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MIC2224YML Datasheet(PDF) 3 Page - Micrel Semiconductor

Part # MIC2224YML
Description  High Efficiency 2MHz PWM Buck Converter with DAC Input and 40mOHM Bypass Switch
PDF  13 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC2224YML Datasheet(HTML) 3 Page - Micrel Semiconductor

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Micrel
MIC2224
January 2005
3
M9999-012705
www.micrel.com
Absolute Maximum Rating (Note 1)
Supply Voltage (VIN) ..................................... 0V to 6V
Output Switch Voltage (VSW) ................................. 6V
DAC Input Voltage (VDAC) ................... 0V to Vin+0.3V
Output Switch Current (ISW) ................................ 2.5A
Logic Input Voltage (VEN).................... 0V to VIN+0.3V
Storage Temperature (TS) ............... -65°C to +150°C
Operating Ratings
Supply Voltage (VIN)................................2.7V to 5.5V
Output Voltage (VOUT) ................................0V to 5.5V
DAC Input Voltage (VDAC) ......................... 0.1V to Vin
Junction Temperature Range (TJ) .. -40°C to +125°C
Thermal Resistance
θ
JA MLF .................................................... 60°C/W
Electrical Characteristics
(4)
VIN = VEN = 3.6V;VDAC=0.6V; L = 4.7µH; COUT = 1µF; TA = 25°C, unless noted. Bold values indicate –40°C< TJ < +125°C
Parameter
Condition
Min
Typ
Max
Units
Supply Voltage Range
2.7
5.5
V
Total Quiescent Current
VDAC = 0.6V VOUT = 2.4V
(regulator on, not switching)
360
450
µA
Shutdown Current
VEN = 0V (regulator off)
1
5
µA
Maximum Duty Cycle
100
%
Regulation
Output Voltage
VDAC = 0.6V, ILOAD =0mA
1.746
1.8
1.854
V
Output Voltage Line Regulation
3.0V
≤ V
IN ≤ 4.5, ILOAD= 10mA
0.05
0.5
%/V
Output Voltage Load Regulation
0mA < IOUT < 500mA
0.2
%
Output
Switch On-Resistance
ISW = -100mA, High-Side Switch
ISW = 100mA , Low-Side Switch
0.55
0.6
0.75
0.85
Ω
Current limit (Peak SW Current)
0.65
0.85
1.6
A
Oscillator
Frequency
1.8
2
2.2
MHz
Enable / UVLO
Enable Pin Threshold
0.5
0.9
1.3
V
Enable Pin Hysteresis
30
mV
Enable Pin Input Current
0.01
1
µA
EN high to 90% VOUT
25
50
µs
Under-Voltage Lockout Threshold
(turn-on)
2.6
2.7
V
UVLO Hysteresis
85
mV
DAC Input
DAC Input Current
0.15
2
µA
Output Voltage/DAC Voltage
(internally set)
3
V/V



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