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Analog Devices Inc./Maxim Integrated MAX1595EUA50+T
- Part No.:
- MAX1595EUA50+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX1595EUA50+T.pdf
- Description:
- IC REG CHARG PUMP 5V 125MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:5,795
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Product details
Overview
MAX1595EUA50+ from Maxim Integrated is a regulated 5.0V step-up/step-down charge-pump DC-DC converter delivering up to 125mA output current from a 1.8V–5.5V input, with ±3% output voltage accuracy and 1MHz fixed-frequency operation. It requires only three external ceramic capacitors (no inductor), supports load disconnect in shutdown, and targets compact auxiliary power in battery-powered miniature equipment.
For engineers reviewing the MAX1595EUA50+ datasheet, MAX1595EUA50+ pinout, MAX1595EUA50+ application, or MAX1595EUA50+ equivalent, key selection criteria include its dual-mode regulation (buck/boost), ultra-low 0.1µA shutdown current, 220µA no-load quiescent current, and compatibility with 1µF ceramic output capacitance for stable 5V rail generation in space-constrained designs.
Technical Context
The MAX1595EUA50+ implements a constant-frequency charge-pump architecture with integrated MOSFET switches, error amplifier, and 1.23V bandgap reference. Its control scheme enables seamless transition between step-up and step-down modes depending on input-to-output voltage relationship - stepping down when VIN exceeds VOUT by ≥0.7V, stepping up otherwise.
It features undervoltage lockout (UVLO) with 1.60V threshold and 40mV hysteresis, soft-start timing ≤2ms, and internal power-ground (PGND) separation for noise-sensitive analog sensing via AOUT pin tied to the output capacitor's high-side node.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±3% over -40°C to +85°C, 0–125mA load, enabling direct replacement of LDOs in 5V logic rails. |
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion (3.0–4.2V), two-cell alkaline (2.4–3.2V), or USB-powered systems without external pre-regulation. |
| Switching Frequency | 1.0MHz typical - allows use of small 0.22µF transfer capacitor and 1µF ceramic output capacitor, minimizing board area. |
| No-Load Quiescent Current | 240µA typical at VIN = 3.0V - ensures low standby power in always-on subsystems like SIM card interfaces or backup memory supplies. |
| Shutdown Current | 0.1µA maximum - enables true system-level power gating with negligible battery drain during deep sleep. |
| Output Current Capability | 125mA continuous - sufficient to drive multiple white LEDs, flash memory VCC pins, or PCMCIA card logic rails. |
| Regulation Accuracy | ±3% over full temperature and load range - meets tight tolerance requirements for microcontroller I/O supply or sensor biasing. |
Pinout & Package
MAX1595EUA50+ is housed in an 8-pin µMAX® package (3mm × 3mm, 0.5mm pitch), RoHS-compliant and lead-free. Thermal resistance θJA = 206.3°C/W enables operation up to +85°C ambient with minimal derating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AOUT) | Analog power/sense input to error amplifier | Must connect directly to the high-side terminal of COUT for accurate output voltage sensing and ripple rejection. |
| 2 (SHDN) | Active-high shutdown control | Drives device into 0.1µA shutdown state when pulled low; rising edge initiates soft-start sequence. |
| 3 (IN) | Main power input | Accepts 1.8–5.5V; requires local 1µF ceramic bypass to GND to suppress switching noise. |
| 4 (GND) | Analog ground reference | Separate from PGND; connects to low-side of CIN and COUT; must be star-connected to minimize noise coupling. |
| 5 (PGND) | Power ground return | Carries high-frequency switch currents; ties to low-side of CX and OUT; routed separately from GND to avoid ground bounce. |
| 6 (CXN) | Negative terminal of charge-transfer capacitor | Connects to negative side of 0.22µF ceramic CX capacitor; forms half of flying-capacitor switching node. |
| 7 (CXP) | Positive terminal of charge-transfer capacitor | Connects to positive side of CX; alternately couples to IN (charge phase) and OUT (transfer phase). |
| 8 (OUT) | Regulated 5.0V output | Delivers up to 125mA; bypassed with 1µF ceramic COUT; connects to AOUT for feedback loop closure. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless topology | Eliminates magnetic EMI, PCB area, and cost of inductors - ideal for ultra-thin handhelds and embedded modules. |
| Dual-mode regulation (buck/boost) | Maintains 5.0V output whether input is 2.0V (boost) or 4.5V (buck), simplifying power architecture across battery discharge curves. |
| Load disconnect in shutdown | Isolates OUT from IN during shutdown, preventing backfeed and ensuring clean power sequencing in multi-rail systems. |
| Ultra-low shutdown current | 0.1µA draw enables >10-year shelf life in coin-cell–powered backup applications like real-time clocks or SRAM keep-alive. |
| Integrated UVLO with hysteresis | Prevents erratic startup at marginal battery voltages; 40mV hysteresis avoids oscillation near 1.6V cutoff threshold. |
Applications
| White LED Backlighting | Flash Memory Supply |
|---|---|
|
Use Scenario: Powering 3–5 white LEDs in portable LCD displays with varying battery voltage (2.8–4.2V). IC Role / Device Role / Timing Role: Regulated 5.0V current source driver, maintaining constant LED brightness independent of battery sag. Use Value: Enables consistent luminance without PWM dimming circuitry; 125mA output supports parallel LED strings with minimal thermal rise. |
Use Scenario: Providing stable 5.0V VCC to NAND/NOR flash memory in handheld data loggers or IoT edge nodes. IC Role / Device Role / Timing Role: Auxiliary power rail generator decoupled from main system supply, ensuring reliable write/erase cycles during brown-out events. Use Value: ±3% regulation prevents flash programming errors; 0.1µA shutdown eliminates leakage during long-term storage. |
