MIC2871 Ver la hoja de datos (PDF) - Micrel
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MIC2871 Datasheet PDF : 24 Pages
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Micrel, Inc.
MIC2871
Absolute Maximum Ratings(2)
Input Voltage (VIN) ........................................ −0.3V to +6.0V
General I/O Voltage (VFEN1, VFEN2) .................... −0.3V to VIN
VOUT and VLED Voltage.................................. −0.3V to +6.0V
Single-Wire I/O Voltage (VDC) ........................... −0.3V to VIN
VFRSET Voltage ................................................... −0.3V to VIN
VSW Voltage .................................................. −0.3V to +6.0V
Lead Temperature (soldering, 10s).......................... +260°C
Junction Temperature ................................... 0°C to +150°C
Storage Temperature (Ts) ......................... −40°C to +150°C
ESD Rating(5)............................... 2kV, HBM and 200V, MM
Operating Ratings(3)
Input Voltage (VIN) .......................................... 2.7V to +5.5V
Enable Input Voltage (VFEN1, VFEN2) ....................... 0V to VIN
Single-Wire I/O Voltage (VDC) ................................ 0V to VIN
Junction Temperature (TJ) ........................ −40°C to +125°C
Power Dissipation (PD) ........................... Internally Limited(4)
Package Thermal Resistance
3mm × 2mm LDFN (θJA)(4) ............................65.83°C/W
3mm × 2mm LDFN (θJC)(4) ..............................................38.9°C/W
Electrical Characteristics(6)
VIN = 3.6V, L = 1µH, COUT = 4.7µF, RFRSET = 20.5kΩ, IOUT = 100mA, TA = 25°C, bold values indicate -40°C ≤ TJ ≤ +125°C,
unless otherwise noted..
Symbol Parameter
Condition
Min. Typ. Max. Units
Power Supply
VIN
VSTART
VUVLO
ISTB
Supply Voltage Range
Start-Up Voltage
UVLO Threshold (falling)
Standby Current
VDC = HIGH, boost regulator and LED current
driver both OFF.
2.7
5.5
V
2.65 2.95 V
2.30 2.5
V
230
µA
ISD
VOVP
Shutdown Current
Overvoltage Protection (OVP)
Threshold
VDC = 0V
1
2
µA
5.2
5.37 5.55
V
OVP Hysteresis
60
mV
OVP Blanking Time
23
µs
DMAX
ISW
Maximum Duty Cycle
Switch Current Limit
VIN = VOUT = 2.7V
82
86
90
%
3.5
4.5
5.5
A
DMIN
Minimum Duty Cycle
4
6.4
9
%
PMOS
NMOS
Switch On-Resistance
ISW = 100mA
ISW = 100mA
100
mΩ
ISW
Switch Leakage Current
VDC = 0V, VSW = 5.5V
0.01
1
µA
FSW
Oscillator Frequency
2
MHz
Oscillator Frequency Variation
−10
10
%
Notes:
2. Exceeding the absolute maximum rating may damage the device.
3. The device is not guaranteed to function outside its operating rating.
4. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA.
Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
5. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
6. Specification for packaged product only.
May 29, 2013
3
052913-1.0 (while in progress)
Revision 1.0 (final document)
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