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Analog Devices Inc./Maxim Integrated MAX1595EGC33
- Part No.:
- MAX1595EGC33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WQFN Exposed Pad
- Datasheet:
-
MAX1595EGC33.pdf
- Description:
- IC REG CHARGE PUMP 3.3V 12TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,124
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Product details
Overview
MAX1595EGC33 from Maxim Integrated is a regulated 3.3V step-up/step-down charge-pump DC-DC converter supporting 1.8V–5.5V input, delivering up to 75mA output current with ±3% regulation accuracy and 1MHz switching frequency. It operates without inductors, uses only three ceramic capacitors, and features load disconnect during shutdown - ideal for compact white LED biasing and flash memory supply in battery-powered miniature equipment.
For engineers reviewing the MAX1595EGC33 datasheet, MAX1595EGC33 pinout, MAX1595EGC33 application, or MAX1595EGC33 equivalent, key selection considerations include its buck-boost capability across varying battery voltages, ultra-low 0.1µA shutdown current, and compatibility with space-constrained µMAX and thin QFN packages.
Technical Context
The MAX1595EGC33 employs a dual-mode charge-pump architecture that dynamically switches between step-up and step-down operation based on input-to-output voltage relationship - enabling regulation even when VIN exceeds VOUT by >0.7V (buck mode) or falls below it (boost mode). Its internal 1.23V bandgap reference and error amplifier drive high-current MOSFET switches (S1/S2) controlled by a constant-frequency oscillator.
Regulation is achieved via charge transfer from CX (0.22µF typical) to COUT (1µF), with ripple approximated as VRIPPLE ≅ IOUT/(2 × fOSC × COUT). The AOUT pin provides analog power/sense connection to the error amplifier, while PGND and GND are separately routed to minimize noise coupling in high-efficiency operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% - ensures stable bias for 3.3V logic rails and white LEDs without external feedback. |
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, NiMH, and multi-cell alkaline battery inputs. |
| Max Output Current | 75mA at 3.3V - sufficient for driving 3–5 white LEDs in series or powering low-power flash memory. |
| Switching Frequency | 1MHz - enables use of small 0.22µF ceramic transfer capacitor and reduces EMI filtering burden. |
| Quiescent Current | 220µA typical - minimizes standby drain in always-on portable systems. |
| Shutdown Current | 0.1µA - preserves battery life during extended sleep periods. |
| Undervoltage Lockout | 1.6V threshold with 40mV hysteresis - prevents erratic operation during brownout conditions. |
Pinout & Package
MAX1595EGC33 is housed in a 12-pin thin QFN package (4mm × 4mm × 0.8mm), RoHS-compliant, with exposed thermal pad (PGND-connected) for enhanced power dissipation up to 1481mW at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AOUT (Pin 1) | Analog Power & Sense Input | Connects to OUT at output capacitor; supplies clean analog reference path for error amplifier. |
| SHDN (Pin 2) | Active-High Shutdown Control | Drives high (>1.6V) to enable; low (<0.6V) disables regulator and disconnects OUT from IN. |
| IN (Pins 3,4) | Main Power Input | Accepts 1.8V–5.5V supply; bypassed to GND with 1µF ceramic capacitor. |
| GND (Pin 5) | Digital Ground Reference | Reference for SHDN, logic, and oscillator; kept separate from PGND to reduce noise coupling. |
| PGND (Pins 6,7) | Power Ground Return | High-current return path for internal switches and CX; tied to thermal pad for thermal management. |
| CXN (Pins 8,9) | Negative Transfer Capacitor Terminal | Connects to negative side of 0.22µF charge-transfer capacitor (CX). |
| CXP (Pin 10) | Positive Transfer Capacitor Terminal | Connects to positive side of CX; switched between IN and OUT depending on operating mode. |
| OUT (Pins 11,12) | Regulated Output | Delivers 3.3V ±3%; bypassed to PGND with 1µF ceramic capacitor for low-ripple performance. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Eliminates magnetic components and associated EMI, simplifying layout and reducing BOM count to just three ceramic capacitors. |
| Buck-boost regulation | Maintains 3.3V output whether input is 1.8V (boost) or 4.2V (buck), extending usable battery range in portable devices. |
| Load disconnect in shutdown | Prevents backfeed from output to input, protecting upstream battery or power source during system sleep. |
| Ultra-low shutdown current | 0.1µA draw ensures <1µAh/month battery drain - critical for long-life coin-cell or energy-harvesting applications. |
| Thermal-enhanced QFN | 12-pin thin QFN with exposed PGND pad delivers 4× higher power dissipation than 8-pin µMAX, supporting higher continuous loads. |
Applications
| White LED Backlighting | Flash Memory Supply |
|---|---|
Use Scenario: Powering 3–5串联 white LEDs in handheld PDAs or barcode scanners with single-cell Li-ion (2.7V–4.2V). IC Role / Device Role / Timing Role: Regulated 3.3V charge-pump supply providing constant current via external resistor, independent of battery voltage sag. Use Value: Enables uniform brightness across full battery discharge curve without requiring complex current-source circuitry. |
Use Scenario: Generating stable 3.3V rail for NAND/NOR flash memory in PCMCIA cards or embedded storage modules. IC Role / Device Role / Timing Role: Auxiliary voltage source meeting JEDEC tVR (voltage ramp) and tPU (power-up delay) requirements during cold boot. Use Value: Meets 3.3V ±5% tolerance and fast startup (<2ms soft-start) needed for reliable flash initialization. |
| Battery-Powered Miniature Equipment | GSM SIM Card Power |
