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DC-DC LED Drivers | CAT3661

LED Driver, Low Power, 1-Channel

Obsolete

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Overview

The CAT3661 is a high efficiency low power fractional charge pump that drives one LED with up to 5 mA of current. Soft-start current limiting and short-circuit protection are optimized for use with coin cell batteries.

Low noise input ripple and constant switching frequency allows the use of small external ceramic capacitors. This makes the CAT3661 ideal for EMI sensitive applications. The charge pump supports a wide range of input voltages from 2.0 V to 5.5 V.

The CAT3661 has a built-in circuitry to provide feedback to a microcontroller of Open/Short LED and Low battery events. The Low battery indicator trip point is internally fixed at 2.4 V. External resistors can be added to raise or lower the trip voltage, if needed.

The device is packaged in the tiny 16-lead TQFN 3 mm x 3 mm package with a max height of 0.8 mm.

The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x tri-mode charge pumps with no added external capacitors.

  • Low Power LCD Display Backlight
  • Low Power Handheld Device Backlight

  • Quad Mode Charge Pump: 1x, 1.33x, 1.5x, 2x
  • Drives One LED up to 5 mA
  • Optimized for Coin Cell Battery Operation
  • Open/Short LED Fault Detection
  • Adjustable Low Battery Detection
  • Low Quiescent Current 150 A Typical
  • Power Efficiency up to 92%
  • Low Noise Input Ripple in All Modes
  • Zero Current Shutdown Mode
  • Soft Start and Short Circuit Current Limiting
  • Thermal Shutdown Protection

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CAT3661HV3-GT2

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Obsolete

CAD Model

Pb

A

H

P

TQFN-16

510AD

1

260

REEL

2000

N

Charge Pump

2

5.5

6

6

100

Price N/A

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Reliability Data

Die Related Summary Data

Device: CAT3661HV3-GT2

Equivalent to wafer fab process: CMOS SUB

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

CMOS SUB

2

920154574

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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