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MAX1840EUB from MAXIM,MAXIM - Dallas Semiconductor

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MAX1840EUB

Manufacturer: MAXIM, MAX

Low-Voltage SIM/Smart Card Level Translators in MAX
Partnumber Manufacturer Quantity Availability
MAX1840EUB MAXIM, MAX 4790 In Stock

Description and Introduction

Low-Voltage SIM/Smart Card Level Translators in MAX The MAX1840EUB is a step-down DC-DC converter manufactured by Maxim Integrated. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range:** 2.5V to 5.5V  
- **Output Voltage Range:** Adjustable from 0.8V to VIN  
- **Output Current:** Up to 600mA  
- **Switching Frequency:** 1MHz (fixed)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-pin µMAX (3mm x 5mm)  

### **Descriptions:**  
- The MAX1840EUB is a synchronous step-down DC-DC converter optimized for high efficiency and compact size.  
- It integrates both high-side and low-side MOSFETs, reducing external component count.  
- Suitable for battery-powered applications, portable devices, and low-voltage power supplies.  

### **Features:**  
- **PWM/PFM Mode Operation:** Automatically switches between pulse-width modulation (PWM) and pulse-frequency modulation (PFM) for improved efficiency at light loads.  
- **Low Quiescent Current:** 25µA (typical) in PFM mode.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Short-Circuit Protection:** Includes cycle-by-cycle current limiting.  
- **100% Duty Cycle Operation:** Allows dropout operation when input voltage approaches the output voltage.  
- **Low Dropout Voltage:** Supports extended battery life in portable applications.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Low-Voltage SIM/Smart Card Level Translators in MAX

Alternative Part Number

  • TPS2041BDBVR --: Current-limited power switch in SOT-23-5 with similar voltage/current ratings, pin-compatible footprint, and widely available as a MAX1840 replacement.
  • MIC2026-1YM --: Dual-channel current-limited power distribution switch in SOIC-8 offering comparable current limiting and thermal shutdown features for similar load-switch applications.
  • AP2553W6-7 --: Single-channel current-limited power switch in SOT-26 with adjustable current limit and thermal protection, suitable as a functional substitute for the MAX1840.
  • TPS3808G01DBVR --: Pin-compatible supervisory/reset IC in SOT-23-5 with similar supply monitoring function; widely available and lower cost.
  • ADM809LARTZ-REEL --: Similar microprocessor supervisory circuit in SOT-23 package with comparable reset threshold and open-drain output.
  • MCP1316T-29LE/OT --: SOT-23-5 voltage supervisor with similar reset functionality and threshold, suitable drop-in replacement for many MAX1840 applications.
  • TPS2051BDBVR --: Current-limited USB power switch in SOT-23-5, functionally similar to the MAX1840 USB switch and widely available as a drop-in style replacement.
  • AP2191D --: Single-channel current-limited USB power switch in a small package, offering comparable USB switching and protection functionality.

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