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Analog Devices Inc./Maxim Integrated MAX1595ETC50+
- Part No.:
- MAX1595ETC50+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WQFN Exposed Pad
- Datasheet:
-
MAX1595ETC50+.pdf
- Description:
- IC REG CHRG PUMP 5V 125MA 12TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,436
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Product details
Overview
MAX1595ETC50+ from Maxim Integrated is a regulated 5.0V step-up/step-down charge-pump DC-DC converter for battery-powered systems, delivering up to 125mA output current from 1.8V–5.5V input, with ±3% output regulation, 1MHz switching frequency, and no inductor requirement. It serves as compact auxiliary supply in PCMCIA cards, white LED backlighting, and GSM SIMM cards.
For engineers reviewing the MAX1595ETC50+ datasheet, MAX1595ETC50+ pinout, MAX1595ETC50+ application, or MAX1595ETC50+ equivalent, key selection considerations include its fixed 5.0V output, TQFN-EP package thermal performance (θJA = 41°C/W), shutdown current of 5µA, and buck-boost capability across varying input voltages without external inductors.
Technical Context
The MAX1595ETC50+ implements a dual-mode switched-capacitor architecture: in boost mode, it doubles input voltage via charge transfer; in buck mode, it regulates down from inputs >5.0V using S1/S2 MOSFET switching controlled by an internal error amplifier and 1.23V bandgap reference. Regulation is maintained across 0–125mA load range.
Its control scheme enables constant 1MHz operation under medium-to-heavy loads and transitions smoothly to low-power mode at light loads. The AOUT pin provides analog power/sense connection to the output filter capacitor for precise feedback, while PGND and GND separation minimizes noise coupling in high-current paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±3% - ensures stable rail for logic or analog circuitry without external resistor network. |
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion (3.0–4.2V), NiMH (1.8–2.4V), or partially discharged alkaline sources. |
| Max Output Current | 125mA - sufficient to drive 3–5 white LEDs in series or power flash memory VCC pins. |
| Switching Frequency | 1.0MHz (±15%) - enables use of 0.22µF ceramic CX and 1µF COUT, minimizing board area vs. lower-frequency pumps. |
| Quiescent Current | 240µA (TYP at VIN=3.0V) - extends battery life in always-on auxiliary supply applications. |
| Shutdown Current | 5µA - reduces system standby drain when host controller asserts SHDN low. |
| UVLO Threshold | 1.60V (with 40mV hysteresis) - prevents erratic operation during brown-out and ensures clean restart above 1.64V. |
Pinout & Package
MAX1595ETC50+ is housed in a 12-pin TQFN-EP package (4mm × 4mm × 0.8mm) with exposed pad (EP) internally connected to GND for enhanced thermal dissipation (θJC = 6°C/W). The EP must be soldered to a large PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOUT | Analog power/sense input to error amplifier | Connects directly to COUT's output node for accurate feedback; decouples analog reference from noisy power ground. |
| SHDN | Digital enable/disable control input | Active-high logic: drives device into 5µA shutdown with output disconnect from IN when pulled low. |
| IN | Main power input (pins 2 & 3) | Accepts 1.8–5.5V; requires local 1µF ceramic bypass to GND; shared between input path and charge pump switching. |
| GND | Analog ground reference (pin 4) | Reference for internal bandgap and error amplifier; separate from PGND to avoid switching noise injection. |
| PGND | Power ground return (pins 5, 6) | High-current return path for CXN/CXP switching and OUT discharge; must tie to GND only at single point near CIN. |
| CXN | Negative terminal of transfer capacitor (pins 7, 8) | Swings between ~0V and VIN during charge/discharge cycles; connects to negative side of 0.22µF CX. |
| CXP | Positive terminal of transfer capacitor (pin 9) | Swings between VIN and ~VIN + VOUT during pumping; connects to positive side of 0.22µF CX. |
| OUT | Regulated 5.0V output (pins 10, 11) | Delivers up to 125mA; requires 1µF ceramic COUT placed adjacent to pin; used for powering downstream ICs or LEDs. |
| EP | Exposed thermal pad (not electrically active) | Internally tied to GND; mandatory solder connection to PCB ground plane for thermal reliability at full load. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates EMI-sensitive magnetics and saves >30mm² board area versus inductive boost converters. |
| Load disconnect in shutdown | Prevents backfeed from OUT to IN, protecting upstream battery or LDO during system sleep. |
| Buck-boost regulation | Maintains 5.0V output whether input is 2.0V (boost) or 5.3V (buck), enabling single-rail flexibility in mixed-voltage systems. |
| Ultra-low shutdown current | 5µA draw allows multi-year shelf life in backup-battery or energy-harvesting applications. |
| Thermally optimized TQFN-EP | 41°C/W θJA enables 125mA continuous output at +70°C ambient without forced airflow. |
Applications
| White LED Backlighting | Flash Memory Supply |
|---|---|
|
Use Scenario: Powering 3–5串联 white LEDs in portable LCD displays with variable battery voltage (2.8–4.2V). IC Role / Device Role / Timing Role: Regulated 5.0V current source driver with constant-frequency charge pumping. Use Value: Maintains uniform LED brightness across battery discharge curve without requiring PWM dimming or external current regulators. |
Use Scenario: Providing stable 5.0V VCC to NAND/NOR flash memory in handheld devices during read/write cycles. IC Role / Device Role / Timing Role: Auxiliary voltage rail generator with fast line-transient response (<200µs recovery). Use Value: Prevents flash corruption during sudden input dips (e.g., RF transmit bursts) due to tight 5.0V ±3% tolerance and low output impedance. |
