |
| Low-noise BP pin architecture | Integrated 200kΩ resistor + external 0.01µF cap forms 80Hz filter - achieves 30µVRMS noise without requiring expensive low-ESR tantalum or polymer caps. |
| Thermal shutdown with hysteresis | +155°C trip with +15°C hysteresis - enables safe pulsed operation during overload while preventing thermal runaway or latch-up. |
Applications
| Hand-Held Instruments | PCMCIA Cards |
|---|---|
|
Use Scenario: Portable multimeters and handheld oscilloscopes powered by single-cell Li-ion batteries with tight space constraints. IC Role / Device Role / Timing Role: Primary 4.0V analog supply for precision ADCs, op-amps, and display drivers. Use Value: 30µVRMS noise ensures sub-LSB measurement accuracy; 236mV dropout extends usable battery range to ~4.24V cutoff. |
Use Scenario: Hot-pluggable PCMCIA memory or modem cards requiring clean, fast-turn-on regulated power. IC Role / Device Role / Timing Role: Local 4.0V rail generator isolated from noisy host bus voltage. Use Value: 10nA shutdown current prevents card battery drain when ejected; autodischarge avoids residual voltage hazards during reinsertion. |
| Electronic Planners | Modems |
|
Use Scenario: Low-power PDAs and scheduling assistants using coin-cell or rechargeable backup batteries. IC Role / Device Role / Timing Role: Always-on 4.0V supply for RTC, SRAM retention, and wake-up logic. Use Value: 100µA IQ preserves battery life for >1 year in sleep mode; reverse battery protection guards against user-insertion errors. |
Use Scenario: Embedded dial-up or DSL modems in compact enclosures with limited airflow. IC Role / Device Role / Timing Role: Stable 4.0V bias for line-driver ICs and analog front-end filters. Use Value: Thermal shutdown prevents failure during sustained data transmission; thin SOT23 fits dense modem PCB layouts. |
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 |
|---|---|---|---|
| TPS76340DBVR | 4.0V fixed output, 150mA max, 120mV dropout at 150mA, 50µVRMS noise, SOT23-5 package | Limited to 150mA and higher noise - unsuitable for 200mA loads or ultra-low-noise signal chains. | Select only if load current ≤150mA and noise budget allows ≥50µVRMS. |
| MCP1703T-4002E/MB | 4.0V fixed output, 250mA max, 600mV dropout at 250mA, 30µVRMS noise, SOT23-5 package | Higher dropout (600mV vs. 236mV) reduces usable battery voltage range by >360mV in Li-ion systems. | Prefer when higher output current margin is needed and input voltage headroom exceeds 4.6V. |
Compared with MAX1598EZK4A-T, TPS76340DBVR trades current capability and noise performance for lower dropout, while MCP1703T-4002E/MB offers higher current but sacrifices battery runtime due to significantly larger dropout voltage - making MAX1598EZK4A-T optimal for 200mA, low-noise, long-runtime portable designs.
Availability
MAX1598EZK4A-T is available at Aetrix Electronics and suitable for hand-held instruments, PCMCIA cards, electronic planners, modems, and cellular phone subsystems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX1598EZK4A-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 and mixed-signal ICs for power, interface, sensing, and timing applications.
The MAX1598 series was designed specifically for battery-powered portable electronics requiring ultra-low noise, minimal quiescent current, and robust protection - targeting handheld instrumentation, communications modules, and energy-sensitive embedded systems.
FAQ
What is the exact preset output voltage of MAX1598EZK4A-T?
The MAX1598EZK4A-T has a factory-preset output voltage of 4.0V, with initial accuracy of ±1.4% at +25°C and ±3% to +2% over the full -40°C to +85°C operating range. This value is laser-trimmed during production and does not require external resistors - the '4A' suffix in MAX1598EZK4A-T explicitly denotes the 4.0V output configuration per Maxim's Selector Guide.
Does MAX1598EZK4A-T support active output discharge during shutdown?
Yes, MAX1598EZK4A-T includes an integrated autodischarge function: when SHDN is pulled low, an internal 300Ω switch actively discharges the OUT pin to GND. This behavior is confirmed in the Functional Diagram and Pin Description sections, and eliminates the need for external discharge circuitry in battery-backed or hot-swap applications.
What is the minimum input voltage required for regulation at full 200mA load with MAX1598EZK4A-T?
At 200mA load, MAX1598EZK4A-T requires a minimum input voltage of 4.236V to maintain regulation - calculated as VOUT + VDROP = 4.0V + 236mV. This value is specified in the Electrical Characteristics table under "Dropout Voltage" and is validated across -40°C to +85°C, ensuring reliable operation down to end-of-life battery voltages in single-cell Li-ion systems.
Can MAX1598EZK4A-T be used with ceramic output capacitors?
Yes, MAX1598EZK4A-T is fully compatible with ceramic output capacitors. The datasheet specifies a minimum 2.2µF X7R/X5R ceramic capacitor (ESR <0.2Ω) for stable operation across temperature and load. Larger values (up to 10µF) improve PSRR and transient response - no series resistance or special dielectric requirements are needed.
What protection features are integrated into MAX1598EZK4A-T?
MAX1598EZK4A-T integrates five protection functions: (1) thermal shutdown at +155°C with 15°C hysteresis, (2) short-circuit protection enabling indefinite output grounding, (3) reverse battery protection limiting reverse current to ≤1mA, (4) output current limiting (min 220mA), and (5) autodischarge during shutdown. All are implemented internally without external components.
MAX1598EZK4A-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):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.236V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- 100 µA
- PSRR:
- -
- Control Features:
- Shutdown
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX1598EZK4A-T FAQ
1.How can I place an order for MAX1598EZK4A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1598EZK4A-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 MAX1598EZK4A-T reliable?
The price and inventory of MAX1598EZK4A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1598EZK4A-T is usually 5 days.
3.What payment methods are accepted for MAX1598EZK4A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1598EZK4A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1598EZK4A-T?
MAX1598EZK4A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1598EZK4A-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 MAX1598EZK4A-T?
For technical support, including MAX1598EZK4A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1598EZK4A-T requirements.
6.How does Aetrix verify that MAX1598EZK4A-T is sourced from the original manufacturer or authorized distributors?
All MAX1598EZK4A-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 MAX1598EZK4A-T meets industry standards.
7.What is the process for return or replacement of MAX1598EZK4A-T?
All MAX1598EZK4A-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1598EZK4A-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 MAX1598EZK4A-T part is unused and in its original packaging.
Return procedure for MAX1598EZK4A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1598EZK4A-T Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
