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MIC2267 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part # MIC2267
Description  Input Current Limiting Synchronous Buck Regulator
Download  19 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2267 Datasheet(HTML) 3 Page - Micrel Semiconductor

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Micrel Inc.
MIC2267
January 2011
3
M9999-011711-A
Absolute Maximum Ratings (1)
Supply Voltage (VIN)........................................ −0.3V to +6V
Output Switch Voltage (VSW) ........................... −0.3V to +6V
Power Good Voltage (VPGOOD) ........................ −0.3V to +6V
Enable Input Voltage (VEN)................................ −0.3V to VIN
Feedback Voltage (VFB) .................................... −0.3V to VIN
AGND to PGND Voltage ..............................
−0.3V to +0.3V
Switch Current (ISW) .................................Internally Limited
Power Dissipation .....................................Internally Limited
Lead Temperature (soldering, 10sec.)....................... 260°C
Storage Temperature (Ts) .........................−65°C to +150°C
ESD Human Body Model Rating
(3) ................................2kV
ESD Machine Model Rating
(3) .....................................200V
Operating Ratings (2)
Supply Voltage (VIN)..................................... +3.0V to +5.5V
Power Good Voltage (VPGOOD) ......................... 0V to +5.5V
Enable Input Voltage (VEN) .................................... 0V to VIN
Feedback Voltage (VFB) ........................................ 0V to VIN
AGND to PGND Voltage ..............................
−0.3V to +0.3V
Junction Temperature (TJ) ........................–40°C to +125°C
Junction Thermal Resistance
3mm x 3mm MLF
®-12(θJA).................................61°C/W
3mm x 3mm MLF
®-12(θJC).................................27°C/W
Electrical Characteristics (4)
VIN = VEN = 5.0V, VOUT = 3.3V, ILOAD = 10mA, CIN = 10µF, L = 4.7µH, COUT = 47µF, RFREQ = 100kΩ; RSLOPEC = 100kΩ, RLIM = 100kΩ,
RCOMP = 11.5kΩ, CCOMP = 15nF, TA = 25°C; bold values indicate –40°C ≤ TJ ≤ 125°C; unless noted.
Parameter
Conditions
Min.
Typ.
Max.
Units
Power Input Supply
Input Voltage Range (VIN)
3.0
5.5
V
VIN UVLO Threshold
Rising
2.75
2.9
3.0
V
VIN UVLO Hysteresis
320
mV
Quiescent Current
PWM Mode, VEN > 1.8V, VFB = 0.9V, IOUT = 0A
1
mA
Shutdown Current
VEN = 0V
1
5
µA
Reference Voltage
Feedback Voltage
±2% over temperature
0.98
1
1.02
V
Feedback Bias Current
VFB = 1V
1
nA
Output Voltage Line Regulation
VIN = VEN = 4V to 5.5V, ILOAD = 100mA
0.2
%
Output Voltage Load Regulation
100mA < ILOAD < 1.2A
0.2
%
Enable Control
Enable Logic High Threshold
1.2
1.8
V
Enable Logic Low Threshold
0.4
1
V
Input Current Limit
VFB = 0.5V, RLIMIT = 107kΩ
0.5
0.7
0.9
VFB = 0.5V, RLIMIT = 68.1kΩ
0.7
1.1
1.5
Input Current Limit
VFB = 0.5V, RLIMIT = 46.4kΩ
1.1
1.6
2.1
A
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.


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