Use Scenario: Compact medical sensors or wireless transceivers powered by CR2032 coin cell (2.0V–3.0V). IC Role / Device Role / Timing Role: Step-up converter maintaining 3.3V output down to 1.8V input, enabling full functionality until battery depletion. Use Value: Extends operational runtime by >25% compared to linear regulators, with no inductor size penalty. |
Use Scenario: Providing regulated 3.3V to GSM SIM cards in feature phones where main supply may be unregulated 2.8V–4.2V. IC Role / Device Role / Timing Role: Buck-boost regulator compliant with ISO/IEC 7816-3 SIM voltage requirements and transient response specs. Use Value: Guarantees 3.3V ±3% under dynamic load steps (e.g., RF transmit bursts), preventing SIM reset or communication loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge-pump regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1595EUA33 | Same core IC, but in 8-pin µMAX (3mm × 3mm); lower thermal rating (362mW vs. 1481mW). | Suitable for lower-current designs (<50mA) or space-limited layouts where thermal margin is adequate. | Select when board area is more constrained than power demand, and peak load stays below 50mA. |
| TPS60403DBVR | TI 3.3V fixed-output charge pump; 60mA max output; 1.6V–5.5V input; no buck mode; requires same 3-capacitor setup. | Lacks step-down capability - fails to regulate if VIN > 3.3V, limiting use to pure boost scenarios. | Choose only for strictly boost-only applications with ≤60mA load and no need for VIN > VOUT operation. |
Compared with MAX1595EUA33, the MAX1595EGC33 offers 4× higher power dissipation and better thermal performance in high-duty-cycle LED or flash applications; versus TPS60403DBVR, it uniquely supports both step-up and step-down modes, making it viable across wider battery voltage ranges without redesign.
Availability
MAX1595EGC33 is available at Aetrix Electronics and suitable for white LED backlighting, flash memory supplies, and battery-powered miniature equipment requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for MAX1595EGC33 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 designed specifically for compact, inductorless power conversion in portable electronics - emphasizing ultra-small footprint, wide input range, and seamless buck-boost transition without external control logic.
FAQ
What is the output voltage tolerance of the MAX1595EGC33?
The MAX1595EGC33 delivers a fixed 3.3V output with ±3% regulation accuracy over temperature (-40°C to +85°C), load (0–75mA), and input voltage (1.8V–5.5V). This tolerance is guaranteed by internal resistive feedback and a precision 1.23V bandgap reference, eliminating need for external trimming components in the MAX1595EGC33 design.
Does the MAX1595EGC33 support both step-up and step-down operation?
Yes, the MAX1595EGC33 supports true buck-boost regulation: it steps up input voltages below 3.3V (e.g., 1.8V → 3.3V) and steps down inputs above 3.3V (e.g., 4.2V → 3.3V) using the same internal charge-pump topology. This dual-mode behavior is enabled by its unique control architecture and verified in the MAX1595EGC33 datasheet Figure 1 and Detailed Description section.
What external components are required for basic operation of the MAX1595EGC33?
The MAX1595EGC33 requires exactly three external ceramic capacitors: a 1µF input capacitor (CIN) on IN-to-GND, a 0.22µF charge-transfer capacitor (CX) between CXP and CXN, and a 1µF output capacitor (COUT) on OUT-to-PGND. No inductor, diode, or feedback resistor is needed - confirmed in the MAX1595EGC33 Typical Operating Circuit (Figure 4) and Applications Information section.
How does shutdown work on the MAX1595EGC33, and what happens to the output?
Driving SHDN low places the MAX1595EGC33 into shutdown mode, reducing supply current to 0.1µA. Crucially, the MAX1595EGC33 disconnects the OUT pin from IN during shutdown - preventing backfeed and ensuring true load isolation. This behavior is explicitly documented in the MAX1595EGC33 Shutdown section and Pin Description table.
Is the MAX1595EGC33 RoHS-compliant?
No, the MAX1595EGC33 is not RoHS/lead-free compliant, as confirmed in the Part Number Table on the Maxim website: "RoHS/Lead-Free? No" for MAX1595EGC33 and MAX1595EGC33-T. For lead-free alternatives, consider MAX1595ETC33+ (12-pin thin QFN, RoHS-compliant) or MAX1595EUA33+ (8-pin µMAX, RoHS-compliant), both delivering identical 3.3V regulation.
MAX1595EGC33 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WQFN Exposed Pad
- Packaging:
- Bulk
- 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 125mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TQFN (4x4)
MAX1595EGC33 FAQ
1.How can I place an order for MAX1595EGC33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1595EGC33 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 MAX1595EGC33 reliable?
The price and inventory of MAX1595EGC33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1595EGC33 is usually 5 days.
3.What payment methods are accepted for MAX1595EGC33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1595EGC33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1595EGC33?
MAX1595EGC33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1595EGC33 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 MAX1595EGC33?
For technical support, including MAX1595EGC33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1595EGC33 requirements.
6.How does Aetrix verify that MAX1595EGC33 is sourced from the original manufacturer or authorized distributors?
All MAX1595EGC33 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 MAX1595EGC33 meets industry standards.
7.What is the process for return or replacement of MAX1595EGC33?
All MAX1595EGC33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1595EGC33, 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 MAX1595EGC33 part is unused and in its original packaging.
Return procedure for MAX1595EGC33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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