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Analog Devices Inc./Maxim Integrated MAX1595ETC50+T
- Part No.:
- MAX1595ETC50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WQFN Exposed Pad
- Datasheet:
-
MAX1595ETC50+T.pdf
- Description:
- IC REG CHRG PUMP 5V 125MA 12TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,645
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Product details
Overview
MAX1595ETC50+T from Maxim Integrated is a regulated 5.0V step-up/step-down charge-pump DC-DC converter designed for compact, high-efficiency auxiliary power in battery-powered systems. It accepts 1.8V–5.5V input, delivers up to 125mA output current, maintains ±3% output regulation, and operates at 1MHz with only three external ceramic capacitors-no inductor required. Used in PCMCIA cards, GSM SIMM modules, and white LED backlighting.
For engineers reviewing the MAX1595ETC50+T datasheet, MAX1595ETC50+T pinout, MAX1595ETC50+T application, or MAX1595ETC50+T equivalent, key selection criteria include its dual-mode (buck/boost) operation, 0.1µA shutdown current, load disconnect during shutdown, and compatibility with space-constrained µMAX and TQFN-EP packages.
Technical Context
The MAX1595ETC50+T implements a constant-frequency, dual-mode charge-pump architecture that dynamically switches between step-up and step-down regulation based on input-to-output voltage relationship. Its internal error amplifier compares AOUT-sensed output against a 1.23V bandgap reference, while MOSFET switches S1 and S2 control charge transfer via CXN/CXP terminals.
It features undervoltage lockout (1.6V threshold with 40mV hysteresis), soft-start (≤2ms), and thermal protection. The TQFN-EP package provides 6°C/W junction-to-case thermal resistance, enabling 150mA continuous output under proper PCB layout with exposed pad grounding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±3% over -40°C to +85°C, 0–125mA load, VIN = 3.0V |
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, NiMH, and 3.3V/5V system rails |
| Switching Frequency | 1.0MHz ±15% - enables use of 0.22µF ceramic transfer capacitor and low-ESR 1µF output cap |
| Quiescent Current | 240µA typical at VIN = 3.0V - minimizes standby power loss in always-on subsystems |
| Shutdown Current | 5µA max at VIN = 5.5V - ensures ultra-low leakage when disabled |
| Output Current | 125mA continuous - sufficient for driving 3–5 white LEDs or powering flash memory VCC |
| Thermal Resistance θJA | 41°C/W (TQFN-EP) - requires ≥200mm² exposed GND copper pour for full 125mA operation |
Pinout & Package
MAX1595ETC50+T is housed in a 12-pin TQFN-EP (3mm × 3mm, 0.5mm pitch) with exposed thermal pad internally connected to GND. The EP must be soldered to a large PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOUT (Pin 1) | Analog sense input | Connects directly to OUT at output capacitor for accurate feedback; critical for regulation stability |
| SHDN (Pin 2) | Digital enable control | Active-high logic input; drives device into 5µA shutdown with automatic load disconnect |
| IN (Pins 3,4) | Main power input | Dual-pin configuration lowers impedance; bypass with 1µF ceramic close to pins |
| GND (Pin 5) | Analog ground reference | Separate from PGND; connects to signal ground plane, not power return path |
| PGND (Pins 6,7) | Power ground return | High-current return for internal switches; tie to GND only at single point near CIN |
| CXN (Pins 8,9) | Negative transfer node | Connects to negative terminal of 0.22µF ceramic charge-transfer capacitor (CX) |
| CXP (Pin 10) | Positive transfer node | Connects to positive terminal of CX; switching node with 1MHz square-wave activity |
| OUT (Pins 11,12) | Regulated output | Dual-pin output reduces IR drop; connect 1µF ceramic filter capacitor directly to pins |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Eliminates EMI-sensitive magnetics and saves >30% board area vs. inductive boost converters |
| Dual-mode regulation | Automatically steps down when VIN > VOUT + ~0.7V, or steps up when VIN < VOUT - no mode-select pin needed |
| Load disconnect in shutdown | Prevents backfeed from output to input, protecting upstream sources like batteries or LDOs |
| Ultra-low shutdown current | 5µA max ensures >10-year shelf life in backup-battery applications (e.g., RTC or SRAM keep-alive) |
| 1MHz fixed-frequency operation | Enables predictable EMI filtering and consistent capacitor sizing across production lots |
Applications
| White LED Backlighting | PCMCIA Card Power |
|---|---|
Use Scenario: Driving 3–5串联 white LEDs in portable LCD displays powered by single-cell Li-ion (2.7–4.2V). IC Role / Device Role / Timing Role: Regulated 5.0V auxiliary supply providing constant current via external resistor or LED driver IC. Use Value: Maintains uniform brightness across battery discharge curve without requiring voltage scaling or PWM dimming compensation. | Use Scenario: Providing isolated 5V rail for legacy PCMCIA Type II peripherals in embedded hosts. IC Role / Device Role / Timing Role: Compact, low-noise local regulator replacing bulky inductive solutions in tight card-edge layouts. Use Value: Enables full 5V compliance (±5%) at 100mA while fitting within 5mm height envelope and meeting JEDEC MO-220 thermal limits. |
| GSM SIMM Card Supply | Flash Memory VCC Boost |