| PCMCIA Card Power | GSM SIM Card Boost Converter |
|
Use Scenario: Generating 5.0V from 3.3V host bus for legacy PCMCIA peripherals in industrial laptops. IC Role / Device Role / Timing Role: Step-down charge pump supplying isolated 5V rail with no magnetic coupling to sensitive host signals. Use Value: Eliminates need for bulky isolated DC-DC modules; µMAX package fits within tight PCMCIA Type II height constraints (5.0mm). |
Use Scenario: Boosting 3.0V battery voltage to 5.0V for GSM SIM card interface compliance in feature phones and M2M modules. IC Role / Device Role / Timing Role: Compact, low-noise 5V supply meeting ETSI TS 102 221 SIM voltage requirements under pulsed load conditions. Use Value: 1MHz switching avoids interference with RF bands; 220µA quiescent current extends talk time in intermittent-use devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge-pump regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1722EUA+T | Single-output 5.0V boost-only charge pump; 100mA max output; no buck capability; 1.2MHz switching. | Lacks step-down mode - unsuitable for inputs >5.0V or wide-input-range battery systems. | Select MAX1722EUA+T only if input stays strictly below 5.0V and board space permits slightly larger solution size. |
| TPS60403DBVR | TI 5.0V boost-only charge pump; 60mA output; 500kHz switching; requires larger 2.2µF COUT for same ripple. | Lower current and frequency limit performance in high-brightness LED or fast-flash applications. | Choose TPS60403DBVR where cost sensitivity outweighs performance needs and 60mA load ceiling is acceptable. |
Compared with MAX1595EUA50+, MAX1722EUA+T offers higher frequency but sacrifices buck functionality and current capability, while TPS60403DBVR provides lower-cost implementation at the expense of output current headroom and regulation tightness - making MAX1595EUA50+ optimal for dual-mode, high-current, space-constrained 5V auxiliary rails.
Availability
MAX1595EUA50+ is available at Aetrix Electronics and suitable for white LED backlighting, flash memory supplies, and PCMCIA card power requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1595EUA50+ 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 belongs to Maxim's charge-pump DC-DC regulator product line, designed specifically for compact, inductorless power conversion in battery-powered miniature equipment where board area and EMI are critical constraints.
FAQ
What is the output voltage tolerance of the MAX1595EUA50+ over temperature and load?
The MAX1595EUA50+ delivers a fixed 5.0V output with guaranteed ±3% regulation across the full operating temperature range (-40°C to +85°C) and load current (0–125mA). This specification is tested and guaranteed per the Electrical Characteristics table in the datasheet, ensuring stable power for precision logic and memory interfaces without external trimming.
Can the MAX1595EUA50+ operate with input voltages above 5.0V?
Yes - the MAX1595EUA50+ supports input voltages from 1.8V to 5.5V and operates in step-down (buck) mode when VIN exceeds VOUT by ~0.7V or more. At VIN = 5.5V, it maintains regulated 5.0V output with typical efficiency >85%, making it suitable for USB-powered or dual-supply systems where input may exceed nominal output.
Does the MAX1595EUA50+ require an inductor?
No - the MAX1595EUA50+ is an inductorless charge-pump regulator. It uses only three external ceramic capacitors (CIN, CX, COUT) to achieve step-up/step-down conversion. This eliminates magnetic components, reduces EMI, saves PCB area, and lowers bill-of-materials cost compared to inductive DC-DC solutions.
How does the MAX1595EUA50+ handle shutdown and load disconnect?
When SHDN is driven low, the MAX1595EUA50+ enters shutdown mode drawing just 0.1µA and actively disconnects the OUT pin from the IN supply. This prevents backfeed and ensures clean power sequencing - critical in multi-rail systems where uncontrolled discharge could disrupt other subsystems or violate safety margins.
What is the role of the AOUT pin on the MAX1595EUA50+?
The AOUT pin on the MAX1595EUA50+ serves as the analog power and sense input for the internal error amplifier. It must be connected directly to the high-side terminal of the output capacitor (COUT) to provide accurate feedback for regulation and minimize output ripple caused by PCB trace inductance or ground bounce.
MAX1595EUA50+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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:
- 8-uMAX/uSOP
MAX1595EUA50+T FAQ
1.How can I place an order for MAX1595EUA50+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1595EUA50+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 MAX1595EUA50+T reliable?
The price and inventory of MAX1595EUA50+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1595EUA50+T is usually 5 days.
3.What payment methods are accepted for MAX1595EUA50+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1595EUA50+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1595EUA50+T?
MAX1595EUA50+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1595EUA50+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 MAX1595EUA50+T?
For technical support, including MAX1595EUA50+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1595EUA50+T requirements.
6.How does Aetrix verify that MAX1595EUA50+T is sourced from the original manufacturer or authorized distributors?
All MAX1595EUA50+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 MAX1595EUA50+T meets industry standards.
7.What is the process for return or replacement of MAX1595EUA50+T?
All MAX1595EUA50+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1595EUA50+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 MAX1595EUA50+T part is unused and in its original packaging.
Return procedure for MAX1595EUA50+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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