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MIC3287

1.2MHz PWM White LED Driver w/ 24V OVP

Status: In Production

Features:

  • 2.8V to 6.5V input voltage
  • 350mA switch current
  • 1.2MHz PWM operation
  • 250mV feedback voltage
  • Optional 24V output over voltage protection (OVP)
  • <1% line and load regulation
  • <1µA shutdown current
  • Over-temperature protection
  • Under voltage lockout (UVLO)
  • Low profile Thin SOT-23-5 package option
  • Low profile Thin SOT-23-6 package option
  • 8-pin 2mm x 2mm MLF®package option
  • -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 MIC3287 is a 1.2MHz pulse-width modulated (PWM) step-up switching regulator that is optimized for constant current white LED driving applications. With a maximum output voltage of 24V and a switch current of over 350mA, the MIC3287 drives a string of up to four white LEDs in series, ensuring uniform brightness and eliminating several ballast resistors.

The MIC3287 implements a constant frequency 1.2MHz PWM current-mode control scheme. The high frequency PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM control scheme as opposed to variable frequency control schemes is much lower noise and input ripple injected back to the battery source. To optimize efficiency, the feedback voltage is set to only 250mV. The MIC3287 is also available with a maximum 24V over voltage protection.

The MIC3287 is available in low profile Thin SOT-23 5-pin and Thin SOT-23 6-pin packages. The MIC3287 has a junction temperature range of -40°C to +125°C.

Additional Features
    • 2.8V to 6.5V input voltage
    • 350mA switch current
    • 1.2MHz PWM operation
    • 250mV feedback voltage
    • Optional 24V output over voltage protection (OVP)
    • <1% line and load regulation
    • <1µA shutdown current
    • Over-temperature protection
    • Under voltage lockout (UVLO)
    • Low profile Thin SOT-23-5 package option
    • Low profile Thin SOT-23-6 package option
    • 8-pin 2mm x 2mm MLF®package option
    • -40°C to +125°C junction temperature range
Parametrics
Name
Value
Topology
Boost
+Vin min (V)
2.8
+Vin max (V)
6.5
Output Current
1A BJT
Dimming
PWM / Analog
Package
TSOT, VDFN
Product Type
LED Backlight
VOUT
36
llim Typ (A)
0.35
lq Typ
2.1mA
Vfb (V)
0.25
Tol Typ %
±7.5
Duty Cycle Max
0.9
Freq (Hz)
1.2M
OVP
Yes
VEN (V)
1.5
EN
Yes
Soft Start
Yes
UVLO Typ (V)
Yes
Ceramic Cap
Yes
Θja (C/W)
207, 134, 90

Documents

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC3287YD5-TR
0.012600
0.149200
5
TSOT
-
NiPdAu
e4
MIC3287YD5-TX
0.012600
0.038333
5
TSOT
-
NiPdAu
e4
MIC3287-24YD6-TX
0.038333
6
TSOT
2.9x1.6x1.0mm
NiPdAu
e4
MIC3287-24YD6-TR
0.149600
6
TSOT
2.9x1.6x1.0mm
NiPdAu
e4
MIC3287-24YML-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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