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Analog Devices Inc./Maxim Integrated MAX1598EZK50
- Part No.:
- MAX1598EZK50
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX1598EZK50.pdf
- Description:
- IC REG LINEAR 200MA LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,245
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Product details
Overview
MAX1598EZK50 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 datasheet, MAX1598EZK50 pinout, MAX1598EZK50 application, or MAX1598EZK50 equivalent, key selection criteria include its fixed 5.0V output, thin SOT23-5 package, autodischarge shutdown, reverse battery protection, and compatibility with low-ESR ceramic output capacitors for handheld instrumentation and PCMCIA applications.
Technical Context
The MAX1598EZK50 integrates an internal P-channel MOSFET pass transistor (1.1Ω typical RDS(ON)) enabling ultra-low quiescent current (100µA) across all operating conditions-including dropout-by eliminating base-drive losses inherent in PNP-based regulators. Its feedback loop uses a 1.25V bandgap reference and internal resistor divider to maintain precise 5.0V output.
It implements dual-stage noise reduction: a 0.01µF capacitor on the BP pin forms an 80Hz low-pass filter with an internal 200kΩ resistor, while the output stage delivers 30µVRMS noise (10Hz–100kHz) with COUT = 10µF. Thermal shutdown 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 | Fixed 5.0V ±2% over -40°C to +85°C; enables direct replacement of 5V logic rails without external resistors. |
| Max Output Current | 200mA continuous; supports moderate-power microcontrollers, RF front-ends, or sensor signal chains in compact devices. |
| Dropout Voltage | 236mV at 200mA; allows operation down to VIN = 5.236V, extending usable battery life in single-cell Li-ion or 3×AA configurations. |
| Output Noise | 30µVRMS (10Hz–100kHz); meets stringent analog/RF supply requirements without additional LDO post-regulation. |
| Quiescent Current | 100µA at full load and in dropout; ensures minimal battery drain during active operation, critical for always-on subsystems. |
| Shutdown Current | 10nA logic-controlled shutdown; reduces system standby power to nanoampere levels for long-term battery retention. |
| Protection Features | Thermal shutdown (+155°C), short-circuit immunity, reverse battery protection (≤1mA reverse current), and output current limiting (220–458mA). |
Pinout & Package
MAX1598EZK50 is housed in a thin 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm height), optimized for space-constrained portable designs. The GND pin serves dual roles: electrical reference and thermal path to PCB copper.
| 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 | Ground reference and thermal sink | Must connect to large PCB copper area or ground plane to dissipate heat and maintain <150°C junction temperature. |
| 3 - SHDN | Active-low enable/shutdown control | Pulled low (<0.4V) disables regulator and initiates autodischarge; pulled high (>2.0V) enables operation. |
| 4 - BP | Bypass node for reference noise filtering | Connects to 0.01µF ceramic capacitor to reduce output noise; values >0.1µF increase startup delay without benefit. |
| 5 - OUT | Regulated 5.0V output | Sources up to 200mA; requires 2.2µF–10µF ceramic capacitor (ESR <0.2Ω) for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Autodischarge function | Actively pulls OUT to GND during shutdown via internal discharge path (300Ω), preventing floating outputs in battery-backed systems. |
| P-channel MOSFET pass element | Eliminates base-drive current loss, enabling constant 100µA IQ regardless of load or dropout-critical for battery runtime predictability. |
| Reverse battery protection | Blocks reverse current to ≤1mA when IN or SHDN goes negative, protecting downstream circuitry without external diodes. |
| Low-noise BP filtering | Internal 200kΩ resistor + external 0.01µF BP capacitor creates 80Hz low-pass filter, reducing reference noise contribution to output. |
| Stable with ceramic capacitors | Guaranteed stable with 2.2µF X7R/X5R ceramic output caps (ESR <0.2Ω), avoiding tantalum or electrolytic dependencies. |
Applications
| Cellular Handsets | PCMCIA Cards |
|---|---|
Use Scenario: Powering baseband processor core and RF transceiver sections in GSM/CDMA handsets with single Li-ion cell input. IC Role / Device Role / Timing Role: Primary 5.0V LDO delivering clean, low-noise supply to sensitive analog blocks and digital logic, maintaining regulation down to end-of-life battery voltage. Use Value: 236mV dropout extends usable battery range by ~20 minutes at 200mA load; 30µVRMS noise prevents RF desensitization and ADC quantization errors. | Use Scenario: Providing regulated 5.0V to PCMCIA Type II card controllers and interface logic in laptop expansion slots. IC Role / Device Role / Timing Role: Standalone fixed-output LDO replacing switching solutions where EMI must be minimized near high-speed data buses. Use Value: 10nA shutdown current enables hot-swap compliance; thin SOT23-5 footprint fits tight card-edge layouts without compromising thermal performance. |
| Hand-Held Instruments | Palmtop Computers |
