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LM3485

Features: Easy to use control methodology 0.8V to VIN adjustable output rangeHigh Efficiency (90% typical)±0.9% (±1.5% over temp) feedback voltage100% duty cycle capableMaximum operating frequency up to 2MHz Internal Soft-Start Enable pinSOT23-5 packageApplication TFT Monitor Auto PCVehicle Secur...

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SeekIC No. : 004395344 Detail

LM3485: Features: Easy to use control methodology 0.8V to VIN adjustable output rangeHigh Efficiency (90% typical)±0.9% (±1.5% over temp) feedback voltage100% duty cycle capableMaximum operating frequency ...

LM3485 Data Sheet

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Part Number:
LM3485
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

Easy to use control methodology
0.8V to VIN adjustable output range
High Efficiency (90% typical)
±0.9% (±1.5% over temp) feedback voltage
100% duty cycle capable
Maximum operating frequency up to 2MHz
Internal Soft-Start
Enable pin
SOT23-5 package




Application

TFT Monitor
Auto PC
Vehicle Security
Navigation Systems
Notebook Standby Supply
Battery Powered Portable Applications
Distributed Power Systems




Pinout

Connection Diagram




Specifications

Output Current 4000 mA
Input Min Voltage 4.5 Volt
Input Max Voltage 35 Volt
Output Range 1.242V to Vin
Frequency Min 0 kHz
Frequency Max 1400 kHz
Feedback Voltage 1.27 Volt
Feedback Tolerance 2 %
Efficiency (peak) 93 %
Adj Switch Frequency Yes
Adjustable Output Yes
Synchronous Rectification No
On/Off Pin No
Error Flag No
SoftStart No
Sync Pin No
Inverting No
Flyback No
Lossless Current Sense Yes
RegType Switching Controller
Temperature Min -40 deg C
Temperature Max 125 deg C
Channels 1 Channels
Special Features No compensation required; Current limit; PFET controller
Topology Buck
PWM Mode Hysteretic
Step-Down Yes
Step-Up No
Output Min 1.242 Volt
Automotive Selection Guide Yes
View Using Catalog


VIN
PGATE
FB
EN
Storage Temperature
Power Dissipation (Note 2)
ESD Susceptibilty
Human Body Model (Note 3)
Lead Temperature
Vapor Phase (60 sec.)
Infared (15 sec.)
−0.3V to 16V
−0.3V to 16V
−0.3V to 5V
−0.3V to 16V
−65°C to 150°C
440mW
2.5kV

215°C
220°C





Description

The LM3485 is a hysteretic P-FET buck controller designed to support a wide range of high efficiency applications in very small SOT23-5 package. The hysteretic control scheme has several advantages, including simple system design with no external compensation, stable operation with a wide range of components, and extremely fast transient response. Hysteretic control also provides high efficiency operation, even at light loads. The PFET architecture allows for low component count as well as 100% duty cycle and ultralow dropout operation.






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