Use Scenario: Generating stable 5V from 3V main rail in GSM SIMM modules with strict size constraints. IC Role / Device Role / Timing Role: Step-up regulator delivering 5V at up to 75mA for SIM interface logic and RF front-end bias. Use Value: Meets ETSI TS 102 232-1 voltage tolerance requirements (4.75–5.25V) across temperature and load without derating. | Use Scenario: Raising 3.3V system rail to 5.0V for NAND/NOR flash programming voltage in handheld devices. IC Role / Device Role / Timing Role: High-efficiency charge-pump source for brief, high-current (100mA peak) flash write cycles. Use Value: Delivers 5.0V ±3% during 10ms write pulses with <50mV ripple, eliminating need for separate boost IC or charge pump IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge-pump regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1595EUA50+ | Same functionality and specs, but in 8-pin µMAX package (θJA = 206.3°C/W); lower thermal capacity | Suitable for ≤75mA loads or ambient <50°C; requires smaller PCB footprint | Select MAX1595EUA50+ when board area is more critical than output current or thermal margin |
| TPS60403DBVR | Fixed 5V output, 60mA max, 1MHz, but lacks step-down capability and has higher quiescent current (250µA) | Limited to pure boost applications; not suitable for buck-mode operation or >60mA loads | Choose TPS60403DBVR only if cost is primary and 5V-only boost from ≥2.7V suffices |
Compared with MAX1595EUA50+, the MAX1595ETC50+T offers 6× better thermal performance and 67% higher output current; versus TPS60403DBVR, it adds true buck-boost flexibility, 100% higher current rating, and integrated load disconnect-critical for battery longevity in portable designs.
Availability
MAX1595ETC50+T is available at Aetrix Electronics and suitable for white LED backlighting, PCMCIA card power, and GSM SIMM card supply requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for MAX1595ETC50+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 industrial, communications, and consumer applications.
The MAX1595 product line was engineered specifically for space-constrained, battery-powered systems needing efficient, inductorless 3.3V/5.0V local regulation - targeting portable instrumentation, memory modules, and display subsystems.
FAQ
What is the maximum continuous output current of the MAX1595ETC50+T?
The MAX1595ETC50+T delivers up to 125mA continuous output current at 5.0V when properly thermally managed on a PCB with ≥200mm² exposed GND copper connected to the TQFN-EP pad. This rating assumes VIN ≥ 2.7V and ambient temperature ≤ +70°C. At higher temperatures or lower input voltages, derating applies per the 41°C/W θJA specification.
Does the MAX1595ETC50+T require an inductor?
No, the MAX1595ETC50+T is a capacitor-based charge-pump regulator and requires no inductor. It uses three external ceramic capacitors - 1µF input (CIN), 0.22µF transfer (CX), and 1µF output (COUT) - to achieve regulated 5.0V output. This eliminates magnetic components, reduces EMI, and minimizes solution size compared to inductive DC-DC converters.
How does the MAX1595ETC50+T handle input voltages above 5.0V?
The MAX1595ETC50+T automatically operates in step-down (buck) mode when VIN exceeds VOUT by ~0.7V or more. In this mode, internal switch S1 remains continuously connected to IN, while S2 alternates between IN and OUT to regulate output. This allows stable 5.0V output even when VIN rises to 5.5V - essential for systems where input rail may overshoot during hot-swap or battery charging.
What is the purpose of the AOUT pin on the MAX1595ETC50+T?
The AOUT pin on the MAX1595ETC50+T serves as the analog feedback sense input for the internal error amplifier. It must be connected directly to the OUT node at the output capacitor's ground-side terminal to ensure accurate regulation. Routing AOUT separately from OUT introduces measurement error and can cause output voltage drift or instability, especially under dynamic load conditions.
Is the MAX1595ETC50+T RoHS-compliant and lead-free?
Yes, the MAX1595ETC50+T carries a "+" suffix indicating full RoHS compliance and lead-free construction per JEDEC J-STD-609. The TQFN-EP package uses matte tin (Sn) termination and meets IPC/JEDEC standard reflow profiles up to +260°C. The exposed pad is internally connected to GND and must be soldered to a PCB ground plane for both thermal and environmental compliance.
MAX1595ETC50+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 125mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TQFN (4x4)
MAX1595ETC50+T FAQ
1.How can I place an order for MAX1595ETC50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1595ETC50+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 MAX1595ETC50+T reliable?
The price and inventory of MAX1595ETC50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1595ETC50+T is usually 5 days.
3.What payment methods are accepted for MAX1595ETC50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1595ETC50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1595ETC50+T?
MAX1595ETC50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1595ETC50+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 MAX1595ETC50+T?
For technical support, including MAX1595ETC50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1595ETC50+T requirements.
6.How does Aetrix verify that MAX1595ETC50+T is sourced from the original manufacturer or authorized distributors?
All MAX1595ETC50+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 MAX1595ETC50+T meets industry standards.
7.What is the process for return or replacement of MAX1595ETC50+T?
All MAX1595ETC50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1595ETC50+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 MAX1595ETC50+T part is unused and in its original packaging.
Return procedure for MAX1595ETC50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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