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LINEAR TECHNOLOGY  LTC4425EMSE#PBF  Special Function IC, Constant Current / Constant Voltage Linear Charger, 2.7 V to 5.5 V, MSOP-12

LINEAR TECHNOLOGY LTC4425EMSE#PBF
Manufacturer Part No:
LTC4425EMSE#PBF
Order Code:
1839114
Technical Datasheet:
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Image is for illustrative purposes only. Please refer to product description.

Product Overview

The LTC4425EMSE#PBF is a linear SuperCap Charger with current-limited ideal diode and V/I monitor. This constant-current/constant-voltage linear charger is designed to charge a 2-cell supercap stack from either a Li-ion/Polymer battery, an USB port. The part operates as an ideal diode with an extremely low 50mR on-resistance making it suitable for high peak-power/low average power applications. The LTC4425 charges the output capacitors to an externally programmed output voltage in LDO mode at a constant charge current or to VIN in normal mode with a smart charge current profile to limit the inrush current until the VIN to VOUT differential is less than 250mV. In addition the LTC4425 can be set to clamp the output voltage to 4.9 or 5.4V. Charge current (VOUT current limit) is programmed by connecting a resistor between PROG and GND. The voltage on the PROG pin represents the current flowing from VIN to VOUT for current monitoring.
  • 50mR Ideal diode from VIN to VOUT
  • Smart charge current profile limits inrush current
  • Internal cell balancer (no external resistors)
  • Programmable output voltage (LDO mode)
  • Programmable VIN to VOUT current limit
  • Continuous monitoring of VIN to VOUT current via PROG Pin
  • Low quiescent current (20µA)
  • VIN power fail, PGOOD indicator
  • 2.45/2.7V Cell protection shunts (4.9/5.4V SuperCap maximum top-off voltage)
  • 3A Peak current limit, thermal limiting

Product Information

IC Function:
Linear SuperCap Charger, Voltage & Current Monitor
Supply Voltage Min:
2.7V
Supply Voltage Max:
5.5V
IC Package Type:
MSOP
No. of Pins:
12Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Each
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Power Management
  • Industrial
  • Communications & Networking
  • Portable Devices
  • Computers & Computer Peripherals

Legislation and Environmental

Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.0002

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