| PCMCIA Card Power | GSM SIMM Card Boost |
|
Use Scenario: Generating 5.0V from 3.3V host bus for legacy PCMCIA peripherals in laptops or industrial controllers. IC Role / Device Role / Timing Role: Step-down charge pump operating in buck mode with minimal external components. Use Value: Enables backward compatibility with 5V-only PCMCIA cards without redesigning host power architecture or adding discrete regulators. |
Use Scenario: Boosting 3.0V battery rail to 5.0V for GSM SIMM card interface logic in mobile handsets. IC Role / Device Role / Timing Role: Compact, low-noise 5.0V supply with integrated soft-start to prevent SIM reset glitches. Use Value: Guarantees reliable SIM detection and communication during cold start, even with weak batteries (≥2.3V with tripler mod). |
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 5.0V output and core architecture, but in 8-pin µMAX package (θJA = 206.3°C/W, max 75mA continuous). | Suitable for space-constrained layouts where thermal budget permits lower output current. | Select MAX1595EUA50+ only if board area is critical and load stays ≤75mA; otherwise MAX1595ETC50+ delivers higher current with better thermal margin. |
| TPS60403DBVR | Fixed 5.0V output, 60mA max, 1.1MHz, SOT-23-5 package; lacks buck capability and UVLO hysteresis. | Targeted at ultra-low-power, low-current applications where input never exceeds 5.0V. | Choose TPS60403DBVR only for sub-60mA loads with strictly boost-only requirements and minimal board footprint; not suitable for buck operation or 125mA demand. |
Compared with MAX1595EUA50+, MAX1595ETC50+ offers 67% higher output current and 80% lower thermal resistance, making it preferred for sustained 125mA loads; versus TPS60403DBVR, it adds buck regulation, higher current, and tighter UVLO control-critical for battery-varying systems.
Availability
MAX1595ETC50+ is available at Aetrix Electronics and suitable for white LED backlighting, flash memory supplies, and GSM SIMM card boost applications requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for MAX1595ETC50+ 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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.
The MAX1595 belongs to Maxim's charge-pump DC-DC regulator product line, engineered specifically for compact, inductorless power conversion in battery-powered portable equipment with dynamic input voltage ranges.
FAQ
What is the output voltage accuracy of the MAX1595ETC50+ over temperature and load?
The MAX1595ETC50+ delivers 5.0V output with ±3% regulation across -40°C to +85°C ambient temperature and 0–125mA load range. At TA = 0°C to +85°C and 0 < ILOAD < 125mA with VIN = +3.0V, the typical output is 4.98V, bounded by min 4.85V and max 5.15V per datasheet specifications. This accuracy eliminates need for external trimming in most portable applications.
Can the MAX1595ETC50+ operate with input voltage higher than its 5.0V output?
Yes, the MAX1595ETC50+ supports true buck-boost operation: when input exceeds 5.0V (e.g., 5.3V), it enters buck mode by continuously connecting S1 to IN and alternating S2 between IN and OUT, transferring charge proportional to (VIN – VOUT) to maintain regulation. This avoids linear dropout losses seen in LDOs and enables single-supply flexibility.
What is the minimum external capacitor set required for basic operation of the MAX1595ETC50+?
The MAX1595ETC50+ requires exactly three ceramic capacitors: 1µF input capacitor (CIN) on IN-to-GND, 0.22µF transfer capacitor (CX) between CXP and CXN, and 1µF output capacitor (COUT) on OUT-to-GND. No inductor or additional compensation components are needed-this minimal BOM enables rapid prototyping and ultra-compact layout.
How does the MAX1595ETC50+ handle shutdown and output disconnection?
When SHDN is driven low, the MAX1595ETC50+ draws only 5µA supply current and actively disconnects the OUT pin from IN via internal switches-preventing backfeed and ensuring true load isolation. Upon SHDN high assertion, soft-start activates, ramping output over ≤2ms to avoid inrush current and system reset events.
Is the exposed pad (EP) on the MAX1595ETC50+ TQFN package electrically functional?
No, the exposed pad (EP) on the MAX1595ETC50+ is thermally connected to GND internally but is not intended as an electrical connection point. It must be soldered to a large PCB ground plane to achieve specified θJA = 41°C/W and sustain 125mA continuous output; floating or unconnected EP degrades thermal performance and risks thermal shutdown.
MAX1595ETC50+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WQFN Exposed Pad
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX1595ETC50+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1595ETC50+ 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+ reliable?
The price and inventory of MAX1595ETC50+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1595ETC50+ is usually 5 days.
3.What payment methods are accepted for MAX1595ETC50+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1595ETC50+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1595ETC50+?
MAX1595ETC50+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1595ETC50+ 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+?
For technical support, including MAX1595ETC50+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1595ETC50+ requirements.
6.How does Aetrix verify that MAX1595ETC50+ is sourced from the original manufacturer or authorized distributors?
All MAX1595ETC50+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1595ETC50+?
All MAX1595ETC50+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1595ETC50+, 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+ part is unused and in its original packaging.
Return procedure for MAX1595ETC50+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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