Use Scenario: Supplying precision analog front-end (AFE), ADC, and microcontroller in portable multimeters or environmental sensors. IC Role / Device Role / Timing Role: Low-noise 5.0V rail generator ensuring measurement accuracy and minimizing offset drift in op-amp and reference circuits. Use Value: 30µVRMS noise directly translates to <0.003% full-scale error in 12-bit ADC systems; autodischarge prevents false wake-up during storage. | Use Scenario: Regulating main system voltage for CPU, display driver, and memory in clamshell-form-factor palmtops with AA/AAA battery packs. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO supporting burst-mode CPU loads while maintaining stable 5.0V under dynamic current steps up to 200mA. Use Value: 12mV load-transient deviation (0→50mA step) ensures reliable operation of SRAM and LCD controllers; reverse battery protection safeguards against user-insertion errors. |
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 |
|---|---|---|---|
| TPS76350DBVR | 5.0V fixed output, 150mA max, 120mV dropout at 150mA, 35µVRMS noise, SOT23-5 package | Limited to 150mA; higher noise; no autodischarge or reverse battery protection | Select when lower cost and 150mA load suffice; avoid if >150mA peak or reverse polarity risk exists. |
| MCP1700T-5002E/TT | 5.0V fixed output, 250mA max, 178mV dropout at 250mA, 30µVRMS noise, SOT23-5 package | No BP pin or adjustable noise filtering; no reverse battery protection; no autodischarge | Choose for higher current margin and similar noise; omit if BP-based noise tailoring or safe shutdown discharge is required. |
Compared with TPS76350DBVR and MCP1700T-5002E/TT, the MAX1598EZK50 uniquely combines 200mA capability, 30µVRMS noise with BP filtering, autodischarge, and reverse battery protection in a thin SOT23-5-making it optimal for safety-critical, noise-sensitive, battery-reversal-prone portable designs.
Availability
MAX1598EZK50 is available at Aetrix Electronics and suitable for cellular handsets, PCMCIA cards, and hand-held instruments requiring stable component supply, guaranteed long-term availability, and traceable sourcing for production ramp and lifecycle management.
Supply support for MAX1598EZK50 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 requiring ultra-low quiescent current, low noise, and robust protection features in minimal footprint-targeting cellular phones, PCMCIA, and handheld instrumentation markets.
FAQ
What is the exact output voltage tolerance of the MAX1598EZK50 over temperature and load?
The MAX1598EZK50 has a guaranteed output voltage accuracy of –3% to +2% over the full –40°C to +85°C temperature range and 0.1mA to 120mA load current, with typical deviation <±1.4% at +25°C and 0.1mA load. This 5.0V ±2% specification ensures reliable logic-level compatibility across battery discharge profiles and ambient conditions without external trimming.
Does the MAX1598EZK50 require an external BP capacitor, and what happens if it's omitted?
Yes, the MAX1598EZK50 requires a 0.01µF ceramic capacitor between BP and GND to achieve its specified 30µVRMS output noise. Omitting it increases output noise to ~80µVRMS due to unfiltered reference noise coupling into the error amplifier, degrading performance in noise-sensitive analog or RF applications powered by the MAX1598EZK50.
How does the autodischarge function operate in the MAX1598EZK50 during shutdown?
When the MAX1598EZK50 enters shutdown (SHDN < 0.4V), an internal 300Ω discharge path connects OUT to GND, actively pulling the output voltage to ground within microseconds. This prevents residual charge from powering downstream circuitry or causing undefined states-critical for battery-backed memory or real-time clocks in systems using the MAX1598EZK50.
Can the MAX1598EZK50 be used with input voltages below 2.5V?
No-the MAX1598EZK50 has a minimum input voltage rating of 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V risks improper regulation, increased dropout, or failure to maintain 5.0V output; it is not characterized or guaranteed for sub-2.5V operation, even briefly during battery sag.
What thermal derating applies to the MAX1598EZK50 in a standard PCB layout?
In a standard 2-layer PCB with 1-inch² copper pour connected to the GND pin, the MAX1598EZK50's thermal resistance θJA is ~220°C/W. At 200mA load and 5.236V input (236mV dropout), power dissipation is 47mW, resulting in ~10°C junction rise above ambient-well within the +150°C absolute max. Larger copper areas further reduce thermal rise for the MAX1598EZK50.
MAX1598EZK50 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 FAQ
1.How can I place an order for MAX1598EZK50 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1598EZK50 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 reliable?
The price and inventory of MAX1598EZK50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1598EZK50 is usually 5 days.
3.What payment methods are accepted for MAX1598EZK50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1598EZK50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1598EZK50?
MAX1598EZK50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1598EZK50 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?
For technical support, including MAX1598EZK50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1598EZK50 requirements.
6.How does Aetrix verify that MAX1598EZK50 is sourced from the original manufacturer or authorized distributors?
All MAX1598EZK50 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 meets industry standards.
7.What is the process for return or replacement of MAX1598EZK50?
All MAX1598EZK50 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1598EZK50, 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 part is unused and in its original packaging.
Return procedure for MAX1598EZK50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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