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MIC2289

White LED Driver w/ 34V OVP

Status: In Production

Features:

  • 2.5V to 10V input voltage
  • Output voltage up to 34V
  • Internal Schottky diode
  • 15V, 24V, 34V output OVP options
  • 1.2MHz PWM operation
  • Over 500mA switch current
  • 95mV feedback voltage
  • <1% line and load regulation
  • <1µA shutdown current
  • Overtemperature protection
  • UVLO
  • -40°C to +125°C junction temperature range
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MIC2289 is a PWM (pulse width modulated), boost-switching regulator that is optimized for constant-current white LED driver applications. The MIC2289 features an internal Schottky diode and three levels of output overvoltage protection providing a small size and efficient DC/DC solution that requires only four external components.

To optimize efficiency, the feedback voltage is set to only 95mV. This reduces power dissipation in the current set resistor and allows the lowest total output voltage, hence minimal current draw from the battery.

The MIC2289 implements a constant frequency 1.2MHz PWM control scheme. The high frequency, PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM scheme in caparison to variable frequency is much lower noise and input ripple injected to the input power source.

The MIC2289 clamps the output voltage in case of open LED conditions, protecting itself and the output capacitor. The MIC2289 is available with three output OVP options of 15V, 24V, and 34V. The different OVP options allows the use of the smallest possible output capacitor with the appropriate voltage rating for a given application.

The MIC2289 has a junction temperature range of -40°C to +125°C.

Additional Features
    • 2.5V to 10V input voltage
    • Output voltage up to 34V
    • Internal Schottky diode
    • 15V, 24V, 34V output OVP options
    • 1.2MHz PWM operation
    • Over 500mA switch current
    • 95mV feedback voltage
    • <1% line and load regulation
    • <1µA shutdown current
    • Overtemperature protection
    • UVLO
    • -40°C to +125°C junction temperature range
Parametrics
Name
Value
Topology
Boost
+Vin min (V)
2.5
+Vin max (V)
10
Output Current
2A BJT
Dimming
PWM / Analog
Package
TSOT, VDFN
Product Type
LED Backlight
VOUT
34
llim Typ (A)
0.75
lq Typ
2.5mA
Int Diode
Yes
Vfb (V)
0.095
Tol Typ %
±5
Duty Cycle Max
0.9
Freq (Hz)
1.2M
OVP
Yes
VEN (V)
1.5
EN
Yes
Soft Start
Yes
UVLO Typ (V)
2.1
Ceramic Cap
Yes
Θja (C/W)
177, 90

Documents

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC2289-24YD6-TR
0.012400
0.149600
6
TSOT
2.9x1.6x1.0mm
NiPdAu
e4
MIC2289C-34YD6-TR
0.012400
0.149600
6
TSOT
2.9x1.6x1.0mm
NiPdAu
e4
MIC2289-24YD6-TX
0.012400
0.038333
6
TSOT
2.9x1.6x1.0mm
NiPdAu
e4
MIC2289C-34YD6-TX
0.012400
0.038333
6
TSOT
2.9x1.6x1.0mm
NiPdAu
e4
MIC2289-24YML-TR
0.010900
0.339227
8
VDFN
2x2x0.9mm
NiPdAu
e4
MIC2289-34YML-TR
0.010900
0.339227
8
VDFN
2x2x0.9mm
NiPdAu
e4
MIC2289-15YML-TR
0.010900
0.339227
8
VDFN
2x2x0.9mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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